WO2017107955A1 - Titanium nickel-based shape memory alloy tissue closing clip, release device, and clip accommodating device - Google Patents

Abstract

A titanium nickel-based shape memory alloy tissue closing clip (90), a release device (80), and a clip accommodating device. The closing clip (90) is a closed strip made of a hyperelastic titanium nickel-based shape memory alloy material, and the closed strip is formed by means of end-to-end connection of at least three outer segmental arcs (91) and the same quantity of inner segmental arcs (92) in a stagger manner, and is formed in a dish shape or a bowl shape. The closing clip (90) also comprises tooth-shaped protrusions (93) disposed on the tops of the inner segmental arcs (92) and pointing to the center of the closing clip (90), and comprises parallel clips that are same in quantity and are in a one-to-one correspondence with the outer segmental arcs (91). The tissue closing clip (90) is used for closing for treating tissue perforation, anal fistula endostoma and alimentary tract hemorrhage as well as excision of polypus tissue. By means of the shape memory property and hyperelasticity of titanium nickel-based shape memory alloy, the closing clip is opened when a temperature is lower than a set temperature or under external force and is automatically closed when the temperature is higher than the set temperature or external force is withdrawn, and treatment is carried out by performing continuous automatic pressurization on a focus. The closing clip is quite simple in structure, machining technology and operation process, and finally, no foreign matter is left in the body.

Description

Titanium-nickel-based shape memory alloy tissue closure clip, dispenser, clipper Technical field

The invention relates to a tissue closure clip and a corresponding dispenser and clipper, in particular to a tissue closure clip made of a titanium-nickel based shape memory alloy material and a corresponding dispenser and clipper. The tissue closure clip of the present invention is used for tissue perforation, anal fistula, closure of gastrointestinal bleeding, and excision of polyp tissue.

Background technique

At present, the tissue occluder used in clinical practice adopts a disposable gastrointestinal tract occluder as an auxiliary device, for example, the stainless steel nail is used to make the incision anastomosis when the anal fistula is closed, or the purulent suture method is used to close the anal fistula internal opening. The device is a traumatic surgical instrument, the patient suffers great pain, and the stainless steel nail will remain in the human body for a long time, and even cause surgery failure.

To this end, the Applicant has invented a titanium-nickel-based shape memory alloy tissue closure clip, see Figures 1 - 46, which utilizes the shape memory properties and superelasticity of the titanium-nickel-based memory alloy below the set temperature. Or open under the action of external force, automatically close after the temperature is set above or the external force is unloaded, and the lesion is continuously and automatically pressurized to achieve the purpose of treatment. However, the shape memory characteristics, superelasticity and sterility requirements of the titanium-nickel-based memory alloy closure clip make it difficult to be opened and temporarily fixed on the closing clamp of the dispenser, and the external force is unloaded to make it accurate. It is also very difficult to close to the lesion. Therefore, there is also a need for a dispenser and clipper for use with a closure clip.

Summary of the invention

One of the objects of the present invention is to provide a titanium-nickel-based shape memory alloy tissue closure clip which utilizes the shape memory property and superelasticity of a titanium-nickel-based memory alloy to be opened at a temperature lower than a set temperature or under an external force. After the set temperature or external force is unloaded, it is automatically closed, and the lesion is continuously and automatically pressurized to achieve the purpose of treatment.

The second object of the present invention is to provide a new titanium-nickel-based shape memory alloy tissue closure clip which is used in a surgical procedure, which can temporarily fix the shape of the opened closure clip and then quickly and accurately according to the doctor's motion. Release the closure clip.

A third object of the present invention is to provide a new titanium-nickel-based shape memory alloy tissue closure clip that provides a clipper for use during surgery that can easily open and temporarily secure the closure clip to the closure holder of the dispenser.

The technical solution of the present invention is: a titanium-nickel-based shape memory alloy tissue closure clip made of a titanium-nickel-based shape memory alloy material, which is special in that it comprises a closure clip body composed of a closed strip material; The closed strip is smoothly connected by at least three outer arc segments 91 and a same number of inner arc segments 92 in a staggered manner; the closed clip body is a planar layout, a dish layout or a bowl layout.

The number of the outer arc segments 91 is three, four, five, six or eight.

The closure clip described above also includes a toothed projection 93 disposed at the top of each inner arc segment 92 and directed toward the center of the closure clip.

The number of the outer arc segments 91 is three, four, five, six or eight.

The diameter of the circle at the top of all outer arc segments 91 is 10-20 mm, the diameter of the circle at the top or top dentate projection 93 of all inner arc segments 92 is 1-4 mm; the cone angle of the closed clip body is 120- 180°.

The diameter of the circle at the top of all outer arc segments 91 is 12-16 mm, the diameter of the circle at the top or top dentate projection 93 of all inner arc segments 92 is 1-3 mm; the cone angle of the closed strip is 160 °.

The closing clip further includes parallel clips of the same number and one-to-one correspondence with the outer arc segments 91; the parallel clips include two clip bodies 94 arranged in parallel; the fixed ends of the two clip bodies 94 and the outer arc segments 91, respectively The two ends are fixedly connected, and the non-fixed end is located in an area surrounded by the outer arc segment 91.

The opposite sides of the two clamping bodies 94 are respectively provided with engaging means; the engaging means comprises at least one pointed tooth 941 which is convex and the pointed teeth are offset from the pointed teeth of the opposite clamping body, or at least convexly included a tines 941 and a concave groove 942 and the grooves are matched with the number of shapes of the tines of the opposite body, or include at least one rounded protrusion 943 and a concave rounded groove 944 The rounded grooves match the number of rounded projections of the opposing collet.

The diameter of the circle at the top of all outer arc segments 91 is 10-20 mm, the diameter of the circle at the top or top dentate projection 93 of all inner arc segments 92 is 1-4 mm; the cone angle of the closed strip is 120 -180°; the distance between the two clips 94 is 0.5-2 mm.

The diameter of the circle at the top of all outer arc segments 91 is 12-16 mm, and the diameter of the circle at the top or top dentate projection 93) of all inner arc segments 92 is 1-3 mm; the cone angle of the closed strip is 160°.

A dispenser for a titanium-nickel-based shape memory alloy tissue closure clip, comprising a housing; the housing is provided with a handle, the handle and the housing being a snap-fit cavity structure, the special features of which are:

The utility model further comprises a push rod unit disposed in the outer casing and a push ring unit disposed at the front end of the outer casing;

The push rod unit includes a trigger, a push rod, a return spring, and a limiting device; the push rod can move forward under the action of the trigger and the limiting device, and return to the original position under the action of the return spring and the limiting device ;

The push ring unit includes an upper pressure seat, a lower pressure seat, a wire fixing seat, two steel wires, and a push ring;

The upper pressure seat and the lower pressure seat are buckled up and down into an L-shaped tubular cavity structure, and the rear end thereof is opposite to the front end of the casing Connecting, the front end thereof is turned downward by 80-100 degrees to form a closed clamping seat, the closing clamping seat is provided with a through hole penetrating up and down; the wire fixing seat is disposed at the rear end of the L-shaped tubular cavity structure and is connected with the push rod The front ends are connected; the rear ends of the two wires are respectively fixed on the wire fixing seat, and the middle portions are arranged in parallel between the upper pressing seat and the lower pressing seat, and the front ends thereof are respectively hinged with the pushing ring sleeved outside the closing clamping seat.

The limiting device comprises a front limiting seat and a rear limiting seat disposed in the outer casing, wherein the front portion of the pushing rod is disposed in front of the front limiting seat, and the middle portion of the pushing rod is disposed in the front limiting seat and the rear limit Between the seats, a spring seat is disposed thereon, the return spring is sleeved in the middle of the push rod and located between the front limit seat and the spring seat, and the rear portion of the push rod is disposed behind the rear limit seat, A trigger slot is disposed below; the trigger is disposed on the inner side of the handle, one end of which extends outside the handle, and the other end of which is engaged in the trigger slot.

The wire fixing seat and the pushing rod are connected by a rotating mechanism, the wire fixing seat is connected to one end of the rotating mechanism, and the pushing rod is connected to the other end of the rotating mechanism, and the wire fixing seat can surround the central axis of the pushing rod Rotate.

The rotating mechanism includes a fixed shaft and a moving shaft, and the end of the moving shaft is provided with a boss, the boss is fixedly connected to the wire fixing seat through the neck, the diameter of the boss is larger than the diameter of the neck; Provided with a card slot adapted to the boss and a rotation limiting slot adapted to the neck, the boss can be inserted into the card slot from the side of the fixed shaft and rotated therein, the neck can be The side of the fixed shaft snaps into the rotation limit groove and rotates therein.

The push rod unit further includes a safety pin; the safety pin is disposed at the rear of the outer casing, the button is located on the outer surface of the outer casing, and the hook is disposed inside the outer casing, and the hook can be inserted into or away from the push rod by the button. The safety bolt slot on the back.

The push rod unit further includes a safety mechanism; the safety mechanism is a safety bracket, one end of which is hinged to the inner side of the trigger, and the other end of which is snapped inside the handle to fix the angle of the trigger relative to the handle.

The handle and the outer casing are a pistol-shaped cavity structure that is buckled to the left and right.

A clipper for a titanium-nickel-based shape memory alloy tissue closure clip, which is special in that it comprises a clamping cone assembly 40; the clamping cone assembly 40 comprises a clamping cylinder 41 and a clamping cone which are sequentially connected 43. The prism body 42; a plurality of second guiding grooves 411 are uniformly disposed on the circumferential side surface of the clamping cylinder 41; a plurality of clamping cone grooves 431 are evenly distributed on the tapered surface of the clamping cone 43; The prism 42 includes a plurality of circumferentially spaced prisms 421; the number of prisms 421 is the same as the number of arc segments 92 in the closure clip 90 and the cross-sectional shape of the prism 42 is between the closed clip arc 92 The gaps are matched; the prisms 421 correspond to the positions of the second guiding grooves 411; one end of each of the clamping tapered grooves 431 is located at an intermediate position between two adjacent prisms 421, and the other end is located at two adjacent second guides. The intermediate position of the slot; the outer diameter of the clamping cylinder 41 matches the outer diameter of the closing clamp 22 of the dispenser 80; the second guiding slot 411 is closed The positions of the first guiding grooves 221 on the holder 22 are in one-to-one correspondence.

The above-described clamping cone assembly 40 further includes a positioning post 44 disposed at an outer end surface of the clamping cylinder 41; the positioning post 44 mates with the through hole 21 of the closing clamp 22 of the dispenser 80.

The positioning post is provided with a positioning edge 441; the positioning edge 441 is matched with a positioning groove on the through hole 21 of the closing holder 22 of the dispenser 80.

The clip holder further includes a clip holder assembly 30; the clip holder assembly 30 includes a housing, a plurality of card plates 31, and a clamping post hole 32 disposed inwardly from an end portion of the housing, and a clamping taper hole 34. The prism hole 33; the clamping cone hole 34 is matched with the shape of the clamping cone 43; the prism hole 33 is matched with the shape of the prism body 42; the plurality of clamping plates 31 are uniformly distributed around the clamping column hole 32. The inner side of each of the card plates is provided with a latching tooth 311; the number of the latching plate 31 and the second guiding slot 411 are identical, and the positions are in one-to-one correspondence; the latching teeth 311 can be stuck Closing the corresponding outer arc segment 91 on the clip 90, thereby driving the closed clip of the planar layout, the dish layout or the bowl layout to pass through the prism body 42, the clamping cone, and then move to the clamping cylinder 41 to expand into a cylinder Shape layout.

The number of the prisms 421 described above is 3, 4, 5, 6, and 8.

The clip holder further includes a reverse seat assembly 50; the reverse seat assembly 50 includes a stepped reverse column 52 and a reverse sleeve 51 sleeved on the reverse column 52; the circumferential side of the reverse column 52 is disposed a plurality of third guiding grooves 521 corresponding to the number of the second guiding grooves 411 and corresponding to the positions of the second guiding grooves 411; the outer diameter of the inverted column 52 is consistent with the outer diameter of the positioning post 44; the reverse sleeve can be applied by an external force The lower edge moves toward the reverse column and is reset by the internal spring.

The reverse seat assembly 50 further includes a reverse positioning post 53 disposed on an outer end surface of the reverse column 52. The outer end surface of the clamping cylinder 41 is provided with a reverse column hole 45, and the inverted column hole 45 is inverted. Matching to the positioning post 53.

The number of the prisms 421 described above is 3, 4, 5, 6, and 8.

The beneficial effects of the invention are:

1. The closing clip of the invention is a closed strip shape, which is formed by staggering a plurality of outer arc segments and inner arc segments connected end to end, and the structure is very simple.

2. The closing clip of the invention is cut into a closed strip by using a titanium-nickel-based shape memory alloy sheet or pipe, which can be used after being processed by a memory, and the processing process is simple.

3. In order to enhance the closing effect, the closing clip of the invention adopts a four-stage anti-drop device: the first stage is a closed clip body, which is made of a titanium-nickel-based shape memory alloy material having superelasticity above the memory temperature, and is set. The memory temperature of the material is lower than the body temperature. When the closure clip enters the human body, the material exhibits superelasticity, shrinks inward and continuously pressurizes the tissue; the second stage is placed at the top of each inner arc segment and points Close the center of the dentate protrusion, which can penetrate the inside of the tissue to prevent the closing clip from falling off; the third stage is to set the parallel clip to clamp the tissue in all directions to improve the closing effect; the fourth stage is to set the engaging device on the parallel clip By clamping the oppositely disposed engaging means, the tissue can be further clamped, and the accidental falling off of the closing clip can be prevented to the utmost.

4. The surgical procedure of the present invention is simple. When the tissue is closed for the tissue, the closed clip is clamped on the outer peripheral tissue of the tissue perforation, and the dentate protrusion on the inner arc segment or the inner arc segment of the closed clip is automatically subjected to the external temperature of the inner tissue of the anastomosis tissue under the action of body temperature. Pressurization, the tissue around the mouth of the tissue does not form new wounds, maintains good blood circulation while overcoming the tissue tension, and promotes the closure of the perforation of the tissue, and the surgical effect is good.

5. The closed clip of the present invention maintains good blood circulation at the end of the tissue clamping, and promotes the healing of the perforation of the tissue. At the same time, the tissue end necrosis caused by tissue ischemia causes the tissue closure clip to fall off automatically, and finally can be done. No foreign matter is left in the body.

6. The closure clip of the present invention can also be removed by a tool in a special case or can be implanted in the body for a long time.

7. The present invention has the dual functions of tissue resection and tissue anastomosis.

8. The invention adopts a centripetal closed mode, which can realize all-round closure, and has better closing effect than the existing parallel closed mode.

9. The invention is a non-invasive surgical instrument.

10. The device of the present invention is a special device for releasing the anastomosis of the memory alloy tissue, and is mainly used for vascular closure of the gastrointestinal bleeding point, perforation of the digestive tract tissue, excision of local tissue hyperplasia, resection of hemorrhoids, closure of the anal fistula.

11. The device of the invention has simple structure and convenient operation, can achieve the purpose of tissue resection or anastomosis, and reduces the surgical burden of the doctor.

12. The structure of the coupling rod unit and the rotary joint unit of the present invention adopts a coupling and a rotary joint structure, so that the push ring unit can rotate around its own axis when the handle is not moved, thereby adapting to the lesions at different angles.

13. The clipper of the present invention can easily expand the titanium-nickel-shaped shape memory alloy tissue closure clip from a planar layout, a dish layout or a bowl layout to a cylindrical layout, thereby opening the closure clip and temporarily fixing it to the dispenser. Column closed on the clamp.

14. The clipper of the present invention can realize the formal or reverse mounting of the closing clip, and is suitable for use in various different lesions.

15. The clipper of the present invention has a simple structure and is convenient to use.

DRAWINGS

1 to 4 are schematic views of a tissue closure clip including three outer arc segments;

Figure 1 is a front view of the memory before deformation;

Figure 2 is a perspective view of the effect before the memory deformation, it can be seen that the strips are in the same plane;

Figure 3 is a bottom view effect diagram after memory deformation, it can be seen that the inner arc segment is shifted to one side;

Figure 4 is a perspective view of the memory after deformation, it can be seen that the inner arc segment is shifted to one side;

5 to 8 are schematic views of a tissue closure clip including three outer arc segments with a toothed projection on the top of the inner arc segment;

Figure 5 is a front view of the memory before deformation;

Figure 6 is a perspective view of the effect before the memory deformation, it can be seen that the strips are in the same plane;

Figure 7 is a bottom view effect diagram after memory deformation, it can be seen that the inner arc segment is shifted to one side;

Figure 8 is a perspective view of the memory after deformation, it can be seen that the inner arc segment is shifted to one side;

9 through 12 are schematic views of a tissue closure clip including four outer arc segments;

Figure 9 is a front view of the memory before deformation;

Figure 10 is a perspective view of the effect before the memory deformation, it can be seen that the strips are in the same plane;

Figure 11 is a bottom view effect diagram after memory deformation, it can be seen that the inner arc segment is shifted to one side;

Figure 12 is a perspective view of the memory after deformation, it can be seen that the inner arc segment is shifted to one side;

13 to 16 are schematic views of a tissue closure clip including four outer arc segments with a toothed projection on the top of the inner arc segment;

Figure 13 is a front view of the memory before deformation;

Figure 14 is a perspective view of the effect before the memory deformation, it can be seen that the strips are in the same plane;

Figure 15 is a bottom view effect diagram after memory deformation, it can be seen that the inner arc segment is shifted to one side;

Figure 16 is a perspective view of the memory after deformation, it can be seen that the inner arc segment is shifted to one side;

17 to 20 are schematic views of a tissue closure clip including five outer arc segments;

Figure 17 is a front view of the memory before deformation;

Figure 18 is a perspective view of the effect before the memory deformation, it can be seen that the strips are in the same plane;

Figure 19 is a bottom view effect diagram after memory deformation, it can be seen that the inner arc segment is shifted to one side;

Figure 20 is a perspective view of the memory after deformation, it can be seen that the inner arc segment is shifted to one side;

21 to 24 are schematic views of a tissue closure clip including five outer arc segments with a toothed projection on the top of the inner arc segment;

Figure 21 is a front view of the memory before deformation;

Figure 22 is a perspective view of the effect before the memory deformation, it can be seen that the strips are in the same plane;

Figure 23 is a bottom view effect diagram after memory deformation, it can be seen that the inner arc segment is shifted to one side;

Figure 24 is a perspective view of the memory after deformation, it can be seen that the inner arc segment is shifted to one side;

25 to 28 are schematic views of a tissue closure clip including six outer arc segments;

Figure 25 is a front view of the memory before deformation;

Figure 26 is a perspective view of the effect before the memory deformation, it can be seen that the strips are in the same plane;

Figure 27 is a bottom view effect diagram after memory deformation, it can be seen that the inner arc segment is shifted to one side;

Figure 28 is a perspective view of the memory after deformation, it can be seen that the inner arc segment is offset to one side;

29 to 32 are schematic views of a tissue closure clip including six outer arc segments with a toothed projection on the top of the inner arc segment;

Figure 29 is a front view of the memory before deformation;

Figure 30 is a perspective view of the effect before the memory deformation, it can be seen that the strips are in the same plane;

Figure 31 is a bottom view effect diagram after memory deformation, it can be seen that the inner arc segment is shifted to one side;

Figure 32 is a perspective view of the memory after deformation, it can be seen that the inner arc segment is shifted to one side;

33 to 36 are schematic views of a tissue closure clip including eight outer arc segments;

Figure 33 is a front view of the memory before deformation;

Figure 34 is a perspective view of the effect before the memory deformation, it can be seen that the strips are in the same plane;

Figure 35 is a bottom view effect diagram after memory deformation, it can be seen that the inner arc segment is shifted to one side;

Figure 36 is a perspective view of the memory after deformation, it can be seen that the inner arc segment is shifted to one side;

37 to 38 are schematic views of a tissue closure clip comprising eight outer arc segments with a toothed projection on the top of the inner arc segment;

Figure 37 is a front view of the memory before deformation;

Figure 38 is a perspective view of the memory after deformation, it can be seen that the inner arc segment is offset to one side;

Figure 39 is a schematic view of a tissue closure clip comprising four outer arc segments, a top toothed projection on the inner arc segment, four parallel clips, and a scalloped protrusion on the parallel clip;

Figure 40 is a schematic view of a tissue closure clip comprising four outer arc segments, a top toothed projection on the inner arc segment, four parallel clips, and a scalloped projection and groove disposed on the parallel clip;

Figure 41 is a schematic view of a tissue perforated inner port closure clip comprising four outer arc segments, an inner arc segment top toothed projection, four parallel clips and parallel clips provided with rounded protrusions and circular grooves;

Figure 42 is a schematic view showing an open state of a tissue perforated inner opening closure clip comprising three outer arc segments, an inner arc segment top with a toothed projection, three parallel clips and a parallel clip provided with a rounded projection and a circular groove;

Figure 43 is a schematic view of a tissue perforated inner port closure clip comprising three outer arc segments, an inner three arc segment top toothed projections, three parallel clips and parallel clips provided with rounded protrusions and circular grooves;

Figure 44 is a perspective view showing the stereoscopic effect of the tissue perforation inner opening closure clip of Figure 43;

Figure 45 is a schematic view of another tissue closure clip comprising four outer arc segments, a top toothed projection on the inner arc segment, four parallel clips, and a scalloped protrusion on the parallel clip;

Figure 46 is a schematic view of another tissue closure clip comprising four outer arc segments, a top toothed projection on the inner arc segment, four parallel clips and a parallel clip with rounded projections and round grooves;

Figure 47 is a cross-sectional view of the dispenser;

Figure 48 is a schematic structural view of the push ring unit after the upper press seat is removed;

Figure 49 is a schematic structural view of a push ring unit;

Figure 50 is an overall view of the dispenser;

Figure 51 is an exploded perspective view of the dispenser;

Figure 52 and Figure 53 are schematic structural views of the clamping cone assembly of the present invention;

Figure 54 is a schematic structural view of the clip holder assembly of the present invention;

Figure 55 is a cross-sectional view of Figure 54;

Figure 56 is an initial state view of the closure clip being mounted on the clip cone assembly of the present invention and the clip holder assembly not yet sheathed;

57 is a schematic view showing the initial position of the clamping seat assembly, the clamping cone assembly, the closing clamp, and the dispenser;

Figure 58 is a schematic view showing the position of the clamping seat assembly pressing the closing clamp into the clamping cone assembly;

Figure 59 is a schematic view showing the position where the holder assembly and the dispenser are completely fitted;

Figure 60 is a schematic view showing the position of the closing clip when the clamping seat assembly is about to be disengaged from the dispenser;

Figure 61 is a schematic view showing the position of the dispenser when the chucking assembly is about to be disengaged from the dispenser;

Figure 62 is an initial state view of the closure clip being mounted on the clamping cone assembly of the present invention and the clamping seat assembly not yet sheathed;

Figure 63 is a schematic view showing the position of the closing clip being mounted on the inverted seat assembly of the present invention;

Figure 64 is a schematic view showing the position of the closing clip reversely mounted on the closing holder of the dispenser of the present invention;

LIST OF REFERENCE NUMERALS: 1-handle, 2-trigger, 3-trigger torsion spring, 4-safety bolt, 5-rear limit seat, 6-trigger slot, 7-push rod, 8-safety slot, 9-front limit Seat, 10-Return Spring, 11-Retaining Ring, 12-Shell, 13-Rotating Joint, 14-Coupling, 15-Wire Mount, 16-Mount Bolt, 17-Wire, 18-Upper Seat, 19 - lower press seat, 20-push ring, 21-through hole, 22-closed clamp seat, 221-first guide groove, 23-spring seat, 24-guide post, 25-guide cone, 26-clamp neck , 27-safety bracket, 30-clamping unit, 31-card, 311-tooth, 32-clamping post, 33-clamping prism hole, 34-clamping taper, 40-clamping cone , 41-Clamping cylinder, 411-Second guiding groove, 42-prism, 421-prism, 43-clamping cone, 431-clamping cone, 44-positioning post, 441-positioning groove, 45 - Reverse positioning hole, 451- backward Positioning hole groove, 50-reverse seat assembly, 51-reverse sleeve, 52-reverse column, 521-third guide groove, 53-reverse positioning column, 80-player, 90-closed clip, 91- Outer arc segment, 92-inner arc segment, 93-toothed projection, 94-clamp, 941-toothed, 942-V-shaped groove, 943-smooth protrusion, 944-smooth groove.

detailed description

Referring to FIGS. 1 to 46, a titanium-nickel-based shape memory alloy tissue closure clip includes a closure clip body, and the closure clip body is a closed strip of titanium-nickel-based shape memory alloy material, and the strips are staggered by at least three The outer arc segment and the same number of inner arc segments are connected end to end in a planar layout, a dish layout or a bowl layout; the closed strip of the dish layout or the bowl layout has a cone angle range of 120-180°, The best is 160°. The closed strip is processed into a clinically desirable memory trait by a titanium-nickel-based shape memory alloy material having a superelasticity above the memory temperature. The shape can be changed when the external force acts below or below the memory temperature, and the memory shape is restored after the external force is unloaded or again above the memory temperature. The optimal number of outer arc segments is 3 or 4, and 5, 6, or 8 can also be used for special needs.

The strip is a titanium-nickel-based shape memory alloy material, which has superelasticity at the memory temperature, and its shape can be changed by an external force, and the memory shape is restored after the external force disappears.

In order to achieve the best surgical effect, the memory shape is set under the memory temperature condition, the diameter of the circle at the top of all inner arc segments is 1-4 mm, and the diameter of the circle at the top of all outer arc segments is 10-20 mm; Under the memory temperature condition, the diameter of the circle at the top of the inner arc segment of the external force can be changed, which is the same as the outer arc size. When the memory temperature is reached or exceeded and the external force is unloaded, the diameter of the circle where the tops of all the inner arc segments are close to the center of the strip is restored to 1-4 mm.

In order to prevent the closing clip from accidentally falling off and at the same time achieving a better closing effect, a toothed protrusion may be provided at the top of each inner arc segment, and the toothed protrusions are all toward the center of the closing clip.

In order to further enhance the closing effect, the closing clip may further comprise parallel clips corresponding to the number of outer arc segments; each parallel clip comprises two clip bodies arranged in parallel; the fixed ends of the two clip bodies are respectively fixed to the two ends of the outer arc segment The non-fixed end is located in the area enclosed by the outer arc segment.

In order to prevent accidental falling off during the closing process, an engaging device may be respectively disposed on opposite sides of the two clamping bodies. The meshing device can have a variety of structural forms, the main three structures are:

1. The engaging device comprises at least one tines that are convex, and the tines of the tines are offset from the teeth of the opposing body; in FIG. 41, each of the clips comprises two tines, and the four tines of each of the clips are staggered. arrangement.

2, the engaging device comprises at least one pointed tooth and a concave groove, and the groove is matched with the shape of the tines of the opposite body, for example, the groove may be a circular groove or a V-shaped groove; In Fig. 42, each of the clips includes two tines and two circular grooves, and the tines are disposed corresponding to the circular grooves on the opposite body.

3. The engaging means comprises at least one rounded protrusion convexly and a concave circular groove and the circular groove is matched with the number of rounded protrusions of the opposite body; in Fig. 43, each of the bodies comprises a rounded protrusion and a Round chute.

The closed clip is clamped on the peripheral tissue of the perforation of the tissue, and the inner arc segment or the inner arc segment and the dentate protrusion with the superelastic closure clip are used to automatically pressurize the inner mouth of the anastomosis tissue, and the blood circulation is performed while being pressurized. The scar on the good side of the tissue proliferates, and the inner mouth is healed, achieving the purpose of no trauma and no foreign body in the body.

Referring to FIGS. 47 to 51, a dispenser for a titanium-nickel-based shape memory alloy tissue closure clip includes a housing, a push rod unit disposed within the housing, and a push ring unit disposed at a front end of the housing; the housing is provided with a handle, a handle, and The outer casing is a pistol-shaped cavity structure that is fastened to the left and right. The push rod unit includes a trigger, a push rod, a return spring, and a limit device; the push rod can move forward under the action of the trigger and return to the original position under the action of the return spring. The limiting device comprises a front limiting seat and a rear limiting seat arranged in the outer casing, the front part of the pushing rod is arranged in front of the front limiting seat, and the middle part of the pushing rod is arranged between the front limiting seat and the rear limiting seat; a spring seat is arranged thereon, the return spring sleeve is located in the middle of the push rod and is located between the front limit seat and the spring seat, the rear part of the push rod is disposed behind the rear limit seat, and a trigger slot is arranged below the trigger slot; the trigger setting On the inside of the handle, one end of the handle extends outside the handle, and the other end of the handle is inserted into the trigger slot; the push rod unit may further include a safety device plug; the safety device may be a safety pin or a safety bracket. The safety pin is disposed at the rear of the outer casing, and the button is located on the outer surface of the outer casing, and the hook is disposed inside the outer casing, and the hook can be driven by the button to enter or leave the safety bolt slot above the rear of the push rod; the one end of the safety bracket is hinged In the middle of the inner side of the trigger, the other end can be snapped inside the handle to fix the angle of the trigger relative to the handle. The push ring unit comprises an upper pressure seat, a lower pressure seat, a wire fixing seat, a steel wire and a push ring; the upper pressure seat and the lower pressure seat are buckled up and down into an L-shaped tubular cavity structure, and the rear end thereof is connected with the front end of the casing, and the front end thereof Turning down 80-100 degrees to form a closed clamping seat, the closing clamping seat is provided with a through hole penetrating up and down; the wire fixing seat is arranged at the rear end of the L-shaped tubular cavity structure and connected with the front end of the pushing rod; On the wire fixing seat, the two ends of the wire are parallel and forwardly extended between the upper pressure seat and the lower pressure seat, and are bent downward to the closed clamping seat, and the two ends of the steel wire are respectively hinged to the outside of the pushing ring which is sleeved outside the closing clamping seat. The front end of the wire fixing base and the push rod are connected by a coupling; the rear end of the L-shaped tubular cavity structure is connected to the front end of the outer casing by a rotary joint.

Closed clamp working principle: Titanium-nickel-based shape memory alloy tissue closure clip, including closed clip body composed of closed strip; closed strip consists of staggered at least three outer arc segments and the same number of inner arc segments Connection; the closed strip forms a planar layout, a dish layout or a bowl layout; the closed strip is made of a titanium-nickel-based shape memory alloy material having a superelasticity above the memory temperature when the external force acts or is lower than the memory The shape can be changed at the temperature, and the external force is restored after being unloaded or again above the memory temperature. Memory shape.

The working principle of the titanium-nickel-based shape memory alloy tissue closure clip is to utilize the temperature effect of the titanium-nickel-based shape memory alloy and the superelastic function to pull down under the action of low temperature and external force, and close to the memory shape under the high temperature, and the human tissue proliferation, The combination of the physiological mechanism of necrosis and the rationality of the design of the titanium-nickel-based shape memory alloy tissue closure clip structure achieves the purpose of tissue tissue anastomosis.

The closed clip made of the shape memory function of the titanium-nickel-based shape memory alloy material is released to the lesion, so that the closed clip which can change with temperature or external force can play a leading role in clinical operation.

Tissue anastomosis: The memory alloy anal fistula internal closure clip is memorized in a semi-closed state, and the closed gap is about 1-2 mm. After the closed closing clip is pulled apart, it is sleeved on the closing clamp of the present invention, the trigger is pulled, the pushing rod moves forward, the wire is moved forward, the steel wire drives the pushing ring to move downward, and the closing clamp is pushed to the need. Closed tissue. If necessary, tie the tissue with a thin wire, thread the thread out of the through hole, tighten it, pull the tissue into the closing clip, then pull the trigger and release the closing clip so that the ring center clamps the tissue to be closed. Continue to automatically pressurize and press the tissue tightly to match. The pressurized tissue has good blood circulation, and the pressurized tissue hyperplasia forms scar tissue to provide tissue regeneration and achieve tissue anastomosis.

Tissue resection: Memory alloy anal fistula internal closure clip was memorized as fully closed, and the remaining steps were identical to tissue anastomosis. In the pressurized ring, tissue ischemia is caused to cause tissue necrosis. At the same time, one side of the tissue in the ring is necrotic, and the tissue on the other side of the ring is proliferated to make the tissue anastomosis. Due to the ischemic necrosis of the tissue in the ring, the incision is formed, the necrotic tissue is detached, and the titanium-nickel shape memory alloy closure clip is also detached. After detachment, it is excreted under the action of intestinal peristalsis, so that no foreign matter remains in the body.

Reliability of the closed clip: The closed clip made of titanium-nickel-based shape memory alloy sheet with different thicknesses has constant pressure characteristics and can compensate for different tissue thicknesses, and produces stable and long-lasting pressure on the tissue to ensure uniformity. Controlled compression and anastomosis process. The tissue anastomosis tissue is regenerated in different time periods, and the necrotic tissue is detached, which ensures the reliability of the tissue anastomosis.

Shedding time of the closed clip: The working principle of the titanium-nickel shape memory alloy anal fistula inner closure clip is to use the temperature effect function of the titanium-nickel-based shape memory alloy to pull down at a low temperature, and close to a memory shape at a high temperature, and the human tissue The physiological mechanism of hyperplasia and necrosis combined with tissue healing time was ten days, and the closure clip was removed from the body after ten days. The design principle and design structure of the titanium-nickel-based shape memory alloy tissue closure clip and the clinical operation and use are more scientific and simpler than the current clinical metal nail anastomosis device. It is an ideal tissue closure clip device.

Referring to FIGS. 52-61, the titanium-nickel-based shape memory alloy tissue closure clip holder of the dressing method includes a clamping cone assembly 40 and a chucking assembly 30; the clamping cone assembly 40 includes positioning posts sequentially connected. 44, the clamping cylinder 41, the clamping cone 43, the prism 42; the circumferential side of the clamping cylinder 41 is evenly distributed with four axial second guiding grooves 411; the clamping cone 43 is evenly distributed on the tapered surface There are four clamping cone grooves 431; the prism body 42 includes four circumferentially uniform prisms 421; the cross-sectional shape of the prism body matches the gap between the closed clip inner arc segments 92; the number of prisms 421 and the closing clip 90 The number of the arc segments 92 is the same; the prisms 421 correspond to the positions of the second guiding grooves 411; each of the clamping tapers 431 is located at an intermediate position between the adjacent two prisms 421; the outer diameter of the clamping cylinder 41 and the transmitter The outer diameters of the closing clamps 22 of 80 are matched; the second guiding grooves 411 are in one-to-one correspondence with the positions of the first guiding grooves 221 on the closing clamping seat 22; the clamping seat assembly 30 includes a housing and four axial directions. The card board 31 and the clamping post hole 32, the clamping taper hole 34 and the prism hole 33 are arranged in order from the one end of the housing; the clamping taper hole 34 is matched with the shape of the clamping cone 43; the prism hole 33 Matching the shape of the prism body 42; the four card plates 31 are evenly distributed on the inner side surface of the clamping post hole 32; the outer side end portion of each of the card plates is provided with an outwardly extending latching tooth 311; The number of the plates 31 and the second guiding grooves 411 are identical, and the positions are in one-to-one correspondence; the latching teeth 311 can catch the corresponding outer arc segments 91 on the closing clips 90, thereby driving the planar layout, the dish layout or the prismatic layout on the prisms. The closed clip of the bowl layout is moved to the clamping cylinder 41 through the prism body and the clamping cone, and is expanded into a closed clip of the cylindrical layout. The positioning post 44 is matched with the inner hole of the closing clamp 22 of the dispenser 80; the positioning post is provided with a positioning edge 441; the positioning edge 441 is matched with the positioning groove of the inner hole of the closing holder 22 of the dispenser 80.

Forming the clamping process: Referring to Figures 56 and 57, the closing clip 90 is placed over the prism 42 of the clamping cone assembly 40, and the positioning post 44 of the clamping cone assembly 40 is snapped into the closing jaw of the dispenser. In the hole, the four latches of the chucking assembly 30 are used to catch the four outer arc segments on the closing clip, and then the chucking assembly 30 is brought closer to the clamping cone assembly 40 (see Fig. 58). The closing clip 90 sequentially passes through the prism body, the clamping cone 43, and the clamping cylinder 41, and finally expands into a cylindrical shape and fits on the closing holder of the dispenser (see Fig. 59), and then the clamping is sequentially removed. The seat assembly 30 (see Figs. 60 and 61) and the clamping cone assembly, finally aligning the closing clip to the tissue to be closed, pulling the trigger, releasing the closing clip, and releasing the closing clip with the taper angle facing outward (ie, the dressing state) .

Referring to FIG. 62 and FIG. 63, the reverse-mounted titanium-nickel-based shape memory alloy tissue closure clip holder includes a reverse seat assembly 50, a clamp cone assembly 40 and a chuck assembly 30; the clamp cone assembly 40 includes The connecting clamping cylinder 41, the clamping cone 43, the prism 42; the circumferential side of the clamping cylinder 41 is uniformly provided with four axial second guiding grooves 411; the clamping cone 43 is evenly distributed on the tapered surface There are four clamping cone grooves 431; the prism body 42 includes four circumferentially uniform prisms 421; the cross-sectional shape of the prism body matches the gap between the closed clip inner arc segments 92; the number of prisms 421 and the closing clip 90 The number of the arc segments 92 is the same; the prisms 421 correspond to the positions of the second guiding grooves 411; each of the clamping tapers 431 is located at an intermediate position between the adjacent two prisms 421; the outer diameter of the clamping cylinder 41 and the transmitter The outer diameters of the closing clips 22 of 80 are matched; The second guiding groove 411 has a one-to-one correspondence with the position of the first guiding groove 221 on the closing clamp 22; the clamping seat assembly 30 includes a housing, four axially disposed clamping plates 31, and an end portion of the housing The clamping post hole 32, the clamping taper hole 34 and the prism hole 33 are arranged in sequence; the clamping cone hole 34 is matched with the shape of the clamping cone 43; the prism hole 33 matches the shape of the prism body 42; 4 card plates 31 is evenly distributed on the inner side surface of the clamping post hole 32; the inner side outer end of each card plate is provided with an outwardly extending latching tooth 311; the number of the latching plate 31 and the second guiding slot 411 are the same, and the position is Correspondingly; the latch 311 can catch the corresponding outer arc segment 91 on the closing clip 90, thereby driving the closed clip on the prismatic body in a planar layout, a dish layout or a bowl layout through the prism body and the clamping cone The motion is moved to the clamping cylinder 41 and expanded into a closed clip of the cylindrical layout. The positioning post 44 matches the inner bore of the closing clip 22 of the dispenser 80;

The reverse seat assembly 50 includes a stepped reverse column 52 and a reverse sleeve 51 that is sleeved on the reverse column 52. The circumferential side of the reverse column 52 is provided with four and the number of the second guiding grooves 411, and the position is one by one. Corresponding third guiding groove 521; the outer diameter of the reverse column 52 is equal to the outer diameter of the positioning post 44; the reverse sleeve can be moved along the reverse column under the action of an external force and is reset by the internal spring.

The reverse loading process: Referring to Fig. 62, the reverse positioning post 53 of the reverse seat assembly 50 is snapped into the inverted column hole 45 of the clamping cone assembly 40, and the closing clip 90 is placed into the clamping cone assembly 40. On the prism body 42, the four outer arc segments of the closing clip are clamped by the latches of the four clamping plates of the clamping seat assembly 30, and then the clamping seat assembly 30 is brought closer to the clamping cone assembly 40 to drive the closing clip. After sequentially passing through the prism, the clamping cone 43, and the clamping cylinder 41, it is finally expanded into a cylindrical shape and fitted over the inverted column 52, and then the reverse seat assembly 50 and the clamping cone assembly 40 are separated. Referring to FIG. 63, the reverse positioning post 53 of the reverse seat assembly 50 is snapped into the through hole of the closing clamp of the transmitter.

The collet assembly 30 (see Figures 60 and 61) and the clamping cone assembly will be removed in turn, and finally the closing collet will be aligned with the tissue to be closed, the trigger will be pulled, the closing clip will be released, and the closed collet will be angled toward the release. Outside (ie, the dressing state).

The invention only needs to change the number of the prisms 421, and can be applied to the titanium-nickel-based shape memory alloy tissue closure clips with the outer arc segments of 3, 5, 6, and 8.

Claims (25)

1. a titanium-nickel-based shape memory alloy tissue closure clip made of a titanium-nickel-based shape memory alloy material, comprising: a closure clip body composed of a closed strip; the closed strip being staggered by at least three The outer arc segment (91) and the same number of inner arc segments (92) are smoothly connected end to end; the closing clip body is a planar layout, a dish layout or a bowl layout.
2. The titanium-nickel-based shape memory alloy tissue closure according to claim 1, wherein the number of the outer arc segments (91) is 3, 4, 5, 6, or 8.
3. The titanium-nickel based shape memory alloy tissue closure clip of claim 1 wherein said closure clip further comprises a toothed projection disposed at the top of each inner arc segment (92) and directed toward the center of the closure clip (93). ).
4. The titanium-nickel-based shape memory alloy tissue closure clip according to claim 3, wherein the number of the outer arc segments (91) is 3, 4, 5, 6, or 8.
5. The titanium-nickel-based shape memory alloy tissue closure clip according to claim 1 or 2 or 3 or 4, wherein the diameter of the circle at the top of all outer arc segments (91) is 10-20 mm, and all inner arc segments ( 92) The diameter of the circle at the top or top dentate projection (93) is 1-4 mm; the angle of the cone of the closure clip body is 120-180°.
6. A titanium-nickel-based shape memory alloy tissue closure according to claim 5, wherein the circumference of all outer arc segments (91) has a diameter of 12-16 mm, and the top or top of all inner arc segments (92) The diameter of the circle in which the dentate projections (93) are located is 1-3 mm; the angle of the cone of the closed strip is 160°.
7. The titanium-nickel-based shape memory alloy tissue closure clip according to claim 1 or 2 or 3 or 4, wherein the closure clip further comprises a parallel clip of the same number and one-to-one correspondence with the outer arc segments (91); The parallel clip comprises two clamping bodies (94) arranged in parallel; the fixed ends of the two clamping bodies (94) are respectively fixed to the two ends of the outer arc segment (91), and the non-fixed end is located at the outer arc Within the area enclosed by paragraph (91).
8. The titanium-nickel-based shape memory alloy tissue closure clip according to claim 7, wherein the opposite sides of the two clamping bodies (94) are respectively provided with engaging means; the engaging means comprises at least one convex a tines (941) and the tines are offset from the tines of the opposing collet, or include at least one tines (941) and a concave recess (942) and the recesses and opposing pockets The number of teeth is matched to match, or includes at least one rounded protrusion (943) and a concave rounded groove (944) that are convex and that match the number of rounded protrusions of the opposing body.
9. The titanium-nickel-based shape memory alloy tissue closure clip according to claim 8, wherein the diameter of the circle at the top of all outer arc segments (91) is 10-20 mm, and the top of all inner arc segments (92) Or the diameter of the circle in which the top dentate projections (93) are 1-4 mm; the angle of the cone of the closed strip is 120-180°; the spacing of the two clamps (94) is 0.5-2 mm.
10. The titanium-nickel-based shape memory alloy tissue closure clip according to claim 9, wherein the diameter of the circle at the top of all outer arc segments (91) is 12-16 mm, and the top or top of all inner arc segments (92) The diameter of the circle in which the dentate projections (93) are located is 1-3 mm; the angle of the cone of the closed strip is 160°.
11. A dispenser for a titanium-nickel-based shape memory alloy tissue closure clip, comprising a housing; the housing is provided with a handle, and the handle and the housing are a snap-fit cavity structure, characterized in that:

    The utility model further comprises a push rod unit disposed in the outer casing and a push ring unit disposed at the front end of the outer casing;

    The push rod unit includes a trigger, a push rod, a return spring, and a limiting device; the push rod can move forward under the action of the trigger and the limiting device, and return to the original position under the action of the return spring and the limiting device ;

    The push ring unit includes an upper pressure seat, a lower pressure seat, a wire fixing seat, two steel wires, and a push ring;

    The upper press seat and the lower press seat are buckled up and down into an L-shaped tubular cavity structure, the rear end of which is connected with the front end of the outer casing, and the front end thereof is turned downward by 80-100 degrees to form a closed clamp seat, and the closed clamp seat is provided with a through hole penetrating up and down; the wire fixing seat is disposed at a rear end of the L-shaped tubular cavity structure and connected to a front end of the pushing rod; the rear ends of the two steel wires are respectively fixed on the wire fixing seat, and the middle portion is parallel It is disposed between the upper pressure seat and the lower pressure seat, and the front ends thereof are respectively hinged with the push ring sleeved outside the closed clamp seat.
12. The transmitter according to claim 11, wherein the limiting device comprises a front limiting seat and a rear limiting seat disposed in the outer casing, and the front portion of the pushing rod is disposed in front of the front limiting seat. The middle portion of the push rod is disposed between the front limit seat and the rear limit seat, and is provided with a spring seat thereon, the return spring is sleeved in the middle of the push rod and located between the front limit seat and the spring seat, The rear portion of the push rod is disposed behind the rear limit seat, and a trigger slot is disposed below the handle; the trigger is disposed on the inner side of the handle, one end of which extends outside the handle, and the other end of which is engaged in the trigger slot.
13. The transmitter according to claim 11 or 12, wherein the wire fixing base and the pushing rod are connected by a rotating mechanism, and the wire fixing seat is connected to one end of the rotating mechanism, and the pushing rod and the rotating mechanism Connected at the other end, the wire holder is rotatable about a central axis of the push rod.
14. The transmitter according to claim 13, wherein the rotating mechanism comprises a fixed shaft and a moving shaft, and an end of the moving shaft is provided with a boss, and the boss is fixedly connected to the wire fixing seat through the neck portion. The diameter of the boss is larger than the diameter of the neck; the fixed shaft is provided with a card slot adapted to the boss and a rotation limiting slot adapted to the neck, the boss can be carded from the side of the fixed axis Inserted into and rotated into the card slot, the neck can be snapped into the rotation stop slot from the side of the fixed shaft and rotated therein.
15. A transmitter according to claim 14, wherein said push rod unit further comprises a safety pin; the safety pin is disposed at the rear of the outer casing, the button is located on the outer surface of the outer casing, and the hook is disposed inside the outer casing, and the hook can be driven by the button to enter or leave the safety bolt above the rear of the push rod groove.
16. The transmitter according to claim 14, wherein the pusher bar unit further comprises a safety mechanism; the safety mechanism is a safety bracket, one end of which is hinged to the inner side of the trigger, and the other end of which is snapped to the inner side of the handle for fixing The angle of the trigger relative to the handle.
17. A dispenser according to claim 14, wherein said handle and outer casing are left and rightly fastened pistol-shaped cavity structures.
18. A clipper for a titanium-nickel-based shape memory alloy tissue closure clip, comprising: a clamping cone assembly (40); the clamping cone assembly (40) comprising a clamping cylinder (41) connected in sequence, a clamping cone (43) and a prism body (42); a plurality of second guiding grooves (411) are uniformly arranged on the circumferential side of the clamping cylinder (41); the clamping cone (43) cone The surface is uniformly provided with a plurality of clamping cone grooves (431); the prism body (42) comprises a plurality of circumferentially evenly spaced prisms (421); the number of the prisms (421) and the closed clip (90) inner arc The number of segments (92) is uniform and the cross-sectional shape of the prism (42) matches the gap between the closed clip inner arc segments (92); the prisms (421) and the second guiding grooves (411) Corresponding positions; one end of each clamping cone groove (431) is located at an intermediate position between two adjacent prisms (421), and the other end is located at an intermediate position between two adjacent second guiding grooves; the clamping cylinder The outer diameter of (41) matches the outer diameter of the closing clamp (22) of the dispenser (80); the second guiding groove (411) and the first guiding groove on the closing clamping seat (22) ( The positions of 221) correspond one-to-one.
19. The clipper according to claim 18, wherein said clamping cone assembly (40) further comprises a positioning post (44) disposed on an outer end surface of the clamping cylinder (41); said positioning post (44) ) Matching the through hole (21) of the closing clamp (22) of the dispenser (80).
20. The clipper according to claim 19, wherein the positioning post is provided with a positioning rib (441); and the positioning rib (441) communicates with the closing clip (22) of the dispenser (80). The positioning grooves on the holes (21) match.
21. A clipper according to claim 18 or 19 or 20, further comprising a clip holder assembly (30); said clip holder assembly (30) comprising a housing, a plurality of card plates (31), and a clamping post hole (32), a clamping taper hole (34), a prism hole (33) disposed in order from one end of the housing; the clamping taper hole (34) and the clamping cone (43) shape Matching; the prism holes (33) are matched with the shape of the prism body (42); the plurality of card plates (31) are circumferentially distributed on the inner side of the clamping column hole (32); the inner side of each card plate The outer end portion is provided with a latching tooth (311); the card plate (31) and the second guiding groove (411) have the same number and position one-to-one correspondence; the latching tooth (311) can catch the closing clip (90) ) corresponding to the outer arc segment (91), thereby driving the closed clip of the planar layout, the dish layout or the bowl layout The cylinder (42), after clamping the cone, moves to the clamping cylinder (41) and expands into a cylindrical layout.
22. The clipper according to claim 21, wherein the number of the prisms (421) is 3, 4, 5, 6, 8.
23. The clipper according to claim 21, wherein said clipper further comprises a reverse seat assembly (50); said reverse seat assembly (50) comprising a stepped inverted column (52) and a sleeve a reverse sleeve (51) on the reverse column (52); the circumferential side of the reverse column (52) is provided with a plurality of third portions corresponding to the number of the second guiding grooves (411) and corresponding one-to-one correspondence a guiding groove (521); the outer diameter of the inverted column (52) is identical to the outer diameter of the positioning post (44); the inverted sleeve is movable along the inverted column under the action of an external force and is reset by the internal spring.
24. The clipper according to claim 23, wherein said reverse seat assembly (50) further comprises a reverse positioning post (53) disposed on an outer end surface of the reverse column (52); said clamping post The outer end surface of the body (41) is provided with a reverse column hole (45) which is matched with the reverse positioning column 53.
25. A clipper according to claim 18, 19, 20, 23 or 24, wherein the number of said prisms (421) is 3, 4, 5, 6, 8.

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