CN104274223B

CN104274223B - Medical anastomat

Info

Publication number: CN104274223B
Application number: CN201410600960.1A
Authority: CN
Inventors: 陈望东; 丁水澄; 李来存
Original assignee: Suzhou Tianchen International Medical Technology Co Ltd
Current assignee: Suzhou Tianchen International Medical Technology Co Ltd
Priority date: 2014-10-31
Filing date: 2014-10-31
Publication date: 2017-01-18
Anticipated expiration: 2034-10-31
Also published as: CN104274223A

Abstract

The invention discloses a medical anastomat, comprising an actuating component, an anvil base, an anvil component, a staple cartridge component and a support structure, wherein the actuating component comprises a staple cartridge push rod, a front connecting rod and a rear connecting rod; the staple cartridge push rod and the rear connecting rod are respectively connected with the front connecting rod through a pivot shaft; a first sliding groove is formed in the staple cartridge push rod; the support structure is connected with a first sliding pin matched with the first sliding groove; the actuating component changes the distance between the far end of the front connecting rod and the near end of the rear connecting rod through opposite pivot of the front connecting rod and the rear connecting rod, so as to drive the staple cartridge push rod to move along a path which is defined by the first sliding groove and the first sliding pin; the support structure is provided with a second sliding groove which is parallel to the first sliding groove; and the staple cartridge push rod is connected with a second sliding pin matched with the second sliding groove. Through a defining structure for the sliding path of the staple cartridge push rod, the stability of the anastomat structure when a target tissue is closed can be ensured.

Description

Medical stapler

Technical field

The invention belongs to manufacture technology field of medical appliance is and in particular to a kind of Medical stapler.

Background technology

Anastomat is to carry out commonly used a kind of medical apparatus and instruments during surgical operation to physiological tissues such as intestinals, and it is medical science The equipment substituting traditional-handwork suture of upper use, due to the development of modern science and technology and the improvement of manufacturing technology, at present clinically The anastomat reliable in quality using, easy to use, tight, elastic suitable, especially its suture is quick, easy and simple to handle and seldom has The advantages of side effect and postoperative complication, sometimes also make the tumor operation that cannot excise in the past be able to lesion resection, be subject to very much state The favor of inside and outside Clinical Surgery doctor and high praise；The difference of this instrument performance plays vital work for whole surgical effect With.

Content of the invention

It is an object of the invention to provide a kind of Medical stapler, when it can ensure that closure destination organization, anastomat is tied The stability of structure.

For achieving the above object, the present invention provides a kind of Medical stapler, including percussion assembly, nail anvil seat, nail anvil Assembly, nail bin groupware and supporting construction, described percussion assembly includes nail bin push rod, front rod and back link, described nail bin Push rod and back link are pivotally connected with described front rod respectively, and described nail bin push rod is provided with the first sliding tray, described support Structure is connected with the first sliding pin being adapted to described first sliding tray, and described percussion assembly passes through described front rod and back link The distance between the near-end changing the far-end of described front rod and back link that is pivoted relative to each other, and and then drive described nail bin push rod Moving in the path limiting along described first sliding tray and the first sliding pin, described supporting construction is provided with and the described first slip The second parallel sliding tray of groove, described nail bin push rod is connected with the second sliding pin being adapted to described second sliding tray.

As a further improvement on the present invention, described second sliding pin is the pivot connecting described nail bin push rod and front rod Axle.

As a further improvement on the present invention, described supporting construction includes the left side brackets being oppositely arranged and right side support, Described second sliding tray is correspondingly formed in described left side brackets and right side support.

As a further improvement on the present invention, described anastomat also includes anti-overflow pin push rod, and described anti-overflow pin push rod includes Left connecting rod arm and right connecting rod arm with described left side brackets and two opposing surface cooperations of right side support respectively, wherein, when described Anastomat in original state, cock and percussion completion statuses, the projection in its axial direction of described second sliding pin and institute State left connecting rod arm and right connecting rod arm has lap.

As a further improvement on the present invention, when described anastomat is in original state, cock and percussion completion statuses When, the two ends of described second sliding pin are held on described left connecting rod arm and right connecting rod arm respectively.

As a further improvement on the present invention, relatively described first sliding tray of described second sliding pin is more adjacent to described kiss The near-end of clutch.

As a further improvement on the present invention, described second sliding tray is kidney slot.

Foregoing invention purpose can also solve in the following manner, provides a kind of Medical stapler, including percussion assembly, nail Anvil block, nail-anvil assembly, nail bin groupware and supporting construction, described percussion assembly includes the nail being slidably connected with described supporting construction Storehouse push rod, described supporting construction is provided with the second sliding tray extending from the proximate of described anastomat, described nail bin The second sliding pin being adapted to described second sliding tray is connected with push rod.

As a further improvement on the present invention, described percussion assembly includes nail bin push rod, front rod and back link, described Nail bin push rod and back link are pivotally connected with described front rod respectively, and described percussion assembly passes through described front rod and back link Be pivoted relative to each other the distance between near-end changing the far-end of described front rod and back link, and and then drives described nail bin push rod phase Described supporting construction is slided, wherein, described second sliding pin is the pivotal axis connecting described nail bin push rod and front rod.

Compared with prior art, the Medical stapler that the present invention provides passes through to arrange the second sliding tray on the support structure, Nail bin push rod in percussion assembly passes through the second sliding pin and limits nail bin push rod relative support knot with the cooperation of this second sliding tray The path of structure motion, it is to avoid nail bin push rod over-stressed is it is ensured that the structural stability of anastomat and closure impression.

Brief description

Fig. 1 is the structural representation of Medical stapler one embodiment of the present invention；

Fig. 2 is the configuration schematic diagram of nail bin groupware and nail-anvil assembly in Medical stapler one embodiment of the present invention；

Fig. 3 is the configuration schematic diagram of Medical stapler one embodiment of the present invention；

Fig. 4 is the exploded perspective view of the part-structure of Medical stapler one embodiment of the present invention；

Fig. 5 is the structural representation of anti-overflow pin push rod in Medical stapler one embodiment of the present invention；

Fig. 6 is the phantom not installing anti-overflow pin push rod in Medical stapler one embodiment of the present invention；

Fig. 7 is the phantom in original state for Medical stapler one embodiment of the present invention；

Fig. 8 is the phantom when firing completion statuses for Medical stapler one embodiment of the present invention.

Specific embodiment

Describe the present invention below with reference to specific embodiment shown in the drawings.But these embodiments are simultaneously Do not limit the present invention, structure that those of ordinary skill in the art is made, method or functionally according to these embodiments Conversion is all contained in protection scope of the present invention.

For clearly expressing described position in the application and direction, using exercises on apparatus author as reference, near operation One end of person is near-end, and the one end away from operator is far-end.Meanwhile, in this application, the lower section defining anastomat is to grip The direction that handle is extended by housing, with below this relative to, that is, be defined as the top of anastomat.

As shown in figure 1, in an embodiment of the present invention, anastomat 100 includes housing 10, stretch to far-end from housing 10 The supporting construction 20 going out, is connected to the nail anvil seat 30 of supporting construction 20 far-end.Nail anvil seat 30 can be fixedly connected with supporting construction 20, And its cross section is curved, below the near-end of housing 10, form gripping handle 40.

Anastomat 100 also includes nail bin groupware 32 and nail-anvil assembly 34.In the present embodiment, nail bin groupware 32 and nail anvil Assembly 34 is removably mounted on nail anvil seat 30, and the mating shapes with nail anvil seat 30, is nail bin groupware 32 and nail anvil The cross section of assembly 34 is also disposed as arc, so, you can in less operable space, physiological tissue is coincide.

As shown in Fig. 2 nail bin groupware 32 has nail bin 322, this nail bin 322 includes a nail bin face (sign), nail bin face On be arranged with the staple containing groove (sign) of a line or multirow in an interleaved manner, nail bin groupware 32 also includes being arranged at nail bin Pushing slice of nail 324 in 322 and cutting knife component.Suturing nail can be released from staple containing groove by pushing slice of nail 324, cutting knife component bag Include the cutting knife 328 that a knife rest 326 and is arranged on knife rest 326 far-end.It is configured with a nail bin cover 329 in nail bin groupware 32 to be used for Suturing nail in nail bin 32 and cutting knife 328 are taken blocking effect, prevents missing nail and mistakenly hit from sending out.

The slit (sign) being adapted to this cutting knife 328 is respectively equipped with nail bin face and pushing slice of nail 324, to support cutting knife 328 percussion operation.In the present embodiment, staple containing groove is located at the both sides of slit, so, to tissue cutting suture During, tissue two broken ends of fractured bone of detachment can be sutured simultaneously.

With reference to shown in Fig. 3 and Fig. 4, in an embodiment of the present invention, the far-end of nail bin groupware 32 is also associated with following closely for cooperation Anvil assembly 34, nail-anvil assembly 34 includes nail anvil 342 and knife anvil 344, while nail bin groupware 32 is installed to nail anvil seat 30, should Nail anvil 342 and knife anvil 344 can ordinatedly be arranged on nail anvil seat 30.

Supporting construction 20 includes left side and the right side support 22,24 of a pair of opposing, on left side and right side support 22,24 Be respectively arranged with can with nail anvil seat 30 on pin-and-hole and thereon default raised 302 cooperation installing holes 222,242, with realize follow closely Anvil block 30 is fixed to one another with supporting construction 20.

The other end of supporting construction 20 is connected to housing 10, and correspondingly, this housing 10 includes left shell half body 12 and right half-shell Body 14, to be connected respectively left side and right side support 22,24.

Anastomat 100 also includes firing assembly 50, and percussion assembly 50 includes the percussion handle located at anastomat 100 lower section 52nd, it is subject to the percussion handle 52 nail bin push rod 54 driving and the driving member connecting percussion handle 52 and nail bin push rod 54.Nail bin Push rod 54 can drive nail bin groupware 32 to move from the proximate of anastomat 100, with close in the presence of percussion handle 52 Nail-anvil assembly 34, finally makes nail bin groupware 32 and nail-anvil assembly 34 close.

Certainly, if being placed with physiological tissue between nail bin groupware 32 and nail-anvil assembly 34, this nail bin push rod 54 can drive Dynamic nail bin groupware 32 closes this physiological tissue near nail-anvil assembly 34 to press from both sides.

In an embodiment of the present invention, driving member includes front rod 562 and back link 564.The far-end of front rod 562 Be connected with nail bin push rod 54, the near-end of front rod 562 is connected with the far-end of back link 564, the near-end of back link 564 connect to On support structure 20.

In order to guide nail bin push rod 54 to move along predetermined closing direction, supporting construction 20 is provided with self-fitting device 100 Proximate extend the second sliding tray 228,246, correspondingly, this second sliding tray 228,246 is correspondingly formed in left side On support 22 and right side support 24.Nail bin push rod 54 is arranged between left side brackets 22 and right side support 24, be connected with thereon with Second sliding pin 561 of the second sliding tray 228,246 adaptation, nail bin push rod 54 passes through this second sliding pin 561 and the second slip Groove 228,246 is slidably matched.In anastomat 100 closing course, this second sliding tray 228,246 substantially also defines nail bin The motion path of push rod 54, and, because the second sliding tray 228,246 is formed in left side brackets 22 and right side support 24, when During the second sliding pin 561 stress, the active force that it is subject to is shared jointly by left side and right side support 22,24, decreases single being subject to The active force that bears required for power body (left side brackets 22 or right side support 24) is it is ensured that the stability of anastomat 100 structure.

As preferred embodiment, this second sliding pin 561 is the pivot connecting nail bin push rod 54 and front rod 562 Axle, so, the original structure that this second sliding pin 561 substantial use of in anastomat 100 carries out improvement design, it is to avoid increase Plus the complexity of anastomat 100 structure, certainly, in the embodiment replaced, the second sliding pin 561 can also be not designed to Connect the pivotal axis of nail bin push rod 54 and front rod 562, and be set and be connected at other correct positions on nail bin push rod 54.

First sliding tray 542 is additionally provided with nail bin push rod 54, supporting construction 20 is connected with and is adapted to the first sliding tray 542 The first sliding pin 544, this first sliding tray 542 and the second sliding tray 228,246 be set parallel to each other, and specifically, left side is propped up Installing hole 226,244 is respectively arranged with frame 22 and right side support 24 to fix this first sliding pin 544, the first sliding pin 544 It is slidably matched through the first sliding tray 542 and with it.So, two parts are included to nail in the anastomat 100 of present embodiment The structure that the sliding path of storehouse push rod 54 is defined, is the first sliding tray 542 and the first sliding pin being fitted to each other respectively 544 and second sliding tray the 228,246 and second sliding pin 561, and, the second sliding pin 561 is with respect to the first sliding tray 542 more adjacent to the near-end of anastomat 100.

During anastomat 100 closure, it is oblique that front rod 562 can apply one to nail bin push rod 54 when itself pivots On thrust, the second sliding pin 561 on nail bin push rod 54 be subject to dynamicly by this thrust obliquely upwards the component of part make For the top of the second sliding tray 228,246 in left side brackets 22 and right side support 24, and with the second sliding tray 228,246 The counterforce counteraction that top applies to the second sliding pin 561.Because the second sliding tray 228,246 is along nail bin groupware 32 side of moving To extension, and the first sliding tray 542 is parallel to each other with the second sliding tray 228,246, therefore, current connecting rods 562 promote the second slip Pin 561 along the bearing of trend of the second sliding tray 228,246 move when, also limit the nail bin being connected with the first sliding pin 544 Move in the direction that push rod 54 is limited along the first sliding tray 542, the first sliding tray on the first sliding pin 544 and nail bin push rod 54 Frictional force now will not be produced due to conflict between 542, also just solve produced problem in prior art.Meanwhile, front company Bar 562 passes through to drive the second sliding pin 561 to move it is ensured that tying in the second sliding tray 228,246 of left and right support 22,24 The stability of structure and rigidity are it is ensured that apparatus can smoothly close under thick tissue state.The closure making anastomat 100 is experienced more Good, and further increase the structural stability of anastomat 100.

In above-mentioned embodiment, the first sliding tray 542 and the second sliding tray 228,246 are all kidney slot to optimize each other Matching relationship with the first sliding pin 544 and the second sliding pin 561.

Anastomat 100 also includes an anti-overflow needle assembly, this anti-overflow needle assembly include an anti-overflow pin push rod 62, connect anti-overflow The actuator push rod 64 of pin push rod 62, and the anti-overflow pin 61(being arranged in nail bin groupware 32 joins shown in Fig. 2), anti-overflow pin 61 with pass Dynamic push rod 64 linkage ground connects.

Ginseng Fig. 5 to Fig. 8, in an embodiment of the present invention, this anti-overflow pin push rod 62 is set to saddle type, and it is provided with near-end Symmetrical operating portion 626, operating portion 626 projects housing 10 and arranges.Anti-overflow pin push rod 62 also include respectively with left side brackets 22 and Right side support 24 two opposing surface cooperation left connecting rod arm 622 and right connecting rod arm 624, when anastomat 100 in original state, hit When hair-like state and percussion completion statuses, the projection in its axial direction of above-mentioned the second sliding pin 561 and left connecting rod arm 622 and the right side Pitman arm 624 has lap.That is, during the use of anastomat 100, the two ends of the second sliding pin 561 will not be worn Cross the second sliding tray 228,246 and be sliding out outside supporting construction 20.

Specifically, as Fig. 6 situation, now illustrate the situation of unassembled anti-overflow pin push rod 62, the second sliding pin 561 can lead to Cross the second sliding tray 228,246 and be sliding out supporting construction 20；Fig. 7 and Fig. 8 is and to be hit in original state with anastomat 100 respectively When sending out completion statuses, 561 cooperation situations of anti-overflow pin push rod 62 and the second sliding pin, by left connecting rod arm 622 and right connecting rod arm 624 Support, the second sliding pin 561 can not slip from the second sliding tray 228,246.Especially, when anastomat 100 is in initial shape When state, cock and percussion completion statuses, the two ends of this second sliding pin 561 are held in left connecting rod arm 622 and rear company respectively On lever arm 624, so, left connecting rod arm 622 and right connecting rod arm 624 also limit the displacement in its axial direction of the second sliding pin 561 Possibility.

Anti-overflow needle assembly also includes the rotating crank 66 being connected with anti-overflow pin push rod 62.Rotating crank 66 is pivotally connected In support 20, it is movably connected on nail bin push rod 54 simultaneously.By the operating portion of anti-overflow pin push rod 62, can by anti-overflow pin push rod 62 from The proximate propulsion of anastomat 100, meanwhile, when advancing anti-overflow pin push rod 62, the actuator push rod 64 that also can link is to far-end Motion, thus associatedly promote anti-overflow pin 61 to anastomat distal movement.

The operating process in Jia Bi physiological tissue for the anastomat 100 in an embodiment of the present invention is as follows:

Under the original state of anastomat 100, front rod 562 and back link 564 are in that an angle being less than 180 degree sets each other Put, and front rod 562 is held in the supporting part 522 in percussion handle 52 with back link 564 connecting portion.

When needing Jia Bi physiological tissue, first physiological tissue can be positioned over nail anvil face and the nail bin groupware of nail-anvil assembly 34 Between 32 nail bin face, then, anti-overflow pin push rod 62 is promoted to move to anastomat far-end, thus link push rod 64 and anti-overflow pin 61 Move to the far-end of anastomat, so that anti-overflow pin 61 stretches out from nail bin groupware 32 and final and nail-anvil assembly 34 is provided with Receptacle (sign) coordinates, the opening between closing nail-anvil assembly 34 and nail bin groupware 32, namely closes opening of nail anvil seat 30 Mouthful.

Then, percussion handle 52 is driven pivotally to rotate towards gripping handle 40, now, supporting part 522 can connect before supporting Bar 562 and the connecting portion of back link 564, make front rod 562 and back link 564 be pivoted relative to each other with being forced to and towards trend increase two The state motion of angle between person.

In an embodiment of the present invention, front rod 562 can supported portion 522 be driven to folder in bigger with back link 564 Relatively stablize mated condition in 180 degree angle, and be finally held in the support division 224 in supporting construction 20, now front rod 562 Move to interference state with back link 564.

In the process, the distance limiting between the near-end of the far-end of front rod 562 and back link 564 is gradually increased to Slightly reduce again after big distance, because one end of back link 564 is fixed in supporting construction 20, the far-end of front rod 562 is real Now drive nail bin push rod 54 towards the distal movement of anastomat, the driving force that nail bin push rod 54 acts on nail bin groupware 32 makes to follow closely Storehouse assembly 32 be forced to close to nail-anvil assembly 34, thus clamping physiological tissue.

In an embodiment of the present invention, percussion assembly 50 also includes an ejector pin bar 58, and it is slidably fit into nail In storehouse push rod 54, the surface that ejector pin bar 58 is acted on knife rest 326 is made as the shape fitting each other.

In present embodiment, the cross section of ejector pin bar 58 is curved.

One wedged plate 524 is connected with percussion handle 52, this wedged plate 524 can be assemblied in nail bin push rod at least in part To realize the interaction with ejector pin bar 58 in 54.

The operating process when cutting and suture physiological tissue for the anastomat 100 in an embodiment of the present invention is as follows:

After completing the operation of above-mentioned Jia Bi physiological tissue, percussion handle 52 court under the drive of handle return spring (not shown) Direction away from gripping handle 40 rotates and realizes automatically reseting of percussion handle 52.

In the process, the wedged plate 524 in percussion handle 52 is triggered and is held on ejector pin bar 58, now, then passes through Percussion handle 52 is pivoted towards the direction of gripping handle 40, makes wedged plate 524 promote ejector pin bar 58 remote to anastomat End motion, to realize firing to while cutting knife 328 and pushing slice of nail 324, pushing slice of nail 324 promotes the suture in staple containing groove Clench on physiological tissue, cutting knife 328 cuts to corresponding physiological tissue simultaneously.

The near-end of ejector pin bar 58 has the holding part 582 extending outside nail bin push rod 54, and percussion assembly also includes one It is connected to the reseting elastic element 59 between this holding part 582 and supporting construction 20, in an embodiment of the present invention, reset bullet Property element 59 be an extension spring.

During percussion, reseting elastic element 59 is in extended state, and the percussion completion statuses of anastomat, it is After physiological tissue has been carried out cutting and suturing, ejector pin bar 58 is retracted in the presence of itself pulling force by reseting elastic element 59, Meanwhile, the state knife rest 326 being provided with cutting knife 328 being retracted.

After anastomat reaches percussion completion statuses, can be by pressing button release 70, to open the nail bin groupware 32 of closure With nail-anvil assembly 34.

In an embodiment of the present invention, button release 70 is movably connected in supporting construction 20 by a button release pin 702, And, the near-end of back link 564 can also by with this button release pin 702 connect realize relative solid with supporting construction 20 Fixed.

The far-end of button release 70 have can with back link 564 effect support end 704, during pressing button release 70, this supports End 704 can drive front rod 562 and back link 564 towards the state motion being formed less than 180 degree angle, is this front rod 562 With moved beneath from the connecting portion of this back link 564 to anastomat, relative between front rod 562 and back link 564 to destroy Stable mated condition, and then nail bin push rod 54 and nail bin groupware 32 are returned to opposite proximal end, thus by apparatus from Surgery Position is taken out.

Certainly, if desired reuse this anastomat, new nail bin groupware 32 and/or nail-anvil assembly 34 can be replaced, from And carry out the cutting suture of next time.

During the percussion of the Medical stapler 100 of the present invention, nail is acted on by the front rod 562 in percussion assembly 40 The nail bin pushrod movement path position limiting structure that the thrust of the diagonal upward direction of storehouse push rod 31 is fitted to each other, i.e. the second sliding tray 228th, 246 and second sliding pin 561 jointly share and eliminate it is ensured that the rigidity of anastomat 100 structure and closure when steady Qualitative, and, improve anastomat 100 closure impression it is ensured that closure compared with thick tissue when exploitativeness.

It should be understood that although this specification is been described by according to embodiment, but not each embodiment only comprises one Individual independent technical scheme, only for clarity, those skilled in the art should will say this narrating mode of description As an entirety, the technical scheme in each embodiment can also be through appropriately combined, and forming those skilled in the art can for bright book With the other embodiment understanding.

The a series of detailed description of those listed above is only for the feasibility embodiment of the present invention specifically Bright, they simultaneously are not used to limit the scope of the invention, all equivalent implementations made without departing from skill spirit of the present invention Or change should be included within the scope of the present invention.

Claims

1. a kind of Medical stapler, including percussion assembly, nail anvil seat, nail-anvil assembly, nail bin groupware and supporting construction, described hits Send out assembly and include nail bin push rod, front rod and back link, described nail bin push rod and back link respectively with described front rod pivot Connect, described nail bin push rod is provided with the first sliding tray, described supporting construction is connected with and is adapted to described first sliding tray First sliding pin, described percussion assembly pass through described front rod and back link be pivoted relative to each other changes the far-end of described front rod with The distance between near-end of back link, and and then drive described nail bin push rod to limit along described first sliding tray and the first sliding pin Path move it is characterised in that second sliding tray parallel with described first sliding tray, institute are provided with described supporting construction State and the second sliding pin being adapted to described second sliding tray is connected with nail bin push rod.

2. Medical stapler according to claim 1 is it is characterised in that described second sliding pin is to connect described nail bin to push away Bar and the pivotal axis of front rod.

3. Medical stapler according to claim 1 and 2 is it is characterised in that what described supporting construction included being oppositely arranged Left side brackets and right side support, described second sliding tray is correspondingly formed in described left side brackets and right side support.

4. Medical stapler according to claim 3 is it is characterised in that described anastomat also includes anti-overflow pin push rod, institute State anti-overflow pin push rod and include left connecting rod arm and the right company with described left side brackets and two opposing surface cooperations of right side support respectively Lever arm, wherein, when described anastomat is in original state, cock and percussion completion statuses, described second sliding pin is at it Projection in axial direction has lap with described left connecting rod arm and right connecting rod arm.

5. Medical stapler according to claim 4 is it is characterised in that work as described anastomat in original state, percussion shape When state and percussion completion statuses, the two ends of described second sliding pin are held on described left connecting rod arm and right connecting rod arm respectively.

6. Medical stapler according to claim 1 is it is characterised in that described second sliding pin relatively described first slides Groove is more adjacent to the near-end of described anastomat.

7. Medical stapler according to claim 1 is it is characterised in that described second sliding tray is kidney slot.

8. a kind of Medical stapler, including percussion assembly, nail anvil seat, nail-anvil assembly, nail bin groupware and supporting construction, described hits Send out assembly and include the nail bin push rod being slidably connected with described supporting construction it is characterised in that being provided with described supporting construction certainly The second sliding tray that the proximate of described anastomat extends, described nail bin push rod is connected with and is fitted with described second sliding tray The second sliding pin joined.

9. Medical stapler according to claim 8 is it is characterised in that described supporting construction includes the left side being oppositely arranged Support and right side support, described second sliding tray is correspondingly formed in described left side brackets and right side support.

10. Medical stapler according to claim 9 is it is characterised in that described anastomat also includes anti-overflow pin push rod, institute State anti-overflow pin push rod and include left connecting rod arm and the right company with described left side brackets and two opposing surface cooperations of right side support respectively Lever arm, wherein, when described anastomat is in original state, cock and percussion completion statuses, described second sliding pin is at it Projection in axial direction has lap with described left connecting rod arm and right connecting rod arm.

11. Medical staplers according to claim 10 are it is characterised in that work as described anastomat in original state, percussion When state and percussion completion statuses, the two ends of described second sliding pin are held on described left connecting rod arm and right connecting rod arm respectively.

12. Medical staplers according to claim 8 are it is characterised in that described percussion assembly includes nail bin push rod, front company Bar and back link, described nail bin push rod and back link are pivotally connected with described front rod respectively, and described percussion assembly passes through institute State the distance between the near-end changing the far-end of described front rod and back link that is pivoted relative to each other of front rod and back link, and and then Drive described nail bin push rod described supporting construction relatively to slide, wherein, described second sliding pin be connect described nail bin push rod and The pivotal axis of front rod.

13. Medical staplers according to claim 8 are it is characterised in that described second sliding tray is kidney slot.