CN103418049A - Needleless connector - Google Patents
Needleless connector Download PDFInfo
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- CN103418049A CN103418049A CN2012103105631A CN201210310563A CN103418049A CN 103418049 A CN103418049 A CN 103418049A CN 2012103105631 A CN2012103105631 A CN 2012103105631A CN 201210310563 A CN201210310563 A CN 201210310563A CN 103418049 A CN103418049 A CN 103418049A
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- plunger portion
- housing
- cavity
- reset
- sidewall
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Abstract
The invention discloses a needleless connector. The needleless connector comprises a casing and an elastic member. The casing is provided with a cavity, an inlet and an outlet, the elastic member is arranged inside the cavity of the casing and comprises a piston portion and a reset portion, and the bottom of the piston portion is connected with the reset portion; the position close to the top surface of the piston portion is provided with a cavity; the piston portion can move from a first position to a second position, when in the first position, the piston portion can close and seal the inlet, and when the piston portion is in the second position, fluid inflowing from the inlet flows into the outlet through the cavity of the casing; the reset portion is used for resetting the piston portion to the first position. The needleless connector can achieve medicine feeding through a needleless fluid medicine injection device and is easy to disinfect.
Description
Technical field
The present invention relates to medical apparatus and instruments, relate in particular to a kind of needleless joint.
Background technology
At present, while needing to be infused in the infusion process prolonged and repeatedly, be generally will enter venous detaining needle in human vein or inlying catheter and injecting liquid drug equipment by joint to interconnect, thereby realize dosing.Tradition is could realize dosing by acupuncture with the shortcoming of the joint of latex barrier film, due to the latex barrier film by needle pierces after, the pollutant of syringe needle and rubber scraps can enter medicinal liquid, and enter human body with medicinal liquid, thereby have caused great potential safety hazard to patient's health.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of needleless joint, and this needleless joint adopts can not realize dosing with the injecting liquid drug equipment of pin, and is easy to sterilization.
The technical solution adopted in the present invention is: a kind of needleless joint comprises:
Housing, this housing has cavity, entrance and outlet;
Flexible member, be arranged in the cavity of housing; This flexible member comprises plunger portion and reset portion; The bottom of plunger portion is connected with reset portion, and plunger portion is provided with cavity in the position of the end face near plunger portion; Plunger portion can move to the second position from primary importance; When plunger portion, during in primary importance, plunger portion is closed and sealed entry, and when plunger portion, during in the second position, the liquid flowed into from entrance is through the cavity flow inlet/outlet of housing; Reset portion is for being returned to primary importance by plunger portion.
The invention has the beneficial effects as follows:
1. when using needleless joint of the present invention, directly with not with the injecting liquid drug equipment top compression elasticity element of syringe needle, the plunger portion that makes flexible member moves to the second position by the primary importance of sealed entry, the medicinal liquid be added into flows into the outlet of needleless joint by the entrance of needleless joint, after dosing, extract injecting liquid drug equipment out, the plunger portion of flexible member is recovered again sealing state, thereby reached the purpose of Needleless dosing, avoided the pollutant of syringe needle and rubber scraps to pollute medicinal liquid;
2. when plunger portion during the state in sealed entry, the end face of this plunger portion flushes with the end face of housing, thereby is convenient to disinfect;
3. of the present invention simple in structure, low cost of manufacture;
4. flexible member of the present invention adopts silica gel or thermoplastic elastomer (TPE) manufacture, is convenient to use together in conjunction with the antibacterial material, and is suitable for applying the occasion of MRI.
The accompanying drawing explanation
Fig. 1 is the cross-sectional schematic of needleless joint according to an embodiment of the invention, and wherein, plunger portion is in primary importance.
Fig. 2 is the cross-sectional schematic of the A-A direction of Fig. 1.
Fig. 3 is the cross-sectional schematic of needleless joint according to an embodiment of the invention, and wherein, plunger portion is in the second position.
Fig. 4 is the axonometric chart of the flexible member of needleless joint according to an embodiment of the invention.
Fig. 5 is the axonometric chart of needleless joint according to another embodiment of the present invention.
Fig. 6 is the cross-sectional schematic of needleless joint according to another embodiment of the present invention, and wherein, plunger portion is in primary importance.
Fig. 7 is the cross-sectional schematic according to the needleless joint of further embodiment of this invention, and wherein, plunger portion is in primary importance.
Fig. 8 is the cross-sectional schematic of the A-A direction of Fig. 7.
Fig. 9 is the cross-sectional schematic according to the needleless joint of further embodiment of this invention, and wherein, plunger portion is in the second position.
Figure 10 is the cross-sectional schematic of the A-A direction of Fig. 9.
Figure 11 is the axonometric chart according to the flexible member of the needleless joint of further embodiment of this invention.
Figure 12 is the cross-sectional schematic of needleless joint according to yet another embodiment of the invention, and wherein, plunger portion is in primary importance.
The specific embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
With reference to figure 1 and Fig. 2.Needleless joint comprises housing 1 and flexible member 2 according to an embodiment of the invention.Housing 1 comprises upper cover 11 and pedestal 12, and upper cover 11 and pedestal 12 are tightly connected, and jointly surrounds the cavity 10 of housing.The entrance 3 that upper cover 11 comprises upper cover body 111 and is arranged on the upper end of upper cover body.The outlet 4 that pedestal 12 comprises base body 121 and is arranged on the base body lower end.Preferably, in entrance 3 and outlet 4, at least one is joint for pipe.More preferably, in entrance 3 and outlet 4, at least one is the standard Luer joint.In the example of Fig. 1 and Fig. 2, flexible member 2, entrance 3, export 4 and the centrage of cavity 10 all coaxial with the centrage 51 of housing 1.Entrance 3 and outlet 4 form by pipe, and entrance 3 is a female female Luer, export 4 for columniform straight tube.
Shown in Fig. 4.Flexible member 2 comprises plunger portion 21 and reset portion 22.The bottom of plunger portion 21 is connected with reset portion 22.Plunger portion 21 is provided with cavity in the position of the end face 211 near plunger portion.In the example shown in Fig. 1 to Fig. 4, this cavity is for laterally to run through the through hole 210 of two opposite flanks of plunger portion 21, and the shape of cross section of this through hole is rhombus.In another embodiment, this cavity can be also an end opening in the side of plunger portion and other end blind bore.The shape of cross section in hole, except rhombus, can be also oval, circular etc.Also be provided with a pair of groove 213,214 on two of plunger portion relative sides, this pair of groove 213,214 is positioned at the below of the through hole 210 of plunger portion.
In the example shown in Fig. 1 to Fig. 4, reset portion 22 comprises a pair of elastic arm 223,224, this a pair of elastic arm 223,224 is arranged at the both sides (for example left side and right side) of base 221 symmetrically, for example, has the gap 13,14 that allows liquid to pass through between the sidewall 101 of the other both sides of base 221 (front side and rear side) and housing cavity 10.Elastic arm roughly is inverted L-shaped, comprises vertical edge section and cross edge.The lower end of the vertical edge section 2231,2241 of elastic arm 223,224 is connected with base 221, upper end is connected with an end of the cross edge 2232,2242 of elastic arm 223,224, the sidewall of the inner surface of base body 121 is close to respectively by the vertical edge section 2231,2241 of elastic arm 223,224, be beneficial to lead and be difficult for producing the component except axial force, the cross edge 2232,2242 of elastic arm 223,224 is fixed between the top of the bottom of upper cover 11 and pedestal 12 by modes such as heat seal, assemblings.The periphery wall of base body 121 is provided with annular flange flange 122 in the position near the base body end face, and the bottom supporting of upper cover body 111 is also heat seal connection on the end face of this annular flange flange 122.The inner surface 113 of the wall 112 of upper cover body 111 has a ring-shaped step 114 in the position near upper cover body bottom surface, in the middle of the end face 124 of this ring-shaped step 114 and base body is clipped in the cross edge of elastic arm 223,224 2232,2242.Also be respectively equipped with the hook portion 2233,2243 of downward bending at the other end of the cross edge 2232,2242 of elastic arm 223,224, hook portion 2233,2243 is maintained between the outer peripheral face on the inwall of lower end of upper cover body 111 and base body 121 tops.Above-mentioned fixed form can guarantee that flexible member 2 is firmly fixed.
As depicted in figs. 1 and 2, when plunger portion 21, during in primary importance, plunger portion 21 is closed and sealed entry 3, and the end face 211 of plunger portion 21 flushes with the end face 31 of entrance 3, thereby is convenient to disinfect.In the example of Fig. 1 to Fig. 4, plunger portion 21 comprises head 215 and expansion section 216, and the bottom of head 215 is connected with 216De top, expansion section, and 216De upper end, expansion section has the shoulder 217 of a truncated cone-shaped, 216De lower end, expansion section is gradually-reducing shape, and is connected with the base 221 of reset portion 22.The sidewall on head 215 tops is provided with sealing ring 219, and sealing ring 219 forms sealing with the inner surface of entrance 3; The inner surface 113 of the wall 112 of upper cover body 111 is provided with the shoulder 117 of a truncated cone-shaped, and truncated cone-shaped shoulder 217 contacts of expansion section 216, on the truncated cone-shaped shoulder 117 of shell inner surface, form sealing.
With reference to figure 3.When the end face of plunger portion 21 is pushed by the female Luer of the outside injecting liquid drug equipment 7 such as syringe, plunger portion 21 moves down, and in addition, because through hole 210 can produce distortion under pressure, volume diminishes, thereby plunger portion 21 end faces are produced, subsides.Meanwhile, plunger portion 21 transfers the pressure on reset portion 22, causes the vertical edge section 2231,2241 of a pair of elastic arm 223,224 of reset portion to stretch elongated.When plunger portion 21 moves to the second position, as shown in Figure 3, plunger portion 21 moves under entrance 3, and the end face of plunger portion 21 caves in, sealing between the truncated cone-shaped shoulder 217 of the sealing between the inner surface of sealing ring 219 and entrance 3 and expansion section 216 and the truncated cone-shaped shoulder 117 of upper cover body internal surface is all opened, medicinal liquid from entrance 3 inputs, through hole 106 on the liquid flow path that space between the inwall of process housing 1 and the outer wall of flexible member 2 forms and the bottom surface 105 that is opened in cavity 10, flow into outlet 4, then enter with export 4 other conduits of the inlying catheter be connected in, complete the process of clinical transfusion, the flow direction of liquid as shown by arrows in FIG..When the through hole 210 of aforesaid diamond shaped makes plunger portion 21 be forced into the second position, be more prone to form fluid path, and a pair of groove 213,214 be arranged on plunger portion 21 is conducive to the distortion of plunger portion end face and the formation of fluid path.
After external female Luer is screwed out, under the effect of the elastic-restoring force of reset portion 22, plunger portion 21 springs back to primary importance, again entrance 3 is closed and is sealed, and flexible member 2 restores to the original state.
For meet the demand carry multiple-medicinal-liquid simultaneously, in Fig. 5 and embodiment illustrated in fig. 6, housing 1 be provided with arm 6 laterally inclinedly, arm 6 is communicated with the cavity 10 of housing 1.Only show an arm in figure, also can in the side of housing 1, a plurality of arms be set according to the requirement of transfusion.Arm 6 can be integrally formed with housing 1.
Fig. 7 to Figure 11 shows an alternative embodiment of the invention.The main distinction of this embodiment and last embodiment is that the structure of reset portion is different.The reset portion 22a of flexible member 2a is bearing on the bottom surface 105 of housing cavity 10, and bottom surface described herein is not limited to the plane shown in figure, can be also boss or groove.The two opposite side walls of reset portion bottom is against on the sidewall of housing cavity, and this reset portion is the meeting lateral magnification when being subject to axial compressive force; When plunger portion 21a moves to the second position, be positioned at the part of two relative sidewalls of reset portion of top, this reset portion bottom because lateral magnification is against on the sidewall of housing cavity, thereby can prevent the skew of reset portion, guaranteeing provides the elastic reset power made progress to plunger portion 21.
As shown in the figure, reset portion 22a comprises body 225 and support portion 226, and the top of body 225 is connected with the bottom of plunger portion 21a, and the bottom of body 225 is connected with 226De top, support portion.Body 225 is cylindrical, and is provided with a circular central through hole 227, and the central axis 52 of this body is mutually vertical with the axis of housing 51.Support portion 226 is the dome arc, and two relative sidewalls 2261,2262 that this support portion 226 is supported on the 226De bottom, 105Shang， support portion, bottom surface of housing cavity 10 are against on the sidewall 101 of housing cavity.In other embodiment, the shape of body 225 is such as also being designed to ellipse, rhombus etc.Perhaps, the global shape of reset portion 22a is downward opening parabola (not shown).
As shown in Figure 7 and Figure 8, as plunger portion 21a, during in primary importance, plunger portion 21a closes and sealed entry 3, and the end face of plunger portion 21a flushes with the end face of entrance 3.In the example of Fig. 7 to Fig. 9, plunger portion 21a comprises head 215a and expansion section 216a, and the bottom of head 215a is connected with the top of expansion section 216a, and expansion section 216a is truncated cone-shaped.The sidewall on head 215a top is provided with sealing ring 219a, and the inner surface of sealing ring 219a and entrance 3 forms sealing; The inner surface 113 of the wall 112 of upper cover body 111 is provided with the shoulder 117 of a truncated cone-shaped, and the side face contact of expansion section 216a, on the truncated cone-shaped shoulder 117 of shell inner surface, forms sealing.
With reference to figure 9 and Figure 10.When the end face of plunger portion 21a is pushed by the female Luer of the outside injecting liquid drug equipment 7 such as syringe, plunger portion 21a moves down, in addition, and because through hole 210a can produce distortion under pressure, volume diminishes, thereby plunger portion 21a end face is produced, subsides.Meanwhile, it is upper that plunger portion 21a transfers the pressure to reset portion 22a, causes body 225 and support portion 226 to be crushed, and two relative arc sections 2251,2252 of body 225 are to the both sides lateral magnification.When plunger portion 21a moves to the second position, as shown in Figure 9 and Figure 10, 225 two relative sidewalls 2253 of body, a part of 2253a of 2254, 2254a is against respectively on the sidewall 101 of housing cavity 10, plunger portion 21a moves under entrance 3, the end face of plunger portion 21a caves in, sealing between the truncated cone-shaped shoulder 217 of sealing between the inner surface of sealing ring 219a and entrance 3 and expansion section 216a and the truncated cone-shaped shoulder 117 of shell inner surface is all opened, and the medicinal liquid of inputting from entrance 3, through hole 106 on the liquid flow path that space between the inwall of process housing 1 and the outer wall of flexible member 2a forms and the bottom surface 105 that is opened in cavity 10, flow into outlet 4, then enter with export 4 other conduits of the inlying catheter be connected in, complete the process of clinical transfusion, the flow direction of liquid as shown by arrows in FIG..
After external female Luer is screwed out, under the effect of the elastic-restoring force of reset portion 22a, plunger portion 21a springs back to primary importance, again entrance 3 is closed and is sealed, flexible member 2a reinstatement.
For being shaped as downward opening parabolical reset portion, same, this reset portion is bearing on the bottom surface of housing cavity, and the two opposite side walls of reset portion bottom is against on the sidewall of housing cavity; When plunger portion moves to the second position, due to the cause of lateral magnification, a part that is positioned at the reset portion two opposite side walls of top, reset portion bottom has also arrived on the sidewall of housing cavity.
For meet the demand carry multiple-medicinal-liquid simultaneously, in embodiment illustrated in fig. 12, housing 1 be provided with arm 6 laterally inclinedly, arm 6 is communicated with the cavity 10 of housing 1.
The present invention coordinates transfusion catheter or syringe to use clinically.Entrance can connect the female Luer of syringe, transfusion device, tee T etc., and outlet can connect the conduit that inserts human vas.This needleless joint can also be carried plurality of liquid simultaneously.
The description of the present embodiment combines specific embodiment, but it should be understood by one skilled in the art that the present invention is not limited to embodiment described here, and can carry out various modifications and variations and do not deviate from the spirit and scope of the present invention.
Claims (10)
1. a needleless joint, is characterized in that, comprising:
Housing, this housing has cavity, entrance and outlet;
Flexible member, be arranged in the cavity of housing; This flexible member comprises plunger portion and reset portion; The bottom of described plunger portion is connected with described reset portion, and described plunger portion is provided with cavity in the position of the end face near plunger portion; Plunger portion can move to the second position from primary importance; When plunger portion, during in described primary importance, described entrance is closed and sealed to plunger portion, and when plunger portion, during in the described second position, the liquid flowed into from described entrance flows into described outlet through the cavity of housing; Described reset portion is for being returned to described primary importance by plunger portion.
2. needleless joint as claimed in claim 1, is characterized in that, described housing comprises upper cover and pedestal, and described upper cover and described pedestal are tightly connected; Described entrance is arranged on described and covers, and described outlet is arranged on described pedestal.
3. needleless joint as claimed in claim 1 or 2, is characterized in that, the reset portion of described flexible member comprises base and at least two elastic arms;
Described base is connected with the bottom of described plunger portion, has the gap that allows liquid to pass through between the sidewall of the side face of this base and housing cavity;
One end of each elastic arm is connected with base, and the other end is fixed on the sidewall of housing cavity.
4. needleless joint as claimed in claim 2, is characterized in that, the reset portion of described flexible member comprises base and a pair of elastic arm;
Described base is connected with the bottom of described plunger portion, and described a pair of elastic arm is arranged at the both sides of base symmetrically; There is the gap that allows liquid to pass through between the other both sides of this base and the sidewall of housing cavity;
Each elastic arm comprises vertical edge section and cross edge, the lower end of the vertical edge section of elastic arm is connected with described base, upper end is connected with an end of the cross edge of elastic arm, and the sidewall of housing cavity is close to by the vertical edge section of elastic arm, and the cross edge of elastic arm is fixed between the top of the bottom of upper cover and pedestal.
5. needleless joint as claimed in claim 1, is characterized in that, the reset portion of described flexible member is bearing on the bottom surface of housing cavity, and the two opposite side walls of reset portion bottom is against on the sidewall of housing cavity;
This reset portion can lateral magnification when being subject to axial compressive force, when described plunger portion moves to the described second position, is positioned at the part of reset portion two opposite side walls of top, reset portion bottom because lateral magnification is against on the sidewall of housing cavity.
6. needleless joint as claimed in claim 1, is characterized in that, the reset portion of described flexible member comprises body and support portion, and the top of described body is connected with the bottom of plunger portion, and the bottom of body is connected with the top of support portion;
Described body is cylindrical, and is provided with a central through hole, and the central axis of this body is mutually vertical with the axis of housing;
Described support portion is the dome arc, and two relative sidewalls of bottom that this support portion is supported on the Shang，Gai support portion, bottom surface of housing cavity are against on the sidewall of housing cavity;
When described plunger portion moves to the described second position, the part of two opposing sidewalls of body is against on the sidewall of housing cavity.
7. needleless joint as claimed in claim 1, is characterized in that, when described plunger portion, during in described primary importance, the end face of this plunger portion flushes with the end face of described entrance.
8. needleless joint as claimed in claim 1, is characterized in that,
The material of described flexible member is silica gel, thermoplastic elastic body.
9. needleless joint as claimed in claim 1, is characterized in that, on two of described plunger portion relative sides, is respectively equipped with groove, and this groove is positioned at the below of the cavity of plunger portion.
10. needleless joint as claimed in claim 1, is characterized in that, in described entrance and described outlet, at least one is joint for pipe;
The side of described housing is provided with arm, and described arm is communicated with the cavity of described housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210310563.1A CN103418049B (en) | 2012-08-29 | 2012-08-29 | Needleless joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210310563.1A CN103418049B (en) | 2012-08-29 | 2012-08-29 | Needleless joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103418049A true CN103418049A (en) | 2013-12-04 |
| CN103418049B CN103418049B (en) | 2016-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210310563.1A Active CN103418049B (en) | 2012-08-29 | 2012-08-29 | Needleless joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103418049B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104815364A (en) * | 2015-04-30 | 2015-08-05 | 苏州林华医疗器械有限公司 | Needleless connection piece |
| CN105148359A (en) * | 2015-07-27 | 2015-12-16 | 昆山安卓精密模具有限公司 | Pressure-resistant needle-free connector |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5509433A (en) * | 1993-10-13 | 1996-04-23 | Paradis; Joseph R. | Control of fluid flow |
| US5569235A (en) * | 1994-06-21 | 1996-10-29 | Modern Medical Devices | Valve and valved container for use with a syringe fitting |
| US6855138B2 (en) * | 2003-07-08 | 2005-02-15 | Hsi-Chin Tsai | Injection joint for an intravenous (IV) device tube |
| CN1802183A (en) * | 2002-12-31 | 2006-07-12 | 卡迪纳尔健康303公司 | Self-sealing male luer connector with biased valve plug |
| CN201768265U (en) * | 2010-07-08 | 2011-03-23 | 潘秀凤 | Spherical type medicine feeder |
| CN202822287U (en) * | 2012-08-29 | 2013-03-27 | 美昕医疗器械(昆山)有限公司 | Needles-free joint |
-
2012
- 2012-08-29 CN CN201210310563.1A patent/CN103418049B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5509433A (en) * | 1993-10-13 | 1996-04-23 | Paradis; Joseph R. | Control of fluid flow |
| US5569235A (en) * | 1994-06-21 | 1996-10-29 | Modern Medical Devices | Valve and valved container for use with a syringe fitting |
| CN1802183A (en) * | 2002-12-31 | 2006-07-12 | 卡迪纳尔健康303公司 | Self-sealing male luer connector with biased valve plug |
| US6855138B2 (en) * | 2003-07-08 | 2005-02-15 | Hsi-Chin Tsai | Injection joint for an intravenous (IV) device tube |
| CN201768265U (en) * | 2010-07-08 | 2011-03-23 | 潘秀凤 | Spherical type medicine feeder |
| CN202822287U (en) * | 2012-08-29 | 2013-03-27 | 美昕医疗器械(昆山)有限公司 | Needles-free joint |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104815364A (en) * | 2015-04-30 | 2015-08-05 | 苏州林华医疗器械有限公司 | Needleless connection piece |
| CN104815364B (en) * | 2015-04-30 | 2018-04-20 | 苏州林华医疗器械股份有限公司 | A kind of needleless connector |
| CN105148359A (en) * | 2015-07-27 | 2015-12-16 | 昆山安卓精密模具有限公司 | Pressure-resistant needle-free connector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103418049B (en) | 2016-03-30 |
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