CN202822287U - Needles-free joint - Google Patents
Needles-free joint Download PDFInfo
- Publication number
- CN202822287U CN202822287U CN 201220432281 CN201220432281U CN202822287U CN 202822287 U CN202822287 U CN 202822287U CN 201220432281 CN201220432281 CN 201220432281 CN 201220432281 U CN201220432281 U CN 201220432281U CN 202822287 U CN202822287 U CN 202822287U
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- China
- Prior art keywords
- plunger portion
- housing
- cavity
- plunger
- reset
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- Expired - Fee Related
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- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The utility model discloses a needle-free joint which comprises a casing body provided with a cavity, an inlet and an outlet. An elastic element is arranged in the cavity of the casing body. The elastic element comprises a plunger portion and a reset portion. The bottom of the plunger portion is connected with the reset portion. A cavity is arranged in a place, adjacent to the top of the plunger portion, of the plunger portion. The plunger portion can move from a first position to a second position. When the plunger portion is in the first position, the plunger portion closes and seals the inlet. When the plunger portion is in the second position, liquid entering from the inlet passes through the cavity in the casing body and flows out of the outlet. The reset portion is used for restoring the plunger portion to the first position. The needle-free joint can add medicine with needle-free medicine liquid injection equipment and is easy to disinfect.
Description
Technical field
This utility model relates to medical apparatus and instruments, relates in particular to a kind of needleless joint.
Background technology
At present, when in the infusion process, needing to infuse prolonged and repeatedly, generally be to enter venous detaining needle in the 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, since 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 for patient's health.
Summary of the invention
Technical problem to be solved in the utility model 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 scheme that this utility model adopts is: a kind of needleless joint comprises:
Housing, this housing has cavity, entrance and outlet;
Flexible member is arranged in the cavity of housing; This flexible member comprises plunger portion and reset portion; The bottom of plunger portion links to each other with reset portion, and plunger portion is provided with cavity in the position of the end face of close plunger portion; Plunger portion can move to the second position from primary importance; When plunger portion was in primary importance, plunger portion was closed and sealed entry, when plunger portion is in the second position, passed through the cavity flow inlet/outlet of housing from the liquid of entrance inflow; Reset portion is used for plunger portion is returned to primary importance.
The beneficial effects of the utility model are:
1. when using needleless joint of the present utility model, 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 that is added into flows into the outlet of needleless joint by the entrance of needleless joint, after dosing is complete, 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 was in the state of sealed entry, the end face of this plunger portion flushed with the end face of housing, thereby is convenient to disinfect;
3. of the present utility model simple in structure, low cost of manufacture;
4. flexible member of the present utility model adopts silica gel or thermoplastic elastomer (TPE) manufacturing, is convenient to use together in conjunction with the antibacterial material, and is suitable for using the occasion of MRI.
Description of drawings
Fig. 1 is that wherein, plunger portion is in primary importance according to the cross-sectional schematic of the needleless joint of this utility model one embodiment.
Fig. 2 is the cross-sectional schematic of the A-A direction of Fig. 1.
Fig. 3 is that wherein, plunger portion is in the second position according to the cross-sectional schematic of the needleless joint of this utility model one embodiment.
Fig. 4 is the axonometric chart according to the flexible member of the needleless joint of this utility model one embodiment.
Fig. 5 is the axonometric chart according to the needleless joint of another embodiment of this utility model.
Fig. 6 is the cross-sectional schematic according to the needleless joint of another embodiment of this utility model, and wherein, plunger portion is in primary importance.
Fig. 7 is the cross-sectional schematic according to the needleless joint of the another embodiment of this utility model, 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 the another embodiment of this utility model, 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 the another embodiment of this utility model.
Figure 12 is that wherein, plunger portion is in primary importance according to this utility model cross-sectional schematic of the needleless joint of an embodiment again.
The specific embodiment
Below in conjunction with accompanying drawing this utility model is described in further detail.
With reference to figure 1 and Fig. 2.Needleless joint according to this utility model one embodiment comprises housing 1 and flexible member 2.Housing 1 comprises loam cake 11 and pedestal 12, and loam cake 11 and pedestal 12 are tightly connected, and jointly surrounds the cavity 10 of housing.The entrance 3 that loam cake 11 comprises loam cake body 111 and is arranged on the upper end of loam cake body.The outlet 4 that pedestal 12 comprises base body 121 and is arranged on the base body lower end.Preferably, at least one is joint for pipe in entrance 3 and the outlet 4.More preferably, at least one is the standard Luer joint in entrance 3 and the outlet 4.In the example of Fig. 1 and Fig. 2, the centrage of flexible member 2, entrance 3, outlet 4 and cavity 10 is all coaxial with the centrage 51 of housing 1.Entrance 3 and outlet 4 consist of by pipe, and entrance 3 is a female female Luer, and outlet 4 is columniform straight tube.
In conjunction with shown in Figure 4.Flexible member 2 comprises plunger portion 21 and reset portion 22.The bottom of plunger portion 21 links to each other with reset portion 22.Plunger portion 21 is provided with cavity in the position of the end face 211 of close plunger portion.To example shown in Figure 4, this cavity is for laterally running through the through hole 210 of two opposite flanks of plunger portion 21 at Fig. 1, and the shape of cross section of this through hole is rhombus.In another embodiment, this cavity also can be an end opening in the side of plunger portion and other end blind bore.The shape of cross section in hole also can be oval, circular etc. except rhombus.Also be provided with a pair of groove 213,214 on two of plunger portion relative sides, this a pair of groove 213,214 is positioned at the below of the through hole 210 of plunger portion.
At Fig. 1 to the example shown in Figure 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, has the gap 13,14 that allows liquid to pass through between the sidewall 101 of the other both sides of base 221 (for example front side and rear side) and housing cavity 10.Elastic arm roughly is inverted L-shaped, comprises vertical edge section and cross edge.Elastic arm 223,224 vertical edge section 2231,2241 lower end link to each other with base 221, the upper end links to each other with elastic arm 223,224 cross edge 2232, an end of 2242, the sidewall of the inner surface of base body 121 is close to respectively by elastic arm 223,224 vertical edge section 2231,2241, be beneficial to lead and be difficult for producing component except axial force, elastic arm 223,224 cross edge 2232,2242 are fixed between the top of the bottom of loam cake 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 loam cake 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 loam cake body 111 has a ring-shaped step 114 near the position of loam cake body bottom surface, in the middle of the end face 124 of this ring-shaped step 114 and base body is clipped in elastic arm 223,224 cross edge 2232,2242.Also be respectively equipped with the hook portion 2233,2243 of downward bending at elastic arm 223,224 cross edge 2232,2242 the other end, hook portion 2233,2243 is maintained between the outer peripheral face on the inwall of lower end of loam cake 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 was in primary importance, plunger portion 21 was 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 links to each other with the top of expansion section 216, and the upper end of expansion section 216 has the shoulder 217 of a truncated cone-shaped, the lower end of expansion section 216 is gradually-reducing shape, and links to each other 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 loam cake body 111 is provided with the shoulder 117 of a truncated cone-shaped, and truncated cone-shaped shoulder 217 contacts of expansion section 216 form sealing on the truncated cone-shaped shoulder 117 of shell inner surface.
With reference to figure 3.By such as the female Luer pushing of the outside injecting liquid drug equipment 7 of syringe the time, plunger portion 21 moves down at the end face of plunger portion 21, and in addition, because through hole 210 can produce distortion under pressure, volume diminishes, and subsides thereby plunger portion 21 end faces are produced.Meanwhile, plunger portion 21 transfers the pressure on the reset portion 22, causes a pair of elastic arm 223 of reset portion, 224 vertical edge section 2231,2241 to stretch elongated.When plunger portion 21 moves to the second position, as shown in Figure 3, plunger portion 21 moves under the 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 loam cake 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 consists of 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 that links to each other in, finish the process of clinical transfusion, the flow direction of liquid as shown by arrows in FIG..The through hole 210 of aforesaid diamond shaped is so that plunger portion 21 when being forced into the second position, be more prone to form fluid path, and a pair of groove 213,214 that is arranged on the plunger portion 21 is conducive to the distortion of plunger portion end face and the formation of fluid path.
After external female Luer was screwed out, under the effect of the elastic-restoring force of reset portion 22, plunger portion 21 sprang back to primary importance, again entrance 3 was closed and was sealed, and flexible member 2 restores to the original state.
For satisfying the demand carry simultaneously multiple-medicinal-liquid, 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 among the 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 another embodiment of the present utility model.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 the figure, also can be 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, a part that is positioned at two relative sidewalls of reset portion of this top, reset portion bottom is against on the sidewall of housing cavity owing to lateral magnification, thereby can prevent the skew of reset portion, guaranteeing provides an elastic reset power that makes 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 links to each other with the bottom of plunger portion 21a, and the bottom of body 225 links to each other with the top of support portion 226.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 this support portion 226 is supported on the bottom surface 105 of housing cavity 10, and two relative sidewalls 2261,2262 of the bottom of support portion 226 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, when plunger portion 21a was in primary importance, plunger portion 21a closed 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 links to each other 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 loam cake body 111 is provided with the shoulder 117 of a truncated cone-shaped, and the side face contact of expansion section 216a forms sealing on the truncated cone-shaped shoulder 117 of shell inner surface.
With reference to figure 9 and Figure 10.At the end face of plunger portion 21a by such as the female Luer pushing of the outside injecting liquid drug equipment 7 of syringe the time, plunger portion 21a moves down, in addition, because through hole 210a can produce distortion under pressure, volume diminishes, and subsides thereby plunger portion 21a end face is produced.Meanwhile, plunger portion 21a transfers the pressure on the 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 the 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 from the medicinal liquid of entrance 3 input, 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 consists of 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 that links to each other in, finish the process of clinical transfusion, the flow direction of liquid as shown by arrows in FIG..
After external female Luer was screwed out, under the effect of the elastic-restoring force of reset portion 22a, plunger portion 21a sprang 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 moved to the second position, because the cause of lateral magnification, a part that is positioned at the reset portion two opposite side walls of top, reset portion bottom had also arrived on the sidewall of housing cavity.
For satisfying the demand carry simultaneously multiple-medicinal-liquid, 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.
This utility model cooperates 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 this utility model is not limited to embodiment described here, and can carry out various modifications and variations and do not deviate from spirit and scope of the present utility model.
Claims (10)
1. a needleless joint is characterized in that, comprising:
Housing, this housing has cavity, entrance and outlet;
Flexible member is arranged in the cavity of housing; This flexible member comprises plunger portion and reset portion; The bottom of described plunger portion links to each other with described reset portion, and described plunger portion is provided with cavity in the position of the end face of close plunger portion; Plunger portion can move to the second position from primary importance; When plunger portion was in described primary importance, described entrance is closed and sealed to plunger portion, and when plunger portion was in the described second position, the liquid that flows into from described entrance flowed into described outlet through the cavity of housing; Described reset portion is used for plunger portion is returned to described primary importance.
2. needleless joint as claimed in claim 1 is characterized in that, described housing comprises loam cake and pedestal, and described loam cake and described pedestal are tightly connected; Described entrance is arranged on and covers on described, and described outlet is arranged on the 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 links to each other 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 links to each other 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 links to each other with the bottom of described plunger portion, and described a pair of elastic arm is arranged at the both sides of base symmetrically; Has 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 links to each other with described base, the upper end links to each other 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 loam cake 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 is the meeting lateral magnification when being subject to axial compressive force, and when described plunger portion moved to the described second position, a part that is positioned at the reset portion two opposite side walls of top, reset portion bottom was against on the sidewall of housing cavity owing to lateral magnification.
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 links to each other with the bottom of plunger portion, and the bottom of body links to each other 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 this support portion is supported on the bottom surface of housing cavity, and two relative sidewalls of the bottom of this support portion are against on the sidewall of housing cavity;
When described plunger portion moved to the described second position, the part of two opposing sidewalls of body was against on the sidewall of housing cavity.
7. needleless joint as claimed in claim 1 is characterized in that, when described plunger portion was in described primary importance, the end face of this plunger portion flushed 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, is respectively equipped with groove two of described plunger portion relative sides, 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, at least one is joint for pipe in described entrance and the described outlet;
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 |
|---|---|---|---|
| CN 201220432281 CN202822287U (en) | 2012-08-29 | 2012-08-29 | Needles-free joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220432281 CN202822287U (en) | 2012-08-29 | 2012-08-29 | Needles-free joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202822287U true CN202822287U (en) | 2013-03-27 |
Family
ID=47934099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220432281 Expired - Fee Related CN202822287U (en) | 2012-08-29 | 2012-08-29 | Needles-free joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202822287U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103418049A (en) * | 2012-08-29 | 2013-12-04 | 美昕医疗器械(昆山)有限公司 | Needleless connector |
| CN109041571A (en) * | 2017-04-12 | 2018-12-18 | 光阳产业股份有限公司 | Medical connection structure |
-
2012
- 2012-08-29 CN CN 201220432281 patent/CN202822287U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103418049A (en) * | 2012-08-29 | 2013-12-04 | 美昕医疗器械(昆山)有限公司 | Needleless connector |
| CN109041571A (en) * | 2017-04-12 | 2018-12-18 | 光阳产业股份有限公司 | Medical connection structure |
| CN109041571B (en) * | 2017-04-12 | 2020-11-24 | 光阳产业股份有限公司 | Medical connecting structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20150829 |
|
| EXPY | Termination of patent right or utility model |