CN103418049B - Needleless joint - Google Patents
Needleless joint Download PDFInfo
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- CN103418049B CN103418049B CN201210310563.1A CN201210310563A CN103418049B CN 103418049 B CN103418049 B CN 103418049B CN 201210310563 A CN201210310563 A CN 201210310563A CN 103418049 B CN103418049 B CN 103418049B
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- plunger portion
- housing
- plunger
- reset
- entrance
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Abstract
The invention discloses a kind of needleless joint, 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 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 is in primary importance, plunger portion is closed and sealed entry, and when plunger portion is in the second position, the liquid flowed into from entrance is through the cavity flow inlet/outlet of housing; Reset portion is used for plunger portion to be returned to primary importance.This needleless joint adopts the liquid medicine injecting device not with pin to realize dosing, and is easy to sterilization.
Description
Technical field
The present invention relates to medical apparatus and instruments, particularly relate to a kind of needleless joint.
Background technology
At present, when needing to infuse in infusion process prolonged and repeatedly, be generally by joint, the venous detaining needle entered in human vein or inlying catheter and liquid medicine injecting device are interconnected, thus realize dosing.The shortcoming of the joint of conventional belt latex septum will could realize dosing by acupuncture, because latex septum is by after needle pierces, the pollutant of syringe needle and rubber scraps can enter medicinal liquid, and enter human body with medicinal liquid, thus cause great potential safety hazard to the health of patient.
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 the liquid medicine injecting device not with pin to realize dosing, and is easy to sterilization.
The technical solution adopted in the present invention is: a kind of needleless joint, 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 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 is in primary importance, plunger portion is closed and sealed entry, and when plunger portion is in the second position, the liquid flowed into from entrance is through the cavity flow inlet/outlet of housing; Reset portion is used for plunger portion to be returned to primary importance.
The invention has the beneficial effects as follows:
1. when using needleless joint of the present invention, the liquid medicine injecting device top compression elasticity element of direct use not with syringe needle, the plunger portion of flexible member is made to move 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 liquid medicine injecting device out, the plunger portion of flexible member recovers sealing state again, thus reaching the object of Needleless dosing, the pollutant and the rubber scraps that avoid syringe needle pollute medicinal liquid;
2. when plunger portion is in the state of sealed entry, the end face of this plunger portion flushes with the end face of housing, thus is convenient to disinfect;
3. structure of the present invention is simple, low cost of manufacture;
4. flexible member of the present invention adopts silica gel or thermoplastic elastomer, is convenient to use together in conjunction with antibacterial material, and is suitable for the occasion applying MRI.
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 in 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 of the needleless joint according to further embodiment of this invention, and wherein, plunger portion is in primary importance.
Fig. 8 is the cross-sectional schematic in the A-A direction of Fig. 7.
Fig. 9 is the cross-sectional schematic of the needleless joint according to further embodiment of this invention, and wherein, plunger portion is in the second position.
Figure 10 is the cross-sectional schematic in the A-A direction of Fig. 9.
Figure 11 is the axonometric chart of the flexible member of needleless joint according to 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.
Detailed description of the invention
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.Upper cover 11 comprises upper cover body 111 and is arranged on the entrance 3 of upper end of upper cover body.Pedestal 12 comprises base body 121 and is arranged on the outlet 4 of base body lower end.It is preferred that entrance 3 is joint for pipe with at least one in outlet 4.It is further preferred that entrance 3 is standard luer fittings with at least one in outlet 4.In the example of fig. 1 and 2, flexible member 2, entrance 3, outlet 4 and the centrage of cavity 10 are all coaxial with the centrage 51 of housing 1.Entrance 3 and outlet 4 are formed by pipe, and entrance 3 is a female female Luer, and outlet 4 is columniform straight tube.
Flexible member 2 is arranged in the cavity 10 of housing.This flexible member 2 can be manufactured by non-metal elastomers material.Preferably, the material of flexible member 2 is silica gel, thermoplastic elastomer (TPE) (TPE) or rubber.
Shown in composition graphs 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 example shown in Fig. 1 to Fig. 4, this cavity is the through hole 210 laterally running through two opposite flanks of plunger portion 21, and the shape of cross section of this through hole is rhombus.In another embodiment, this cavity also can be one end open in the side of plunger portion other end blind bore.The shape of cross section in hole, except rhombus, also can be oval, circular etc.Two of plunger portion relative sides are also provided with a pair groove 213,214, and this pair groove 213,214 is positioned at the below of the through hole 210 of plunger portion.
Reset portion 22 comprises base 221 and at least two elastic arms.Base 221 is connected with the bottom of plunger portion 21, has the gap allowing liquid to pass through between the side face of base 221 and the sidewall of housing hollow.One end of each elastic arm is connected with base 221, the other end is fixed on the sidewall of housing hollow 10, and the sidewall of the housing hollow 10 of indication can be the sidewall of the inner surface of upper cover body 111, the sidewall of the inner surface of base body 121 or between the bottom of upper cover 11 and the top of pedestal 12 here.
In example shown in Fig. 1 to Fig. 4, reset portion 22 comprises a pair elastic arm 223,224, this a pair elastic arm 223,224 is arranged at the both sides (such as left side and right side) of base 221 symmetrically, has the gap 13,14 allowing liquid to pass through between the other both sides (such as front side and rear side) of base 221 and the sidewall 101 of housing hollow 10.Elastic arm roughly in inverted L-shaped, comprises vertical edge portion and cross edge.The lower end in the vertical edge portion 2231,2241 of elastic arm 223,224 is connected with base 221, upper end is connected with one end of the cross edge 2232,2242 of elastic arm 223,224, the sidewall of the inner surface of base body 121 is close in the vertical edge portion 2231,2241 of elastic arm 223,224 respectively, be beneficial to guiding and not easily produce the component except axial force, the cross edge 2232,2242 of elastic arm 223,224 is fixed between the bottom of upper cover 11 and the top of pedestal 12 by the mode such as heat seal, assembling.The periphery wall of base body 121 is provided with annular flange flange 122 in the position near base body end face, bottom supporting also heat seal connection on the end face of this annular flange flange 122 of upper cover body 111.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 cross edge 2232,2242 of elastic arm 223,224 is clipped in by this ring-shaped step 114 and the end face 124 of base body.Also be respectively equipped with the hook portion 2233,2243 of bending downwards at the other end of the cross edge 2232,2242 of elastic arm 223,224, hook portion 2233,2243 is maintained between the inwall of the lower end of upper cover body 111 and the outer peripheral face on base body 121 top.Above-mentioned fixed form can guarantee that flexible member 2 is firmly fixed.
Plunger portion 21 can move between the first location and the second location.When plunger portion 21 is in primary importance, plunger portion 21 is closed and sealed entry 3; When plunger portion 21 is in the second position, the liquid flowed into from entrance 3 flows into outlet 4 through the cavity 10 of housing.Plunger portion 21 can be returned to primary importance by reset portion 22.
As depicted in figs. 1 and 2, when plunger portion 21 is 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, thus 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 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 is connected with the base 221 of reset portion 22.The sidewall on head 215 top is provided with sealing ring 219, and sealing ring 219 is formed with the inner surface of entrance 3 and seals; 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 contact of expansion section 216, on the truncated cone-shaped shoulder 117 of shell inner surface, forms sealing.
With reference to figure 3.When the end face of plunger portion 21 is pushed by the female Luer of the outside liquid medicine injecting device 7 of such as syringe, plunger portion 21 moves down, and in addition, because through hole 210 can produce distortion under pressure, volume diminishes, thus the generation of plunger portion 21 end face is subsided.Meanwhile, plunger portion 21 transfers the pressure in reset portion 22, causes the vertical edge portion 2231,2241 of a pair 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 opened all, from the medicinal liquid that entrance 3 inputs, the liquid flow path that space between the inwall and the outer wall of flexible member 2 of housing 1 is formed and be opened in cavity 10 bottom surface 105 on through hole 106, flow into outlet 4, then enter and export in 4 other conduits of the inlying catheter be connected, complete the process of clinical transfusion, the flow direction of liquid as shown by arrows in FIG..Time 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 groove 213,214 be arranged in 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, and closed by entrance 3 again and seal, flexible member 2 restores to the original state.
For meeting the demand of multiple-medicinal-liquid of carrying 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.Illustrate only an arm in figure, also according to the requirement of transfusion, multiple arm can be set in the side of housing 1.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 previous 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 hollow 10, and bottom surface described herein is not limited to the plane shown in figure, also can be boss or groove.The two opposite side walls of reset portion bottom is against on the sidewall of housing hollow, and this reset portion is meeting lateral magnification when being subject to axial compressive force; When plunger portion 21a moves to the second position, the part being positioned at the relative sidewall of reset portion two above this reset portion bottom is against due to lateral magnification on the sidewall of housing hollow, thus the skew of reset portion can be prevented, guarantee to provide an elastic reset power upwards 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 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 51 of housing.Support portion 226 is in convex arch, and this support portion 226 is supported on the bottom surface 105 of housing hollow 10, and the sidewall 2261,2262 that two of the bottom of support portion 226 are relative is against on the sidewall 101 of housing hollow.In other embodiments, the shape of body 225 such as also can be designed to ellipse, rhombus etc.Or 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 is in primary importance, plunger portion 21a closes and the end face of sealed entry 3, 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 is formed and seals; 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 liquid medicine injecting device 7 of such as syringe, plunger portion 21a moves down, in addition, because through hole 210a can produce distortion under pressure, volume diminishes, thus the generation of plunger portion 21a end face is subsided.Meanwhile, plunger portion 21a transfers the pressure on reset portion 22a, causes body 225 and support portion 226 to be crushed, and the relative arc section 2251,2252 of two of body 225 is to both sides lateral magnification.When plunger portion 21a moves to the second position, as shown in Figure 9 and Figure 10, the sidewall 2253 that body 225 two is relative, a part of 2253a of 2254, 2254a is against on the sidewall 101 of housing hollow 10 respectively, 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 the 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 opened all, and from the medicinal liquid that entrance 3 inputs, the liquid flow path that space between the inwall and the outer wall of flexible member 2a of housing 1 is formed and be opened in cavity 10 bottom surface 105 on through hole 106, flow into outlet 4, then enter and export in 4 other conduits of the inlying catheter be connected, 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, is closed by entrance 3 again and seals, flexible member 2a reinstatement.
Be for downward opening parabolical reset portion for shape, equally, this reset portion is bearing on the bottom surface of housing hollow, and the two opposite side walls of reset portion bottom is against on the sidewall of housing hollow; When plunger portion moves to the second position, due to the cause of lateral magnification, the part being positioned at the reset portion two opposite side walls above reset portion bottom has also arrived on the sidewall of housing hollow.
For meeting the demand of multiple-medicinal-liquid of carrying 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 inserting human vas.This needleless joint can also carry 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 not deviate from the spirit and scope of the present invention.
Claims (6)
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 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 is in described primary importance, plunger portion is closed and entrance described in sealing, when plunger portion is in the described second position, and the outlet described in the liquid flowed into from described entrance flows into through the cavity of housing; Described reset portion is used for plunger portion to be returned to described primary importance; Wherein:
The reset portion of described flexible member is bearing on the bottom surface of housing hollow, and the two opposite side walls of reset portion bottom is against on the sidewall of housing hollow; This reset portion is meeting lateral magnification when being subject to axial compressive force, and when described plunger portion moves to the described second position, the part being positioned at the reset portion two opposite side walls above reset portion bottom is against due to lateral magnification on the sidewall of housing hollow; Wherein, 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 convex arch, and this support portion is supported on the bottom surface of housing hollow, and the sidewall that two of the bottom of this support portion are relative is against on the sidewall of housing hollow; When described plunger portion moves to the described second position, a part for body two opposing sidewalls is against on the sidewall of housing hollow.
2. needleless joint as claimed in claim 1, it is characterized in that, described housing comprises upper cover and pedestal, and described upper cover and described pedestal are tightly connected; Described entrance be arranged on described on cover, described outlet is arranged on described pedestal.
3. needleless joint as claimed in claim 1, it is characterized in that, when described plunger portion is in described primary importance, the end face of this plunger portion flushes with the end face of described entrance.
4. needleless joint as claimed in claim 1, it is characterized in that, the material of described flexible member is silica gel, thermoplastic elastic body.
5. needleless joint as claimed in claim 1, is characterized in that, two of described plunger portion relative sides are respectively equipped with groove, and this groove is positioned at the below of the cavity of plunger portion.
6. 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, the cavity connects of described arm and 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 CN103418049A (en) | 2013-12-04 |
| CN103418049B true CN103418049B (en) | 2016-03-30 |
Family
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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) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5509433A (en) * | 1993-10-13 | 1996-04-23 | Paradis; Joseph R. | Control of fluid flow |
| CN201768265U (en) * | 2010-07-08 | 2011-03-23 | 潘秀凤 | Spherical type medicine feeder |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5569235A (en) * | 1994-06-21 | 1996-10-29 | Modern Medical Devices | Valve and valved container for use with a syringe fitting |
| US7140592B2 (en) * | 2002-12-31 | 2006-11-28 | Cardinal Health 303, Inc. | 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 |
| 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 (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5509433A (en) * | 1993-10-13 | 1996-04-23 | Paradis; Joseph R. | Control of fluid flow |
| CN201768265U (en) * | 2010-07-08 | 2011-03-23 | 潘秀凤 | Spherical type medicine feeder |
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| Publication number | Publication date |
|---|---|
| CN103418049A (en) | 2013-12-04 |
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