JP3181639U - Needless connector structure - Google Patents

Abstract

A needless connector structure for use in blood transfusion or the like is provided.
A first liquid channel 11 and a second liquid channel 12 are provided which are composed of a hollow connector 1, a spring 2, and an opening / closing assembly 3, and communicate with both ends of the hollow connector 1. An annular block having a narrowed diameter is provided, a first annular inner wall surface 112 is formed above it, and a second annular inner wall surface 113 having an enlarged diameter is formed below it. The opening / closing assembly 3 includes a stopper 31 and a conduit 32 connected to the stopper 31. The stopper 31 is pressed against the annular block portion by the spring 2, and the conduit 32 passes through the second liquid channel 12. The first annular portion 311 in contact with the first annular inner wall surface 112 and the second annular portion 312 in contact with the second annular inner wall surface 113 are provided on the outer periphery of the stopper 31.
[Selection] Figure 4

Description

The present invention relates to a medical device used for blood transfusion or medicinal solution, and more particularly to a kneeless connector structure.

A conventional syringe syringe is a common instrument for drug injection.
However, the needle has a sharp structure, so when using a syringe syringe, there is a risk of inadvertent needle stick accidents by medical staff, and infection may occur if the needle is not clean. .
Therefore, in order to avoid impact on medical staff and the environment, and to increase safety in use, care must be taken when disposing of the injection needle, and a specialized collection and processing system is required.

However, this has pushed up medical costs.
Therefore, a needless connector structure has been developed so that a drug can be injected in accordance with a needless syringe.
This type of device has low risk and can be used repeatedly, so that it is possible to avoid an increase in cost due to mass collection of used products.

The above kneeless connector structure has a “Needleless luer” shown in Patent Document 1.
access connector ".
It comprises a hollow shell and a septum, and a liquid channel is installed in the hollow shell.
The partition is installed in a hollow outer casing, closed before the liquid flow path, and seals the liquid flow path.
The partition is a soft elastic body and has a slit in the center.
Thus, the needless syringe is inserted through the slit and into the septum.
This deforms the septum and opens the liquid flow path, and the liquid in the needleless syringe enters the patient's body through the needleless connector structure.

However, “Needleless luer shown in Patent Document 1”
The structure of the “access connector” is unstable, as will be described in detail below.
Since the partition controls the opening and closing of the liquid flow path through the opening and closing of the slit, if a problem of elastic fatigue occurs in the partition over a long period of use, a situation of inadequate adhesion to the slit occurs and the blockage is blocked. The effect of.
As a result, when the injection is completed and the syringe is pulled back, the negative pressure method causes blood and medicine to flow back into the connector structure, overflowing from the slit, and infecting the medical staff or the environment. Has been made in view of the above-mentioned drawbacks of the conventional kneeless connector structure.

U.S. Patent No. 7,713,250 Japanese Patent Laid-Open No. 10-323397

  The problem to be solved by the present invention is that when released from an external force, the stopper is pressed by the action of a spring to automatically recover the closed state, and the liquid flow path is blocked by the first annular portion and the second annular portion. Thus, the stability of the entire structure is increased and a good sealing effect is achieved, thereby providing a needless connector structure in which the outside air cannot penetrate completely into the connector structure.

In order to solve the above problems, the present invention provides the following kneeless connector structure.
The kneeless connector structure has a hollow connector, a spring, and an opening and closing assembly.
A first liquid channel and a second liquid channel communicating from both ends of the hollow connector;
An annular block portion having a narrowed inner diameter is provided on the inner periphery of the first liquid flow path, a first annular inner wall surface is formed above the annular block, and a second annular inner wall surface having an enlarged inner diameter is formed below the annular block. Forming,
The spring is housed and installed at the position of the second annular inner wall surface of the first liquid channel,
The opening / closing assembly includes a stopper and a conduit extending from the stopper;
The stopper is placed in contact with the annular block portion and subjected to the pressing force of the spring, and the conduit is installed by inserting a tip portion into the second liquid channel, and on the outer peripheral edge of the stopper A first annular portion that seals the liquid in contact with the first annular inner wall surface, and a second annular portion that seals the liquid in contact with the second annular inner wall surface, and the stopper is formed by the first annular portion. And a guide hole communicating with the conduit is provided between the second annular portion and the second annular portion.

The kneeless connector structure of the present invention has the following five advantages.
1. The spring compressed under force is automatically recovered by pushing the stopper, so that the liquid flow path is blocked by the first and second annular parts on the stopper, and the stopper is moved to the elastic block part. By moving to the closed side, the function of sealing the needleless connector structure is achieved, and it is possible to avoid the entry of external air into the connector or the backflow of the drug and blood inside the patient body. Even if fatigue occurs, the stopper sealing effect is not affected, and thus the inventive kneeless connector structure has extremely excellent structural stability and sealing ability.
2. It is not necessary to use a conventional injection needle in the process of blood transfusion or drug delivery, and the use of a mutual connection between a needleless syringe and a needleless connector structure can avoid the occurrence of a needlestick case. By reducing exchange and recovery, medical costs can be reduced.
3. In the process in which the stopper slides along the first liquid flow path, the second annular part formed on the outer periphery of the stopper is always in contact with the second annular inner wall surface, so that the liquid is between the stopper and the second annular inner wall surface. Since there is no fear of oozing to other positions through the air gap, and thus the liquid surely flows into the guide hole, the kneeless connector structure of the present invention has good guide stability.
4. The stopper is equipped with a chock block and two O-rings fitted on the outer periphery of the chock block. The chock block is made of hard material, the O-ring is made of rubber or silicon rubber, and the chock block is made of Since the first annular part and the second annular part are formed opposite to the two O-rings, the present invention is simple and uses a convenient part for manufacturing. And thus reduce the manufacturing cost of the kneeless connector structure.
5. The surface of the stopper that comes into contact with the injection head is provided with a liquid inlet surface, and is provided with a guide groove leading to the periphery of the inlet surface, so that the liquid passes through the guide groove and enters the first liquid channel. It is possible to prevent the liquid from entering and being obstructed by the surface of the stopper, and the occurrence of the liquid backflow problem can be reduced.

It is a three-dimensional exploded view of the present invention needless connector structure. It is another kind of three-dimensional exploded view of the present invention needless connector structure. It is the combination schematic diagram of this invention needless type connector structure. It is a cross-sectional schematic diagram of this invention needless type connector structure. It is a use condition schematic diagram of this invention needless type connector structure. FIG. 6 is a schematic view of another type of usage state of the inventive kneeless connector structure.

  The best mode for carrying out the present invention will be described below in detail with reference to the drawings.

As shown in FIGS. 1 to 4, the kneeless connector structure 10 of the present invention includes a hollow connector 1, a spring 2, and an opening / closing assembly 3.

The hollow connector 1 includes a first hollow body 13 and a second hollow body 14 connected to each other.
A first liquid channel 11 is formed in the first hollow body 13, a second liquid channel 12 is provided in the second hollow body 14, and the first liquid channel 11 and the second liquid channel 12 are provided from both ends of the hollow connector 1. The second liquid channel 12 is communicated.

An inner diameter of the first hollow body 13 is narrowed on the inner peripheral surface of the first liquid channel 11 to form an annular block portion, and a first annular inner wall surface 112 having a smaller inner diameter is formed above the annular block portion. .

Further, the first liquid channel 11 forms a second annular inner wall surface 113 having an inner diameter narrowed (enlarged) below the annular block portion.

In the second hollow body 14, a partition wall 141 is provided, and a hollow tube 142 provided with a second liquid channel 12 through which the distal end portion of the conduit 32 of the stopper 31 is inserted is extended and provided.

An external thread yama 131 is provided at the end of the first hollow body 13 away from the second hollow body 14, and the second hollow body 14 is provided between the partition wall 141 and the hollow tube 142. Oppositely, a depressed section 143 is formed, and an inner screw yama 144 is opened on the outer peripheral edge of the depressed section 143.

The spring 2 is housed and installed in the first liquid channel 11, and the spring 2 is a spiral spring, but is not limited thereto.

The opening / closing assembly 3 includes a stopper 31 and a conduit 32 connected to the stopper 31, and the stopper 31 is sandwiched and fixed between the annular block 111 and the spring 2.

The conduit 32 of the stopper 31 is installed through the second liquid channel 12, and the outer periphery of the stopper 31 has a first annular portion 311 in contact with the first annular inner wall surface 112 of the first hollow body 13, And a second annular portion 312 in contact with the second annular inner wall surface 113 is formed.

The stopper 31 is provided with a guide hole 313 communicating with the conduit 32 between the first annular portion 311 and the second annular portion 312.

The stopper 31 includes a chock block 33 and two O-rings 34 fitted to the outer periphery of the chock block 33.

The chock block 33 is made of a hard material such as plastic, and the O-ring 34 is made of a material such as rubber or silicon rubber.

A conduit 32 is formed extending downward from the chock block 33, and a lead hole 313 communicating with the conduit 32 is provided.

The chock block 33 has a shoulder 331 having an enlarged outer diameter and a head 332 extending from the shoulder 331 in the direction opposite to the conduit 32. The outer diameter of the shoulder 331 is larger than the outer diameter of the head 332.

A first annular groove 333 is formed on the outer periphery of the head portion 332 of the chock block 33, and a second annular groove 334 is formed on the outer periphery of the shoulder portion 331. The first annular portion 311 and the second annular portion 312 are formed by fitting into the one annular groove 333 and the second annular groove 334, respectively.

Further, the chock block 33 forms a liquid entrance surface 335 on the top surface of the opposite end of the conduit 32 and forms one or a plurality of flow guide grooves 337 toward the peripheral edge 336 of the liquid entrance surface 335.

Further, one end of the spring 2 is in contact with the shoulder portion 331 of the chock block 33 and the other end is in contact with the partition wall 141.

As a result, the spring 2 is accommodated and installed in the first liquid channel 11, and exerts a pressing force toward the annular block 111 on the chock block 33.

In the combination of the inventive needless connector structure 10, the first liquid channel is communicated from both ends of the hollow connector 1 to the first liquid channel 11 of the first hollow body to the second liquid channel 12 of the second hollow body. 11 An annular block portion that contacts the stopper 31 is formed on the upper inner peripheral surface, and the upper inner periphery of the first liquid channel 11 above the annular block portion forms a first annular inner wall surface 112.

Further, a first annular inner wall surface 112 having an inner diameter enlarged below the annular block portion is formed in the first liquid channel 11.

The spring 2 is accommodated and installed at the position of the first annular inner wall surface 112 of the first liquid channel 11.

The stopper 31 of the opening / closing assembly 3 is connected to the tip of the conduit 32 by a spring 2 disposed between its shoulder and the partition wall 141 of the second hollow body 14, and the second liquid flow path of the second hollow body 14. 12 and is arranged so as to exert a pressing force toward the annular block portion by the action of the spring.

A first annular portion 311 that contacts the first annular inner wall surface 112 and a second annular portion 312 that contacts the second annular inner wall surface 113 are formed on the outer peripheral surface of the stopper 31, and the stopper 31 is formed of the first annular portion. A guide hole 313 communicating with the conduit 22 is provided between 311 and the second annular portion 312.

Thereby, the function of the spring 2 is to press the stopper 31 and close the liquid flow path by the first annular portion 311 and the second annular portion 312 fitted with the O-ring on the outer periphery of the stopper 31.

In this way, the function of sealing the needless connector structure 10 can be achieved, and the entry of outside air into the connector or the backflow of the drug and blood inside the patient can be avoided. Even if it occurs, the sealing effect of the stopper 31 is not affected.

In this way, the inventive sealed kneeless connector structure 10 has extremely excellent structural stability and sealing ability.

As shown in FIGS. 5 and 6 showing the use state of the inventive needleless connector structure, the injection head 101 of the needleless syringe 100 is inserted from the first liquid channel 11 of the hollow connector 1.

When a force is applied to the injection head 101 from above, the spring 2 is pressed and compressed, whereby the stopper 31 is lowered, and at the same time, the first annular portion 311 is restored to the original first annular shape. It moves from the position of the inner wall surface 112 to the position of the second annular inner wall surface 113 with an enlarged inner diameter.

Since the outer diameter of the second annular inner wall surface 113 is larger than the outer diameter of the first annular inner wall surface 112, the closing ability of the first annular portion 311 expires, and the liquid 200 of the needleless syringe 100 becomes the liquid entry surface. From 335, it enters the first liquid channel 11.

Furthermore, it flows into the conduit 22 and the second liquid flow path 12 through the guide hole 313, and is finally introduced into the patient to act on the patient's body.

This eliminates the need for conventional needles during medical transfusions or drug transfusions, and avoids needle stick incidents by connecting the needleless syringe 100 and the needleless connector structure 10 to each other. The medical cost can be reduced by reducing the exchange and recovery of the injection needle.

In the process in which the stopper 31 slides in the first liquid channel 11, the second annular portion 312 formed on the outer peripheral surface of the stopper 31 always contacts the second annular inner wall surface 113. However, there is no risk of leaking to other positions through the gap between the stopper 31 and the second annular inner wall surface 113.

Thus, the liquid 200 in the needleless syringe 100 surely flows into the guide hole 313, and the needless connector structure 10 of the present invention has a good guide stability.

Further, the stopper 31 includes a chock block 33 and two O-rings 34 fitted and installed on the outer periphery of the chock block 33. The chock block 33 is formed of a hard material, and the O-ring 34 is made of rubber. Alternatively, it is made of a material such as silicon rubber. The chock block 33 forms a first annular portion 311 and a second annular portion 312 that fit the two O-rings 34 and perform a sealing action.

As a result, the present invention is simple, and it is possible to easily assemble and configure the stopper 31 having a stable operation using parts convenient for manufacturing, and thus the manufacturing cost of the kneeless connector structure 10 can be reduced.

In addition, a liquid entry surface 335 is formed on the end surface of the stopper 31 that contacts the injection head 101, and a flow guide groove 337 reaching the peripheral edge 336 is provided on the liquid entry surface 335.

Thus, the liquid 200 in the needleless syringe 100 passes through the flow guide groove 337 and enters the first liquid flow path 11, and the liquid 200 can be prevented from being blocked by the surface of the stopper 31. The occurrence of 200 backflow problems can be reduced.

The names and contents of the present invention described above are only used for explaining the technical contents of the present invention, and do not limit the present invention. All equivalent applications based on the spirit of the present invention, parts (structures) conversion, replacement, and quantity increase / decrease shall be included in the protection scope of the present invention.

  The present invention has the novelty that is a requirement for utility model registration, has sufficient progress compared to similar products of the past, has high practicality, meets the needs of society, and has a very high industrial utility value. large.

10 Needless connector structure
1 Hollow connector
11 First liquid flow path
112 1st ring inner wall
113 Second annular inner wall
12 Second liquid flow path
13 First hollow body
131 External thread yama
14 Second hollow body
141 Bulkhead
142 hollow tube
143 Sinking Ward
144 Internal thread Yama
2 Spring
3 Opening and closing assembly
31 Stopper
311 1st ring
312 Second annular part
313 Guide hole
32 conduit
33 Chock Block
331 shoulder
332 head
333 1st annular groove
334 Second annular groove
335 Inlet surface
336
337 Diversion groove
34 O-ring
100 needleless syringe
101 injection head
200 liquid

Claims (10)

Needleless connector structure consisting of hollow connector, spring, opening and closing assembly,
The hollow connector includes a first liquid channel and a second liquid channel communicating with both ends, and an annular block portion having a narrowed diameter is formed on the inner periphery of the first liquid channel,
A first annular inner wall surface is formed above the annular block portion, and a second annular inner wall surface having an inner diameter larger than that is formed below,
The spring is accommodated and installed on the second annular inner wall surface in which the inner diameter of the first liquid channel is enlarged,
The opening / closing assembly includes a stopper and a conduit connected to the stopper, and the stopper is disposed through the second liquid flow path and movably disposed with respect to the annular block portion. Pressed toward the annular block by a spring,
Formed on the outer periphery of the stopper is a first annular portion that contacts the first annular inner wall surface and closes the flow path, and a second annular portion that contacts the second annular inner wall surface and closes the flow path,
A kneeless connector structure, wherein the stopper is provided with a conducting hole communicating with the conduit between the first annular portion and the second annular portion. The kneeless connector structure according to claim 1, wherein a peripheral size of the first annular inner wall surface is smaller than a peripheral size of the second annular inner wall surface. The stopper includes a chock block and two O-rings that are fitted on the outer periphery of the chock block.
Extending the conduit from the chock block;
The two O-rings are fitted to the outer periphery of the chock block to form the first annular portion and the second annular portion, and the chock block is provided with a guide hole communicating with the conduit. Item 2. A knitless connector structure according to Item 1. The chock block comprises a shoulder and a head extending from the shoulder in a direction opposite to the conduit;
The outer diameter of the shoulder is larger than the outer diameter of the head,
A first annular groove is provided on the outer periphery of the head, a second annular groove is provided on the outer periphery of the shoulder, and the two O-rings are fitted into the first annular groove and the second annular groove, respectively. A first annular portion that is positioned and contacts the first annular inner wall surface to close the flow path, and a second annular portion that contacts the second annular inner wall surface and closes the flow path are formed. Item 4. The kneeless connector structure according to Item 3. The chock block forms a liquid entry surface on the top surface in the opposite direction of the conduit;
The kneeless connector structure according to claim 3, wherein at least one flow guide groove reaching the periphery of the liquid entry surface is formed. The hollow connector comprises a first hollow body and a second hollow body connected to each other,
The first liquid channel is formed in the first hollow body, and the second hollow body is provided with a partition inside and a hollow tube provided with the second liquid channel in the center of the partition. The kneeless connector structure according to claim 1, wherein the connector is extended. The first hollow body is provided with an external thread yama at the end away from the second hollow body, and a recessed section is formed in the second hollow body between the partition wall and the hollow tube. And
The kneeless connector structure according to claim 6, wherein an inner screw yama is provided at an outer peripheral edge of the depressed section. The kneeless connector structure according to claim 3, wherein one end of the spring is in contact with the chock block. The kneeless connector structure according to claim 6, wherein the other end of the spring contacts the partition wall. The kneeless connector structure according to claim 1, wherein the spring is a spiral spring.

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