JP3181640U - Needleless connector structure - Google Patents

Abstract

A needle-free connector structure for use in blood transfusion or the like is provided.
A first connector including a hollow connector, an elastic block, and an opening / closing assembly includes a first liquid channel and a second liquid channel that communicate with both ends of the hollow connector. Is provided with an annular block having a narrowed diameter, a first annular inner wall surface 112 is formed above it, and a second annular inner wall surface 113 having a larger diameter is formed below it, and the elastic block 2 is a first liquid. The opening / closing assembly 3 includes a stopper 31 and a conduit 32 connected to the stopper 31. The stopper 31 is pressed toward the annular block portion by the elastic block 2, and the conduit 32 is connected to the second liquid. A first annular portion 311 in contact with the first annular inner wall surface 112 and a second annular portion 312 in contact with the second annular inner wall surface 113 are provided on the outer periphery of the stopper 31 in communication with the flow path 12.
[Selection] Figure 4

Description

The present invention relates to a medical device used for blood transfusion or medicinal solution, and particularly to a needle-free 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 increase safety in use, care must be taken when disposing of the needle, and specialized collection and processing measures are required.

However, this has pushed up medical costs.
For this reason, a needle-free connector structure has been developed so that drugs can be injected in accordance with a needleless 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 a large amount of collection.

The above needleless connector structure includes a “Needleless luer” shown in Patent Document 1.
access connector ".
It includes a hollow shell and a septum, and a flow path is installed in the hollow shell.
The partition is installed in a hollow outer casing, closed before the flow path, and seals the flow path.
The partition is a soft elastic body and has a slit at the center.
Thus, the needless syringe is inserted through the slit and into the septum.
Thus, the septum deforms and opens the 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 piece controls the opening and closing of the flow path through the opening and closing of the slit, if the problem of elastic fatigue occurs in the piece over a long period of use, the situation of inadequate adhesion to the slit occurs, The effect will be reduced.
When the injection is completed and the syringe is withdrawn, 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. This has been made in view of the above-described drawbacks of the needle-free 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 the external force disappears, the elastic block pushes the stopper to automatically recover, and the first annular part and the second annular part close the flow path of the medicine, etc. And providing a good sealing effect, thereby providing a needle-free connector structure in which ambient air cannot completely enter the connector structure.

In order to solve the above problems, the present invention provides the following needle-free connector structure.
The needle-free connector structure comprises a hollow connector,
The hollow connector includes a first channel and a second channel communicating with both ends,
An annular block portion having a narrowed diameter is provided on the inner periphery of the first flow path, a first annular wall is formed on the inner peripheral edge of the annular block, and the first flow path is formed between the annular block and the second flow path. In between, forming a second annular wall,
The elastic block is accommodated and installed in the first flow path,
The opening and closing assembly includes a stopper and a conduit connected by the stopper;
The stopper is sandwiched and fixed between the annular block and the elastic block,
The conduit is installed through the second flow path, and a first annular portion that contacts the first annular wall and a second annular portion that contacts the second annular wall are provided on the outer peripheral edge of the stopper. Forming,
The stopper has a guide hole communicating with the conduit between the first annular portion and the second annular portion.

The needle-free connector structure of the present invention has the following five effects.
1. Even if elastic fatigue occurs due to force, the function of the elastic block is to automatically recover by pushing the stopper, and the flow path is blocked by the first and second annular parts on the stopper. Even if elastic fatigue occurs in the elastic block due to long-term use, the function to seal the unnecessary connector structure is achieved, and it is possible to avoid the entry of outside air into the connector or the back flow of medicine and blood in the patient's body. The stopper sealing effect is not affected, so that the inventive needleless connector structure has extremely excellent structural stability and sealing ability.
2. In the process of medical blood transfusion or drug transfusion, it is not necessary to use a conventional needle, and if a mutual connection between a needleless syringe and a needle-free connector structure is used, the occurrence of a needlestick incident can be avoided. The medical cost can be reduced by reducing the exchange and recovery of the injection needle.
3. In the process in which the stopper slides along the first flow path, the second annular part formed on the outer periphery of the stopper always contacts the second annular wall, so that the liquid passes through the gap between the stopper and the second annular wall. There is no risk of oozing out elsewhere, thus ensuring that the liquid flows into the guide hole, so that the needleless connector structure of the present invention has good guide stability.
4. The stopper has a chock block and two O-rings that are placed over the periphery of the chock block. The chock block is made of a hard material, the O-ring is made of rubber or silicon, and the chock block has two pieces. The first annular part and the second annular part are formed opposite to the O-ring, so that the present invention is simple and can be constructed by simply combining stoppers with a stable structure using parts convenient for manufacturing. Thus, the manufacturing cost of the injection needle-free connector structure can be reduced.
5. A liquid entrance surface is formed on the surface of the stopper that contacts the injection head, an edge is provided on the periphery of the liquid entrance surface, and a guide groove is provided on the end edge. It can be avoided that the liquid enters the first flow path through the groove and is 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 needleless connector structure. It is another kind of three-dimensional exploded view of the present invention needle-free connector structure. It is a combination schematic diagram of the present invention injection needle unnecessary connector structure. It is a cross-sectional schematic diagram of the present invention injection needle-free connector structure. It is a use state schematic diagram of the present invention injection needle unnecessary type connector structure. It is a use condition schematic diagram of another kind of this invention needle type 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 injection needle-free connector structure 10 of the present invention includes a hollow connector 1, an elastic block 2, and an opening / closing assembly 3.

The hollow connector 1 includes a first flow path 11 and a second flow path 12 communicating at both ends, and an annular block portion whose diameter is narrowed is provided on the inner periphery of the first flow path 11.

A first annular wall 112 is formed above the annular block portion, and a second annular wall 113 having a diameter larger than that of the first annular wall 112 is formed below the annular block portion. Is smaller than the inner diameter of the second annular wall 113.

The hollow connector 1 includes a first hollow body 13 and a second hollow body 14 connected to each other, and a first flow path 11 is formed in the first hollow body 13.

The second hollow body 14 is formed by providing a partition wall 141 inside and extending a hollow tube 142 having the second flow channel 12 formed in the center of the partition wall 141.

An external thread yama 131 is provided on the side of the first hollow body 13 opposite to the second hollow body 14, and the second hollow body 14 has a space between the partition wall 141 and the hollow tube 142. In contrast, an indented section 143 is formed, and an inner screw yama 144 is formed on the outer peripheral edge of the indented section 143.

The elastic block 2 is housed and installed in the first flow path 11, and the material of the elastic block 2 is sponge, rubber, or silicon rubber, and the outer mold of the elastic block 2 has an I-shape. However, the present invention is not limited to this.

The opening / closing assembly 3 includes a stopper 31 and a conduit 32 connected to the stopper 31, and the stopper 31 is disposed in contact with the annular block portion and receiving the pressing force of the elastic block 2.

The conduit 32 is disposed so as to pass through the second flow path 12, and a first annular portion 311 in contact with the first annular wall 112 and a second annular wall 113 in contact with the outer periphery of the stopper 31. A bicyclic portion 312 is formed.

The stopper 31 is provided with a guide hole 313 communicating with the conduit 22 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 and installed on 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 rubber. Alternatively, a material such as silicon rubber is used.

The conduit 32 extends from the chock block 33, and the two O-rings 34 are fitted to the outer periphery of the chock block 33 to form a first annular portion 311 and a second annular portion 312. A guide hole 313 communicating with the conduit 22 is installed.

The chock block 33 extends from the shoulder 331 and the head 332 to the opposite direction of the conduit 32 from the shoulder 331, and the outer diameter of the shoulder 331 is larger than the outer diameter of the head 332.

A first annular groove 333 is provided on the outer periphery of the head 332, a second annular groove 334 is provided on the periphery of the shoulder 331, and the two O-rings 34 include the first annular groove 333 and the The first annular portion 311 and the second annular portion 312 are formed by fitting in the second annular groove 334, respectively.

Further, the chock block 33 forms a liquid inlet surface 335 on the opposite top surface of the conduit 32, and is provided with one or a plurality of flow guide grooves 337 reaching the periphery of the liquid inlet surface 335.

Further, one end of the elastic block 2 is in contact with the chock block 33 and the opposite end is in contact with the partition wall 141.

Accordingly, the elastic block 2 is accommodated and installed in the first flow path 11 and applies a pressing force that contacts the annular block portion to the chock block 33.

The combination of the needle-free connector structure 10 of the present invention has a first flow path 11 and a second flow path 12 that communicate with each other at both ends of the hollow connector 1, and an annular block portion that narrows the diameter is provided on the inner periphery of the first flow path 11. A first annular wall 112 is formed above the annular block portion, and a second annular wall 113 having an enlarged diameter is formed below.

The elastic block 2 is housed and installed in a second annular wall 113 having an enlarged diameter of the first flow path 11, and the opening / closing assembly 3 connects a stopper 31 and a conduit 32 from the stopper 31, and the stopper 31 is The elastic block 2 is arranged to receive the pressing force toward the annular block portion.

The conduit 31 has a distal end inserted into the second flow path 12 and is arranged on the outer periphery of the stopper 31 with a first annular portion 311 in contact with the first annular wall 112 and a second annular wall 113 in contact with the second annular wall 113. A bicyclic portion 312 is formed, and the stopper 31 is provided with a guide hole 313 communicating with the conduit 22 between the first annular portion 311 and the second annular portion 312.

As a result, the elastic block 2 released from the external force presses the stopper 31 and automatically returns it, and the first annular portion 311 and the second annular portion 312 of the stopper 31 block the flow path.

In this way, the needle-free connector structure 10 achieves the function of sealing and can prevent the entry of external air into the connector or the backflow of medicine and blood in the patient's body. Even if this occurs, the blocking effect of the stopper 31 is not affected.

Thus, the needle-free connector structure 10 of the present invention has extremely excellent structural stability and sealing ability.

As shown in FIGS. 5 and 6 showing the use state of the injection needle-free connector structure of the present invention, the injection head 101 of the needleless syringe 100 is inserted from the first flow path 11 of the hollow connector 1.

When a force is applied to the injection head 101, the elastic block 2 is compressed and deformed, and the stopper 31 is retracted inward.

At the same time, the first annular portion 311 moves from the original position of the first annular wall 112 to the position of the second annular wall 113.

Since the outer diameter of the first annular wall 112 is smaller than the outer diameter of the second annular wall 113, the sealing ability of the first annular portion 311 expires, and the liquid 200 of the needleless syringe 100 is allowed to enter the liquid entry surface 335. Thus, it enters the first flow path 11.

Further, it passes through the guide hole 313, flows into the conduit 22 and the second flow path 12, and finally enters the patient body to be used by the patient's body.

This eliminates the need to use a conventional injection needle in the process of medical blood transfusion or drug transfusion, and if a mutual connection between the needleless syringe 100 and the needle-free connector structure 10 is used, the occurrence of a needlestick incident The medical cost can be reduced by reducing the replacement and recovery of the injection needle.

Further, in the process in which the stopper 31 slides along the first flow path 11, the second annular portion 312 formed on the outer peripheral edge of the stopper 31 is always in contact with the second annular wall 113. There is no risk of oozing out to other positions through the gap between the stopper 31 and the second annular wall 113.

Accordingly, the liquid 200 surely flows into the guide hole 313, and thus the needleless connector structure 10 of the present invention has good guide stability.

Further, the stopper 31 includes a chock block 33 and two O-rings 34 installed on the periphery of the chock block 33. The chock block 33 is made of a hard material, and the O-ring 34 is made of rubber or silicon rubber. It is the same material.

Since the chock block 33 forms the first annular portion 311 and the second annular portion 312 that perform a sealing action by the two O-rings 34, the present invention is simple and uses parts that are convenient for manufacturing. The stopper 31 having a stable structure can be easily assembled and configured, and thus the manufacturing cost of the injection needle-free connector structure 10 can be reduced.

In addition, since the liquid inlet 200 is formed with a liquid inlet surface 335 on the end surface of the stopper 31 that contacts the injection head 101 and reaches the periphery of the liquid inlet surface 335, the liquid 200 is provided with the liquid inlet groove 337. Thus, the liquid 200 can be prevented from entering the first flow path 11 and being obstructed by the surface of the stopper 31, and the occurrence of the backflow problem of the liquid 200 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 Needleless connector structure
1 Hollow connector
11 First channel
112 first annular wall
113 Second annular wall
12 Second channel
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 Elastic block
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 edge
337 Diversion groove
34 O-ring
100 needleless syringe
101 injection head
200 liquid

Claims (10)

A needle-free connector structure consisting of a hollow connector, an elastic block, and an opening / closing assembly,
A first flow path and a second flow path communicating with both ends of the hollow connector are provided, an annular block portion having a narrowed diameter is provided on the inner periphery of the first flow path, a first annular wall is formed above the first flow path, and Forms a second annular wall with an enlarged diameter,
The elastic block is accommodated and installed in a second annular wall having an enlarged diameter of the first flow path,
The opening / closing assembly includes a stopper and a conduit connected to the stopper, and the stopper is arranged to receive a pressing force by the elastic block toward the annular block, and the conduit has a tip at the second flow path. The stopper is formed on the outer periphery of the stopper by forming a first annular portion sealed in contact with the first annular wall and a second annular portion sealed in contact with the second annular wall. The injection needle-free connector structure, wherein a guide hole communicating with the conduit is provided between the first annular portion and the second annular portion. 2. The injection needle-free connector structure according to claim 1, wherein an inner diameter of the first annular wall is smaller than an inner diameter of the second annular wall. The stopper includes a chock block and two O-rings that are fitted on the outer periphery of the chock block.
The chock block extends the conduit, and the two O-rings are fitted on the outer periphery of the chock block to form the first annular portion and the second annular portion, and the chock block includes the guide hole. The injection needle-free connector structure according to claim 1, wherein: The chock block includes 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 installed on the outer periphery of the head, and a second annular groove is installed on the outer periphery of the shoulder.
The two O-rings are fitted and positioned in the first annular groove and the second annular groove, respectively, to form the first annular portion and the second annular portion. Needle-free connector structure. 4. The chock block is characterized in that a liquid entrance surface is formed on the top surface on the opposite side of the conduit, and at least one flow guide groove is provided toward the periphery of the liquid entrance surface. The needle-free connector structure described in 1. The hollow connector comprises a first hollow body and a second hollow body connected to each other,
In the first hollow body, the first flow path is formed, and in the second hollow body, a partition is provided inside, and a hollow tube having a second flow path formed in the center thereof is provided in the first hollow body. The injection needle-free connector structure according to claim 1, wherein the connector structure is formed so as to extend in the opposite direction. The first hollow body has an external thread yama at the end away from the second hollow body,
In the second hollow body, a depressed section is formed oppositely between the partition wall and the hollow tube, and an inner screw yama is provided at an outer peripheral edge of the depressed section. The injection needle-free connector structure as described. 4. The injection needle-less connector structure according to claim 3, wherein one end of the elastic block is in contact with the chock block. The injection needle-free connector structure according to claim 6, wherein one end of the elastic block is in contact with the partition wall. The material of the elastic block is sponge, rubber or silicon rubber,
2. The injection needle-less connector structure according to claim 1, wherein the outer mold of the elastic block has an I-shape.

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