A breakaway coupling

Abstract

The utility model discloses a broken type connecting joint, including first joint, broken part, straight through joint that connect in proper order, can be bent fracture at broken part, broken part includes: liquid inlet end, bending section, liquid outlet end, liquid inlet end is connected in first joint, liquid outlet end is connected in straight through joint, and the pipeline wall thickness of bending section is less than the pipeline wall thickness of liquid inlet end, liquid outlet end, and the outer wall of bending section is concave to form first recess. In the technology, the pipeline wall thickness of bending section is less than the connected pipeline wall thickness, after use, the broken part is bent, and the bending section is directly broken, the first joint and the anti -reverse flow part are disconnected, the needle cylinder is quickly disassembled, and the phenomenon that cannot be removed due to the joint screwing too tightly is avoided. Furthermore, by setting the anti -reverse flow part between the broken part and the straight through joint, the one -way flow function of the broken type connecting joint can be realized, the liquid medicine reverse flow is prevented, and the application scene of the broken type connecting joint is widened.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical equipment technical field especially relates to a broken type connecting joint. BACKGROUND

[0002] In the traditional medical infusion or injection system, the connecting joint of the needle cylinder and the connecting pipe generally adopts the screwing or the buckle fixing mode. In the related art, the conventional connecting joint is usually connected to the needle cylinder through the screwing mode in the disposable injection pipeline in the medical injection and related fields. This design meets the basic connection requirement to a certain extent, but with the development of medical technology and the complication of clinical scenes, some shortcomings are gradually exposed.

[0003] The connecting joint and the needle cylinder connected through the screwing mode need to be disassembled after use. Generally, the artificial disassembly mode is adopted. The medical staff needs to apply a torque of 3-5 kg to the connecting joint and the needle cylinder to rotate and separate them. According to statistics, the average disassembly time is 8.2 seconds. In some cases, such as minimally invasive surgery, cardiopulmonary resuscitation and other emergency rescue scenes, the increase of disassembly time may directly affect the golden rescue window. In the first-aid operation, about 17% of the instrument operation delay is caused by the disassembly difficulty of the traditional joint. Furthermore, due to the different personal operation methods of the medical staff, the connecting joint and the needle cylinder are prone to be screwed too tightly, which may cause the disassembly difficulty or the disassembly difficulty when disassembled, thereby causing the trouble for the clinical use. SUMMARY

[0004] In view of the deficiencies of the related art, the purpose of the utility model is to provide a broken type connecting joint, which aims to solve the technical problems that the connecting joint and the needle cylinder connected through the screwing mode in the related art are prone to disassembly difficulty, disassembly difficulty or increase of disassembly time.

[0005] The utility model discloses a broken type connecting joint, which comprises first joint, broken part and straight-through joint connected in sequence, the interiors of first joint, broken part and straight-through joint are communicated, and the connecting joint can be bent and broken at the broken part.

[0006] The pipeline wall thickness of the liquid inlet end and the liquid outlet end is D1, the pipeline wall thickness of the bending section is D2, and the relationship 0.4*D1≤D2≤0.6*D1 is met.

[0007] Specifically, the end of the first joint away from the broken part is provided with a first threaded end.

[0008] Preferably, the outer wall of the straight connector is provided with winglets; the number of winglets is two, and the two winglets are arranged symmetrically.

[0009] Specifically, the end of the straight connector away from the break is chamfered so that the end diameter is larger than the inner diameter of the straight connector.

[0010] The foldable connector also includes an anti-backflow section, the two ends of which are connected to the foldable section and the straight connector, respectively.

[0011] Specifically, the backflow prevention part includes: a first plug end, a second plug end, an elastic seal, and a blocking part. The first plug end is fitted and connected to the second plug end, forming a liquid passage cavity between the first plug end and the second plug end. The blocking part is connected to the first plug end and has a gap between the blocking part and the first plug end. The elastic seal is located in the liquid passage cavity and has a liquid passage hole. When the elastic seal does not deform, the elastic seal fits against the blocking part to block the liquid passage hole.

[0012] Specifically, the first plug end includes: a first convex ring and a first connecting plate. The first connecting plate is connected to the liquid outlet end. The first convex ring is located on the side of the first connecting plate away from the liquid outlet end. The first connecting plate is provided with a first through hole that communicates with the bent section and the liquid passage cavity. The sealing part is connected to the inner wall of the first through hole and a gap is provided between the sealing part and the inner wall of the first through hole.

[0013] Specifically, the second connector includes: a first connecting ring and a second connecting ring. The first connecting ring and the second connecting ring are coaxially arranged and a second groove is formed between the first connecting ring and the second connecting ring. A first convex ring is inserted into the second groove. A first protrusion is provided on the inner wall of the straight connector. One end of the elastic seal abuts against the first protrusion, and the outer wall of the elastic seal abuts against the inner side of the second connecting ring.

[0014] The present invention discloses a detachable connector, comprising a first connector, a detachable portion, and a straight connector connected in sequence. The first connector, the detachable portion, and the straight connector are internally connected, and the connector can be broken by bending at the detachable portion. The detachable portion includes an inlet end, a bent section, and an outlet end. The inlet end is connected to the first connector, and the outlet end is connected to the straight connector. The wall thickness of the bent section is less than the wall thickness of the inlet end and the outlet end. The outer wall of the bent section is concave inward to form a first groove. In this technology, by setting the wall thickness of the bent section to be less than the wall thickness of the connected pipes, when disassembly is required after use, the detachable portion can be bent to directly break the bent section, thereby disconnecting the first connector from the anti-backflow part and enabling quick disassembly of the syringe, avoiding problems such as difficulty in disassembly, inability to disassemble, or increased disassembly time. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any innovative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the breakable connector disclosed in Example 1; Figure 2 This is a cross-sectional view of the breakable connector disclosed in Example 1; Figure 3 This is a schematic diagram of the overall structure of the breakable connector disclosed in Example 2; Figure 4 This is a bottom view of the break-off connector disclosed in Example 2; Figure 5 This is a cross-sectional view of the breakable connector disclosed in Example 2; Figure label: 1. First connector; 11. First threaded end; 2. Broken section; 21. Liquid inlet end; 22. Bent section; 23. Liquid outlet end; 3. Straight connector; 31. Blade; 32. Chamfered section; 4. Anti-backflow section; 40. Liquid passage chamber; 41. First insertion end; 411. First convex ring; 412. First connecting plate; 42. Second insertion end; 421. First connecting ring; 422. Second connecting ring; 423. Second groove; 43. Elastic seal; 431. Liquid passage hole; 432. Abutting convex ring; 44. Sealing section; Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0018] It should be understood that, when used in this specification and the appended claims, the terms “comprising” and “including” indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0019] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0020] It should also be further understood that the terms "and" and "or" as used in this specification and the appended claims refer to any combination of one or more of the associated listed items and all possible combinations, and include such combinations.

[0021] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims. Example

[0022] Please see Figures 1-2 This embodiment discloses a breakable connector, including a first connector 1, a break portion 2, and a straight connector 3 connected in sequence. The first connector 1, the break portion 2, and the straight connector 3 are internally connected. The connector can be broken by bending at the break portion 2. The break portion 2 includes: an inlet end 21, a bending section 22, and an outlet end 23. The inlet end 21 is connected to the first connector 1, and the outlet end 23 is connected to the straight connector 3. The pipe wall thickness of the bending section 22 is less than the pipe wall thickness of the inlet end 21 and the outlet end 23. The outer wall of the bending section 22 is concave inward to form a first groove 221. The cross-section of the break portion 2 is V-shaped.

[0023] The pipe wall thickness of the inlet end 21 and the outlet end 23 is D1, and the pipe wall thickness of the bend section 22 is D2, satisfying the relationship 0.4*D1≤D2≤0.6*D1. By setting the pipe wall thickness of the bend section 22 to be smaller than that of the inlet end 21 and the outlet end 23, the bend section 22 can be easily broken. In this embodiment, D2=0.5*D1 is set. Similarly, the inner diameter of the break section 2 is set to be smaller than that of the first connector 1 and the straight connector, so that the break section 2 can be broken.

[0024] Specifically, the end of the first connector 1 away from the broken part 2 is provided with a first threaded end 11. The first threaded end 11 is used to connect to another male connector. Specifically, the outer side of the end of the first threaded end 11 is provided with an external thread that is adapted to the inner wall of the other male connector. The connection between the first connector 1 and the other male connector is achieved by screwing the first threaded end 11 to the other male connector.

[0025] The outer wall of the straight connector 3 is provided with a wing 31, which makes it easy for the user to hold the wing 31 for operation.

[0026] Specifically, there are two winglets 31, which are symmetrically arranged. In this embodiment, the two winglets 31 are on the same plane, which makes it convenient for the user to hold the winglets 31 to operate and to plug or rotate the connector to the adjacent pipeline.

[0027] The straight connector 3 has a chamfered portion 32 at the end far from the broken part 2, so that the end diameter is larger than the inner diameter of the straight connector 3. This arrangement makes it easier for adjacent connecting pipes to be inserted into the straight connector 3 for connection.

[0028] In clinical application, the first threaded end 11 of the first connector 1 is still connected to the male connector end of the syringe by screwing, and the straight connector 3 is connected to the adjacent infusion tubing. When the syringe and infusion tubing need to be disassembled after use, medical staff can press with one hand to achieve "one-fold break" of the bent section 22. The disassembly time is less than 3 seconds, which meets the single-hand operation standard of minimally invasive surgery and realizes the rapid separation of the syringe and infusion tubing. Moreover, the possibility of reusing the broken connector is 0, which effectively reduces the phenomenon of cross-infection in clinical application. Example

[0029] The basic content is the same as in Example 1, please refer to it. Figures 3-5 The difference is that the foldable connector disclosed in this embodiment also includes an anti-backflow part 4. The two ends of the anti-backflow part 4 are connected to the foldable part 2 and the straight connector 3 respectively. The anti-backflow part 4 can realize the unidirectional flow of the medicine from the first connector to the straight connector, thus avoiding the backflow of the medicine.

[0030] The backflow prevention part 4 includes: a first insertion end 41, a second insertion end 42, an elastic seal 43, and a sealing part 44. The first insertion end 41 is connected to the second insertion end 42, forming a liquid passage cavity 40 between the first insertion end 41 and the second insertion end 42. The sealing part 44 is connected to the first insertion end 41, and a gap (not shown in the figure) is provided between the sealing part 44 and the first insertion end 41. The elastic seal 43 is disposed in the liquid passage cavity 40 and has a liquid passage hole 431. When the elastic seal 43 does not deform, it fits against the sealing part 44 to seal. The liquid passage 431 is blocked. In specific implementation, the liquid flows into the liquid passage chamber 40 through the first connector 1 and the orifice. Under the action of gravity, the liquid presses down the elastic seal 43, and a liquid passage is formed between the elastic seal 43 and the blocking part 44. The liquid flows into the liquid passage 431 through the liquid passage and into the straight connector 3, so that the liquid flows from the first connector 1 to the straight connector 3. If the liquid flows back, the liquid flows into the liquid passage chamber 40 through the straight connector 3, presses the elastic seal 43 against the blocking part 44, and blocks the liquid passage 431, thereby preventing the liquid from flowing into the first connector 1 from the straight connector 3 and preventing the liquid from flowing back.

[0031] Specifically, the first plug-in end 41 includes: a first protrusion ring 411 and a first connecting plate 412. The first connecting plate 412 is connected to the liquid outlet end 23. The first protrusion ring 411 is located on the side of the first connecting plate 412 away from the liquid outlet end 23. The first connecting plate 412 is provided with a first through hole that communicates with the bent section 22 and the liquid passage chamber 40. The sealing part 44 is connected to the inner wall of the first through hole, and there is a gap between the sealing part 44 and the inner wall of the first through hole to facilitate the flow of liquid from the broken part 2 into the liquid passage chamber.

[0032] Specifically, the second connector 42 includes a first connecting ring 421 and a second connecting ring 422. The first connecting ring 421 and the second connecting ring 422 are coaxially arranged and a second groove 423 is formed between the first connecting ring 421 and the second connecting ring 422. A first protrusion 411 is inserted into the second groove 423. A first protrusion 32 is provided on the inner wall of the straight connector 3. One end of the elastic seal 43 abuts against the first protrusion 32, and the outer wall of the elastic seal 43 abuts against the inner side of the second connecting ring 422. Specifically, one end of the elastic seal 43 is provided with an abutting protrusion 432, which abuts against the first protrusion 32.

[0033] In clinical applications, the first connector 1 is connected to the male connector end of the syringe by screwing, and the straight connector 3 is connected to the adjacent infusion tube. During use, the anti-backflow part 4 can realize the one-way flow of the medicine, avoiding backflow of the medicine and causing trouble for clinical use. After use, medical staff can press the bending section 22 with one hand to achieve "one bend and break". The disassembly time is short, and after breaking, the anti-backflow part 4 can prevent the medicine in the straight connector 3 from flowing out, avoiding the medicine dripping and contaminating the medical environment, thus expanding the application scenarios of the connector.

[0034] The present invention discloses a detachable connector, comprising a first connector, a detachable portion, and a straight connector connected in sequence. The first connector, the detachable portion, and the straight connector are internally connected. The connector can be broken by bending at the detachable portion. The detachable portion includes an inlet end, a bending section, and an outlet end. The inlet end is connected to the first connector, and the outlet end is connected to the straight connector. The pipe wall thickness of the bending section is less than the pipe wall thickness of the inlet end and the outlet end. The outer wall of the bending section is recessed inward to form a first groove. In this technology, by setting the wall thickness of the bent section of the tubing to be less than that of the connected tubing, when disassembly is required after use, the bent section can be bent directly to break it off, thus disconnecting the first connector from the anti-backflow part. This allows for quick disassembly of the syringe and avoids the problem of being unable to disassemble due to overtightening of the connector. Furthermore, by setting the anti-backflow part between the bent section and the straight connector, the one-way flow function of the detachable connector can also be achieved, preventing backflow of the medication. The detachable connector in this technology can be applied to quick-release connectors in medical surgery, avoiding the technical problems of difficulty in disassembly, inability to disassemble, or increased disassembly time that occur when disassembling the connector and syringe in related technologies.

[0035] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent modifications or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A breakable connector, characterized in that, It includes a first connector, a broken section, and a straight connector connected in sequence. The first connector, the broken section, and the straight connector are internally connected. The connecting connector can be broken by bending at the broken section. The broken section includes: an inlet end, a bend section, and an outlet end. The inlet end is connected to the first connector, and the outlet end is connected to the straight connector. The pipe wall thickness of the bend section is less than the pipe wall thickness of the inlet end and the outlet end. The outer wall of the bend section is recessed inward to form a first groove.

2. The breakable connector according to claim 1, characterized in that, The pipe wall thickness at the inlet and outlet is D1, and the pipe wall thickness at the bend is D2, satisfying the relationship 0.4*D1≤D2≤0.6*D1.

3. The breakable connector according to claim 1, characterized in that, The end of the first connector away from the broken part is provided with a first threaded end.

4. The breakable connector according to claim 1, characterized in that, The outer wall of the straight connector is provided with fins.

5. The breakable connector according to claim 4, characterized in that, There are two winglets, which are arranged symmetrically.

6. The breakable connector according to claim 1, characterized in that, The end of the straight connector away from the break is chamfered so that the end diameter is larger than the inner diameter of the straight connector.

7. The breakable connector according to claim 1, characterized in that, It also includes a backflow prevention section, the two ends of which are connected to the break section and the straight connector, respectively.

8. The breakable connector according to claim 7, characterized in that, The backflow prevention part includes: a first plug end, a second plug end, an elastic seal, and a plugging part. The first plug end is fitted and connected to the second plug end, forming a liquid passage cavity between the first plug end and the second plug end. The plugging part is connected to the first plug end and has a gap between the plugging part and the first plug end. The elastic seal is disposed in the liquid passage cavity and has a liquid passage hole. When the elastic seal does not deform, the elastic seal fits against the plugging part to block the liquid passage hole.

9. A breakable connector according to claim 8, characterized in that, The first connector includes: a first protruding ring and a first connecting plate. The first connecting plate is connected to the liquid outlet end. The first protruding ring is located on the side of the first connecting plate away from the liquid outlet end. The first connecting plate is provided with a first through hole that communicates with the bent section and the liquid passage cavity. The sealing part is connected to the inner wall of the first through hole and a gap is provided between the sealing part and the inner wall of the first through hole.

10. A breakable connector according to claim 9, characterized in that, The second connector includes: a first connecting ring and a second connecting ring. The first connecting ring and the second connecting ring are coaxially arranged and a second groove is formed between the first connecting ring and the second connecting ring. A first convex ring is inserted into the second groove. A first protrusion is provided on the inner wall of the straight connector. One end of the elastic seal abuts against the first protrusion, and the outer wall of the elastic seal abuts against the inner side of the second connecting ring.

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