Syringe connector

Abstract

A syringe adapter, the lower end of which is used to connect a syringe, comprises: an adapter body (210) having a vertical central passage (211); and the sealing assembly is arranged at the upper end of the central channel (211), and a fluid passage (226) is formed in the sealing assembly. The sealing assembly comprises a first sealing piece (220), and the first sealing piece (220) controls opening and closing of the fluid channel (226). Opening the fluid passage (226) when the first seal (220) is subjected to a downward pressing force; when the extrusion force is eliminated, the first sealing piece (220) rebounds and resets by means of the elasticity of the first sealing piece (220), and the fluid channel (226) is closed. After the injector connector is installed on an injector, a fluid channel is opened by triggering the first sealing piece, the sealing protection effect can be achieved in the medicine dispensing, medicine taking and transferring processes of the injector, dripping and volatilization of medicine liquid are effectively prevented, and the safety protection effect on medical staff and the environment is achieved.

Description

Technical Field

[0001] This utility model relates to the field of medical devices in general, and specifically to a syringe connector. Background Technology

[0002] When healthcare workers use syringes to prepare, transfer, and inject hazardous drugs, the lack of a sealed needle often leads to dripping and evaporation of the medication. These hazardous drugs can enter the healthcare worker's body through the skin, digestive tract, and respiratory tract, posing a threat to their health. Hazardous drugs include anti-tumor drugs, antiviral drugs, hormones, and some bioengineered drugs (such as targeted therapies). Healthcare workers who are exposed to hazardous drugs year-round face the risk of exposure at every stage of their work. Even the use of biosafety cabinets cannot completely eliminate the risk of hazardous drug exposure. Utility Model Content

[0003] The purpose of this invention is to provide a syringe connector that can provide a sealing and protective function for the syringe.

[0004] According to the syringe connector of this utility model, the lower end is used to connect to a syringe, and includes:

[0005] The connector body has a vertical central channel;

[0006] A sealing assembly is located at the upper end of the central channel. A fluid passage is formed in the sealing assembly. The sealing assembly contains a first seal, which controls the opening and closing of the fluid passage. When the first seal is subjected to downward pressure, the fluid passage is opened. When the pressure is removed, the first seal returns to its original position due to its elasticity, thus closing the fluid passage.

[0007] In one specific embodiment of this utility model, the sealing assembly includes:

[0008] A sealing rod is fixedly installed in the central channel of the connector body, and the upper end of the sealing rod has an enlarged portion;

[0009] The first sealing element is disposed on the outer periphery of the sealing rod, with its upper end abutting against the enlarged portion of the sealing rod and extending outward to form an annular surface; a fluid passage is formed in the first sealing element, with the upper end of the fluid passage being closed by the enlarged portion of the sealing rod; the lower end of the fluid passage is connected to the central channel.

[0010] When the annular surface is subjected to downward extrusion force, the fluid passage is opened; when the extrusion force is removed, the first seal returns to its original position due to its own elasticity, thus closing the fluid passage.

[0011] In another specific embodiment of this utility model, the sealing assembly includes:

[0012] The needle body is fixedly installed at the upper end of the central channel of the connector body; the needle body has an axial channel that forms a fluid passage.

[0013] The first sealing element is wrapped around the outer periphery of the needle body, with its upper end extending outward to form an annular surface;

[0014] When the annular surface is subjected to downward pressure, the needle tip pierces the first seal and opens the fluid passage; when the pressure is removed, the first seal rebounds and resets itself, and the needle tip returns to the inside of the first seal, closing the fluid passage.

[0015] In another specific embodiment of this utility model, the sealing assembly includes:

[0016] The first seal has a fluid passage; the upper part of the first seal has an annular surface.

[0017] The second seal is located below the first seal and seals the central channel.

[0018] When the annular surface is subjected to downward extrusion force, the first seal presses down on the second seal, opening the fluid passage; when the extrusion force is removed, the first and second seals rely on their own elastic rebound to reset and close the fluid passage.

[0019] In a preferred embodiment of this utility model, the upper end of the connector body forms a male Luer connector structure, and the lower end of the connector body forms a female Luer connector structure.

[0020] In a preferred embodiment, the upper section of the connector body extends outward with a connecting groove, and the inner wall of the connecting groove is provided with an internal thread.

[0021] In a preferred embodiment, a gripping part is provided on the outer wall of the connecting groove.

[0022] Furthermore, a slot is provided on the lower end of the outer wall of the connecting groove, and a latch is provided in the slot, the latch being elastic.

[0023] Furthermore, the syringe connector according to this utility model may also include a syringe seat, which is sleeved on the lower section of the connector body, and an external thread is provided on the outer wall of the syringe seat; an ear is provided extending outward from the upper end of the syringe seat, and the ear is used to connect with the slot.

[0024] In a preferred embodiment, the upper end of the syringe holder extends inward with a locking platform for engaging and securing with the connector body.

[0025] After the syringe connector of this utility model is installed on the syringe, the fluid passage is opened by triggering the first sealing element. It can play a sealing and protective role during the preparation, dispensing and transfer of medicine in the syringe, effectively preventing the liquid from dripping and evaporating, and playing a safety protection role for medical personnel and the environment. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of the syringe connector according to the first embodiment of the present invention.

[0027] Figure 2 This is a schematic diagram of the split structure of the syringe connector according to the first embodiment of the present invention.

[0028] Figure 3 This is a cross-sectional view of the syringe connector according to the first embodiment of the present invention.

[0029] Figure 4 This is a three-dimensional structural diagram of the connector body according to the first embodiment of the present invention.

[0030] Figure 5 This is a cross-sectional structural schematic diagram of the connector body according to the first embodiment of the present invention.

[0031] Figure 6 This is a three-dimensional structural diagram (upright) of the first sealing member according to the first embodiment of the present invention.

[0032] Figure 7 This is another three-dimensional structural diagram (inverted) of the first sealing member according to the first embodiment of the present invention.

[0033] Figure 8 This is a cross-sectional structural diagram of the first sealing member according to the first embodiment of the present invention.

[0034] Figure 9 This is a three-dimensional structural diagram of the sealing rod according to the first embodiment of the present invention.

[0035] Figure 10 This is a cross-sectional structural schematic diagram of the sealing rod according to the first embodiment of the present invention.

[0036] Figure 11 This is a three-dimensional structural diagram of the syringe holder according to the first embodiment of the present invention.

[0037] Figure 12 This is a cross-sectional view of the syringe holder according to the first embodiment of the present invention.

[0038] Figure 13 A cross-sectional view of the syringe connector according to the second embodiment of the present invention.

[0039] Figure 14 A cross-sectional view of the syringe connector according to the third embodiment of the present invention.

[0040] Figure 15A cross-sectional view of the syringe connector according to the fourth embodiment of the present invention.

[0041] Figure 16 According to the schematic diagram of the upper and lower connecting devices of the syringe connector of this utility model, (a) is a schematic diagram of the split structure, and (b) is a schematic diagram of the assembled cross-sectional structure. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0043] The terms "upper end" and "lower end" used in this article refer only to the orientation of the components in the attached diagram. Ordinal numbers such as "first" and "second" preceding component names in the following text are for distinction only and do not represent importance or other meanings.

[0044] Figure 1-12 A syringe connector according to a first embodiment of the present invention is shown.

[0045] See details Figure 1-3 The syringe connector 200 mainly includes a connector body 210 and a sealing assembly. The sealing assembly includes a first seal 220 and a sealing rod 230. In some cases, the syringe connector 200 may also include a syringe seat 240.

[0046] See details Figure 4-5 The connector body 210 has a central channel 211. A sealing rod fixing member 215 for securing the lower end of the sealing rod 230 is provided in the upper section of the central channel 211. The upper end of the connector body 210 has a sealing member snap-fit ​​part 216. A connecting groove 213 extends outward from the upper section of the connector body 210, and an internal thread 214 is provided on the inner wall of the connecting groove 213. A gripping part 217 is provided on the outer wall of the connecting groove 213; the gripping part 217 can be a raised strip or other rough surface. The operator rotates the connector body 210 through the gripping part 217 to tighten or loosen it with the upper and lower connecting devices. A retaining groove 218 is also provided on the outer wall of the connecting groove 213, and a retaining tongue 219 is provided in the retaining groove 218; the retaining tongue 219 is elastic. The lower part 212 of the connector body is designed as a standard Luer connector structure, that is, the lower section of the central channel 211 is tapered.

[0047] See details Figure 6-10 The sealing rod 230 has an umbrella-shaped rod head 231, a rod body 232, and a rod foot 234. The umbrella-shaped rod head has an enlarged portion 231. The rod foot 234 is fixed to the sealing rod fixing member 215 in the central channel 211 by a snap-fit ​​member. The rod body 232 is provided with a groove 233 for engaging with the first sealing member 220.

[0048] The first seal 220 has a central first shaft hole 227 for fitting the rod body 232 of the sealing rod 230. The first seal 220 includes an inner ring 221, a middle ring 222, and an outer ring 223, which are interconnected. A fluid passage 226 is formed between the inner ring 221 and the middle ring 222. The outer ring 223 is used to connect with the sealing snap-fit ​​portion 216 of the connector body 210. The enlarged portion 231 of the sealing rod 230 is used to cover the upper opening 225 of the fluid passage 226. An annular surface 224 is formed on the upper edge of the first seal 220.

[0049] See details Figure 11-12 The syringe holder 240 is used to connect the syringe 300. The syringe holder 240 is sleeved around the outer periphery of the lower part 212 of the connector body. The upper end of the syringe holder 240 extends inwardly and is provided with a locking head 244 for engaging with the connector body 210. The locking head 244 has spaced-apart separation grooves 245 around its circumference, which provide a certain degree of elasticity, facilitating engagement between the syringe holder 240 and the corresponding grooves on the lower part 212 of the connector body. The upper end of the syringe holder 240 extends outwardly and is provided with multiple ears 243, which engage with the locking grooves 218 of the connector body 210. The lower outer wall of the syringe holder 240 is provided with external threads 242 for connection with the syringe 300. Normally, after the syringe holder 240 is fitted onto the connector body 210, the ear 243, blocked by the latch 219, allows the syringe holder 240 to rotate independently around the connector body 210. This allows the lower part of the syringe holder 240 to be screwed tightly connected to other Luer connectors, preventing the rotation of the syringe holder 240 from affecting the movement of the connector body 210. In some cases, the syringe holder 240 can also be axially pushed, causing the ear 243 to engage with the slot 218, thereby allowing the syringe holder 240 and the connector body 210 to rotate together.

[0050] In other embodiments, the syringe holder 240 may be omitted, and an external thread for connecting the syringe may be directly formed on the lower outer wall of the connector body 210.

[0051] Figure 13 A syringe connector according to a second embodiment of the present invention is shown.

[0052] In the second embodiment, the syringe connector 200 includes a connector body 210 and a sealing assembly. The sealing assembly includes a sealing rod 230, a first sealing element 220, and a limiting element 260. The structure of the connector body 210 and the sealing rod 230 is basically the same as in the first embodiment. The sealing rod 230 is fixed to the upper end of the central channel 211. A fluid passage 226 is formed in the first sealing element 220. The upper opening of the fluid passage 226 is closed by the top of the sealing rod 230. The upper end of the first sealing element 220 extends outward to form an annular surface 224. The limiting element 260 is fixedly disposed in the middle of the first sealing element 220. A groove 250 is formed in the central channel 211. When the annular surface 224 is subjected to downward pressure, the first sealing element 220 can slide downward along the groove 250, thereby opening the fluid passage 226. When the pressure disappears, the first sealing element 220 slides upward along the groove 250 by elastic force, thereby closing the fluid passage 226.

[0053] Figure 14 A syringe connector according to a third embodiment of the present invention is shown.

[0054] In the third embodiment, the syringe connector 200 includes a connector body 210 and a sealing assembly. The connector body 210 has a central channel 211. The sealing assembly includes a first seal 220, a needle body 270, and a limiting member 260. The needle body 270 is fixedly disposed at the upper end of the central channel 211. The needle body 270 has an axial channel that forms a fluid passage 226. The first seal 220 wraps around the outer periphery of the needle body 270, and its upper end extends outward to form an annular surface 224. The limiting member 260 is fixedly disposed in the middle of the first seal 220. When the annular surface 224 is subjected to downward pressure, the tip of the needle body 270 pierces the first seal 220, opening the fluid passage 226. When the pressure disappears, the first seal 220 returns to its original position by elasticity and wraps around the needle body 270, thereby closing the fluid passage 226.

[0055] Figure 15 A syringe connector according to a fourth embodiment of the present invention is shown.

[0056] In the fourth embodiment, the syringe connector 200 includes a connector body 210 and a sealing assembly. The connector body 210 has a central channel 211. The sealing assembly includes a first seal 220 and a second seal 280. The first seal 220 forms a fluid passage 226. The upper part of the first seal 220 has an annular surface 224. The middle part of the first seal 220 has a limiting member 260, which abuts against the upper end face of the central channel 211. The second seal 280 is disposed below the first seal 220, and the upper end face of the second seal 280 forms a snap-fit ​​seal with the inner wall of the central channel 211. When the annular surface 224 is subjected to downward pressure, the first seal 220 presses down on the second seal 280, opening the fluid passage 226. When the pressure disappears, the first seal 220 and the second seal 280 return to their original positions by elasticity, thereby closing the fluid passage 226. In this embodiment, the first seal 220 and the second seal 280 can also be integrally formed. The middle part of the fluid passage 226 can also be an open structure, which can be sealed when connected to the inner wall of other Luer joints.

[0057] The features in the above embodiments can be used interchangeably without conflict. For example, the sealing snap-fit ​​portion 216 in the first embodiment can replace the limiting member 260 in other embodiments; that is, the limiting member 260 can be omitted and directly formed from the upper end of the second connector body 210. The connecting groove 213 and syringe seat 240 in the first embodiment are also applicable to other embodiments.

[0058] See Figure 16 The syringe connector 200 of this invention has Luer connector structures at both ends. Preferably, the upper end is a male Luer connector structure and the lower end is a female Luer connector structure. The upper end of the syringe connector 200 is used to connect to the drug delivery device 100, which includes various adapters and drug delivery lines. The connector 101 of the drug delivery device 100 has a mating Luer connector structure. The lower end of the syringe connector 200 is used to connect to the syringe 300. The syringe 300 is an injection syringe with the injection needle removed, including a barrel and a piston assembly located in the barrel. The front end 301 of the barrel has a standard Luer connector structure for locking and sealing with the connector body 210 and the syringe seat 240. The syringe 300 draws or injects drug through the up-and-down movement of the piston assembly. The syringe 300 can adopt an existing standard syringe structure or other non-standard structures, as long as it can achieve a sealed connection with the syringe connector 200 and has aspiration and injection functions.

[0059] After the syringe connector 200 of this utility model is installed on the syringe 300, the fluid passage is opened by triggering the first sealing element 220. During the process of dispensing, taking and transferring medicine in the syringe 300, it can play a sealing and protective role, effectively preventing the liquid from dripping and evaporating, and playing a safety protection role for medical personnel and the environment.

[0060] The above embodiments are only used to illustrate and not limit the technical solutions of this utility model. Although the above embodiments have described the utility model in detail, those skilled in the art should understand that modifications or equivalent substitutions can be made to the utility model, but any modifications and partial substitutions that do not depart from the spirit and scope of the utility model should be covered within the scope of the claims of the utility model.

Claims

1. A syringe adapter, a lower end of which is adapted to connect to a syringe, characterized in that, include: The connector body (210) has a vertical central channel (211); A sealing assembly is provided at the upper end of the central channel (211). A fluid passage (226) is formed in the sealing assembly. The sealing assembly contains a first seal (220). The first seal (220) controls the opening and closing of the fluid passage (226). When the first seal (220) is subjected to downward pressure, the fluid passage (226) is opened. When the pressure is removed, the first seal (220) returns to its original position by its own elastic rebound and closes the fluid passage (226).

2. The syringe adapter of claim 1, wherein, The sealing assembly includes: A sealing rod (230) is fixedly installed in the central channel (211) of the connector body (210), and the upper end of the sealing rod (230) has an enlarged portion (231); A first sealing element (220) is disposed on the outer periphery of the sealing rod (230), with its upper end abutting against the enlarged portion (231) of the sealing rod (230) and extending outward to form an annular surface (224); a fluid passage (226) is formed in the first sealing element (220), the upper end of the fluid passage (226) being closed by the enlarged portion (231) of the sealing rod (230); the lower end of the fluid passage (226) is connected to the central channel (211); When the annular surface (224) is subjected to downward extrusion force, the fluid passage (226) is opened; when the extrusion force is removed, the first seal (220) returns to its original position by its own elastic rebound, closing the fluid passage (226).

3. The syringe adapter of claim 1, wherein, The sealing assembly includes: The needle body (270) is fixedly disposed at the upper end of the central channel (211) of the connector body (210); the needle body (270) has an axial channel that forms a fluid passage (226); The first sealing element (220) is wrapped around the outer periphery of the needle body (270), and its upper end extends outward to form an annular surface (224); When the annular surface (224) is subjected to downward pressure, the tip of the needle (270) pierces the first seal (220) and opens the fluid passage (226); when the pressure is removed, the first seal (220) returns to its original position due to its own elasticity, and the tip of the needle (270) returns to the inside of the first seal (220) and closes the fluid passage (226).

4. The syringe adapter of claim 1, wherein The sealing assembly includes: The first seal (220) has a fluid passage (226); the upper part of the first seal (220) has an annular surface (224); The second seal (280) is disposed below the first seal (220) and seals the central channel (211); When the annular surface (224) is subjected to downward extrusion force, the first seal (220) presses down on the second seal (280) to open the fluid passage (226); when the extrusion force is removed, the first seal (220) and the second seal (280) rely on their own elastic rebound to reset and close the fluid passage (226).

5. The syringe adapter of claim 1, wherein The upper end of the connector body (210) forms a male Luer connector structure, and the lower end of the connector body (210) forms a female Luer connector structure.

6. The syringe connector according to claim 5, characterized in that, The upper section of the connector body (210) extends outward with a connecting groove (213), and the inner wall of the connecting groove (213) is provided with an internal thread (214).

7. The syringe adapter of claim 6, wherein, A gripping part (217) is provided on the outer wall of the connecting groove (213).

8. The syringe adapter of claim 7, wherein, A slot (218) is also provided on the lower end of the outer wall of the connecting groove (213), and a latch (219) is provided in the slot (218), and the latch (219) is elastic.

9. The syringe adapter of claim 8, wherein, It also includes a syringe holder (240), which is fitted onto the lower section of the connector body (210). The syringe holder (240) has an external thread (242) on its outer wall. The upper end of the syringe holder (240) extends outward and has an ear (243) for connecting with the slot (218).

10. The syringe adapter of claim 9, wherein, The syringe holder (240) has a locking platform (244) extending inward from the upper end, which is used to lock and fix it to the connector body (210).

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