Needle-free connector for high-pressure radiography injector

Abstract

A needle-free connector for a high-pressure radiography syringe comprises a shell, the shell is provided with a hollow part and a connecting part, the hollow part is provided with an inner space, the connecting part is combined with one side of the hollow part, the connecting part is used for being connected with a sleeving part, the connecting part comprises a head section and a neck section, and the head section is connected with the neck section. A thread is arranged on the circumferential surface of the head section, and the neck section extends from the head section and is connected with the hollow part; wherein the connecting part is provided with a through hole, and the through hole penetrates through the head section and the neck section and is communicated with the internal space. Through the design of the neck section of the connecting part, the needle-free connector can be combined with a connector connecting base of a high-pressure radiography injector, and then the head section of the connecting part is provided with threads, so that the needle-free connector can also be suitable for a needle-free syringe, and therefore, the needle-free connector can be suitable for different syringes.

Description

Technical Field

[0001] The present utility model relates to medical apparatuses; in particular, it relates to a needleless connector for a high-pressure contrast injector. Background Art

[0002] Currently, commonly used needle syringes are widely applied in the medical industry, including vaccination, drug treatment, and sample extraction, etc.; however, when traditional needle syringes are in use, medical staff are often accidentally injured because the needles are exposed outside, making it easy for medical staff to be infected by the germs on the needles, thus posing a risk to health and hygiene; to avoid accidental injury to personnel by traditional needle syringes, relevant industries have developed needleless syringes to solve the technical problems of traditional needle syringes.

[0003] Currently, a needleless connector needs to be additionally configured during the actual use of a needleless syringe, and the needleless connector solves the risk of accidental injury to medical staff by the needle; however, the needleless connector is only applied to general medical operations. In a high-pressure contrast injection set, a high-pressure contrast injector is connected to an infusion tube for injection operations, and there are no relevant needleless connector accessories to be configured and used with the high-pressure contrast injector. Only a general standard needleless connector can be used, which may lead to the risk of detachment during infusion of the high-pressure contrast injector.

[0004] Therefore, the inventor of the present utility model has painstakingly conceived a needleless connector for a high-pressure contrast injector to improve the above problems. Summary of the Utility Model

[0005] In view of this, the purpose of the present utility model is to provide a needleless connector for a high-pressure contrast injector, to prevent the risk of detachment during the operation of the high-pressure contrast injector, and thus improve the overall safety.

[0006] To achieve the above object, the present utility model provides a needleless connector for a high-pressure contrast injector. The high-pressure contrast injector includes a needle and a connector seat. The connector seat has a needle receiving portion and a socket portion. The needle receiving portion is movably disposed on the needle. The needle receiving portion has a needle receiving space for the needle to extend therein. The socket portion is disposed at one end of the needle receiving portion. The socket portion has a receiving groove communicating with the needle receiving space, and the socket portion has a constricted section located above the receiving groove. The needleless connector includes a housing. The housing has a hollow portion and a connecting portion. The hollow portion has an internal space. The connecting portion is coupled to one side of the hollow portion. The connecting portion is used to connect the socket portion. The connecting portion includes a head section and a neck section. A thread is provided on the circumferential surface of the head section. The neck section extends from the head section and connects to the hollow portion. Wherein the connecting portion has a through hole that penetrates the head section and the neck section and communicates with the internal space. When the connecting portion is assembled with the socket portion of the connector seat, the head section extends into the receiving groove and the neck section is limited in the constricted section.

[0007] In one embodiment, the housing defines a center line passing through the internal space of the hollow portion and the through hole of the connecting portion. The housing has a conduit portion that extends out of the other side of the hollow portion along the center line. The conduit portion communicates with the internal space of the hollow portion.

[0008] In one embodiment, the side surface of the receiving groove has a first side opening. The side surface of the constricted section has a second side opening corresponding to and communicating with the first side opening. The first side opening allows the head section of the connecting portion to laterally enter the receiving groove. The second side opening allows the neck section of the connecting portion to laterally enter the constricted section. The diameter of the second side opening is greater than the outer diameter of the neck section and less than the outer diameter of the head section.

[0009] In one embodiment, the ratio between the outer diameter of the neck section and the diameter of the through hole at the inner side position of the neck section is between 1.3 and 1.5.

[0010] In one embodiment, an elastic valve body is included. The elastic valve body is disposed in the internal space of the housing. The elastic valve body has a concave hole along the center line direction. The elastic valve body forms a closed end and an open end at both ends of the concave hole. The closed end correspondingly penetrates into the through hole. The open end faces the conduit portion. The concave hole correspondingly communicates with the conduit portion. And the elastic valve body has a slit provided at the closed end and communicating with the concave hole.

[0011] In one embodiment, the hollow portion includes a lower housing portion and an upper housing portion. The lower housing portion and the upper housing portion are combined with each other. The lower housing portion is connected to the connecting portion. The lower housing portion is provided with a receiving groove communicating with the through hole, and the opening of the receiving groove faces the upper housing portion. The upper housing portion is connected to the conduit portion. The upper housing portion is provided with a groove communicating with the conduit portion. The opening of the groove corresponds to the receiving groove and faces the lower housing portion. And the open end of the elastic valve body abuts against the bottom of the groove. The groove and the receiving groove jointly define the internal space.

[0012] In one embodiment, a plurality of protrusions are arranged around the inner wall of the receiving groove of the lower housing portion along the center line. The plurality of protrusions are arranged adjacent to each other, and the outer wall of the elastic valve body abuts against the plurality of protrusions.

[0013] In one embodiment, a convex ring is arranged around the inner wall of the receiving groove of the lower housing portion along the center line. The outer wall of the elastic valve body abuts against the convex ring.

[0014] In one embodiment, the receiving groove has an abutting surface which is located at the bottom of the receiving groove and is connected to the through hole. The elastic valve body has a shoulder which is located between the open end and the closed end, and the shoulder correspondingly abuts against the abutting surface.

[0015] In one embodiment, the lower housing portion has a first engaging portion at the opening of the receiving groove, and the upper housing portion has a second engaging portion at the opening of the groove. The first engaging portion and the second engaging portion are correspondingly assembled.

[0016] In one embodiment, a screwing portion is provided around the conduit portion of the housing.

[0017] The effect of the present utility model is that the connecting portion of the needle-free connector includes the design of the head section and the neck section. When the needle-free connector is assembled with the high-pressure contrast injector, the connecting portion is sleeved on the socket portion of the connector socket, so that the head section extends into the receiving groove of the socket portion and the neck section is limited in the reduced diameter section. In this way, the high-pressure contrast injector can perform injection operations through the needle-free connector. In addition, the circumferential surface of the head section of the needle-free connector is provided with the thread structure, so that the needle-free connector can be screwed with a needle-free syringe through the head section of the connecting portion. Therefore, the needle-free connector can be commonly applied to the existing needle-free syringe and high-pressure contrast injector, saving the cost of purchasing various needle-free connector specifications by medical institutions and making inventory management more simple and convenient. Description of the Drawings

[0018] Figure 1Schematic diagram of the assembly of the needle-free connector and the high-pressure contrast injector according to a preferred embodiment of the present utility model.

[0019] Figure 2 Exploded view of the structure of the needle-free connector and the connector seat according to a preferred embodiment of the present utility model.

[0020] Figure 3 Exploded view of the structure of the needle-free connector according to a preferred embodiment of the present utility model.

[0021] Figure 4 Top view of the needle-free connector according to a preferred embodiment of the present utility model

[0022] Figure 5 is Figure 4 Cross-sectional view in the 5-5 direction of

[0023] Figure 6A is Figure 5 Cross-sectional view of the housing of the needle-free connector in

[0024] Figure 6B Cross-sectional view of the housing according to another embodiment of the present utility model.

[0025] Figure 7 Combined perspective view of the needle-free connector and the connector seat according to a preferred embodiment of the present utility model.

[0026] Figure 8 Combined top view of the needle-free connector and the connector seat according to a preferred embodiment of the present utility model.

[0027] Figure 9 is Figure 8 Cross-sectional view in the 9-9 direction of

[0028] Figure 10 Schematic diagram of the needle-free connector installed on the needle-free syringe according to another preferred embodiment of the present utility model.

[0029] Explanation of reference numerals:

[0030] 100: Needle-free connector

[0031] 10: Housing

[0032] 11: Hollow part

[0033] 111: Lower housing part

[0034] 111a: Accommodating groove

[0035] 111a1: Abutting surface

[0036] 111b: First engaging part

[0037] 111c: Protrusion

[0038] 111c’: Convex ring

[0039] 112: Upper shell part

[0040] 112a: Groove

[0041] 112b: Second joint part

[0042] 12: Connecting part

[0043] 121: Head section

[0044] 121a: Thread

[0045] 122: Neck section

[0046] 123: Perforation

[0047] 13: Conduit part

[0048] 14: Threaded joint part

[0049] 20: Elastic valve body

[0050] 21: Concave hole

[0051] 211: Closed end

[0052] 212: Open end

[0053] 22: Slit

[0054] 23: Shoulder

[0055] 200: High-pressure syringe

[0056] 210: Needle

[0057] 210a: External thread section

[0058] 220: Connector seat

[0059] 230: Needle housing part

[0060] 240: Socket part

[0061] 250: Receiving groove

[0062] 250a: First side opening

[0063] 260: Necking section

[0064] 260a: Second side opening

[0065] 300: Needleless syringe

[0066] 310: Nozzle

[0067] 320: Internal thread part

[0068] I: Inner space

[0069] L: Center line

[0070] S: Needle receiving space Detailed implementation manners

[0071] To more clearly illustrate the present utility model, preferred embodiments are cited below and described in detail in conjunction with the accompanying drawings. Please refer to Figures 1 to 2 As shown, the needle-free connector 100 of a preferred embodiment of the present utility model is used to be installed on a high-pressure syringe 200. The high-pressure syringe 200 includes a needle 210 and a connector seat 220. An external thread section 210a is spirally provided on the circumferential surface of the needle 210. The connector seat 220 has a needle receiving part 230 and a socket part 240. The needle receiving part 230 is movably arranged on the needle 210 by rotating along the external thread section 210a. The needle receiving part 230 has a needle receiving space S for the needle 210 to extend into. The socket part 240 is arranged at one end of the needle receiving part 230. As Figure 2 shown, the socket part 240 has a receiving groove 250 and a necking section 260. The receiving groove 250 communicates with the needle receiving space S. A first side opening 250a is provided on the side surface of the receiving groove 250. The necking section 260 is located above the receiving groove 250. A second side opening 260a is provided on the side surface of the necking section 260 corresponding to and communicating with the first side opening 250a.

[0072] Please cooperate with Figures 3 to 6A As shown, the needle-free connector 100 of this embodiment includes a housing 10 and an elastic valve body 20.

[0073] The housing 10 defines a center line L. The housing 10 has a hollow part 11, a connecting part 12, a conduit part 13 and a screwing part 14. The hollow part 11 includes a lower housing part 111 and an upper housing part 112. The lower housing part 111 and the upper housing part 112 are combined with each other. The lower housing part 111 has a receiving groove 111a, a first engaging part 111b and a plurality of bumps 111c. The receiving groove 111a is arranged along the center line L, and the opening of the receiving groove 111a faces the upper housing part 112. The first engaging part 111b is arranged at the opening of the receiving groove 111a. In this embodiment, the first engaging part 111b is recessed relative to the inner wall of the receiving groove 111a. The plurality of bumps 111c are arranged around the inner wall of the receiving groove 111a along the center line L, and the plurality of bumps 111c are arranged adjacent to each other (as Figure 6Aas shown in the figure; the upper shell portion 112 has a groove 112a and a second engaging portion 112b. The groove 112a is arranged along the center line L, and the opening of the groove 112a faces the lower shell portion 111 corresponding to the accommodating groove 111a. The second engaging portion 112b is arranged at the opening of the groove 112a. In this embodiment, the second engaging portion 112b protrudes downward relative to the opening of the groove 112a, and the first engaging portion 111b and the second engaging portion 112b are correspondingly assembled with each other, as Figure 5 shown in FIGS. 5 and 6, when the lower shell portion 111 and the upper shell portion 112 are combined, the groove 112a and the accommodating groove 111a jointly enclose an internal space I, that is, the center line L passes through the internal space I.

[0074] In other embodiments, the first engaging portion 111b and the second engaging portion 112b can be arranged in an interchangeable manner, and other assembling methods can also be adopted, such as tenon, buckle and other methods; or the housing 10 can be integrally formed to save the structures of the lower shell portion 111 and the upper shell portion 112.

[0075] Please refer to Figure 5 and Figure 6A as shown in the figure, the connecting portion 12 is combined with one side of the hollow portion 11 and connects to the lower shell portion 111. The connecting portion 12 is used to connect the socket portion 240. The connecting portion 12 includes a head section 121 and a neck section 122. A thread 121a is provided on the circumferential surface of the head section 121. The neck section 122 extends from the head section 121 and connects to the hollow portion 11; the connecting portion 12 has a through hole 123 along the center line L, and the through hole 123 penetrates through the head section 121 and the neck section 122 and communicates with the internal space I; please further cooperate with Figure 6A , the ratio between the outer diameter of the neck section 122 and the aperture diameter of the through hole 123 at the inner side position of the neck section 122 is 1.3 to 1.5. In this embodiment, the ratio between the outer diameter of the neck section 122 and the aperture diameter of the through hole 123 at the inner side position of the neck section 122 is 1.36. When the ratio D1 / D2 between the outer diameter of the neck section 122 and the aperture diameter of the through hole 123 at the inner side position of the neck section 122 is less than 1.3, the thickness of the neck section 122 is too thin and it is easy to cause the neck section 122 to break; when the ratio D1 / D2 between the outer diameter of the neck section 122 and the aperture diameter of the through hole 123 at the inner side position of the neck section 122 is greater than 1.5, the thickness of the neck section 122 is too thick or the through hole 123 is too small, which will cause the neck section 122 to be unable to enter the necking section 260 or the needle 210 to be unable to extend into the through hole 123, not meeting the product specifications of the joint connecting seat 220.

[0076] Please cooperate with Figure 3and Figure 5 As shown, the catheter portion 13 extends out of the other side of the hollow portion 11 along the center line L and is connected to the upper housing portion 112. The catheter portion 13 penetrates through the upper housing portion 112 and communicates with the internal space I of the hollow portion 11. The catheter portion 13 is used for externally connecting an infusion tube (not shown in the figure); the screwing portion 14 is disposed around the catheter portion 13. In this embodiment, the inner wall of the screwing portion 14 has an internal thread surface, and the screwing portion 14 is used for positioning the outer peripheral surface of the infusion tube (not shown in the figure).

[0077] Please continue to cooperate with Figure 3 and Figure 5 As shown, the elastic valve body 20 is disposed in the internal space I of the housing 10, and the outer wall of the elastic valve body 20 abuts against the plurality of bumps 111c of the lower housing portion 111. Wherein, the elastic valve body 20 is provided with a concave hole 21 along the direction of the center line L. The elastic valve body 20 generates a closed end 211 and an open end 212 at both ends of the concave hole 21. The closed end 211 correspondingly penetrates into the through hole 123, and the open end 212 faces the catheter portion 13 and abuts against the bottom of the groove 112a of the upper housing portion 112. The concave hole 21 correspondingly communicates with the catheter portion 13. As Figure 5 As shown, the elastic valve body 20 has a slit 22 and a shoulder 23. The slit 22 is disposed at the closed end 211 and communicates with the concave hole 21. Wherein, the slit 22 is normally in a closed state to prevent external bacteria or particles from entering the concave hole 21 through the slit 22 and preventing the elastic valve body 20 from being contaminated. The shoulder 23 is located between the open end 212 and the closed end 211, and the receiving groove 111a has a abutting surface 111a1. The abutting surface 111a1 is located at the bottom of the receiving groove 111a and is connected to the through hole 123. The shoulder 23 correspondingly abuts against the abutting surface 111a1.

[0078] The elastic valve body 20 is limited by the plurality of bumps 111c of the lower housing portion 111. When the elastic valve body 20 is compressed and deformed, the plurality of bumps 111c can prevent the elastic valve body 20 from deforming and shifting; and when the elastic valve body 20 elastically returns, due to the plurality of bumps 111c pressing against the elastic valve body 20, the elastic valve body 20 can quickly elastically return when rebounding and the slit 22 returns to the normal closed state to prevent liquid from leaking into the internal space I. In other embodiments, the foregoing bumps may also be formed into a convex ring 111c', as Figure 6BAs shown, the convex ring 111c' is disposed on the inner wall of the receiving groove 111a and is connected to the abutting surface 111a1. The outer wall of the elastic valve body 20 abuts against the convex ring 111c'. Therefore, the design of the convex ring 111c' can also achieve the effects of preventing the elastic valve body 20 from deforming and shifting and quickly elastically resetting.

[0079] Please refer again to Figure 1 , Figures 7 to 9 As shown, when the connecting portion 12 is actually assembled with the joint connecting seat 220, the head section 121 enters the receiving groove 250 laterally through the first side opening 250a, and the neck section 122 enters the reduced diameter section 260 laterally through the second side opening 260a. Since the diameter of the second side opening 260a is larger than the outer diameter of the neck section 122 and smaller than the outer diameter of the head section 121, in this way, the head section 121 can extend into the receiving groove 250 and the neck section 122 is limited in the reduced diameter section 260; Please refer again to Figure 1 As shown, when the needle-free connector 100 is assembled with the high-pressure syringe 200, the needle 210 extends into the needle receiving space S, and the needle receiving portion 230 can rotate relative to the needle 210 to drive the joint connecting seat 220 to descend, so that the needle 210 can enter the receiving groove 250 of the socket portion 240 and correspondingly penetrate into the through hole 123 of the connecting portion 12. When the needle 210 abuts against the closed end 211 of the elastic valve body 20, the slit 22 of the elastic valve body 20 is deformed and opened under the pressure of the needle 210, so that the needle 210 communicates with the concave hole 21 and the conduit portion 13 through the slit 22. Thereby, the needle 210 can be used for injection through the needle-free connector 100.

[0080] Please cooperate with Figure 10As shown, in another embodiment, the needle-free connector 100 is applicable to a configuration of a needle-free syringe 300. The needle-free syringe 300 has a nozzle 310 and an internal thread portion 320. The nozzle 310 is provided at one end of the needle-free syringe 300, and the internal thread portion 320 surrounds the nozzle 310. The thread 121a of the head section 121 can be rotatably arranged on the nozzle 310 along the internal thread portion 320. When the needle-free connector 100 is assembled with the needle-free syringe 300, the thread 121a of the head section 121 is screwed into the internal thread portion 320, and the needle-free connector 100 can rotate relative to the nozzle 310 and descend, so that the nozzle 310 can correspondingly penetrate into the through hole 123 of the connecting portion 12. When the nozzle 310 abuts against the closed end 211 of the elastic valve body 20, the slit 22 of the elastic valve body 20 is deformed and expanded under the pressure of the nozzle 310, so that the nozzle 310 communicates with the concave hole 21 and the conduit portion 13 through the slit 22. Thus, the needle-free syringe 300 can be used for injection through the needle-free connector 100.

[0081] Therefore, the connecting portion 12 of the needle-free connector 100 includes the design of the head section 121 and the neck section 122. When the needle-free connector 100 is assembled with the high-pressure syringe 200, the connecting portion 12 is sleeved on the socket portion 240 of the joint connecting seat 220, so that the head section 121 extends into the receiving groove 250 of the socket portion 240 and the neck section 122 is limited in the reduced diameter section 260. In this way, the high-pressure syringe 200 can perform injection operations through the needle-free connector 100. In addition, the circumferential surface of the head section 121 of the needle-free connector 100 is provided with the thread 121a structure, so that the needle-free connector 100 can be screwed to the needle-free syringe 300 through the head section 121 of the connecting portion 12. Therefore, the needle-free connector 100 can be commonly applicable to the existing needle-free syringe 300 and high-pressure syringe 200, saving the cost of purchasing various needle-free connector specifications by medical institutions and making inventory management simpler and more convenient.

[0082] The above are only the preferred and feasible embodiments of the present invention. All equivalent changes made by applying the description and claims of the present invention should be included within the patent scope of the present invention.

Claims

1. A needle-free connector for a high-pressure contrast injection syringe, characterized in that: The high-pressure contrast injection syringe comprises a needle and a joint connection seat, the joint connection seat has a needle-receiving portion and a sleeve connection portion, the needle-receiving portion is movably arranged on the needle, the needle-receiving portion has a needle-receiving space for the needle to extend into, the sleeve connection portion is arranged at one end of the needle-receiving portion, the sleeve connection portion has a receiving groove connected to the needle-receiving space, and the sleeve connection portion has a shrinking section located above the receiving groove, and the needle-free connector comprises: A shell having a hollow portion and a connecting portion, wherein the hollow portion has an internal space, the connecting portion is combined with one side of the hollow portion, and the connecting portion is used to connect the sleeve portion, the connecting portion includes a head section and a neck section, the circumferential surface of the head section is provided with a screw thread, the neck section extends from the head section and connects to the hollow portion; wherein the connecting portion has a through hole, the through hole passes through the head section and the neck section and communicates with the internal space; When the connecting portion is assembled with the sleeve portion of the joint connecting seat, the head section extends into the receiving groove and the neck section is limited in the necking section.

2. The needle-free connector for a high-pressure contrast injection syringe according to claim 1, characterized in that: The shell is defined with a center line passing through the internal space of the hollow part and the through hole of the connecting part. The shell has a conduit part, which extends out from the other side of the hollow part along the center line and is connected to the internal space of the hollow part.

3. The needle-free connector for a high-pressure contrast injection syringe according to claim 1, characterized in that: The side of the receiving groove has a first side opening, and the side of the necking section has a second side opening corresponding to the first side opening. The first side opening allows the head section of the connecting part to enter the receiving groove laterally, and the second side opening allows the neck section of the connecting part to enter the necking section laterally. The diameter of the second side opening is larger than the outer diameter of the neck section and smaller than the outer diameter of the head section.

4. The needle-free connector for a high-pressure contrast injection syringe according to claim 1, characterized in that: The ratio between the outer diameter of the neck segment and the diameter of the hole formed at the inner side of the neck segment is within a range of 1.3 to 1.

5.

5. The needle-free connector for a high-pressure contrast injection syringe according to claim 2, characterized in that: It includes an elastic valve body, which is arranged in the internal space of the shell, and the elastic valve body has a concave hole along the center line direction. The elastic valve body generates a closed end and an open end at both ends of the concave hole. The closed end correspondingly penetrates the through hole, and the open end faces the conduit part. The concave hole is correspondingly connected to the conduit part, and the elastic valve body has a slit arranged at the closed end and connected to the concave hole.

6. The needle-free connector for a high-pressure contrast injection syringe according to claim 5, characterized in that: The hollow portion includes a lower shell portion and an upper shell portion, the lower shell portion and the upper shell portion are combined with each other, the lower shell portion is connected to the connecting portion, the lower shell portion is provided with a receiving groove connected to the through hole, and the opening of the receiving groove faces the upper shell portion; the upper shell portion is connected to the conduit portion, the upper shell portion is provided with a groove connected to the conduit portion, the opening of the groove corresponds to the receiving groove and faces the lower shell portion, and the opening end of the elastic valve body rests on the bottom of the groove, and the groove and the receiving groove are jointly enclosed to form the internal space.

7. The needle-free connector for a high-pressure contrast injection syringe according to claim 6, characterized in that: The lower shell portion has a plurality of protrusions around the center line on the inner wall of the accommodating groove, the plurality of protrusions are arranged adjacent to each other, and the outer wall of the elastic valve body abuts against the plurality of protrusions.

8. The needle-free connector for a high-pressure radiographic injector according to claim 6, characterized in that: The lower shell portion has a convex ring around the inner wall of the accommodating groove along the center line, and the outer wall of the elastic valve body abuts against the convex ring.

9. The needle-free connector for a high-pressure radiographic injector according to claim 7 or 8, characterized in that: The accommodating groove has a supporting surface, which is located at the bottom of the accommodating groove and connected to the through hole; the elastic valve body has a shoulder, which is located between the opening end and the closed end, and the shoulder correspondingly abuts against the supporting surface.

10. The needle-free connector for a high-pressure radiographic injector according to claim 6, characterized in that: The lower shell part has a first combining portion at the opening of the accommodating groove, and the upper shell part has a second combining portion at the opening of the groove, and the first combining portion and the second combining portion are correspondingly assembled with each other.

11. The needle-free connector for a high-pressure contrast injection syringe according to claim 2, characterized in that: The shell is provided with a threaded connection portion around the conduit portion.

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