A syringe and its adapter

Abstract

The present invention discloses a syringe and its adapter, wherein the adapter is a tubular structure, and the adapter includes a fixing part, a limiting part and a screw-on cap part which are sequentially distributed along the axial direction, the fixing part is used to cooperate with the outer wall of the syringe barrel, the limiting part is located on the inner side of the adapter and is used to limit and engage with the shoulder of the syringe barrel of the syringe, the screw-on cap part is used to surround the outer periphery of the cone of the syringe barrel and is provided with a locking structure for fixing the protective cap, and a fixing glue is provided between the inner wall of the fixing part and the outer wall of the syringe barrel. When the adapter of this scheme is assembled with the syringe, the fixing part cooperates with the outer wall of the syringe barrel to ensure coaxial positioning, the limiting part and the shoulder of the syringe barrel are limited and engaged to ensure the axial positioning of the adapter and the syringe, and at the same time, the fixing part and the outer wall of the syringe barrel are glued and fixedly connected by the fixing glue, which ensures the connection firmness between the adapter and the syringe barrel, makes the adapter not easy to loosen, and improves the reliability of the product.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a syringe and an adapter thereof. Background Art

[0002] Syringes with Luer lock connectors are more suitable for filling and using viscous liquid medicines, and the market demand for this product has increased significantly in recent years. Since some syringes are made of glass and cannot be arbitrarily processed, if they are to be made into products with Luer lock connectors, an adapter with internal threads must be installed on the cone of the glass jacket. The adapter is used in conjunction with the protective cap to seal the syringe.

[0003] According to current market research, the biggest problem with syringes with Luer lock connectors during use is the connection strength between the adapter and the glass syringe jacket. Clinical accidents such as the adapter becoming loose or even falling off often occur during use.

[0004] Therefore, how to securely connect the adapter to the syringe is a technical problem that those skilled in the art currently need to solve. Summary of the invention

[0005] In view of this, an object of the present invention is to provide an adapter that can be effectively fixed to a syringe and is not easy to loosen. Another object of the present invention is to provide a syringe including the adapter.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] An adapter, which is a cylindrical structure, includes a fixing part, a limiting part and a screw-on cap part which are sequentially distributed along the axial direction, wherein the fixing part is used to cooperate with the outer wall of the syringe barrel, the limiting part is located on the inner side of the adapter and is used to limit and engage with the shoulder of the syringe barrel of the syringe, the screw-on cap part is used to surround the outer periphery of the cone portion of the syringe barrel and is provided with a locking structure for fixing a protective cap, and fixing glue is provided between the inner wall of the fixing part and the outer wall of the syringe barrel.

[0008] Preferably, the inner wall of the fixing portion is provided with a first glue groove for accommodating the fixing glue.

[0009] Preferably, the outer wall of the fixing portion is provided with a glue injection hole communicating with the first glue groove.

[0010] Preferably, a second glue groove for accommodating the fixing glue is provided on the inner side of the outer port of the fixing part.

[0011] Preferably, the inner wall of the fixing portion is provided with a plurality of ribs.

[0012] Preferably, the limiting part is a snap ring structure, which includes a shoulder limiting surface for limiting and abutting against the shoulder of the syringe, and the other side of the snap ring structure facing the open end of the screw-on cap part is a protective cap limiting surface, and the fixing glue is provided between the inner ring of the snap ring structure and the tapered part of the syringe.

[0013] Preferably, a plurality of ribs are provided on the outer circumference of the adapter, or the outer circumferential surface of the adapter is a frosted surface.

[0014] Preferably, the fixed part is connected to an elongated sleeve for cooperating with the outer wall of the syringe, and the end of the elongated sleeve is provided with a handle protruding outwards.

[0015] Preferably, the extended sleeve is provided with an observation hole extending in the axial direction, and the edge of the observation hole is provided with scale lines.

[0016] The adapter provided by the present invention is a cylindrical structure, and the adapter includes a fixing part, a limiting part and a screw-on cap part which are sequentially distributed along the axial direction, the fixing part is used to cooperate with the outer wall of the syringe barrel, the limiting part is located on the inner side of the adapter and is used to limit and engage with the shoulder of the syringe barrel of the syringe, the screw-on cap part is used to surround the outer periphery of the cone of the syringe barrel and is provided with a locking structure for fixing the protective cap, and a fixing glue is provided between the inner wall of the fixing part and the outer wall of the syringe barrel. When the adapter of this scheme is assembled with the syringe, the fixing part cooperates with the outer wall of the syringe barrel to ensure coaxial positioning, the limiting part and the shoulder of the syringe barrel are limited and engaged to ensure the axial positioning of the adapter and the syringe, and at the same time, the fixing part and the outer wall of the syringe barrel are glued and fixedly connected by fixing glue, which ensures the connection firmness between the adapter and the syringe barrel, makes the adapter not easy to loosen, and improves the reliability of the product.

[0017] The present invention also provides a syringe comprising the above adapter. The derivation process of the beneficial effects produced by the syringe is generally similar to the derivation process of the beneficial effects brought by the above adapter, so it will not be repeated herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the assembly structure of the adapter and the syringe in a specific embodiment of the present invention;

[0020] Figure 2 It is a schematic diagram of the first gluing position of the adapter and the syringe in a specific embodiment of the present invention;

[0021] Figure 3 It is a schematic diagram of the second gluing position of the adapter and the syringe in a specific embodiment of the present invention;

[0022] Figure 4 It is a schematic diagram of the third gluing position of the adapter and the syringe in a specific embodiment of the present invention;

[0023] Figure 5 It is a schematic diagram of the assembly structure of an adapter with ribs in a specific embodiment of the present invention;

[0024] Figure 6 It is a schematic diagram of the assembly structure of an adapter with an extended sleeve in a specific embodiment of the present invention;

[0025] Figure 7 It is a schematic diagram of the assembly structure of an adapter with transverse ribs in a specific embodiment of the present invention;

[0026] Figure 8 It is a schematic diagram of the assembly structure of an adapter with longitudinal ribs in a specific embodiment of the present invention.

[0027] Figures 1 to 8 middle:

[0028] 1-syringe, 2-syringe shoulder, 3-syringe cone, 4-cone inner hole, 5-cone outer circumference, 6-screw cap outer surface, 7-screw cap inner surface, 8-thread, 9-fixed part outer surface, 10-first glue groove, 11-glue injection hole, 12-fixed part inner surface, 13-rib, 14-second glue groove, 15-cap limiting surface, 16-shoulder limiting surface, 17-clamp injection surface, 18-transverse rib, 19-longitudinal rib, 20-frosted surface, 21-observation hole, 22-scale line, 23-handle. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Please refer to Figures 1 to 8 The present invention provides an adapter, which is a cylindrical structure and is applied to a syringe. The syringe comprises a syringe 1, a syringe shoulder 2 and a syringe cone 3. The syringe cone 3 comprises a cone inner hole 4 and a cone outer peripheral surface 5. Figure 1As shown, the adapter includes a fixing part, a limiting part and a cap screwing part which are sequentially distributed along the axial direction. The fixing part is used to cooperate with the outer wall of the syringe barrel 1 of the syringe. The limiting part is located on the inner side of the adapter and is used to limit and snap-fit ​​with the syringe shoulder 2 of the syringe. The cap screwing part is used to surround the outer periphery of the syringe cone 3 of the syringe and is provided with a locking structure for fixing the protective cap. The locking structure can be designed as a buckle or a thread 8. In this scheme, the thread 8 is used as the locking structure. A fixing glue is provided between the inner wall of the fixing part and the outer wall of the syringe 1. When the adapter of this scheme is assembled with the syringe, the fixing part cooperates with the outer wall of the syringe 1 to ensure coaxial positioning, and the limiting part is limited and snap-fitted with the syringe shoulder 2 to ensure the axial positioning of the adapter and the syringe 1. At the same time, the fixing part and the outer wall of the syringe 1 are glued and fixedly connected by fixing glue, which ensures the connection firmness between the adapter and the syringe barrel, makes the adapter not easy to loosen, and improves the product reliability.

[0031] Please refer to Figure 1 The fixing part includes an outer surface 9 of the fixing part and an inner surface 12 of the fixing part. The inner surface 12 of the fixing part is used for radial (coaxial) positioning of the adapter. A first glue groove 10 for accommodating the fixing glue is provided on the inner surface 12 of the fixing part, that is, the inner wall of the fixing part. Further preferably, a glue injection hole 11 communicating with the first glue groove 10 is provided on the outer wall of the fixing part to facilitate glue injection after assembly. Figure 3 Of course, the present solution may not be provided with the glue injection hole 11. When there is no glue injection hole 11, the fixing glue is firstly applied to the first glue groove 10, and then assembled and fixed.

[0032] Further preferably, the inner side of the outer port of the fixing part is also provided with a second glue groove 14 for accommodating the fixing glue. Figure 4 As shown, a fixing glue is also provided at the outer end of the fixing part, that is, the tail end, which can further enhance the fixing effect between the fixing part and the syringe 1. Ribs 13 can be provided on the inner surface 12 of the fixing part, such as Figure 5 As shown, the ribs 13 can also function as glue grooves.

[0033] It should be noted that the inner surface 12 of the fixing portion and the outer wall of the syringe 1 may be formed in a transition fit or an interference fit.

[0034] like Figure 1 As shown, preferably, the limiting part is a clamping ring structure, and the clamping ring structure includes a shoulder limiting surface 16 for limiting contact with the syringe shoulder 2, which is used for axial positioning of the adapter; the other side of the clamping ring structure facing the open end of the cap screwing part is a protective cap limiting surface 15, which is used to limit the depth of the protective cap screwed into the adapter, and a fixing glue is provided between the inner ring of the clamping ring structure and the syringe cone 3, and the inner ring of the clamping ring structure is the clamping ring glue injection surface 17, as shown in FIG. Figure 2The screw cap part comprises an outer surface 6 of the screw cap part and an inner surface 7 of the screw cap part. The inner surface 7 of the screw cap part is provided with a thread 8 for connecting and fixing with a thread head protective cap.

[0035] During assembly, glue is first applied to the first glue groove 10, the second glue groove 14, the rib 13 or the glue injection surface 17 of the clamping ring, and then assembled and fixed.

[0036] It should be noted that the first glue groove 10 , the second glue groove 14 , the ribs 13 and the glue injection surface 17 of the snap ring can be annular or discrete grooves.

[0037] Since the adapter in the prior art is relatively short, medical staff can only pinch the outer surface of the adapter with two fingers when screwing the cap, which is inconvenient to operate. And since the outer surface of the adapter is designed with hard ribs, hand fatigue or discomfort will occur after continuously screwing the cap. In order to solve this technical problem, the fixed part of the adapter provided in the present solution can greatly extend the length of the original adapter. When screwing the cap, medical staff can hold the outer surface of the adapter with their palms, which increases the contact area between the hand and the outer surface of the adapter, making the operation convenient and improving the comfort. In order to further improve the comfort of screwing the cap, preferably, the outer periphery of the adapter is provided with a plurality of ribs, or the outer peripheral surface of the adapter is a frosted surface 20. It should be noted that the ribs arranged on the outer periphery of the adapter can be designed as longitudinal ribs 19 extending along the length direction of the syringe 1 (such as Figure 8 As shown), it can also be designed as a transverse rib 18 perpendicular to the length direction of the syringe 1 (as shown Figure 7 shown).

[0038] The outer surface 6 of the screw cap part and the outer surface 9 of the fixing part should be coaxial, and the outer surface 6 of the screw cap part and the outer surface 9 of the fixing part can overlap (such as Figures 2 to 5 ), or they may not be on the same plane (such as Figure 1 The outer surface 6 of the screw cap part and the outer surface 9 of the fixing part may be provided with transverse ribs 18 of the handle, longitudinal ribs 19 or a frosted surface 20.

[0039] Since the contact area between the adapter and the cone 3 of the syringe in the prior art is relatively small, it is not conducive to ensuring coaxiality during assembly. The existing adapter is stuck in the cone 3 of the syringe barrel, which limits the length (area) of contact between the rubber inside the protective cap and the outer wall of the cone 3 of the syringe, which is not conducive to ensuring sealing. The inner surface 12 of the fixed part in this solution contacts the outer wall of the syringe 1 over a large area, which can be a transition fit or an interference fit, which is conducive to ensuring coaxiality, and the adapter does not need to be stuck in the cone 3 of the syringe barrel, and a protective cap with a longer thread and inner core can be used, so that the product has good sealing.

[0040] The handle of the glass syringe in the prior art is at the end of the syringe, which is because glass products cannot be processed into any shape. In fact, due to the influence of hand size, the handle of some specifications of syringes is most suitable in the middle of the syringe. In order to facilitate the injection operation of medical staff, such as Figure 6 As shown, preferably, the fixed part is connected with an extended sleeve for cooperating with the outer wall of the syringe 1, and the end of the extended sleeve is provided with a handle 23 protruding outward. It should be noted that along the length direction of the syringe 1, the inner wall of the extended sleeve can be provided with a plurality of annular rubber grooves or longitudinal rubber grooves, and fixedly connected with the outer periphery of the syringe 1 by fixing glue.

[0041] Further preferably, the extended sleeve is provided with an observation hole 21 extending in the axial direction, and the edge of the observation hole 21 is provided with a scale line 22. The observation hole 21 and the scale line 22 extending in the length direction of the syringe 1 can help medical staff to observe the infusion situation more conveniently.

[0042] The present invention has the following beneficial effects:

[0043] 1) The use of colloid fixation solves the problem of loose connection between the adapter and the glass syringe jacket;

[0044] 2) The adapter structure is longer than the existing adapter. When the medical staff twists the cap, they can hold the outer surface of the adapter with their palms, which is easy to operate and has a large contact area. There will be no hand discomfort after twisting the cap continuously.

[0045] 3) The adapter has a large area of ​​contact with the outer wall of the syringe, and is a transition fit or interference fit, which is beneficial to ensure coaxiality and make the product have good sealing.

[0046] 4) The adapter does not need to be stuck in the cone of the syringe, and can be used with protective caps with longer threads and inner cores, which is beneficial to the sealing of the product.

[0047] The present invention also provides a syringe comprising the above adapter. The derivation process of the beneficial effects produced by the syringe is generally similar to the derivation process of the beneficial effects brought by the above adapter, so it is not repeated herein. Preferably, the syringe provided by the present invention is specifically a glass syringe.

[0048] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An adapter, characterized in that: The adapter is a cylindrical structure, comprising a fixing part, a limiting part and a cap screwing part which are sequentially distributed along the axial direction, the fixing part being used to cooperate with the outer wall of the syringe barrel (1), the limiting part being located on the inner side of the adapter and being used to limit and engage with the syringe barrel shoulder (2) of the syringe, the cap screwing part being used to surround the outer periphery of the syringe barrel cone (3) and being provided with a locking structure for fixing the protective cap, and a fixing glue being provided between the inner wall of the fixing part and the outer wall of the syringe barrel (1); The inner wall of the fixing part is provided with a first glue groove (10) for accommodating the fixing glue, and the first glue groove (10) is an annular groove; The fixed part is connected to an extended sleeve for cooperating with the outer wall of the syringe (1), and the end of the extended sleeve is provided with a handle (23) protruding outwards; The extended sleeve is provided with an observation hole (21) extending in the axial direction, and a scale line (22) is provided on the edge of the observation hole (21).

2. The adapter according to claim 1, characterized in that: The outer wall of the fixing part is provided with a glue injection hole (11) which is in communication with the first glue groove (10).

3. The adapter according to claim 1, characterized in that: A second glue groove (14) for accommodating the fixing glue is provided on the inner side of the outer port of the fixing part.

4. The adapter according to claim 1, characterized in that: The inner wall of the fixing part is provided with a plurality of ribs (13).

5. The adapter according to claim 1, characterized in that: The limiting part is a snap ring structure, and the snap ring structure includes a shoulder limiting surface (16) for limiting contact with the shoulder (2) of the syringe, and the other side of the snap ring structure facing the open end of the screw cap part is a protective cap limiting surface (15), and the fixing glue is provided between the inner ring of the snap ring structure and the syringe cone (3).

6. The adapter according to claim 1, characterized in that: The outer circumference of the adapter is provided with a plurality of ribs, or the outer circumference of the adapter is a frosted surface (20).

7. A syringe, characterized in that: Comprising an adapter as claimed in any one of claims 1 to 6.

Images