An injection device

Abstract

The present invention discloses an injection device, including a syringe and a connector, wherein the syringe includes a body and a cylindrical head, wherein the head includes a mating surface, a limiting surface and a conical surface; the connector includes a tubular shell that is inserted into the head along the conical surface, a ring platform is provided on the inner wall of the shell facing the end of the syringe, a plurality of buckles that are evenly distributed along the ring platform and clamped to the mating surface are provided on the inner wall of the ring platform, an annular baffle that is clamped to the mating surface is provided between adjacent buckles on the inner wall of the ring platform, a gap that is connected to the inside of the shell is provided on the annular baffle, and the width of the gap is not greater than 0.4 mm, and the annular baffle, the mating surface, the buckle and the ring platform form a discretely distributed glue storage space along the inner wall of the shell, and the glue storage space is filled with curing glue. The present invention solves the problem of unreliable firmness of the syringe and the connector through dual fixation of locking mode and glue point mode, and improves the safety and reliability of the product.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and more particularly to an injection device. Background Art

[0002] Injection devices on the market are divided into various structural forms according to different uses. Among them, injection devices with threaded connectors are more suitable for products with high sealing requirements, and the market demand has increased significantly in recent years. Due to material restrictions, some injection devices cannot be arbitrarily processed in shape. If threaded connections are used, a connector must be installed on the head of the injection device.

[0003] One of the issues that affects the sealing of injection devices is the firmness between the connector and the syringe. Especially for products that are sterilized at high temperatures, there is a high risk that the connector will loosen or even fall off.

[0004] Therefore, how to solve the problem that the connection between the connector and the syringe is easily loosened is a problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0005] In view of this, an object of the present invention is to provide an injection device that adopts a dual fixing method of a locking method and a glue point method to improve the safety and reliability of the connection between the connector and the syringe.

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

[0007] An injection device comprises a syringe and a connector, wherein the syringe comprises a body and a cylindrical head, wherein the head comprises a matching surface, a limiting surface and a conical surface;

[0008] The connector includes a tubular shell that is inserted into the head along the conical surface, a ring platform is provided on the inner wall of the shell at one end facing the main body, the inner wall of the ring platform is provided with a plurality of buckles evenly distributed along the ring platform and clamped to the mating surface, the inner wall of the ring platform is provided with an annular baffle clamped to the mating surface between adjacent buckles, the annular baffle is provided with a gap connected to the interior of the shell, the width of the gap is not more than 0.4 mm, the annular baffle, the mating surface, the buckle and the ring platform form a glue storage space discretely distributed along the inner wall of the shell, and the glue storage space is filled with curing glue.

[0009] Preferably, the side of the buckle facing the mating surface is an arc surface that fits the mating surface.

[0010] Preferably, the number of the buckles is 2-6.

[0011] Preferably, the annular baffle is arranged at an end of the ring platform away from the syringe, and the cross-section of the annular baffle is rectangular or trapezoidal.

[0012] Preferably, the curing glue is UV glue.

[0013] Preferably, the inner side of the head extends outward from the body and is provided with a liquid delivery channel, a needle insertion channel and a glue groove for fixing the needle in sequence.

[0014] Preferably, the gap is provided at the connection between the annular baffle and the ring platform.

[0015] Preferably, the annular baffle is connected to the annular platform and the buckle respectively through ribs, so that the gaps are distributed at the connection between the annular baffle and the annular platform and at the connection between the annular baffle and the buckle.

[0016] Preferably, the annular baffle is arranged on the side of the ring platform away from the main body, the gap is arranged on the annular baffle along the radial direction of the shell, the outer end of the ring platform protrudes from the end of the shell, and the outer end of the ring platform has a plurality of injection grooves for injecting glue distributed along the circumference.

[0017] Preferably, the annular baffle is arranged on a side of the annular platform close to the main body, the gap is arranged on the annular baffle along the radial direction of the shell, and a long groove penetrating the gap is provided on the inner wall of the annular platform, and the width of the long groove is equal to the width of the gap.

[0018] In the injection device provided by the present invention, the housing of the connector is sleeved on the syringe along the conical surface of the syringe, and the connector is clamped on the matching surface of the syringe by means of a buckle, and the annular baffle between the buckles is also clamped on the matching surface, and the limiting surface on the syringe can prevent the connector from axially moving and disengaging, and the limiting surface can play a limiting role, thereby fixing the connector on the head of the injection device. In addition, the annular baffle, matching surface, buckle and ring stage on the connector form a glue storage space discretely distributed along the inner wall of the housing, and the glue storage space is filled with curing glue, thereby gluing the syringe and the connector together, and a gap connected to the interior of the housing is provided on the annular baffle, which can ensure that the curing glue fills the entire glue storage space, and the width of the gap is not greater than 0.4 mm, which can prevent the colloid from overflowing during the dispensing process.

[0019] In summary, the present invention significantly improves the firmness of the connection between the syringe and the connector through dual fixation by locking and glue dot. The syringe and the connector are fixed by locking, and the connector is tightly fixed on the syringe before glue dot, which is conducive to the glue dot process. The structure of the annular baffle and the gap is not only conducive to glue dot, but also can prevent the glue from flowing out, solves the problem of unreliable firmness between the syringe and the connector, and improves the safety and reliability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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 embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0021] Figure 1 A schematic diagram of a specific embodiment of the injection device provided by the present invention;

[0022] Figure 2 for Figure 1 A magnified schematic diagram of part A;

[0023] Figure 3 is a schematic diagram of a syringe;

[0024] Figure 4 is a schematic side view of the connector;

[0025] Figure 5 for Figure 4 A magnified schematic diagram of part B;

[0026] Figure 6 is a schematic cross-sectional view of the syringe and the connector at the connection of the curing glue;

[0027] Figure 7 It is a schematic diagram of the structure of the head of the syringe;

[0028] Figure 8 is a schematic diagram of a second embodiment of a gap;

[0029] Fig. 9 for Figure 8 A magnified schematic diagram of part C;

[0030] Fig.10 is a schematic diagram of a third embodiment of a gap;

[0031] Fig.11 is a schematic diagram of a fourth embodiment of a gap;

[0032] Fig.12 It is a schematic diagram of a connector of a fourth embodiment installed on a syringe;

[0033] Fig.13 is a schematic diagram of a connector with four buckles;

[0034] Fig.14 A schematic diagram of a connector with five clips.

[0035] Among them, 1-connector, 11-shell, 12-gap, 13-clip, 131-arc surface, 14-ring platform, 141-glue injection groove, 142-long groove, 15-annular baffle, 151-rib, 16-curing glue, 2-syringe, 21-body, 22-head, 221-conical surface, 222-limiting surface, 223-matching surface, 224-glue groove, 225-pin channel, 226-liquid delivery channel. DETAILED DESCRIPTION

[0036] 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.

[0037] The core of the present invention is to provide an injection device which adopts a locking method and a glue point method for dual fixation to improve the safety and reliability of the connection between the connector and the syringe.

[0038] Please refer to Figures 1 to 14 , Figure 1 A schematic diagram of a specific embodiment of the injection device provided by the present invention; Figure 2 for Figure 1 A magnified schematic diagram of part A; Figure 3 is a schematic diagram of a syringe; Figure 4 is a schematic side view of the connector; Figure 5 for Figure 4 A magnified schematic diagram of part B; Figure 6 is a schematic cross-sectional view of the syringe and the connector at the connection of the curing glue; Figure 7 It is a schematic diagram of the structure of the head of the syringe; Figure 8 is a schematic diagram of a second embodiment of a gap; Fig. 9 for Figure 8 A magnified schematic diagram of part C; Fig.10 is a schematic diagram of a third embodiment of a gap; Fig.11 is a schematic diagram of a fourth embodiment of a gap; Fig.12 It is a schematic diagram of a connector of a fourth embodiment installed on a syringe; Fig.13 is a schematic diagram of a connector with four buckles; Fig.14 A schematic diagram of a connector with five clips.

[0039] The injection device provided by the present invention comprises a syringe 2 and a connector 1, wherein the syringe 2 comprises a body 21 and a cylindrical head 22, wherein the head 22 comprises a mating surface 223, a limiting surface 222 and a conical surface 221;

[0040] The connector 1 includes a tubular shell 11 that is inserted into the head 22 along the conical surface 221. A ring platform 14 is provided on the inner wall of the shell 11 at one end facing the main body 21. The inner wall of the ring platform 14 is provided with a plurality of buckles 13 evenly distributed along the ring platform 14 and clamped to the mating surface 223. The inner wall of the ring platform 14 is provided with an annular baffle 15 clamped to the mating surface 223 between adjacent buckles 13. The annular baffle 15 is provided with a gap 12 that is connected to the interior of the shell 11. The width of the gap 12 is not more than 0.4 mm. The annular baffle 15, the mating surface 223, the buckle 13 and the ring platform 14 form a glue storage space discretely distributed along the inner wall of the shell 11, and the glue storage space is filled with curing glue 16.

[0041] Among them, the syringe 2 includes a body 21 and a head 22. The head 22 of the syringe 2 is connected to the connector 1. The head 22 includes a mating surface 223, a limiting surface 222 and a conical surface 221. The conical surface 221 is arranged at the outer wall of the head 22, so that the connector 1 can be put on the head 22 along the conical surface 221. The mating surface 223 is arranged at the inner end of the head 22. The mating surface 223 is a concave surface. The height difference between the mating surface 223 and the conical surface 221 forms a limiting surface 222, so that the buckle 13 on the connector 1 can be clamped on the mating surface 223, and the limiting surface 222 can prevent the connector 1 from axial movement.

[0042] The connector 1 includes a tubular shell 11, which is sleeved on the front end of the syringe 2 and fixedly connected to the syringe 2. The interior of the shell 11 is provided with an internal thread and the end of the shell 11 facing outward is completely open so as to be used to connect other components. A ring platform 14 is provided on the inner wall of the end of the shell 11 facing the syringe 2, and a plurality of buckles 13 are provided on the inner wall of the ring platform 14. The buckles 13 are clamped on the mating surface 223 of the syringe 2, and the plurality of buckles 13 are evenly distributed along the inner wall of the ring platform 14 to ensure uniform force between the connector 1 and the syringe 2.

[0043] An annular baffle 15 is also provided on the inner wall of the ring platform 14 between adjacent buckles 13. The annular baffle 15 is a thin plate. At the same time, the annular baffle 15 is also clamped on the mating surface 223 of the syringe 2. It should be pointed out that the function of the buckle 13 is to clamp the mating surface 223 to fix the connector 1, and the main function of the annular baffle 15 is to block the glue, so it can be clamped on the mating surface 223, or a gap 12 of no more than 0.4 mm can be left with the mating surface 223 to prevent glue leakage.

[0044] Specifically, the inner wall of the annular baffle 15 and the buckle 13 are on the same cylindrical surface, so that the annular baffle 15 and the buckle 13 are firmly attached to the matching surface 223 of the syringe 2. Thus, the annular baffle 15, the matching surface 223, the ring platform 14 and the buckle 13 form a plurality of spaced glue storage spaces along the inner wall of the housing 11, and the glue storage spaces are filled with fixing glue, so that the syringe 2 and the connector 1 are bonded and fixed together by the curing glue 16, further improving the reliability and safety of the connection between the syringe 2 and the connector 1.

[0045] In addition, the annular baffle 15 is provided with a gap 12 which is connected to the interior of the shell 11. The gap 12 can ensure the circulation of gas in the glue storage space, so that when the curing glue 16 is injected into the glue storage space, the curing glue 16 can be completely filled in the glue storage space, avoiding the formation of cavities in the glue due to the lack of air circulation during the injection of the glue. According to the viscosity of the glue, the width of the gap 12 is not more than 0.4 mm to ensure that the glue will not overflow from the gap 12.

[0046] In the injection device provided by the present invention, the housing 11 of the connector 1 is sleeved on the syringe 2 along the conical surface 221 of the syringe 2, and the connector 1 is clamped on the matching surface 223 of the syringe 2 through the buckle 13, and the annular baffle 15 between the buckles 13 is also clamped on the matching surface 223, and the limiting surface 222 on the syringe 2 can prevent the connector 1 from axially moving and disengaging, and the limiting surface 222 can play a limiting role, thereby fixing the connector 1 on the head 22 of the injection device. In addition, the annular baffle 15, the matching surface 223, the buckle 13 and the ring stage 14 on the connector 1 form a glue storage space discretely distributed along the inner wall of the housing 11, and the glue storage space is filled with curing glue 16, so that the syringe 2 and the connector 1 are glued and fixed together, and the annular baffle 15 is provided with a gap 12 connected to the inside of the housing 11, which can ensure that the curing glue 16 fills the entire glue storage space, and the width of the gap 12 is not greater than 0.4mm, which can prevent the glue from overflowing during the dispensing process.

[0047] In summary, the present invention significantly improves the firmness of the connection between the syringe 2 and the connector 1 through dual fixation by locking and glue dot. The syringe 2 and the connector 1 are fixed by locking, and the connector 1 is tightly fixed on the syringe 2 before glue dot, which is conducive to the glue dot process. The structure of the annular baffle 15 and the gap 12 is not only conducive to glue dot, but also can prevent the glue from flowing out, solves the problem of unreliable firmness between the syringe 2 and the connector 1, and improves the safety and reliability of the product.

[0048] On the basis of the above embodiment, considering the specific setting mode of the buckle 13, as a preferred embodiment, the side of the buckle 13 facing the mating surface 223 is a circular arc surface 131 that fits the mating surface 223. So that the circular arc surface 131 on the buckle 13 and the mating surface 223 on the syringe 2 can fit together firmly. Considering the specific number of buckles 13, on the basis of the above embodiment, as a preferred embodiment, the number of buckles 13 is 2 to 6. Of course, it can also be set to other numbers as needed.

[0049] On the basis of the above embodiment, considering the specific setting mode of the annular baffle 15, as a preferred embodiment, the annular baffle 15 is arranged at one end of the ring stage 14 away from the body 21. That is, in this embodiment, the annular baffle 15 is arranged at one end of the ring stage 14 away from the body 21, thereby increasing the volume of the glue storage space to increase the volume of the curing glue 16, thereby further improving the firmness of the adhesion between the syringe 2 and the connector 1. Considering the setting of the specific shape of the annular baffle 15, on the basis of the above embodiment, as a preferred embodiment, the cross-section of the annular baffle 15 is triangular, rectangular or trapezoidal.

[0050] On the basis of the above embodiment, considering the specific selection of the curing glue 16, as a preferred embodiment, the curing glue 16 is UV glue. Of course, other curing glues 16 can also be selected as needed. Considering the specific setting mode of the syringe 2, on the basis of the above embodiment, as a preferred embodiment, the inner side of the head 22 extends outward from the body 21 and is sequentially provided with a liquid delivery channel 226, a needle insertion channel 225 and a glue groove 224 for fixing the needle.

[0051] Based on any of the above embodiments, considering the specific way of setting the gap 12, as a preferred embodiment, the gap 12 is provided at the connection between the annular baffle 15 and the ring stage 14. That is, in this embodiment, the gap 12 is provided at the connection between the annular baffle 15 and the ring stage 14, specifically, the gap 12 runs through the connection between the annular baffle 15 and the ring stage 14, and the annular baffle 15 is only connected to the buckle 13.

[0052] In the second setting mode of the gap 12, the annular baffle 15 is connected to the ring platform 14 and the buckle 13 respectively through ribs 151, so that the connection between the annular baffle 15 and the ring platform 14 and the connection between the annular baffle 15 and the buckle 13 are respectively provided with gaps 12.

[0053] In the third arrangement mode of the gap 12, the annular baffle 15 is arranged on the side of the ring platform 14 away from the body 21, and the gap 12 is arranged on the annular baffle 15 along the radial direction of the shell 11. Specifically, the gap 12 is arranged in the middle of the annular baffle 15 along the radial direction of the shell 11. The outer end of the ring platform 14 protrudes from the end of the shell 11 to increase the volume of the glue storage space. The outer end of the ring platform 14 is circumferentially distributed with glue injection grooves 141 for glue injection. The number of the glue injection grooves 141 can be one or more, so that the glue can be injected from the glue injection grooves 141 into the glue storage space.

[0054] In the fourth setting method of the gap 12, the annular baffle 15 is arranged on the side of the ring platform 14 close to the main body 21, and the gap 12 is arranged on the annular baffle 15 along the radial direction of the shell 11. A long groove 142 that passes through the gap 12 is provided on the inner wall of the ring platform 14, so that glue can be injected into the glue storage space from the long groove 142. The width of the long groove 142 is equal to the width of the gap 12, so as to increase the length of the gap 12 and improve the air permeability of the gap 12.

[0055] The above is a detailed introduction to the injection device provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, the present invention can also be improved and modified without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. An injection device, characterized in that: The invention comprises a syringe (2) and a connector (1), wherein the syringe (2) comprises a body (21) and a cylindrical head (22), wherein the head (22) comprises a matching surface (223), a limiting surface (222) and a conical surface (221); The connector (1) comprises a tubular shell (11) which is inserted into the head (22) along the conical surface (221); a ring platform (14) is provided on the inner wall of one end of the shell (11) facing the body (21); the inner wall of the ring platform (14) is provided with a plurality of buckles (13) evenly distributed along the ring platform (14) and clamped to the mating surface (223); the inner wall of the ring platform (14) is provided with clamping holes between adjacent buckles (13). an annular baffle (15) on the mating surface (223), the annular baffle (15) being provided with a gap (12) communicating with the interior of the shell (11), the width of the gap (12) being no greater than 0.4 mm, the annular baffle (15), the mating surface (223), the buckle (13) and the annular platform (14) forming a glue storage space discretely distributed along the inner wall of the shell (11), the glue storage space being filled with curing glue (16); The annular baffle (15) is connected to the annular platform (14) and the buckle (13) respectively through ribs (151), so that the gaps (12) are distributed at the connection between the annular baffle (15) and the annular platform (14) and the connection between the annular baffle (15) and the buckle (13); or, The annular baffle (15) is arranged on a side of the annular platform (14) close to the body (21); the gap (12) is arranged on the annular baffle (15) along the radial direction of the shell (11); a long groove (142) penetrating the gap (12) is arranged on the inner wall of the annular platform (14); the width of the long groove (142) is equal to the width of the gap (12).

2. The injection device according to claim 1, characterized in that The side of the buckle (13) facing the matching surface (223) is an arc surface (131) that fits the matching surface (223).

3. The injection device according to claim 2, characterized in that The number of the buckles (13) is 2-6.

4. The injection device according to claim 1, characterized in that The annular baffle (15) is arranged at one end of the annular platform (14) away from the syringe (2), and the cross section of the annular baffle (15) is rectangular or trapezoidal.

5. The injection device according to claim 4, characterized in that The curing glue (16) is UV glue.

6. The injection device according to claim 1, characterized in that The inner side of the head (22) extends outward from the body (21) and is provided with a liquid delivery channel (226), a needle insertion channel (225) and a glue groove (224) for fixing the needle in sequence.

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