A cone cap assembly tool for pre-filled syringes

Abstract

The utility model discloses a kind of pre-filled packaging syringe cone head cap assembly tools, it is related to syringe assembly technical field, solve the problem of lacking small cone head cap assembly tool in prior art.The utility model includes base and gland, the base is equipped with insertion hole, insertion hole is provided with loading hole, gland is equipped with insertion column, insertion column is used to and insertion hole insertion joint cooperation;Loading hole is used to accommodate cap, insertion column is used to push into cap along axial sheath;The first limit surface is equipped between loading hole and insertion hole cooperation, the first limit surface is used to limit the insertion position of cap;The base is equipped with the second limit surface with gland cooperation, the second limit surface is used to limit the insertion depth of insertion column, accurate and reliability in assembly process are ensured.The tool adopts two-piece structure, occupies less space, simple structure, more convenient to use;Reduce the problem that may appear in manual assembly less than position, improve the stability and consistency of assembly.

Description

Technical Field

[0001] This utility model relates to the field of syringe assembly technology, and in particular to a tool for assembling a conical cap for a pre-filled syringe. Background Technology

[0002] The needle sheath of a pre-filled syringe consists of a rigid cap and a soft sheath at the opening of the rigid cap. During assembly, the needle tip of the syringe inserts into the soft sheath to achieve a seal and protection. During production assembly, the needle sheaths for the pre-filled syringes need to be assembled and tested. However, because the cap and needle sheath need to be assembled manually during testing, improper assembly can occur, affecting the seal between the cap and the syringe body, leading to deviations in test results and impacting product testing outcomes.

[0003] Chinese invention patent CN119159372A discloses an assembly device for an automatic injection pen of a pre-filled syringe, including a first base, a second base, a positioning component, and a pressing component. The positioning component is connected between the first and second bases and has a positioning groove for mounting the injection pen. The pressing component is slidably connected to the surface of the second base and can move relative to it. When the upper and lower pen barrels of the injection pen are placed in the positioning grooves, the side of the pressing plate abuts against the upper pen barrel. Pushing the pressing plate towards the upper pen barrel via a handle allows the upper and lower pen barrels to assemble the injection pen. Using this assembly device replaces conventional complex spatial positioning devices for electromechanical equipment, resulting in a high success rate. It not only improves the yield rate and assembly efficiency but also facilitates operation and maintenance by technicians.

[0004] This solution implements a packaging device for an automatic syringe injection pen, using a handle to push a pressing plate axially to assemble the two upper and lower pen barrels. However, during operation, the pressing direction is horizontal, and there is a lack of limiting during the pressing process, making it unsuitable for smaller caps and sheaths.

[0005] While other existing pressing devices are mostly automated, they are too large and complex in structure. They are generally used in conjunction with the feeding mechanism of the cap and sleeve. Large equipment is not suitable for the assembly of cone caps in the test batch. Therefore, there is an urgent need for a small auxiliary tool that can speed up the assembly efficiency and improve the assembly quality. Utility Model Content

[0006] To address the shortcomings in the aforementioned background technology, this utility model proposes a conical cap assembly tool for pre-filled and packaged syringes, which solves the problem of the lack of small conical cap assembly tools in the prior art.

[0007] The technical solution of this utility model is implemented as follows: A pre-filled syringe cone cap assembly tool includes a base and a pressure cap. The base has an insertion hole, and the insertion hole has a loading hole. The pressure cap has a plug-in post for inserting into the insertion hole. The loading hole is used to accommodate the cap, and the plug-in post is used to push the cap into the cap axially. A first limiting surface is provided between the loading hole and the insertion hole to limit the insertion position of the cap. The base has a second limiting surface that cooperates with the pressure cap to limit the insertion depth of the plug-in post, thus ensuring the accuracy and reliability during the assembly process.

[0008] Preferably, a guide structure is provided between the insertion hole and the insertion post, which guides the insertion of the insertion post. The guide structure ensures that the insertion post is smoothly inserted into the insertion hole in the correct direction.

[0009] Preferably, the guiding structure includes a guide groove formed on the inner wall of the insertion hole, and a guide strip provided on the outer wall of the insertion post that slides with the guide groove. The design of the guide groove and the guide strip enables the insertion post to have a clear guiding path during the insertion process, thereby improving the assembly accuracy.

[0010] Preferably, the guide groove and guide bar are both arranged in a straight line, and the straight guide groove and guide bar can restrict the insertion path to a straight line.

[0011] Preferably, both the guide groove and the guide strip are spirally arranged to provide a spiral guide path for the insertion of the insertion post, adapting to different assembly processes and operating habits.

[0012] Preferably, the insertion hole and the insertion post are threaded together. This threaded connection reduces the force required for insertion and also guides the insertion.

[0013] Preferably, the gap between the inner wall of the loading hole and the outer wall of the protective cap is greater than 0.2 mm. The front end face of the insertion post is provided with a positioning post for engaging with the inner hole of the sheath. The gap between the inner wall of the insertion hole and the outer wall of the insertion post is greater than 0.2 mm. An air hole penetrating the base is provided at the axis of the loading hole. This air hole maintains air pressure balance during sheath insertion. By setting the gap, both the installation position and air pressure balance can be maintained during insertion and removal.

[0014] The beneficial effects of this utility model are: This tool adopts a two-piece structure of base and pressure cap, which takes up less space, has a simple structure, and is more convenient to use; it reduces the problems that may occur during manual assembly, improves the stability and consistency of assembly, and helps to improve the accuracy of product testing results.

[0015] By setting a first limiting surface to limit the installation position of the cap, and setting a second limiting surface to fix the insertion end position of the plug, an effective limiting structure is provided. By limiting the insertion position of the cap and the insertion depth of the plug, the accuracy of the assembly operation is ensured, thereby enhancing the tightness between the cap and the syringe and avoiding deviations in the test results. Attached Figure Description

[0016] To more clearly illustrate the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic cross-sectional view of the present invention. Figure 2 This is a first schematic diagram of the guiding structure of this utility model; Figure 3 This is a second schematic diagram of the guiding structure of this utility model; Figure 4 This is a third schematic diagram of the guiding structure of this utility model; In the diagram: 1: base, 2: pressure cap, 3: insertion hole, 4: loading hole, 5: plug-in post, 6: protective cap, 7: protective sleeve, 8: first limiting surface, 9: second limiting surface, 10: guide groove, 11: guide strip, 12: positioning post, 13: air hole. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] like Figure 1 As shown in Embodiment 1, a tool for assembling a pre-filled syringe cone-shaped cap includes a base 1 and a pressure cap 2. The base 1 has an insertion hole 3, within which a loading hole 4 is provided. The pressure cap 2 has a plug-in post 5, which is used to insert and engage with the insertion hole 3. The loading hole 4 is used to accommodate the cap 6, and its size and shape are adapted to the cap 6, ensuring stable accommodation and providing a foundation for subsequent assembly operations. During assembly, the plug-in post 5 is used to push the sheath 7 into the cap 6 axially, achieving a tight fit between the sheath 7 and the cap 6, thus completing the assembly.

[0020] Furthermore, to ensure accurate positioning of the cap 6 within the loading hole 4, a first limiting surface 8 is provided between the loading hole 4 and the insertion hole 3. The first limiting surface 8 limits the insertion position of the cap 6. When the cap 6 is inserted into the loading hole 4 and pushed towards the insertion hole 3, the first limiting surface 8 precisely limits the insertion position of the cap 6, preventing over-insertion or under-insertion, thus ensuring a good seal between the cap 6 and the syringe body. The base 1 is provided with a second limiting surface 9 that mates with the cap 2. During the downward pressing of the cap 2, the second limiting surface 9 limits the insertion depth of the insertion post 5, preventing excessive pushing of the insertion post 5 that could damage the sheath 7 or cause over-assembly, further improving the accuracy and reliability of the assembly.

[0021] In practical use, the cap 6 is first placed into the insertion hole, allowing it to fit into the loading hole and engage with the first limiting surface, which defines its axial position. Then, the sleeve 7 is placed into the insertion hole, and the plug-in post is inserted into the insertion hole. The sleeve is pushed axially until it is fully inserted, allowing the sleeve to enter the cap. The second limiting surface limits the insertion depth of the base and the plug-in post. In this embodiment, the pressure cap can be rotated during the insertion of the plug-in post to make the post rotate, thus facilitating smoother insertion. Furthermore, the cap's end face thickness is small, and the sleeve is made of flexible rubber, allowing for better insertion into the cap's inner hole during initial insertion.

[0022] This tool adopts a two-piece structure of base and pressure cap, which takes up less space, has a simple structure, and is more convenient to use; it reduces the problems that may occur during manual assembly, improves the stability and consistency of assembly, and helps to improve the accuracy of product testing results.

[0023] Example 2: A cone-shaped cap assembly tool for a pre-filled syringe. Based on Example 1, a guide structure is provided between the insertion hole 3 and the insertion post 5. The guide structure can guide the insertion of the insertion post 5.

[0024] Specifically, in this embodiment, the guiding structure includes a guide groove 10 formed on the inner wall of the insertion hole 3, and a guide strip 11 provided on the outer wall of the insertion post 5 that slides in cooperation with the guide groove 10. The design of the guide groove 10 and the guide strip 11 ensures that the insertion post 5 has a clear guiding path when inserted into the insertion hole 3, and can be inserted smoothly in the correct direction, avoiding skewing or jamming during the insertion process, and improving the efficiency and quality of assembly.

[0025] As the first option, such as Figure 2 As shown, in this embodiment, both the guide groove 10 and the guide bar 11 are arranged in a straight line. The straight guide structure is suitable for general assembly needs, can provide stable straight guidance, ensure the coaxiality of the plug post 5 and the insertion hole 3, and improve the assembly accuracy.

[0026] As a second option, such as Figure 3 As shown, both the guide groove 10 and the guide bar 11 are spirally arranged. The spiral guide structure provides a helical guide path for the insertion of the insertion post 5, adapting to different assembly processes and operating habits. During insertion, the insertion post 5 rotates and advances along the spiral guide groove 10, which helps to better guide the insertion post 5 into the insertion hole 3, and also increases the stability of insertion.

[0027] As a third option, such as Figure 4 As shown, the insertion hole 3 and the insertion post 5 are connected by a thread. This threaded connection reduces the force required for insertion and also guides the insertion, allowing the insertion post 5 to be screwed into the insertion hole 3 more smoothly, thus improving the ease and reliability of assembly.

[0028] In Example 3, based on Example 2, the gap between the inner wall of the loading hole 4 and the outer wall of the protective cap 6 is greater than 0.2mm. This prevents the protective cap 6 from shaking in the loading hole 4 and makes it easier for the protective cap 6 to be inserted or removed, facilitating the assembly operation and ensuring the stability of the protective cap 6 during the assembly process.

[0029] In addition, the front end face of the insertion post 5 is provided with a positioning post 12 for engaging with the inner hole of the sheath 7. The design of the positioning post 12 allows the positioning post to be inserted into the inner hole of the sheath before insertion, thereby positioning the sheath. As the insertion post is inserted, the sheath can always move at the axial position, thus allowing the sheath to be better inserted into the cap, improving the coaxiality and accuracy of the assembly, and preventing the sheath 7 from shifting or tilting when inserted into the cap 6, ensuring the assembly quality.

[0030] As a further specific embodiment, the gap between the inner wall of the insertion hole 3 and the outer wall of the insertion post 5 is greater than 0.2 mm. This gap helps maintain air pressure balance before and after insertion, while also improving insertion smoothness and assembly efficiency. An air hole 13 penetrating the base 1 is provided at the axis of the loading hole 4. The air hole helps to expel air from the loading hole 4 during assembly, preventing problems such as difficulty in inserting the cap 6 or pushing the sleeve 7 due to air pressure. Simultaneously, after assembly, the air hole also facilitates air intake, making it convenient to remove the cap.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tool for assembling a conical cap for a pre-filled syringe, characterized in that: The device includes a base (1) and a pressure cap (2). The base (1) has an insertion hole (3) and a loading hole (4) inside the insertion hole (3). The pressure cap (2) has a plug-in post (5) for plugging into the insertion hole (3). The loading hole (4) is used to accommodate the protective cap (6). The plug-in post (5) is used to push the protective sleeve (7) into the protective cap (6) along the axial direction. A first limiting surface (8) is provided between the loading hole (4) and the insertion hole (3) for limiting the insertion position of the protective cap (6). The base (1) has a second limiting surface (9) that cooperates with the pressure cap (2) for limiting the insertion depth of the plug-in post (5).

2. The conical cap assembly tool for pre-filled and packaged syringes according to claim 1, characterized in that: A guide structure is provided between the insertion hole (3) and the insertion post (5), which can guide the insertion of the insertion post (5).

3. The conical cap assembly tool for pre-filled and packaged syringes according to claim 2, characterized in that: The guiding structure includes a guide groove (10) opened on the inner wall of the insertion hole (3), and a guide strip (11) that slides with the guide groove (10) on the outer wall of the insertion post (5).

4. The conical cap assembly tool for pre-filled and packaged syringes according to claim 3, characterized in that: The guide groove (10) and guide bar (11) are both arranged in a straight line.

5. The conical cap assembly tool for pre-filled and packaged syringes according to claim 3, characterized in that: Both the guide groove (10) and the guide bar (11) are spiral-shaped.

6. The conical cap assembly tool for pre-filled and packaged syringes according to claim 2, characterized in that: The insertion hole (3) and the insertion post (5) are threaded together.

7. The conical cap assembly tool for pre-filled and packaged syringes according to any one of claims 1 to 6, characterized in that: The gap between the inner wall of the loading hole (4) and the outer wall of the cap (6) is greater than 0.2 mm.

8. The conical cap assembly tool for pre-filled and packaged syringes according to claim 7, characterized in that: The front end face of the plug (5) is provided with a positioning post (12) for engaging with the inner hole of the sheath (7).

9. The conical cap assembly tool for pre-filled and packaged syringes according to claim 8, characterized in that: The gap between the inner wall of the insertion hole (3) and the outer wall of the insertion post (5) is greater than 0.2 mm.

10. The conical cap assembly tool for pre-filled and packaged syringes according to claim 9, characterized in that: The loading hole (4) is provided with an air hole (13) that passes through the base (1) at the axis of the loading hole (4).

Images