A needle penetration force testing device

Abstract

The utility model relates to injection needle puncture force test technical field, specifically is a kind of injection needle puncture force testing device, including texture meter platform;C-shaped mounting table, C-shaped mounting table is located in the upper end of texture meter platform;Translation sliding table, translation sliding table is located between two C-shaped mounting tables;C-shaped base, C-shaped base is slidably connected in the circumferential surface of translation sliding table;Fixed table, fixed table fixedly connected in the upper end of C-shaped base;Simulation skin template, simulation skin template is located in the upper end of fixed table;Through the structure design of high integration and modularization, the standardization and precision of puncture force test process are realized, the device integrates C-shaped mounting table, adjustable translation sliding table, special fixture and power sensing element organically on texture meter platform, this structure ensures that injection needle puncture equipment and simulation skin template always maintain accurate vertical centering and stable relative motion, fundamentally eliminates the test error caused by clamping eccentricity or angle inclination.

Description

Technical Field

[0001] This utility model relates to the field of injection needle puncture force testing technology, and in particular to an injection needle puncture force testing device. Background Technology

[0002] Injection needles are common medical devices in the pharmaceutical industry. Pharmacopoes specify clear requirements for the force required for injection needles to penetrate the skin. This device, as an auxiliary component for texture analyzer testing of injection needle puncture force, is applicable to the puncture force testing of various pre-filled syringes, making full use of the effective size of simulated skin and significantly reducing usage costs.

[0003] Different injection needle products vary in size and structure. Existing clamps are often customized for specific models, requiring frequent clamp changes or adjustments when changing test samples. This is cumbersome and makes it difficult to guarantee concentricity and perpendicularity during each clamping, affecting the repeatability and accuracy of test results. During testing, the simulated membrane is usually simply laid flat or fixed on a platform, and each puncture can only form a puncture point on the membrane. After each test, either the membrane must be replaced or manually moved to find a new test area. This method is not only inefficient and costly, but manual movement also makes it difficult to guarantee positional accuracy, potentially leading to inconsistent test conditions. Therefore, an injection needle puncture force testing device is proposed to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide an injection needle puncture force testing device to solve the aforementioned problems, improving the performance of injection needles with varying dimensions and structures. Existing clamps are often custom-made for specific models, requiring frequent clamp changes or adjustments when changing test samples. This is cumbersome and makes it difficult to guarantee concentricity and perpendicularity during each clamping, affecting the repeatability and accuracy of test results. During testing, the simulated membrane is typically simply laid flat or fixed on a platform, and each puncture only creates one puncture point on the membrane. After each test, either the membrane must be replaced or manually moved to find a new test area. This method is not only inefficient and costly, but manual movement also makes it difficult to ensure positional accuracy, potentially leading to inconsistent test conditions.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: an injection needle puncture force testing device, comprising: Texture analyzer platform; A C-shaped mounting platform, located at the upper end of the texture analyzer platform; A translation slide, wherein the translation slide is located between two C-shaped mounting platforms; A C-shaped base, which is slidably connected to the circumferential surface of the translation slide; A fixed platform, which is fixedly connected to the upper end of the C-shaped base; A simulated leather template, wherein the simulated leather template is located at the upper end of the fixed platform; A force sensor is located at the upper end of the texture analyzer platform; A fixing frame is located at the lower end of the force sensor, and the force sensor is fixed to the fixing frame by an adjusting column; Two sliding columns A, both of which are fixedly connected to the inner wall of the fixed frame; Two clamps, both of which are slidably connected to the surfaces of two sliding pillars A; Adjusting bolt B, which is located on one side of the fixed frame, is threaded into the clamp; An injection needle puncture device is located between two clamps and at the upper end of a simulated skin template.

[0006] Preferably, the upper end of the texture analyzer platform is provided with a sliding groove A, the surface of the C-shaped mounting platform is provided with a sliding groove C, and the upper end of the C-shaped mounting platform is provided with an adjusting bolt A, which is threadedly connected to the sliding groove A and the sliding groove C.

[0007] Preferably, a groove B is provided on one side of the C-shaped mounting platform, a sliding column B is fixedly connected to one side of the translation slide, the sliding column B is slidably connected in the groove B, and a positioning pin C is threadedly connected to the C-shaped mounting platform and threaded through the translation slide.

[0008] Preferably, the translation slide is provided with multiple pin holes, and the C-shaped base is provided with a positioning pin A, which is inserted into the pin holes.

[0009] Preferably, the fixed platform is provided with a positioning pin B, which passes through the simulated leather template and is threaded into the fixed platform.

[0010] Preferably, the simulated skin template has multiple rows of puncture holes, with each row containing multiple holes.

[0011] Preferably, the clamping force is adjusted by the adjusting bolt B, making it suitable for injection needle puncture devices of different specifications.

[0012] The beneficial effects of this utility model are: Through a highly integrated and modular structural design, the standardization and precision of the puncture force testing process are achieved. The device organically integrates the C-shaped mounting platform, adjustable translation slide, special clamps and force sensors on the texture analyzer platform, creating a fully functional dedicated testing workstation. This structure ensures that the injection needle puncture device and the simulated skin template always maintain precise vertical alignment and stable relative movement, fundamentally eliminating testing errors caused by clamping eccentricity or angular tilt.

[0013] The multiple rows of puncture holes on the simulated skin template, combined with the precise positioning function of the translation slide, enable multiple and efficient uses of a single skin template, reducing the cost of testing consumables. The quick adjustment and locking mechanism of the fixture simplifies the operation process of changing test samples and effectively shortens the preparation time. This not only meets the laboratory's stringent requirements for data accuracy but also enables it to adapt to the fast quality inspection rhythm on the production line, providing a stable, reliable, and efficient testing platform for the quality control and design iteration of injection needle products. Attached Figure Description

[0014] Figure 1 This is a front perspective view of the present invention; Figure 2 For the present utility model Figure 1 A magnified view of a section at point A in the middle; Figure 3 For the present utility model Figure 1 A magnified view of a section at point B in the middle.

[0015] In the diagram: 1. Texture analyzer platform; 2. Slide A; 3. C-shaped mounting platform; 4. Adjusting bolt A; 5. Translation slide; 6. C-shaped base; 7. Positioning pin A; 8. Fixing platform; 9. Positioning pin B; 10. Simulated leather template; 11. Force sensor; 12. Adjusting bolt B; 13. Injection needle puncture device; 14. Fixture; 15. Slide column A; 16. Clamp; 17. Slide B; 18. Slide column B; 19. Positioning pin C; 20. Slide C. Detailed Implementation

[0016] 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.

[0017] Example 1

[0018] Please see Figures 1-3 The present invention provides the following technical solution: A device for testing the puncture force of an injection needle, comprising: Texture analyzer platform 1; C-shaped mounting platform 3, located at the upper end of the texture analyzer platform 1; The translation slide 5 is located between the two C-shaped mounting platforms 3; C-shaped base 6, which is slidably connected to the circumferential surface of translation slide 5; Fixed platform 8 is fixedly connected to the upper end of C-shaped base 6; Simulated leather template 10, which is located at the upper end of the fixed platform 8; Force sensor 11 is located at the upper end of the texture instrument platform 1; The fixing frame 14 is located at the lower end of the force sensor 11, and the force sensor 11 and the fixing frame 14 are fixed by an adjusting column; Two sliding columns A15 are fixedly connected to the inner wall of the fixing frame 14; Two clamps 16 are slidably connected to the surfaces of two sliding pillars A15; Adjusting bolt B12 is located on one side of the fixed frame 14 and is threaded into the clamp 16. The injection needle puncture device 13 is located between two clamps 16 and at the upper end of the simulated skin template 10.

[0019] In a specific embodiment of this utility model, when a needle puncture force test is required, the simulated skin template 10 is first installed on the upper end of the fixed platform 8, and the horizontal position of the C-shaped base 6 and the fixed platform 8 is adjusted by the translation slide 5 so that the simulated skin template 10 is aligned with the needle puncture device 13 above. Then, the needle puncture device 13 is placed between two clamps 16, and the clamps 16 are slid along the slide column A15 to clamp the needle puncture device 13. The clamps 16 are then locked by the adjusting bolt B12 to fix the needle puncture device 13. Next, the relative height between the fixed frame 14 and the force sensor 11 is adjusted by the adjusting column so that the needle tip of the needle puncture device 13 is close to the surface of the simulated skin template 10. After the texture analyzer platform 1 is started, the needle puncture device 13 moves vertically downward under the drive to puncture the simulated skin template 10. At this time, the force sensor 11 detects and records the force value change in real time during the puncture process. The C-shaped mounting platform 3 provides stable support for the overall structure, ensuring that all components remain aligned and stable during the test.

[0020] Please refer to the details. Figures 1-3The upper end of the texture analyzer platform 1 is provided with a slide groove A2, the surface of the C-shaped mounting platform 3 is provided with a slide groove C20, and the upper end of the C-shaped mounting platform 3 is provided with an adjusting bolt A4, which is threadedly connected to the slide groove A2 and the slide groove C20.

[0021] In this embodiment: when it is necessary to adjust the lateral position of the C-shaped mounting platform 3 on the texture analyzer platform 1, the adjusting bolt A4 can be loosened first to disconnect it from the threaded connection of the slide groove A2 and slide groove C20; then, after sliding the C-shaped mounting platform 3 along the slide groove A2 to the desired position, the adjusting bolt A4 can be tightened again to securely fix the C-shaped mounting platform 3 on the texture analyzer platform 1 through the threaded connection.

[0022] Please refer to the details. Figures 1-3 A sliding groove B17 is provided on one side of the C-shaped mounting platform 3. A sliding column B18 is fixedly connected to one side of the translation slide 5. The sliding column B18 is slidably connected in the sliding groove B17. A positioning pin C19 is threadedly connected to the C-shaped mounting platform 3 and threaded through the translation slide 5.

[0023] In this embodiment: when it is necessary to adjust the installation angle of the translation slide 5, the positioning pin C19 can be loosened first, so that the translation slide 5 can slide left and right along the sliding groove B17 on the side of the C-shaped mounting platform 3 through the sliding column B18 on one side; after the sliding column B18 moves to the predetermined position, the positioning pin C19 is tightened again so that its threaded connection passes through the translation slide 5, and the translation slide 5 can be firmly fixed on the C-shaped mounting platform 3.

[0024] Please refer to the details. Figures 1-3 The translation slide 5 is provided with multiple pin holes, and the C-shaped base 6 is provided with a positioning pin A7, which is inserted into the pin hole.

[0025] In this embodiment: when it is necessary to adjust the horizontal position of the C-shaped base 6 on the translation slide 5, the positioning pin A7 can be pulled out from the pin hole on the current translation slide 5; then slide the C-shaped base 6 along the translation slide 5 to the target position, so that the positioning pin A7 is aligned with the pin hole at that position and inserted, thereby realizing the positioning and fixing of the C-shaped base 6.

[0026] Please refer to the details. Figures 1-3 The fixed platform 8 is equipped with a positioning pin B9, which passes through the simulated leather template 10 and is threaded into the fixed platform 8.

[0027] In this embodiment: when it is necessary to install or replace the simulated leather template 10, the simulated leather template 10 can be placed on the upper end of the fixed platform 8, so that the positioning hole on it is aligned with the positioning pin B9 on the fixed platform 8; then the positioning pin B9 is inserted through the simulated leather template 10 and threaded into the fixed platform 8, so as to complete the accurate positioning and fixing of the simulated leather template 10.

[0028] Please refer to the details. Figures 1-3 The simulated skin template 10 has multiple rows of puncture holes, with each row containing multiple holes.

[0029] In this embodiment: when performing multiple puncture tests or tests at different locations, multiple rows of puncture holes can be used on the simulated skin template 10, with each row containing multiple holes; after a test is completed, the horizontal position of the fixed platform 8 can be adjusted by the translation slide 5 so that the injection needle puncture device 13 is aligned with the new unpunctured hole on the simulated skin template 10, and subsequent tests can be quickly performed on the same simulated skin template 10.

[0030] Please refer to the details. Figures 1-3 The clamp 16 adjusts the clamping force by adjusting the bolt B12, and is suitable for injection needle puncture devices 13 of different specifications.

[0031] In this embodiment: when installing injection needle puncture devices 13 of different specifications, the adjusting bolt B12 can be loosened first, so that the two clamps 16 can slide towards or away from each other along the two sliding columns A15 to adjust the distance between the two clamps 16; after placing the injection needle puncture device 13 between the two clamps 16, the adjusting bolt B12 can be tightened to adjust the clamping force, thereby firmly clamping the injection needle puncture devices 13 of different specifications.

[0032] All standard parts used in this invention can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The control method is automatic control through the control unit. The control circuit of the control unit can be implemented by simple programming by those skilled in the art, which is common knowledge in the field. Therefore, the control method and circuit connection will not be explained in detail in this invention.

[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for testing the puncture force of an injection needle, characterized in that, include: Texture analyzer platform (1); C-shaped mounting platform (3), the C-shaped mounting platform (3) is located at the upper end of the texture analyzer platform (1); Translation slide (5), which is located between two C-shaped mounting platforms (3); C-shaped base (6), which is slidably connected to the circumferential surface of translation slide (5); A fixed platform (8) is fixedly connected to the upper end of a C-shaped base (6); Simulated leather template (10), the simulated leather template (10) is located at the upper end of the fixed platform (8); Force sensor (11), the force sensor (11) is located at the upper end of the texture analyzer platform (1); A fixing frame (14) is located at the lower end of the force sensor (11), and the force sensor (11) and the fixing frame (14) are fixed by an adjusting column; Two sliding columns A (15) are fixedly connected to the inner wall of the fixing frame (14); Two clamps (16), both of which are slidably connected to the surfaces of two sliding columns A (15); Adjusting bolt B (12), the adjusting bolt B (12) is located on one side of the fixing frame (14), and the adjusting bolt B (12) is threaded into the clamp (16); The injection needle puncture device (13) is located between two clamps (16) and at the upper end of the simulated skin template (10).

2. The injection needle puncture force testing device according to claim 1, characterized in that: The upper end of the texture instrument platform (1) is provided with a groove A (2), the surface of the C-shaped mounting platform (3) is provided with a groove C (20), the upper end of the C-shaped mounting platform (3) is provided with an adjusting bolt A (4), and the adjusting bolt A (4) is threadedly connected to the groove A (2) and the groove C (20).

3. The injection needle puncture force testing device according to claim 2, characterized in that: The C-shaped mounting platform (3) has a sliding groove B (17) on one side end, and a sliding column B (18) is fixedly connected to one side end of the translation slide (5). The sliding column B (18) is slidably connected in the sliding groove B (17). The C-shaped mounting platform (3) is threadedly connected to a positioning pin C (19) which is threaded through the translation slide (5).

4. The injection needle puncture force testing device according to claim 3, characterized in that: The translation slide (5) is provided with multiple pin holes, and the C-shaped base (6) is provided with positioning pin A (7), which is inserted into the pin hole.

5. The injection needle puncture force testing device according to claim 4, characterized in that: The fixed platform (8) is provided with a positioning pin B (9), which penetrates the simulated leather template (10) and is threaded into the fixed platform (8).

6. The injection needle puncture force testing device according to claim 5, characterized in that: The simulated skin template (10) has multiple rows of puncture holes, each row containing multiple holes.

7. The injection needle puncture force testing device according to claim 6, characterized in that: The clamp (16) adjusts the clamping force through the adjusting bolt B (12), and is suitable for injection needle puncture devices (13) of different specifications.

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