Tool for testing pull-out force of upper and lower pen shells

Abstract

The utility model relates to the technical field of injection pens, in particular to an upper and lower pen shell pullout force test fixture, which comprises a clamping and fixing part, the clamping and fixing part comprises a bottom plate, a clamping part and a connecting part, the clamping part is positioned on the bottom plate, the connecting part covers the clamping part and is connected with a universal test machine, and the universal test machine is connected with the universal test machine. The clamping part comprises a first sliding groove, a pair of clamping blocks and a pair of sliding rods for pulling the pair of clamping blocks to slide in the first sliding groove, round holes are formed in the clamping blocks, springs are installed in the round holes, one ends of the springs are fixed to the clamping blocks, the other ends of the springs are connected to the clamping part, and the clamping blocks return to the initial position; the upper component is placed on the clamping part and is fixedly clamped through the clamping part; and the supporting and limiting part is located below the clamping and fixing part, and a second cavity is formed in the supporting and limiting part and used for containing the lower assembly and fixing or limiting the lower assembly in the second cavity, so that the upper assembly and the lower assembly are conveniently separated.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection pen technical field, especially a kind of upper and lower pen shell pull-out force test fixture. BACKGROUND

[0002] Insulin pen, as a kind of convenient and efficient insulin injection device designed for diabetic patients, has been widely integrated into their daily treatment. Its ingenious design combines reusable pen shell and replaceable cartridge, so that users can easily install or remove the cartridge through simple plug-in action, and then complete the injection of insulin. However, the plug-in force between the upper and lower pen shells of the insulin pen, which seems to be a small detail, actually plays a crucial role in its overall use experience and durability.

[0003] In actual operation, the plug-in force of the insulin pen must be maintained within an appropriate range. This requirement aims to ensure that users can easily and stably complete the cartridge replacement process, while effectively avoiding a series of problems such as cartridge loosening, pen shell damage or insulin leakage caused by excessive or insufficient plug-in force. Therefore, accurate and comprehensive testing of the pull-out force of the upper and lower pen shells of the insulin pen to evaluate the stability of its plug-in performance is undoubtedly an indispensable key step in the production and quality control process of the insulin pen.

[0004] When testing the pull-out force of the upper and lower pen shells of the insulin pen, how to ensure the clamping and fixing of the upper and lower pen shells becomes the key to the success of the test. The existing test technology on the market often has deficiencies in clamping force, or cannot provide stable clamping effect for different sizes and models of insulin pens. This not only may affect the accuracy of the test, but also may cause safety hazards during the test process due to unstable clamping. Therefore, it is particularly important to design a test fixture that can provide stable clamping force for different insulin pens while ensuring that the pen shell will not be damaged due to uneven stress during the test process.

[0005] Therefore, the present application develops a kind of upper and lower pen shell pull-out force test fixture to solve the problems existing in the prior art. UTILITY MODEL CONTENTS

[0006] The utility model aims at: provide a kind of upper and lower pen shell pull-out force test fixture, to solve the problems of insufficient clamping force of test fixture and unable to adapt to different models of insulin pen when the upper and lower pen shells of insulin pen are tested in prior art.

[0007] The technical scheme of the utility model is: a kind of upper and lower pen shell pull-out force test fixture, comprising:

[0008] The clamping fixing part comprises a bottom plate, a clamping part and a connecting part, the clamping part is located on the bottom plate, the connecting part is arranged on the clamping part and is connected with the universal testing machine, the clamping part comprises a first sliding groove, a pair of clamping blocks and a pair of sliding rods for sliding the pair of clamping blocks in the first sliding groove, a circular hole is arranged in the clamping block, a spring is arranged in the circular hole, one end of the spring is fixed on the clamping block, and the other end of the spring is connected to the clamping part, so that the clamping block is returned to the initial position under the elastic force of the spring, the clamping fixing part is provided with a first cavity for placing an upper assembly, and the upper assembly is clamped and fixed by the clamping part.

[0009] The supporting limiting part is located below the clamping fixing part, the supporting limiting part is provided with a second cavity for placing a lower assembly, and the lower assembly is fixed or limited in the second cavity, so that the upper assembly and the lower assembly can be separated.

[0010] Preferably, a bearing is arranged at one end of the clamping part close to the sliding rod, the side surface of the bearing protrudes towards the sliding rod and is matched with the side surface of the sliding rod.

[0011] Preferably, limit rods are arranged at two ends of the pair of sliding rods respectively, so as to prevent the sliding rods from falling off.

[0012] Preferably, the supporting limiting part comprises a plurality of supporting parts and a cover plate, the supporting parts are arranged in sequence, the cover plate is fixed on the uppermost supporting part, the uppermost supporting part is provided with a second sliding groove, a pair of clamping blocks and a sliding plate for sliding the pair of clamping blocks are arranged in the second sliding groove, the sliding plate is provided with a sliding rail inclined relative to the movement direction of the sliding plate, and the clamping block is provided with a guide rod matched with the sliding rail.

[0013] Preferably, the supporting limiting part comprises a supporting seat and a limiting block, the limiting block is in U-shaped structure, the inner space of the limiting block is a second cavity, and the top of the limiting block extends to the second cavity.

[0014] Preferably, the top of the supporting seat is provided with a third sliding groove, and a sliding block is arranged in the third sliding groove and fixed on the limiting block, so that the limiting block slides in the third sliding groove.

[0015] Compared with the prior art, the clamping fixing part has the following advantages:

[0016] (1) The support limiting part is designed flexibly, can be adjusted according to different test requirements, the clamping and fixing part is designed through the inclined surface of the slide rod and the clamping block, efficient clamping and releasing functions are realized, when the slide rod moves, the inclined surface pushes the clamping block to gradually close, so that the upper assembly is clamped, at the same time, the setting of the spring ensures that the clamping block can automatically move away from the upper assembly when not subjected to external force, the upper assembly is convenient to replace;

[0017] (2) The clamping part is fixed with a bearing at one end close to the slide rod, sliding friction is changed into rolling friction, friction resistance is reduced, sliding efficiency is improved, and the rolling movement of the bearing can also maintain high movement accuracy, so that the clamping block can be accurately positioned when clamping the upper assembly, the clamping stability is improved while the clamping force is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model will be described further in combination with the drawings and embodiments:

[0019] Figure 1 It is the structure schematic view of the utility model discloses a upper and lower pen shell pulls out force test fixture;

[0020] Figure 2 It is the partial section view of the utility model discloses the clamping part;

[0021] Figure 3 It is the plan view of the utility model discloses the clamping and fixing part;

[0022] Figure 4 It is the structure schematic view of the utility model discloses the support limiting part;

[0023] Figure 5 It is the structure schematic view of the utility model embodiment two;

[0024] Figure 6 It is the structure schematic view of the utility model embodiment three;

[0025] Figure 7 It is the side view of the utility model embodiment three.

[0026] Wherein: 1, clamping and fixing part;11, bottom plate;12, clamping part;121, first sliding groove;122, clamping block;123, slide rod;124, round hole;125, spring;126, limiting rod;13, connecting part;14, first chamber;15, bearing;2, support limiting part;21, second chamber;22, support part;221, second sliding groove;222, embrace and clamp block;223, slide plate;224, slide rail;225, guide rod;23, cover plate;24, support seat;241, third sliding groove;242, sliding block;25, limiting block;3, upper assembly;4, lower assembly. DETAILED DESCRIPTION

[0027] The utility model discloses a further detailed description of the contents of the utility model is made below in conjunction with specific embodiments:

[0028] As Figures 1-4 The utility model discloses a pen shell pull -out force test fixture, including clamping fixed part 1 and support limiting part 2, clamping fixed part 1 includes bottom plate 11, clamping part 12 and connecting part 13, support part is installed on bottom plate 11, and connecting part 13 is fixed at the top of support part, and connecting part 13 is connected with universal testing machine, wherein, clamping fixed part 1 is equipped with first chamber 14, and support limiting part 2 is located below clamping fixed part 1, and second chamber 21 is equipped in support limiting part 2, and first chamber 14 places upper assembly 3 and is clamped through clamping part 12, and second chamber 21 places lower assembly 4, when starting universal testing machine, make upper assembly 3 and lower assembly 4 separate, to measure the pull -out force of upper assembly 3 and lower assembly 4.

[0029] Wherein, clamping part 12 includes first sliding slot 121, a pair of clamping blocks 122 and a pair of sliding rods 123, a pair of clamping blocks 122 are located at the two sides of first chamber 14 and in first sliding slot 121, and a pair of sliding rods 123 are located at the two sides of a pair of clamping blocks 122, and the side close to clamping block 122 of sliding rod 123 is at least partially arranged to form an inclined plane with the moving direction of sliding rod 123, when sliding rod 123 moves, the inclined plane contacts clamping block 122, and a pair of clamping blocks 122 are gradually close to each other to clamp upper assembly 3, simultaneously, clamping block 122 is equipped with round hole 124, spring 125 is equipped in round hole 124, and the two ends of spring 125 are fixed in round hole 124 and clamping fixed part 1 respectively, when upper assembly 3 is clamped, spring 125 is in compression state, when sliding rod 123 is pulled, sliding rod 123 gradually moves away from upper assembly 3, spring 125 does not push a pair of clamping blocks 122 away from upper assembly 3 under pressure, to replace upper assembly 3.

[0030] Further, as Figures 2-3 The end close to sliding rod 123 of clamping part 12 is fixed with bearing 15, and the side of bearing 15 protrudes to the direction of sliding rod 123, when sliding rod 123 slides, bearing 15 rolls and can push a pair of clamping blocks 122 to clamp upper assembly 3, the design of bearing 15 makes the original sliding friction between sliding rod 123 and clamping part 12 change into rolling friction, thereby reducing friction resistance and improving sliding efficiency, the rolling movement of bearing 15 can keep higher movement accuracy, ensure that clamping block 122 can be accurately aligned when clamping upper assembly 3, and improve the stability and reliability of clamping.

[0031] To facilitate the clamping and pushing / pulling of the upper component 3, limiting rods 126 are provided at both ends of the two slide rods 123. The two slide rods 123 are connected together, and the upper component 3 can be clamped by pushing and pulling the limiting rods 126. The two limiting rods 126 can also prevent the slide rods 123 from moving too far or falling off the clamping and fixing part.

[0032] Example 1: The support limiting part 2 includes multiple support parts 22 and a cover plate 23, with the support parts 22 stacked sequentially. The cover plate 23 is fixed on the uppermost support part 22. The uppermost support part 22 is provided with a second slide groove 221. A pair of clamping blocks 222 and a sliding plate 223 that pulls the pair of clamping blocks 222 are slidably disposed in the second slide groove 221. The sliding plate 223 is provided with a slide rail 224 that is inclined relative to the direction of movement of the sliding plate 223. The clamping blocks 222 are provided with guide rods 225 that match the slide rail 224. When the sliding plate 223 is subjected to force, the sliding plate 223 begins to move along the direction of the second slide groove 221. As the sliding plate 223 moves, the slide rail 224 on the sliding plate 223 and the guide rod 225 on the clamping blocks 222... When the guide rod 225 moves relative to the slide rail 224, the guide rod 225 will be subjected to an inclined force when sliding within the slide rail 224. This inclined force will cause the clamping blocks 222 to move relative to each other along the direction of the slide groove. Under the guidance of the slide rail 224, a pair of clamping blocks 222 will move to both ends of the slide groove respectively. When the slide plate 223 moves to a certain position, the clamping blocks 222 will reach the predetermined clamping or releasing position. At this time, the upper component 3 is the upper pen shell component, the lower component is the lower pen shell component and the pen cap, the clamping part 12 clamps the side wall of the upper pen shell component, and the clamping blocks 222 clamp the side wall of the lower pen shell component. After the universal testing machine is started, the pull-out force between the upper pen shell component and the lower pen shell component can be tested.

[0033] Example 2: Figure 5 As shown, the upper component 3 is the upper pen shell assembly and the lower pen shell assembly, and the lower component 4 is the pen cap. The pen cap is moved between a pair of clamping blocks 222. By moving the slide plate 223, the pair of clamping blocks 222 clamp the pen cap on the side wall, while the pair of clamping blocks 122 clamp the lower pen shell assembly. After the universal testing machine is started, the pull-out force between the lower pen shell assembly and the pen cap can be tested.

[0034] Example 3: Figure 6As shown, the support limiting part 2 comprises a support seat 24 and a limiting block 25, wherein the limiting block 25 is in a U-shaped structure, and the inner space of the U-shaped structure is the second chamber 21 for placing the lower assembly 4, the upper assembly 3 is an upper pen shell assembly and a lower pen shell assembly, the lower assembly 4 is a pen cap, the pen cap is placed in the second chamber 21, and the top of the limiting block 25 extends to the second chamber 21, the extended part blocks the side wall of the pen cap, when the pull-out force test is performed, the clamping block 122 clamps the whole formed by the upper pen shell assembly and the lower pen shell assembly, and the pen cap is blocked and cannot leave the second chamber 21, so that the pen cap can be separated from the lower pen shell assembly, and the pull-out force test of the lower pen shell assembly and the pen cap is realized.

[0035] Further, the top of the support seat 24 is provided with a third sliding groove 241, and a sliding block 242 is slidably arranged in the third sliding groove 241, the sliding block 242 is fixed on the limiting block 25, so that the limiting block 25 slides in the third sliding groove 241, and the sliding connection of the sliding block 242 in the third sliding groove 241 realizes the flexible movement of the limiting block 25 relative to the support seat 24, and the relative movement of the limiting block 25 can be realized through the sliding of the sliding block 242, so that the position can be adjusted to better test the pull-out force.

[0036] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and it cannot limit the protection scope of the present application. For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or basic characteristics of the present application, therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

Claims

1. A pen shell pull-out force test fixture, characterized by, The utility model relates to a clamping fixing part (1) and support limiting part (2) for universal testing machine, and the clamping fixing part (1) includes bottom plate (11), clamping part (12) and connecting part (13), the clamping part (12) is located on the bottom plate (11), the connecting part (13) covers the clamping part (12) and is connected with universal testing machine, the clamping part (12) includes first sliding slot (121), a pair of clamping blocks (122) and a pair of slide rods (123) that pull a pair of the clamping blocks (122) and slide in the first sliding slot (121), the clamping block (122) is equipped with round hole (124) inside, the spring (125) is installed in the round hole (124), one end of the spring (125) is fixed on the clamping block (122), the other end is connected on the clamping part (12), makes the clamping block (122) be returned to initial position by the spring (125) rebound force, the clamping fixing part (1) is equipped with first chamber (14), is used for placing upper assembly (3), and the upper assembly (3) is fixed clamped through the clamping part (12). Support limiting part (2) is located below the clamping fixing part (1), and the support limiting part (2) is provided with a second chamber (21) for placing a lower assembly (4), and the lower assembly (4) is fixed or limited in the second chamber (21), so that the upper assembly (3) and the lower assembly (4) are separated. The clamping part (12) is provided with a bearing (15) at one end close to the slide rod (123), the side surface of the bearing (15) protrudes towards the slide rod (123), and the side surface of the bearing (15) is in close contact with the side surface of the slide rod (123).

2. The upper and lower pen shell pulling force test fixture according to claim 1, wherein: The two ends of the slide rod (123) are respectively provided with a limiting rod (126) to prevent the slide rod (123) from falling off.

3. The upper and lower pen shell pulling force test fixture according to claim 1, wherein: The support limiting part (2) includes a plurality of support parts (22) and a cover plate (23), the support parts (22) are sequentially stacked, the cover plate (23) is fixed on the uppermost support part (22), the uppermost support part (22) is provided with a second sliding slot (221), a pair of clamping blocks (222) and a sliding plate (223) for pulling the pair of clamping blocks (222) to move are slidably arranged in the second sliding slot (221), the sliding plate (223) is provided with a sliding rail (224) inclined to the movement direction of the sliding plate (223), and the clamping block (222) is provided with a guide rod (225) matched with the sliding rail (224).

4. The upper and lower pen shell pulling force test fixture according to claim 1, characterized in that: The support limiting part (2) includes a support seat (24) and a limiting block (25), the limiting block (25) is in U-shaped structure, and the internal space is the second chamber (21), and the top of the limiting block (25) extends to the second chamber (21).

5. The upper and lower pen shell pulling force test fixture according to claim 1, characterized in that: The top of the support seat (24) is provided with a third sliding slot (241), and a sliding block (242) is slidably arranged in the third sliding slot (241), and the sliding block (242) is fixed on the limiting block (25), so that the limiting block (25) slides in the third sliding slot (241).

6. The upper and lower pen shell pulling force test fixture according to claim 5, characterized in that: ​

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