Device for detecting unscrewing torque of syringe protective cap

Abstract

The utility model relates to injector protective cap unscrewing torque detection equipment, and aims to solve the problems that part of current detection equipment depends on an electronic sensor to detect torque, data distortion is easily caused by environmental vibration interference, part of mechanical equipment lacks an intuitive quantification means, whether the torque is qualified or not can be judged only through operation hand feeling, and the detection cost is low. The device comprises a base and a lifting frame, the top end of the lifting frame is fixedly connected with a top frame, a sliding rod is fixedly connected between the left inner side wall and the right inner side wall of the top frame, and the surface of the sliding rod is slidably connected with a first circular plate and a second circular plate. The twisting block is driven to rotate to unscrew the protective cap; meanwhile, the first circular plate moves to push the L-shaped rod to rotate around the supporting rod, the pointing direction of the top end of the L-shaped rod on the scale plate directly reflects the torque value, direct reading can be achieved without electronic elements, environment interference of electronic detection is avoided, and the problem that quantification cannot be achieved through pure mechanical tools is solved.

Description

Technical Field

[0001] This utility model relates to the field of torque detection technology, specifically to a syringe cap unscrewing torque detection device. Background Technology

[0002] As a commonly used medical device, the tightening and unscrewing performance of the syringe cap directly affects its safety and ease of use. The cap, as a crucial component of the syringe, primarily serves to seal the needle, prevent contamination, and protect medical personnel and patients. Before clinical use, medical staff must unscrew the cap to perform injections, and whether the cap's unscrewing torque is within a reasonable range is one of the key indicators for evaluating syringe performance.

[0003] Current syringe cap unscrewing torque testing equipment has significant limitations: some devices rely on electronic sensors to detect torque, which are susceptible to data distortion due to environmental vibrations, and are also complex in structure and have high maintenance costs; other purely mechanical testing tools lack intuitive quantitative methods, relying solely on tactile feedback to determine torque compliance, making it inconvenient to observe numerical values ​​and hindering consistency comparisons between different batches of products. Therefore, a new technical solution is proposed to address these limitations. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a syringe cap unscrewing torque detection device to solve the technical problems of some current detection devices relying on electronic sensors to detect torque, which are easily affected by environmental vibration interference, resulting in data distortion, and some mechanical devices lack intuitive quantitative means, and can only judge whether the torque is qualified by the operation feel, which is inconvenient to observe the value.

[0005] To achieve the purpose of this utility model, the technical solution adopted by this utility model is as follows: a syringe cap unscrewing torque detection device is designed, including a base and a lifting frame. A top frame is fixedly connected to the top of the lifting frame, and a sliding rod is fixedly connected between the left and right inner side walls of the top frame. A first circular plate and a second circular plate are slidably connected to the surface of the sliding rod. A spring is fixedly connected between the first circular plate and the second circular plate. A top groove is provided on the top surface of the top frame. Two support blocks are fixedly connected to the surface of the top frame at the front and rear edges of the top groove. A support rod passes through the surface of the two support blocks and is rotatably connected to the support rod. The support rod passes through an L-shaped rod and is fixedly connected to the L-shaped rod. A scale plate is fixedly connected to the surface of the top frame on one side of the L-shaped rod.

[0006] In this solution, the pusher rod compresses the spring of the first circular plate. The spring deformation force is transmitted to the gear through the second circular plate and the sleeve block, which drives the torsion block to rotate and unscrew the cap. At the same time, the first circular plate moves and pushes the L-shaped rod to rotate around the support rod. The direction of its top on the scale plate directly reflects the torque value, which can be read intuitively without electronic components. This avoids environmental interference from electronic detection and solves the problem that pure mechanical tools cannot quantify.

[0007] Preferably, the surface of the lifting frame has a mounting groove in the center, a movable block is inserted into the inner side of the mounting groove, and the movable block is detachably connected to the lifting frame by bolts. A torsion block passes through the surface of the movable block, and the torsion block is rotatably connected to the torsion block by a bearing seat.

[0008] In practical applications, when it is necessary to test syringe caps of different specifications, the movable block with the matching torsion block can be quickly replaced by removing the bolts, without replacing the entire equipment, which greatly reduces the adaptation cost.

[0009] Preferably, a gear is fixedly connected to the top of the torsion block, the second circular plate is fixedly connected to the sleeve block, the sleeve block is penetrated by a sliding rod and slidably connected to the sliding rod, and the side wall of the sleeve block is provided with several protruding teeth, and the gear meshes with the protruding teeth.

[0010] In practical applications, gear and convex tooth transmission structures can achieve force conversion without electronic components, and the transmission ratio is fixed, ensuring a linear correspondence between torque and spring deformation. The test data has high repeatability, making it particularly suitable for batch testing scenarios on production lines.

[0011] Preferably, the lower end passes through the top groove and contacts the first circular plate, and the side wall of the top frame is provided with a pressing rod, which is slidably connected to the top frame. At the same time, one end of the pressing rod passing through the top frame is fixedly connected to the first circular plate.

[0012] In practical applications, the operator pushes the extrusion rod to drive the No. 1 circular plate to compress the spring. The spring's reaction force is transmitted to the torsion block through the No. 2 circular plate, the sleeve block, and the gear, forming the torque to unscrew the protective cap. The entire process requires no complicated steps and can be completed by a single person. It is especially suitable for medical staff or production line workers to quickly get started and improve testing efficiency.

[0013] Preferably, one end of the support rod is fixedly connected to a ratchet, the ratchet is located on one side of the top frame, and a spring is fixedly connected to the side wall of the top frame, the spring contacting the ratchet.

[0014] In practical applications, the spring is released due to elasticity the moment the cap is unscrewed. At this time, the ratchet cannot rotate in the opposite direction due to the locking action of the spring plate. The L-shaped rod always stays at the scale position corresponding to the maximum torque, avoiding the problem of peak torque being difficult to capture due to spring rebound in traditional equipment.

[0015] Preferably, side frames are fixedly connected to both sides of the top of the base, and limit rods are fixedly connected between the upper and lower inner walls of the side frames. The two ends of the lifting frame are respectively penetrated by the limit rods on both sides and slidably connected to the limit rods. The lifting frame is parallel to the surface of the base.

[0016] In practical applications, the lifting frame can be slid up and down along the limiting rod according to the length of the syringe, adjusting the distance between the torsion block and the base clamp to ensure that the protective cap is exactly aligned with the torsion block, thus improving the versatility of the device.

[0017] Preferably, the base has an adjustment groove at the top center, and a bidirectional lead screw is rotatably connected between the inner walls of the adjustment groove. Two threaded sleeves pass through the surface of the bidirectional lead screw and are threadedly connected to the threaded sleeves. A clamping seat is fixedly connected to the top of the threaded sleeve.

[0018] In practical applications, rotating the bidirectional lead screw can make the two clamping seats move closer or further apart synchronously, quickly clamping syringes of different diameters. The silicone pad inside the clamping seat conforms to the surface of the syringe through elastic deformation, which not only avoids damaging the syringe, but also prevents the syringe from rotating during testing through friction.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] 1. This utility model uses a spring, a first circular plate, and a second circular plate on the surface of a slide rod, combined with the meshing transmission of gears and convex teeth, to perform mechanical quantitative detection of torque. During detection, pushing the compression rod causes the first circular plate to compress the spring. The spring deformation force is transmitted to the gear through the second circular plate and the sleeve block, causing the torsion block to rotate and unscrew the protective cap. At the same time, the movement of the first circular plate pushes the L-shaped rod to rotate around the support rod. The direction of its top on the scale plate directly reflects the torque value, which can be read intuitively without electronic components. This avoids environmental interference in electronic detection and solves the problem of quantification that pure mechanical tools cannot solve, facilitating comparison of products in the same batch.

[0021] 2. This utility model ensures precise locking of the maximum torque value by setting a ratchet and spring plate cooperation structure at one end of the support rod. During the testing process, the L-shaped rod moves with the first circular plate, driving the ratchet to rotate, and the spring plate always keeps in contact with the ratchet tooth surface; when the protective cap is unscrewed, the spring releases its elastic force, and the ratchet cannot rotate in the opposite direction due to the obstruction of the spring plate. The L-shaped rod remains at the maximum deflection position, accurately pointing to the maximum torque value on the scale plate, which facilitates the operator to record key data and improves the reliability and convenience of the test results. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall design of this utility model;

[0023] Figure 2 This is a cross-sectional schematic diagram of the adjusting groove of this utility model;

[0024] Figure 3 This is a partial enlarged view of point A of this utility model;

[0025] Figure 4 This is a schematic diagram of the sliding rod of this utility model;

[0026] In the diagram: 1. Base; 101. Adjustment groove; 2. Two-way lead screw; 201. Threaded sleeve; 202. Clamping seat; 3. Side frame; 301. Limiting rod; 4. Lifting frame; 401. Mounting groove; 5. Movable block; 6. Torsion block; 601. Gear; 7. Top frame; 8. Slide rod; 9. Sleeve block; 901. Convex tooth; 10. Spring; 11. No. 1 circular plate; 12. No. 2 circular plate; 13. Extrusion rod; 14. Top groove; 15. Support block; 16. L-shaped rod; 17. Support rod; 18. Ratchet; 19. Spring piece; 20. Scale plate. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0028] Example 1: A syringe cap unscrewing torque detection device, see [link / reference] Figures 1 to 4 The system includes a base 1 and a lifting frame 4. A top frame 7 is fixedly connected to the top of the lifting frame 4. A sliding rod 8 is fixedly connected between the left and right inner side walls of the top frame 7. The sliding rod 8 has a square cross-section, which ensures that the first circular plate 11, the second circular plate 12, and the sleeve block 9 will not shift or rotate during sliding. The surface of the sliding rod 8 is slidably connected to the first circular plate 11 and the second circular plate 12. The friction between the first circular plate 11 and the second circular plate 12 and the sliding rod 8 is minimal. A spring 10 is fixedly connected between the first circular plate 11 and the second circular plate 12. The stiffness of the spring 10 is calibrated, for example, 1 N·cm of torque corresponds to 0.5 mm of axial compression. Therefore, the scale plate 20 can be set according to the compression and the lifting angle of the L-shaped rod 16. The scale on the surface, and after the first use or replacement of the spring 10, can push the compression rod 13 to the preset scale to verify the correspondence between the compression amount and torque of the spring 10; the compression rod 13 passes through the side wall of the top frame 7, and the compression rod 13 is slidably connected to the top frame 7, while one end of the compression rod 13 passing through the top frame 7 is fixedly connected to the first circular plate 11; while the second circular plate 12 is fixedly connected to the sleeve block 9, the sleeve block 9 is passed through by the slide rod 8 and slidably connected to the slide rod 8, the side wall of the sleeve block 9 is provided with several protruding teeth 901, the top of the torsion block 6 is fixedly connected to the gear 601, the gear 601 meshes with the protruding teeth 901, when the sleeve block 9 slides along the surface of the slide rod 8, it will apply force to the torsion block 6 below due to the meshing of the protruding teeth 901 and the gear 601.

[0029] Meanwhile, the top surface of the top frame 7 is provided with a top groove 14. Two support blocks 15 are fixedly connected to the surface of the top frame 7 at the front and rear edges of the top groove 14. Support rods 17 pass through the surfaces of the two support blocks 15 and are rotatably connected to the support rods 17. The support rods 17 will not detach from the support blocks 15 while maintaining their own rotation. The support rods 17 pass through the L-shaped rods 16 and are fixedly connected to the L-shaped rods 16. The lower end of the L-shaped rods 16 passes through the top groove 14 and contacts the first circular plate 11. A scale plate 20 is fixedly connected to the surface of the top frame 7 on one side of the L-shaped rods 16. When the L-shaped rods 16 are not rotated, the part of them located on the surface of the top frame 7 will remain horizontal. The end of the L-shaped rods 16 near the scale plate 20 will be made with a sharp corner to facilitate observation of the specific position it points to.

[0030] In the above technical solution, the operator pushes the squeezing rod 13, causing the first circular plate 11 to slide along the slide rod 8 towards the second circular plate 12, compressing the spring 10 and generating elastic force. This elastic force pushes the second circular plate 12, causing the sleeve block 9 to move synchronously. The protruding teeth 901 on the side wall of the sleeve block 9 mesh with the gear 601, thereby driving the torsion block 6 to rotate, thus opening the syringe cap. Before reaching the required torque for the cap, the spring 10 will continue to compress until it is suddenly released after being opened. Simultaneously, the movement of the first circular plate 11 pushes the L-shaped rod 16 to rotate around the support rod 17. The direction of its tip on the scale plate 20 changes with the compression of the spring 10, directly reflecting the current torque value. This purely mechanical structure achieves quantitative transmission and visual reading of torque, eliminating the need for electronic sensors and avoiding interference from environmental vibrations on detection accuracy. The linear deformation characteristics of the spring 10 ensure stable and reliable torque values, while the cooperation between the L-shaped rod 16 and the scale plate 20 makes reading more intuitive and convenient.

[0031] Specifically, such as Figure 3 As shown, one end of the support rod 17 is fixedly connected to the ratchet 18, which is located on one side of the top frame 7. A spring piece 19 is fixedly connected to the side wall of the top frame 7, and the spring piece 19 contacts the ratchet 18. When the L-shaped rod 16 rotates, the support rod 17 drives the ratchet 18 to rotate synchronously. The tooth surface of the ratchet 18 presses the spring piece 19 to produce elastic deformation. After the tooth surface passes the spring piece 19, the spring piece 19 resets and locks into the next tooth groove, realizing the unidirectional rotation locking of the ratchet 18. When the cap is unscrewed, the spring 10 releases elastic potential energy, and the ratchet 18 cannot rotate in the opposite direction due to the obstruction of the spring piece 19. Therefore, the L-shaped rod 16 will maintain the maximum deflection angle and accurately point to the maximum torque value on the scale plate 20, which is convenient for operators to record key data and improves the reliability and convenience of the test results.

[0032] Furthermore, such as Figure 1As shown, side frames 3 are fixedly connected to both sides of the top of the base 1. Limiting rods 301 are fixedly connected between the upper and lower inner walls of the side frames 3. The two ends of the lifting frame 4 are respectively penetrated by the limiting rods 301 on both sides and slidably connected to the limiting rods 301. The lifting frame 4 is parallel to the surface of the base 1. According to the length specification of the syringe, the lifting frame 4 can slide up and down along the limiting rods 301 to adjust the height, so that the torsion block 6 is precisely aligned with the syringe cap. The height adjustment can adapt to syringes of different lengths, improving the versatility of the equipment.

[0033] It is worth noting that, see Figure 2 The lifting frame 4 has a mounting groove 401 in the center of its surface. A movable block 5 is inserted into the inner side of the mounting groove 401 and is detachably connected to the lifting frame 4 by bolts. A torsion block 6 runs through the surface of the movable block 5 and is rotatably connected to the torsion block 6 by a bearing seat. The torsion block 6 is fixed to the inner ring of the bearing seat, and the outer ring of the bearing seat is fixed to the inner wall of the movable block 5, thus ensuring that the torsion block 6 does not fall off. The movable block 5 is fixed in the mounting groove 401 by bolts. The torsion block 6 can be replaced with a suitable one according to the size and specifications of the syringe cap, which can accommodate various cap types and enhance the practicality of the equipment. The movable block 5 is inserted from below to avoid affecting the upper structure.

[0034] It is worth noting that, such as Figure 2 As shown, an adjustment groove 101 is provided at the center of the top of the base 1. A bidirectional lead screw 2 is rotatably connected between the inner walls of the adjustment groove 101. Two threaded sleeves 201 pass through the surface of the bidirectional lead screw 2 and are threadedly connected to the threaded sleeves 201. A clamping seat 202 is fixedly connected to the top of the threaded sleeves 201. When the bidirectional lead screw 2 is rotated, the two threaded sleeves 201 move synchronously in opposite directions, driving the clamping seat 202 to clamp or release the syringe barrel. The groove of the clamping seat 202 can clamp and fix syringes of various sizes, improving the practicality and versatility of the device.

[0035] In addition, all components designed in this utility model are general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. Those skilled in the art can fully implement them, so there is no need to elaborate. The content protected by this utility model does not involve improvements to the internal structure and method.

[0036] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A syringe cap unscrewing torque detection device, comprising a base (1) and a lifting frame (4), characterized in that, The top of the lifting frame (4) is fixedly connected to a top frame (7). A sliding rod (8) is fixedly connected between the left and right inner walls of the top frame (7). A first circular plate (11) and a second circular plate (12) are slidably connected to the surface of the sliding rod (8). A spring (10) is fixedly connected between the first circular plate (11) and the second circular plate (12). The top surface of the top frame (7) is provided with a top groove (14). Two support blocks (15) are fixedly connected to the surface of the top frame (7) at the front and rear edges of the top groove (14). A support rod (17) passes through the surface of the two support blocks (15) and is rotatably connected to the support rod (17). The support rod (17) passes through the L-shaped rod (16) and is fixedly connected to the L-shaped rod (16). A scale plate (20) is fixedly connected to the surface of the top frame (7) on one side of the L-shaped rod (16).

2. The syringe cap unscrewing torque detection device as described in claim 1, characterized in that, The lifting frame (4) has a mounting groove (401) in the center of its surface. A movable block (5) is inserted into the inner side of the mounting groove (401). The movable block (5) is detachably connected to the lifting frame (4) by bolts. A torsion block (6) runs through the surface of the movable block (5). The torsion block (6) is rotatably connected to the torsion block (6) by a bearing seat.

3. The syringe cap unscrewing torque detection device as described in claim 2, characterized in that, The top of the twist block (6) is fixedly connected to a gear (601), the second circular plate (12) is fixedly connected to the sleeve block (9), the sleeve block (9) is penetrated by the slide rod (8) and slidably connected to the slide rod (8), the side wall of the sleeve block (9) is provided with several protruding teeth (901), and the gear (601) meshes with the protruding teeth (901).

4. The syringe cap unscrewing torque detection device as described in claim 1, characterized in that, The lower end of the L-shaped rod (16) passes through the top groove (14) and contacts the first circular plate (11). The side wall of the top frame (7) is penetrated by a pressing rod (13), and the pressing rod (13) is slidably connected to the top frame (7). At the same time, one end of the pressing rod (13) that passes through the top frame (7) is fixedly connected to the first circular plate (11).

5. The syringe cap unscrewing torque detection device as described in claim 1, characterized in that, One end of the support rod (17) is fixedly connected to the ratchet (18), the ratchet (18) is located on one side of the top frame (7), and a spring piece (19) is fixedly connected to the side wall of the top frame (7), the spring piece (19) is in contact with the ratchet (18).

6. The syringe cap unscrewing torque detection device as described in claim 1, characterized in that, The top two sides of the base (1) are fixedly connected to side frames (3), and the upper and lower inner walls of the side frames (3) are fixedly connected to limit rods (301). The two ends of the lifting frame (4) are respectively penetrated by the limit rods (301) on both sides and slidably connected to the limit rods (301). The lifting frame (4) is parallel to the surface of the base (1).

7. The syringe cap unscrewing torque detection device as described in claim 1, characterized in that, The base (1) has an adjustment groove (101) at the center of its top end. A bidirectional lead screw (2) is rotatably connected between the inner walls of the adjustment groove (101). Two threaded sleeves (201) pass through the surface of the bidirectional lead screw (2) and are threadedly connected to the threaded sleeves (201). A clamping seat (202) is fixedly connected to the top end of the threaded sleeves (201).

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