Clamp for sorting and detecting NTC (Negative Temperature Coefficient) high-precision chip thermistor

Abstract

The utility model relates to the field of manufacturing of electronic components, and discloses a clamp for sorting and detecting NTC high-precision chip thermistors, which comprises a working table, an arc-shaped top block is rotatably connected to the middle end of the working table, the bottom side of the arc-shaped top block is connected with the bottom side of the working table through a gear set, a side plate is fixedly connected to the top side of the working table, and the side plate is fixedly connected with the bottom side of the working table. A first partition plate is arranged on the top side of the workbench, a first sliding rod is fixedly connected to the inner wall of the first partition plate, a second partition plate is slidably connected to the outer wall of the first sliding rod, and silica gel clamping pads are connected to the outer wall of the second partition plate and the outer wall of the first partition plate through positioning assemblies. According to the utility model, through the synergistic effect of the electric push rod, the rack, the transmission gear and the arc-shaped top block, rapid clamping and loosening of the NTC thermistor are realized, the force and the position are accurately controlled, and the detection efficiency and the operation convenience are improved. And meanwhile, the inserting shaft, the fixing shell, the torsional spring and the cover plate are matched, so that the silica gel clamping pad is simple and easy to replace.

Description

Technical Field

[0001] This utility model relates to the field of electronic component manufacturing, and in particular to a fixture for sorting and testing NTC high-precision chip thermistors. Background Technology

[0002] In the field of electronic component manufacturing, NTC high-precision surface mount thermistors are widely used in key areas such as temperature sensing and circuit protection due to their high sensitivity and fast response speed. As electronic products become increasingly miniaturized and precise, higher demands are placed on the production accuracy and testing efficiency of NTC thermistors. Among these, the sorting and testing process, as a crucial step in controlling product quality, directly impacts product performance and reliability.

[0003] Currently, traditional fixtures for sorting and testing NTC high-precision surface-mount thermistors mostly employ spring or manual mechanical clamping structures. Spring clamping makes it difficult to precisely control the clamping force; excessive pressure can easily cause the thermistor ceramic substrate to crack or lead to poor electrode contact, resulting in product damage; insufficient pressure can cause the resistor to shift during testing, leading to significant errors in the test data. Manual clamping structures are not only inefficient but also rely heavily on the operator's experience and skill, making it difficult to ensure consistency in clamping position and force each time, thus failing to meet the needs of large-scale automated testing. Furthermore, existing fixtures often use a one-piece clamping design, making disassembly and installation cumbersome and time-consuming when the clamping pads wear out and need replacement, severely impacting equipment maintenance efficiency and normal operation. To address these technical problems, this application proposes a fixture for sorting and testing NTC high-precision surface-mount thermistors. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a high-precision NTC thermistor sorting and testing fixture. Through the coordinated action of an electric push rod, rack and pinion, transmission gear, and arc-shaped top block, it achieves rapid clamping and releasing of NTC thermistors, precisely controlling force and position, thus improving testing efficiency and operational convenience. Simultaneously, the interlocking shaft, fixed housing, torsion spring, and cover plate facilitate easy replacement of the silicone clamping pad, simplifying maintenance, ensuring proper clamping function, and reducing maintenance costs.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A high-precision NTC chip thermistor sorting and testing fixture includes a worktable. An arc-shaped top block is rotatably connected to the middle of the worktable. The bottom side of the arc-shaped top block is connected to the bottom side of the worktable via a gear set. A side plate is fixedly connected to the top side of the worktable. A partition plate is provided on the top side of the worktable. A slide rod is fixedly connected to the inner wall of the partition plate. A second partition plate is slidably connected to the outer wall of the slide rod. Both the second and the outer walls of the partition plate are connected to silicone clamping pads via positioning components. The top sides of both the second and the first partition plate are connected to the silicone clamping pads via locking components for disassembling and assembling the silicone clamping pads. A spring is provided on the outer wall of the slide rod.

[0007] Furthermore, the gear set includes a slide rod two fixedly connected to the bottom side of the workbench, a rack slidably connected to the outer wall of the slide rod two, and a transmission gear fixedly connected to the bottom end of the arc-shaped top block, wherein the transmission gear and the rack are meshed.

[0008] Furthermore, an electric push rod is mounted on the bottom side of the workbench via a fixing frame, and the drive end of the electric push rod is fixedly connected to the bottom side of the rack.

[0009] Furthermore, the positioning component includes a positioning block fixedly connected to the outer wall of the silicone clamping pad, and both the outer walls of the second partition and the first partition are provided with positioning grooves, with the positioning block disposed inside the positioning grooves.

[0010] Furthermore, the locking assembly includes a fixed shell that is fixedly connected to the top side of the partition one, the partition two, and the silicone clamping pad. The outer wall of the fixed shell is provided with a plug-in groove, and the interior of two adjacent plug-in grooves is provided with a plug-in shaft.

[0011] Furthermore, a cover plate is connected to the outer wall of the fixed shell by a torsion spring, and the cover plate is disposed on the outer wall of the insertion shaft.

[0012] Furthermore, one end of the spring facing the second partition is connected to the second partition, and the other end of the spring is connected to the outer wall of the first partition.

[0013] This utility model has the following beneficial effects:

[0014] 1. In this utility model, the rapid clamping and releasing of NTC high-precision chip thermistors is achieved through the coordinated action of components such as an electric push rod, rack and pinion, transmission gear, and arc-shaped top block. It can precisely control the clamping force and position, ensuring the thermistor is firmly fixed during testing and can be quickly released after testing, thus improving testing efficiency and operational convenience.

[0015] 2. In this utility model, the cooperation of components such as the plug-in shaft, fixed shell, torsion spring, and cover plate provides a simple and easy operation method for replacing the silicone clamping pad. This not only facilitates maintenance for operators but also ensures that the replaced clamping pad can be firmly installed on the partition, guaranteeing the normal functioning of the clamping mechanism. Attached Figure Description

[0016] Figure 1 This is a perspective view of a high-precision NTC chip thermistor sorting and testing fixture proposed in this utility model.

[0017] Figure 2 This is a schematic diagram of the workbench structure of a high-precision NTC chip thermistor sorting and testing fixture proposed in this utility model;

[0018] Figure 3 This is a schematic diagram of the arc-shaped top block structure of a fixture for sorting and detecting NTC high-precision chip thermistors proposed in this utility model.

[0019] Figure 4 for Figure 3 Enlarged view of point A in the image.

[0020] Legend:

[0021] 1. Workbench; 2. Side plate; 3. Slide rod one; 4. Partition one; 5. Arc-shaped top block; 6. Silicone clamping pad; 7. Fixed shell; 8. Spring; 9. Transmission gear; 10. Slide rod two; 11. Rack; 12. Electric push rod; 13. Positioning groove; 14. Positioning block; 15. Plug-in shaft; 16. Cover plate; 17. Partition two. Detailed Implementation

[0022] 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.

[0023] Reference Figures 1-3This utility model provides an embodiment of a high-precision NTC chip thermistor sorting and testing fixture, comprising a worktable 1, an arc-shaped top block 5 rotatably connected to the middle of the worktable 1, a slide rod 10 fixedly connected to the bottom side of the worktable 1, a rack 11 slidably connected to the outer wall of the slide rod 10, a transmission gear 9 fixedly connected to the bottom end of the arc-shaped top block 5, the transmission gear 9 and the rack 11 being meshed, an electric push rod 12 mounted on the bottom side of the worktable 1 via a fixing frame, the drive end of the electric push rod 12 fixedly connected to the bottom side of the rack 11, and a side plate 2 fixedly connected to the top side of the worktable 1. A partition 4 is provided on the top side of 1. A slide rod 3 is fixedly connected to the inner wall of the partition 4. A partition 17 is slidably connected to the outer wall of the slide rod 3. A positioning block 14 is fixedly connected to the outer wall of the silicone clamping pad 6. Positioning grooves 13 are provided on the outer walls of both the partition 17 and the partition 4. The positioning block 14 is located inside the positioning groove 13. A fixing shell 7 is fixedly connected to the partition 4, the partition 17 and the top side of the silicone clamping pad 6. An insertion groove is opened on the outer wall of the fixing shell 7. An insertion shaft 15 is provided inside the two adjacent insertion grooves for disassembling and assembling the silicone clamping pad 6. A spring 8 is provided on the outer wall of the slide rod 3.

[0024] Specifically, when clamping the NTC high-precision surface-mount thermistor, the electric push rod 12 is first activated, causing it to push the rack 11 to slide along the outer wall of the slide bar 10. Since there is a meshing relationship between the rack 11 and the transmission gear 9, the sliding of the rack 11 will drive the transmission gear 9 to rotate. The rotation of the transmission gear 9 will further drive the arc-shaped top block 5 to rotate. When the arc-shaped top block 5 rotates to the appropriate position, it will press against the outer wall of the partition 17, thereby pushing the partition 17 to slide along the outer wall of the slide bar 3. During the sliding process of the partition 17, the spring 8 on its outer wall will be compressed. As the spring 8 is compressed, the distance between the partition 17 and the partition 4 gradually decreases, ultimately achieving the clamping and fixing of the NTC high-precision surface-mount thermistor to be tested. When it is necessary to release the clamped NTC high-precision chip thermistor, simply retract the electric push rod 12. The engagement between the rack 11 and the transmission gear 9 controls the rotation of the arc-shaped top block 5, preventing it from pressing against the outer wall of the partition 17. At this time, the previously compressed spring 8, through its own reset function, pushes the partition 17 along the outer wall of the slide rod 3, thereby releasing the clamped NTC high-precision chip thermistor. If the silicone clamping pad 6 is damaged, it can be replaced using the following steps: First, lift the cover plate 16 and pull the insertion shaft 15 out of the fixed housing 7. Next, pull the silicone clamping pad 6 and the positioning block 14 out of the positioning groove 13 on the outer wall of the partition 4. Then, insert the new silicone clamping pad 6 into the positioning groove 13 through the positioning block 14. Finally, insert the plug shaft 15 back into the two fixed shells 7, and use the elasticity of the torsion spring to cover the outer wall of the plug shaft 15, thereby completing the replacement operation of the silicone clamping pad 6.

[0025] Reference Figures 2-4 The outer wall of the fixed shell 7 is connected to the cover plate 16 by a torsion spring. The cover plate 16 is set on the outer wall of the plug shaft 15. One end of the spring 8 facing the partition 2 17 is connected to the partition 2 17, and the other end of the spring 8 is connected to the outer wall of the partition 1 4.

[0026] Specifically, the outer side of the fixed shell 7 is connected to the cover plate 16 via a torsion spring. The cover plate 16 is located outside the insertion shaft 15, which can prevent the insertion shaft 15 from detaching from the inside of the fixed shell 7. One end of the spring 8 is connected to the second partition 17, and the other end is connected to the outer wall of the first partition 4, which can control the sliding of the second partition 17.

[0027] Working principle: First, when clamping the NTC high-precision chip thermistor to be tested, the sliding of rack 11 on the outer wall of slide bar 2 10 can be controlled by activating electric push rod 12. Through the meshing between rack 11 and transmission gear 9, the rotation of arc-shaped top block 5 is controlled. Arc-shaped top block 5 presses against the outer wall of partition 2 17, pushing partition 2 17 to slide on the outer wall of slide bar 1 3, compressing the spring 8 on the outer wall of slide bar 1 3, thus bringing the distance between partition 2 17 and partition 1 4 closer, clamping and fixing the NTC high-precision chip thermistor to be tested. The retraction of electric push rod 12 pulls the meshing between rack 11 and transmission gear 9 to control the arc-shaped top block 5. The rotation of the top block 5 causes the arc-shaped top block 5 to no longer press against the outer wall of the partition 2 17. At this time, the compressed spring 8 releases the NTC high-precision chip thermistor by controlling the sliding of the partition 2 17 on the outer wall of the slide rod 1 3 through the reset control. When the silicone clamping pad 6 is damaged, the plug shaft 15 can be pulled out from the inside of the fixed shell 7 by lifting the cover plate 16, and then the silicone clamping pad 6 and the positioning block 14 can be pulled out from the positioning groove 13 on the outer wall of the partition 1 4. Then, the new silicone clamping pad 6 can be inserted into the inside of the positioning groove 13 through the positioning block 14, and then the plug shaft 15 can be inserted into the inside of the two fixed shells 7. Then, the cover plate 16 is covered on the outer wall of the plug shaft 15 by the torsion spring, so as to realize the replacement of the silicone clamping pad 6.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 fixture for sorting and detecting NTC high-precision surface-mount thermistors, characterized in that, The workbench (1) is rotatably connected to an arc-shaped top block (5) at its middle end. The bottom side of the arc-shaped top block (5) is connected to the bottom side of the workbench (1) via a gear set. A side plate (2) is fixedly connected to the top side of the workbench (1). A partition (4) is provided on the top side of the workbench (1). A slide rod (3) is fixedly connected to the inner wall of the partition (4). A partition (17) is slidably connected to the outer wall of the slide rod (3). A silicone clamping pad (6) is connected to the outer walls of both the partition (17) and the partition (4) via a positioning assembly. The top sides of both the partition (17) and the partition (4) are connected to the silicone clamping pad (6) via a locking assembly for disassembling and assembling the silicone clamping pad (6). A spring (8) is provided on the outer wall of the slide rod (3).

2. The clamp for sorting and detecting NTC high-precision chip thermistors according to claim 1, characterized in that: The gear set includes a slide bar 2 (10) fixedly connected to the bottom side of the workbench (1), a rack (11) slidably connected to the outer wall of the slide bar 2 (10), and a transmission gear (9) fixedly connected to the bottom end of the arc-shaped top block (5). The transmission gear (9) and the rack (11) are meshed.

3. The fixture for sorting and detecting NTC high-precision chip thermistors according to claim 2, characterized in that: An electric push rod (12) is mounted on the bottom side of the workbench (1) via a fixed frame, and the drive end of the electric push rod (12) is fixedly connected to the bottom side of the rack (11).

4. The clamp for sorting and detecting NTC high-precision chip thermistors according to claim 1, characterized in that: The positioning component includes a positioning block (14) fixedly connected to the outer wall of the silicone clamping pad (6). The outer walls of the second partition (17) and the first partition (4) are both provided with positioning grooves (13), and the positioning block (14) is located inside the positioning groove (13).

5. The clamp for sorting and detecting NTC high-precision chip thermistors according to claim 1, characterized in that: The locking assembly includes a fixed shell (7) fixedly connected to the top side of the partition 1 (4), partition 2 (17) and silicone clamping pad (6). The outer wall of the fixed shell (7) is provided with a plug-in groove, and the interior of two adjacent plug-in grooves is provided with a plug-in shaft (15).

6. The fixture for sorting and detecting NTC high-precision chip thermistors according to claim 5, characterized in that: The outer wall of the fixed shell (7) is connected to a cover plate (16) by a torsion spring, and the cover plate (16) is disposed on the outer wall of the plug shaft (15).

7. The fixture for sorting and detecting NTC high-precision chip thermistors according to claim 1, characterized in that: The spring (8) is connected to the second partition (17) at one end and to the second partition (17) at the other end, and to the outer wall of the first partition (4).

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