A thin-film switch resistance value testing device

Abstract

This utility model relates to the field of membrane switch resistance value testing technology, and discloses a membrane switch resistance value testing device, including a tester. A motor is fixedly connected to the top of the tester, and a threaded central shaft is fixedly connected to the output end of the motor. Multiple supporting columns are fixedly connected inside the tester, and an upper pressure plate is slidably connected to the outer wall of the multiple supporting columns. A contact plate is fixedly connected inside the tester, and a sensor is provided at the bottom of the upper pressure plate. The threaded central shaft is threadedly connected inside the upper pressure plate. In this utility model, an electric telescopic rod drives a push rod to move, and then the push rod pushes the contact plate to slide along the guide rail to the outside of the device. This eliminates the need for the operator to put their hand into the device when placing and removing the membrane switch, thereby improving operational safety and convenience. It solves the problem of inconvenient operation caused by the limited space of traditional testing devices, and improves the practicality of the device.

Description

Technical Field

[0001] This utility model relates to the field of thin-film switch resistance value testing technology, and in particular to a thin-film switch resistance value testing device. Background Technology

[0002] Membrane switches, as crucial human-machine interface components in modern electronic devices, directly impact product reliability and lifespan due to their resistance performance. With the rapid growth in demand for membrane switches in consumer electronics, medical devices, and industrial control, higher requirements are being placed on the accurate testing of switch resistance values. Traditional testing methods primarily rely on manual operation of multimeters for point measurements, which is not only inefficient but also highly susceptible to human error. In industrial production scenarios, there is a need to develop a dedicated testing device capable of automated testing, data recording, and convenient operation to meet the quality inspection requirements of mass production. This is particularly true in high-end applications such as automotive electronics and aerospace, where the stability of membrane switch contact resistance is extremely critical, demanding even higher standards for the accuracy and repeatability of the testing device.

[0003] In the existing technology, most membrane switch testing equipment adopts a manual pressing structure. During testing, the operator needs to place the switch sample on the test platform and then manually operate the pressing rod to make the test probe contact the switch contacts. Some highly automated equipment uses pneumatic or electric drive to achieve the pressing action.

[0004] The main problem with existing technologies is the inconvenience caused by the limited testing space. Due to the structural design limitations of the testing device, operators often need to reach into the narrow space inside the device to place and remove membrane switch samples. This not only increases the difficulty of operation and affects testing efficiency, but also easily leads to problems such as improper sample placement or accidental contact of the test probe due to space constraints during frequent operations. Especially when conducting large-scale continuous testing, this inconvenience will significantly reduce the overall testing efficiency and easily lead to an increase in the test error rate due to operator fatigue. To address these issues, a membrane switch resistance value testing device is proposed. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a thin-film switch resistance value testing device, which aims to improve the structural design limitations of existing testing devices and the inconvenience caused by the small testing space.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A thin-film switch resistance value testing device includes a tester, a motor fixedly connected to the top of the tester, a threaded central shaft fixedly connected to the output end of the motor, multiple support columns fixedly connected inside the tester, an upper pressure plate slidably connected to the outer wall of the multiple support columns, a contact plate fixedly connected inside the tester, a sensor disposed at the bottom of the upper pressure plate, the threaded central shaft threadedly connected inside the upper pressure plate, and a pushing component disposed on the outer wall of the contact plate;

[0008] The pushing component includes a push rod and a guide rail. The push rod is fixedly connected to the outer wall of the contact plate. The bottom of the guide rail is fixedly connected to the inside of the tester. The tester is equipped with a driving component. The contact plate is slidably connected to the top of the guide rail. A limit block is fixedly connected to the side wall of the guide rail. A hollow column is fixedly connected to the inside of the upper pressure plate. A disassembly component is provided inside the hollow column.

[0009] As a further description of the above technical solution:

[0010] The drive assembly includes an electric telescopic rod, and one end of the push rod is fixedly connected to the output end of the electric telescopic rod.

[0011] As a further description of the above technical solution:

[0012] The disassembly assembly includes a retaining ball that is slidably connected inside the hollow column and engages with the inside of the sensor.

[0013] As a further description of the above technical solution:

[0014] A trapezoidal column is slidably connected inside the hollow column, and the outer wall of the trapezoidal column is in contact with the outer wall of the ball.

[0015] As a further description of the above technical solution:

[0016] A pressing column is fixedly connected to the top of the trapezoidal column, and a pressing cap is fixedly connected to the top of the pressing column.

[0017] As a further description of the above technical solution:

[0018] A fixed plate is fixedly connected to the inner wall of the hollow column, and the pressing column is slidably connected inside the fixed plate.

[0019] As a further description of the above technical solution:

[0020] The hollow column is slidably connected to a sliding disk, and the pressing column is slidably connected inside the sliding disk.

[0021] As a further description of the above technical solution:

[0022] A spring is fitted on the outer wall of the pressing column. One end of the spring is fixedly connected to the bottom of the sliding plate, and the other end of the spring is fixedly connected to the top of the fixed plate.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, the push rod is moved by the electric telescopic rod, and then the contact plate is pushed along the guide rail to slide to the outside of the device by the push rod. This makes it possible to place and remove the membrane switch without the operator having to put their hands into the device, thereby improving the safety and convenience of operation. It solves the problem of inconvenient operation caused by the small space of traditional testing devices and improves the practicality of the device.

[0025] 2. In this utility model, pressing the pressing cap moves the pressing column downward, and then the pressing column pushes the trapezoidal column to squeeze the retaining ball, causing the retaining ball to disengage from the sensor, thereby achieving quick sensor disassembly. Conversely, the spring's reset action drives the sliding plate and pressing column back to their original positions, and then the inclined surface of the trapezoidal column guides the retaining ball to re-enter the sensor, thereby achieving quick sensor installation. This facilitates individual sensor calibration and maintenance, solves the maintenance difficulties caused by the fixed and non-removable sensor in traditional devices, and improves the maintainability of the device. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of a thin-film switch resistance value testing device proposed in this utility model;

[0027] Figure 2 This is a schematic diagram of the push rod structure of a thin-film switch resistance value testing device proposed in this utility model;

[0028] Figure 3 This is a schematic diagram of the upper pressure plate structure of a thin-film switch resistance value testing device proposed in this utility model;

[0029] Figure 4 This is a schematic diagram of the sensor structure of a thin-film switch resistance value testing device proposed in this utility model;

[0030] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0031] Legend:

[0032] 1. Tester; 2. Motor; 3. Upper pressure plate; 4. Threaded central shaft; 5. Sensor; 6. Contact plate; 7. Support column; 8. Electric telescopic rod; 9. Push rod; 10. Guide rail; 11. Limit block; 12. Press cap; 13. Hollow column; 14. Press column; 15. Sliding plate; 16. Spring; 17. Fixed plate; 18. Ball clamp; 19. Trapezoidal column. Detailed Implementation

[0033] 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.

[0034] Reference Figures 1-5 This utility model provides an embodiment of a membrane switch resistance value testing device, including a tester 1, which serves as the main body of the device and provides support and testing functions. A motor 2 is fixedly connected to the top of the tester 1, which provides power output for the entire testing process. A threaded shaft 4 is fixedly connected to the output end of the motor 2, which converts rotational motion into linear motion. Multiple support columns 7 are fixedly connected inside the tester 1, which provide vertical guidance for the upper pressure plate 3. The upper pressure plate 3 is slidably connected to the outer wall of the multiple support columns 7, and is used to apply test pressure. A contact plate 6 is fixedly connected inside the tester 1, which serves as a test platform for placing the membrane switch to be tested. A sensor 5 is provided at the bottom of the upper pressure plate 3, which monitors the test pressure in real time. The threaded shaft 4 is threadedly connected inside the upper pressure plate 3 to realize the lifting and lowering control of the pressure mechanism. A pushing component is provided on the outer wall of the contact plate 6.

[0035] The push component enables the automatic entry and exit of the test platform. The push component includes a push rod 9 and a guide rail 10. The push rod 9 provides linear pushing force, and the guide rail 10 ensures smooth movement. The push rod 9 is internally fixedly connected to the outer wall of the contact plate 6 to achieve linkage of the contact plate 6. The bottom of the guide rail 10 is fixedly connected to the inside of the tester 1 to provide a stable sliding track. The tester 1 is equipped with a drive component that provides power for pushing. The contact plate 6 is slidably connected to the top of the guide rail 10 to ensure linear movement of the contact plate 6. The side wall of the guide rail 10 is fixedly connected to a limit block 11, which controls the stroke of the contact plate 6. The upper pressure plate 3 is internally fixedly connected to a hollow column 13, which serves as the mounting base for the sensor 5. The hollow column 13 is internally equipped with a disassembly component that enables quick replacement of the sensor 5.

[0036] Reference Figures 1-5The drive assembly includes an electric telescopic rod 8, which provides linear driving force for the pushing action. One end of a push rod 9 is fixedly connected to the output end of the electric telescopic rod 8 to achieve power transmission. The disassembly assembly includes a locking ball 18, which enables quick locking and unlocking of the sensor 5. The locking ball 18 is slidably connected inside the hollow column 13 to ensure smooth radial movement. The locking ball 18 engages with the inside of the sensor 5 to provide reliable connection and fixation. A trapezoidal column 19 is slidably connected inside the hollow column 13, which controls the radial displacement of the locking ball 18. The outer wall of the trapezoidal column 19 fits against the outer wall of the locking ball 18 to achieve force transmission. A pressing column 14 is fixedly connected to the top of the trapezoidal column 19, which transmits the operating force. A pressing cap 12 is fixedly connected to the top of the pressing column 14, providing an operating interface. A fixed plate 17 is fixedly connected to the inner wall of the hollow column 13, serving as the fixed reference for the spring 16. The pressing column 14 is slidably connected inside the fixed plate 17 to ensure axial movement accuracy. A sliding plate 15 is slidably connected inside the hollow column 13, serving as the movable support for the spring 16. The pressing column 14 is slidably connected inside the sliding plate 15 to maintain coaxiality of movement. A spring 16 is sleeved on the outer wall of the pressing column 14, providing a restoring elastic force. One end of the spring 16 is fixedly connected to the bottom of the sliding plate 15 to ensure uniform force distribution, and the other end of the spring 16 is fixedly connected to the top of the fixed plate 17, forming an elastic support structure.

[0037] Working principle: The motor 2 drives the threaded shaft 4 to rotate. The threaded shaft 4 then engages with the upper pressure plate 3 via a threaded connection, causing the upper pressure plate 3 to slide up and down along the support column 7. This adjusts the distance between the sensor 5 and the contact plate 6 to accommodate membrane switches of different thicknesses. When it is necessary to place or remove the membrane switch, the electric telescopic rod 8 drives the push rod 9 to move horizontally. The push rod 9 pushes the contact plate 6 to slide along the guide rail 10 towards the outside of the device. The contact plate 6 stops at the limit block 11. At this point, the operator can place or remove the membrane switch from outside the device. After the operation is completed, the electric telescopic rod 8 retracts. The contact plate 6 is driven back to the test position along the guide rail 10. When it is necessary to disassemble the sensor 5, the pressing cap 12 is pressed to drive the pressing column 14 to move downward. The pressing column 14 pushes the trapezoidal column 19 to move down inside the hollow column 13. The inclined surface of the trapezoidal column 19 squeezes the retaining ball 18 to make it radially contract and disengage from the sensor 5. At this time, the sensor 5 can be taken out from the bottom of the hollow column 13. When installing, the operation is reversed. The spring 16 pushes the sliding plate 15 and the pressing column 14 to reset. The trapezoidal column 19 moves up to release the pressure on the retaining ball 18. Under the action of radial elastic force, the retaining ball 18 is re-inserted into the sensor 5 to complete the fixation.

[0038] 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 device for testing the resistance value of a membrane switch, comprising a tester (1), characterized in that: The tester (1) is fixedly connected to a motor (2) at the top, and a threaded shaft (4) is fixedly connected to the output end of the motor (2). Multiple support columns (7) are fixedly connected inside the tester (1). An upper pressure plate (3) is slidably connected to the outer wall of the multiple support columns (7). A contact plate (6) is fixedly connected inside the tester (1). A sensor (5) is provided at the bottom of the upper pressure plate (3). The threaded shaft (4) is threadedly connected inside the upper pressure plate (3). A pushing component is provided on the outer wall of the contact plate (6). The pushing component includes a push rod (9) and a guide rail (10). The push rod (9) is fixedly connected to the outer wall of the contact plate (6). The bottom of the guide rail (10) is fixedly connected to the inside of the tester (1). The tester (1) is equipped with a driving component. The contact plate (6) is slidably connected to the top of the guide rail (10). The side wall of the guide rail (10) is fixedly connected to a limit block (11). The upper pressure plate (3) is fixedly connected to a hollow column (13). The hollow column (13) is equipped with a disassembly component.

2. The film switch resistance value testing device according to claim 1, characterized in that: The drive assembly includes an electric telescopic rod (8), and one end of the push rod (9) is fixedly connected to the output end of the electric telescopic rod (8).

3. The film switch resistance value testing device according to claim 1, characterized in that: The disassembly assembly includes a retaining ball (18), which is slidably connected inside the hollow column (13) and engages with the inside of the sensor (5).

4. The film switch resistance value testing device according to claim 3, characterized in that: The hollow column (13) is slidably connected to a trapezoidal column (19), and the outer wall of the trapezoidal column (19) is in contact with the outer wall of the ball (18).

5. The membrane switch resistance value testing device according to claim 4, characterized in that: A pressing column (14) is fixedly connected to the top of the trapezoidal column (19), and a pressing cap (12) is fixedly connected to the top of the pressing column (14).

6. The membrane switch resistance value testing device according to claim 5, wherein: The hollow column (13) is fixedly connected to a fixed plate (17) on its inner wall, and the pressing column (14) is slidably connected inside the fixed plate (17).

7. The thin-film switch resistance value testing device according to claim 6, characterized in that: The hollow column (13) is slidably connected to a sliding disk (15), and the pressing column (14) is slidably connected to the sliding disk (15).

8. The thin-film switch resistance value testing device according to claim 7, characterized in that: A spring (16) is fitted on the outer wall of the pressing column (14). One end of the spring (16) is fixedly connected to the bottom of the sliding disk (15), and the other end of the spring (16) is fixedly connected to the top of the fixed disk (17).

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