Membrane switch service life testing machine for keyboard

Abstract

The utility model discloses a keyboard membrane switch life test machine, a closed cover and a detection platform form a closed test space, a temperature adjusting device and a humidity adjusting device can respectively adjust the temperature and the humidity in the test space, a fixed end of a simulation head feeding device is fixedly installed on the detection platform, and a fixed end of the simulation head feeding device is fixedly installed on the detection platform. The moving end of the simulation head feeding device can move to any position in the testing space, the pressing simulation head is installed at the moving end of the simulation head feeding device, and the simulation head feeding device can send the pressing simulation head to the position over a membrane switch to be tested. The pressing simulation head is provided with contacts directly facing to-be-tested membrane switches under the pressing simulation head in a one-to-one manner, the elastic contacts can repeatedly press the to-be-tested membrane switches at high frequency, and the control system can control the temperature adjusting device, the humidity adjusting device, the pressing simulation head and the simulation head feeding device to start and stop. According to the utility model, the membrane switch can be tested under the condition of simulating real use, the test precision is high, and the test efficiency is high.

Description

Technical Field

[0001] This utility model relates to a notebook keyboard, and more particularly to a life tester for membrane switches used in keyboards. Background Technology

[0002] Laptop keyboards use membrane switches. Before being assembled into a keyboard, these membrane switches undergo lifespan testing to ensure they can maintain stable operation over a long period. Currently, most membrane switch lifespan tests involve repeatedly pressing a fixed point on the switch using a motor-driven sliding lever. This method is inefficient, fails to simulate real-world usage conditions and human keystrokes, and has poor accuracy. Utility Model Content

[0003] To overcome the above shortcomings, this utility model provides a membrane switch life tester for keyboards. This membrane switch life tester can test membrane switches under simulated real-world usage conditions, with high testing accuracy and efficiency.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: a membrane switch life testing machine for keyboards, including a testing platform, a closed cover, a temperature regulating device, a humidity regulating device, a membrane switch positioning device, a pressing simulation head, a simulation head feeding device, and a control system. The closed cover is fixedly installed on the testing platform, and the closed cover and the testing platform can form a closed testing space. The temperature regulating device and the humidity regulating device can respectively adjust the temperature and humidity in the testing space to simulate the actual use environment of the keyboard. The fixed end of the simulation head feeding device is fixedly installed on the testing platform, and the moving end of the simulation head feeding device can move to any position in the testing space. The pressing simulation head is installed on the moving end of the simulation head feeding device, and the simulation head feeding device can send the pressing simulation head directly above the membrane switch to be tested. The pressing simulation head is provided with contacts that are directly opposite the membrane switch to be tested below it. The elastic contacts can repeatedly press the membrane switch to be tested at high frequency. The control system can control the start and stop actions of the temperature regulating device, the humidity regulating device, the pressing simulation head, and the simulation head feeding device.

[0005] As a further improvement of this utility model, the enclosure is provided with a door that can be opened and closed.

[0006] As a further improvement of this utility model, the membrane switch positioning device includes a membrane switch receiving groove on the testing platform, edge pressing blocks located around the membrane switch receiving groove, and an edge pressing drive device. The membrane switch sheet to be tested can be accommodated in the membrane switch receiving groove and its surroundings are limited. The edge pressing blocks are installed around the membrane switch receiving groove and can move up and down. Each edge pressing block descends to press the edges around the membrane switch sheet. The edge pressing drive device drives the edge pressing blocks to move up and down, and the control system controls the start and stop of the edge pressing drive device.

[0007] As a further improvement of this utility model, the detection platform is provided with a feeding slide rail, a feeding tray is provided on the slider that can slide linearly, the membrane switch receiving groove is formed on the feeding strip plate, and a feeding and discharging driving device is also provided, which drives the feeding strip plate to move linearly.

[0008] As a further improvement of this utility model, the pressing simulation head includes an eccentric roller, a pressing cylinder, a pressing slider, an elastic element, and a rotary drive device. The pressing cylinder is installed on the moving end of the simulation head feeding device. The eccentric roller is installed inside the pressing cylinder and can rotate at high speed. An eccentric protrusion is formed on the eccentric roller. The pressing cylinder is provided with a plurality of slides extending radially therein. The slides are arranged at intervals along the pressing cylinder and axially. The pressing slider is installed in the slides and can slide a set distance. One end of the pressing slider is in close contact with the outer circumference of the eccentric roller. The other end of the pressing slider is provided with a contact that can extend a set distance beyond the outer circumference of the pressing cylinder. The elastic element provides elastic force to the pressing slider so that it always keeps in close contact with the outer circumference of the eccentric roller. The rotary drive device drives the pressing roller to rotate at high speed.

[0009] As a further improvement of this utility model, the pressing cylinder is intermittently rotatable and mounted on the moving end of the simulation head feeding device. Several rows of slides are arranged at intervals along the circumference of the pressing cylinder, and the position of each row of slides corresponds to the position of different rows of membrane switches on the membrane switch sheet being tested. A gear ring is also coaxially fixedly mounted on the pressing cylinder. A drive motor and a drive gear are mounted on the moving end of the simulation head feeding device. The drive gear is coaxially fixedly connected to the power output end of the drive motor, and the drive gear meshes with the gear ring for transmission.

[0010] As a further improvement of this utility model, the pressing slider includes an outer tube, an inner rod, and a telescopic drive device. The inner rod is slidably inserted into the outer tube along the axial direction. The telescopic drive device drives the inner rod to slide to change the overall length of the pressing slider, thereby changing the contact extension distance.

[0011] As a further improvement of this utility model, the inner slide of the pressing cylinder is a T-shaped structure with the inner diameter of the eccentric roller end facing downward being larger than the inner diameter of the end away from the eccentric roller. The outer tube is slidably inserted into the end of the slide with the larger inner diameter, and the end face of the outer tube facing away from the eccentric roller is stopped on the inner step surface of the T-shaped structure of the slide. The inner rod is slidably inserted into the end of the slide with the smaller inner diameter.

[0012] As a further improvement of this utility model, the telescopic drive device is an electric actuator.

[0013] As a further improvement of this utility model, the X-axis, Y-axis, and Z-axis are assumed to be perpendicular, with the Z-axis extending vertically. The simulated head feeding device includes an X-axis slide rail, a Y-axis slide rail, and a mounting base. The Y-axis slide rail is mounted on the X-axis slide rail via linear motion. A Y-axis moving plate is mounted on the Y-axis slide rail. An X-axis motor drives the Y-axis slide rail to move on the X-axis slide rail. A Y-axis linear motor drives the Y-axis moving plate to move on the Y-axis slide rail. A Z-axis linear motor is mounted on the Y-axis moving plate. The mounting base is connected to the drive shaft of the Z-axis linear motor. The pressing simulated head is mounted on the mounting base.

[0014] The beneficial technical effects of this utility model are as follows: By setting temperature and humidity control devices, this utility model can fully simulate various working environments of a keyboard. By using a special pressing simulation head to press the membrane switch, it closely resembles the typing actions and usage habits of a real person. It can perform highly simulated automatic testing of membrane switches for keyboards. This utility model is simple to operate, has high testing efficiency, can set various testing conditions, adapts to different products, and provides accurate testing. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present utility model;

[0016] Figure 2 This is a cross-sectional view of the test state of this utility model;

[0017] Figure 3 This is a three-dimensional view of the pressing simulation head of this utility model;

[0018] Figure 4 This is a schematic diagram of the pressing simulation head structure of this utility model. Detailed Implementation

[0019] Example: A life tester for a keyboard membrane switch includes a testing platform 1, a closed cover 2, a temperature regulating device, a humidity regulating device, a membrane switch positioning device, a pressing simulation head 3, a simulation head feeding device, and a control system. The closed cover 2 is fixedly installed on the testing platform 1, forming a closed testing space with the testing platform 1. The temperature regulating device and the humidity regulating device can respectively adjust the temperature and humidity in the testing space to simulate the actual use environment of the keyboard. The fixed end of the simulation head feeding device is fixedly installed on the testing platform 1, and the moving end of the simulation head feeding device can move to any position in the testing space. The pressing simulation head 3 is installed on the moving end of the simulation head feeding device, and the simulation head feeding device can deliver the pressing simulation head 3 directly above the membrane switch to be tested. The pressing simulation head 3 is provided with contacts 22 that are directly opposite the membrane switch to be tested below it. The elastic contacts 22 can repeatedly press the membrane switch to be tested at high frequency. The control system can control the start and stop actions of the temperature regulating device, the humidity regulating device, the pressing simulation head 3, and the simulation head feeding device.

[0020] During testing, the temperature and humidity in the test space are first adjusted as needed using temperature and humidity control devices. Then, the simulated head feed device moves the pressing simulated head 3 onto the membrane switch on the test platform. The pressing simulated head 3 is then activated, causing the contacts 22 on it to extend and retract to press the membrane button. After a certain number of presses, the membrane switch is removed to check if it has lost its function, thus determining whether the membrane switch meets the required number of presses and, consequently, whether the membrane switch's lifespan meets the requirements.

[0021] The enclosure 2 is equipped with a door 4 that can be opened and closed. Opening the door 4 allows the membrane switch to be taken out and put in, eliminating the need to repeatedly install the enclosure 2.

[0022] The membrane switch positioning device includes a membrane switch receiving groove 5 mounted on a testing platform 1, edge-pressing blocks 6 located around the membrane switch receiving groove 5, and an edge-pressing drive device 7. The membrane switch sheet to be tested can be accommodated in the membrane switch receiving groove 5, which limits its surrounding area. The edge-pressing blocks 6 are installed around the membrane switch receiving groove 5 and can move up and down. Each edge-pressing block 6 descends to press the edges of the membrane switch sheet. The edge-pressing drive device 7 drives the edge-pressing blocks 6 to move up and down, and the control system controls the start and stop of the edge-pressing drive device 7. The membrane switch is fixed by limiting the edges of the membrane switch through the membrane switch receiving groove 5 and then pressing the edges of the membrane switch with the edge-pressing blocks 6.

[0023] The detection platform 1 is equipped with a feeding slide rail 8, and a feeding tray 9 that can slide linearly on the slider. The membrane switch receiving groove 5 is formed on the feeding strip plate. It is also equipped with a feeding and discharging drive device. The feeding and discharging drive device drives the feeding strip plate to move linearly, and the feeding and discharging are realized by the feeding tray 9 moving along the feeding slide rail 8.

[0024] The simulated pressing head 3 includes an eccentric roller 10, a pressing cylinder 11, a pressing slider, an elastic element, and a rotary drive device. The pressing cylinder 11 is mounted on the moving end of the simulated head feeding device. The eccentric roller 10 is mounted inside the pressing cylinder 11 and can rotate at high speed. An eccentric protrusion is formed on the eccentric roller 10. The pressing cylinder 11 has several radially extending slides, which are arranged at intervals along the pressing cylinder 11 and axially. The pressing slider is mounted inside the slides and can slide a set distance. One end of the pressing slider is in close contact with the outer circumference of the eccentric roller 10, and the other end of the pressing slider has a contact 22 that can extend a set distance beyond the outer circumference of the pressing cylinder 11. The elastic element provides elastic force to the pressing slider so that it always keeps it in close contact with the outer circumference of the eccentric roller 10. The rotary drive device drives the pressing roller to rotate at high speed. The high-speed rotation of the eccentric roller 10 inside the pressing cylinder 11 causes the bottom row of pressing sliders in the pressing cylinder 11 to produce a high-speed extension and retraction motion, simulating a person striking a keyboard.

[0025] The pressing cylinder 11 is intermittently rotatable and mounted on the moving end of the simulation head feeding device. Several rows of slides are arranged at intervals along the circumference of the pressing cylinder 11, and the position of each row of slides corresponds to the position of different rows of membrane switches on the membrane switch sheet being tested. A gear ring 14 is also coaxially fixedly mounted on the pressing cylinder 11. A drive motor 12 and a drive gear 13 are mounted on the moving end of the simulation head feeding device. The drive gear 13 is coaxially fixedly connected to the power output end of the drive motor 12, and the drive gear 13 meshes with the gear ring 14 for transmission. By rotating the pressing cylinder 11, the different rows of slides on it are aligned with the membrane switches being tested, so that the accurate testing of all membrane switches on the entire sheet can be achieved.

[0026] The pressing slider includes an outer tube 15, an inner rod 16, and a telescopic drive device. The inner rod 16 is slidably inserted into the outer tube 15 along the axial direction. The telescopic drive device drives the inner rod 16 to slide, thereby changing the overall length of the pressing slider and thus changing the extension distance of the contact 22. By extending and retracting the inner rod 16 within the outer tube 15, the extension distance of the contact 22 is adjusted, thereby adjusting the pressing force and distance on the membrane switch.

[0027] The inner slide of the pressing cylinder 11 is a T-shaped structure with the inner diameter of the downward-facing eccentric roller 10 being larger than the inner diameter of the end away from the eccentric roller 10. The outer tube 15 is slidably inserted into the end of the slide with the larger inner diameter, and the end face of the outer tube 15 facing away from the eccentric roller 10 is stopped on the inner step surface of the T-shaped structure of the slide. The inner rod 16 is slidably inserted into the end of the slide with the smaller inner diameter.

[0028] The telescopic drive device is an electric actuator.

[0029] Assuming the X, Y, and Z axes are perpendicular, with the Z axis extending vertically, the simulated head feeding device includes an X-axis slide rail 17, a Y-axis slide rail 18, and a mounting base 20. The Y-axis slide rail 18 is linearly mounted on the X-axis slide rail 17. A Y-axis moving plate 19 is mounted on the Y-axis slide rail 18. An X-axis motor drives the Y-axis slide rail 18 to move on the X-axis slide rail 17, and a Y-axis linear motor drives the Y-axis moving plate 19 to move on the Y-axis slide rail 18. A Z-axis linear motor 21 is mounted on the Y-axis moving plate 19. The mounting base 20 is connected to the drive shaft of the Z-axis linear motor 21. The pressing simulated head 3 is mounted on the mounting base 20. The above mechanism realizes the feeding movement of the pressing simulated head 3 in the front-back, left-right, up-down directions, achieving comprehensive detection of the membrane switch and obstacle avoidance during loading and unloading.

Claims

1. A membrane switch life test machine for keyboards, characterized by: The utility model relates to a keyboard membrane switch testing device, including detection platform (1), enclosed cover (2), temperature regulation device, humidity regulation device, membrane switch positioning device, press simulation head (3), simulation head feeding device and control system, enclosed cover is fixedly installed on the detection platform, and enclosed cover can form enclosed test space with the detection platform, and temperature regulation device and humidity regulation device can adjust temperature and humidity in test space respectively to simulate keyboard actual use environment, the fixed end of simulation head feeding device is fixedly installed on the detection platform, and the moving end of simulation head feeding device can move to any position in test space, press simulation head is installed on the moving end of simulation head feeding device, and simulation head feeding device can send press simulation head to the membrane switch just above waiting test, the press simulation head is equipped with the contact (22) opposite with the membrane switch just below waiting test, and elastic contact can repeatedly press the membrane switch under test at high frequency, and control system can control temperature regulation device, humidity regulation device, press simulation head and simulation head feeding device start -stop action.

2. The membrane switch life tester for keyboards according to claim 1, characterized in that: The enclosed cover is equipped with a door (4) that can be opened and closed.

3. The membrane switch life testing machine for keyboards according to claim 1, characterized in that: The membrane switch positioning device includes a membrane switch containing groove (5) on the detection platform, a pressing block (6) around the membrane switch containing groove, and a pressing block driving device (7). The membrane switch sheet to be tested can be contained in the membrane switch containing groove to limit its periphery. The pressing block can be installed around the membrane switch containing groove and can move up and down. The lowering of each pressing block can press the edges around the membrane switch sheet. The pressing block driving device drives the pressing block to move up and down. The control system controls the pressing block driving device to start and stop working.

4. The membrane switch life testing machine for keyboards according to claim 3, characterized in that: The detection platform is equipped with a feeding slide rail (8). The feeding slide rail is equipped with a feeding support plate (9) that can slide linearly. The membrane switch containing groove is formed on the feeding support plate. The detection platform is also equipped with an in-out feeding driving device. The in-out feeding driving device drives the feeding support plate to move linearly.

5. The membrane switch life testing machine for keyboards according to claim 1, characterized in that: The press simulation head includes an eccentric roller (10), a press cylinder (11), a press sliding block, an elastic member, and a rotary driving device. The press cylinder is installed on the moving end of the simulation head feeding device. The eccentric roller can rotate at high speed and is installed in the press cylinder. The eccentric roller has an eccentric convex surface. The press cylinder has a plurality of slide ways extending along its radial direction. The slide ways are arranged along the press cylinder and the axial direction. The press sliding block is installed in the slide way and can slide a certain distance. One end of the press sliding block tightly contacts the outer lateral surface of the eccentric roller. The other end of the press sliding block is equipped with a contact that can extend out of the outer lateral surface of the press cylinder by a certain distance. The elastic member provides elastic force to the press sliding block so that it always tightly contacts the outer lateral surface of the eccentric roller. The rotary driving device drives the press roller to rotate at high speed.

6. The membrane switch life testing machine for keyboards according to claim 5, characterized in that: The pressing cylinder is intermittently rotatable and mounted on the moving end of the simulation head feeding device, a plurality of rows of slides are arranged along the circumferential direction of the pressing cylinder, the positions of the slides correspond to the positions of different rows of membrane switches on the measured membrane switch sheet, a gear ring (14) is coaxially and fixedly mounted on the pressing cylinder, a driving motor (12) and a driving gear (13) are mounted on the moving end of the simulation head feeding device, the driving gear is coaxially and fixedly connected to the power output end of the driving motor, and the driving gear is in meshing transmission with the gear ring.

7. The membrane switch life testing machine for keyboards according to claim 5, characterized in that: The pressing slider comprises an outer tube (15), an inner rod (16) and a telescopic driving device, the inner rod is slidably inserted into the outer tube, the telescopic driving device drives the inner rod to slide to change the overall length of the pressing slider, thereby changing the contact extension distance.

8. The membrane switch life testing machine for keyboards according to claim 7, characterized in that: The slide in the pressing cylinder is a T-shaped structure with the inner diameter of one end of the eccentric roller being larger than the inner diameter of the other end, the outer tube is slidably inserted into the end with the larger inner diameter, and the end face of the outer tube away from the eccentric roller is stopped on the inner step surface of the T-shaped structure, and the inner rod is slidably inserted into the end with the smaller inner diameter.

9. The membrane switch life testing machine for keyboards of claim 7, characterized by: The telescopic driving device is an electric push rod.

10. The membrane switch life tester for keyboards according to claim 1, characterized in that X axis, Y axis and Z axis are perpendicular, and the Z axis extends along the vertical direction, the simulation head feeding device comprises an X-axis sliding rail (17), a Y-axis sliding rail (18) and a mounting seat (20), the Y-axis sliding rail is linearly mounted on the X-axis sliding rail, a Y-axis moving plate (19) is mounted on the Y-axis sliding rail, an X-axis motor drives the Y-axis sliding rail to move on the X-axis sliding rail, a Y-axis linear motor drives the Y-axis moving plate to move on the Y-axis sliding rail, a Z-axis linear motor (21) is mounted on the Y-axis moving plate, and the mounting seat is connected with the driving shaft of the Z-axis linear motor, and the pressing simulation head is mounted on the mounting seat.

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