A keyboard key durability testing machine

Abstract

This invention relates to the field of keyboard key testing technology, specifically a keyboard key durability testing machine, comprising a main body of the testing machine and a test head fixed to its output end. A support is provided inside the main body of the testing machine, with a front plate and a rear plate fixed to the top of the support. A clamping plate is provided on one side of the front plate. Both ends of the support plate are provided with height adjustment parts, and each height adjustment part has an inclined rod on one side. A transmission rod is connected to the bottom of the two height adjustment parts. Under the thrust of an elastic element, a sliding plate pushes the inclined rod to contact the keyboard surface. The sliding plate drives two driving wheels to rotate in opposite directions via a toothed plate. Depending on the keyboard's tilt, when the sliding plate displacement distance is the same, the two driving wheels cause the surrounding wheel to rotate, while the output wheel remains stationary. When the sliding plate displacement distances are different, the two driving wheels cause the surrounding wheel to rotate while simultaneously revolving, driving the output wheel to rotate. The output wheel, through the transmission rod, causes the support to rotate, and the support drives the keyboard to rotate, making the keyboard surface parallel to the support surface.

Description

Technical Field

[0001] This invention relates to the field of keyboard key testing technology, and more specifically to a keyboard key durability testing machine. Background Technology

[0002] Keyboard key durability testing machines are indispensable professional automated equipment in keyboard R&D, production, and quality inspection. Their core function is to simulate daily user pressing operations, performing repeated and continuous pressing tests on keyboard keys to evaluate their reliability and stability after long-term, high-frequency use. This equipment can precisely set parameters such as pressing force, pressing frequency, and number of presses, adapting to the testing needs of different types of products, including mechanical keyboards and membrane keyboards. It can support up to tens of millions of presses, closely matching the actual usage intensity in various scenarios. It can monitor the functional integrity of keys in real time, including signal trigger stability, rebound smoothness, and contact resistance changes, promptly capturing failure phenomena such as key jamming, collapse, and signal loss, and recording the number of presses and failure mode at the time of failure. Its functions are multifaceted, helping manufacturers expose design flaws in key structure and material selection during the R&D stage, providing quantitative data support for switch optimization and keycap improvement. It can also perform sampling inspection during production to screen for defective products and prevent substandard products from entering the market. Meanwhile, the equipment can conduct tests according to relevant international and domestic standards such as ISO and GB / T, ensuring that products meet industry specifications and corporate quality commitments. It also provides reliable durability data support for product marketing, showcasing product quality. Furthermore, the data collected during testing can be used for failure analysis and product iteration, helping companies reduce after-sales costs, enhance product competitiveness, and ensure a superior user experience over long-term use.

[0003] Existing keyboard key durability testing machines typically only allow the test head to perform reciprocating strikes along a direction perpendicular to the support surface during key testing. This operating mode is only suitable for the basic testing needs of flat-panel keyboards. Most mainstream keyboards on the market today feature a tilted design on the top panel, with the keyboard key mounting axis perpendicular to the tilted top surface. However, there is a fixed angle between the tilted top surface and the bottom support plane. This structural difference directly causes the original test trajectory of the testing machine to fail to match the actual force direction of the keys. The test head cannot perform precise pressing along the vertical axis of the keys, causing not only a shift in the key's force point and an inability to simulate the force state under real-world usage scenarios, but also distorting the durability test data and making it difficult to accurately reflect the actual durability performance of the keys. This compatibility defect can also lead to problems such as the test head hitting the edge of the key and abnormal wear on one side of the key, reducing the reliability and reference value of the test results and failing to meet the high-precision durability testing requirements of tilted panel keyboards, thus limiting the accuracy and versatility of keyboard key quality testing.

[0004] Therefore, the present invention provides a keyboard key durability testing machine that can automatically adjust the tilt angle to ensure testing accuracy. Summary of the Invention

[0005] To address the problems in existing testing machines, such as the inability of the test head to press the keys vertically and the distortion of test data caused by the tilted placement of the keyboard, a new keyboard key durability testing machine was designed.

[0006] The technical solution adopted by this invention to solve its technical problem is as follows: a keyboard key durability testing machine, comprising a testing machine body and a testing head fixed to its output end. A support is provided inside the testing machine body, with a front plate and a rear plate fixed to the top of the support. A clamping plate is provided on one side of the front plate. Height adjustment parts are provided at both ends of the support plate, and an inclined rod is provided on one side of each height adjustment part. A transmission rod is driven to the bottom of the two height adjustment parts, and both ends of the transmission rod are driven to the two ends of the support. The height adjustment part includes a bracket slidably connected to the inner side of the support, and a sliding plate slidably connected to the inner side of the bracket. A toothed plate is fixed to the bottom of each sliding plate. Both toothed plates are connected to drive wheels on their adjacent sides. Both drive wheels are meshed with a ring wheel on their outer side. An output wheel is located on the outer side of the ring wheel. Under the thrust of the elastic element three, the slide pushes the tilt rod to contact the keyboard surface. The slide drives the two drive wheels to rotate in opposite directions through the toothed plates. Depending on the keyboard tilt, when the slide displacement distance is the same, the two drive wheels cause the ring wheel to rotate while the output wheel remains stationary. When the slide displacement distance is different, the two drive wheels cause the ring wheel to rotate while simultaneously revolving around the clock, driving the output wheel to rotate. The output wheel causes the support to rotate through the transmission rod. The support drives the keyboard to rotate so that the keyboard surface is parallel to the support surface.

[0007] Furthermore, the support is slidably connected to the inside of the test machine body via a connecting component, and the support is located at the bottom of the test head.

[0008] Furthermore, a base is fixed to the top of the support, and a knob is threadedly connected to the inner side of the front plate. The end of the knob near the rear plate is rotatably connected to the clamping plate. Rotating the knob can drive the clamping plate to move between the front and rear plates to clamp or release the keyboard. An elastic element is fixed to the side of the two supports that are close to each other. The other end of the elastic element is fixedly connected to the support. Each elastic element is in a stretched state. Two limiting plates are fixed to the side of the clamping plate that is close to the rear plate, and mating plates are fixed to the side of the two supports that are close to each other.

[0009] Furthermore, each support has an elastic element three fixed to the top of its bottom wall. The top of the elastic element three is fixedly connected to the top of the slide plate. Each elastic element three is in a stretched state. The toothed plate is slidably engaged with the inside of the support. The two slide plates on the same end of the support plate are rotatably connected to a connecting rod on their adjacent sides. A reset frame is fixed to the top of the base, and the connecting rod is located on the top of the reset frame.

[0010] Furthermore, elastic element 2 is fixed to the inner side of both supports, and a locking block is fixed to the other end of elastic element 2. The locking block slides and engages with the inner side of the support. The locking block compresses elastic element 2 to release the restriction on the toothed plate, allowing the toothed plate to move inside the support. The bottom of each bracket is rotatably connected to two sets of spur gears 1 through connecting components. Each set of spur gears 1 consists of two meshing transmission gears. The two sets of spur gears transmit the force of the toothed plate to the driving wheel, causing the driving wheel to rotate.

[0011] Furthermore, a protective shell is fixed to the bottom of the support, the output wheel is rotatably connected to the inside of the protective shell, the surrounding wheel is rotatably connected to the inside of the output wheel, and the two driving wheels are rotatably connected to the inside of the protective shell. The two driving wheels and the output wheel are coaxial, and the axes of the three surrounding wheels are perpendicular to the axis of the driving wheel.

[0012] Furthermore, the transmission rod is rotatably connected to the bottom of the support via a connecting component, and a driven wheel is slidably engaged on the outer side of the transmission rod. The driven wheel is rotatably connected to the inner side of the protective shell, and the driven wheel meshes with the output wheel.

[0013] Furthermore, a set of meshing bevel gears is fixed at both ends of the transmission rod. Each bevel gear set is connected to a second spur gear set at its top. Each second spur gear set consists of two meshing transmission gears. A self-locking transmission component is fixed at the output end of each second spur gear set.

[0014] Furthermore, the self-locking transmission component includes a worm fixed to the inner side of the output end of the spur gear set and a worm wheel rotatably connected to the inner side of the support. The worm wheel and the worm mesh, the worm is rotatably connected to the inner side of the support, the worm wheel and the worm have self-locking capability, and a rotating shaft is fixed to the inner side of the worm wheel, and the rotating shaft is fixedly connected to the support.

[0015] The beneficial effects of this invention are:

[0016] (1) The keyboard key durability testing machine of the present invention can accurately identify the tilt state of the upper surface of the keyboard through the coordinated cooperation of the height difference leveling part, the inclined rod, the slide plate, the toothed plate and the gear set. The angle calibration can be completed without manual intervention. When the upper surface of the keyboard is tilted, the two inclined rods will generate a sliding plate displacement difference after contacting the keyboard. Due to the difference in driving force on both sides, the surrounding wheel rotates and revolves at the same time, thereby driving the output wheel, the transmission rod and the worm gear structure to rotate, driving the support to rotate until the keyboard surface is parallel to the support surface, ensuring that the test head is always perpendicular to the keyboard key surface to apply pressure. This automatic leveling design not only avoids the tedious operation of manual adjustment and reduces human error, but also adapts to keyboard testing in different placement states, greatly improving the accuracy and reliability of test data.

[0017] (2) The keyboard key durability testing machine of the present invention uses a front plate, a rear plate, a clamping plate and a knob. Rotating the knob drives the clamping plate to move, which can clamp and release keyboards of different widths. The operation is convenient and the clamping force can be flexibly adjusted. At the same time, the elastic element, the limiting plate and the mating plate work together to automatically complete the centering calibration of the keyboard during clamping. The limiting plate releases the restriction on the mating plate. Under the contraction force of the elastic element, the bracket pushes the keyboard to the center of the base, ensuring that the keyboard position is consistent during the test and avoiding positional deviation from affecting the results. In addition, the clamping plate and the bracket are equipped with ball bearings to reduce wear on the keyboard surface, ensure fit and improve clamping stability. This design does not require changing the clamps, reduces the testing cost, improves versatility and practicality, can be adapted to various keyboards, meets diverse testing needs, and provides a stable foundation for subsequent testing with precise positioning, ensuring the continuity and consistency of the test. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the support of the present invention;

[0021] Figure 3 This is a schematic diagram of the cross-sectional structure of the support of the present invention. Figure 1 ;

[0022] Figure 4 for Figure 3 Enlarged view of point A;

[0023] Figure 5 This is a schematic diagram of the cross-sectional structure of the support of the present invention. Figure 2 ;

[0024] Figure 6 for Figure 5 Enlarged view of point B;

[0025] Figure 7 This is a schematic diagram of the three-dimensional structure of the clamping plate of the present invention;

[0026] Figure 8 This is a schematic diagram of the cross-sectional structure of the support of the present invention. Figure 3 ;

[0027] Figure 9 This is a schematic diagram of the three-dimensional structure of the support frame of the present invention;

[0028] Figure 10 This is a schematic diagram of the cross-sectional structure of the bracket of the present invention;

[0029] Figure 11 This is a schematic diagram of the cross-sectional structure of the transmission rod of the present invention;

[0030] Figure 12 for Figure 11 Enlarged view of point C;

[0031] Figure 13 This is a three-dimensional structural diagram of the height difference leveling part of the present invention;

[0032] Figure 14 This is a schematic diagram of the three-dimensional structure of the toothed plate of the present invention;

[0033] Figure 15 This is a schematic diagram of the three-dimensional structure of the card block of the present invention.

[0034] In the diagram: 1. Main body of the testing machine; 2. Test head; 3. Support; 4. Base; 41. Front plate; 42. Rear plate; 5. Clamping plate; 51. Knob; 52. Limiting plate; 6. Height difference leveling part; 61. Bracket; 611. Elastic component one; 612. Mating plate; 62. Slide plate; 621. Elastic component three; 63. Connecting rod; 631. Reset frame; 64. Protective shell; 65. Gear plate; 66. Spur gear set one; 67. Driving wheel; 68. Circulating wheel; 69. Output wheel; 7. Transmission rod; 71. Driven wheel; 72. Bevel gear set; 73. Spur gear set two; 8. Inclined rod; 9. Self-locking transmission component; 91. Worm gear; 92. Worm wheel; 10. Rotating shaft; 11. Locking block; 12. Elastic component two. Detailed Implementation

[0035] To make the technical means, technical features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0036] Example: Figures 1-15 As shown, the keyboard key durability testing machine of the present invention includes a testing machine body 1 and a testing head 2 fixed to its output end. A support 3 is provided inside the testing machine body 1. The support 3 is slidably connected to the inside of the testing machine body 1 through a connecting component, and the support 3 is located at the bottom of the testing head 2.

[0037] In this embodiment, as Figure 1 As shown, before using this device, the operator needs to connect the main body 1 of the test machine to the power supply using a connecting cable, and then set the parameters of the main body 1 of the test machine according to the actual needs. The main body 1 of the test machine controls the test head 2 to move to the designated position. Then, the test keyboard is placed on the top of the base 4. After clamping the keyboard, the main body 1 of the test machine controls the test head 2 to reciprocate in the vertical direction. The keyboard keys are used for durability testing.

[0038] Specifically, a front plate 41 and a rear plate 42 are fixed to the top of the support 3. A clamping plate 5 is provided on one side of the front plate 41. A height difference leveling part 6 is provided at both ends of the support plate. An inclined rod 8 is provided on one side of each height difference leveling part 6. A transmission rod 7 is driven to the bottom of the two height difference leveling parts 6. The two ends of the transmission rod 7 are driven to the two ends of the support 3. The height difference leveling part 6 includes a bracket 61 slidably connected to the inner side of the support 3. A sliding plate 62 is slidably connected to the inner side of the bracket 61. A toothed plate 65 is fixed to the bottom of each sliding plate 62. A drive wheel 67 is driven to the side of each toothed plate 65 that is close to each other. A meshing connection is made to the outer sides of each drive wheel 67. A surround wheel 68 is provided, and an output wheel 69 is provided on the outer side of the surround wheel 68. Under the thrust of the elastic element 621, the slide plate 62 pushes the inclined rod 8 to contact the keyboard surface. The slide plate 62 drives the two driving wheels 67 to rotate in opposite directions through the toothed plate 65. Depending on the different inclination of the keyboard, when the displacement distance of the slide plate 62 is the same, the two driving wheels 67 cause the surround wheel 68 to rotate and the output wheel 69 to remain stationary. When the displacement distance of the slide plate 62 is different, the two driving wheels 67 cause the surround wheel 68 to rotate and revolve, driving the output wheel 69 to rotate. The output wheel 69 causes the support 3 to rotate through the transmission rod 7. The support 3 drives the keyboard to rotate so that the keyboard surface is parallel to the surface of the support 3.

[0039] In this embodiment, if the upper surface of the keyboard is tilted, the displacement difference of the slide plate 62 after the two inclined rods 8 contact the keyboard is not zero. The two toothed plates 65 drive the two driving wheels 67 to rotate synchronously through the two spur gear sets 66. Since the initial forces on the two driving wheels 67 are the same but the rotation angles of the two driving wheels 67 are the same, the surrounding wheel 68 is subjected to two forces of different magnitudes. At this time, the surrounding wheel 68 rotates on its own axis while revolving around the center, thereby driving the output wheel 69 to rotate. The output wheel 69 drives the transmission rod 7 to rotate through the driven wheel 71. The transmission rod 7 rotates through the bevel gear set 72 and the second spur gear set. Power is transmitted to the worm gear 91, which drives the turbine to rotate the support 3 until the keyboard surface is parallel to the support 3 surface. This automatically adjusts the keyboard tilt angle, allowing the test head 2 to test the keys perpendicular to the keyboard surface. The automatic leveling design not only avoids the tedious manual adjustment and reduces human error, but also adapts to keyboard testing in different orientations, significantly improving the accuracy and reliability of test data. Furthermore, the entire leveling process is automatically completed by the mechanical structure, offering rapid response and high adjustment precision. It requires no additional power source, relying solely on the force of elastic elements and the transmission of gears, reducing energy consumption and improving stability and lifespan. This makes it suitable for large-scale, high-volume keyboard durability testing, effectively improving testing efficiency.

[0040] Staff can also change the parameters of each gear according to actual needs to make the keyboard surface and the support 3 surface at a fixed angle, thereby meeting different testing requirements.

[0041] Specifically, a base 4 is fixed to the top of the support 3, and a knob 51 is threadedly connected to the inner side of the front plate 41. The end of the knob 51 near the rear plate 42 is rotatably connected to the clamping plate 5. Rotating the knob 51 can drive the clamping plate 5 to move between the front plate 41 and the rear plate 42 to clamp or release the keyboard. An elastic element 611 is fixed to the side of the two brackets 61 that are close to each other. The elastic element 611 can be set as a high elasticity and high wear-resistant alloy spring. The other end of the elastic element 611 is fixedly connected to the support 3. Each elastic element 611 is in a stretched state. Two limiting plates 52 are fixed to the side of the clamping plate 5 that is close to the rear plate 42, and a mating plate 612 is fixed to the side of the two brackets 61 that are close to each other.

[0042] In this embodiment, the operator places the test keyboard on top of the base 4, ensuring that the side of the test keyboard closest to the rear plate 42 is in contact with the two ball bearings rotatably connected to the inner side of the rear plate 42. Then, the operator rotates the knob 51 clockwise. The knob 51, through its engagement with the front plate 41, moves the clamping plate 5 towards the side closest to the rear plate 42, clamping the keyboard under test. During this process, the clamping plate 5 simultaneously moves the limiting plate 52 towards the side closest to the rear plate 42. When the ball bearings on the side of the clamping plate 5 closest to the rear plate 42 contact the keyboard under test, the limiting plate 52 completely releases its restriction on the mating plate 612. Under the contraction force of the elastic element 611, the two supports 61 move the slide plate 62 and the inclined rod 8 towards the side of the keyboard under test. After the two supports 61 contact the keyboard under test, they push the keyboard under test to the center of the base 4 to complete the calibration, thus adapting it to keyboards of different sizes. The keyboard clamping and positioning system, with the cooperation of the front plate 41, rear plate 42, clamping plate 5, and knob 51, allows for the clamping and releasing of keyboards of different widths by rotating the knob 51, enabling convenient operation and flexible adjustment of clamping force. Simultaneously, the coordinated action of the elastic element 611, the limiting plate 52, and the mating plate 612 automatically centers the keyboard during clamping. When the clamping plate 5 clamps the keyboard, the limiting plate 52 releases its restriction on the mating plate 612, and the bracket 61, under the contraction force of the elastic element 611, pushes the keyboard to the center of the base 4, ensuring consistent keyboard position during each test and preventing positional deviations from affecting test results. Furthermore, ball bearings are installed on both the clamping plate 5 and the bracket 61, reducing wear on the keyboard surface during clamping and ensuring a good fit between the keyboard and the clamping structure, further enhancing clamping stability. This design eliminates the need to change fixtures based on keyboard size, reducing testing costs and improving the versatility and practicality of the equipment. It can be widely adapted to various sizes and models of keyboards for home, office, and gaming use, meeting diverse testing needs. At the same time, the precise positioning provides a stable foundation for subsequent tilt angle adjustments and durability testing, ensuring the continuity and consistency of the testing process.

[0043] When the operator reverses knob 51, clamp 5 moves away from rear plate 42, releasing its grip on the keyboard. During this process, limit plate 52 re-imposes restraint on mating plate 612. Limit plate 52 and mating plate 612 gradually reset through inclined engagement, and inclined rod 8 also disengages from the keyboard. In this process, connecting rod 63 returns to its original position under the guidance of reset frame 631, causing toothed plate 65 to release its restraint on locking block 11 and reset locking block 11. This design ensures that the keyboard can be quickly and easily removed after testing, while avoiding the risk of keyboard displacement or damage due to sudden loss of clamping force. In addition, the reverse operation of knob 51 is simple and intuitive, allowing operators to replace the keyboard without additional tools, significantly improving testing efficiency, especially suitable for scenarios that require frequent replacement of test samples.

[0044] Specifically, each bracket 61 has an elastic element 621 fixed to the top of its bottom wall. The top of the elastic element 621 is fixedly connected to the top of the slide plate 62. Each elastic element 621 is in a stretched state. The toothed plate 65 is slidably engaged with the inside of the bracket 61. The two slide plates 62 on the same end of the bracket are rotatably connected to a connecting rod 63 on their adjacent sides. The top of the base 4 is fixed with a reset frame 631, and the connecting rod 63 is located on top of the reset frame 631.

[0045] In this embodiment, the elastic element 621 can be set as a highly elastic and wear-resistant alloy spring. Under the action of the elastic element 621, the slide plate 62 moves along the inner side of the bracket 61 towards the side closer to the base 4. The slide plate 62 drives the inclined rod 8 to move towards the base 4. During this process, the tension state of the elastic element 621 ensures that the slide plate 62 can stably push the inclined rod 8 to make close contact with the keyboard surface. At the same time, the design of the connecting rod 63 and the reset frame 631 ensures the smoothness of the movement of the slide plate 62 and avoids adjustment deviation caused by external force interference.

[0046] Specifically, elastic element 2 12 is fixed to the inner side of both supports 3, and a locking block 11 is fixed to the other end of the elastic element 2 12. The locking block 11 is slidably engaged with the inner side of the support 3. The locking block 11 compresses the elastic element 2 12 to release the restriction on the toothed plate 65, allowing the toothed plate 65 to move inside the support 3. The bottom of each bracket 61 is rotatably connected to two sets of spur gear sets 1 66 through connecting parts. Each set of spur gear sets 1 66 consists of two meshing transmission gears. The two sets of spur gear sets transmit the force of the toothed plate 65 to the driving wheel 67, causing the driving wheel 67 to rotate.

[0047] In this embodiment, when the card block 11 contacts the side wall of the keyboard to be tested, the card block 11 is compressed and the elastic element 2 12 moves into the inside of the bracket 61. When the bracket 61 contacts the keyboard to be tested, the card block 11 moves completely into the inside of the bracket 61 and releases the restriction on the toothed plate 65.

[0048] Specifically, a protective shell 64 is fixed to the bottom of the support 3. The output wheel 69 is rotatably connected to the inner side of the protective shell 64. The surrounding wheel 68 is rotatably connected to the inner side of the output wheel 69. Two driving wheels 67 are rotatably connected to the inner side of the protective shell 64. The two driving wheels 67 and the output wheel 69 are coaxial. The axes of the three surrounding wheels 68 are perpendicular to the axes of the driving wheels 67. The transmission rod 7 is rotatably connected to the bottom of the support 3 through a connecting component. A driven wheel 71 is slidably engaged on the outer side of the transmission rod 7. The driven wheel 71 is rotatably connected to the inner side of the protective shell 64, and the driven wheel 71 and the output wheel 69 are engaged.

[0049] In this embodiment, if the upper surface of the keyboard is not tilted, the displacement difference of the slide plate 62 after the two inclined rods 8 contact the keyboard is zero. The two toothed plates 65 drive the two driving wheels 67 to rotate synchronously through the two spur gear sets 66. Since the two driving wheels 67 are subjected to the same force and the two driving wheels 67 rotate at the same angle, the surrounding wheel 68 is subjected to two forces of the same magnitude. Therefore, the surrounding wheel 68 only rotates on its own axis and does not revolve around the center. At this time, the output wheel 69 remains stationary, the transmission rod 7 does not drive the support 3 to rotate, and the angle between the keyboard surface and the support 3 surface remains unchanged. In addition, the protective shell 64 effectively protects the internal gear set and transmission structure, preventing dust or foreign objects from entering and affecting the operating accuracy of the equipment.

[0050] Specifically, both ends of the transmission rod 7 are fixed with a set of meshing bevel gears 72. The top of each bevel gear set 72 is connected to a second spur gear set 73. Each second spur gear set 73 consists of two meshing transmission gears. The output end of each second spur gear set 73 is fixed with a self-locking transmission component 9. The self-locking transmission component 9 includes a worm 91 fixed to the inner side of the output end of the second spur gear set 73 and a worm wheel 92 rotatably connected to the inner side of the support 3. The worm wheel 92 and the worm 91 mesh. The worm 91 is rotatably connected to the inner side of the support 3. The worm wheel 92 and the worm 91 have self-locking capability. A rotating shaft 10 is fixed to the inner side of the worm wheel 92. The rotating shaft 10 is fixedly connected to the support 3.

[0051] Specifically, after the keyboard adjustment is completed, the main body 1 of the testing machine controls the testing head 2 to reciprocate vertically, applying pressure to the keyboard keys and recording the durability data of the keys. During the test, the cooperation between the clamping plate 5 and the bracket 61 ensures that the keyboard remains stable, preventing positional displacement due to external forces. Simultaneously, the worm gear 92 and worm 91 structure in the self-locking transmission component 9 further enhance the stability of the support 3 after angle adjustment through their self-locking characteristics, preventing angle changes due to vibration during the test.

[0052] Working principle: Initial state as follows Figures 1-15 As shown, the staff places the test keyboard on top of the base 4 and makes the side of the test keyboard near the back plate 42 fit with the two ball bearings rotatably connected to the inside of the back plate 42. Then, the knob 51 is turned clockwise to clamp the keyboard under test. Under the contraction force of the elastic element 611, the two brackets 61 push the keyboard under test to the center of the base 4 to complete the calibration.

[0053] When the bracket 61 contacts the keyboard to be tested, the locking block 11 moves completely into the inside of the bracket 61 to release the restriction on the toothed plate 65. Under the action of the elastic element 621, the sliding plate 62 moves along the inside of the bracket 61 towards the side closer to the base 4. The sliding plate 62 drives the inclined rod 8 to move towards the base 4.

[0054] If the upper surface of the keyboard is not tilted, the displacement difference of the slide plate 62 is zero after the two inclined rods 8 come into contact with the keyboard. The two toothed plates 65 drive the two drive wheels 67 to rotate synchronously through the two spur gear sets 66. The surrounding wheel 68 only rotates on its own axis and does not revolve around the center. At this time, the output wheel 69 remains stationary, and the angle between the keyboard surface and the support 3 surface remains unchanged.

[0055] If the keyboard surface is tilted, the displacement difference of the slide plate 62 after the two tilt rods 8 contact the keyboard will not be zero. At this time, the orbital wheel 68 will rotate while rotating on its own axis, thereby driving the output wheel 69 to rotate. The output wheel 69 drives the transmission rod 7 to rotate through the driven wheel 71. The transmission rod 7 transmits power to the worm gear 91 through the bevel gear set 72 and the spur gear set 73. The worm gear 91 drives the turbine to rotate the support 3 until the keyboard surface is parallel to the surface of the support 3, thus completing the automatic adjustment of the keyboard tilt angle. As a result, the test head 2 can be perpendicular to the keyboard surface to test the keys.

[0056] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A keyboard key durability testing machine, comprising a testing machine body and a testing head fixed to its output end, characterized in that: The main body of the testing machine is equipped with a support. A front plate and a rear plate are fixed on the top of the support. A clamping plate is provided on one side of the front plate. Both ends of the support plate are equipped with height difference leveling parts. Each height difference leveling part is equipped with an inclined rod on one side. The bottom of the two height difference leveling parts is connected to a transmission rod. The two ends of the transmission rod are connected to the two ends of the support. The height adjustment unit includes a bracket slidably connected to the inner side of the support. A slide plate is slidably connected to the inner side of the bracket. A toothed plate is fixed to the bottom of each slide plate. A drive wheel is driven to the side of each toothed plate that is close to each other. A circular wheel is meshed to the outer side of each of the two drive wheels. An output wheel is set on the outer side of the circular wheel. The slide plate drives the two drive wheels to rotate in opposite directions through the toothed plates. Depending on the tilt of the keyboard, when the displacement distance of the slide plate is the same, the two drive wheels cause the circular wheel to rotate while the output wheel remains stationary. When the displacement distance of the slide plate is different, the two drive wheels cause the circular wheel to rotate while simultaneously revolving around the axis of rotation, driving the output wheel to rotate. The output wheel causes the support to rotate through a transmission rod to level the keyboard.

2. The keyboard key durability testing machine according to claim 1, characterized in that: The support is slidably connected to the inside of the test machine body through a connecting component, and the support is located at the bottom of the test head.

3. The keyboard key durability testing machine according to claim 1, characterized in that: The top of the support is fixed with a base. The inner side of the front plate is connected to a knob by a thread. The end of the knob near the rear plate is rotatably connected to the clamping plate. Rotating the knob can drive the clamping plate to move between the front and rear plates to clamp or release the keyboard. On the side of the two supports that are close to each other, there is an elastic element. The other end of the elastic element is fixedly connected to the support. Each elastic element is in a stretched state. On the side of the clamping plate that is close to the rear plate, there are two limiting plates. On the side of the two supports that are close to each other, there are mating plates.

4. The keyboard key durability testing machine according to claim 3, characterized in that: Each of the brackets has an elastic element three fixed to the top of its bottom wall. The top of the elastic element three is fixedly connected to the top of the slide plate. Each elastic element three is in a stretched state. The toothed plate is slidably engaged with the inside of the bracket. The two slide plates at the same end of the bracket are rotatably connected to a connecting rod on their adjacent sides. A reset frame is fixed to the top of the base, and the connecting rod is located on the top of the reset frame.

5. The keyboard key durability testing machine according to claim 3, characterized in that: Both supports have an elastic element two fixed to their inner sides, and a locking block is fixed to the other end of the elastic element two. The locking block slides and engages with the inner side of the support. The locking block compresses the elastic element two to release the restriction on the toothed plate, allowing the toothed plate to move inside the support. The bottom of each bracket is rotatably connected to two sets of spur gears one through a connecting component. Each set of spur gears one consists of two meshing transmission gears. The two sets of spur gears one transmit the force of the toothed plate to the driving wheel to make the driving wheel rotate.

6. The keyboard key durability testing machine according to claim 1, characterized in that: The bottom of the support is fixed with a protective shell. The output wheel is rotatably connected to the inside of the protective shell. The surrounding wheel is rotatably connected to the inside of the output wheel. The two driving wheels are rotatably connected to the inside of the protective shell. The two driving wheels and the output wheel are coaxial. The axes of the three surrounding wheels are perpendicular to the axes of the driving wheels.

7. The keyboard key durability testing machine according to claim 6, characterized in that: The transmission rod is rotatably connected to the bottom of the support via a connecting component. A driven wheel is slidably engaged on the outer side of the transmission rod. The driven wheel is rotatably connected to the inner side of the protective shell, and the driven wheel and the output wheel mesh.

8. The keyboard key durability testing machine according to claim 1, characterized in that: Both ends of the transmission rod are fixed with a set of meshing bevel gears. The top of each bevel gear set is connected to a second spur gear set. Each second spur gear set consists of two meshing transmission gears. The output end of each second spur gear set is fixed with a self-locking transmission component.

9. The keyboard key durability testing machine according to claim 8, characterized in that: The self-locking transmission component includes a worm fixed to the inner side of the second output end of the spur gear set and a worm wheel rotatably connected to the inner side of the support. The worm wheel and the worm mesh, and the worm is rotatably connected to the inner side of the support. The worm wheel and the worm have self-locking capability. A rotating shaft is fixed to the inner side of the worm wheel, and the rotating shaft is fixedly connected to the support.

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