A detection device and a membrane switch detection method

Abstract

This invention relates to the field of membrane switch function testing technology, specifically a testing device and a membrane switch testing method. The device includes a chassis with a testing platform fixedly mounted on it; a movable frame slidably mounted on a guide rail; a lifting frame slidably fitted onto the movable frame; multiple sets of mounting frames on the movable frame; contact posts slidably fitted onto the mounting frames; contact posts for making contact with the membrane switch; a locking element on the movable frame; and a testing element and a switching element on the chassis. The testing element includes a moving block; the testing element can drive the moving block to reciprocate along the length of the lifting frame to sequentially press the contact posts to perform the testing operation; the switching element can switch the testing position. Because the time and stroke of the pressing, holding, and lifting actions of each contact post are fixed and consistent, the testing conditions (such as pressure and contact time) for each contact are highly uniform, thus ensuring the consistency and comparability of the test results.

Description

Technical Field

[0001] This invention relates to the field of membrane switch function testing technology, specifically a testing device and a membrane switch testing method. Background Technology

[0002] Membrane switches, as a common human-machine interface component, are widely used in various electronic devices, and their functional reliability directly affects the quality of the entire product. Therefore, conducting comprehensive testing of the electrical performance of each contact of the membrane switch before shipment, including continuity, resistance, and insulation, is a crucial step in ensuring product quality. Traditional testing methods often rely on manual single-point testing using tools such as multimeters, which is inefficient, labor-intensive, and prone to missed or incorrect tests due to human error. To improve testing efficiency, various automated testing devices have emerged on the market. These devices typically employ programmable probe arrays to perform scanning tests on the contacts of the membrane switch under test.

[0003] Common testing equipment includes a testing platform for fixing the testing fixture. The testing platform is equipped with an array of contact modules. During testing, the contact modules are driven to perform contact testing on the membrane switch according to the pre-designed contact logic to test its functional quality. Typically, the contact module uses multiple independent drive units to control the probes to make contact.

[0004] In devices that use multiple independent drive units to control probes for sequential triggering, it is difficult to ensure the consistency of detection conditions at each contact. Because multiple actuators (such as electromagnets or miniature cylinders) are controlled sequentially by program instructions, signal delays in the control system, scan cycles, and response differences between individual actuators can cause significant random fluctuations in the "actual action time" of each probe. This makes it difficult to equalize the effective contact time of different contacts, potentially affecting the consistency and comparability of measurements of key parameters such as contact resistance and response time. Summary of the Invention

[0005] The purpose of this invention is to provide a testing device and a membrane switch testing method to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A testing device includes a chassis, on which a testing table and a guide rail are fixedly mounted; It also includes a movable frame that is slidably mounted on the guide rail; a lifting frame is slidably fitted onto the movable frame. The movable frame is provided with multiple sets of mounting frames, which are connected to each other by equidistant members; a contact post is slidably fitted on the mounting frame; the contact post is used to make contact with the membrane switch. The movable frame is provided with a locking component; the locking component can drive the lifting frame closer to the movable frame to limit the installation frame. The chassis is equipped with a detection component and a switching component. The detection component includes a moving block that slides and engages with the lifting frame. The detection component can drive the moving block to reciprocate along the length of the lifting frame to sequentially press the contact post to perform a detection operation. The switching component can drive the moving frame to move intermittently on the guide rail after the locking component limits the mounting frame to switch the detection position.

[0007] The testing device as described above: the equidistant component includes top rods disposed on both sides of the mounting frame; the top rods are slidably engaged with the mounting frame; the mounting frame is provided with equidistant springs; the two sides of the equidistant springs respectively abut against the mounting frame and the top rods.

[0008] The testing equipment described above includes a locking component comprising a locking motor fixedly mounted on the movable frame, a lead screw fixedly mounted on the output end of the locking motor, and a threaded sleeve that is threadedly engaged with the lead screw fixedly mounted on the lifting frame.

[0009] The detection device described above includes: a locking member further comprising a locking plate fixedly mounted on the lifting frame; the locking plate being press-fitted with the mounting frame; a sliding block being slidably fitted onto the mounting frame, and a roller being rotatably mounted on the sliding block and rollingly engaging with the moving frame; a return spring being provided on the mounting frame; the two ends of the return spring abutting against the sliding block and the mounting frame respectively; a fixing block being fixedly mounted on the sliding block and rotatingly engaging with the roller; and a locking block being fixedly mounted on the mounting frame and pressing-fitting with the roller.

[0010] The testing equipment as described above includes: a testing motor fixedly mounted on the lifting frame; a testing gear fixedly mounted on the output end of the testing motor; the testing gear being an incomplete gear; a rotating shaft rotatably mounted on the lifting frame and sleeved with the moving block; a set of slots formed on the rotating shaft; a protruding post fixedly mounted on the moving block and slidably engaged with the set of slots; a pressing wheel rotatably mounted on the moving block; and a mating gear fixedly mounted on the rotating shaft that meshes with the testing gear.

[0011] The detection device described above: the groove group includes a detection inclined groove and a reset inclined groove that are interconnected at their ends; when the protruding column slides in cooperation with the detection inclined groove or the reset inclined groove, the moving block can move axially along the rotating shaft.

[0012] The detection device described above includes a wedge block fixedly mounted on the contact post; the wedge block can be pressed into the extrusion wheel, and the wedge block includes an inclined surface and a flat surface; when the extrusion wheel is engaged with the inclined surface, the contact post can slide downward within the mounting frame to approach the membrane switch; a release spring is sleeved on the contact post; the two ends of the release spring abut against the contact post and the mounting frame, respectively.

[0013] The detection equipment described above includes: a shifting component comprising a movable gear fixedly mounted on the output end of the detection motor; a rack plate fixedly mounted on the housing that meshes with the movable gear; the movable gear being an incomplete gear; symmetrically arranged connecting rods rotatably mounted on the movable frame; a guide wheel rotatably mounted at one end of each connecting rod that rolls with the guide rail; and multiple sets of connecting rods connected by tension springs.

[0014] As described above, in the detection device: when the moving gear meshes with the rack plate, the detection gear disengages from the mating gear.

[0015] A method for functional testing of a membrane switch using the testing equipment described above includes the following steps; Step 1: Install the required number of mounting frames on the moving frame according to the testing requirements; connect multiple sets of mounting frames with equidistant parts to improve testing efficiency and accuracy of test results; then lower the lifting frame by locking parts to lock the multiple sets of mounting frames and ensure the stability of the testing process. Step 2: Fix the membrane switch to be tested onto the testing stage using the testing fixture, and ensure that the membrane switch is located below the contact post to avoid testing failure; Step 3: The moving block is driven to slide back and forth by the detection component, thereby driving multiple sets of contact columns to move up and down in sequence. During the descent of the contact columns, the membrane switch will be touched. The detection system set in the chassis records and analyzes the touch results. Step 4: After the area of ​​the membrane switch is detected, the moving frame is moved by the switching component to change the range aligned with the contact post; then the detection component detects the switched range to ensure the accuracy of the detection results.

[0016] Compared with the prior art, the beneficial effects of this invention are as follows: The detection element drives the moving block to reciprocate, thereby sequentially triggering all contact pins to complete the functional testing of the membrane switch; and since the time and stroke of the pressing, holding, and lifting actions of each contact pin are fixed and consistent, the test conditions (such as pressure and contact time) of each contact point are highly uniform, thus ensuring the consistency and comparability of the test results; the shifting element drives the moving frame to move intermittently, thereby achieving automatic switching of different detection areas, thus realizing large-area, large-range continuous testing of the membrane switch; and during the testing process, the preload of the tension spring causes the guide wheel to press tightly against the guide rail, providing stable frictional resistance for the moving frame, effectively preventing accidental displacement of the equipment due to inertia or vibration, ensuring the accuracy of the detection position; the mutual cooperation between the detection element and the shifting element, i.e., when the detection gear... During the meshing drive detection action, the moving gear disengages from the rack; when the detection action is completed and the gear rotates to the disengaged position, the moving gear meshes with the rack plate to begin driving the shifting action; this ensures "absolute stillness during detection and no detection during shifting," fundamentally avoiding motion interference and guaranteeing the absolute reliability and precision of the core action; through the cooperation of the locking and shifting components, it prevents the possibility of the equipment shifting or detecting when the mounting frame is not locked or the contact column array may be loose or misaligned; it ensures that every detection is performed under the premise that all contact column spatial positions are rigidly fixed, avoiding uneven contact pressure, positioning deviation, or false triggering caused by component "loosening"; it can eliminate internal system variables and ensure that every detection is performed under optimal mechanical conditions, directly improving the reliability of detection data and the overall reliability of the equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the testing equipment.

[0018] Figure 2 This is a schematic diagram of the testing platform in the testing equipment.

[0019] Figure 3 This is a schematic diagram of the rack plate in the testing equipment.

[0020] Figure 4 for Figure 3 A schematic diagram of the structure at point A in the middle.

[0021] Figure 5 This is a schematic diagram of the lifting frame in the testing equipment.

[0022] Figure 6 for Figure 5 A schematic diagram of the structure at point B.

[0023] Figure 7 This is a schematic diagram of the lead screw column in the testing equipment.

[0024] Figure 8 This is a schematic diagram of the threaded sleeve in the testing equipment.

[0025] Figure 9 for Figure 8 A schematic diagram of the structure at point C.

[0026] Figure 10 This is a schematic diagram of the mounting frame in the testing equipment.

[0027] Figure 11 This is a schematic diagram of the top rod in the testing equipment.

[0028] Figure 12 This is a schematic diagram of the contact column in the testing equipment.

[0029] Figure 13 for Figure 12 A schematic diagram of the structure at point D.

[0030] In the diagram: 1. Chassis; 101. Guide rail; 2. Testing station; 3. Toothed plate; 4. Mobile frame; 5. Connecting rod; 6. Guide wheel; 7. Tension spring; 8. Lifting frame; 801. Threaded sleeve; 802. Locking plate; 9. Lock the motor; 10. Lead screw column; 11. Install the frame; 12. Top rod; 13. Equidistant springs; 14. Sliding block; 1401. Fixed block; 15. Return spring; 16. Rollers; 17. Locking block; 18. Click the column; 19. Wedge; 20. Inspect the motor; 21. Moving gears; 22. Inspect the gears; 23. Rotating shaft; 2301. Detection groove; 2302. Reset groove; 2303. Mating gear; 24. Moving block; 2401. Protruding column; 25. Extrusion roller; 26. Separation spring. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0033] Please see Figures 1-13 As an embodiment of the present invention, the testing equipment includes a chassis 1, on which a testing table 2 and a guide rail 101 are fixedly installed; It also includes a movable frame 4 that is slidably mounted on the guide rail 101; a lifting frame 8 is slidably fitted onto the movable frame 4. The movable frame 4 is provided with multiple sets of mounting frames 11, which are interconnected by equidistant members; a contact post 18 is slidably fitted on the mounting frame 11; the contact post 18 is used to make contact with the membrane switch. The movable frame 4 is provided with a locking component; the locking component can drive the lifting frame 8 to approach the movable frame 4 in order to limit the installation frame 11. The chassis 1 is provided with a detection component and a switching component. The detection component includes a moving block 24 that slides and engages with the lifting frame 8. The detection component can drive the moving block 24 to reciprocate along the length of the lifting frame 8 to sequentially press the contact post 18 to perform a detection operation. The switching component can drive the moving frame 4 to move intermittently on the guide rail 101 after the locking component limits the mounting frame 11 to switch the detection position.

[0034] In this embodiment, when the contact post 18 touches the membrane switch, the chassis 1 records the electrical response state of the membrane switch; that is, when the contact post 18 presses down to trigger a specific contact of the membrane switch, a detection loop is formed; the detection system monitors the on / off state, contact resistance, or voltage / current changes of this loop in real time through its internal signal acquisition circuit. These parameters are converted into digital signals and then received, recorded, and analyzed by the processor.

[0035] The system compares the recorded data with preset qualification standards (such as conduction resistance range, disconnection insulation resistance, response time, etc.) to determine whether the contact function is qualified.

[0036] The membrane switch to be tested is mounted on the testing stage 2 using a specific testing fixture, with the contact post 18 positioned above the membrane switch.

[0037] According to the testing requirements, a suitable number of mounting frames 11 (including contact posts 18) are installed on the moving frame 4; multiple sets of mounting frames 11 are connected by equidistant members, which ensure that the spacing between multiple sets of contact posts 18 is equal, making the test results relatively reliable and accurate.

[0038] Then, the locking mechanism moves the lifting frame 8 closer to the moving frame 4, thereby locking the mounting frame 11 to ensure that the position of the mounting frame 11 will not shift during testing, effectively preventing testing failure or inaccurate results due to component shaking.

[0039] The detection component is activated, which drives the moving block 24 to move along the length of the lifting frame 8. That is, the moving block 24 moves from one end of the lifting frame 8 to the other. During the movement, the moving block 24 will sequentially press multiple sets of contact posts 18, thereby driving the contact posts 18 to contact the membrane switch for functional testing. After the moving block 24 moves to one end of the lifting frame 8, the switching component will drive the moving frame 4 to slide a distance on the guide rail 101 to switch to another detection position. After that, the moving block 24 resets and confirms that the multiple sets of contact posts 18 have sequentially contacted the membrane switch.

[0040] As a further embodiment of the present invention, the equidistant member includes top rods 12 disposed on both sides of the mounting frame 11; the top rods 12 are slidably engaged with the mounting frame 11; an equidistant spring 13 is disposed on the mounting frame 11; the two sides of the equidistant spring 13 abut against the mounting frame 11 and the top rods 12 respectively.

[0041] In this embodiment, after one mounting frame 11 is installed on the movable frame 4, one side (top rod 12) of the mounting frame 11 abuts against one end of the movable frame 4; after the next mounting frame 11 is installed on the movable frame 4, the top rods 12 on the two mounting frames 11 abut against each other; multiple sets of mounting frames 11 are installed in sequence.

[0042] When the total length of multiple sets of mounting frames 11 is greater than the length of the moving frame 4, the top rods 12 between adjacent mounting frames 11 will press against each other in the axial direction, thereby compressing the equidistant springs 13 located between them; the elastic force of the equidistant springs 13 (the compression amount of multiple sets of equidistant springs 13 is consistent) makes the spacing between multiple sets of mounting frames 11 consistent, so that the test results are relatively reliable and accurate.

[0043] When faced with membrane switches of different models, sizes, and contact numbers, there is no need to replace the entire detection head or customize special equipment. Simply install the corresponding number of mounting frames 11 (each with one contact post 18) on the moving frame 4 according to the actual situation of the product to be tested; the spacing between them is automatically adjusted and locked by the equidistant parts, so that the equipment can be quickly adapted to new products, achieving "one machine for multiple uses" and significantly reducing equipment investment costs.

[0044] As a further embodiment of the present invention, the locking component includes a locking motor 9 fixedly installed on the movable frame 4, and a lead screw 10 fixedly installed on the output end of the locking motor 9; a threaded sleeve 801 that is threadedly engaged with the lead screw 10 is fixedly installed on the lifting frame 8.

[0045] In this embodiment, when the locking motor 9 is activated, it drives the lead screw 10 to rotate, thereby driving the threaded sleeve 801 to move downward along the length of the lead screw 10 through the threaded engagement, so as to move the lifting frame 8 closer to the moving frame 4 and lock the mounting frame 11; when the locking motor 9 stops rotating, the lifting frame 8 is locked through the threaded engagement (self-locking) between the lead screw 10 and the threaded sleeve 801 to avoid locking failure during the detection process.

[0046] As a further embodiment of the present invention, the locking member further includes a locking plate 802 fixedly installed on the lifting frame 8; the locking plate 802 is press-fitted with the mounting frame 11; a sliding block 14 is slidably fitted on the mounting frame 11, and a roller 16 that rolls with the moving frame 4 is rotatably installed on the sliding block 14; a return spring 15 is provided on the mounting frame 11; the two ends of the return spring 15 abut against the sliding block 14 and the mounting frame 11 respectively; a fixing block 1401 that rotates with the roller 16 is fixedly installed on the sliding block 14; and a locking block 17 that presses with the roller 16 is fixedly installed on the mounting frame 11.

[0047] In this embodiment, in the initial state, the locking block 17 is separated from the roller 16, and the roller 16 can roll freely. This allows the installation frame 11 to be installed on the movable frame 4, and the roller 16 can roll in cooperation with the movable frame 4, reducing the difficulty of installing the subsequent installation frame 11.

[0048] As the lifting frame 8 approaches the moving frame 4, the locking plate 802 approaches and presses the mounting frame 11, causing the bottom of the mounting frame 11 to approach the moving frame 4. During this process, the return spring 15 is compressed, and the sliding block 14 approaches the mounting frame 11, thereby causing the roller 16 to approach the locking block 17.

[0049] When the locking block 17 and the roller 16 come into close contact, the radial compression of the roller 16 by the locking block 17 and the fixing block 1401 increases the resistance to the rotation of the roller 16, thereby increasing the difficulty of moving the mounting frame 11. Furthermore, the compression of the mounting frame 11 by the locking plate 802 further increases the difficulty of the mounting frame 11 to move, ensuring that the position of the mounting frame 11 will not shift during testing, and effectively avoiding testing failure or inaccurate results due to component shaking.

[0050] As a further embodiment of the present invention, the detection component includes a detection motor 20 fixedly mounted on the lifting frame 8; a detection gear 22 is fixedly mounted on the output end of the detection motor 20; the detection gear 22 is an incomplete gear; a rotating shaft 23 rotatably mounted on the lifting frame 8 and sleeved with the moving block 24; a groove group is formed on the rotating shaft 23; a protruding post 2401 that slides and engages with the groove group is fixedly mounted on the moving block 24; a pressing wheel 25 is rotatably mounted on the moving block 24; and a mating gear 2303 that can mesh with the detection gear 22 is fixedly mounted on the rotating shaft 23.

[0051] As a further embodiment of the present invention, the groove group includes a detection inclined groove 2301 and a reset inclined groove 2302 that are interconnected at their ends; when the protruding post 2401 is slidably engaged with the detection inclined groove 2301 or the reset inclined groove 2302, the moving block 24 can move along the axial direction of the rotating shaft 23.

[0052] In this embodiment, during detection, the detection motor 20 drives the detection gear 22 to rotate. The detection gear 22 is an incomplete gear. When the detection gear 22 meshes with the mating gear 2303, it can drive the mating gear 2303 to rotate, thereby driving the rotating shaft 23 to rotate, which in turn drives the slot assembly to rotate. During one meshing process between the detection gear 22 and the mating gear 2303, the rotating shaft 23 can rotate one revolution.

[0053] When the slot group rotates, it will cause the protruding column 2401 to slide alternately in the detection inclined slot 2301 and the reset inclined slot 2302. When the protruding column 2401 slides in the detection inclined slot 2301, it can drive the moving block 24 to slide from one end of the lifting frame 8 to the other end. When the protruding column 2401 slides in the reset inclined slot 2302, it can drive the moving block 24 to slide in the opposite direction.

[0054] During the sliding process of the moving block 24, the extrusion wheel 25 can cooperate with multiple sets of contact posts 18 in sequence to drive the multiple sets of contact posts 18 to make contact with the membrane switch.

[0055] The detection element drives the moving block 24 to reciprocate, thereby triggering all the contact posts 18 in sequence to complete the functional test of the membrane switch. Since the time and stroke of the pressing, holding and lifting actions of each contact post 18 are fixed and consistent, the test conditions (such as pressure and contact time) of each contact are highly uniform, thus ensuring the consistency and comparability of the test results.

[0056] As a further embodiment of the present invention, the detection element further includes a wedge 19 fixedly mounted on the contact post 18; the wedge 19 can be pressed and engaged with the extrusion wheel 25, and the wedge 19 includes an inclined surface and a flat surface; when the extrusion wheel 25 engages with the inclined surface, the contact post 18 can slide downward within the mounting frame 11 to approach the membrane switch; a separation spring 26 is sleeved on the contact post 18; the two ends of the separation spring 26 abut against the contact post 18 and the mounting frame 11 respectively.

[0057] In this embodiment, during the sliding process of the moving block 24 driving the extrusion roller 25, the extrusion roller 25 first engages with the inclined surface of the wedge block 19, thereby extruding the wedge block 19 downward to drive the contact post 18 to slide downward on the mounting frame 11 and compress the separation spring 26; when the extrusion roller 25 engages with the flat surface, the extrusion force of the contact post 18 on the membrane switch can trigger the switch; the extrusion roller 25 will roll on the flat surface to ensure the contact time and avoid contact failure due to too short a contact time; after the extrusion roller 25 separates from the wedge block 19, the elastic force of the separation spring 26 drives the contact post 18 to separate from the membrane switch.

[0058] As a further embodiment of the present invention, the shifting component includes a movable gear 21 fixedly mounted on the output end of the detection motor 20; a rack plate 3 that can mesh with the movable gear 21 is fixedly mounted on the housing 1; the movable gear 21 is an incomplete gear; symmetrically arranged connecting rods 5 are rotatably mounted on the movable frame 4; a guide wheel 6 that rolls with the guide rail 101 is rotatably mounted on one end of the connecting rod 5; multiple sets of connecting rods 5 are connected by tension springs 7.

[0059] As a further embodiment of the present invention, when the moving gear 21 meshes with the rack plate 3, the detection gear 22 disengages from the mating gear 2303.

[0060] In this embodiment, in the initial state, the tension spring 7 is in a stretched state, so the connecting rod 5 tends to rotate downwards, thereby causing the guide wheel 6 to press against the guide rail 101, thereby increasing the resistance of the moving frame 4 sliding on the guide rail 101 and avoiding the detection position deviation caused by inertia.

[0061] As the lifting frame 8 moves downward, the moving gear 21 will approach the rack plate 3, and when the locking member limits the mounting frame 11, the moving gear 21 moves to the set position. When the moving gear 21 rotates in this position, it can mesh with the rack plate 3.

[0062] Furthermore, when the detection gear 22 meshes with the mating gear 2303, the moving gear 21 disengages from the rack plate 3 to ensure that the moving frame 4 does not move during the detection process, thus ensuring the accuracy of the detection results. When the detection gear 22 disengages from the mating gear 2303, the moving gear 21 meshes with the rack plate 3, thereby driving the moving frame 4 to move a certain distance, thus switching the detection position.

[0063] The moving frame 4 is moved intermittently by the switching component to achieve automatic switching of different detection areas, thereby enabling continuous detection of membrane switches over a large area and a wide range. During the detection process, the preload of the tension spring 7 causes the guide wheel 6 to press tightly against the guide rail 101, providing stable frictional resistance for the moving frame 4, effectively preventing the equipment from being displaced unexpectedly due to inertia or vibration, and ensuring the accuracy of the detection position.

[0064] When the detection gear 22 engages to drive the detection action, the moving gear 21 disengages from the rack. When the detection action is completed and the gear rotates to the disengaged position, the moving gear 21 engages with the rack plate 3 to start driving the shifting action. This ensures that the system is "absolutely stationary during detection and not detected during shifting," fundamentally avoiding motion interference and guaranteeing the absolute reliability and accuracy of the core action.

[0065] A method for functional testing of a membrane switch using the testing equipment described above includes the following steps; Step 1: Install the required number of mounting frames 11 on the moving frame 4 according to the testing requirements; connect the multiple sets of mounting frames 11 with equidistant parts to improve testing efficiency and accuracy of test results; then lower the lifting frame 8 by locking parts to lock the multiple sets of mounting frames 11 to ensure the stability of the testing process. Step 2: Fix the membrane switch to be tested onto the testing stage 2 using the testing fixture, and ensure that the membrane switch is located below the contact post 18 to avoid testing failure; Step 3: The moving block 24 is driven to slide back and forth by the detection component, thereby driving multiple sets of contact columns 18 to move up and down in sequence. During the descent of the contact column 18, it will touch the membrane switch. The touch result is recorded and analyzed by the detection system set in the chassis 1. Step 4: After the area of ​​the membrane switch is detected, the moving frame 4 is moved by the switching component to change the range aligned with the contact post 18; then the switching range is detected by the detection component to ensure the accuracy of the detection results.

[0066] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0067] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A testing device, comprising a chassis, wherein a testing table and a guide rail are fixedly mounted on the chassis; Its features are, It also includes a movable frame that is slidably mounted on the guide rail; a lifting frame is slidably fitted onto the movable frame. The movable frame is provided with multiple sets of mounting frames, which are connected to each other by equidistant members; a contact post is slidably fitted on the mounting frame; the contact post is used to make contact with the membrane switch. The movable frame is provided with a locking component; the locking component can drive the lifting frame closer to the movable frame to limit the installation frame. The chassis is equipped with a detection component and a switching component. The detection component includes a moving block that slides and engages with the lifting frame. The detection component can drive the moving block to reciprocate along the length of the lifting frame to sequentially press the contact post to perform a detection operation. The switching component can drive the moving frame to move intermittently on the guide rail after the locking component limits the mounting frame to switch the detection position.

2. The detection device according to claim 1, characterized in that, The equidistant component includes top rods disposed on both sides of the mounting frame; the top rods are slidably engaged with the mounting frame; an equidistant spring is disposed on the mounting frame; and both sides of the equidistant spring abut against the mounting frame and the top rods, respectively.

3. The detection device according to claim 1, characterized in that, The locking component includes a locking motor fixedly installed on the movable frame, and a lead screw is fixedly installed on the output end of the locking motor; a threaded sleeve that is threadedly engaged with the lead screw is fixedly installed on the lifting frame.

4. The detection device according to claim 3, characterized in that, The locking component further includes a locking plate fixedly installed on the lifting frame; the locking plate is pressed against the mounting frame; a sliding block is slidably fitted on the mounting frame, and a roller that rolls with the moving frame is rotatably installed on the sliding block; a return spring is provided on the mounting frame; the two ends of the return spring abut against the sliding block and the mounting frame respectively; a fixing block that rotates with the roller is fixedly installed on the sliding block; and a locking block that presses against the roller is fixedly installed on the mounting frame.

5. The testing device according to claim 1, characterized in that, The detection component includes a detection motor fixedly mounted on the lifting frame; a detection gear fixedly mounted on the output end of the detection motor; the detection gear is an incomplete gear; a rotating shaft rotatably mounted on the lifting frame and sleeved with the moving block; a set of slots is formed on the rotating shaft; a protruding post fixedly mounted on the moving block and slidably engaged with the set of slots; a pressing wheel rotatably mounted on the moving block; and a mating gear fixedly mounted on the rotating shaft that can mesh with the detection gear.

6. The detection device according to claim 5, characterized in that, The groove group includes a detection groove and a reset groove that are interconnected at their ends; when the protruding post slides in conjunction with the detection groove or the reset groove, the moving block can move axially along the rotating shaft.

7. The detection device according to claim 5, characterized in that, The detection element further includes a wedge block fixedly installed on the contact post; the wedge block can be pressed and engaged with the extrusion wheel, and the wedge block includes an inclined surface and a flat surface; when the extrusion wheel engages with the inclined surface, the contact post can slide downward within the mounting frame to approach the membrane switch; a release spring is sleeved on the contact post; the two ends of the release spring abut against the contact post and the mounting frame, respectively.

8. The detection device according to claim 5, characterized in that, The shifting component includes a movable gear fixedly installed on the output end of the detection motor; a rack plate that can mesh with the movable gear is fixedly installed on the chassis; the movable gear is an incomplete gear; symmetrically arranged connecting rods are rotatably installed on the movable frame; a guide wheel that rolls with the guide rail is rotatably installed at one end of the connecting rod; multiple sets of connecting rods are connected by tension springs.

9. The detection device according to claim 8, characterized in that, When the moving gear meshes with the rack plate, the detection gear disengages from the mating gear.

10. A method for functional testing of a membrane switch using the testing equipment described in any one of claims 1-9, characterized in that, Includes the following steps; Step 1: Install the required number of mounting frames on the moving frame according to the testing requirements; connect multiple sets of mounting frames with equidistant parts to improve testing efficiency and accuracy of test results; then lower the lifting frame by locking parts to lock the multiple sets of mounting frames and ensure the stability of the testing process. Step 2: Fix the membrane switch to be tested onto the testing stage using the testing fixture, and ensure that the membrane switch is located below the contact post to avoid testing failure; Step 3: The moving block is driven to slide back and forth by the detection component, thereby driving multiple sets of contact columns to move up and down in sequence. During the descent of the contact columns, the membrane switch will be touched. The detection system set in the chassis records and analyzes the touch results. Step 4: After the area of ​​the membrane switch is detected, the moving frame is moved by the switching component to change the range aligned with the contact post; then the detection component detects the switched range to ensure the accuracy of the detection results.

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