Membrane switch performance detection device

Abstract

The invention discloses a membrane switch performance detection device, and belongs to the field of switch testing, the membrane switch performance detection device comprises a container, a containing cavity formed in the container, a top plate located above the container, and height adjusting assemblies fixedly connected to the two sides of the container and used for driving the top plate to ascend and descend, and heating parts are fixedly connected to the side wall and the bottom wall of the containing cavity; a sensor is fixedly connected to the side wall of the accommodating cavity; the upper end of the top plate is connected with an immersion detection assembly, and the immersion detection assembly comprises a support fixedly connected to the upper end of the top plate, a lead screw with one end rotationally connected with the inner wall of the support and the other end rotationally connected with the upper end of the top plate, and a first motor fixedly connected to the upper end of the support, and an output shaft of the first motor is fixedly connected with one end of the lead screw. According to the scheme, the heating part is arranged in the container to heat the water body in the accommodating cavity, so that the surface tension of the water body is changed, the stress of the sealing element and the water leakage probability of the micro-channel can be changed, a sample is subjected to immersion test in the water body at different temperatures, reliability verification closer to complex working conditions is realized, and customized authentication requirements are met.

Description

Technical Field

[0001] The present invention relates to the field of switch testing, and more particularly to a membrane switch performance detection device. Background Art

[0002] A membrane switch is a touch switch integrated on a flexible membrane. It is essentially a momentary contact switch (press to turn on, release to turn off) and is widely used in the control panels of various electronic devices.

[0003] Membrane switches require performance testing after production. These tests include pressure testing (to test button life and tactile feel), wear testing (to assess the wear resistance of printed markings and the material itself), and flex testing (to assess the switch's ability to withstand bending or twisting during installation or use). Immersion testing is also a type of performance testing. This is an environmental reliability test that primarily verifies the seal and waterproofing of membrane switches and is a crucial component of membrane switch performance testing. Currently, immersion testing is typically performed by sampling samples, immersing them in water for a period of time, then removing them and testing their conductivity. While immersion testing is feasible, it cannot be customized to meet customer requirements, such as testing performance at varying depths and temperatures, making it difficult to meet customized certification requirements. Summary of the Invention

[0004] In view of the problems existing in the prior art, the present invention aims to provide a membrane switch performance detection device.

[0005] To solve the above problems, the present invention adopts the following technical solutions.

[0006] A membrane switch performance detection device includes a container, a cavity opened inside the container, a top plate located above the container, and a height adjustment component fixed to both sides of the container to drive the top plate to rise and fall. The side walls and bottom wall of the cavity are both fixedly connected with a heating portion, and the side walls of the cavity are also fixedly connected with a sensor; The upper end of the top plate is connected to an immersion detection assembly, and the immersion detection assembly includes a bracket fixedly connected to the upper end of the top plate, a screw rod with one end rotatably connected to the inner wall of the bracket and the other end rotatably connected to the upper end of the top plate, a motor 1 fixedly connected to the upper end of the bracket and the output shaft fixedly connected to one end of the screw rod, a movable seat 1 screwed onto the outside of the screw rod, two guide pillars with one end fixedly connected to the lower end of the movable seat and the other end passing through the top plate and extending into the cavity, a movable seat 2 fixedly connected to the lower ends of the two guide pillars, a plurality of positioning parts fixedly connected to the lower end of the movable seat 2 for fixing the sample, and a detector fixedly connected to the upper end of the movable seat 1.

[0007] Furthermore, the positioning part includes a plate body 1 fixedly connected to the lower end of the movable seat 2, a plurality of silicone pressing sheets connected to one side of the plate body 1, and an underwater connector fixedly connected to the lower end of the movable seat 2. The transmission interface of the underwater connector is sealed and fixed inside the movable seat 2 and is connected to the detector through a wire inside one of the guide columns.

[0008] Furthermore, the plate body is provided with a plurality of movable grooves, and a plurality of sliders are slidably connected in the plurality of movable grooves, a plurality of movable rods are fixedly connected to one side of the plurality of sliders, and one end of the plurality of movable rods extends outward through the plate body and is respectively fixedly connected to the plurality of silicone pressing sheets, a plurality of springs are also provided inside the plurality of movable grooves, and the plurality of springs are sleeved on the outside of the plurality of movable rods.

[0009] Furthermore, an electric heating plate is fixedly connected inside the plate body.

[0010] Furthermore, a water inlet is provided on the upper end of the top plate, a drain outlet is provided on the side wall of the container, a plurality of guide grooves are provided inside the container, and a plurality of guide rods are fixedly connected to the lower end of the top plate and respectively inserted into the plurality of guide grooves.

[0011] Furthermore, the lower end of the movable seat 2 is connected to a disturbance flow detection part, and the disturbance flow detection part includes a slider 2 connected to both sides of the movable seat 2, a bottom plate fixed to the lower ends of the two sliders 2, a flow channel opened inside the bottom plate, and a plurality of nozzles fixed to the upper end of the bottom plate and connected to the flow channel, and the liquid outlet direction of the plurality of nozzles is toward the plate body 1, the lower end of the top plate is fixed to a pump body, and the input end of the pump body is fixed to a water suction pipe, and the output end of the pump body is connected to the flow channel in the bottom plate.

[0012] Furthermore, sliding grooves are provided on both sides of the movable seat 2, and the two sliders 2 are slidably connected in the two sliding grooves respectively. Screw holes are provided inside the two sliders 2 and on the inner walls of the two sliding grooves, and the position of the slider 2 in the sliding groove is positioned by screwing bolts into the screw holes.

[0013] Furthermore, the lower end of the movable seat 2 is also connected to a dynamic detection component, and the dynamic detection component includes two movable grooves 2 opened at the lower end of the movable seat 2, two slides respectively slidably connected to the two movable grooves 2, a plate body 2 fixedly connected to the lower ends of the two slides, multiple columns fixedly connected to one side of the plate body 2, multiple rods respectively screwed on the inside of multiple columns, multiple rubber pressing heads respectively fixed to one end of multiple rods, a tooth groove opened inside one of the slides, an incomplete gear located inside the tooth groove and rotatably connected to the inner wall of one of the movable grooves 2, the upper end of the movable seat 1 is fixedly connected to the motor 2, one of the guide columns is rotatably connected to a transmission shaft, and the two ends of the transmission shaft are respectively connected to the output shaft of the motor 2 and the incomplete gear.

[0014] Furthermore, a dynamic sealing portion is connected to the interior of one of the guide pillars, and the dynamic sealing portion is arranged on the outside of the transmission shaft to dynamically seal the transmission shaft.

[0015] Furthermore, a negative pressure interface is provided at the upper end of the top plate, a negative pressure device is fixedly connected to one side of the container, and the negative pressure end of the negative pressure device is connected to the negative pressure interface through a hose, an ultrasonic generating part is fixedly connected to the upper end of the movable seat one, and a plurality of ultrasonic transducer parts are fixedly connected to the lower end of the movable seat two, and the ultrasonic generating part is connected to the ultrasonic transducer part.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) This solution heats the water in the cavity by setting a heating part in the container, causing the surface tension of the water to change, which will change the force on the seal and the probability of water leakage in the microchannel, so that the sample can be immersed in water at different temperatures for testing, achieving reliability verification that is closer to complex working conditions. In addition, the depth of the sample in the water can be adjusted through the immersion detection component, allowing the membrane switch to be tested under different water pressures. At the same time, it can also simulate the up and down reciprocating movement of the sample in the water and simulate the installation / disassembly scenario. It can not only verify the standard IP level, but also perform customized testing according to customer needs. In the extreme environment closest to actual use, it can quickly locate the failure threshold of the sealant, conductive ink and probe interface to meet customized certification requirements.

[0017] (2) This solution is equipped with a disturbance flow detection unit, which can simulate the real environment and expose potential failures. When the sample is immersed in water for testing, the water in the cavity can be pumped to the nozzle through the pump body. The water sprayed from the nozzle can flow around the sample, thereby causing water flow disturbance on the sample surface and destroying the boundary layer. The water flow can not only "wash" the edge sealing glue, but also generate micro-vibrations on the film surface, amplifying micro-cracks caused by temperature cycles or mechanical stress, and capturing edge leakage risks in advance. It can detect micro-leakage gaps caused by the shear force of water flow that may not be discovered in static immersion testing. In addition, flowing water can prevent temperature stratification and ensure that all samples are heated / cooled uniformly.

[0018] (3) This solution is equipped with a dynamic detection component, which can repeatedly trigger the switch in the submerged state, and can capture the signal changes such as on-resistance and contact bounce in real time, ensuring that the switch is still stable and reliable when operated underwater, and can reveal the key failure mode that cannot be triggered by immersion alone. The slight relative displacement between the film and the carrier when pressed will form shear and tear stress on the edge rubber strip or roll-coated tape, and detect the durability of the sealing material under water pressure + mechanical pulling. Many application scenarios (such as diving instrument panels, dishwasher panels, and medical endoscope buttons) require manual or mechanical buttons when immersed in water. Static immersion cannot verify the "immersion + operation" synergistic effect, but the dynamic detection component can restore the actual use conditions to meet customized detection needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the cavity, heating part, sensor and guide groove of the present invention; Figure 3 This is a schematic structural diagram of the immersion detection assembly of the present invention; Figure 4 This is a schematic diagram of the plate body 1 and the silica gel tableting structure of the present invention; Figure 5 It is a structural schematic diagram of the underwater connector of the present invention; Figure 6 It is a schematic diagram of the pump body and water pumping pipe structure of the present invention; Figure 7 This is a schematic structural diagram of the slideway, screw hole, slider 2, bottom plate, nozzle and ultrasonic generating part of the present invention; Figure 8 It is a structural diagram of the dynamic detection component and ultrasonic transducer of the present invention; Figure 9 This is a schematic structural diagram of the negative pressure interface and negative pressure equipment of the present invention; Figure 10 It is a cross-sectional view of the plate body of the present invention.

[0020] Description of the numbers in the figure: 1. Container; 11. Drain outlet; 12. Cavity; 13. Heating unit; 14. Sensor; 15. Guide groove; 2. Top plate; 21. Water inlet; 3. Height adjustment assembly; 4. Immersion detection assembly; 41. Bracket; 42. Guide column; 43. Screw; 44. Motor 1; 45. Movable seat 1; 46. Movable seat 2; 47. Guide rod; 48. Positioning unit; 481. Plate 1; 482. Silicone pressure piece; 483. Underwater connector; 484. Heating plate; 485. Movable groove 1; 486. Slider 1; 48 7. Spring; 488. Movable rod; 49. Detector; 5. Turbulence detection unit; 51. Slide groove; 52. Screw hole; 53. Slider 2; 54. Bottom plate; 55. Nozzle; 56. Pump body; 57. Suction pipe; 6. Dynamic detection component; 61. Movable groove 2; 62. Slide seat; 63. Plate body 2; 64. Column; 65. Rod body; 66. Tooth groove; 67. Incomplete gear; 68. Motor 2; 69. Rubber pressing head; 7. Ultrasonic generating unit; 8. Ultrasonic transducer unit; 9. Negative pressure interface; 10. Negative pressure equipment. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] See also Figures 1 to 10 A membrane switch performance testing device includes a container 1, a cavity 12 provided inside the container 1, a top plate 2 located above the container 1, and a height adjustment assembly 3 fixed to both sides of the container 1 for driving the top plate 2 to rise and fall. The side walls and bottom wall of the cavity 12 are fixedly connected with a heating portion 13, and the side walls of the cavity 12 are also fixedly connected with a sensor 14; An immersion detection assembly 4 is connected to the upper end of the top plate 2, and the immersion detection assembly 4 includes a bracket 41 fixed to the upper end of the top plate 2, a screw rod 43 with one end rotatably connected to the inner wall of the bracket 41 and the other end rotatably connected to the upper end of the top plate 2, a motor 44 fixed to the upper end of the bracket 41 and the output shaft fixed to one end of the screw rod 43, a movable seat 45 screwed to the outside of the screw rod 43, two guide pillars 42 with one end fixed to the lower end of the movable seat 45 and the other end passing through the top plate 2 and extending into the cavity 12, a movable seat 2 46 fixed to the lower end of the two guide pillars 42, a plurality of positioning parts 48 fixed to the lower end of the movable seat 2 46 for fixing the sample, and a detector 49 fixed to the upper end of the movable seat 1 45.

[0023] The positioning part 48 includes a plate body 481 fixedly connected to the lower end of the movable seat 2 46, a plurality of silicone pressing sheets 482 connected to one side of the plate body 481, and an underwater connector 483 fixedly connected to the lower end of the movable seat 2 46. The transmission interface of the underwater connector 483 is sealed and fixed inside the movable seat 2 46 and is connected to the detector 49 through a wire inside one of the guide columns 42.

[0024] A plurality of movable grooves 485 are provided inside the plate body 481, and a plurality of sliders 486 are slidably connected in the plurality of movable grooves 485, and a plurality of movable rods 488 are fixedly connected to one side of the plurality of sliders 486, and one end of the plurality of movable rods 488 extends outward through the plate body 481 and is respectively fixedly connected to the plurality of silicone pressing sheets 482, and a plurality of springs 487 are also provided inside the plurality of movable grooves 485, and the plurality of springs 487 are sleeved on the outside of the plurality of movable rods 488.

[0025] An electric heating plate 484 is also fixedly connected inside the plate body 481.

[0026] A water inlet 21 is provided at the upper end of the top plate 2 , a drain outlet 11 is provided on the side wall of the container 1 , a plurality of guide grooves 15 are provided inside the container 1 , and a plurality of guide rods 47 are fixed to the lower end of the top plate 2 and respectively inserted into the plurality of guide grooves 15 .

[0027] By adopting the above technical solution, valves are installed at the water inlet 21 and the drain outlet 11 in actual use. Water enters the cavity 12 through the water inlet 21. When the water in the cavity 12 needs to be replaced, the water in the cavity 12 can be discharged through the drain outlet 11, and the height adjustment component 3 (a screw drive component composed of a motor, an adjustment screw and an adjustment guide rod, etc., the top plate 2 is screwed to the adjustment screw and the movable sleeve is arranged on the outside of the adjustment guide rod. The motor drives the adjustment screw to rotate to drive the top plate 2 to rise and fall. It belongs to a mature existing technology and will not be described here) works to drive the top plate 2 to rise. The opening above the cavity 12 can be opened, and at the same time, the positioning portion 48 below the top plate 2 can be moved out of the cavity 12 and exposed to the outside, and the silicone pressing piece 482 is pulled to move the slider 486 toward the direction of the spring 487, and then the membrane switch to be tested is placed between the silicone pressing piece 482 and the plate 1 481, and the silicone pressing piece 482 is released. The spring 487 drives the slider 486 and the silicone pressing piece 482 to move and reset. The membrane switch can be positioned by the silicone pressing piece 482, and the height adjustment component 3 is controlled to work and drive the top plate 2 to descend and reset, so that the lower end of the top plate 2 contacts the upper end of the container 1. It is necessary to say here that It is clear that a sealing strip is provided between the lower end of the top plate 2 and the upper end of the container 1 for achieving sealing. After the top plate 2 is reset, the control motor 1 44 is operated and drives the screw 43 to rotate. The screw 43 drives the movable seat 1 45 to descend. The movable seat 1 45 descends and drives the movable seat 2 46 to descend through the two guide pillars 42. The movable seat 2 46 descends and drives the positioning part 48 and the membrane switch to descend, so that the membrane switch is immersed in the water body. By controlling the depth of the membrane switch in the water body, immersion tests at different depths are simulated, and the membrane switch is tested under different water pressures. At the same time, the motor 1 44 can be controlled to work and drive the membrane switch to be moved up and down in the water. The reciprocating motion simulates installation / disassembly scenarios, which can not only verify the standard IP rating, but also conduct customized testing according to customer needs. In the extreme environment closest to actual use, the failure threshold of sealant, conductive ink and probe interface can be quickly located to meet customized certification requirements. The heating part 13 in the cavity 12 can heat the water in the cavity 12, causing the surface tension of the water to change, which will change the force on the seal and the probability of water leakage in the microchannel. The sample can be immersed in water at different temperatures for testing, achieving reliability verification closer to complex working conditions. The temperature of the water is detected by the sensor 14.After the static immersion test is completed, movable seat 1 45 is controlled to rise and reset, and height adjustment assembly 3 is controlled to operate, driving top plate 2 to rise, removing the membrane switch from cavity 12. Then, electric heating plate 484 (the control circuitry of electric heating plate 484 can be routed through the interior of guide post 42 and sealed. This is also a mature existing technology and will not be described in detail here) is controlled to heat the membrane switch on plate 1 481 to quickly dry it. The membrane switch test connector (since the membrane switch may need to be subjected to a dynamic immersion test, the test connector requires an underwater wet-plug connector. This connector is soldered / crimped to a cable with a standard waterproof connector, such as an IP68 wiring harness, through the membrane switch output end. The cable is then soldered to the underwater wet-plug connector. Underwater wet-plug connectors are a mature existing technology and will not be described in detail here) is then inserted into underwater connector 483 (also using a matching underwater wet-plug connector). The resistance value of the membrane switch is read using tester 49 to complete the immersion performance test.

[0028] like Figure 6 and Figure 7 As shown, the lower end of the movable seat 2 46 is connected to the disturbance flow detection part 5, and the disturbance flow detection part 5 includes a slider 2 53 connected to both sides of the movable seat 2 46, a bottom plate 54 fixed to the lower ends of the two sliders 2 53, a flow channel opened inside the bottom plate 54, and a plurality of nozzles 55 fixed to the upper end of the bottom plate 54 and connected to the flow channel, and the liquid outlet direction of the plurality of nozzles 55 is toward the plate body 1 481, the lower end of the top plate 2 is fixedly connected to the pump body 56, and the input end of the pump body 56 is fixedly connected to the water pumping pipe 57, and the output end of the pump body 56 is connected to the flow channel in the bottom plate 54.

[0029] Slide grooves 51 are provided on both sides of the movable seat 2 46 , and two sliders 2 53 are slidably connected in the two slide grooves 51 , respectively. Screw holes 52 are provided inside the two sliders 2 53 and on the inner walls of the two slide grooves 51 , and the position of the slider 2 53 in the slide groove 51 is positioned by screwing bolts into the screw holes 52 .

[0030] By adopting the above technical solution, during the immersion test of the membrane switch, the pump body 56 is controlled to work, and the pump body 56 can pump out the water under the cavity 12 through the water pumping pipe 57 and pump it to the nozzle 55. The water discharged from the nozzle 55 can flow around the sample (membrane switch), thereby causing water flow disturbance on the sample surface and destroying the boundary layer. The water flow can not only "wash" the edge sealing glue, but also generate micro-vibrations on the surface of the membrane, amplifying micro-cracks caused by temperature cycles or mechanical stress, and catching the risk of edge leakage in advance, which can discover the causes that may not be discovered by static immersion testing. The problem of micro-leakage gaps under the action of water shear force, and flowing water can also prevent temperature stratification, ensuring that all samples are heated / cooled uniformly, which can simulate the real environment and expose potential failure hazards; in order to facilitate the installation of the membrane switch on the plate body 481, the bolt can be unscrewed from the screw hole 52 during the installation process, so that the slider 2 53 can slide in the slide groove 51, so that the position of the bottom plate 54 can be moved, which makes it convenient to fix the sample on the plate body 481 from the bottom of the plate body 481. After the fixation is completed, the position of the slider 2 53 and the bottom plate 54 can be adjusted to move them to their original position.

[0031] like Figure 7 and Figure 8 As shown, the lower end of the movable seat 2 46 is also connected to a dynamic detection component 6, and the dynamic detection component 6 includes two movable grooves 2 61 opened at the lower end of the movable seat 2 46, two slides 62 respectively slidably connected to the two movable grooves 2 61, a plate body 2 63 fixed to the lower ends of the two slides 62, a plurality of columns 64 fixed to one side of the plate body 2 63, a plurality of rods 65 respectively screwed inside the plurality of columns 64, a plurality of rubber pressing heads 69 respectively fixed to one end of the plurality of rods 65, a tooth groove 66 opened inside one of the slides 62, and an incomplete gear 67 located inside the tooth groove 66 and rotatably connected to the inner wall of one of the movable grooves 2 61. The upper end of the movable seat 1 45 is fixed with a motor 2 68, and a transmission shaft is rotatably connected inside one of the guide columns 42, and the two ends of the transmission shaft are respectively connected to the output shaft of the motor 2 68 and the incomplete gear 67.

[0032] A dynamic sealing portion is further connected to the interior of one of the guide pillars 42 (end face dynamic sealing is a mature existing technology and will not be described in detail here), and the dynamic sealing portion is arranged on the outside of the transmission shaft to dynamically seal the transmission shaft.

[0033] By adopting the above technical solution, during the immersion test of the membrane switch, the operation of the second motor 68 can be controlled to drive the transmission shaft inside the guide column 42 to rotate, and the transmission shaft drives the incomplete gear 67 to rotate. The rotation of the incomplete gear 67 can engage with the tooth groove 66 to drive one of the slides 62 to reciprocate in the movable groove 2 61. The reciprocating motion of the slide 62 drives the reciprocating motion of the second plate 63, and the reciprocating motion of the second plate 63 drives the column 64 and the rod 65 to reciprocate. The outer surface of the rod 65 is provided with a thread and is screwed into the screw groove inside the column 64. The length of the rod 65 extending from the column 64 can be adjusted. When the rod 65 moves, it can drive the rubber pressing head 69 to move. When the rubber pressing head 69 moves and contacts the membrane switch on the plate 1 481, the rubber pressing head 69 can press the membrane switch. The membrane switch is pressed and repeatedly triggered in the submerged state, which can capture signal changes such as on-resistance and contact bounce in real time (before performing the immersion dynamic test, the test connector of the membrane switch needs to be inserted into the underwater connector 483 in advance), ensuring that the switch remains stable and reliable during underwater operation, and can reveal key failure modes that cannot be triggered by immersion alone. The slight relative displacement between the membrane and the carrier when pressed will form shear and tear stresses on the edge rubber strip or roll-coated tape, and test the durability of the sealing material under water pressure + mechanical pulling. Many application scenarios (such as diving instrument panels, dishwasher panels, and medical endoscope buttons) require manual or mechanical buttons when immersed in water. Static immersion cannot verify the "immersion + operation" synergistic effect, but the dynamic detection component 6 can restore the actual usage conditions to meet customized detection needs.

[0034] like Figure 7 and Figure 8 As shown, a negative pressure interface 9 is provided at the upper end of the top plate 2, a negative pressure device 10 is fixedly connected to one side of the container 1, and the negative pressure end of the negative pressure device 10 is connected to the negative pressure interface 9 through a hose, an ultrasonic generating part 7 is fixedly connected to the upper end of the movable seat 1 45, and a plurality of ultrasonic transducer parts 8 are fixedly connected to the lower end of the movable seat 2 46, and the ultrasonic generating part 7 is connected to the ultrasonic transducer part 8.

[0035] By adopting the above technical solution, the output end of the ultrasonic generator 7 is passed through one of the guide pillars 42 and connected to the ultrasonic transducer 8 (the ultrasonic generator 7 and the ultrasonic transducer 8 are both existing technologies and will not be described in detail here). By sealing the water inlet 21 and operating the negative pressure device 10, a negative pressure can be formed inside the cavity 12. At this time, the ultrasonic generator 7 is controlled to operate so that the ultrasonic transducer 8 operates to generate ultrasonic waves, which are transmitted to the movable seat 2 46. The ultrasonic waves combined with the negative pressure inside the cavity 12 can cause the bubbles on the membrane switch to rise quickly to the water surface, removing the bubbles, and effectively eliminating poor contact and leakage caused by air film isolation. After the bubbles are removed, the negative pressure device 10 and the ultrasonic generator 7 stop working. It should be noted that the working state of the negative pressure device 10 and the ultrasonic generator 7 is after the membrane switch is immersed in water and before the membrane switch immersion test, and is only used to remove bubbles carried by the sample when it is immersed in water from the air, to avoid possible impact on the detection accuracy.

[0036] Instructions for use: Valves are installed at the water inlet 21 and the drain outlet 11. Water enters the cavity 12 through the water inlet 21. When the water in the cavity 12 needs to be replaced, the water in the cavity 12 can be discharged through the drain outlet 11. The height adjustment component 3 is controlled to work and drive the top plate 2 to rise. The rise of the top plate 2 can open the opening above the cavity 12. At the same time, the positioning part 48 below the top plate 2 can be moved out of the cavity 12 and exposed to the outside. The sample is installed on the plate body 481, the height adjustment component 3 is controlled to work and drive the top plate 2 to descend and reset, the motor 44 is controlled to work and drive the screw rod 43 to rotate, and the screw rod 43 drives the movable seat The movable seat 1 45 descends, and the movable seat 1 45 descends, driving the movable seat 2 46 to descend through the two guide pillars 42. The movable seat 2 46 descends, driving the positioning portion 48 and the membrane switch to descend, so that the membrane switch is immersed in the water. After the static immersion test is completed, the movable seat 1 45 is controlled to rise and reset, and the height adjustment component 3 is controlled to work to drive the top plate 2 to rise, so that the membrane switch is removed from the cavity 12. Then, the electric heating plate 484 is controlled to work to heat the membrane switch on the plate 1 481 to make it dry quickly. The test connector of the membrane switch is inserted into the underwater connector 483, and the resistance value of the membrane switch is read by the detector 49 to complete the immersion performance test. When conducting a dynamic immersion test, the sample is fixed on plate 1 481 while the test connector of the membrane switch is inserted into the underwater connector 483. During the immersion test of the membrane switch, the pump body 56 is controlled to operate. The pump body 56 can pump water from under the cavity 12 through the suction pipe 57 and pump it to the nozzle 55. The water discharged from the nozzle 55 can flow around the sample (membrane switch), thereby disturbing the water flow on the sample surface. At the same time, the motor 2 68 is controlled to operate to drive the incomplete gear 67 to rotate. The rotation of the incomplete gear 67 drives the slide 62 and plate 2 63 to move. The reciprocating motion of plate 2 63 drives the column 64 and rod 65 to reciprocate. When the rod 65 moves, it can drive the rubber pressing head 69 to move. When the rubber pressing head 69 moves and contacts the membrane switch on plate 1 481, the rubber pressing head 69 can press the membrane switch, repeatedly triggering the switch in the submerged state.

[0037] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed by the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A membrane switch performance testing device, comprising a container (1), a cavity (12) provided inside the container (1), a top plate (2) located above the container (1), and a height adjustment assembly (3) fixed to both sides of the container (1) for driving the top plate (2) to rise and fall, characterized in that: The side walls and bottom wall of the cavity (12) are both fixedly connected to a heating portion (13), and a sensor (14) is also fixedly connected to the side wall of the cavity (12); The upper end of the top plate (2) is connected to an immersion detection assembly (4), and the immersion detection assembly (4) includes a bracket (41) fixed to the upper end of the top plate (2), a screw (43) with one end rotatably connected to the inner wall of the bracket (41) and the other end rotatably connected to the upper end of the top plate (2), a motor (44) fixed to the upper end of the bracket (41) and the output shaft fixed to one end of the screw (43), a movable seat (45) screwed to the outside of the screw (43), two guide pillars (42) with one end fixed to the lower end of the movable seat (45) and the other end passing through the top plate (2) and extending into the cavity (12), a movable seat (46) fixed to the lower ends of the two guide pillars (42), a plurality of positioning parts (48) fixed to the lower end of the movable seat (46) for fixing the sample, and a detector (49) fixed to the upper end of the movable seat (45).

2. The membrane switch performance detection device according to claim 1, characterized in that: The positioning portion (48) includes a plate body (481) fixedly connected to the lower end of the movable seat (46), a plurality of silicone pressing sheets (482) connected to one side of the plate body (481), and an underwater connector (483) fixedly connected to the lower end of the movable seat (46). The transmission interface of the underwater connector (483) is sealed and fixed inside the movable seat (46) and is connected to the detector (49) through a wire inside one of the guide pillars (42).

3. The membrane switch performance detection device according to claim 2, characterized in that: A plurality of movable grooves (485) are provided inside the plate body (481), and a plurality of sliders (486) are slidably connected in the plurality of movable grooves (485), a plurality of movable rods (488) are fixedly connected to one side of the plurality of sliders (486), and one end of the plurality of movable rods (488) extends outward through the plate body (481) and is fixedly connected to the plurality of silicone pressing sheets (482), a plurality of springs (487) are also provided inside the plurality of movable grooves (485), and the plurality of springs (487) are sleeved on the outside of the plurality of movable rods (488).

4. The membrane switch performance detection device according to claim 3, characterized in that: An electric heating plate (484) is also fixedly connected inside the plate body 1 (481).

5. The membrane switch performance detection device according to claim 4, characterized in that: A water inlet (21) is provided at the upper end of the top plate (2), a water outlet (11) is provided on the side wall of the container (1), a plurality of guide grooves (15) are provided inside the container (1), and a plurality of guide rods (47) are fixedly connected to the lower end of the top plate (2) and are respectively inserted into the plurality of guide grooves (15).

6. The membrane switch performance detection device according to claim 5, characterized in that: The lower end of the movable seat 2 (46) is connected to a disturbance flow detection unit (5), and the disturbance flow detection unit (5) includes a slider 2 (53) connected to both sides of the movable seat 2 (46), a bottom plate (54) fixed to the lower ends of the two sliders 2 (53), a flow channel opened inside the bottom plate (54), and a plurality of nozzles (55) fixed to the upper end of the bottom plate (54) and connected to the flow channel, and the liquid discharge direction of the plurality of nozzles (55) is toward the plate body 1 (481), the lower end of the top plate (2) is fixed to a pump body (56), and the input end of the pump body (56) is fixed to a water pumping pipe (57), and the output end of the pump body (56) is connected to the flow channel in the bottom plate (54).

7. The membrane switch performance detection device according to claim 6, characterized in that: Both sides of the movable seat 2 (46) are provided with sliding grooves (51), and the two sliders 2 (53) are slidably connected in the two sliding grooves (51), and screw holes (52) are provided inside the two sliders 2 (53) and on the inner walls of the two sliding grooves (51). The position of the slider 2 (53) in the sliding groove (51) is positioned by screwing bolts into the screw holes (52).

8. The membrane switch performance detection device according to claim 7, characterized in that: The lower end of the movable seat 2 (46) is also connected to a dynamic detection component (6), and the dynamic detection component (6) includes two movable grooves 2 (61) provided at the lower end of the movable seat 2 (46), two slides (62) respectively slidably connected to the two movable grooves 2 (61), a plate body 2 (63) fixed to the lower ends of the two slides (62), a plurality of columns (64) fixed to one side of the plate body 2 (63), a plurality of rods (65) respectively screwed into the interior of the plurality of columns (64), and a plurality of rods (65) respectively screwed into the interior of the plurality of rods (64). A plurality of rubber pressing heads (69) at one end of the rod body (65), a tooth groove (66) provided inside one of the slide seats (62), an incomplete gear (67) located inside the tooth groove (66) and rotatably connected to the inner wall of one of the movable grooves (61), the upper end of the movable seat (45) is fixedly connected to the motor (68), one of the guide pillars (42) is rotatably connected to a transmission shaft, and the two ends of the transmission shaft are respectively connected to the output shaft of the motor (68) and the incomplete gear (67).

9. The membrane switch performance detection device according to claim 8, characterized in that: A dynamic sealing portion is also connected to the interior of one of the guide pillars (42), and the dynamic sealing portion is arranged outside the transmission shaft to dynamically seal the transmission shaft.

10. The membrane switch performance detection device according to claim 9, characterized in that: A negative pressure interface (9) is provided at the upper end of the top plate (2), a negative pressure device (10) is fixedly connected to one side of the container (1), and the negative pressure end of the negative pressure device (10) is connected to the negative pressure interface (9) through a hose, an ultrasonic generating part (7) is fixedly connected to the upper end of the movable seat 1 (45), and a plurality of ultrasonic transducer parts (8) are fixedly connected to the lower end of the movable seat 2 (46), and the ultrasonic generating part (7) is connected to the ultrasonic transducer part (8).

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