A pre-press detection mechanism and micro switch testing machine

Abstract

The utility model discloses a kind of pre-press detection mechanism and microswitch testing machine, wherein pre-press detection mechanism includes installation base, drive unit, cam transmission assembly and running-in execution component. Drive unit rotates cam by camshaft, and periodic pre-pressure is applied to microswitch button by pushing running-in head, and high-efficiency running-in test is realized. Sliding support ensures linear motion of running-in head, and buffer pad protects button, and position detection component monitors motion state in real time. The present application can significantly improve detection efficiency and consistency, simplify equipment structure, reduce operation complexity, and is suitable for the automated detection of different specifications microswitch.

Description

Technical Field

[0001] This utility model relates to the technical field of micro switch performance testing equipment, and in particular to a pre-pressure testing mechanism and a micro switch testing machine. Background Technology

[0002] In the mass production of microswitches, slight differences can easily exist in parameters such as the initial contact state of the internal contacts and the consistency of spring force. If shipped directly from the factory, this may lead to problems such as delayed switching action, poor contact, or even failure in end devices. Therefore, a pre-press break-in process is necessary to simulate the pressing action of the microswitch in actual use, eliminate initial assembly errors, and simultaneously test the stability of the action during the pre-press process to ensure that the product performance meets the standards.

[0003] In existing technologies, the pre-compression mechanism of microswitches mostly adopts a cylinder-driven or ordinary cam-driven structure. The cylinder-driven method relies on air pressure to regulate the movement speed and pressure, which is easily affected by air source fluctuations, leading to uneven pressing force. Furthermore, the fixed reciprocating frequency of the cylinder makes it difficult to adapt to the break-in requirements of different microswitch models. While the ordinary cam-driven structure can control the movement trajectory through contour control, the cam and the actuator are mostly in sliding contact, resulting in severe wear. It also lacks precise pressure and position monitoring functions, making it impossible to determine in real time whether the pre-compression process is abnormal. This can easily lead to problems such as over-pressing damaging the switch or insufficient pre-compression causing inadequate break-in. In addition, existing mechanisms have poor compatibility; for microswitches of different sizes and button specifications, a complete set of fixtures needs to be replaced, making operation cumbersome and affecting production efficiency. Utility Model Content

[0004] This invention aims to at least partially solve one of the problems in related technologies. Therefore, one objective of this invention is to provide a pre-pressure detection mechanism for achieving efficient pre-pressure break-in and real-time performance testing of microswitches, while also possessing good compatibility and ease of operation.

[0005] A pre-compression detection mechanism, the pre-compression detection mechanism comprising: Mounting base; A drive unit, which is fixedly mounted on one side of the mounting base, is used to provide power output; A cam drive assembly is connected to the output end of the drive unit. The cam drive assembly includes a camshaft and a cam sleeved on the camshaft. The camshaft is in a driving engagement with the drive unit. A break-in execution assembly includes a sliding bracket and a break-in head. The sliding bracket is slidably mounted on the mounting base in a vertical direction. The break-in head is fixed to the lower end of the sliding bracket, and the upper end of the break-in head is connected to the cam.

[0006] Furthermore, the cam drive assembly also includes a connector. The cam includes a first connecting part and a second connecting part, which are arranged perpendicularly. The camshaft is fixedly connected to the first connecting part. One end of the connector is movably connected to one end of the second connecting part, and the other end of the connector is movably connected to the upper end of the running-in head.

[0007] Furthermore, the first connecting part has a non-circular cross-section connecting hole, the end cross-section shape of the camshaft is adapted to the connecting hole, and the camshaft is inserted into the connecting hole.

[0008] Furthermore, the mounting base has a clearance hole, the output shaft of the drive unit passes through the clearance hole and is connected to the camshaft, and the first connection part is located in the clearance hole and rotates synchronously with the camshaft.

[0009] Furthermore, the sliding bracket includes a guide rail, a slider, and a mounting plate. The guide rail is fixed to the side of the mounting base, the slider slides in cooperation with the guide rail, the mounting plate is fixed on the slider, and the running head is mounted on the lower end of the mounting plate.

[0010] Furthermore, the bottom of the running head is provided with a buffer pad, which is made of rubber.

[0011] Furthermore, the pre-compression detection mechanism also includes a position detection component, which includes a photoelectric sensor located on one side of the sliding bracket and a detection plate fixed to one side of the sliding bracket. When the sliding bracket moves up and down, the detection plate passes through the detection slot of the photoelectric sensor.

[0012] Furthermore, the centerline of the camshaft coincides with the centerline of the clearance hole.

[0013] Furthermore, the slider and the guide rail are in a sliding fit, while the mounting plate and the slider are in a fixed connection.

[0014] This utility model also proposes a micro switch testing machine, including the pre-pressure detection mechanism as described above.

[0015] The technical solutions provided in this application have the following advantages compared with the prior art: This invention achieves highly efficient pre-pressure break-in testing of microswitch buttons through the synergistic action of a cam drive assembly and a break-in execution assembly, significantly improving testing efficiency and product quality. The introduction of a cam drive structure enables highly efficient pre-pressure break-in testing of microswitch buttons. The rotational motion of the cam is converted into the linear reciprocating motion of the break-in head, which not only simplifies the mechanism design but also significantly improves the consistency and stability of the testing. Furthermore, the application of a buffer pad and a position detection assembly further enhances the reliability and safety of the mechanism, enabling it to adapt to the testing requirements of microswitches of different specifications. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] In the attached image: Figure 1 This is a schematic diagram of the structure of an embodiment of the pre-compression testing mechanism of this application; Figure 2 This is a schematic diagram of the structure of one embodiment of the pre-compression testing mechanism of this application from another perspective; Figure 3 This is a structural schematic diagram from another perspective of one embodiment of the pre-compression testing mechanism of this application; Figure 4 This is a schematic diagram of the structure of an embodiment of the micro switch testing machine of this application.

[0019] Figure label: 1. A pre-compression detection mechanism; 10. Mounting base; 11. Clearance hole; 20. Drive unit; 30. Transmission assembly; 31. Camshaft; 32. Cam; 321. First connecting part; 3211. Connecting hole; 322. Second connecting part; 33. Connecting piece; 40. Break-in execution assembly; 41. Sliding bracket; 411. Guide rail; 412. Slider; 413. Mounting plate; 42. Break-in head; 421. Buffer pad; 50. Position detection assembly; 51. Photoelectric sensor; 52. Detection plate; 100. Microswitch testing machine. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] like Figure 1 - Figure 3 As shown, the pre-compression testing mechanism 1 provided in this application includes: Mounting base 10; A drive unit 20 is fixedly disposed on one side of the mounting base 10 and is used to provide power output; A cam 32 transmission assembly 30 is connected to the output end of the drive unit 20. The cam 32 transmission assembly 30 includes a camshaft 31 and a cam 32 sleeved on the camshaft 31. The camshaft 31 is in transmission cooperation with the drive unit 20. The break-in execution assembly 40 includes a sliding bracket 41 and a break-in head 42. The sliding bracket 41 is slidably mounted on the mounting base 10 in a vertical direction. The break-in head 42 is fixed to the lower end of the sliding bracket 41, and the upper end of the break-in head 42 is connected to the cam 32.

[0023] The mounting base 10 serves as a supporting component of the overall mechanism and has multiple mounting holes for fixing other functional components. The drive unit 20 is fixedly mounted on one side of the mounting base 10 and connected to the cam 32 transmission assembly 30 via a transmission shaft. The cam 32 transmission assembly 30 includes a camshaft 31, a cam 32 sleeved on the camshaft 31, and a connector 33 for connecting the cam 32 to the break-in execution assembly 40. The break-in execution assembly 40 includes a sliding bracket 41 and a break-in head 42. The sliding bracket 41 is slidably mounted on the mounting base 10 in the vertical direction, and the break-in head 42 is fixed to the lower end of the sliding bracket 41 and contacts the button of the micro switch to be tested.

[0024] In practical implementation, after the drive unit 20 is started, it drives the cam 32 to rotate via the camshaft 31. The profile design of the cam 32 causes it to push the break-in head 42 up and down in the vertical direction during rotation, thereby applying periodic pre-pressure to the button of the micro switch. This periodic pre-pressure not only simulates the pressing process in actual use, but also effectively eliminates the initial stress inside the micro switch, improving its service life and stability.

[0025] The design of the sliding bracket 41 further improves the operating accuracy of the mechanism. The cooperation between the guide rail 411 and the slider 412 ensures the linear movement of the running head 42, avoiding detection errors caused by tilting or offset. The introduction of the buffer pad 421 effectively protects the micro switch button, preventing irreversible damage caused by excessive pressure.

[0026] The mounting base 10 is a support component of an integral structure, with multiple mounting holes for fixing other functional components. The drive unit 20 is fixed to one side of the mounting base 10 by bolts, and its output shaft passes through the clearance hole 11 on the mounting base 10 and is connected to the cam 32 transmission assembly 30. The cam 32 transmission assembly 30 consists of a camshaft 31, a cam 32 sleeved on the camshaft 31, and a connecting member 33. The first connecting portion 321 of the connecting member 33 has a non-circular cross-section connecting hole 3211. The end shape of the camshaft 31 matches the connecting hole 3211 and is inserted into it, thereby achieving a fixed connection between the camshaft 31 and the connecting member 33. The second connecting portion 322 of the connecting member 33 is movably connected to one end of the cam 32, and the other end of the cam 32 contacts the running head 42. The break-in execution assembly 40 includes a sliding bracket 41 and a break-in head 42. The sliding bracket 41 is slidably mounted on the mounting base 10 in the vertical direction, and the break-in head 42 is fixed to the lower end of the sliding bracket 41 and contacts the button of the micro switch to be tested.

[0027] The center line of the clearance hole 11 on the mounting base 10 coincides with the center line of the camshaft 31, ensuring smoothness during transmission. The first connecting part 321 of the connector 33 is located inside the clearance hole 11 and rotates synchronously with the camshaft 31, thereby achieving effective power transmission. The sliding bracket 41 consists of a guide rail 411, a slider 412, and a mounting plate 413. The guide rail 411 is fixed to the side of the mounting base 10, the slider 412 slides with the guide rail 411, the mounting plate 413 is fixed on the slider 412, and the break-in head 42 is mounted on the lower end of the mounting plate 413. A buffer pad 421 is provided at the bottom of the break-in head 42. The buffer pad 421 is made of rubber and has a certain elasticity, which can reduce the impact force on the micro switch button during the break-in process. The position detection component 50 includes a photoelectric sensor 51 and a detection plate 52. The photoelectric sensor 51 is fixed to one side of the mounting base 10, and the detection plate 52 is fixed to one side of the sliding bracket 41. When the sliding bracket 41 moves up and down, the detection plate 52 passes through the detection groove of the photoelectric sensor 51 to monitor the position change of the running head 42 in real time.

[0028] After the drive unit 20 is started, its output shaft drives the camshaft 31 to rotate. The camshaft 31 transmits the rotational motion to the cam 32 through the connector 33. The profile design of the cam 32 allows it to push the running head 42 vertically up and down during rotation, thereby applying periodic pre-pressure to the micro switch button. The guide rail 411 of the sliding bracket 41 cooperates with the slider 412 to ensure the precise vertical movement of the running head 42, avoiding detection errors caused by offset. The introduction of the buffer pad 421 effectively protects the micro switch button, preventing irreversible damage caused by excessive pressure. The photoelectric sensor 51 detects the position change of the detection piece 52 and provides real-time feedback on the movement status of the running head 42, ensuring the accuracy and consistency of the pre-pressure process.

[0029] In actual operation, the micro switch under test is placed in the working area of ​​the mounting base 10, and the buffer pad 421 of the break-in head 42 contacts the button of the micro switch. After the drive unit 20 is started, the camshaft 31 drives the cam 32 to rotate. The contour design of the cam 32 allows it to convert the rotational motion into the linear reciprocating motion of the break-in head 42 through the connecting piece 33 during rotation. The break-in head 42 moves up and down in the vertical direction, applying periodic pre-pressure to the button of the micro switch, simulating the pressing process in actual use. The guide rail 411 of the sliding bracket 41 cooperates with the slider 412 to ensure the linear movement of the break-in head 42, avoiding detection errors caused by tilting or offset. The elasticity of the buffer pad 421 reduces the impact force on the micro switch button during the break-in process, preventing damage caused by excessive pressure. The photoelectric sensor 51 provides real-time feedback on the movement state of the break-in head 42 by detecting the position change of the detection piece 52, ensuring the accuracy and consistency of the pre-pressure process.

[0030] The output shaft of the drive unit 20 passes through the clearance hole 11 on the mounting base 10 and connects to the camshaft 31. The first connecting part 321 is located in the clearance hole 11 and rotates synchronously with the camshaft 31. The second connecting part 322 of the connector 33 is movably connected to one end of the cam 32, and the other end of the cam 32 contacts the upper end of the running head 42. Through the rotational movement of the cam 32, the running head 42 is driven to reciprocate in the vertical direction to achieve pre-pressure running-in of the micro switch button. The guide rail 411 of the sliding bracket 41 is fixed to the side of the mounting base 10, the slider 412 slides with the guide rail 411, the mounting plate 413 is fixed on the slider 412, and the running head 42 is mounted on the lower end of the mounting plate 413. A buffer pad 421 is provided at the bottom of the running head 42. The buffer pad 421 is made of rubber and has a certain elasticity, which can effectively reduce the impact force on the micro switch button during the running-in process and prevent damage caused by excessive pressure. The photoelectric sensor 51 is fixed to one side of the mounting base 10, and the detection plate 52 is fixed to one side of the sliding bracket 41. When the sliding bracket 41 moves up and down, the detection plate 52 passes through the detection groove of the photoelectric sensor 51 to monitor the position change of the running head 42 in real time.

[0031] In the specific implementation process, after the drive unit 20 is started, it drives the cam 32 to rotate via the camshaft 31. The contour design of the cam 32 causes it to push the running head 42 vertically up and down during rotation, thereby applying periodic pre-pressure to the micro switch button. This periodic pre-pressure not only simulates the pressing process in actual use, but also effectively eliminates the initial stress inside the micro switch, improving its service life and stability. The design of the sliding bracket 41 further improves the running accuracy of the mechanism. The cooperation between the guide rail 411 and the slider 412 ensures the linear movement of the running head 42, avoiding detection errors caused by tilting or offset. The introduction of the buffer pad 421 effectively protects the micro switch button, preventing irreversible damage caused by excessive pressure. The addition of the position detection component 50 makes the entire pre-pressure process more controllable. The photoelectric sensor 51 detects the position change of the detection piece 52 and provides real-time feedback on the movement state of the running head 42, thereby ensuring the accuracy and consistency of the pre-pressure process. This design not only improves detection efficiency, but also significantly reduces the need for manual intervention and reduces the possibility of human error.

[0032] Furthermore, the cam 32 transmission assembly 30 also includes a connector 33. The cam 32 includes a first connecting part 321 and a second connecting part 322. The first connecting part 321 and the second connecting part 322 are arranged vertically. The camshaft 31 is fixedly connected to the first connecting part 321. One end of the connector 33 is movably connected to one end of the second connecting part 322, and the other end of the connector 33 is movably connected to the upper end of the running head 42.

[0033] The design of connector 33 enables flexible transmission between camshaft 31 and cam 32, while ensuring reliable connection between cam 32 and running head 42. The fixed connection between the first connecting part 321 and camshaft 31 ensures the stability of power transmission, while the movable connection between the second connecting part 322 and connector 33 allows the running head 42 to move freely up and down under the push of cam 32. This structure not only simplifies the transmission path but also improves the response speed and motion accuracy of the entire mechanism. Under the action of drive unit 20, camshaft 31 drives the first connecting part 321 of cam 32 to rotate, which in turn drives the second connecting part 322 of cam 32 and one end of connector 33 to perform circular motion, thereby driving connector 33 to drive the running head 42 to move linearly up and down, realizing the conversion of rotational motion into linear pre-pressure action of running head 42 on micro switch button, achieving an efficient and stable pre-pressure detection process.

[0034] Furthermore, the first connecting part 321 has a non-circular cross-section connecting hole 3211, the end cross-sectional shape of the camshaft 31 is adapted to the connecting hole 3211, and the camshaft 31 is inserted into the connecting hole 3211.

[0035] The first connecting part 321 has a non-circular cross-section connecting hole 3211. The end shape of the camshaft 31 matches the connecting hole 3211 and is inserted into it, thereby achieving a fixed connection between the camshaft 31 and the connecting member 33. The second connecting part 322 is movably connected to one end of the cam 32, and the other end of the cam 32 contacts the upper end of the running head 42. Through the rotational movement of the cam 32, the running head 42 is driven to reciprocate in the vertical direction, realizing the pre-pressure running-in of the micro switch button.

[0036] Furthermore, the mounting base 10 has a clearance hole 11, the output shaft of the drive unit 20 passes through the clearance hole 11 and is connected to the camshaft 31, and the first connecting part 321 is located in the clearance hole 11 and rotates synchronously with the camshaft 31.

[0037] The first connecting part 321 is located within the clearance hole 11 and rotates synchronously with the camshaft 31, thereby achieving efficient power transmission. The design of the clearance hole 11 not only provides space for the connection between the output shaft of the drive unit 20 and the camshaft 31, but also ensures that the connecting part 33 will not interfere with the mounting base 10 during rotation, guaranteeing the smoothness and reliability of the mechanism's operation. At the same time, this layout also makes the overall structure more compact, saves installation space, and facilitates integration and debugging on the production line. In practical applications, the drive unit 20 transmits power to the camshaft 31 through the output shaft. The camshaft 31 drives the connecting part 33 to rotate, which in turn drives the cam 32 and the running-in head 42 to complete the pre-pressure detection action. The entire process is efficient and stable.

[0038] Furthermore, the sliding bracket 41 includes a guide rail 411, a slider 412, and a mounting plate 413. The guide rail 411 is fixed to the side of the mounting base 10, the slider 412 is slidably engaged with the guide rail 411, the mounting plate 413 is fixed on the slider 412, and the running head 42 is mounted on the lower end of the mounting plate 413.

[0039] The guide rail 411 is fixed to the side of the mounting base 10, the slider 412 slides with the guide rail 411, the mounting plate 413 is fixed on the slider 412, and the running head 42 is mounted on the lower end of the mounting plate 413. The design of the sliding bracket 41 allows the running head 42 to move precisely in the vertical direction, avoiding detection errors caused by offset.

[0040] Furthermore, the bottom of the running head 42 is provided with a buffer pad 421, which is made of rubber.

[0041] The bottom of the break-in head 42 is equipped with a buffer pad 421 made of rubber, which has a certain degree of elasticity and can effectively reduce the impact force on the micro switch button during the break-in process, preventing damage caused by excessive pressure. At the same time, the rubber buffer pad 421 also acts as a shock absorber, reducing vibration and noise generated during the operation of the mechanism and improving the comfort of the testing environment. During the pre-pressure testing process, when the break-in head 42 moves downwards and contacts the micro switch button, the buffer pad 421 first contacts the button and undergoes elastic deformation, absorbing part of the impact force, and then evenly transmits the remaining pressure to the button, ensuring the stability and accuracy of the pre-pressure. This design not only protects the micro switch button but also extends the service life of the break-in head 42 and reduces wear caused by frequent collisions.

[0042] Furthermore, the pre-compression detection mechanism also includes a position detection component 50, which includes a photoelectric sensor 51 located on one side of the sliding bracket 41 and a detection piece 52 fixed on one side of the sliding bracket 41. When the sliding bracket 41 moves up and down, the detection piece 52 passes through the detection groove of the photoelectric sensor 51.

[0043] A photoelectric sensor 51 is fixed to one side of the mounting base 10, and a detection plate 52 is fixed to one side of the sliding bracket 41. When the sliding bracket 41 moves up and down, the detection plate 52 passes through the detection groove of the photoelectric sensor 51, thereby monitoring the position change of the running head 42 in real time. The addition of the position detection component 50 makes the entire pre-pressing process more controllable. The photoelectric sensor 51 detects the position change of the detection plate 52 and provides real-time feedback on the movement state of the running head 42, thereby ensuring the accuracy and consistency of the pre-pressing process. This design not only improves detection efficiency but also significantly reduces the need for manual intervention and the possibility of human error.

[0044] The introduction of the position detection component 50 enables real-time monitoring of the position of the running-in head 42, ensuring the accuracy and reliability of the pre-pressure detection process. The photoelectric sensor 51 is fixed to one side of the sliding bracket 41, while the detection plate 52 is fixed to the other side of the sliding bracket 41 and corresponds to the photoelectric sensor 51. When the sliding bracket 41 moves up and down, the detection plate 52 passes through the detection slot of the photoelectric sensor 51. The photoelectric sensor 51 determines the position of the sliding bracket 41 by detecting the passage of the detection plate 52. This non-contact detection method not only improves detection accuracy but also avoids wear and malfunctions caused by mechanical contact. In practical applications, the position detection component 50 can provide real-time feedback on the position information of the running-in head 42, providing accurate data for the control of the drive unit 20 and ensuring the stability and consistency of the pre-pressure detection process.

[0045] Furthermore, the center line of the camshaft 31 coincides with the center line of the clearance hole 11.

[0046] The centerline of the camshaft 31 coincides with the centerline of the clearance hole 11, ensuring smooth and accurate power transmission. This design prevents the camshaft 31 from becoming eccentric or vibrating during rotation, guaranteeing the stable operation of the cam 32 transmission assembly 30. Simultaneously, the coincident centerline design simplifies the assembly and debugging process, improving production efficiency. In practical applications, this design effectively reduces mechanism failures caused by assembly errors, enhancing the overall reliability and service life of the mechanism.

[0047] Furthermore, the slider 412 and the guide rail 411 are in a sliding fit, while the mounting plate 413 and the slider 412 are in a fixed connection.

[0048] The sliding fit between slider 412 and guide rail 411 ensures the linear motion accuracy of the running head 42, avoiding detection errors caused by tilting or offset. Guide rail 411 is fixed to the side of mounting base 10, providing a stable track for slider 412. The clearance between slider 412 and guide rail 411 is precisely controlled, ensuring smooth sliding of slider 412 while preventing wobbling due to excessive clearance. The fixed connection between mounting plate 413 and slider 412 ensures synchronous movement between the running head 42 and slider 412, allowing the running head 42 to accurately follow the movement of slider 412 up and down. This design not only improves the operating accuracy of the mechanism but also enhances its stability and reliability. In practical applications, the sliding fit between slider 412 and guide rail 411, and the fixed connection between mounting plate 413 and slider 412, work together to ensure accurate pre-pressure detection of the micro switch button by the running head 42.

[0049] This utility model also proposes a micro switch testing machine 100, which includes a pre-pressure detection mechanism. The specific structure of the pre-pressure detection mechanism is as described in the above embodiments. Since this micro switch testing machine 100 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0050] To enable those skilled in the art to fully understand and implement this utility model, the specific implementation principle of this utility model is further explained below in conjunction with a specific application scenario.

[0051] First, place the micro switch to be tested in the working area of ​​the mounting base 10, ensuring that its button is in contact with the buffer pad 421 of the break-in head 42. The buffer pad 421 is made of rubber and has a certain degree of elasticity, which can effectively reduce the impact force on the micro switch button during the break-in process. By adjusting the fixing holes on the mounting base 10, it can adapt to the testing requirements of micro switches of different specifications, thereby ensuring the versatility and flexibility of the testing process.

[0052] Next, the drive unit 20 is activated, and its output shaft drives the camshaft 31 to rotate. Since the end shape of the camshaft 31 matches the non-circular cross-section connecting hole 3211 of the first connecting portion 321 of the connector 33, the rotational motion of the camshaft 31 can be transmitted to the cam 32 through the connector 33. During this process, the first connecting portion 321 of the connector 33 is located within the clearance hole 11 and rotates synchronously with the camshaft 31, ensuring effective power transmission. Simultaneously, the centerline of the camshaft 31 coincides with the centerline of the clearance hole 11, further improving the smoothness of the transmission process.

[0053] As the cam 32 rotates, its contour design allows it to push the running head 42 vertically up and down during rotation. The reciprocating motion of the running head 42 is precisely controlled by the cooperation of the guide rail 411 and the slider 412 on the sliding bracket 41. The guide rail 411 is fixed to the side of the mounting base 10, the slider 412 slides with the guide rail 411, the mounting plate 413 is fixed on the slider 412, and the running head 42 is mounted on the lower end of the mounting plate 413. This structural design ensures the linear motion of the running head 42 and avoids detection errors caused by tilting or offset.

[0054] During the up-and-down movement of the running head 42, the photoelectric sensor 51 monitors the position change of the detection plate 52 in real time. The detection plate 52 is fixed to one side of the sliding bracket 41. When the sliding bracket 41 moves up and down, the detection plate 52 passes through the detection groove of the photoelectric sensor 51, thereby providing feedback on the movement state of the running head 42. Based on the feedback signal from the photoelectric sensor 51, the operating parameters of the drive unit 20 can be adjusted in real time to ensure the accuracy and consistency of the pre-pressing process.

[0055] Furthermore, the contour design of cam 32 not only enables the periodic up-and-down movement of the break-in head 42, but also simulates the pressing process of a microswitch in actual use. This periodic pre-pressure effectively eliminates the initial stress inside the microswitch, improving its service life and stability. At the same time, the elastic properties of the buffer pad 421 reduce the impact force on the microswitch button during the break-in process, preventing damage caused by excessive pressure.

[0056] Throughout the testing process, the addition of the position detection component 50 makes the entire pre-compression process more controllable. The photoelectric sensor 51 detects changes in the position of the detection piece 52 and provides real-time feedback on the movement state of the running-in head 42, thereby ensuring the accuracy and consistency of the pre-compression process. This design not only improves testing efficiency but also significantly reduces the need for manual intervention and minimizes the possibility of human error.

[0057] In summary, in specific application scenarios, this invention achieves efficient pre-pressure break-in testing of micro-switch buttons through the synergistic action of the drive unit 20, cam 32 transmission assembly 30, break-in execution assembly 40, and position detection assembly 50. The precise coordination between the components ensures the stability and reliability of the testing process, while the application of the buffer pad 421 and photoelectric sensor 51 further enhances the safety and controllability of the mechanism. Through the combination of the above steps and principles, those skilled in the art can clearly understand and implement the technical solution of this invention.

[0058] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A pre-compression detection mechanism, characterized in that, include: Mounting base; A drive unit, which is fixedly mounted on one side of the mounting base, is used to provide power output; A cam drive assembly is connected to the output end of the drive unit. The cam drive assembly includes a camshaft and a cam sleeved on the camshaft. The camshaft is in a driving engagement with the drive unit. A break-in execution assembly includes a sliding bracket and a break-in head. The sliding bracket is slidably mounted on the mounting base in a vertical direction. The break-in head is fixed to the lower end of the sliding bracket, and the upper end of the break-in head is connected to the cam.

2. The pre-compression detection mechanism according to claim 1, characterized in that, The cam drive assembly further includes a connector. The cam includes a first connecting part and a second connecting part, which are arranged perpendicularly. The camshaft is fixedly connected to the first connecting part. One end of the connector is movably connected to one end of the second connecting part, and the other end of the connector is movably connected to the upper end of the running head.

3. The pre-compression detection mechanism according to claim 2, characterized in that, The first connecting part has a non-circular cross-section connecting hole, the end cross-section shape of the camshaft is adapted to the connecting hole, and the camshaft is inserted into the connecting hole.

4. The pre-compression detection mechanism according to claim 3, characterized in that, The mounting base has a clearance hole, the output shaft of the drive unit passes through the clearance hole and is connected to the camshaft, and the first connection part is located in the clearance hole and rotates synchronously with the camshaft.

5. The pre-compression detection mechanism according to claim 1, characterized in that, The sliding bracket includes a guide rail, a slider, and a mounting plate. The guide rail is fixed to the side of the mounting base, the slider slides in cooperation with the guide rail, the mounting plate is fixed on the slider, and the break-in head is mounted on the lower end of the mounting plate.

6. The pre-compression detection mechanism according to claim 1, characterized in that, The bottom of the running head is provided with a buffer pad, which is made of rubber.

7. The pre-compression detection mechanism according to claim 1, characterized in that, The pre-compression detection mechanism also includes a position detection component, which includes a photoelectric sensor located on one side of the sliding bracket and a detection plate fixed to one side of the sliding bracket. When the sliding bracket moves up and down, the detection plate passes through the detection slot of the photoelectric sensor.

8. The pre-compression detection mechanism according to claim 4, characterized in that, The centerline of the camshaft coincides with the centerline of the clearance hole.

9. A pre-compression detection mechanism according to claim 5, characterized in that, The slider and the guide rail are in a sliding fit, while the mounting plate and the slider are in a fixed connection.

10. A micro switch testing machine, characterized in that, Includes the pre-pressure testing mechanism as described in any one of claims 1 to 9.

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