Key detection device and method

Abstract

The invention discloses a key detection device and method. The key detection device comprises a jig platform; the clamping detection assembly is mounted on the jig platform, is used for assembling a to-be-detected product and detecting a trigger signal of a to-be-detected key on the product, and is provided with a key punching hole for exposing the to-be-detected key; the penetrating type lead screw motor is fixedly mounted on the jig platform; the penetrating type lead screw is in transmission connection with the penetrating type lead screw motor and is driven by the motor to do linear reciprocating motion; the pressure sensor is mounted at the driving end of the penetrating type lead screw; the keystroke head is mounted on the pressure sensor and axially corresponds to the keystroke hole; the controller is electrically connected with the pressure sensor and the penetrating type lead screw motor and used for receiving a pressure signal of the pressure sensor and controlling the motor to stop when the pressure reaches a set threshold value. The pressure feedback link is direct and high in mechanical rigidity, the response speed to the pressure change is increased, and the high-precision control target of achieving the preset pressure, namely instantaneous stop, can be achieved.

Description

Technical Field

[0001] This invention relates to the field of product testing technology, and in particular to a button testing device and method. Background Technology

[0002] With the widespread application of 3C products, the performance testing requirements for their internal buttons (such as buttons on the circuit boards of various products under test) are increasing. Traditional button testing methods mostly rely on manual operation or simple mechanical pressing, which makes it difficult to accurately control the magnitude and stability of the pressure applied to the button. This results in poor repeatability and low accuracy of test results, and it is difficult to provide accurate and timely pressure data in real time. Especially in specific scenarios such as simulating finger pressing, inaccurate pressure control can easily lead to misjudgment or damage to the product under test.

[0003] Currently, some automated testing equipment exists on the market, but their pressure control mostly relies on time or position control, lacking a real-time pressure feedback mechanism. This makes it difficult to immediately stop the action when the button is pressed to a set value, affecting the accuracy and consistency of the test. Therefore, there is an urgent need for a high-precision testing device and method that can monitor button pressure accurately and without delay in real time, precisely control the pressing action, and stop immediately after reaching the preset pressure, to meet the requirements of high reliability and high efficiency button testing. Summary of the Invention

[0004] The purpose of this invention is to provide a button detection device and method, which aims to solve the problems of low test result accuracy and difficulty in providing accurate and timely pressure data in real time in the existing button detection technology.

[0005] To solve the above-mentioned technical problems, the objective of this invention is achieved through the following technical solution: providing a key detection device, including a fixture platform, a clamping detection component, a through-type lead screw motor, a through-type lead screw, a sliding guide, a pressure sensor, a key press head, and a controller; The clamping and detection component is installed on the fixture platform. The clamping and detection component is used to assemble the product under test and detect the trigger signal of the button under test on the product under test. The clamping and detection component has a key hole for exposing the button under test. The through-type lead screw motor is fixedly installed on the fixture platform; The through-type lead screw is connected to the through-type lead screw motor and performs linear reciprocating motion under the drive of the through-type lead screw motor; The sliding guide is disposed on the fixture platform, and the sliding guide is provided with a slider that moves in a straight line; the slider is connected to the drive end of the through lead screw. The pressure sensor is mounted on the slider; One end of the keying head is mounted on the pressure sensor, and the other end of the keying head corresponds axially to the keying hole; The controller is electrically connected to the pressure sensor and the through-type lead screw motor. The controller is used to receive the pressure signal from the pressure sensor and control the through-type lead screw motor to stop moving when the pressure reaches a set threshold. The motion centerline of the through-type lead screw, the geometric center of the slider, the force center of the pressure sensor, and the pressing center of the key head are all located on the same straight line in the direction of linear motion.

[0006] Furthermore, the fixture platform is provided with a through-hole connecting the top and bottom surfaces; The clamping and detection assembly is installed on the top surface of the fixture platform, and the keyhole is coaxially corresponding to the through guide hole; The bottom surface of the fixture platform is provided with a fixed plate, and the through-type lead screw motor is mounted on the fixed plate. The through-type lead screw, key head, through guide hole and key hole are axially aligned.

[0007] Furthermore, the sliding guide is vertically mounted on the fixed plate, and the sliding guide guides the through-type lead screw to perform linear reciprocating motion via a slider.

[0008] Furthermore, the sliding guide also includes a guide rail; the guide rail is fixed vertically to the fixed plate; the slider is slidably mounted on the guide rail; The slider is rigidly connected to the drive end of the through-type lead screw, the pressure sensor is installed on the top of the slider, and the key head is installed on the top of the pressure sensor.

[0009] Furthermore, the top of the keycap is provided with a pressing protrusion for corresponding to the key to be tested.

[0010] Furthermore, the range of the set threshold is set to 1.1N to 2.1N according to the pressure requirement of the button to be tested.

[0011] Furthermore, the clamping detection assembly includes a base and an upper cover that fits onto the base; The base is mounted on the fixture platform, and a detection cavity is provided on the cover surface of the base. The key hole is opened at the bottom of the base and communicates with the detection cavity. The upper cover has a cover plate on its closing surface. The cover plate is used to press and limit the product to be tested and expose the button to be tested. When the cover plate is closed, the button to be tested is placed in the detection cavity.

[0012] Furthermore, the clamping detection assembly also includes a detection element, which is installed on the base and / or the top cover and is used to detect the trigger signal of the key under test after being pressed by the keycap head.

[0013] This invention also provides a key detection method, applied to the key detection device described above, the key detection method comprising: Place the product under test in the clamping and testing assembly, and align the button to be tested on the product under test with the keyhole. The through-type lead screw motor drives the through-type lead screw to move, thereby moving the pressure sensor and the key head toward the key to be tested; The pressure sensor monitors the pressure signal when the keycap presses the key under test in real time. When the pressure signal from the pressure sensor reaches a set threshold, the through-type lead screw motor is controlled to stop moving. The clamping detection component detects whether the button under test generates a valid trigger signal, and determines whether the button performance is qualified accordingly. Control the through-type lead screw motor to reverse, drive the key head to return to the initial position, open the clamping and detection assembly and take out the product to be tested.

[0014] Furthermore, the criterion for determining whether the button performance is qualified is: whether the button generates a preset trigger signal when the pressure signal of the pressure sensor reaches the set threshold. If it generates a trigger signal, the button performance is qualified; if it does not generate a trigger signal, the button performance is unqualified. The set threshold is set to a range of 1.1N to 2.1N according to the pressure requirement of the button under test.

[0015] The beneficial effects of this invention are as follows: the pressure feedback link is extremely direct and has high mechanical rigidity, fundamentally improving the system's response speed to pressure changes, thereby achieving a high-precision control goal of instantaneous stopping upon reaching the preset pressure. This effectively solves the problems of inaccurate pressure control and poor repeatability caused by traditional time- or position-based control methods, providing a hardware foundation for precise mechanical performance testing of buttons.

[0016] In this embodiment of the invention, the geometric center of the slider, the force center of the pressure sensor, and the pressing center of the key head are located on the same straight line in the direction of linear motion. This ensures that the core action points of the power source, guide component, measuring element, and actuator are precisely configured on the same axis, thus forming a highly compact and rigidly unified motion unit. This configuration ensures that the driving force output by the through-type lead screw can be transmitted to the key head sequentially along an ideal straight path without deflection or loss. It effectively eliminates the interference of lateral force components on the pressure sensor caused by assembly deviations or misalignment of force points, guaranteeing the timeliness and accuracy of the pressure feedback signal. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a first-view schematic diagram of the button detection device provided in an embodiment of the present invention.

[0019] Figure 2 This is a second-view schematic diagram of the button detection device provided in an embodiment of the present invention.

[0020] Figure 3 This is a first-view schematic diagram of the press drive principle in the button detection device provided in an embodiment of the present invention.

[0021] Figure 4 This is a second-view schematic diagram of the press drive principle in the button detection device provided in an embodiment of the present invention.

[0022] Figure 5 for Figure 4 A magnified structural diagram of part A in the middle.

[0023] Figure 6 This is a flowchart illustrating the key detection method provided in an embodiment of the present invention.

[0024] Explanation of the markings in the image: 1. Fixture platform; 11. Through guide hole; 12. Fixing plate; 2. Clamping and testing components; 21. Base; 211. Key hole; 22. Top cover; 23. Cover plate; 3. Through-type lead screw motor; 4. Through-type lead screw; 5. Pressure sensor; 6. Key head; 61. Pressing protrusion; 7. Guide rail; 8. Slider; 9. Product to be tested; 91. Key to be tested. Detailed Implementation

[0025] 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, not all, of the embodiments of the present invention. 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.

[0026] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0027] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0028] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0029] Please see Figures 1 to 5 This invention provides a key detection device, including a fixture platform 1, a clamping detection component 2, a through-type lead screw motor 3, a through-type lead screw 4, a sliding guide, a pressure sensor 5, a key press head 6, and a controller; The clamping and detection component 2 is installed on the fixture platform 1. The clamping and detection component 2 is used to assemble the product under test 9 and detect the trigger signal of the button 91 under test on the product under test 9. The clamping and detection component 2 is provided with a key hole 211 for exposing the button 91 under test. The through-type lead screw motor 3 is fixedly installed on the fixture platform 1; The through-type lead screw 4 is connected to the through-type lead screw motor 3 and performs linear reciprocating motion under the drive of the through-type lead screw motor 3; The sliding guide is mounted on the fixture platform 1, and the sliding guide is equipped with a slider 8 that moves in a straight line; the slider 8 is connected to the drive end of the through lead screw 4. Pressure sensor 5 is mounted on slider 8; One end of the key head 6 is mounted on the pressure sensor 5, and the other end of the key head 6 is axially aligned with the key hole 211. The controller is electrically connected to the pressure sensor 5 and the through-type lead screw motor 3. The controller is used to receive the pressure signal from the pressure sensor 5 and control the through-type lead screw motor 3 to stop moving when the pressure reaches the set threshold. Among them, the motion center line of the through-type lead screw 4, the geometric center of the slider 8, the force center of the pressure sensor 5, and the pressing center of the key head 6 are all located on the same straight line in the direction of linear motion.

[0030] This embodiment uses a through-type lead screw motor 3 as the power source. The motor rotor and the through-type lead screw 4 are either an integral structure or connected via a highly rigid connection. This allows the rotational motion of the through-type lead screw motor 3 to be directly converted into the linear motion of the through-type lead screw 4 without intermediate transmission links. The pressure sensor 5 is rigidly mounted on the slider 8, which in turn is rigidly mounted on the drive end of the through-type lead screw 4. Therefore, the reaction force generated when the keycap 6 presses the button 91 to be tested is sensed in real time through an extremely short and rigid path (i.e., from the keycap 6 to the pressure sensor 5, and then to the lead screw drive end). This directness of the mechanical structure ensures extremely low delay from pressure signal generation to reception by the controller, with almost no elastic deformation or transmission gap to absorb or delay pressure changes. By processing this high-fidelity pressure signal in real time, the controller can issue a stop command to the through-type lead screw motor 3 the instant the pressure reaches the set threshold.

[0031] It is worth noting that, compared with the traditional common drive methods that use "separate rotary motor + coupling + independent lead screw" or "end-driven motor and lead screw (i.e., the motor is at one end of the lead screw)," the integrated mechanism of the through-type lead screw motor 3 and through-type lead screw 4 used in this embodiment has superior technical performance. Traditional methods, due to long transmission chains, elastic deformation, and mechanical backlash, result in delayed pressure feedback signals and idle strokes during braking, limiting the accuracy and repeatability of pressure control. This embodiment, through an extremely short and highly rigid transmission path, achieves near-zero-delay transmission of pressure signals and millisecond-level precise braking, fundamentally solving the key technical problems of real-time pressure feedback and control accuracy.

[0032] It should also be noted that the geometric center of slider 8, the force center of pressure sensor 5, and the pressing center of key head 6 are all located on the same straight line in the direction of linear motion. This ensures that the core action points of the power source, guide components, measuring elements, and actuators are precisely configured on the same axis, thus forming a highly compact and rigidly unified motion unit. This configuration ensures that the driving force output by the through-type lead screw 4 can be transmitted to key head 6 sequentially along an ideal straight path without deflection or loss. This effectively eliminates the interference of lateral force components on pressure sensor 5 caused by assembly deviations or misalignment of force points, ensuring the timeliness and accuracy of pressure feedback signals. At the same time, this highly rigid collinear structure makes the force transmission chain path extremely short and gapless, fundamentally improving the response speed to pressure changes. This provides a reliable hardware foundation for the controller to achieve high-precision control of "instantaneous stop when the pressure reaches the set threshold," and ensures that key head 6 can act perpendicularly on the button under test 91 with the same posture and position in each test, significantly improving the repeatability and reliability of the test results.

[0033] Based on this, because the pressure feedback link in this embodiment is extremely direct and has high mechanical rigidity, the system's response speed to pressure changes is fundamentally improved, thereby achieving the high-precision control goal of instantaneously stopping upon reaching the preset pressure. This effectively solves the problems of inaccurate pressure control and poor repeatability caused by traditional time- or position-based control methods, providing a hardware foundation for precise mechanical performance testing of buttons.

[0034] like Figure 2 As shown, in one embodiment, the fixture platform 1 has a through hole 11 that connects the top surface and the bottom surface; The clamping and detection component 2 is installed on the top surface of the fixture platform 1, and the key hole 211 is coaxially corresponding to the through guide hole 11; The bottom surface of the fixture platform 1 is provided with a fixed plate 12, and the through-type lead screw motor 3 is installed on the fixed plate 12. The through-type lead screw 4, key head 6, through guide hole 11 and key hole 211 are axially corresponding.

[0035] In this embodiment, the spatial layout of the button detection device is specified. Specifically, the fixture platform 1 serves as the reference frame of the device, and its through-hole 11 forms a through-channel between the upper and lower spaces. The clamping detection component 2 is installed on the top surface of the fixture platform 1 to load the product 9 to be tested; while the through-type lead screw motor 3 is installed on the bottom surface of the fixture platform 1 via the fixing plate 12. This layered layout makes the device structure clear and compact, and facilitates the installation, debugging, and maintenance of each component. Crucially, the through-type lead screw 4, the key head 6, the through-hole 11, and the key hole 211 are designed to be axially aligned, meaning that the entire force path from power output to the final point of application is a precisely aligned straight line.

[0036] Based on this, when the through-type lead screw 4 drives the key-pressing head 6 to move upward, the force will pass along the preset axis, sequentially through the through-guide hole 11 and the key-pressing hole 211, and finally act perpendicularly on the center of the key 91 under test. This not only avoids lateral force or bending moment caused by path deviation, protecting the measurement accuracy of the pressure sensor 5 from interference, but also ensures the repeatability and positioning accuracy of the pressing action, making the force conditions highly consistent for each test, greatly improving the reliability and comparability of the test results.

[0037] like Figure 3 and Figure 5 In one embodiment, the sliding guide is disposed on the fixed plate 12 in a vertical direction. The sliding guide is connected to the through lead screw 4 through the slider 8 and is used to guide the through lead screw 4 to perform linear reciprocating motion.

[0038] This embodiment further optimizes the motion stability of the through-type lead screw 4. Specifically, by providing a sliding guide on the fixed plate 12 along the vertical direction and connecting the slider 8 of the sliding guide to the through-type lead screw 4, precise guidance and support are provided for the linear reciprocating motion of the through-type lead screw 4. The sliding guide plays the role of resisting radial force and torque, enabling the through-type lead screw 4 to maintain a predetermined motion trajectory when it performs telescopic motion under the drive of the motor.

[0039] The sliding guide in this embodiment improves the rigidity and smoothness of the entire drive mechanism. During high-speed or high-frequency tests, the guide effectively suppresses vibrations that may occur in the through-type lead screw 4, ensuring that the movement path of the key head 6 is straight and stable.

[0040] In a preferred embodiment of the sliding guide, the sliding guide includes a guide rail 7 and a slider 8; the guide rail 7 is fixed on the fixed plate 12 in the vertical direction; the slider 8 is slidably assembled on the guide rail 7; wherein the slider 8 is connected to the drive end of the through lead screw 4, the pressure sensor 5 is installed on the slider 8, and the key head 6 is installed on the top of the pressure sensor 5.

[0041] In this preferred embodiment of the sliding guide, the bottom of the slider 8 is connected to the drive end of the through-type lead screw 4, thereby directly transmitting the linear thrust of the lead screw to the slider 8. The pressure sensor 5 is securely mounted above the slider 8, and the key head 6 is mounted on top of the pressure sensor 5. In this way, the slider 8, the pressure sensor 5, and the key head 6 form a rigidly connected assembly, which is precisely guided by the guide rail 7 and powered by the through-type lead screw 4.

[0042] In this preferred embodiment of the sliding guide, the cooperation between the guide rail 7 and the slider 8 provides high-precision linear guidance with low friction and smooth operation. The entire force-applying unit (slider 8 - pressure sensor 5 - key head 6) moves as a whole on the guide rail 7, ensuring that the key head 6 moves without wobbling and that its axis remains precisely aligned with the key hole 211 and the through guide hole 11. Simultaneously, the driving force of the through-type lead screw 4 is evenly transmitted through the slider 8, avoiding off-center loading. This ensures that the pressure value measured by the pressure sensor 5 purely reflects the axial pressing force, greatly improving the accuracy and reliability of the pressure feedback signal.

[0043] In one embodiment, the top of the keycap 6 is provided with a pressing protrusion 61 for corresponding to the keycap 91 to be tested.

[0044] In this embodiment, a dedicated pressing protrusion 61 is provided on the top of the keycap 6. The size of the pressing protrusion 61 is much smaller than the cross-sectional area of ​​the keycap 6 body, forming a local contact point. During testing, the pressing protrusion 61 is precisely aligned with and contacts the predetermined trigger area on the keycap 91 under test.

[0045] In this embodiment, the interface conditions for force transmission are optimized by setting a small pressing protrusion 61. Due to the small contact area of ​​the pressing protrusion 61, the contact pressure between the pressing protrusion 61 and the button 91 under test is concentrated, which can more effectively simulate the contact state of actual triggering elements such as fingertips. More importantly, the small contact surface reduces frictional interference caused by uneven contact surfaces or relative sliding, allowing the reaction force from the button feedback to be transmitted to the pressure sensor 5 more concentratedly and directly through the pressing protrusion 61. This helps to obtain a clearer and more accurate pressure trigger signal, especially when detecting precision buttons with short travel and small trigger force; this design can more sensitively capture the true changes in pressure.

[0046] In one embodiment, the range of the threshold value is set to 1.1N to 2.1N based on the pressure requirement of the button 91 to be tested.

[0047] This embodiment specifies a particular numerical range for the threshold value. This threshold is set within a range of 1.1N to 2.1N based on the technical specifications of the button 91 under test (e.g., the trigger force required to simulate finger pressing). This is because, in actual operation, the acceptable trigger force of a button is allowed to fluctuate within a certain range. Setting the threshold as a range allows the control system to immediately trigger a stop command at any moment the pressure signal enters that range. This ensures that each press reaches the minimum force required for effective triggering while avoiding frequent system adjustments or overtravel due to excessive pursuit of a single precise value. This embodiment ensures detection accuracy while also considering testing efficiency and practicality, making the device applicable to various button tests with different pressure specifications.

[0048] In one embodiment, the clamping and testing assembly 2 includes a base 21 and an upper cover 22 that covers the base 21. The base 21 is mounted on the fixture platform 1. A testing cavity is provided on the covering surface of the base 21. A key hole 211 is opened at the bottom of the base 21 and communicates with the testing cavity. A cover plate 23 is provided on the covering surface of the upper cover 22. The cover plate 23 is used to press and limit the product 9 to be tested and expose the button 91 to be tested. When the cover plate 23 is closed, the button 91 to be tested is placed in the testing cavity.

[0049] In this embodiment, the base 21 is fixed to the fixture platform 1 by a positioning and fitting structure. It has an internal testing cavity and a keyhole 211 at the bottom communicating with the testing cavity. The upper cover 22 engages with the base 21 via a fitting surface and has a cover plate 23. During testing, the product under test 9 is placed on the upper cover 22 and pressed and limited to a predetermined position by the cover plate 23. When the upper cover 22 is closed, the button 91 on the product under test 9 is precisely positioned within the testing cavity.

[0050] In this embodiment, the closing structure of the base 21 and the top cover 22 provides a stable and sealed testing environment for the product under test 9. The clamping function of the cover plate 23 prevents the product under test 9 from shifting during the test, ensuring that the positional relationship between the button 91 under test and the keyhole 211 remains constant. The design of the detection cavity provides space for the movement of the key head 6 and guides the pressing action to accurately act on the button. The overall structure realizes quick clamping, accurate positioning and effective protection of the product, which is a key link in achieving efficient and reliable operation in assembly line testing.

[0051] In one embodiment, the clamping detection assembly 2 further includes a detection element, which is mounted on the base 21 and / or the top cover 22 and is used to detect the trigger signal of the key 91 to be tested after being pressed by the key head 6.

[0052] In this embodiment, the detection element is mounted on the base 21 and / or the top cover 22. Its function is to detect in real time whether the key 91 under test has undergone a change in the circuit due to being pressed, i.e., a trigger signal, after the key head 6 has completed pressing and maintained pressure. This signal can be a voltage change, current on / off, or a specific digital signal.

[0053] In this embodiment, while precisely controlling the mechanical pressing action through the pressure sensor 5, the device simultaneously acquires the electrical response of the button through the detection element. This integrated design enables the system to simultaneously determine two key indicators, "whether the pressing pressure is accurate" and "whether the button's electrical function is qualified," in a coherent process, thereby making a comprehensive and rapid qualification judgment on the button's performance.

[0054] like Figure 6 As shown, this embodiment of the invention also provides a key detection method, applied to the key detection device described above, the key detection method including steps S601-S606.

[0055] S601. Place the product under test 9 in the clamping and testing assembly 2, and align the button 91 on the product under test 9 with the keyhole 211. S602, The through-type lead screw motor 3 drives the through-type lead screw 4 to move, which in turn drives the pressure sensor 5 and the key head 6 to move towards the key to be tested 91; S603, The pressure signal when the keycap 6 presses the key 91 to be tested is monitored in real time by the pressure sensor 5; S604. When the pressure signal of the pressure sensor 5 reaches the set threshold, control the through-type lead screw motor 3 to stop moving. S605. The clamping detection component 2 detects whether the button 91 under test generates a valid trigger signal, and determines whether the button performance is qualified accordingly. S606, control the through-type lead screw motor 3 to reverse, drive the key head 6 to return to the initial position, open the clamping and detection assembly 2 and take out the product to be tested 9.

[0056] The core step of this embodiment is to drive the key press head 6 to perform key pressing by a through-type lead screw motor 3. During this process, the pressure sensor 5 monitors the force in real time. When the monitored pressure value reaches a preset threshold, the core control logic is triggered to immediately interrupt the drive of the through-type lead screw motor 3, causing the pressing action to stop momentarily and remain in place. Subsequently, while maintaining the pressure, the clamping detection component 2 detects the electrical trigger signal of the key, and finally determines the key performance based on this signal, completing the reset.

[0057] This embodiment implements a closed-loop, high-precision automated testing process. It combines real-time force sensing with instantaneous motion control, replacing traditional simple open-loop control, such as control based solely on time or position. The core advantage of this embodiment is that the stopping of the press is not based on a preset time or distance traveled, but on the actual reaction force given by the button being tested. This ensures that each press stops under exactly the same mechanical conditions. This guarantees the consistency of testing conditions, resulting in more accurate and reliable test results.

[0058] In one embodiment, the criterion for determining whether the button performance is qualified is: whether the button generates a preset trigger signal when the pressure signal of the pressure sensor 5 reaches a set threshold. If it generates a trigger signal, the button performance is qualified; if it does not generate a trigger signal, the button performance is unqualified. The set threshold is set to a range of 1.1N to 2.1N according to the pressure requirement of the button 91 to be tested.

[0059] In this embodiment, the judgment logic and threshold setting criteria for the button detection method are specifically defined. The direct criterion for judging whether the button performance is qualified is: at the moment when the pressure signal reaches the set threshold (e.g., 1.1N-2.1N), whether the pressed button 91 synchronously generates a preset trigger signal. If a valid electrical signal is triggered when the specified pressure is reached, it is judged as qualified; otherwise, if the pressure signal has reached the standard but no electrical signal is generated, it is judged as unqualified. The set threshold here is directly related to the technical requirements of the button 91 under test.

[0060] Based on this, this embodiment establishes clear and objective qualification criteria. The results of mechanical calibration and functional testing are logically linked; a product is only deemed qualified if both mechanical conditions and electrical functions are simultaneously met. This method eliminates misjudgments caused by inaccurate pressure control (such as false triggering due to insufficient pressure or false triggering due to damage from excessive pressure), ensuring that test conclusions are entirely based on the product's actual performance under standard stress conditions. This significantly enhances the authority and accuracy of the test results, providing a solid and reliable basis for product quality control.

[0061] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A key detection device, characterized in that, include: Jig platform; A clamping and detection component is installed on the fixture platform for assembling the product under test and detecting the trigger signal of the button under test on the product under test. The clamping and detection component is provided with a key hole for exposing the button under test. A through-type lead screw motor is fixedly installed on the fixture platform; A through-type lead screw is connected to the through-type lead screw motor and performs linear reciprocating motion under the drive of the through-type lead screw motor; A sliding guide is disposed on the fixture platform, and the sliding guide is provided with a slider that moves in a straight line; the slider is connected to the drive end of the through-type lead screw; A pressure sensor is mounted on the slider; The key head is mounted on the pressure sensor at one end and axially aligned with the key hole at the other end. The controller is electrically connected to the pressure sensor and the through-type lead screw motor, and is used to receive the pressure signal from the pressure sensor and control the through-type lead screw motor to stop moving when the pressure reaches a set threshold. The motion centerline of the through-type lead screw, the geometric center of the slider, the force center of the pressure sensor, and the pressing center of the key head are all located on the same straight line in the direction of linear motion.

2. The key detection device according to claim 1, characterized in that, The fixture platform has a through-hole connecting the top and bottom surfaces; The clamping and detection assembly is installed on the top surface of the fixture platform, and the keyhole is coaxially corresponding to the through guide hole; The bottom surface of the fixture platform is provided with a fixed plate, and the through-type lead screw motor is mounted on the fixed plate. The through-type lead screw, key head, through guide hole and key hole are axially aligned.

3. The button detection device according to claim 2, characterized in that, The sliding guide is vertically mounted on the fixed plate, and the sliding guide guides the through-type lead screw to perform linear reciprocating motion via a slider.

4. The button detection device according to claim 3, characterized in that, The sliding guide also includes: The guide rail is fixed vertically to the fixed plate; the slider is slidably mounted on the guide rail. The slider is rigidly connected to the drive end of the through-type lead screw, the pressure sensor is installed on the top of the slider, and the key head is installed on the top of the pressure sensor.

5. The key detection device according to claim 2, characterized in that, The top of the keycap has a raised dot for pressing the corresponding key to be tested.

6. The key detection device according to claim 1, characterized in that, The range of the set threshold is set to 1.1N to 2.1N based on the pressure requirement of the button to be tested.

7. The key detection device according to claim 1, characterized in that, The clamping detection assembly includes a base and an upper cover that fits onto the base; The base is mounted on the fixture platform, and a detection cavity is provided on the cover surface of the base. The key hole is opened at the bottom of the base and communicates with the detection cavity. The upper cover has a cover plate on its closing surface. The cover plate is used to press and limit the product to be tested and expose the button to be tested. When the cover plate is closed, the button to be tested is placed in the detection cavity.

8. The key detection device according to claim 7, characterized in that, The clamping detection assembly further includes a detection element, which is installed on the base and / or the top cover and is used to detect the trigger signal of the key under test after being pressed by the keycap.

9. A key detection method, characterized in that, The button detection method, applied to the button detection device according to any one of claims 1 to 8, comprises: Place the product under test in the clamping and testing assembly, and align the button to be tested on the product under test with the keyhole. The through-type lead screw motor drives the through-type lead screw to move, thereby moving the pressure sensor and the key head toward the key to be tested; The pressure sensor monitors the pressure signal when the keycap presses the key under test in real time. When the pressure signal from the pressure sensor reaches a set threshold, the through-type lead screw motor is controlled to stop moving. The clamping detection component detects whether the button under test generates a valid trigger signal, and determines whether the button performance is qualified accordingly. Control the through-type lead screw motor to reverse, drive the key head to return to the initial position, open the clamping and detection assembly and take out the product to be tested.

10. The button detection method according to claim 9, characterized in that, The criterion for determining whether the button performance is qualified is: whether the button generates a preset trigger signal when the pressure signal of the pressure sensor reaches the set threshold. If it generates a trigger signal, the button performance is qualified; if it does not generate a trigger signal, the button performance is unqualified. The set threshold is set to a value of 1.1N to 2.1N according to the pressure requirement of the button under test.

Images