Spring elasticity detection mechanism and spring detection device for smart watch

Abstract

The application relates to the technical field of spring detection, in particular to a spring elasticity detection mechanism and a spring detection equipment for smart watches, which comprises a linear driving assembly and a detection shell; a laser range finder, a pressing cylinder, a pressure plate, a pressure sensor and a lifting unit are arranged on the detection shell; the laser range finder is vertically arranged at the upper portion of the detection shell and the ranging end vertically faces downward; the pressing cylinder is movably arranged below the laser range finder in the vertical direction, and the pressing cylinder is used for pressing the button when the pressing cylinder is lowered; the pressure plate is arranged above the pressing cylinder and has a ring structure, a ring groove is formed in the periphery of the pressure plate, the upper portion of the pressing cylinder is sleeved in the ring groove, and a gap is formed between the upper portion of the pressing cylinder and the upper portion of the ring groove; the pressure sensor is arranged in the gap; and the lifting unit is arranged at the upper portion of the pressure plate and is used for driving the pressure plate to ascend and descend. The application greatly shortens the detection period and effectively improves the detection efficiency.

Description

Technical Field

[0001] This invention relates to the field of spring testing technology, specifically to a spring elasticity testing mechanism and a spring testing device for smartwatches. Background Technology

[0002] After the springs are manufactured, they need to be tested for elasticity to ensure that the springs meet the requirements. The requirements for testing vary for different springs, but the springs need to be positioned before testing to ensure the accuracy of the subsequent test results.

[0003] Chinese Patent Publication No. CN112903221B discloses a conveniently positioned spring force testing device for spring testing, including a test box. A positioning mechanism is provided in the lower middle region of the test box. The positioning mechanism includes a positioning plate, a fixed slide block, a fixing screw, a movable correction block, a test column, a movable block, a first slider, a fixed slide frame, a first screw, a support block, a first turntable, and a test guide rod. The positioning plate is located in the lower middle region of the test box. A fixed slide block is located near one end of the upper part of the positioning plate. A fixing screw is located inside the fixing groove at one end of the fixed slide block. The other end of the fixed slide block... A movable calibration block is provided at one end, and a test column is provided inside the movable calibration block. A movable block is provided at one end of the movable calibration block, and a first slider is provided at the front end of the movable block. A fixed slide frame is provided at the front end of the first slider and the outer side of the movable block at the upper end of the positioning plate. A first screw is provided at one end of the movable block, and a support block is provided on the side of the upper end of the positioning plate near the fixed slide frame on the outer surface of the first screw. A first turntable is provided at one end of the first screw. A test guide rod is provided at the upper end of the test column. A CCD detector is provided at the upper end of the test box, and a test spring is provided at the lower end of the outer surface of the test guide rod.

[0004] The above solution improves testing speed by quickly locating the spring. When testing watch springs, the spring is usually pre-installed in the watch components, and the watch components are placed on a special fixture during testing to ensure accurate positioning. Positioning is primarily done by a robotic arm. The main test for the spring is its maximum elastic force. Some high-end watches also test the spring's rebound time. An excessively long rebound time can make the buttons feel sluggish to the user, while an excessively short rebound time can lead to false triggering. Current technology typically requires two testing stations to separately test the spring's maximum elastic force and rebound time, resulting in low testing efficiency. Summary of the Invention

[0005] To address the aforementioned issues, a spring elasticity testing mechanism and a spring testing device for smartwatches are provided. By integrating components such as a laser rangefinder, a pressure cylinder, a pressure sensor, and a lifting unit, this spring elasticity testing mechanism achieves simultaneous detection of the maximum elastic force and button reset time of a watch button spring in a single station and a single contact. It utilizes the lifting unit to drive the pressure plate downwards, and the pressure sensor accurately captures the pressure changes during button pressing to obtain the maximum elastic force value, avoiding the positioning inaccuracies caused by direct drive components and ensuring testing accuracy. During button reset, the laser rangefinder monitors and records the reset time in real time, eliminating the need for secondary positioning and relocation.

[0006] To address the problems of the prior art, the present invention provides a spring elasticity detection mechanism for detecting the pressure of a spring at the bottom of a watch button. The detection mechanism includes a linear drive assembly and a detection housing.

[0007] The detection housing is equipped with a laser rangefinder, a pressure cylinder, a pressure plate, a pressure sensor, and a lifting unit.

[0008] The laser rangefinder is vertically mounted on the upper part of the detection housing with the measuring end facing downwards. The measuring end forms a detection path when detecting the lifting distance of the button.

[0009] The pressure cylinder moves vertically and is positioned below the laser rangefinder. When the pressure cylinder descends, the button is pressed, and the detection path runs through the center of the pressure cylinder.

[0010] The pressure plate is positioned above the lower pressure cylinder and has an annular structure. An annular groove is formed around the pressure plate. The upper part of the lower pressure cylinder is fitted into the annular groove. There is a gap between the upper part of the lower pressure cylinder and the upper part of the annular groove. A pressure sensor is installed in the gap.

[0011] The lifting unit is located on the upper part of the pressure plate and is used to drive the pressure plate to rise and fall.

[0012] Preferably, the lifting unit includes a rotating ring, a lowering block, a weight, and a traction assembly;

[0013] The rotating ring is positioned above the pressure plate and rotates along the axis of the pressure plate.

[0014] The lower pressure block is fixedly installed at the lower part of the rotating ring. The two sides of the lower pressure block are respectively a sloping structure and a vertical structure. The lower end of the lower pressure block and the lower end of the rotating ring together form a guide end face for guiding the pressure plate to rise and fall.

[0015] The weight is placed vertically on one side of the pressure plate;

[0016] The two ends of the traction assembly are connected to the weight and the pressure plate, respectively.

[0017] Preferably, the traction assembly includes a pulley and a traction rope;

[0018] The rotating wheel is positioned above the pressure plate;

[0019] The two ends of the traction rope are fixedly connected to the pressure plate and the weight, respectively, and the traction rope is wound around the upper part of the wheel.

[0020] Preferably, a roller that rolls with the guide end face is rotatably provided on the upper part of the pressure plate.

[0021] Preferably, a stop line is provided on the sloping structure of the pressing block. The straight-line distance between the stop line and the lower end face of the pressing block in the vertical direction is called the first pressing distance. The maximum pressing distance when the button is pressed is called the second pressing distance. The first pressing distance and the second pressing distance are equal.

[0022] Preferably, a guide rod is vertically inserted through the weight, and the guide rod slides with the weight.

[0023] Preferably, the pressure cylinder is made of a lightweight, high-strength material.

[0024] Preferably, a light-shielding cylinder is vertically slidably provided at the lower part of the pressure cylinder.

[0025] Preferably, a pressing head is provided at the lower part of the pressing cylinder, and the lower part of the pressing head is provided with a chamfer.

[0026] The present invention also relates to a spring testing device for smartwatches, comprising a spring elasticity testing mechanism, a feeding mechanism, and a discharging mechanism.

[0027] The advantages of this invention compared to the prior art are:

[0028] 1. This invention, by integrating components such as a laser rangefinder, a pressure cylinder, a pressure sensor, and a lifting unit, enables the simultaneous detection of the maximum elastic force of a watch button spring and the button reset time in a single station and a single contact. It utilizes the lifting unit to drive the pressure plate downwards, and the pressure sensor accurately captures the pressure changes during button pressing to obtain the maximum elastic force value, avoiding the positioning inaccuracies caused by direct drive components and ensuring detection accuracy. During button reset, the laser rangefinder monitors and records the reset time in real time, eliminating the need for secondary positioning and transfer. Compared to existing detection methods requiring two independent stations, this significantly shortens the detection cycle, effectively improves detection efficiency, and is more suitable for the testing needs of large-scale watch production.

[0029] 2. By setting a pressure block with sloping and vertical structures on both sides, the movement speed and distance of the pressure plate under different detection requirements are controlled. The sloping structure guides the pressure plate downward, enabling the pressure cylinder to move slightly, ensuring that the pressing distance of the pressure cylinder matches the pressing stroke of the button. In addition, setting the other side of the pressure block as a vertical structure ensures that the pressure cylinder can be quickly withdrawn from the button when the laser rangefinder measures the button reset time, ensuring the accuracy of the measurement results. Attached Figure Description

[0030] Figure 1 This is a three-dimensional schematic diagram of the spring detection device for smartwatches of the present invention, excluding the feeding and unloading mechanisms.

[0031] Figure 2 This is a three-dimensional schematic diagram of a spring elasticity detection mechanism of the present invention in the detection state.

[0032] Figure 3 This is a side view of a spring elasticity detection mechanism according to the present invention.

[0033] Figure 4 This invention relates to a spring elasticity detection mechanism. Figure 3 Schematic diagram of cross-section at point AA.

[0034] Figure 5 This invention relates to a spring elasticity detection mechanism. Figure 4 A magnified view of a portion of point B in the middle.

[0035] Figure 6 This is a cross-sectional three-dimensional schematic diagram of a spring elasticity detection mechanism according to the present invention.

[0036] Figure 7 This invention relates to a spring elasticity detection mechanism. Figure 6 A magnified view of a portion of point C.

[0037] Figure 8 This invention relates to a spring elasticity detection mechanism. Figure 6 A magnified view of a portion of point D.

[0038] Figure 9 This is a three-dimensional schematic diagram of a spring elasticity detection mechanism of the present invention after the linear drive component has been removed.

[0039] Figure 10 This is a cross-sectional three-dimensional schematic diagram of a spring elasticity detection mechanism of the present invention after the linear drive component has been removed.

[0040] Figure 11 This invention relates to a spring elasticity detection mechanism. Figure 10 A magnified view of a portion of point E in the middle.

[0041] Figure 12 This is a three-dimensional schematic diagram of a spring elasticity detection mechanism of the present invention after removing the detection shell and the linear drive assembly.

[0042] Figure 13 This is a three-dimensional schematic diagram of a spring elasticity detection mechanism of the present invention after removing the pressure cylinder, detection shell and linear drive assembly.

[0043] The following are the labels in the diagram: 1. Linear drive assembly; 2. Detection housing; 21. Laser rangefinder; 22. Pressing cylinder; 221. Light shielding cylinder; 222. Pressing head; 23. Pressure plate; 231. Roller; 24. Pressure sensor; 25. Lifting unit; 251. Rotating ring; 2511. Gear ring; 2512. Gear; 2513. Micro motor; 252. Pressing block; 253. Weight; 2531. Guide rod; 254. Traction assembly; 2541. Rotating wheel; 2542. Traction rope; 255. Stop line; 3. Button; 31. Spring. Detailed Implementation

[0044] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0045] Reference Figures 1-6 and Figure 11 A spring elasticity detection mechanism is used to detect the pressure of the spring 31 at the bottom of the watch button 3. The detection mechanism includes a linear drive assembly 1 and a detection shell 2.

[0046] A laser rangefinder 21, a pressure cylinder 22, a pressure plate 23, a pressure sensor 24, and a lifting unit 25 are installed on the detection housing 2;

[0047] The laser rangefinder 21 is vertically mounted on the upper part of the detection housing 2 with the measuring end facing downwards. When the measuring end detects the distance of the lifting and lowering button 3, a detection path is formed.

[0048] The pressure cylinder 22 moves vertically and is positioned below the laser rangefinder 21. When the pressure cylinder 22 descends, it presses the button 3. The detection path passes through the center of the pressure cylinder 22.

[0049] The pressure plate 23 is positioned above the lower pressure cylinder 22 and has an annular structure. An annular groove is provided around the pressure plate 23. The upper part of the lower pressure cylinder 22 is fitted into the annular groove. There is a gap between the upper part of the lower pressure cylinder 22 and the upper part of the annular groove. A pressure sensor 24 is installed in the gap.

[0050] The lifting unit 25 is located on the upper part of the pressure plate 23 and is used to drive the pressure plate 23 to rise and fall.

[0051] In existing spring elasticity testing mechanisms, when testing watch springs 31, the spring 31 needs to be pre-integrated into watch components, such as movement parts or linkage transmission components containing buttons 3. During assembly, specialized tooling is required to ensure that parameters such as installation angle and pre-compression are compliant, avoiding impact on subsequent testing. The main testing item is the maximum elasticity test, i.e., the elasticity of the spring 31 when button 3 is fully pressed. The equipment compresses the spring 31 to its maximum stroke at a set speed, and the sensor records the elasticity change curve to determine the maximum value. Incorrect elasticity will affect the feel and durability of button 3. In some high-end watches, the spring 31's rebound speed also needs to be tested, i.e., the rebound time of button 3 needs to be measured. If the rebound time of button 3 is too long, it will feel sluggish during use; if the rebound time is too short, it is prone to accidental triggering. However, in existing technology, these two tests require two independent workstations. After completing one test, the component needs to be transferred to the other workstation and repositioned, which is both time-consuming and inefficient, making it difficult to meet the needs of large-scale production.

[0052] To improve testing efficiency, the existing spring elasticity testing mechanism was optimized. This allows the spring elasticity testing mechanism in this application to detect the maximum pressure of the spring 31 and the reset time of the button 3 with only one contact at a single station, thus improving testing efficiency. The specific structure and working process of this invention are as follows:

[0053] The linear drive assembly 1 is used to drive the detection housing 2. The linear drive assembly 1 can be selected from electric push rods, ball screw modules or slides, etc., according to the actual situation. During testing, the assembly containing button 3 and spring 31 is first placed in a fixture. The fixture then moves the assembly to the testing position, directly below the spring elasticity testing mechanism. Subsequently, the linear actuator assembly first drives the testing shell 2 to descend, and the pressure cylinder 22 descends synchronously with the testing shell 2. The lower end of the pressure cylinder 22 is equipped with a pressing head 222, which has a ring structure. When the pressing head 222 contacts the button 3, the linear actuator assembly 1 stops driving. The stopping position of the pressing head 222 after it descends can be preset in advance. Then, the lifting unit 25 starts driving the pressure plate 23 to continue descending. This is because when the linear actuator assembly 1 drives the testing shell 2 to descend, the pressing distance of the button 3 has a large play, which may result in insufficient pressing or excessive pressing distance, leading to inaccurate test results or damage to the button 3 after testing. The lifting unit 25 can drive the pressure cylinder 22 to rise and fall more stably, reducing play during the rise and fall. The specific structure of the lifting unit 25 is described below. Since the pressure cylinder 22 is fitted onto the annular groove of the pressure plate 23, the pressure cylinder 22 and the pressure plate 23 slide in the vertical direction. When the lifting unit 25 drives the pressure plate to descend, the pressure plate presses the button 3 through the pressure sensor 24 and the pressure cylinder 22. As the button 3 is pressed down, the pressure sensor 24 detects the pressure change in real time. The stroke of the button 3 from its highest point to its lowest point is called the rated travel stroke. When the descending distance of the pressure cylinder 22 is the same as the rated travel stroke, the pressure cylinder 22 stops moving, and the button 3... After being fully pressed down, the pressure sensor 24 detects the maximum pressure value, thus completing the detection of the maximum elastic force value of the spring 31. Subsequently, the lifting unit 25 drives the pressure plate 23 to rise rapidly, causing the lower pressure cylinder 22 to quickly detach from the top of the button 3. The button 3 resets under the action of the spring 31. During this process, the laser rangefinder 21 monitors the reset process of the button 3 and records the reset time of the button 3. In this way, by pressing in sequence, the maximum elastic force value of the spring 31 and the reset time of the button 3 can be detected, improving the detection efficiency.

[0054] By integrating components such as a laser rangefinder 21, a pressure cylinder 22, a pressure sensor 24, and a lifting unit 25, this spring elasticity detection mechanism achieves simultaneous detection of the maximum elastic force of the watch button 3 spring 31 and the button 3 reset time in a single station and a single contact. It uses the lifting unit 25 to drive the pressure plate 23 downwards, and the pressure sensor 24 accurately captures the pressure changes during the button 3 being pressed to obtain the maximum elastic force value, avoiding the positioning inaccuracies caused by direct drive from the linear drive component 1, thus ensuring detection accuracy. When the button 3 resets, the laser rangefinder 21 monitors and records the reset time in real time, eliminating the need for secondary positioning and transfer. Compared to existing detection methods requiring two independent stations, this significantly shortens the detection cycle, effectively improves detection efficiency, and is more suitable for the detection needs of large-scale watch production.

[0055] Reference Figure 7 , Figure 9 , Figure 10 , Figure 12 and Figure 13 The lifting unit 25 includes a rotating ring 251, a pressing block 252, a weight 253, and a traction assembly 254.

[0056] The rotating ring 251 is rotatably positioned above the pressure plate 23 along the axis of the pressure plate 23;

[0057] The lower pressure block 252 is fixedly installed at the lower part of the rotating ring 251. The two sides of the lower pressure block 252 are respectively a sloping structure and a vertical structure. The lower end of the lower pressure block 252 and the lower end of the rotating ring 251 together form a guide end face for guiding the pressure plate 23 to rise and fall.

[0058] The weight 253 is vertically mounted on one side of the pressure plate 23;

[0059] The two ends of the traction assembly 254 are connected to the weight 253 and the pressure plate 23, respectively.

[0060] The weight 253, under its own weight, always generates a downward vertical force. The weight 253, through the traction assembly 254, always exerts an upward pulling force on the pressure plate 23. A roller 231 is rotatably mounted on the upper part of the pressure plate 23. Under the action of the weight 253, the roller 231 on the upper part of the pressure plate 23 is always in contact with the guide end face. When the rotating ring 251 rotates, the roller 231 rolls against the guide end face. Furthermore, the lower pressure cylinder 22 can only move vertically and will not rotate around its own axis. Since the two sides of the lower pressure block 252 are respectively... With both sloping and vertical structures, as the rotating ring 251 rotates, the sloping side of the pressing block 252 moves towards the roller 231. When the sloping structure moves above the roller 231, it exerts a downward pressure on the roller 231 as the rotating ring 251 continues to rotate. After the roller 231 passes the sloping structure of the pressing block 252, it rolls against the lower end face of the pressing block 252, at which point the pressing cylinder 22 fully presses down the button 3. At this time, the pressure sensor 24 can detect the force generated by the spring 31. During the detection process, the rotating ring 251 continues to rotate. When the vertical side of the pressing block 252 rotates above the roller 231, the roller 231 rises rapidly under the traction of the weight 253 and the traction component 254, causing the pressure plate 23 to quickly withdraw the pressing cylinder 22 from the button 3. Simultaneously, the laser rangefinder 21 detects the reset process of the button 3 in real time and records the reset time of the button 3.

[0061] A gear ring 2511 is fixedly installed on the upper part of the rotating ring 251 along the axis of the rotating ring 251. A gear 2512 is rotatably installed on one side of the gear ring 2511. The gear 2512 meshes with the gear ring 2511. A micro motor 2513 is vertically installed on the upper part of the gear 2512. The micro motor 2513 is used to drive the gear 2512 to rotate.

[0062] By setting the pressure block 252 with a sloping structure on one side and a vertical structure on the other, the movement speed and distance of the pressure plate 23 under different detection requirements are controlled. The sloping structure guides the pressure plate 23 to descend, which pushes the pressure cylinder 22 to move slightly, ensuring that the pressing distance of the pressure cylinder 22 matches the pressing stroke of the button 3. In addition, setting the other side of the pressure block 252 as a vertical structure ensures that when the laser rangefinder 21 measures the reset time of the button 3, the pressure cylinder 22 can be quickly withdrawn from the button 3, ensuring the accuracy of the measurement results.

[0063] Reference Figure 5 , Figure 7 and Figure 12 The traction assembly 254 includes a pulley 2541 and a traction rope 2542;

[0064] The rotating wheel 2541 is positioned above the pressure plate 23;

[0065] The two ends of the traction rope 2542 are fixedly connected to the pressure plate 23 and the weight 253 respectively, and the traction rope 2542 is wound around the upper part of the wheel 2541.

[0066] The weight 253 exerts a vertical upward pulling force on the pressure plate 23 through the traction rope 2542.

[0067] Reference Figure 13 A roller 231 is rotatably mounted on the upper part of the pressure plate 23, which rolls in cooperation with the guide end face.

[0068] By setting rollers 231 on the upper part of pressure plate 23, pressure plate 23 can roll with guide end face through rollers 231, reducing wear when rotating ring 251 rotates.

[0069] Reference Figure 13 A stop line 255 is provided on the sloping structure of the pressing block 252. The straight distance between the stop line 255 and the lower end face of the pressing block 252 in the vertical direction is called the first pressing distance. The maximum pressing distance when the button 3 is pressed is called the second pressing distance. The first pressing distance and the second pressing distance are equal.

[0070] Before testing, the rotating ring 251 drives the pressing block 252 to rotate, so that the sloping structure of the pressing block 252 presses the roller 231. When the roller 231 rolls to the stop line 255, it stops rotating. Then, the linear drive assembly 1 drives the detection shell 2 to descend, so that the pressing head 222 located at the lower part of the pressing cylinder 22 contacts the upper part of the button 3. Then the rotating ring 251 continues to rotate, so that the pressing block 252 continues to press down on the roller 231. Since the first pressing distance and the second pressing distance are equal, the pressing amount of the button 3 is not too large or too small. This ensures that the pressure sensor 24 can detect the maximum pressure value of the spring 31, and also avoids the button 3 being damaged due to excessive pressure when pressing it.

[0071] Reference Figure 7 A guide rod 2531 is vertically inserted through the weight 253, and the guide rod 2531 slides with the weight 253.

[0072] The guide rod 2531 is used to guide the heavy object 253 and prevent the heavy object 253 from swaying during lifting and lowering.

[0073] Reference Figures 1-13 The pressure cylinder 22 is made of lightweight, high-strength material.

[0074] Materials such as titanium alloy cylindrical structure materials, aluminum-lithium alloy cylindrical structure materials, magnesium alloy cylindrical structure materials, carbon fiber reinforced resin matrix composite materials, and glass fiber reinforced composite materials are used to ensure that the lower pressure cylinder 22 is relatively lightweight, and the heavy object 253 can quickly drive the pressure plate 23 and the lower pressure cylinder 22 to rise.

[0075] Reference Figure 8 and Figure 11 A light-shielding cylinder 221 is vertically slidably installed at the lower part of the pressure cylinder 22.

[0076] The light-shielding tube 221 is made of a black, light-shielding, lightweight material. It can slide freely in the vertical direction. When the pressing head 222 contacts the button 3, the lower part of the light-shielding tube 221 contacts the button 3. Because the mass of the light-shielding tube 221 is light and constant, its mass can be ignored or included in the final pressure sensor 24 detection result during testing. After the pressing head 222 finishes pressing the button 3, it rises under the action of the lower pressing cylinder 22, while the light-shielding tube 221 remains in contact with the button 3. When the button 3 resets under the action of the spring 31, the light-shielding tube 221 rises along with the button 3. The purpose of setting up the light-shielding tube 221 is that some buttons 3, due to their external coating or material, are easily affected by ambient light when detected by the laser rangefinder 21, resulting in lower accuracy in detecting the button 3's reset time. Setting up the light-shielding tube 221 avoids this situation.

[0077] Reference Figure 11 and Figure 12 A pressing head 222 is provided at the lower part of the pressing cylinder 22, and the lower part of the pressing head 222 is chamfered.

[0078] The press head 222 is made of polyoxymethylene material, which prevents the button 3 from being scratched or indented when it is pressed. In addition, due to the high hardness of polyoxymethylene material, it will not be elastically deformed and has strong wear resistance, which extends the subsequent maintenance cycle, reduces the workload, and also reduces the impact on the detection results of the pressure sensor 24.

[0079] Reference Figures 1-13 The present invention also relates to a spring testing device for smartwatches, comprising a spring elasticity testing mechanism, a feeding mechanism, and a discharging mechanism.

[0080] Working principle: When the spring elasticity detection mechanism is working, the assembly with button 3 and spring 31 is first placed in the fixture and moved to the detection position. The linear drive assembly 1 drives the detection housing 2 to descend, so that the pressing head 222 of the pressing cylinder 22 contacts the button 3 and stops. At this time, the roller 231 is on the stop line 255 on the pressing block 252, and then the lifting unit 25 is started.

[0081] In the lifting unit 25, the micro motor 2513 drives the gear 2512 to rotate the gear ring 2511 and the rotating ring 251, and the lower pressure block 252 at the bottom of the rotating ring 251 rotates accordingly. Under the pulling force of the weight 253 on the pressure plate 23 through the traction component 254, the upper roller 231 of the pressure plate 23 is always in contact with the guide end face. The rotating lower pressure block 252 pushes the roller 231 and the pressure plate 23 down. The pressure plate 23 drives the lower pressure cylinder 22 to press down the button 3 through the pressure sensor 24. The pressure sensor 24 captures the pressure change in real time. When the button 3 is fully pressed down, the pressure sensor 24 measures the maximum elastic force value.

[0082] After the test is completed, the rotating ring 251 continues to rotate. When the vertical structure of the pressure block 252 turns to the roller 231, the roller 231 rises rapidly under the traction of the weight 253, causing the pressure plate 23 and the lower pressure cylinder 22 to retract from the button 3. The button 3 then resets under the action of the spring 31. During this process, the laser rangefinder 21 monitors the reset process of the button 3 along the detection path that passes through the center of the lower pressure cylinder 22, and records the time required for the reset, thus completing a single test.

[0083] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A spring elasticity detection mechanism for detecting the pressing of a lower spring (31) of a watch key (3), the detection mechanism comprising a linear drive assembly (1) for driving a detection shell (2) to move in a vertical direction, and the detection shell (2); characterized in that a laser range finder (21), a pressing cylinder (22), a pressure plate (23), a pressure sensor (24) and a lifting unit (25) are arranged on the detection shell (2); the laser range finder (21) is vertically arranged at an upper portion of the detection shell (2) and has a ranging end vertically downward, the ranging end forms a detection path when detecting the lifting distance of the key (3); the pressing cylinder (22) is movably arranged below the laser range finder (21) in a vertical direction, the pressing cylinder (22) presses the key (3) when descending, and the detection path passes through the center of the pressing cylinder (22); the pressure plate (23) is arranged above the pressing cylinder (22) and has a ring structure, a ring groove is formed in the periphery of the pressure plate (23), the upper portion of the pressing cylinder (22) is sleeved in the ring groove, and a gap is formed between the upper portion of the pressing cylinder (22) and the upper portion of the ring groove, and the pressure sensor (24) is arranged in the gap; the lifting unit (25) is arranged at the upper portion of the pressure plate (23) and is used for driving the pressure plate (23) to lift.

2. The spring elasticity detection mechanism according to claim 1, wherein The lifting unit (25) comprises a rotating ring (251), a pressing block (252), a weight (253) and a traction assembly (254); the rotating ring (251) is rotatably arranged above the pressure plate (23) along the axis of the pressure plate (23); the pressing block (252) is fixedly arranged at the lower portion of the rotating ring (251), the two sides of the pressing block (252) are respectively a slope structure and a vertical structure, and the lower end of the pressing block (252) and the lower end of the rotating ring (251) jointly form a guide end surface for guiding the lifting of the pressure plate (23); the weight (253) is vertically arranged on one side of the pressure plate (23); the two ends of the traction assembly (254) are respectively connected with the weight (253) and the pressure plate (23).

3. A spring elasticity detection mechanism according to claim 2, wherein The traction assembly (254) comprises a rotating wheel (2541) and a traction rope (2542); the rotating wheel (2541) is arranged above the pressure plate (23); the two ends of the traction rope (2542) are fixedly connected with the pressure plate (23) and the weight (253), and the traction rope (2542) is wound on the upper portion of the rotating wheel (2541).

4. The spring elasticity detection mechanism of claim 2, wherein A roller (231) that rolls with the guide end surface is rotatably arranged at the upper portion of the pressure plate (23).

5. The spring elasticity detection mechanism of claim 2, wherein A stop line (255) is arranged on the slope structure of the pressing block (252), the vertical distance between the stop line (255) and the lower end surface of the pressing block (252) is referred to as a first pressing distance, the maximum pressing distance of the key (3) is referred to as a second pressing distance, and the first pressing distance is equal to the second pressing distance.

6. The spring elasticity detection mechanism of claim 2, wherein A guide rod (2531) is vertically arranged through the weight (253), and the guide rod (2531) and the weight (253) slide with each other.

7. The spring elasticity detection mechanism of claim 1, wherein The pressing cylinder (22) is made of a lightweight high-strength material.

8. The spring elasticity detection mechanism of claim 1, wherein A light shielding cylinder (221) is vertically and slidably arranged at the lower portion of the pressing cylinder (22).

9. The spring elasticity detection mechanism of claim 1, wherein The lower part of the pressing cylinder (22) is provided with a pressing head (222), and the lower part of the pressing head (222) is provided with a chamfer. 10.A spring detection device for a smart watch, characterized by The spring elasticity detection mechanism, the feeding mechanism and the discharging mechanism comprise the spring elasticity detection mechanism according to any one of claims 1-9.

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