A system and method for testing earmuff clamping force

Abstract

This invention relates to the field of clamping force testing technology and discloses an earmuff clamping force testing system and method, comprising: a fixed bracket, a signal transmission module, a control and reading system, a support mechanism, and a shock absorption component; the fixed bracket includes a base plate, a first slider, a second slider, a first upright plate, a second upright plate, a housing, a first side plate, and a second side plate. The base plate has a groove inside, and the first and second sliders are slidably installed inside the groove. The first upright plate is fixed to the top of the first slider, the first side plate is installed on the outside of the first upright plate, the second upright plate is fixed to the top of the second slider, and the housing is installed on the top of the second upright plate. This invention, through an adjustable bracket, a matching adapter, and an automatic acquisition system, solves the problems of narrow fitting, poor simulation, and large errors in traditional methods, improving the accuracy and efficiency of earmuff clamping force testing.

Description

Technical Field

[0001] This invention relates to the field of clamping force testing technology, specifically to an earmuff clamping force testing system and method. Background Technology

[0002] Earmuff clamping force testing is an important part of the physical performance testing of acoustic protective products and head-mounted acoustic devices. It is widely used in fields such as occupational safety and consumer electronics. The test results are directly related to the sealing and comfort of the earmuffs when worn, and are one of the key indicators for evaluating whether the quality of earmuff products meets the standards.

[0003] Existing earmuff clamping force testing devices have significant shortcomings: In terms of adaptability, the common practice to cope with different sizes of earmuffs is to replace the corresponding fixing bracket. However, frequent replacement is not only cumbersome to operate, but also increases the testing cost and is difficult to meet the testing needs of earmuffs with different cup shapes. In terms of data processing, existing tests mostly rely on manual reading of force values ​​and manual recording and calculation. Although basic tests can be completed, manual operation is prone to reading errors, and the data processing process is cumbersome, which seriously affects the testing efficiency and the accuracy of the results. Therefore, an earmuff clamping force testing system and method are proposed. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the present invention provides an earmuff clamping force testing system and method to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an earmuff clamping force testing system, comprising:

[0006] Fixed bracket, signal transmission module, control and reading system, support mechanism, and shock absorption components;

[0007] The fixed bracket includes a base plate, a first slider, a second slider, a first upright plate, a second upright plate, a housing, a first side plate, and a second side plate. The base plate has a groove inside, and the first slider and the second slider are slidably installed inside the groove. The first upright plate is fixed to the top of the first slider, the first side plate is installed on the outside of the first upright plate, the second upright plate is fixed to the top of the second slider, and the housing is installed on the top of the second upright plate. Inside the housing, a force sensor and a connecting column are installed sequentially from the inside to the outside, and the second side plate is installed on the outside of the connecting column.

[0008] The slide groove is equipped with a double-ended screw, which is rotatably connected to the base plate. The first slider and the second slider are connected to the double-ended screw through a threaded connection, which can flexibly adjust the spacing to fit different sizes of earmuffs and improve the versatility of the test.

[0009] Non-planar cup pad adapters are installed on the outside of both the first and second side plates, which can simulate the non-planar contact state during actual wear and improve the accuracy of the test;

[0010] The support mechanism includes a base shell, a column, and a support shell. The support shell is fixed to the top of the column, and the column is slidably installed inside the base shell. It can stably support the earmuff suspension part, avoid earmuff displacement or component interference, and ensure the stability of the testing process.

[0011] The signal transmission module is electrically connected to the force sensor and is used to transmit the force signal detected by the force sensor, so as to realize the accurate transmission of the force signal and provide a reliable foundation for subsequent data acquisition.

[0012] The control and reading system is communicatively connected to the signal transmission module. The control and reading system includes a data acquisition unit, a storage unit, and a display unit, which are used to acquire, store, and display force data. It can automatically complete the acquisition, storage, and display of force values, reduce human error, and improve testing efficiency and data reliability.

[0013] Rotating the double-headed screw drives the slider to adjust the side plate spacing, the column slides along the bottom shell, and the test height is fixed by the limit groove and the elastic limit strip; the force value signal detected by the force sensor is transmitted to the control and reading system through the transmission module, and the shock absorption component buffers the vibration;

[0014] It integrates the functions of multiple components, enabling flexible adjustment of test width and height, accurate force value acquisition, reduced vibration interference, and ensuring test stability and versatility.

[0015] Preferably, a turntable is installed at one end of the double-ended screw on the outside of the base plate, and the turntable is fixedly connected to the double-ended screw;

[0016] The turntable surface is textured with anti-slip patterns. Manually rotating the turntable will drive the double-headed screw to rotate, and through the threaded transmission, the two sliders will move synchronously in opposite directions to quickly adjust the spacing between the side plates.

[0017] It is simple and intuitive to operate, requires no additional tools, and can quickly adapt to different sizes of earmuffs, greatly improving the efficiency of spacing adjustment.

[0018] Preferably, the outer sides of the column are provided with equidistant limiting grooves along the length of the column, and the limiting grooves are integrally formed with the column.

[0019] The limiting grooves are evenly distributed along the length of the column, providing multiple engagement points for the elastic limiting strip. Different limiting grooves can be adapted to different test heights, ensuring precise and controllable height adjustment.

[0020] Clearly define the height adjustment positioning point to ensure a fixed and reliable test height, prevent column displacement during testing, and improve test accuracy.

[0021] Preferably, the top of the bottom shell is provided with elastic limiting strips on both sides outside the column, and the elastic limiting strips are fixedly connected to the bottom shell, and the elastic limiting strips are adapted to the limiting grooves;

[0022] The elastic limit strip is made of elastic plastic material with an arc-shaped end. It can be inserted into the limit groove to position the column. The column can be raised and lowered to easily adjust the column height.

[0023] With its simple structure and robust positioning, efficient adjustment process ensures high stability of the support mechanism and further enhances test reliability.

[0024] Preferably, the inner wall of the non-planar cup pad adapter is provided with an annular groove, and the annular groove is integrally formed with the non-planar cup pad adapter. The outer sides of the first side plate and the second side plate are provided with spring pins evenly distributed along the annular ring, and the spring pins are adapted to the annular groove.

[0025] During installation, press the spring pin to embed it into the ring groove to quickly fix the adapter; during disassembly, pull the flat cover cup pad adapter to remove it, and you can replace the appropriate adapter according to the curvature of the ear cup pad.

[0026] It is easy and efficient to assemble and disassemble, and can be flexibly adapted to cup pads with different curvatures, expanding the testing range of equipment and improving versatility.

[0027] Preferably, dampers are installed at all four corners of the bottom of the base plate, and the dampers are fixedly connected to the base plate. A return spring is installed at the bottom of the base plate outside the dampers.

[0028] The damper and the return spring are coaxially arranged, with the return spring sleeved outside the damper, to jointly buffer the vibration of the equipment during the test and reduce the vibration transmitted to the sensor.

[0029] The dual shock absorption design effectively absorbs external vibrations, preventing vibrations from affecting the sensor's detection accuracy and ensuring accurate test data.

[0030] Preferably, the return spring is fixedly connected to the base plate, and the bottom of the return spring and the damper is provided with an anti-slip pad, which is fixedly connected to the return spring and the damper.

[0031] The anti-slip mat is made of high-friction rubber material, which fits the placement surface to increase the friction between the equipment and the contact surface and prevent the equipment from sliding during testing;

[0032] Enhance equipment placement stability, prevent equipment displacement during testing, ensure a stable testing environment, and further improve data reliability.

[0033] Preferably, the control and reading system further includes a data processing unit, which is used to filter the collected force data, and the display unit adopts a touch screen, which displays the force change curve and statistical data in real time.

[0034] The data processing unit removes noise interference from the force signal through a filtering algorithm, and the touch screen displays the real-time force value, change curve and statistical results, supporting data query.

[0035] Optimize data quality, present test results intuitively, facilitate operators to quickly obtain effective information, and improve the efficiency of test data interpretation.

[0036] The earmuff clamping force testing system described above includes the following steps:

[0037] Step 1, Test Preparation: Start the control and reading system, and calibrate the force sensor through the data acquisition unit to ensure detection accuracy;

[0038] Clean the contact layer and the surfaces of the first and second side plates of the non-flat cup pad adapter to remove impurities;

[0039] Step 2, bracket adjustment: According to the size of the earcups to be tested, adjust the distance between the first and second sliders, and adjust the test height by pulling the upright column upward in conjunction with the elastic limiting strip.

[0040] Step 3, Adapter Installation: Based on the curvature of the ear cup pads, select the appropriate non-planar ear cup pad adapter and install the non-planar ear cup pad adapter on the outer surface of the first and second side panels;

[0041] Step 4, Earcup Installation: Place the earcups on the non-flat cup pad adapter and use the headphone holder to lift the headphone suspension part so that the cup pad fits snugly against the non-flat cup pad adapter. If the earcup clamping force is adjustable, adjust it to the minimum clamping force. Adjust the earcup or support arm to ensure that the earcup components do not interfere with the fixed bracket.

[0042] Step 5, Force Value Acquisition: After the earcups are installed and adjusted, wait for the set time, and the force value signal detected by the force sensor is acquired by the acquisition unit of the control and reading system, and the data is recorded by the storage unit;

[0043] Step 6: Repeat the test: Replace with other earmuff samples of the same model, or adjust the width and height to fit other sizes of earmuffs, and repeat steps 2 to 5 to complete multiple sets of tests;

[0044] Step 7: Data Output: The data processing unit statistically analyzes multiple sets of test data, calculates the average clamping force, displays the test results and force value change curve on the display unit, and exports the data through the storage unit.

[0045] Adjust the bracket parameters precisely according to the ear cup size, fix the ear cup after installing the adapter, collect the force value after the equipment is stable, repeat the test on multiple sets of samples, and output the average clamping force and related curves after data processing.

[0046] The testing process is standardized and orderly, covering multiple models and samples to ensure that the test results are comprehensive and objective, meeting the requirements of standardized testing.

[0047] Preferably, between steps three and four, there is also an adapter fit inspection step: observe the tightness of the connection between the non-flat cup pad adapter and the first and second side plates, press the edge of the adapter lightly with your hand, and after confirming that there is no looseness, proceed with the subsequent ear cup installation steps.

[0048] Gently press down on each part of the adapter's edge to check for any looseness or displacement. Once you confirm that the spring pin and the ring groove are fully engaged without any gaps, proceed with the ear cup installation.

[0049] Pre-emptive checks for potential installation problems can prevent testing errors caused by loose adapters, ensuring smooth testing and accurate data.

[0050] Compared with the prior art, the present invention provides an earmuff clamping force testing system and method, which has the following beneficial effects:

[0051] This invention achieves precise fitting and stable installation of earmuffs of different sizes and cup shapes through a fixed bracket with adjustable spacing and height, a non-planar cup pad adapter adapted to different curvatures, and a support mechanism. It has the advantages of strong versatility and testing conditions that closely match actual wearing scenarios, solving the problems of narrow fitting range and difficulty in simulating real wearing contact conditions in traditional testing devices. Through the collaboration of the signal transmission module and the control and reading system, it realizes automatic acquisition, storage, and analysis of force values, which has the advantages of accurate data recording and convenient operation, solving the problems of large errors in manual reading and cumbersome data processing, and improving the accuracy and efficiency of earmuff clamping force testing as a whole. Attached Figure Description

[0052] Figure 1 This is a perspective view of the overall structure of the present invention;

[0053] Figure 2 For the present invention Figure 1 Enlarged view of a portion of region A in the middle;

[0054] Figure 3 This is a cross-sectional view of the non-planar cup pad adapter structure of the present invention;

[0055] Figure 4 This is a schematic diagram of the earmuff clamping force testing system of the present invention;

[0056] Figure 5 This is a step diagram of the earmuff clamping force testing method of the present invention.

[0057] In the diagram: 1. Base plate; 2. Slide groove; 3. Double-ended screw; 4. Turntable; 5. First slider; 6. Second slider; 7. First upright plate; 8. First side plate; 9. Second upright plate; 10. Housing; 11. Force sensor; 12. Connecting column; 13. Second side plate; 14. Non-planar cover cup pad adapter; 15. Spring pin; 16. Ring groove; 17. Elastic limit strip; 18. Bottom shell; 19. Column; 20. Limiting groove; 21. Support shell; 22. Return spring; 23. Damper; 24. Anti-slip pad. Detailed Implementation

[0058] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0059] This invention provides a technical solution: an earmuff clamping force testing system. Please refer to [link / reference]. Figures 1-5 ,include:

[0060] Fixed bracket, signal transmission module, control and reading system, support mechanism, and shock absorption components;

[0061] The fixed bracket includes a base plate 1, a first slider 5, a second slider 6, a first upright plate 7, a second upright plate 9, a housing 10, a first side plate 8, and a second side plate 13. The base plate 1 has a groove 2 inside, and the first slider 5 and the second slider 6 are slidably installed inside the groove 2. The first upright plate 7 is fixed to the top of the first slider 5, the first side plate 8 is installed on the outside of the first upright plate 7, the second upright plate 9 is fixed to the top of the second slider 6, the housing 10 is installed on the top of the second upright plate 9, and the force sensor 11 and the connecting column 12 are installed sequentially from the inside to the outside inside the housing 10. The second side plate 13 is installed on the outside of the connecting column 12.

[0062] The slide 2 is equipped with a double-ended screw 3, which is rotatably connected to the base plate 1. The first slider 5 and the second slider 6 are connected to the double-ended screw 3 by threaded engagement.

[0063] Non-planar cup pad adapters 14 are installed on the outside of both the first side plate 8 and the second side plate 13;

[0064] The support mechanism includes a base shell 18, a column 19, and a support shell 21. The support shell 21 is fixed to the top of the column 19, and the column 19 is slidably installed inside the base shell 18.

[0065] The signal transmission module is electrically connected to the force sensor 11 and is used to transmit the force value signal detected by the force sensor 11.

[0066] The control and reading system is communicatively connected to the signal transmission module. The control and reading system includes a data acquisition unit, a storage unit, and a display unit, which are used to acquire, store, and display force value data.

[0067] Rotating the double-headed screw 3 drives the slider to adjust the side plate spacing. The column 19 slides along the bottom shell 18 and fixes the test height through the limiting groove 20 and the elastic limiting strip 17. The force value signal detected by the force sensor 11 is transmitted to the control and reading system through the transmission module, and the shock absorption component buffers the vibration.

[0068] It integrates the functions of multiple components, enabling flexible adjustment of test width and height, accurate force value acquisition, reduced vibration interference, and ensuring test stability and versatility.

[0069] Please see Figure 1 A turntable 4 is installed on one end of the double-ended screw 3 on the outside of the base plate 1, and the turntable 4 is fixedly connected to the double-ended screw 3.

[0070] The surface of turntable 4 is provided with anti-slip texture. Manually rotating turntable 4 will drive the double-headed screw 3 to rotate, and through the thread transmission, the two sliders will move synchronously in opposite directions to quickly adjust the side plate spacing.

[0071] It is simple and intuitive to operate, requires no additional tools, and can quickly adapt to different sizes of earmuffs, greatly improving the efficiency of spacing adjustment.

[0072] Please see Figure 1 and Figure 2 Limiting grooves 20 are provided at equal intervals on both sides of the outer side of the column 19 along the length direction of the column 19, and the limiting grooves 20 are integrally formed with the column 19.

[0073] The limiting grooves 20 are evenly distributed along the length of the column 19, providing multiple engagement points for the elastic limiting strip 17. Different limiting grooves 20 can be adapted to different test heights to ensure precise and controllable height adjustment.

[0074] Clearly define the height adjustment positioning point to ensure a fixed and reliable test height, prevent displacement of column 19 during testing, and improve test accuracy.

[0075] Please see Figure 1 and Figure 2 The top of the bottom shell 18 is provided with elastic limiting strips 17 on both sides outside the column 19, and the elastic limiting strips 17 are fixedly connected to the bottom shell 18. The elastic limiting strips 17 are adapted to the limiting groove 20.

[0076] The elastic limit strip 17 is made of elastic plastic material with an arc-shaped end. It is inserted into the limit groove 20 to position the column 19. The column 19 can be raised and lowered to easily adjust its height.

[0077] With its simple structure and robust positioning, efficient adjustment process ensures high stability of the support mechanism and further enhances test reliability.

[0078] Please see Figure 1 and Figure 3 The inner wall of the non-planar cup pad adapter 14 is provided with an annular groove 16, and the annular groove 16 is integrally formed with the non-planar cup pad adapter 14. The outer sides of the first side plate 8 and the second side plate 13 are provided with spring pins 15 evenly distributed along the annular ring, and the spring pins 15 are adapted to the annular groove 16.

[0079] During installation, press the spring pin 15 to embed it into the ring groove 16 to quickly fix the adapter; during disassembly, pull the non-planar cup pad adapter 14 to remove it, and the appropriate adapter can be replaced according to the curvature of the ear cup pad.

[0080] It is easy and efficient to assemble and disassemble, and can be flexibly adapted to cup pads with different curvatures, expanding the testing range of equipment and improving versatility.

[0081] Please see Figure 1 Dampers 23 are installed at the four corners of the bottom of the base plate 1, and the dampers 23 are fixedly connected to the base plate 1. A return spring 22 is installed at the bottom of the base plate 1 outside the dampers 23.

[0082] The damper 23 and the return spring 22 are coaxially arranged. The return spring 22 is sleeved outside the damper 23. Together they buffer the vibration of the equipment during the test and reduce the vibration transmitted to the sensor.

[0083] The dual shock absorption design effectively absorbs external vibrations, preventing vibrations from affecting the detection accuracy of sensor 11 and ensuring accurate test data.

[0084] Please see Figure 1 The return spring 22 is fixedly connected to the base plate 1. The bottom of the return spring 22 and the damper 23 is provided with an anti-slip pad 24, and the anti-slip pad 24 is fixedly connected to the return spring 22 and the damper 23.

[0085] The anti-slip mat is made of high-friction coefficient rubber material, which fits the placement surface to increase the friction between the equipment and the contact surface and prevent the equipment from sliding during testing.

[0086] Enhance equipment placement stability, prevent equipment displacement during testing, ensure a stable testing environment, and further improve data reliability.

[0087] Please see Figure 4 The control and reading system also includes a data processing unit, which is used to filter the collected force data. The display unit uses a touch screen, which displays the force change curve and statistical data in real time.

[0088] The data processing unit removes noise interference from the force signal through a filtering algorithm, and the touch screen displays the real-time force value, change curve and statistical results, supporting data query.

[0089] Optimize data quality, present test results intuitively, facilitate operators to quickly obtain effective information, and improve the efficiency of test data interpretation.

[0090] Please see Figure 1 and Figure 5 An earmuff clamping force testing method, based on the aforementioned earmuff clamping force testing system, includes the following steps:

[0091] Step 1, Test Preparation: Start the control and reading system, and calibrate the force sensor 11 through the data acquisition unit to ensure detection accuracy;

[0092] Clean the contact layer of the non-flat cup pad adapter 14 and the surfaces of the first side plate 8 and the second side plate 13 to remove impurities;

[0093] Step 2, bracket adjustment: According to the size of the earmuff to be tested, adjust the distance between the first slider 5 and the second slider 6, and adjust the test height by pulling the column 19 upward in conjunction with the limit of the elastic limit strip 17;

[0094] Step 3, Adapter Installation: Select the appropriate non-planar cup pad adapter 14 according to the curvature of the ear cup pad, and install the non-planar cup pad adapter 14 on the outer surface of the first side plate 8 and the second side plate 13.

[0095] Step 4, Earmuff Installation: Place the earmuffs on the non-planar cup pad adapter 14 and use the support shell 21 to lift the headphone suspension part so that the cup pad fits snugly against the non-planar cup pad adapter 14. If the earmuff clamping force is adjustable, adjust it to the minimum clamping force state and adjust the cup or support arm of the earmuff to ensure that the earmuff components do not interfere with the fixed bracket.

[0096] Step 5, Force Value Acquisition: After the earcups are installed and adjusted, wait for the set time, and acquire the force value signal detected by the force sensor 11 through the acquisition unit of the control and reading system. The data is then recorded by the storage unit.

[0097] Step 6: Repeat the test: Replace with other earmuff samples of the same model, or adjust the width and height to fit other sizes of earmuffs, and repeat steps 2 to 5 to complete multiple sets of tests;

[0098] Step 7: Data Output: The data processing unit statistically analyzes multiple sets of test data, calculates the average clamping force, displays the test results and force value change curve on the display unit, and exports the data through the storage unit.

[0099] Adjust the bracket parameters precisely according to the ear cup size, fix the ear cup after installing the adapter, collect the force value after the equipment is stable, repeat the test on multiple sets of samples, and output the average clamping force and related curves after data processing.

[0100] The testing process is standardized and orderly, covering multiple models and samples to ensure that the test results are comprehensive and objective, meeting the requirements of standardized testing.

[0101] Please see Figure 1 , Figure 3 and Figure 5 Between steps three and four, there is also an adapter fit inspection step: observe the tightness of the connection between the non-flat cup pad adapter 14 and the first side plate 8 and the second side plate 13, press the edge of the adapter lightly with your hand, and after confirming that there is no looseness, proceed with the subsequent ear cup installation steps.

[0102] Gently press on each part of the adapter edge to check for any looseness or displacement. After confirming that the spring pin 15 and the ring groove 16 are fully engaged without any gaps, proceed with the ear cup installation.

[0103] Pre-emptive checks for potential installation problems can prevent testing errors caused by loose adapters, ensuring smooth testing and accurate data.

[0104] This solution involves manually rotating a turntable 4 with anti-slip texture to drive a double-headed screw 3, causing the first slider 5 and the second slider 6 to move synchronously in opposite directions along the slide groove 2, adjusting the distance between the first side plate 8 and the second side plate 13. The column 19 slides along the bottom shell 18, and the test height is fixed by engaging with the elastic limit strip 17 through the limiting groove 20. Following the curvature of the earmuff cup pad, the non-planar cup pad adapter 14 is installed via the spring pin 15 and the ring groove 16, and after checking for fit, the headband is supported by the support shell 21. The clamping force signal detected by the force sensor 11 is transmitted to the control and reading system via the signal transmission module. The data processing unit filters the data, the storage unit records the data, and the display unit presents the force value, change curve, and statistical results in real time. The reset spring 22 and damper 23 buffer vibration, and the anti-slip pad 24 increases friction to prevent equipment displacement. After changing samples or adjusting parameters and repeating the test, the average clamping force and related curves of multiple sets of data can be exported, enabling accurate and stable testing of multiple earmuff sizes.

[0105] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0106] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An earmuff clamping force testing system, characterized in that, include: Fixed bracket, signal transmission module, control and reading system, support mechanism, and shock absorption components; The fixed bracket includes a base plate (1), a first slider (5), a second slider (6), a first upright plate (7), a second upright plate (9), a housing (10), a first side plate (8), and a second side plate (13). The base plate (1) has a groove (2) inside. The first slider (5) and the second slider (6) are slidably installed inside the groove (2). The first upright plate (7) is fixed to the top of the first slider (5). The first side plate (8) is installed on the outside of the first upright plate (7). The second upright plate (9) is fixed to the top of the second slider (6). The housing (10) is installed on the top of the second upright plate (9). The inside of the housing (10) is installed with a force sensor (11) and a connecting column (12) from the inside to the outside. The second side plate (13) is installed on the outside of the connecting column (12). The slide groove (2) is provided with a double-ended screw (3), and the double-ended screw (3) is rotatably connected to the base plate (1). The first slider (5) and the second slider (6) are connected to the double-ended screw (3) by threaded engagement. Non-planar cup pad adapters (14) are installed on the outside of both the first side plate (8) and the second side plate (13). The support mechanism includes a bottom shell (18), a column (19) and a support shell (21). The support shell (21) is fixed to the top of the column (19), and the column (19) is slidably installed inside the bottom shell (18). The signal transmission module is electrically connected to the force sensor (11) and is used to transmit the force value signal detected by the force sensor; The control and reading system is communicatively connected to the signal transmission module. The control and reading system includes a data acquisition unit, a storage unit, and a display unit, used to acquire, store, and display force value data. The inner wall of the non-planar cup pad adapter (14) is provided with an annular groove (16), and the annular groove (16) is integrally formed with the non-planar cup pad adapter (14). The outer sides of the first side plate (8) and the second side plate (13) are provided with spring pins (15) evenly distributed along the ring. The spring pins (15) are adapted to the annular groove (16). The adapter is replaced according to the curvature of the ear cup pad. Dampers (23) are installed at the four corners of the bottom of the base plate (1), and the dampers (23) are fixedly connected to the base plate (1). A return spring (22) is installed at the bottom of the base plate (1) outside the dampers (23). The control and reading system also includes a data processing unit, which is used to filter the collected force data. The display unit adopts a touch screen, which displays the force change curve and statistical data in real time.

2. The earmuff clamping force testing system according to claim 1, characterized in that: The double-ended screw (3) is mounted on a turntable (4) at one end of the base plate (1), and the turntable (4) is fixedly connected to the double-ended screw (3).

3. The earmuff clamping force testing system according to claim 1, characterized in that: Limiting grooves (20) are provided at equal intervals on both sides of the outer side of the column (19) along the length direction of the column (19), and the limiting grooves (20) are integrally formed with the column (19).

4. The earmuff clamping force testing system according to claim 3, characterized in that: The top of the bottom shell (18) is provided with elastic limiting strips (17) on both sides outside the column (19), and the elastic limiting strips (17) are fixedly connected to the bottom shell (18). The elastic limiting strips (17) are adapted to the limiting groove (20).

5. The earmuff clamping force testing system according to claim 1, characterized in that: The reset spring (22) is fixedly connected to the base plate (1). The bottom of the reset spring (22) and the damper (23) is provided with an anti-slip pad (24), and the anti-slip pad (24) is fixedly connected to the reset spring (22) and the damper (23).

6. A method for testing earmuff clamping force, based on an earmuff clamping force testing system as described in any one of claims 1-5, characterized in that, Includes the following steps: Step 1, Test Preparation: Start the control and reading system and calibrate the force sensor (11) through the data acquisition unit; Clean the contact layer of the non-flat cup pad adapter (14) and the surfaces of the first side plate (8) and the second side plate (13) to remove impurities; Step 2, bracket adjustment: According to the size of the earmuff to be tested, adjust the distance between the first slider (5) and the second slider (6), and adjust the test height by pulling the column (19) upward in conjunction with the limit of the elastic limit strip (17); Step 3, Adapter Installation: Select the appropriate non-planar cup pad adapter (14) according to the curvature of the ear cup pad, and install the non-planar cup pad adapter (14) on the outer surface of the first side plate (8) and the second side plate (13); Step 4, Ear cup installation: Wear the ear cups on the non-flat cup pad adapter (14), and use the support shell (21) to lift the headphone suspension part so that the cup pad fits against the non-flat cup pad adapter (14); Step 5, Force Value Acquisition: After the earcups are installed and adjusted, wait for the set time, and the force value signal detected by the force sensor is acquired by the acquisition unit of the control and reading system, and the data is recorded by the storage unit; Step 6: Repeat the test: Replace with other earmuff samples of the same model, or adjust the width and height to fit other sizes of earmuffs, and repeat steps 2 to 5 to complete multiple sets of tests; Step 7: Data Output: The data processing unit statistically analyzes multiple sets of test data, calculates the average clamping force, displays the test results and force value change curve on the display unit, and exports the data through the storage unit. Between steps three and four, there is also an adapter fit inspection step: observe the tightness of the connection between the non-flat cup pad adapter (14) and the first side plate (8) and the second side plate (13), and then proceed with the subsequent earmuff installation steps.

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