Automobile seat slide rail friction force detection device

Abstract

The invention relates to the technical field of friction force detection, in particular to an automobile seat slide rail friction force detection device which comprises an electric guide rail, a mounting frame is arranged on the electric guide rail, a pressing handle is rotatably mounted on the mounting frame, a limiting block is fixedly mounted on the mounting frame, and a limiting hole is formed in the limiting block. A movable rod is movably arranged in the limiting hole, a sleeve is rotationally installed at the top end of the movable rod, and the sleeve is arranged on the pressing handle in a sleeving mode; an elastic piece is arranged at the bottom end of the movable rod, a strain gauge is fixedly installed on the side face of the elastic piece, and a magnet used for attracting a groove in the sliding rail is arranged at the bottom end of the elastic piece; the sliding rail fixing device further comprises a fixing base which is used for limiting the sliding rail lower groove. The sliding rail fixing speed of the detection equipment is increased, so that the detection efficiency is improved, and the detection efficiency requirement of a production line is met.

Description

Technical Field

[0001] This invention relates to the field of friction detection technology, specifically to a friction detection device for automotive seat slide rails. Background Technology

[0002] With market development and demand, existing car seats generally have adjustment functions. Therefore, there is a large demand for seat rails in the automotive manufacturing industry. Whether the friction between the seat rails is up to standard will significantly affect the user experience when adjusting the car seat.

[0003] Currently, most manufacturers of seat slide rails rely on manual testing to inspect the quality of products produced on their production lines. The process involves fixing the lower groove with pins and manually pushing the upper groove back and forth within it. The worker judges the friction between the slide rails by feel, determining the degree of looseness and whether the friction is within acceptable limits. However, this manual inspection method relies solely on worker feel, introducing significant uncertainty and making it difficult to guarantee consistent product quality.

[0004] While existing technologies include testing devices such as the one published in CN210346959U, entitled "Slide Rail Pair Friction Testing Platform," these devices require tightening multiple bolts to secure the upper and lower grooves of the slide rail during testing to ensure its tightness and prevent errors in the test results. This results in a significant time commitment to securing the slide rail, severely limiting testing efficiency and making it difficult to meet the testing efficiency requirements of production lines.

[0005] To address this, a device for detecting the friction of automotive seat slide rails is proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a friction detection device for automotive seat slide rails, which improves the fixing speed of the detection equipment on the slide rail, thereby increasing detection efficiency and meeting the detection efficiency requirements of the production line.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A friction detection device for automotive seat slide rails includes an electric guide rail, a mounting bracket on the electric guide rail, a pressure handle rotatably mounted on the mounting bracket, a limit block fixedly mounted on the mounting bracket, a limit hole formed on the limit block, a movable rod movably disposed within the limit hole, a sleeve rotatably mounted on the top end of the movable rod, the sleeve being fitted onto the pressure handle; a spring plate is disposed at the bottom end of the movable rod, a strain gauge is fixedly mounted on the side of the spring plate, and a magnet for attracting the upper groove of the slide rail is disposed at the bottom end of the spring plate; it also includes a fixed base for providing a limit for the lower groove of the slide rail.

[0008] Based on this design, during operation, the tester first places the slide rail to be tested onto the fixed base. The lower groove of the slide rail is secured by a pre-set groove on the fixed base, preventing it from moving horizontally or downwards vertically. Then, the tester presses down on the handle, causing the magnet to move downwards towards the upper groove of the slide rail, eventually abutting and adhering to the top of the upper groove. At this point, the lower groove experiences a downward force through the upper groove, completely restricting its movement, while the upper groove can move along the lower groove. Testing can then proceed. Thus, the tester only needs to place the slide rail to be tested onto the fixed base and press down the handle to complete the installation, enabling rapid commencement of the testing process. This increases the speed at which the testing equipment can secure the slide rail, thereby improving testing efficiency and better meeting the efficiency requirements of the production line.

[0009] At the start of the test, the operator activates the electric guide rail, which begins to move its slider at a constant speed. The mounting bracket fixed to the slider also moves at a constant speed. Correspondingly, the spring also moves. During this process, when the force transmitted to the upper groove cannot overcome the friction between the upper and lower grooves, the upper groove does not move, but the spring and its strain gauge undergo elastic bending deformation. Based on the degree of deformation, the strain gauge sends an electrical signal to the outside. This signal is recognized, processed, and converted into a readable friction force value by the external control system. During this stage, because the force on the upper groove cannot overcome the friction between the upper and lower grooves, the deformation of the spring and strain gauge continuously increases with the movement of the mounting bracket, thus continuously increasing the measured friction force value.

[0010] When the force on the upper groove is sufficient to overcome the friction between the upper and lower grooves, the upper groove will move at a constant speed on the lower groove. At this point, the friction force value read from the external control system will stabilize and no longer increase. This allows the measurement of the sliding friction force between the upper and lower grooves. Furthermore, since the testing process is continuous, data such as the maximum static friction force can also be obtained from the collected data.

[0011] Preferably, a first locking tooth is fixedly installed on the pressure handle, a mounting slot is provided on the mounting bracket, a return spring is fixedly installed in the mounting slot, a second locking tooth is fixedly installed on the other end of the return spring, and the second locking tooth is used to abut against the first locking tooth; a connecting hole is provided on the mounting bracket, the connecting hole is connected to the mounting slot, and a paddle is rotatably installed in the connecting hole; a locking groove is provided on the second locking tooth, and the paddle abuts against the locking groove.

[0012] With this setup, when the tester presses down the handle, the bottom surface of clamp tooth one will abut against the top surface of clamp tooth two. The compression of the two inclined surfaces compresses the return spring, causing clamp tooth two to retract into the mounting groove, allowing clamp tooth one to press down smoothly. Once clamp tooth one has passed the position of clamp tooth two, clamp tooth two will pop out of the mounting groove again under the action of the return spring. At this point, when the handle attempts to move upward, the top surface of clamp tooth one will engage with the bottom surface of clamp tooth two, locking them together and preventing the handle from jumping upward. Thus, the clamping force provided by the handle to the lower groove of the slide rail is maintained, ensuring the lower groove is stably fixed and avoiding data distortion caused by lower groove displacement, thereby ensuring the reliability of the measurement data.

[0013] When the test is completed and the pressure handle needs to be lifted again to separate the magnet from the upper slot, the tester can move the lever to manually move the second locking tooth into the mounting slot. This temporarily removes the obstruction of the second locking tooth from the movement path of the first locking tooth, allowing the pressure handle to return to its original position, the magnet to separate from the upper slot, and the slide rail to be removed from the mounting base. This prepares the device for the next test.

[0014] Preferably, a limiting tooth is fixedly installed on the first locking tooth, and a limiting groove is formed on the second locking tooth. The limiting groove is used to accommodate the limiting tooth, and the limiting tooth and the limiting groove cooperate in an abutting manner.

[0015] To ensure smooth movement of the second locking tooth within the mounting groove, a certain clearance must exist between the second locking tooth and the mounting groove. However, this will cause the second locking tooth to tilt slightly after it comes into contact with the first locking tooth, resulting in the bottom surface of the second locking tooth changing from a flat surface to an inclined surface. In this case, when the second locking tooth is subjected to a force from the first locking tooth, this force will still have a component along the axis of the mounting groove. This could cause the second locking tooth to still retract into the mounting groove, thus weakening or even eliminating its limiting effect on the first locking tooth. This problem is more likely to occur when the dimensions of the second and first locking teeth are small, as the contact area between the bottom surface of the second locking tooth and the top surface of the first locking tooth is also small.

[0016] With this configuration, when the second locking tooth abuts against the first locking tooth to prevent the pressure handle from jumping upwards, the limiting tooth will engage in the limiting groove, thereby restricting the movement of the second locking tooth along the axis of the mounting groove. This ensures the limiting effect of the second locking tooth on the first locking tooth, thus guaranteeing the reliability of the measurement data and helping to improve the consistency of product quality. Furthermore, this design allows for smaller dimensions of the first and second locking teeth, facilitating miniaturization. Therefore, the dimension of this invention in the normal direction of the sliding plane of the electric guide rail can be reduced, allowing the pressure handle to be closer to the electric guide rail. This helps reduce the torque generated by the pressure on the pressure handle on the electric guide rail, increasing the service life of the electric guide rail and indirectly ensuring the accuracy of the measurement results.

[0017] Preferably, the bottom end of the movable rod is provided with a protective shell one, the top end of the spring piece is fixedly connected to the inside of the protective shell one, the bottom end of the spring piece is provided with a protective shell two, the protective shell two is used to abut against the protective shell one, and the magnet is fixedly installed on the bottom outer side of the protective shell two.

[0018] During the downward pressing of the handle, due to human error, even after the magnet has abutted and attracted to the upper groove of the slide rail, the tester may continue to apply downward pressure, potentially causing the spring to be subjected to excessive pressure and damaged. This design ensures that when excessive pressure is applied downwards by the handle, the elastic deformation of the spring will cause protective shell one and protective shell two to approach and abut against each other.

[0019] At this point, the additional downward pressure will be borne by the structural rigidity of the first and second protective shells, thus preventing the spring from being subjected to this additional pressure load. This helps to avoid damage to the spring due to excessive pressure and improves the reliability of the invention.

[0020] It is worth noting that a clearance is reserved between protective shell two and protective shell one during installation. Excessive force applied to the pressure handle will cause protective shell one and protective shell two to come into contact. When the tester removes the force applied to the pressure handle, the elastic deformation of the spring returns to normal, thus restoring the clearance between protective shell two and protective shell one. Therefore, during the testing of slide rail friction, when the spring deforms, protective shell two can be misaligned with protective shell one, thus not affecting the deformation of the spring. Furthermore, protective shell two and protective shell one will not rub against each other during the measurement process, therefore not introducing any additional errors into the test results.

[0021] Preferably, the spring sheet includes a bending portion and a testing portion, the bending portion is connected to the second protective shell, and the strain gauge is fixedly mounted on the testing portion.

[0022] With this design, when excessive pressure is applied downwards by the pressure handle, the elastic deformation of the spring will not be a compressive deformation along its length, but rather a bending deformation occurring at the bend. For a sheet-like spring, the bending deformation at the bend has two advantages over the compressive deformation along its length: First, the force threshold required for deformation is lower, allowing the first and second protective shells to come into contact earlier and provide protection; second, the form, direction, and degree of the bending deformation are more controllable, thus making it less likely for the spring to be damaged under excessive pressure.

[0023] Therefore, the reliability of the present invention can be further guaranteed.

[0024] Preferably, the bent portion is fixedly installed on the side of the test portion, a groove plate is fixedly installed inside the second protective shell, a sliding groove is formed on the groove plate, a sliding rod is fixedly installed on the bent portion, and the sliding rod is set in the sliding groove; a floating groove is formed inside the second protective shell, and the lower end of the test portion is inserted into the floating groove.

[0025] With this configuration, the second protective shell is hung on the sliding rod via the sliding groove, thus connecting the second protective shell to the structure of the present invention. Furthermore, placing the test section within the floating groove prevents the test section from being squeezed against the second protective shell during the pressing of the pressure handle, even if the pressure on the handle is excessive. This helps avoid damage to the test section and strain gauge caused by excessive pressure on the pressure handle. During testing, as the electric guide rail moves, the side of the test section abuts and presses against the side wall of the floating groove, causing the test section to bend, thereby measuring the friction force data.

[0026] Preferably, a first mounting cover is fixedly installed at the bottom end of the movable rod, a protective spring is fixedly installed inside the first mounting cover, and a second mounting cover is fixedly installed on the other end of the protective spring; the first protective shell is fixedly installed at the bottom end of the second mounting cover.

[0027] By configuring mounting covers one and two, and a protective spring, when the pressure handle is applied downwards, causing the magnet to attract to the upper groove of the slide rail, the pressure handle needs to be pressed down a certain distance further so that the first locking tooth passes the position of the second locking tooth. At this time, the protective spring is compressed and stores energy. When the tester releases the pressure handle, the protective spring pushes the pressure handle upwards, ensuring that the top surface of the first locking tooth is in contact with the bottom surface of the second locking tooth, thus effectively limiting the position of the pressure handle. Therefore, during the movement of the mounting bracket and its components on the electric guide rail, the mechanical vibration generated will not cause the pressure handle to vibrate significantly, thereby helping to prevent the first locking tooth from colliding with the second locking tooth and extending the service life of the first and second locking teeth.

[0028] In addition, another technical solution exists to prevent the pressure handle from vibrating excessively as it moves along the electric guide rail. In this case, a push spring can be fixedly installed on the limit block, and the other end of the push spring can be fixedly connected to the pressure handle.

[0029] With this setup, when the pressure handle is pressed down and the first locking tooth passes the second locking tooth, the push spring will be compressed, and correspondingly, the push spring will also press the first locking tooth against the second locking tooth. This solution has its advantages and disadvantages compared to the previous solution, as detailed below: On the one hand, when using a push spring, the spring pushes the pressure handle upwards, and also pushes the various components connected to the pressure handle upwards. Therefore, the push spring needs to have a large elastic coefficient, which results in a large force required to compress the push spring, thus increasing the labor intensity of the workers. However, this also allows the spring to be raised to a certain height, so that the bent part does not abut against the second protective shell after being raised. This prevents the bent part from rubbing against the second protective shell during the test, thereby eliminating the interference of the friction between the bent part and the second protective shell on the test results and helping to improve the accuracy of the test results.

[0030] On the other hand, when using a protective spring, the spring force only needs to push up the moving rod, sleeve, and pressure handle, allowing for a smaller spring constant and reducing the workload of workers. However, because the spring force pushes the bent part downwards, friction occurs between the bent part and the second protective shell during testing. This frictional force between the bent part and the second protective shell introduces interference into the test data, hindering the accuracy of the test results.

[0031] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In operation, the present invention allows the tester to place the slide rail to be tested onto the fixed base, then press down the handle to cause the magnet to abut and adhere to the top of the upper groove, thus completely restricting the movement of the lower groove. Simultaneously, the upper groove can move along the lower groove. Testing can then proceed. Therefore, the tester only needs to place the slide rail to be tested onto the fixed base and press down the handle to complete the fixed installation of the slide rail, enabling rapid commencement of the testing process. This increases the speed at which the testing equipment can fix the slide rail, thereby improving testing efficiency and better meeting the production line's requirements for testing efficiency.

[0032] 2. By providing protective shell one and protective shell two, when the downward pressure applied by the pressure handle is too great, the elastic deformation of the spring will cause protective shell one and protective shell two to approach and abut against each other. At this time, the additional downward pressure will be borne by the structural rigidity of protective shell one and protective shell two, thereby preventing the spring from being subjected to this additional pressure load. This helps to avoid the spring from being damaged due to excessive pressure, thus improving the reliability of the invention.

[0033] 3. By incorporating a curved section, when excessive pressure is applied downwards by the pressure handle, the elastic deformation of the spring will not be a compressive deformation along its length, but rather a bending deformation occurring at the curved section. For a sheet-like spring, the bending deformation at the curved section has two advantages over compressive deformation along its length: First, the force threshold required for deformation is lower, allowing the first and second protective shells to come into contact earlier and provide protection; second, the form, direction, and degree of bending deformation are more controllable, thus making it less likely for the spring to be damaged under excessive pressure. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the present invention; Figure 2 This is a front view schematic diagram of the overall structure of the present invention; Figure 3 for Figure 2 A magnified view of part A in the middle; Figure 4 for Figure 2 A partial cross-sectional view of section BB in the middle section; Figure 5 for Figure 4 A magnified view of part C in the middle; Figure 6 This is a schematic diagram of the overall structure of the shrapnel; Figure 7 This is a schematic diagram of the structure of the second embodiment of the present invention; Figure 8 for Figure 7 A magnified view of part D in the middle.

[0035] In the diagram: 1. Electric guide rail; 2. Mounting bracket; 3. Pressure handle; 4. Limiting block; 5. Push spring; 6. Movable rod; 7. Protective shell one; 11. Fixed base; 21. Connecting hole; 22. Paddle; 23. Return spring; 24. Locking tooth two; 25. Mounting groove; 26. Locking groove; 27. Locking tooth one; 28. Limiting tooth; 29. ​​Limiting groove; 31. Sleeve; 61. Limiting hole; 62. Mounting cover one; 63. Mounting cover two; 64. Protective spring; 71. Protective shell two; 72. Magnet; 73. Spring; 74. Strain gauge; 75. Testing section; 76. Bending section; 77. Groove plate; 751. Floating groove; 771. Sliding groove; 772. Sliding rod. Detailed Implementation

[0036] The following description, with the aid of the accompanying drawings listed in the foregoing "Description of Drawings", will clearly illustrate the specific embodiments of the present invention, in order to enable readers to have a more complete and objective understanding of the working principle and corresponding technical effects of the present invention.

[0037] like Figures 1 to 6 The image shows a first specific embodiment of the present invention.

[0038] When installing this invention, first take out the electric guide rail 1. The electric guide rail 1 is provided with a mounting bracket 2. A pressure handle 3 is rotatably mounted on the mounting bracket 2. A limit block 4 is fixedly mounted on the mounting bracket 2. A limit hole 61 is opened on the limit block 4. A movable rod 6 is movably arranged in the limit hole 61. A sleeve 31 is rotatably mounted on the top end of the movable rod 6. The sleeve 31 is sleeved on the pressure handle 3. A spring piece 73 is provided at the bottom end of the movable rod 6. A strain gauge 74 is fixedly mounted on the side of the spring piece 73. A magnet 72 for adsorbing the upper groove of the slide rail is provided at the bottom end of the spring piece 73. It also includes a fixing seat 11, which is used to provide a limit for the lower groove of the slide rail.

[0039] The clamping handle 3 is fixedly equipped with a first locking tooth 27. The mounting bracket 2 has a mounting groove 25, in which a return spring 23 is fixedly installed. The other end of the return spring 23 is fixedly equipped with a second locking tooth 24, which abuts against the first locking tooth 27. The mounting bracket 2 has a connecting hole 21, which communicates with the mounting groove 25. A lever 22 is rotatably installed in the connecting hole 21. The second locking tooth 24 has a locking groove 26, in which the lever 22 abuts against the locking groove 26. A limiting tooth 28 is fixedly installed on the first locking tooth 27. A limiting groove 29 is formed on the second locking tooth 24, which accommodates the limiting tooth 28. The limiting tooth 28 and the limiting groove 29 abut against each other.

[0040] In addition, a protective shell 7 is provided at the bottom of the movable rod 6. The top of the spring piece 73 is fixedly connected to the inside of the protective shell 7. A second protective shell 71 is provided at the bottom of the spring piece 73. The second protective shell 71 is used to abut against the protective shell 7. The magnet 72 is fixedly installed on the bottom outer side of the second protective shell 71. The spring piece 73 includes a bending part 76 and a testing part 75. The bending part 76 is connected to the second protective shell 71. The strain gauge 74 is fixedly installed on the testing part 75. The bending part 76 is fixedly installed on the side of the testing part 75. A groove plate 77 is fixedly installed inside the second protective shell 71. A sliding groove 771 is opened on the groove plate 77. A sliding rod 772 is fixedly installed on the bending part 76. The sliding rod 772 is set in the sliding groove 771. A floating groove 751 is opened inside the second protective shell 71. The lower end of the testing part 75 is inserted into the floating groove 751. A push spring 5 is fixedly installed on the limiting block 4. The other end of the push spring 5 is fixedly connected to the pressure handle 3.

[0041] In operation, the tester first places the slide rail to be tested onto the fixed base 11. The lower groove of the slide rail is secured by a pre-set groove on the fixed base 11, preventing it from moving horizontally or downwards vertically. Then, the tester presses down on the handle 3, causing the magnet 72 to move downwards towards the upper groove of the slide rail, ultimately abutting and adsorbing onto the top of the upper groove. At this point, the lower groove experiences a downward force through the upper groove, completely restricting its movement, while the upper groove can move along the lower groove. Testing can then proceed. Thus, the tester only needs to place the slide rail to be tested onto the fixed base 11 and press down on the handle 3 to complete the fixed installation, enabling rapid commencement of the testing process. This improves the speed of slide rail fixation by the testing equipment, thereby increasing testing efficiency and better meeting the efficiency requirements of the production line.

[0042] At the start of the test, the tester activates the electric guide rail 1, which begins to move the slider on it at a constant speed. The mounting bracket 2, fixed to the slider on the electric guide rail 1, also moves at a constant speed. Correspondingly, the spring 73 also moves. During this process, when the force transmitted to the upper groove cannot overcome the friction between the upper and lower grooves, the upper groove does not move, but the spring 73 and its strain gauge 74 undergo elastic bending deformation. Based on the degree of deformation, the strain gauge 74 sends an electrical signal to the outside. This electrical signal is recognized, processed, and converted into a readable friction force value by the external control system. During this stage, because the force on the upper groove cannot overcome the friction between the upper and lower grooves, the deformation of the spring 73 and strain gauge 74 continuously increases as the mounting bracket 2 moves, thus continuously increasing the measured friction force value.

[0043] When the force on the upper groove is sufficient to overcome the friction between the upper and lower grooves, the upper groove will move at a constant speed on the lower groove. At this point, the friction force value read from the external control system will stabilize and no longer increase. This allows us to measure the sliding friction force between the upper and lower grooves. Furthermore, since the test process is continuous, data such as the maximum static friction force can also be obtained from the collected data. like Figures 6 to 8 The image shows a second specific embodiment of the present invention. Unlike the first embodiment, this embodiment does not use a push spring 5. Instead, a mounting cover 62 is fixedly installed at the bottom of the movable rod 6. A protective spring 64 is fixedly installed inside the mounting cover 62. A second mounting cover 63 is fixedly installed on the other end of the protective spring 64. A protective shell 7 is fixedly installed at the bottom of the second mounting cover 63.

[0044] This embodiment has its own advantages and disadvantages compared to the first embodiment, as detailed below: In the first embodiment, a push spring 5 is used. When the push spring 5 pushes the pressure handle 3 upward, it also pushes the various components connected to the pressure handle 3 upward. Therefore, the push spring 5 needs to have a large elastic coefficient, which will result in a large force required to compress the push spring 5, thus increasing the labor intensity of the workers. However, this also allows the spring piece 73 to be raised to a certain height, so that the bent part 76 does not abut against the second protective shell 71 after being raised. This prevents the bent part 76 from rubbing against the second protective shell 71 during the test, thereby eliminating the interference of the friction between the bent part 76 and the second protective shell 71 on the test results and helping to improve the accuracy of the test results.

[0045] In this embodiment, a protective spring 64 is used. The elastic force of the protective spring 64 only needs to push up the movable rod 6, sleeve 31, and pressure handle 3. Therefore, a smaller elastic coefficient can be selected for the protective spring 64, which helps to reduce the labor intensity of the workers. However, since the elastic force of the protective spring 64 will push the bent part 76 downward, friction will occur between the bent part 76 and the second protective shell 71 during the test. This friction will introduce interference from the bent part 76 and the second protective shell 71 into the test data, which is not conducive to improving the accuracy of the test results.

[0046] It should be emphasized that, based on the content described above, although the beneficial effects of the present invention have been explained in detail and corresponding specific embodiments have been provided, those skilled in the art can still achieve the same technical effects by making conventional substitutions, modifications, or other alterations to the given technical solutions without creative effort, provided they fully understand the working principle of the present invention. However, such modifications should not be considered as exceeding the scope of the present invention. Specifically, the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for detecting the friction of an automotive seat slide rail, characterized in that, The device includes an electric guide rail (1), a mounting bracket (2) on the electric guide rail (1), a pressure handle (3) rotatably mounted on the mounting bracket (2), a limit block (4) fixedly mounted on the mounting bracket (2), a limit hole (61) on the limit block (4), a movable rod (6) movably mounted in the limit hole (61), a sleeve (31) rotatably mounted on the top of the movable rod (6), and the sleeve (31) sleeved on the pressure handle (3); a spring piece (73) is provided at the bottom of the movable rod (6), a strain gauge (74) is fixedly mounted on the side of the spring piece (73), the spring piece (73) deforms by utilizing the friction between the guide rails to be tested, and the strain gauge (74) is used to detect the deformation of the spring piece (73) to reflect the friction between the guide rails to be tested; a magnet (72) for adsorbing the upper groove of the slide rail is provided at the bottom of the spring piece (73); a fixed seat (11) is provided below the magnet (72).

2. The automobile seat slide rail friction detection device according to claim 1, characterized in that, A locking tooth (27) is fixedly installed on the pressure handle (3). An installation groove (25) is provided on the mounting bracket (2). A return spring (23) is fixedly installed in the installation groove (25). A locking tooth (24) is fixedly installed on the other end of the return spring (23). The locking tooth (24) is used to abut against the locking tooth (27). A connecting hole (21) is provided on the mounting bracket (2). The connecting hole (21) is connected to the installation groove (25). A paddle (22) is rotatably installed in the connecting hole (21). A slot (26) is provided on the locking tooth (24). The paddle (22) abuts against the slot (26).

3. The automobile seat slide rail friction detection device according to claim 2, characterized in that, A limiting tooth (28) is fixedly installed on the first locking tooth (27), and a limiting groove (29) is opened on the second locking tooth (24). The limiting groove (29) is used to accommodate the limiting tooth (28), and the limiting tooth (28) and the limiting groove (29) cooperate in an abutting manner.

4. The automobile seat slide rail friction detection device according to claim 2, characterized in that, The bottom end of the movable rod (6) is provided with a protective shell one (7), the top end of the spring piece (73) is fixedly connected to the inside of the protective shell one (7), the bottom end of the spring piece (73) is provided with a protective shell two (71), the protective shell two (71) is used to abut against the protective shell one (7), and the magnet (72) is fixedly installed on the bottom end of the outside of the protective shell two (71).

5. The automobile seat slide rail friction detection device according to claim 4, characterized in that, The spring (73) includes a bending part (76) and a testing part (75). The bending part (76) is connected to the second protective shell (71), and the strain gauge (74) is fixedly installed on the testing part (75).

6. The automobile seat slide rail friction detection device according to claim 5, characterized in that, The bent portion (76) is fixedly installed on the side of the test portion (75). A groove plate (77) is fixedly installed inside the second protective shell (71). A sliding groove (771) is provided on the groove plate (77). A sliding rod (772) is fixedly installed on the bent portion (76). The sliding rod (772) is located inside the sliding groove (771). A floating groove (751) is provided inside the second protective shell (71). The lower end of the test portion (75) is inserted into the floating groove (751).

7. The automobile seat slide rail friction detection device according to claim 6, characterized in that, A push spring (5) is fixedly installed on the limiting block (4), and the other end of the push spring (5) is fixedly connected to the pressure handle (3).

8. The automobile seat slide rail friction detection device according to claim 6, characterized in that, The bottom end of the movable rod (6) is fixedly installed with a first mounting cover (62), a protective spring (64) is fixedly installed inside the first mounting cover (62), and a second mounting cover (63) is fixedly installed on the other end of the protective spring (64); the first protective shell (7) is fixedly installed at the bottom end of the second mounting cover (63).

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