Bending resistance testing device of headphone

Abstract

The invention provides an anti-bending testing device for headphones, which comprises a frame, a driving mechanism is mounted at the bottom of an inner cavity of the frame, two groups of clamping mechanisms are slidably connected to the inner cavity of the frame, the driving mechanism drives the two groups of clamping mechanisms to get close to each other or get away from each other, and each clamping mechanism comprises a clamping seat. A mounting air bag is arranged in an inner cavity of the clamping seat, a sample loading plate is slidably connected to the inner wall of the clamping seat and located at the top of the mounting air bag, the sample loading plate comprises a storage plate, locking mechanisms are mounted at the two ends of the upper end face of the storage plate, and each locking mechanism comprises a locking assembly and a limiting assembly. The limiting assembly limits rotation of the locking assembly in a single direction. By arranging the clamping mechanism, the clamping firmness of the clamping mechanism on the two ends of the headband is improved, the situation that the headband slips off in the testing process and influences the testing result is avoided, and meanwhile, headbands of various width models can be clamped and locked.

Description

Technical Field

[0001] The invention relates to the field of earphone performance testing, in particular to a bending resistance testing device for a headphone. Background Art

[0002] Headphones are popular among consumers because of their good sound field, excellent sound quality, good comfort, and non-in-ear design, which avoids scratching the ear canal and protects the eardrum. Common headphones are composed of five parts: headband, ear shell, driver, wire, and ear pad. Headphones need to stretch the headband to wear and take it off. The bending performance and strength of the headband are directly related to the user's comfort when wearing it, as well as the service life of the headphones.

[0003] Existing bending test devices mostly test the bending properties of straight materials such as straight plates, rods, and tubes, and most of them are single tests. When conducting a bending test on a headband, the effect of the bending test will be affected by the bending shape of the headband. At the same time, when the headband is worn and removed, the headband is stretched and contracted through the ear shells at both ends of the headband, which is essentially different from the existing point pressure test. Moreover, when conducting a bending durability test, the sample is prone to fall off or collapse, affecting the test results and the safety of the tester. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a bending resistance testing device for headphones to solve the problems raised in the above background technology.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: A bending resistance test device for headphones, comprising a frame, a driving mechanism is installed at the bottom of the inner cavity of the frame, two groups of clamping mechanisms are slidably connected to the inner cavity of the frame, and the driving mechanism drives the two groups of clamping mechanisms to move closer to or away from each other;

[0008] The frame comprises a test box, the inner wall of which is fixedly connected to a mounting plate, the upper surface of the mounting plate is provided with a convex sliding groove, the lower surface of the mounting plate is provided with a clearance groove, and the clearance groove is connected to the convex sliding groove;

[0009] The driving mechanism comprises a motor and an eccentric wheel, the motor drives the eccentric wheel to rotate, the front and rear end surfaces of the eccentric wheel are rotatably connected to two sets of driving plates at eccentric positions, and the two sets of driving plates are rotatably connected to a set of lower end surfaces of the clamping mechanism at the sides away from the eccentric wheel;

[0010] The clamping mechanism includes a clamping seat, an inner cavity of the clamping seat is provided with a mounting airbag, an inner wall of the clamping seat is slidably connected with a sample loading plate, the sample loading plate is located on the top of the mounting airbag, the sample loading plate includes a storage plate, both ends of the storage plate are fixedly connected with sliders, locking mechanisms are installed at both ends of the upper end surface of the storage plate, and a plurality of groups of spherical fixing blocks are fixedly connected to the lower end surface of the storage plate at intervals. The locking mechanism includes a locking plate, a locking assembly is rotatably connected to the inner cavity of the locking plate, a limiting assembly is installed in the inner cavity of the locking plate, and the limiting assembly limits the rotation of the locking assembly in one direction.

[0011] As a further preference, the output end of the motor is fixedly connected to a drive shaft, the outer wall of the drive shaft is fixedly connected to a gear, the gear is meshed with the eccentric wheel gear, the front end surface of the eccentric wheel is provided with two groups of adjustment grooves, the two groups of adjustment grooves are arranged at an angle of 90 degrees, an adjustment seat is selectively slidably connected in the adjustment groove, and the adjustment seat is rotatably connected to one end of the drive plate.

[0012] As a further preference, the adjustment seat includes an adjustment rod, one end of the adjustment rod is fixedly connected to a fixed knob, the end of the adjustment rod facing away from the fixed knob passes through the adjustment slot and is rotatably connected to the adjustment knob, the fixed knob is rotatably connected to a rotating seat on the side facing away from the adjustment rod, and the drive plate is fixedly connected to the outer wall of the rotating seat.

[0013] As a further preference, the clamping seat includes a clamping box, the lower end face of the clamping box is fixedly connected to a convex base, the upper end face of the clamping box is provided with a mounting groove, the side walls of the mounting groove are symmetrically provided with two groups of longitudinal sliding grooves, and the bottom of the mounting groove is provided with a plurality of groups of spherical grooves spaced apart, and the spherical grooves are adapted to the spherical fixing block.

[0014] As a further preference, the locking plate comprises a plate body, and two groups of adjacent sides of the plate bodies are provided with rotation groove regulating grooves.

[0015] As a further preference, the locking assembly includes a rotating shaft, both ends of which are rotatably connected to the side walls of the regulating groove, an elliptical roller is fixedly connected to the outer wall of the rotating shaft, a plurality of groups of limiting grooves are spaced apart on the outer wall of the elliptical roller, and a portion of the elliptical roller extends to the outside of the regulating groove.

[0016] As a further preferred embodiment, the limit assembly includes a mounting shaft and two groups of reset blocks, the outer wall of the mounting shaft is fixedly connected to a cylindrical roller, the outer wall of the cylindrical roller is fixedly connected to a limit wedge block, the two groups of reset blocks are respectively installed at both ends of the mounting shaft, and the reset blocks are fixedly connected to the side walls of the mounting and regulating groove.

[0017] As a further preference, a torsion spring is installed in the reset block, one end of the torsion spring is fixedly connected to the installation shaft, and the other end of the torsion spring is fixedly connected to the inner wall of the reset block.

[0018] As a further preference, the installation airbag comprises an airbag, and a plurality of groups of anti-slip wedges are symmetrically fixedly connected to the upper end surface of the airbag.

[0019] Beneficial Effects

[0020] The present invention provides a device for testing the bending resistance of headphones, which has the following beneficial effects:

[0021] 1. The device is provided with a clamping mechanism, and the two ends are respectively placed on the upper ends of the storage plate, and the two longitudinal sides of the headband are fixed by the locking mechanisms at the two ends. The storage plate is pushed downward by the headband, and the lower end of the storage plate squeezes the airbag to deform until the spherical fixing block moves to the inside of the spherical groove and engages with the spherical groove to fix the height of the storage plate. At this time, the deformed airbags are squeezed out from both sides of the storage plate, and the extruded airbags squeeze and fix the lateral sides of the headband. At the same time, the anti-slip wedge block does not affect the headband pushing the storage plate downward, while increasing the friction between the headband and the airbag when it moves upward, thereby increasing the firmness of the clamping mechanism to clamp the two ends of the headband, avoiding the slippage of the headband during the test and affecting the test results. At the same time, a transparent protective plate is provided on the top of the test box to avoid the danger of the headband breaking and collapsing during the test.

[0022] 2. By setting a locking mechanism, the longitudinal sides of the headband are pushed downward in a direction perpendicular to the outer wall of the elliptical roller, thereby driving the elliptical roller to push the limiting wedge to roll inward. Due to the unequal diameter characteristics of the elliptical roller, the spacing between the two groups of elliptical rollers changes with the rotation of the elliptical roller, so that headbands of different widths can be clamped. At the same time, the torsion spring pushes the limiting wedge to extend into the limiting groove to limit the elliptical roller and limit the reversal of the elliptical roller to avoid the test sample falling off during the test, thereby improving the stability of the elliptical roller fixing the longitudinal sides of the headband. At the same time, headbands of various widths can be clamped. After the test, the test sample is pulled up by hand. At this time, the elliptical roller pushes the limiting wedge to rotate, causing the torsion spring to deform, thereby releasing the limiting wedge on the elliptical roller. At this time, the elliptical roller reverses to remove the test sample. At the same time, the torsion spring pushes the limiting wedge to reset, and the elliptical roller is re-locked in one direction.

[0023] 3. By setting up a driving mechanism, the motor drives the eccentric wheel to rotate through the gear, and the eccentric wheel drives the two sets of clamping seats to reciprocate closer or farther through the driving plate, thereby simulating the daily use of the headband to test the bending strength and durability of the headband. By turning the adjusting knob to adjust the position of the rotating seat in the adjusting slot, the eccentric spacing of the driving point of the driving plate is adjusted to achieve the purpose of adjusting the reciprocating distance. The bending strength of the headband is tested by recording the moving distance. At the same time, the bending durability of the headband can also be tested within the range of different bending strengths. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1It is a schematic structural diagram of a bending resistance testing device for headphones of the present invention;

[0025] Figure 2 It is a schematic diagram of the framework structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the driving mechanism structure of the present invention;

[0027] Figure 4 It is a schematic diagram of the structure of the adjustment seat of the present invention;

[0028] Figure 5 It is a schematic diagram of the structure of the clamping mechanism of the present invention;

[0029] Figure 6 It is a schematic diagram of the cross-sectional structure of the clamping seat of the present invention;

[0030] Figure 7 It is a schematic diagram of a half-section structure of a sample loading plate of the present invention;

[0031] Figure 8 It is a partial cross-sectional schematic diagram of the locking mechanism of the present invention;

[0032] Fig. 9 It is a schematic diagram of the cross-sectional structure of the locking plate portion of the present invention;

[0033] Fig.10 It is a schematic diagram of the locking assembly structure of the present invention;

[0034] Fig.11 It is a schematic diagram of the structure of the limit assembly of the present invention;

[0035] Fig.12 It is a schematic diagram of the airbag installation structure of the present invention.

[0036] In the figure: 1 frame, 11 test box, 12 give way groove, 13 convex slide groove, 14 mounting plate, 15 transparent protective plate, 2 driving mechanism, 21 motor, 22 driving shaft, 23 gear, 24 eccentric wheel, 25 adjustment groove, 26 adjustment seat, 261 adjustment knob, 262 adjustment rod, 263 fixed knob, 264 rotating seat, 27 driving plate, 3 clamping mechanism, 4 clamping seat, 41 mounting groove, 42 spherical groove, 43 longitudinal slide groove, 44 clamping box , 45 convex base, 5 sample plate, 51 storage plate, 52 slider, 53 locking mechanism, 531 locking plate, 5311 plate body, 5312 regulating groove, 532 locking assembly, 5321 elliptical roller, 5322 rotating shaft, 5323 limiting groove, 533 limiting assembly, 5331 mounting shaft, 5332 reset block, 5333 limiting wedge block, 5334 cylindrical roller, 54 spherical fixing block, 6 mounting airbag, 61 airbag, 62 anti-slip wedge block. DETAILED DESCRIPTION

[0037] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0041] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can appreciate the application of other processes and / or the use of other materials.

[0042] An embodiment of the present invention provides a bending resistance testing device for headphones, comprising a frame 1 , a driving mechanism 2 and two groups of clamping mechanisms 3 .

[0043] See also Figures 1 to 5 The frame 1 includes a test box 11, the inner wall of the test box 11 is fixedly connected to a mounting plate 14, the upper end surface of the mounting plate 14 is provided with a convex slide groove 13, the lower end surface of the mounting plate 14 is provided with a clearance groove 12, the clearance groove 12 is connected to the convex slide groove 13, the top of the test box 11 is fixedly connected to a transparent protective plate 15, the driving mechanism 2 includes a motor 21, the motor 21 is installed at the bottom of the inner cavity of the test box 11, the output end of the motor 21 is fixedly connected to a drive shaft 22, the outer wall of the drive shaft 22 is fixedly connected to a gear 23, the gear 23 is meshingly connected to an eccentric wheel 24, the front end surface of the eccentric wheel 24 is provided with two groups of adjustment grooves 25, the two groups of adjustment grooves 25 are arranged at 90 degrees, and an adjustment seat 26 is installed in the adjustment groove 25, and the adjustment seat 26 rotates The eccentric wheel 24 is rotatably connected to the driving plate 27. Two groups of driving plates 27 are respectively arranged on the front and rear end surfaces of the eccentric wheel 24. The clamping mechanism 3 includes a clamping seat 4. The inner cavity of the clamping seat 4 is installed with a mounting airbag 6. A sample plate 5 is installed on the top of the mounting airbag 6. Both ends of the sample plate 5 are slidably connected to the inner wall of the clamping seat 4. The sample plate 5 slides with the test sample to the bottom of the clamping seat 4 to squeeze the mounting airbag 6 to deform, and the deformed mounting airbag 6 is used to squeeze and fix the two sides of the test sample. The lower end of the clamping seat 4 is slidably connected in the convex slide groove 13, and the end of the driving plate 27 away from the adjusting seat 26 passes through the makeshift groove 12 and is rotatably connected to the lower end surface of the clamping seat 4. The motor 21 works to drive the eccentric wheel 24 to rotate, and drives the two groups of clamping seats 4 to move closer or farther away from each other through the driving plate 27.

[0044] For details, please refer to Figure 4The adjustment seat 26 includes an adjustment rod 262, one end of which is fixedly connected to a fixed knob 263, the other end of the adjustment rod 262 passes through the adjustment slot 25 and is rotatably connected to an adjustment knob 261, the fixed knob 263 is rotatably connected to a rotating seat 264 on the side away from the adjustment rod 262, and the driving plate 27 is fixedly connected to the outer wall of the rotating seat 264. By tightening or loosening the adjustment knob 261, the adjustment rod 262 can be controlled to lock or slide in the adjustment slot 25, and the eccentric spacing can be adjusted, thereby controlling the moving distance of the clamping seat 4.

[0045] See also Figure 6 and Figure 7 The clamping seat 4 includes a clamping box 44, a convex base 45 is fixedly connected to the lower end surface of the clamping box 44, and the convex base 45 is slidably connected in the convex slide groove 13. A mounting groove 41 is opened on the upper end surface of the clamping box 44, and longitudinal slide grooves 43 are symmetrically opened on the side walls of the mounting groove 41. A plurality of groups of spherical grooves 42 are spaced apart at the bottom of the mounting groove 41. The sample loading plate 5 includes a storage plate 51, and sliders 52 are fixedly connected at both ends of the storage plate 51. The sliders 52 are slidably connected in the longitudinal slide groove 43. A plurality of groups of spherical fixing blocks 54 are fixedly connected at intervals on the lower end surface of the storage plate 51. The spherical fixing blocks 54 are hemispherical, and their positions and shapes correspond to the spherical grooves 42. Locking mechanisms 53 are installed at both ends of the upper end surface of the storage plate 51. Two groups of locking mechanisms 53 clamp and fix the test samples on the upper end of the storage plate 51.

[0046] For details, please refer to Figure 8 In order to improve the firmness of the locking mechanism 53 on both sides of the test sample, the locking mechanism 53 includes a locking plate 531, and the inner cavity of the locking plate 531 is rotatably connected to a locking component 532. The inner cavity of the locking plate 531 is installed with a limiting component 533, and the limiting component 533 limits the rotation of 522 in one direction.

[0047] For details, please refer to Figures 9 to 11In order to fix the test samples of different widths, the locking plate 531 includes a plate body 5311, which is symmetrically fixedly connected to the two ends of the upper end surface of the storage plate 51, and the two sets of plate bodies 5311 are provided with 5313 on the adjacent sides, a rotating groove regulating groove 5312, and a locking component 532 includes a rotating shaft 5322, and the two ends of the rotating shaft 5322 are rotatably connected to the side walls of the regulating groove 5312 on both sides, and the outer wall of the rotating shaft 5322 is fixedly connected to the elliptical roller 5321, and the outer wall of the elliptical roller 5321 is spaced apart. A plurality of groups of limiting grooves 5323 are provided, and a portion of the elliptical roller 5321 extends to the outer wall of the regulating groove 5312. When loading the sample, the longitudinal sides of the test sample push the elliptical roller 5321 to rotate respectively, and the elliptical roller 5321 is used to clamp the test samples of different widths by using the unequal diameter characteristics. The limiting assembly 533 includes a mounting shaft 5331, and both ends of the mounting shaft 5331 are fixedly connected with a reset block 5332, and the reset block 5332 is fixedly connected in the regulating groove 5312. The outer wall of the mounting shaft 5331 is fixedly connected with The cylindrical roller 5334 has a fixedly connected limiting wedge 5333 on its outer wall. The limiting wedge 5333 is wedge-shaped. The limiting wedge 5333 is pushed by the reset block 5332 to cooperate with the limiting groove 5323 to lock the elliptical roller 5321 in one direction to prevent the elliptical roller 5321 from rotating in the opposite direction and causing the test sample to fall off. When the elliptical roller 5321 rotates inward when pushing the sample to the bottom of the storage plate 51, the limiting wedge 5333 has no limiting effect. When the sample is moved outward by external force during testing, The limiting wedge block 5333 limits the elliptical roller 5321 from rotating outward to prevent the sample from falling off. After the test is completed, the test sample can be directly held and pulled up, so that the elliptical roller 5321 pushes the limiting wedge block 5333 in the opposite direction to drive the torsion spring to deform. The limiting wedge block 5333 limits the contact with the limiting groove 5323 in one direction, and the test sample is directly removed. After the sample leaves the storage plate 51, the torsion spring pushes the limiting wedge block 5333 to reset, and the elliptical roller 5321 is locked for unidirectional rotation again.

[0048] It should be noted that, before clamping, the long axes of the two groups of elliptical rollers 5321 are arranged perpendicular to the placement plate 51. As the sample is pushed downward along the outer wall of the elliptical rollers 5321, the elliptical rollers 5321 rotate to clamp the two sides of the sample.

[0049] For details, please refer to Fig.12 In order to improve the clamping stability of the installation airbag 6 on the lateral sides of the test sample, the installation airbag 6 includes an airbag 61, and a plurality of groups of anti-slip wedges 62 are symmetrically and fixedly connected to the upper end surface of the airbag 61. The anti-slip wedges 62 are wedge-shaped, and the thickness of each group of anti-slip wedges 62 decreases from the edge to the center line to increase the friction when the test sample moves upward.

[0050] It should be noted that the anti-slip wedge blocks 62 are symmetrically distributed along a center line parallel to the sample mounting plate 5 .

[0051] In summary, the present invention provides a bending resistance testing device for headphones. Loosen the adjusting knob 261, control the position of the adjusting rod 262 in the adjusting slot 25, set the test range of the test sample, and then control the motor 21 to work, adjust the two groups of driving plates 27 to the minimum distance between the two groups of convex bases 45, and the motor 21 continues to work to adjust the distance between the two groups of convex bases 45 to a distance suitable for loading the sample. The motor 21 stops, and pushes one end of the test sample toward the bottom of the storage plate 51 in a direction perpendicular to the locking mechanism 53. The elliptical rollers 5321 on both sides of the test sample push the limiting wedge 5333 to rotate inwardly. As the elliptical rollers 5321 rotate, the distance between the two groups of elliptical rollers 5321 gradually decreases, thereby fixing the two sides of the test sample in the longitudinal direction. At the same time, the limiting wedge 5333 cooperates with the limiting groove 5323 to avoid The elliptical roller 5321 rotates in the opposite direction, causing the clamping to loosen. The test sample is held in the hand and pushes the storage plate 51 to make the slider 52 move downward along the longitudinal slide groove 43. The storage plate 51 squeezes the airbag 61 to deform until the spherical fixing block 54 moves to the inside of the spherical groove 42 and engages with the spherical groove 42, thereby fixing the height of the storage plate 51. At this time, the deformed airbag 61 squeezes and fixes the test sample on both sides of the lateral direction. At the same time, the anti-slip wedge block 62 increases the friction force of the test sample to slip outward, clamps and fixes the test sample in both the longitudinal and transverse directions, and increases the stability of the test sample clamping. The motor 21 works through the eccentric wheel 24 and the driving plate 27 to drive the two groups of clamping mechanisms 3 to reciprocate and move closer to or away from each other, and clamps the two ends of the test sample by installing the sample plate 5 and installing the airbag 6, and simulates the force mode of daily wearing and taking off to test the bending strength and bending performance of the test sample.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bending resistance test device for headphones, comprising a frame (1), characterized in that: A driving mechanism (2) is installed at the bottom of the inner cavity of the frame (1), and two groups of clamping mechanisms (3) are slidably connected to the inner cavity of the frame (1), and the driving mechanism (2) drives the two groups of clamping mechanisms (3) to move closer to or farther from each other; The frame (1) comprises a test box (11), the inner wall of the test box (11) is fixedly connected with a mounting plate (14), the upper end surface of the mounting plate (14) is provided with a convex sliding groove (13), the lower end surface of the mounting plate (14) is provided with a clearance groove (12), and the clearance groove (12) is connected with the convex sliding groove (13); The driving mechanism (2) comprises a motor (21) and an eccentric wheel (24), wherein the motor (21) drives the eccentric wheel (24) to rotate, and the eccentric positions of the front and rear end surfaces of the eccentric wheel (24) are respectively rotatably connected to two groups of driving plates (27), and the two groups of driving plates (27) are respectively rotatably connected to the lower end surface of one group of the clamping mechanism (3) on the side away from the eccentric wheel (24); The clamping mechanism (3) comprises a clamping seat (4), the inner cavity of the clamping seat (4) is provided with a mounting airbag (6), the inner wall of the clamping seat (4) is slidably connected with a sample loading plate (5), the sample loading plate (5) is located on the top of the mounting airbag (6), the sample loading plate (5) comprises a storage plate (51), both ends of the storage plate (51) are fixedly connected with sliders (52), the upper end surface of the storage plate (51) is installed with locking mechanisms (53) at both ends, the lower end surface of the storage plate (51) is fixedly connected with a plurality of groups of spherical fixing blocks (54) at intervals, the locking mechanism (53) comprises a locking plate (531), the inner cavity of the locking plate (531) is rotatably connected with a locking assembly (532), the inner cavity of the locking plate (531) is installed with a limiting assembly (533), the limiting assembly (533) limits the rotation of the locking assembly (532) in one direction.

2. The bending resistance testing device for headphones according to claim 1, characterized in that: The output end of the motor (21) is fixedly connected to a driving shaft (22), the outer wall of the driving shaft (22) is fixedly connected to a gear (23), the gear (23) is meshed with the gear of the eccentric wheel (24), the front end surface of the eccentric wheel (24) is provided with two groups of adjustment grooves (25), the two groups of adjustment grooves (25) are arranged at an angle of 90 degrees, an adjustment seat (26) is selectively slidably connected in the adjustment groove (25), and the adjustment seat (26) is rotatably connected to one end of the driving plate (27).

3. The bending resistance testing device for headphones according to claim 2, characterized in that: The adjustment seat (26) comprises an adjustment rod (262), one end of the adjustment rod (262) is fixedly connected to a fixed knob (263), one end of the adjustment rod (262) away from the fixed knob (263) passes through the adjustment slot (25) and is rotatably connected to the adjustment knob (261), the side of the fixed knob (263) away from the adjustment rod (262) is rotatably connected to a rotating seat (264), and the driving plate (27) is fixedly connected to the outer wall of the rotating seat (264).

4. The bending resistance testing device for headphones according to claim 1, characterized in that: The clamping seat (4) comprises a clamping box (44), the lower end surface of the clamping box (44) is fixedly connected to a convex base (45), the upper end surface of the clamping box (44) is provided with a mounting groove (41), the side wall of the mounting groove (41) is symmetrically provided with two groups of longitudinal sliding grooves (43), and the bottom of the mounting groove (41) is provided with a plurality of groups of spherical grooves (42) at intervals, and the spherical grooves (42) are adapted to the spherical fixing block (54).

5. The bending resistance testing device for headphones according to claim 1, characterized in that: The locking plate (531) comprises a plate body (5311), and two sets of adjacent sides of the plate bodies (5311) are provided with rotation groove regulating grooves (5312).

6. The device for testing the bending resistance of headphones according to claim 5, characterized in that: The locking assembly (532) comprises a rotating shaft (5322), both ends of which are rotatably connected to the side walls of the regulating groove (5312), an elliptical roller (5321) is fixedly connected to the outer wall of the rotating shaft (5322), a plurality of groups of limiting grooves (5323) are spaced apart on the outer wall of the elliptical roller (5321), and a portion of the elliptical roller (5321) extends to the outside of the regulating groove (5312).

7. The device for testing the bending resistance of headphones according to claim 6, characterized in that: The limiting assembly (533) includes a mounting shaft (5331) and two groups of reset blocks (5332); a cylindrical roller (5334) is fixedly connected to the outer wall of the mounting shaft (5331); a limiting wedge block (5333) is fixedly connected to the outer wall of the cylindrical roller (5334); the two groups of reset blocks (5332) are respectively mounted at both ends of the mounting shaft (5331), and the reset blocks (5332) are fixedly connected to the side walls of the mounting and regulating groove (5312).

8. The headphone bending resistance testing device according to claim 7, characterized in that: A torsion spring is installed in the reset block (5332), one end of the torsion spring is fixedly connected to the installation shaft (5331), and the other end of the torsion spring is fixedly connected to the inner wall of the reset block (5332).

9. The headphone bending resistance testing device according to claim 1, characterized in that: The installation airbag (6) comprises an airbag (61), and a plurality of groups of anti-slip wedge blocks (62) are symmetrically fixedly connected to the upper end surface of the airbag (61).

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