A clamp for squeak testing

Abstract

This utility model discloses a fixture for testing abnormal sounds, including a body with a first inner cavity and a positioning recess; a support block disposed in the first inner cavity and having a second inner cavity; a rotating member disposed in the second inner cavity and hinged to the support block, with a pressing end and a pushing end on both sides, the pressing end driving the pushing end to rotate upward; multiple grippers disposed in the first inner cavity and distributed around the periphery of the positioning recess, hinged to the body in the middle; and multiple elastic members disposed between the grippers and the body or support block, the elastic members driving the upper end of the grippers to rotate towards the positioning recess. The pressing end causes the pushing end to push the grippers upward, causing the lower end of the grippers to rotate upward while the upper end rotates away from the positioning recess, facilitating the placement or removal of the test piece in the positioning recess. Releasing the pressing end causes the elastic members to rotate the upper end of the grippers back to its original position and clamp the test piece, thus fixing it in place. The entire clamping structure is simple and easy to operate, improving the overall testing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, and in particular to a fixture for testing abnormal sounds. Background Technology

[0002] A fan is a structure that generates airflow and dissipates heat to cool down. Its main structure consists of a drive motor and fan blades. It is suitable for various structures and environments. Nowadays, fans are used for heat dissipation in many electronic systems such as automotive electronic systems, computers, and televisions. These fans often have coils set on the PCB as stators and magnetic poles set on the fan blades as rotors to make the fan blades rotate and blow air to dissipate heat.

[0003] For this type of fan, the inspection after manufacturing mainly relies on the inspector's hearing to distinguish the fan, and the operator manually clamps the fan for testing. This method is extremely inefficient and labor-intensive. In the process of mechanical testing, simple positioning blocks and clamps are used to fix the fan. This method cannot effectively clamp the PCB part, and improper control can easily clamp the fan blades, causing damage to the fan. Therefore, it is necessary to design a clamp to hold this type of fan so that it can be placed in a soundproof box for mechanized testing. Utility Model Content

[0004] This invention provides a fixture for testing abnormal sounds, aiming to solve at least one of the technical problems existing in the prior art.

[0005] The technical solution of this utility model relates to a fixture for testing abnormal sounds, characterized in that it includes:

[0006] The body has a first inner cavity, and the upper end surface of the body has a positioning recess for placing the test piece;

[0007] A support block is disposed in the first inner cavity, and the support block has a second inner cavity, which is connected to the first inner cavity;

[0008] A rotating component is located in the second inner cavity and hinged to the support block. It has a pressing end and a pushing end on its two sides. The pressing end extends out of the support block and the body, and the pushing end is located in the first inner cavity. The pressing end is used to drive the pushing end to rotate upward.

[0009] Multiple grippers are disposed in the first inner cavity and distributed around the periphery of the positioning recess. The middle part of the gripper is hinged to the body. The lower end of the gripper is located above the pushing end. The upper end of the gripper extends out of the body. The pushing end pushes the lower end of the gripper upward, causing the upper end of the gripper to rotate away from the positioning recess.

[0010] Multiple elastic elements are respectively disposed between the gripper and the body or between the gripper and the support block. The elastic elements are used to drive the upper end of the gripper to rotate toward the positioning recess.

[0011] According to some embodiments of the present invention, the plurality of grippers are arranged in a circular array around the central axis of the positioning recess.

[0012] According to some embodiments of the present invention, the pushing end is provided with an upward spherical surface, the center of the spherical surface is located on the central axis, and the spherical surface is used to push the lower end of the gripper upward.

[0013] According to some embodiments of the present invention, the lower end of the gripper has a protrusion extending laterally, the protrusion being located above the spherical surface, and the spherical surface being used to push the protrusion upward.

[0014] According to some embodiments of the present invention, the upper end of the gripper is provided with a clamping block, and the upper end of the clamping block is provided with an anti-detachment inclined surface in the direction of the central axis.

[0015] According to some embodiments of the present invention, the elastic element is positioned higher than the hinge point of the gripper, and the elastic element is configured as a compression spring.

[0016] According to some embodiments of the present invention, the elastic element is positioned below the hinge point of the gripper, and the elastic element is configured as a tension spring.

[0017] According to some embodiments of the present invention, the pressing end is provided with an upward-facing protrusion for pressing.

[0018] According to some embodiments of the present invention, a wiring groove is provided on one side of the positioning recess.

[0019] According to some embodiments of the present invention, the body includes an upper panel, a fixing block, and a lower panel connected sequentially from top to bottom. The support block is disposed between the upper panel and the lower panel. The first panel, the fixing block, the lower panel, and the support block together define the first inner cavity. The positioning recess is disposed on the upper end surface of the upper panel.

[0020] The beneficial effects of this utility model are as follows:

[0021] 1. The test piece is positioned and placed using the positioning recess. Pressing the pressing end of the rotating component causes it to rotate, which in turn pushes the lower end of the gripper upwards. As the lower end of the gripper rotates upwards, its upper end rotates away from the positioning recess, opening the gripper and facilitating the placement or removal of the test piece from the positioning recess. After placement, releasing the pressing end allows the upper end of the gripper to rotate back to its original position under the action of the elastic component, clamping the test piece and keeping it fixed for subsequent testing. The entire clamping structure is simple and easy to operate, improving overall testing efficiency. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a soundproof box according to an embodiment of the present utility model;

[0023] Figure 2 This is a schematic diagram of the structure behind the hidden door and dust cover of the soundproof box according to an embodiment of this utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the testing device according to an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of the second radio receiver component according to an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the overall structure of the clamp according to an embodiment of the present utility model;

[0027] Figure 6 This is a cross-sectional view of the clamp according to an embodiment of the present utility model.

[0028] Icon labels:

[0029] Box body 100, shock absorber 110, dust cover 120, base frame 130, first shock absorber pad 140, second shock absorber pad 150;

[0030] Swing arm 200, drive assembly 210, first base 211, first support seat 212, motor 213, first mounting plate 214, rotating shaft 215, first microphone assembly 220, L-shaped bracket 221, U-shaped clamping structure 222, first microphone 223, second microphone assembly 230, first adjusting rod 231, first locking block 232, second adjusting rod 233, second locking block 234, second microphone 235, mounting rod 236, clamp 237, pressing assembly 240, base plate 241, cylinder 242, pressure plate 243, support assembly 250, second base 251, second support seat 252, rotating rod 253, second mounting plate 254;

[0031] The main body 300 includes a first inner cavity 301, a positioning recess 302, a wiring groove 303, an upper panel 304, a fixing block 305, a lower panel 305, a support block 310, a second inner cavity 311, a rotating component 320, a pressing end 321, a pushing end 322, a gripper 330, a protrusion 331, a clamping block 332, an anti-detachment inclined surface 333, and an elastic component 340. Detailed Implementation

[0032] The following will describe several embodiments of the present invention, including embodiments corresponding to the accompanying drawings. It should be understood that the drawings are used to assist in understanding the technical features and technical solutions of the present invention, and should not be construed as limiting the scope of protection of the present invention.

[0033] The following will provide a clear and complete description of the concept, specific structure, and technical effects of this utility model in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, solution, and effects of this utility model. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0034] It should be noted that, unless otherwise explicitly defined, when a feature is referred to as "fixed," "connected," "installed," or "set" on another feature, it can be "fixed," "connected," "installed," or "set" directly on the other feature, or it can be "fixed," "connected," "installed," or "set" on the other feature indirectly. The terms "fixed," "connected," "installed," and "set" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0035] It should be noted that the descriptions of orientations or positional relationships indicated by terms such as up, down, left, right, top, bottom, front, back, inside, and outside used in this utility model are based on the orientations or positional relationships indicated by the accompanying drawings or embodiments. They are only for the purpose of facilitating the description of this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] It should be noted that the term "and / or" used in this utility model includes any combination of one or more related listed items, "several" means one or more, "multiple" means at least two, "greater than", "less than", "exceeding" are understood to exclude the number itself, and "above", "below", "within" are understood to include the number itself.

[0037] It should be noted that the use of "first" and "second" in this utility model is only for the purpose of distinguishing technical features, and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0038] It should be noted that, unless otherwise expressly defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and not for limiting the scope of the invention.

[0039] Reference Figures 1 to 6 According to a first aspect embodiment of the present invention, a soundproof box for abnormal sound testing includes: a box body 100; a power component disposed on the outside of the box body 100, the output end of the power component passing through the box body 100 and connected to a rotating shaft 215, the motor 213 mentioned below being the power component here; a first base 211 disposed inside the box body 100, a first support seat 212 disposed on the first base 211, a bearing movably disposed in the first support seat 212, and the shaft of the rotating shaft 215 being movably connected to the bearing; a swing arm 200 connected to the rotating shaft 215 via a first mounting plate 214; a clamp disposed in the middle of the swing arm 200, the clamp being used to clamp the test piece; and a sound receiving module disposed inside the box body 100, used to receive the sound emitted by the test piece during the testing process.

[0040] The use of the aforementioned soundproof enclosure for noise testing offers at least the following advantages: The fan under test is clamped by a fixture, and the swing arm 200 is rotated by a power component. The sound-collecting module gathers the sound generated by the fan during the swing, allowing for analysis and judgment of any abnormal noise. The enclosure 100 isolates the test from external ambient noise, replacing the human hearing test with a soundproof enclosure, thus improving both testing efficiency and accuracy.

[0041] According to some embodiments of this utility model, the sound receiving module includes a first sound receiving component 220 and a second sound receiving component 230. The first sound receiving component 220 is disposed in the middle of the swing arm 200 and located on one side of the clamp. The second sound receiving component 230 is disposed in the housing 100 and located on the front / rear side of the swing arm 200. By fixing the first sound receiving component 220 to the middle of the swing arm 200, the first sound receiving component 220 swings together with the swing arm 200 during the swing process. That is, the first sound receiving component 220 is always in a relatively stopped state with respect to the fan under test. The second sound receiving component 220 is fixedly connected in the housing 100 and can be disposed on the front side or the rear side of the swing arm 200. The second sound receiving component 220 does not swing with the swing arm 200 and is in a state of relative motion with respect to the fan under test. By simultaneously performing sound receiving tests on the fan under test during the swing process through a static and a dynamic configuration, the test results are more comprehensive.

[0042] According to some embodiments of the present invention, the first microphone assembly 220 includes an L-shaped bracket 221 and a first microphone 223. The bottom end of the vertical section of the L-shaped bracket 221 is connected to the swing arm 200, and the end of the horizontal section of the L-shaped bracket 221 is located above the clamp. The first microphone 223 is detachably disposed at the end of the horizontal section of the L-shaped bracket 221. The end of the horizontal section of the L-shaped bracket 221 is provided with a U-shaped clamping structure 222. The first microphone 223 is detachably connected to the U-shaped clamping structure 222 by bolts. The first microphone 223 can be placed above the fan to be tested through the L-shaped bracket 221, and the height of the first microphone 223 can be adjusted by loosening the bolts while clamping the first microphone 223 through the cooperation of the U-shaped clamping structure 222 and the bolts.

[0043] According to some embodiments of this utility model, the second microphone assembly 230 includes: a first adjusting rod 231, vertically disposed on the front / rear side of the swing arm 200, with a first locking block 232 movable up and down on the first adjusting rod 231; a second adjusting rod 233, disposed horizontally with one end connected to the first locking block 232, and the other end of the second adjusting rod 233 having a second locking block 234 movable back and forth along the second adjusting rod 233; a mounting rod 236, disposed horizontally with one end connected to the second locking block 234; and a second microphone 235 connected to the other end of the mounting rod 236; wherein the first locking block 232 and the second locking block 234 are both locked and fixed by bolts, and the microphone can be adjusted by loosening the first locking block. The bolt on the side of the first adjusting rod 231 on the first locking block 232 can move the first locking block 232 up and down, so that the second microphone 235 can be adjusted in height. Loosening the bolt on the side of the first locking block 232 near the second adjusting rod 231, or loosening the bolt on the side of the second locking block 234 near the second adjusting rod 233, can move the first locking block 232 or the second locking block 234 back and forth, so that the back and forth position of the second microphone 235 can be adjusted. At the same time, the bolt on the side of the second locking block 234 near the mounting rod 236 can be loosened, so that the mounting rod 236 can move left and right relative to the second locking block 234, thereby adjusting the position of the second microphone 235 in the left and right direction.

[0044] According to some embodiments of this utility model, it also includes a clamp 237, which is hinged to the other end of the mounting rod 236 via a damping pivot. The second microphone 235 is connected to the clamp 237. The test angle of the second microphone 235 can be adjusted via the clamp 237. The damping pivot allows the clamp 237 to rotate while maintaining the corresponding angle on its own.

[0045] According to some embodiments of the present invention, a support assembly 250 is provided on the left side of the swing arm 200. The support assembly 250 includes a second base 251, a second support seat 252, a rotating rod 253, and a second mounting plate 254. The second base 251 is located on the left side of the swing arm 200, and the second support seat 252 is located above the second base 251. The rotating rod 253 is hinged to the second support seat 252. The left side of the swing arm 200 is connected to the rotating rod 253 through the second mounting plate 254. The support assembly 250 is used to support the left side of the swing arm 200 to avoid the swing arm 200 from generating excessive pressure and torque on the output end of the power component, which could lead to damage to the power component.

[0046] According to some embodiments of the present invention, the first base 211 and the second base 251 are both connected to the housing 100 through a shock absorber 110. The shock absorber 110 further eliminates the influence of vibrations caused by the power components and vibrations generated by the external environment, thereby improving the accuracy of the test.

[0047] According to some embodiments of this utility model, a dust cover 120 is also provided on the outside of the power component. The dust cover 120 is attached to the side of the housing 100 and is used to protect the power component and prevent dust from entering the power component and causing damage.

[0048] According to some embodiments of the present invention, a base frame 130 is also provided below the box body 100, a first shock-absorbing pad 140 is provided between the box body 100 and the base frame 130, and a second shock-absorbing pad 150 is provided below the base frame 130.

[0049] A testing device for abnormal sound testing according to a second aspect embodiment of the present invention includes a swing arm 200; a clamp disposed in the middle of the swing arm 200 for clamping a test piece; a drive assembly 210 disposed on the right side of the swing arm 200 for driving the swing arm 200 to rotate; a first sound receiving assembly 220 disposed in the middle of the swing arm 200 and located on one side of the clamp; a second sound receiving assembly 230 disposed in the front / rear side of the swing arm 200, the first sound receiving assembly 220 and the second sound receiving assembly 230 for receiving the sound emitted by the test piece during the testing process; and a pressing assembly 240 disposed in the middle of the swing arm 200 for restricting the clamp onto the swing arm 200.

[0050] The above-described testing device for abnormal noise testing has at least the following beneficial effects: the fan under test is clamped by a fixture, and the fixture is pressed onto the swing arm 200 by the pressing component 240. The swing arm 200 is driven to rotate by the driving component 210. The first sound receiving component 220 and the second sound receiving component 230 collect the sound generated by the fan under test during the swing, thereby analyzing and judging whether the fan under test has abnormal noise. Compared with relying on human hearing to improve the accuracy of the test, the first sound receiving component 220 and the second sound receiving component 230 provide two different testing methods for the fan under test, one static and one dynamic, making the test results more complete.

[0051] According to some embodiments of this utility model, the drive assembly 210 includes: a first base 211, disposed on the right side of the swing arm 200; a first support 212, disposed above the first base 211; and a motor 213, disposed on the right side of the first support 212. The swing arm 200 is connected to the output end of the motor 213 through a first mounting plate 214. The motor 213 is used to drive the swing arm 200 to rotate. The motor 213 here is the power component in the soundproof box mentioned above. In the actual testing process, different methods can be adopted according to different needs. In the test equipment of the soundproof box, the motor 213 is placed on the outside of the box 100 and connected to the inside of the box 100 through a rotating shaft. In some other embodiments, the motor 213 can also be directly set on one side of the first support 212.

[0052] According to some embodiments of this utility model, the pressing assembly 240 includes: a base plate 241 connected to the lower side of the swing arm 200; a cylinder 242 vertically disposed on the base plate 241; and a pressure plate 243 connected to the output end of the cylinder 242. The cylinder 242 is used to drive the pressure plate 243 to move up / down, so that the pressure plate 243 disengages from / presses the clamp. By driving the pressure plate 243 upward through the cylinder 242, the clamp is released, thereby allowing the clamp on the swing arm 200 to be replaced. It can be adapted to different specifications of products for corresponding clamp replacement, making it more versatile. After the replacement is completed, the cylinder 242 drives the pressure plate 243 to move downward, so that the pressure plate 243 presses the clamp onto the swing arm 200, preventing it from shifting during the swinging process.

[0053] According to an embodiment of the third aspect of the present invention, a fixture for testing abnormal sounds includes a body 300 having a first inner cavity 301, and a positioning recess 302 for placing a test piece on the upper end surface of the body 300; a support block 310 disposed in the first inner cavity 301, the support block 310 having a second inner cavity 311 communicating with the first inner cavity 301; and a rotating member 320 having a central portion disposed in the second inner cavity 311 and hinged to the support block 310, with a pressing end 321 and a pushing end 322 respectively on both sides, the pressing end 321 extending out of the support block 310 and the body 300, the pushing end 322 located in the first inner cavity 301, and the pressing end 321... The push end 322 is used to drive the push end 322 to rotate upward; multiple grippers 330 are provided in the first inner cavity 301 and distributed around the periphery of the positioning recess 302. The middle part of the gripper 330 is hinged to the body 300. The lower end of the gripper 330 is located above the push end 322. The upper end of the gripper 330 extends out of the body 300. The push end 322 pushes the lower end of the gripper 330 upward, so that the upper end of the gripper 330 rotates away from the positioning recess 302; multiple elastic members 340 are respectively provided between the gripper 330 and the body 300 or between the gripper 330 and the support block 310. The elastic members 340 are used to drive the upper end of the gripper 330 to rotate towards the positioning recess 302.

[0054] The above-mentioned fixture for noise testing has at least the following advantages: the part to be tested is positioned by the positioning recess 302, the pressing end 321 of the rotating member 320 is pressed to make it rotate, and the pushing end 322 pushes the lower end of the gripper 330 upward. At the same time, the upper end of the gripper 330 rotates away from the positioning recess 302, so that the gripper 330 is in the open state, which is convenient for placing or picking up the part to be tested in the positioning recess 302. After placement, the pressing end 321 is released, and the upper end of the gripper 330 rotates back to its original position under the action of the elastic member 340 and clamps the part to be tested, keeping it fixed for subsequent testing. The entire clamping structure is simple and easy to operate, which improves the overall testing efficiency.

[0055] According to some embodiments of this utility model, multiple grippers 330 are arranged in a circular array around the central axis of the positioning recess 302. In this embodiment, three grippers 330 are arranged in a circular array around the central axis of the positioning recess 302 to form a three-jaw chuck structure. When the pressing end 321 is pressed down, the pushing end 322 pushes the lower end of the three grippers 330 upward. At the same time, the upper end of the three grippers 330 rotates away from the positioning recess 302. The pressing end 321 is released. Under the action of the elastic element 340 of each gripper 330, the upper end of the gripper 330 resets and clamps the fan to be tested, and the lower end pushes the pushing end 322 down to reset. At the same time, the pressing end 321 rotates upward to reset.

[0056] According to some embodiments of this utility model, the pushing end 322 is provided with an upward spherical surface, the center of which is located on the central axis. The spherical surface is used to push the lower end of the gripper 330 upward. The lower end of the gripper 330 has a protrusion 331 extending laterally. The protrusion 331 is located above the spherical surface. The spherical surface is used to push the protrusion 331 upward. By pushing the protrusion 331 with the spherical surface, the protrusion 331 can move more smoothly along the spherical surface. The spherical surface can act as a guiding surface, reducing friction and avoiding interference.

[0057] According to some embodiments of the present invention, the upper end of the gripper 330 is provided with a gripping block 332, and the upper end of the gripping block 332 is provided with an anti-detachment inclined surface 333 in the direction of the central axis. After the fan under test is gripped by the gripping block 332, the anti-detachment inclined surface 333 can prevent the fan under test from detaching from the gripping block 332 during the swinging process, and can further play the role of clamping and fastening it.

[0058] According to some embodiments of the present invention, when the position of the elastic element 340 is higher than the hinge point of the gripper 330, the pushing end 322 pushes the lower end of the gripper 330 upward, and the upper end of the gripper 330 rotates to the side away from the positioning recess 302, which exerts a squeezing effect on the elastic element 340. At this time, the elastic element 340 is set as a compression spring so that the elastic element 340 generates elastic potential energy. After the pressing end 321 is released, the elastic element 340 can drive the gripper 330 to reset.

[0059] When the position of the elastic element 340 is lower than the hinge point of the gripper 330, the push end 322 pushes the lower end of the gripper 330 upward, and the upper end of the gripper 330 rotates away from the positioning recess 302, which stretches the elastic element 340. At this time, the elastic element 340 is set as a tension spring, so that the elastic element 340 generates elastic potential energy. After the pressing end 321 is released, the elastic element 340 can drive the gripper 330 to reset.

[0060] According to some embodiments of the present invention, the pressing end 321 is provided with a protrusion for pressing, which can be a square structure or a spherical structure.

[0061] According to some embodiments of the present invention, a wiring groove 303 is provided on one side of the positioning recess 302.

[0062] According to some embodiments of the present invention, the body 300 includes an upper panel 304, a fixing block 305 and a lower panel 306 connected sequentially from top to bottom, a support block 310 disposed between the upper panel 304 and the lower panel 306, the first panel, the fixing block 305, the lower panel 306 and the support block 310 together define a first inner cavity 301, and a positioning recess 302 is disposed on the upper end surface of the upper panel 304.

[0063] It should be noted that in this specification, terms such as "one embodiment", "some embodiments", "basic embodiment", and "extended embodiment" may be used to describe several embodiments of the present invention, and the specific features, structures, materials or characteristics of the several embodiments may be combined in accordance with the principles and spirit of the present invention.

[0064] Although some embodiments of the present invention have been shown and described in this specification, the present invention should not be limited to the above embodiments. As long as they achieve the technical effects of the present invention by the same or equivalent means, any changes, modifications, equivalent substitutions and equivalent variations of these embodiments within the spirit and principles of this disclosure, without departing from the principles and purpose of the present invention, should be included within the scope of protection of this disclosure and should be considered to fall within the protection scope of the present invention.

Claims

1. A fixture for dissonance testing, characterized in that, include: The body has a first inner cavity, and the upper end surface of the body has a positioning recess for placing the test piece; A support block is disposed in the first inner cavity, and the support block has a second inner cavity, which is connected to the first inner cavity; A rotating component is located in the second inner cavity and hinged to the support block. It has a pressing end and a pushing end on its two sides. The pressing end extends out of the support block and the body, and the pushing end is located in the first inner cavity. The pressing end is used to drive the pushing end to rotate upward. Multiple grippers are disposed in the first inner cavity and distributed around the periphery of the positioning recess. The middle part of the gripper is hinged to the body. The lower end of the gripper is located above the pushing end. The upper end of the gripper extends out of the body. The pushing end pushes the lower end of the gripper upward, causing the upper end of the gripper to rotate away from the positioning recess. Multiple elastic elements are respectively disposed between the gripper and the body or between the gripper and the support block. The elastic elements are used to drive the upper end of the gripper to rotate toward the positioning recess.

2. The fixture for abnormal sound testing according to claim 1, characterized in that, The multiple grippers are arranged in a circular array around the central axis of the positioning recess.

3. The fixture for sound quality testing according to claim 2, wherein The pushing end has an upward-facing spherical surface, the center of which is located on the central axis. The spherical surface is used to push the lower end of the gripper upward.

4. The fixture for sound test according to claim 3, wherein, The lower end of the gripper has a protrusion extending laterally, the protrusion being located above the spherical surface, and the spherical surface being used to push the protrusion upward.

5. The fixture for sound test according to claim 4, wherein, The upper end of the gripper is provided with a clamping block, and the upper end of the clamping block is provided with an anti-detachment inclined surface in the direction of the central axis.

6. A fixture for abnormal sound testing according to any one of claims 1 to 5, characterized in that, The elastic element is positioned above the hinge point of the gripper, and the elastic element is configured as a compression spring.

7. A fixture for abnormal sound testing according to any one of claims 1 to 5, characterized in that, The elastic element is positioned below the hinge point of the gripper, and the elastic element is configured as a tension spring.

8. A fixture for abnormal sound testing according to claim 6, characterized in that, The pressing end has an upward-facing protrusion for pressing.

9. The fixture for sound quality testing of claim 1, wherein, A cable routing groove is provided on one side of the positioning recess.

10. The fixture for sound quality testing of claim 1, wherein, The body includes an upper panel, a fixing block, and a lower panel connected sequentially from top to bottom. The support block is disposed between the upper panel and the lower panel. The first panel, the fixing block, the lower panel, and the support block together define the first inner cavity. The positioning recess is disposed on the upper end surface of the upper panel.

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