A speaker rear cavity verification test fixture

Abstract

This utility model discloses a loudspeaker rear cavity verification test fixture, including a base, a sleeve, an adjusting member, a pin, and a sealing gasket. The base has a sound-emitting window with a mounting groove for mounting the loudspeaker under test. The sleeve is mounted on the base, and the mounting groove corresponds to the hollow area of ​​the sleeve. The sleeve has a pin hole arranged radially therein. The adjusting member is movably disposed within the sleeve along its axial direction, and has multiple adjusting holes arranged axially. The pin passes through the pin hole and one adjusting hole. The sealing gasket is located at the end of the adjusting member near the base and makes sealing contact with the inner circumferential wall of the sleeve. This loudspeaker rear cavity verification test fixture can quickly verify the impact of different volumes on the low-frequency performance of loudspeaker products.

Description

Technical Field

[0001] This utility model relates to the field of testing fixtures for electroacoustic converters, and in particular to a speaker rear cavity verification test fixture. Background Technology

[0002] With the increasing demand for smart wearable devices, major speaker manufacturers have also increased their R&D investment in their products. The rear cavity volume of a speaker plays a crucial role in the low-frequency response of the product. Therefore, during the R&D process, the low-frequency performance is improved by adjusting the rear cavity volume. The conventional rear cavity verification stage involves making rear cavity covers of different sizes and volumes for verification, which is time-consuming and labor-intensive. Therefore, it is necessary to design an adjustable rear cavity fixture to quickly verify the impact of different volumes on the low-frequency performance of the product and accelerate the R&D verification process. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a loudspeaker rear cavity verification test fixture, which can quickly verify the impact of different volumes on the low-frequency performance of loudspeaker products.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a loudspeaker rear cavity verification test fixture, comprising: The base has a sound-emitting window, and the sound-emitting window has a mounting slot for mounting the speaker to be tested. A sleeve is provided on a base, and a mounting groove is provided corresponding to the hollow area of ​​the sleeve. The sleeve has a pin hole provided radially thereon. An adjusting component is movably disposed inside the sleeve along the axial direction, and the adjusting component has multiple adjusting holes arranged along the axial direction. A pin, which has a pin hole and an adjustment hole; A sealing gasket is located at the end of the adjusting component near the base and makes sealing contact with the inner circumferential wall of the sleeve.

[0005] Furthermore, the adjusting member has an operating part at the end away from the base, and the operating part is at least partially exposed outside the sleeve.

[0006] Furthermore, the cross-section of the adjusting member is T-shaped or I-shaped.

[0007] Furthermore, the sealing gasket is provided with a first vent hole, and the adjusting member is provided with a second vent hole, the first vent hole and the second vent hole are connected to form a vent hole.

[0008] Furthermore, the sleeve has two ears disposed opposite each other at the end away from the base, and the pin hole is provided on the ears.

[0009] Furthermore, the base has a positioning groove on one side of the mounting groove for inserting the end of the sleeve.

[0010] Furthermore, the positioning groove includes an annular groove and an extension groove extending outward from the annular groove, and the end of the sleeve is provided with a positioning block that cooperates with the extension groove.

[0011] Furthermore, there are multiple positioning blocks, which are evenly distributed along the circumference of the sleeve.

[0012] Furthermore, a sealing buffer pad is provided at the mounting groove.

[0013] Furthermore, a positioning frame is provided at the sound-emitting window, the mounting slot is provided on the positioning frame, and the positioning frame is detachably connected to the base.

[0014] The beneficial effects of this utility model are as follows: This loudspeaker rear cavity verification test fixture has a simple and novel structure. By using the cooperation of sleeve, adjusting component, and pin, the discrete volume verification that originally required multiple cover plates of different thicknesses is transformed into volume adjustment within a single cavity. The sleeve is fixed to the base and together with the loudspeaker under test, the base, and the sealing gasket, forms the rear cavity. The adjusting component can change the cavity depth by moving axially within the sleeve, thereby changing the volume of the rear cavity. The pin passes through the radial pin hole of the sleeve and locks with the corresponding adjusting hole on the adjusting component to fix the required volume. The operation is simple. The sealing gasket is always compressed between the end face of the adjusting component and the inner wall of the sleeve, forming a continuous circumferential seal, ensuring that the sound leakage is constant during the change of cavity volume, and eliminating the interference of sealing state differences on low-frequency testing. Therefore, a single fixture can quickly switch between multiple rear cavity volumes while maintaining complete consistency in assembly standards and sealing conditions. This allows for direct comparison of the low-frequency response curves of the same speaker under test in different volumes, eliminating the need for repeated design, processing, and assembly of cover plates. This significantly shortens the verification cycle and reduces prototyping costs. Furthermore, because the test variable is unique, R&D personnel can accurately attribute performance differences, improve data confidence, and thus accelerate the locking and optimization of product low-frequency parameters. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the speaker rear cavity verification test fixture in Example 1; Figure 2 A cross-sectional view of the speaker rear cavity verification test fixture of Example 1. Figure 1 ; Figure 3 A cross-sectional view of the speaker rear cavity verification test fixture of Example 1. Figure 2 ; Figure 4 This is a schematic diagram of the base in the speaker rear cavity verification test fixture of Embodiment 1; Figure 5 This is a schematic diagram of the sleeve in the speaker rear cavity verification test fixture of Example 1.

[0016] Label Explanation: 1. Base; 11. Sound-emitting window; 12. Positioning slot; 13. Extension slot; 2. Sleeve; 21. Ear; 211. Pin hole; 22. Positioning block; 3. Adjusting component; 31. Adjusting hole; 32. Operating part; 4. Bolt; 5. Sealing gasket; 6. Positioning frame; 61. Mounting slot; 62. Sealing buffer pad; 7. Vent hole; 71. First vent hole; 72. Second vent hole; 10. Rear cavity; 20. Speaker to be tested. Detailed Implementation

[0017] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0018] Please refer to Figures 1 to 5 A speaker rear cavity verification test fixture, comprising: The base 1 has a sound-emitting window 11 and a mounting slot 61 for mounting the speaker 20 to be tested at the sound-emitting window 11. Sleeve 2 is mounted on base 1, and mounting groove 61 is provided corresponding to the hollow area of ​​sleeve 2. Sleeve 2 has pin hole 211 arranged radially thereon. Adjusting component 3 is movably disposed inside sleeve 2 along the axial direction of sleeve 2, and multiple adjusting holes 31 are arranged along the axial direction of adjusting component 3; Pin 4, pin 4 has a pin hole 211 and an adjustment hole 31; The sealing gasket 5 is located at one end of the adjusting member 3 near the base 1 and is in sealing contact with the inner circumferential wall of the sleeve 2.

[0019] As can be seen from the above description, the beneficial effects of this utility model are as follows: This loudspeaker rear cavity verification test fixture has a simple and novel structure. By using the cooperation of sleeve 2, adjusting component 3, and pin 4, the discrete volume verification that originally required multiple cover plates of different thicknesses is transformed into volume adjustment within a single cavity. Sleeve 2 is fixed to base 1 and together with the loudspeaker under test 20, base 1, and sealing gasket 5, it forms the rear cavity 10. The adjusting component 3 can change the cavity depth by axially moving within sleeve 2, thereby changing the volume of the rear cavity 10. Pin 4 passes through the radial pin hole 211 of sleeve 2 and is locked with the corresponding adjusting hole 31 on adjusting component 3 to achieve the fixation of the required volume. The operation is simple. The sealing gasket 5 is always compressed between the end face of adjusting component 3 and the inner wall of sleeve 2, forming a continuous circumferential seal, ensuring that the sound leakage is constant during the change of cavity volume, and eliminating the interference of sealing state differences on low-frequency testing. Therefore, a single fixture can quickly switch between multiple rear cavity volumes while maintaining complete consistency in assembly standards and sealing conditions, directly comparing the low-frequency response curves of the same speaker 20 under test in different volumes. This eliminates the need for repeated design, processing, and assembly of cover plates, significantly shortening the verification cycle and reducing prototyping costs. At the same time, because the test variable is unique, R&D personnel can accurately attribute performance differences, improve data confidence, and thus accelerate the locking and optimization of product low-frequency parameters.

[0020] Furthermore, the adjusting member 3 has an operating part 32 at one end away from the base 1, and the operating part 32 is at least partially exposed outside the sleeve 2.

[0021] As can be seen from the above description, the exposed operating part 32 allows testers to push and pull the adjustment part 3 by hand without the need for tools, making operation convenient, shortening the experimental preparation time, and reducing the fixture's dependence on the operating space.

[0022] Furthermore, the cross-section of the adjusting member 3 is T-shaped or I-shaped.

[0023] As can be seen from the above description, the adjustment component 3 with a T-shaped or I-shaped cross-section has a simple structure and is easy to process and manufacture.

[0024] Furthermore, the sealing gasket 5 is provided with a first vent hole 71, and the adjusting member 3 is provided with a second vent hole 72. The first vent hole 71 and the second vent hole 72 are connected to form a vent hole 7.

[0025] As can be seen from the above description, the vent 7, which is composed of the first vent 71 and the second vent 72, can balance the air pressure between the rear cavity 10 and the outside air pressure, thereby improving the purity and reliability of the verification results.

[0026] Furthermore, the sleeve 2 has two ears 21 oppositely arranged at the end away from the base 1, and the pin hole 211 is provided on the ears 21.

[0027] As can be seen from the above description, the pin hole 211 is set on the ear 21, and the wall thickness of the sleeve 2 does not need to be reduced. This not only maintains sufficient rigidity to prevent deformation under pressure, but also provides a through channel for the pin 4, taking into account both strength and function, and extending the service life of the fixture under high-frequency insertion and removal.

[0028] Furthermore, the base 1 has a positioning groove 12 on one side of the mounting groove 61 for inserting the end of the sleeve 2.

[0029] As described above, the positioning groove 12 forms a recessed socket interface on the base 1. The sleeve 2 can be inserted to achieve initial positioning. No additional fixtures are needed for alignment during assembly, reducing human alignment errors and ensuring the coaxiality of the speaker, sleeve 2, and adjusting component 3, thereby ensuring uniform circumferential compression of the sealing gasket 5.

[0030] Furthermore, the positioning groove 12 includes an annular groove and an extension groove 13 extending outward from the annular groove, and the end of the sleeve 2 is provided with a positioning block 22 that cooperates with the extension groove 13.

[0031] As can be seen from the above description, the extension groove 13 and the positioning block 22 cooperate to form an anti-rotation positioning pair, preventing the sleeve 2 from rotating circumferentially due to vibration or impact force from the pin 4 during the experiment.

[0032] Furthermore, there are multiple positioning blocks 22, which are evenly distributed along the circumference of the sleeve 2.

[0033] As described above, the multiple circumferentially distributed positioning blocks 22 distribute the weight of the sleeve 2 and the shear force of the pin 4 to each extension groove 13, reducing stress concentration at a single point, preventing the sleeve 2 from undergoing elliptical deformation due to long-term stress, ensuring a constant sealing gap, and extending the life of the fixture.

[0034] Furthermore, a sealing buffer pad 62 is provided at the mounting groove 61.

[0035] As described above, the sealing buffer pad 62 forms a flexible transition between the speaker under test 20 and the base 1, absorbing the vibration of the speaker under test 20 and compensating for flatness error, avoiding hard contact that could scratch the speaker under test 20, improving experimental safety, and preventing air leakage from the front of the speaker under test 20, thereby ensuring the accuracy of the experimental results.

[0036] Furthermore, a positioning frame 6 is provided at the sound-emitting window 11, and the mounting groove 61 is provided on the positioning frame 6. The positioning frame 6 is detachably connected to the base 1.

[0037] As described above, the positioning frame 6 and the base 1 are detachably connected, allowing the same base 1 to be quickly replaced with positioning frames 6 of different specifications, adapting to various sizes of speakers 20 to be tested, achieving multiple uses with one fixture, reducing the number of special fixtures, and lowering the overall cost of R&D prototyping.

[0038] Please refer to Figures 1 to 5 The first embodiment of this utility model is: a loudspeaker rear cavity verification test fixture, used to verify the impact of different volumes on the low-frequency performance of the loudspeaker 20 under test, so as to shorten the verification cycle, reduce the prototyping cost, and accelerate the locking and optimization of the low-frequency parameters of the loudspeaker product.

[0039] The loudspeaker rear cavity verification test fixture includes a base 1, a sleeve 2, an adjusting member 3, a pin 4, and a sealing gasket 5. The base 1 is provided with a sound-emitting window 11, and the sound-emitting window 11 is provided with a mounting groove 61 for mounting the loudspeaker 20 to be tested. The sleeve 2 is provided on the base 1, and the mounting groove 61 is provided corresponding to the hollow area of ​​the sleeve 2. The sleeve 2 has a pin hole 211 arranged radially therein. The adjusting member 3 is movably provided in the sleeve 2 along the axial direction. The adjusting member 3 has multiple adjusting holes 31 arranged axially. The pin 4 passes through the pin hole 211 and an adjusting hole 31. The sealing gasket 5 is provided at the end of the adjusting member 3 near the base 1 and is in sealing contact with the inner peripheral wall of the sleeve 2.

[0040] The sealing gasket 5, sleeve 2, base 1, and the speaker 20 to be tested installed in the mounting groove 61 together form the rear cavity 10. When the pin 4 is engaged with different adjustment holes 31, the depth of the adjustment member 3 inserted into the sleeve 2 changes, thereby changing the volume of the rear cavity 10.

[0041] To facilitate operation by testers, the end of the adjusting member 3 away from the base 1 is provided with an operating part 32, and the operating part 32 is at least partially exposed outside the sleeve 2.

[0042] In one or more embodiments, the cross-section of the adjusting member 3 is T-shaped or I-shaped. In this embodiment, the cross-section of the adjusting member 3 is I-shaped.

[0043] To balance the air pressure between the rear cavity 10 and the outside atmosphere, the sealing gasket 5 is provided with a first vent hole 71, and the adjusting member 3 is provided with a second vent hole 72. The first vent hole 71 and the second vent hole 72 are connected to form a vent hole 7.

[0044] Optionally, the sleeve 2 has two ears 21 oppositely arranged at the end away from the base 1, and the pin hole 211 is provided on the ears 21.

[0045] In some embodiments, the base 1 has a positioning groove 12 on one side of the mounting groove 61 for inserting the end of the sleeve 2. In this embodiment, the positioning groove 12 includes an annular groove and an extension groove 13 extending outward from the annular groove, and the end of the sleeve 2 is provided with a positioning block 22 that cooperates with the extension groove 13. Preferably, there are multiple positioning blocks 22, which are evenly distributed along the circumference of the sleeve 2; in this embodiment, there are two positioning blocks 22, which are symmetrically arranged.

[0046] To ensure the accuracy of the test results, it is preferable that a sealing buffer pad 62 is provided at the mounting groove 61.

[0047] To improve the versatility of the base 1, a positioning frame 6 is provided at the sound-emitting window 11, and the mounting groove 61 is provided on the positioning frame 6. The positioning frame 6 is detachably connected to the base 1. It is easy to understand that when the speaker rear cavity verification test fixture has the positioning frame 6, the sealing buffer pad 62 is provided on the positioning frame 6.

[0048] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A loudspeaker rear cavity verification test fixture, characterized in that, include The base has a sound-emitting window, and the sound-emitting window has a mounting slot for mounting the speaker to be tested. A sleeve is provided on a base, and a mounting groove is provided corresponding to the hollow area of ​​the sleeve. The sleeve has a pin hole provided radially thereon. An adjusting component is movably disposed inside the sleeve along the axial direction, and the adjusting component has multiple adjusting holes arranged along the axial direction. A pin, which has a pin hole and an adjustment hole; A sealing gasket is located at the end of the adjusting component near the base and makes sealing contact with the inner circumferential wall of the sleeve.

2. The loudspeaker rear cavity verification test fixture according to claim 1, characterized in that, The adjusting member has an operating part at one end away from the base, and the operating part is at least partially exposed outside the sleeve.

3. The loudspeaker rear cavity verification test fixture according to claim 2, characterized in that, The cross-section of the adjusting component is T-shaped or I-shaped.

4. The loudspeaker rear cavity verification test fixture according to claim 1, characterized in that, The sealing gasket is provided with a first vent hole, and the adjusting member is provided with a second vent hole. The first vent hole and the second vent hole are connected to form a vent hole.

5. The loudspeaker rear cavity verification test fixture according to claim 1, characterized in that, The sleeve has two ears that are positioned opposite each other at the end away from the base, and the pin hole is located on the ears.

6. The loudspeaker rear cavity verification test fixture according to claim 1, characterized in that, The base has a positioning groove on one side of the mounting groove for inserting the end of the sleeve.

7. The loudspeaker rear cavity verification test fixture according to claim 6, characterized in that, The positioning groove includes an annular groove and an extension groove extending outward from the annular groove, and the end of the sleeve is provided with a positioning block that cooperates with the extension groove.

8. The loudspeaker rear cavity verification test fixture according to claim 7, characterized in that, The number of positioning blocks is multiple, and the multiple positioning blocks are evenly distributed along the circumference of the sleeve.

9. The loudspeaker rear cavity verification test fixture according to claim 1, characterized in that, A sealing buffer pad is provided at the mounting slot.

10. The loudspeaker rear cavity verification test fixture according to claim 1, characterized in that, The sound-emitting window is provided with a positioning frame, the mounting slot is provided on the positioning frame, and the positioning frame is detachably connected to the base.

Images