A board microphone test fixture

Abstract

The utility model discloses a kind of on-board microphone test tool, including bottom plate, multiple support columns and multiple sealing contact pieces, support column is placed on the bottom plate, the top of support column is equipped with loudspeaker;The sealing contact piece is set around the vibration sound area of the loudspeaker, at least one of the support column and the loudspeaker is sealed with the sealing contact piece connection.This on-board microphone test tool is placed with multiple support columns on the bottom plate, each support column is equipped with loudspeaker as sound source, the loudspeaker on support column and MEMS microphone on the PCBA plate to be measured one-to-one, not only directivity is good, positioning accuracy is high, can make the measurement of MEMS microphone more accurate, and still can let multiple MEMS microphone on PCBA plate can be tested in the same time period all at once, greatly improve the test efficiency of MEMS microphone on PCBA plate, facilitate to reduce test cost.

Description

Technical Field

[0001] This utility model relates to the technical field of electroacoustic device testing equipment, and in particular to a test fixture for on-board microphones. Background Technology

[0002] With the increasing popularity of smart wearable products, smart home appliances, and other smart devices, the market demand for MEMS microphones is constantly growing. At the same time, more and more smart devices require multiple MEMS microphones for collaborative sound pickup. Therefore, how to quickly inspect multiple MEMS microphones on PCBA boards during the production process to improve production efficiency is a pressing issue that the industry urgently needs to address.

[0003] Currently, when performing performance testing on multiple MEMS microphones on a PCBA board, they are generally tested one by one. This testing method takes a long time and is inefficient. In addition, the one-by-one testing method requires each microphone to be located individually, which has low positioning accuracy and leads to low test accuracy due to directional deviation. Utility Model Content

[0004] The technical problem to be solved by this utility model is: how to provide a test fixture for on-board microphones with high testing efficiency and high positioning accuracy.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a microphone testing fixture on a board, including a base plate, multiple support columns and multiple sealing contacts, the support columns are placed on the base plate, and a loudspeaker is installed on the top of the support columns; the sealing contacts are arranged around the vibration sound-generating area of ​​the loudspeaker, and at least one of the support columns and the loudspeaker is sealed to the sealing contacts.

[0006] Furthermore, the support column is detachably connected to the base plate.

[0007] Furthermore, the support column is equipped with a magnet, and the base plate is made of ferromagnetic material, with the magnet magnetically attracted to the base plate.

[0008] Furthermore, the bottom surface of the support column is provided with a receiving groove, and the magnet is installed in the receiving groove.

[0009] Furthermore, the base plate is provided with multiple sliding grooves, and the support column is slidably disposed in the sliding grooves.

[0010] Furthermore, the base plate is provided with multiple snap-fit ​​positions, and the support column is snapped into the snap-fit ​​positions.

[0011] Furthermore, the top surface of the sealing contact is higher than the top surface of the speaker, and the speaker and the sealing contact form a sound-emitting front cavity.

[0012] Furthermore, the support column is provided with a wiring channel, which connects to the peripheral wall of the support column.

[0013] Furthermore, the wiring channel connects to the bottom surface of the support column, and the wiring channel forms a notch structure on the peripheral wall of the support column.

[0014] Furthermore, the sealing contact element is provided in a one-to-one correspondence with the support column.

[0015] The beneficial effects of this utility model are as follows: The base plate of the microphone testing fixture on this board has multiple support columns, and each support column is equipped with a speaker as a sound source. The speaker on the support column corresponds one-to-one with the MEMS microphone on the PCBA board under test. This not only provides good directivity and high positioning accuracy, making the measurement of MEMS microphones more accurate, but also allows multiple MEMS microphones on the PCBA board to be tested at the same time, greatly improving the testing efficiency of MEMS microphones on the PCBA board and helping to reduce testing costs. Attached Figure Description

[0016] Figure 1 A schematic diagram of the microphone testing fixture on the board;

[0017] Figure 2 This is a schematic diagram showing the mating of the microphone testing fixture on the board with the PCBA board.

[0018] Figure 3 A partial cross-sectional view of the area where the microphone test fixture on the board mates with the PCBA board;

[0019] Figure 4 A schematic diagram of the structure of the microphone testing fixture on the board after the base plate is hidden;

[0020] Figure 5 This is a structural diagram of the microphone testing fixture on the board, viewed from another angle after the base plate is hidden.

[0021] Label Explanation:

[0022] 1. Base plate;

[0023] 2. Support column; 21. Mounting groove; 22. Cable routing channel; 23. Notch structure; 24. Receiving groove;

[0024] 3. Sealed contact parts;

[0025] 4. Speaker;

[0026] 5. Magnets;

[0027] 6. PCBA board; 61. Acoustic port;

[0028] 7. MEMS microphone. Detailed Implementation

[0029] 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.

[0030] Please refer to Figures 1 to 5 A test fixture for a microphone on a board includes a base plate 1, multiple support columns 2 and multiple sealing contacts 3. The support columns 2 are placed on the base plate 1, and a speaker 4 is mounted on the top of the support column 2. The sealing contacts 3 are arranged around the vibration sound-generating area of ​​the speaker 4, and at least one of the support column 2 and the speaker 4 is sealed to the sealing contacts 3.

[0031] As can be seen from the above description, the beneficial effects of this utility model are as follows: The base plate 1 of the microphone testing fixture on this board has multiple support columns 2, and each support column 2 is equipped with a speaker 4 as a sound source. The speaker 4 on the support column 2 corresponds one-to-one with the MEMS microphone 7 on the PCBA board 6 under test. This not only provides good directivity and high positioning accuracy, making the measurement of the MEMS microphone 7 more accurate, but also allows multiple MEMS microphones 7 on the PCBA board 6 to be tested at the same time, greatly improving the testing efficiency of the MEMS microphones 7 on the PCBA board 6 and helping to reduce testing costs.

[0032] Furthermore, the support column 2 is detachably connected to the base plate 1.

[0033] As can be seen from the above description, the detachable connection between the support column 2 and the base plate 1 facilitates the disassembly and assembly of the support column 2, thereby making it easier to maintain the speaker 4 on the support column 2 in the future.

[0034] Furthermore, the support column 2 is provided with a magnet 5, and the base plate 1 is made of ferromagnetic material. The magnet 5 and the base plate 1 are magnetically attracted to each other.

[0035] As described above, the support column 2 is magnetically attached to the base plate 1 via the magnet 5, allowing the position of the support column 2 on the base plate 1 to be adjusted arbitrarily. Furthermore, the number of support columns 2 can be increased or decreased as needed. This enables the on-board microphone testing fixture to effectively adapt to different PCBA boards 6 equipped with MEMS microphones 7, effectively improving the versatility and flexibility of the on-board microphone testing fixture, and facilitating subsequent maintenance and replacement of the support column 2 and its mounted speaker 4. Moreover, it makes testing MEMS microphones 7 on small-sized PCBA boards 6 more convenient.

[0036] Furthermore, the bottom surface of the support column 2 is provided with a receiving groove 24, and the magnet 5 is installed in the receiving groove 24.

[0037] As can be seen from the above description, the presence of the receiving slot 24 facilitates the positioning and installation of the magnet 5.

[0038] Furthermore, the base plate 1 is provided with multiple sliding grooves, and the support column 2 is slidably disposed in the sliding grooves.

[0039] As described above, the support column 2 can slide on the base plate 1, and the position of the support column 2 on the base plate 1 is adjustable, which allows the microphone testing fixture on the board to be adapted to multiple different PCBA boards 6 equipped with MEMS microphones 7, thus giving the microphone testing fixture on the board good versatility.

[0040] Furthermore, the base plate 1 is provided with multiple snap-fit ​​positions, and the support column 2 is snapped into the snap-fit ​​positions.

[0041] As described above, the position of the support column 2 on the base plate 1 is adjustable. When the support column 2 is engaged with different buckle positions on the base plate 1, the microphone testing fixture on the board is adaptable to different PCBA boards 6 equipped with MEMS microphones 7, so that the microphone testing fixture on the board has good versatility.

[0042] Furthermore, the top surface of the sealing contact 3 is positioned higher than the top surface of the speaker 4, and the speaker 4 and the sealing contact 3 form a sound-emitting front cavity.

[0043] As described above, during testing, the top of the sealing contact 3 is in close contact with the PCBA board 6, thereby sealing the sound-emitting cavity and completely sealing the hollow area of ​​the sealing contact 3. This results in less sound wave leakage from the speaker 4, which helps improve the accuracy of the test results.

[0044] Furthermore, the support column 2 is provided with a wiring channel 22, which connects to the peripheral wall of the support column 2.

[0045] As described above, the power supply line for the external power supply to the speaker 4 is connected to the outer wall of the support column 2, so that the power supply line will not affect the connection between the support column 2 and the base plate 1.

[0046] Furthermore, the wiring channel 22 connects to the bottom surface of the support column 2, and the wiring channel 22 forms a notch structure 23 on the peripheral wall of the support column 2.

[0047] As can be seen from the above description, the presence of the notch structure 23 facilitates the processing and forming of the support column 2 and helps to reduce the processing accuracy requirements at the connection between the wiring channel 22 and the outer wall of the support column 2.

[0048] Furthermore, the sealing contact 3 is provided in a one-to-one correspondence with the support column 2.

[0049] As can be seen from the above description, the vibration and sound-generating area of ​​the speaker 4 on each support column 2 can be well sealed, which helps to ensure the accuracy of the test results.

[0050] Please refer to Figures 1 to 5 The first embodiment of this utility model is: a microphone testing fixture on the board, used to perform unified testing on multiple MEMS microphones 7 mounted on the PCBA board 6.

[0051] The on-board microphone testing fixture includes a base plate 1, multiple support columns 2, and multiple sealing contacts 3. The support columns 2 are placed on the base plate 1, and a speaker 4 is mounted on the top of the support column 2. The sealing contacts 3 are arranged around the vibration sound-generating area of ​​the speaker 4. At least one of the support column 2 and the speaker 4 is sealed to the sealing contact 3. The sealing contacts 3 are arranged in a one-to-one correspondence with the support column 2.

[0052] The top surface of the sealing contact 3 is higher than the top surface of the speaker 4, and the speaker 4 and the sealing contact 3 form a sound-emitting cavity. When testing with an on-board microphone test fixture, the PCBA board 6 with multiple MEMS microphones 7 mounted on it abuts against the sealing contact 3, making the sound-emitting cavity completely closed. The sound waves emitted by the speaker 4 are picked up by the MEMS microphones 7 through the sound holes 61 provided on the PCBA board 6 corresponding to the MEMS microphones 7.

[0053] The sealing contact 3 is a sealing foam, rubber ring, or other structural component with elastic sealing function.

[0054] In some embodiments, the support column 2 is fixedly connected to the base plate 1, thereby forming an integral structure for the microphone testing fixture on the plate, which is convenient for transfer and storage and can prevent the support column 2 from collapsing; while in some embodiments, the support column 2 and the base plate 1 are detachably connected for easy maintenance.

[0055] To improve the versatility of the microphone testing fixture on the board, in this embodiment, the support column 2 is provided with a magnet 5, and the base plate 1 is made of ferromagnetic material. The magnet 5 and the base plate 1 are magnetically attracted to each other. The base plate 1 can be made of iron plate or the like. Optionally, the bottom surface of the support column 2 is provided with a receiving groove 24, and the magnet 5 is installed in the receiving groove 24. In other embodiments, the base plate 1 is provided with multiple sliding grooves, and the support column 2 can be slidably disposed in the sliding grooves or its position on the base plate 1 can be adjusted, thereby improving the versatility of the microphone testing fixture; or, multiple snap-fit ​​positions are provided on the base plate 1, and the support column 2 can be selectively snapped into different snap-fit ​​positions, which also allows adjustment of the support column 2's position on the base plate 1, thereby improving the versatility of the microphone testing fixture.

[0056] In some embodiments, the top surface of the support column 2 is provided with a mounting groove 21 for mounting the speaker 4. In this embodiment, the periphery of the top surface of the speaker 4 is flush with the top surface of the support column 2. In other embodiments, it is also feasible for the periphery of the top surface of the speaker 4 to be slightly higher or slightly lower than the top surface of the support column 2.

[0057] The support column 2 is provided with a wiring channel 22, which connects the peripheral wall of the support column 2 and the mounting groove 21. Preferably, the wiring channel 22 connects to the bottom surface of the support column 2, and the wiring channel 22 forms a notch structure 23 in the peripheral wall of the support column 2. The presence of the notch structure 23 facilitates the routing of external power supply wires. Specifically, since the entrance and exit of the wiring channel 22 are not on the same straight line, when the wiring channel 22 does not connect to the bottom surface of the support column 2, the power supply wire needs to pass through the outer wall of the support column 2 and then exit from the top of the support column 2 to connect to the speaker 4. When the support column 2 has the notch structure 23, the power supply wire can pass through the bottom of the support column 2 and exit from the top of the support column 2. In use, the power supply wire can be moved into the notch structure 23. The power supply wire will still not affect the connection between the support column 2 and the base plate 1. At the same time, the wiring channel 22 connects to the bottom surface of the support column 2, which makes it convenient for assembly personnel to approach the power supply wire and speaker 4 from the bottom of the support column 2. When there are a large number of support columns 2, in order to avoid interference with the wiring, the notch structure 23 can be set to make the wiring direction more flexible, avoid the support columns 2 from bearing unnecessary torque during wiring, and increase the stability of the support columns 2.

[0058] 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 board-mounted microphone testing fixture, characterized in that, include Base plate; Multiple support columns are placed on the base plate, and a speaker is installed on the top of the support columns; A plurality of sealing contacts are arranged around the vibrating sound-producing area of ​​the loudspeaker, and at least one of the support column and the loudspeaker is sealed to the sealing contacts.

2. The on-board microphone testing fixture according to claim 1, characterized in that, The support column is detachably connected to the base plate.

3. The on-board microphone testing fixture according to claim 2, characterized in that, The support column is equipped with a magnet, and the base plate is made of ferromagnetic material. The magnet and the base plate are magnetically attracted to each other.

4. The on-board microphone testing fixture according to claim 3, characterized in that, The bottom surface of the support column is provided with a receiving groove, and the magnet is installed in the receiving groove.

5. The on-board microphone testing fixture according to claim 2, characterized in that, The base plate is provided with multiple sliding grooves, and the support column is slidably disposed in the sliding grooves.

6. The on-board microphone testing fixture according to claim 2, characterized in that, The base plate is provided with multiple snap-fit ​​positions, and the support column is snapped into the snap-fit ​​positions.

7. The on-board microphone testing fixture according to claim 1, characterized in that, The top surface of the sealing contact is higher than the top surface of the speaker, and the speaker and the sealing contact form a sound-emitting cavity.

8. The on-board microphone testing fixture according to claim 1, characterized in that, The support column is provided with a wiring channel, which connects to the perimeter wall of the support column.

9. The on-board microphone testing fixture according to claim 8, characterized in that, The wiring channel connects to the bottom surface of the support column, and the wiring channel forms a notch structure on the peripheral wall of the support column.

10. The on-board microphone testing fixture according to claim 1, characterized in that, The sealing contact element is provided in a one-to-one correspondence with the support column.

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