Hearing aid double-MIC fixing structure

Abstract

The utility model discloses a hearing aid double-MIC fixing structure, which relates to the technical field of hearing aids and comprises an upper shell, at least two pickup holes facing different directions are formed in the upper shell, and support grooves are formed in the positions, corresponding to the pickup holes, of the inner wall of the upper shell; the PCB is installed and fixed in the upper shell; the MIC assembly is accommodated in the bracket groove; the connecting assembly comprises a connecting mainboard and at least two connecting support plates, the hearing aid can pick up sound from multiple directions due to different orientation designs of the pickup holes, so that sound information in the environment can be more comprehensively captured, the sound collection range and accuracy are improved, the PCB is positioned through screw-thread fit of a screw and an internal thread cylinder, and the sound collection efficiency is improved. In the process, the PCB applies thrust to the connecting mainboard, the notch extrudes the connecting support plate to expand outwards, the pressing column can slightly move forwards towards the pickup hole, and the MIC body can press the sealing ring and the dustproof plate, so that the MIC assembly is stable in the hearing aid.

Description

Technical Field

[0001] This utility model relates to the field of hearing aid technology, and in particular to a dual-MIC fixing structure for hearing aids. Background Technology

[0002] Traditional single-microphone hearing aids can only pick up sound from one direction, and cannot effectively distinguish and process sounds from different directions. In noisy environments, users may find the sound blurry and have difficulty distinguishing important speech information. Dual-microphone hearing aids, on the other hand, can significantly improve the clarity and intelligibility of sound through technologies such as directional enhancement and noise suppression. In complex environments, users can hear the target sound more easily while reducing the interference of background noise.

[0003] Chinese Patent Publication No. CN220421976U discloses a dual-MIC sealed and fixed structure for headphones, including a housing, a sealing bracket, and an FPC board. The housing is provided with at least two pickup holes, and the inner wall of the housing is provided with a bracket groove corresponding to each pickup hole. The sealing bracket is provided with each bracket groove and is fixedly connected to the bracket groove. The FPC board is installed in the housing, and a MIC is provided on it corresponding to each pickup hole. This utility model achieves a sealed fit between the MIC bracket and the top cover assembly. The positioning post of the sealing bracket can ensure that the MIC is always in a defined area. After each FPC is fitted, the position is consistent, the sound reception is more stable, and the noise reduction effect is better. After the MIC bracket and the top cover are assembled, an angle is formed between the MICs. This angle reduces the frontal impact of the wind on the MIC when it blows towards the MIC sound receiving channel during movement, thus reducing the generation of wind noise.

[0004] The above technology reinforces the sealing surface between the FPC board and the sealing bracket with adhesive. However, this adhesive is prone to delamination during prolonged use of the equipment or when subjected to external vibration or impact, causing the MIC positioning to fail. Utility Model Content

[0005] The purpose of this invention is to provide a dual-MIC fixing structure for hearing aids to solve the technical problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following solution to the aforementioned technical problems:

[0007] A dual-MIC fixing structure for a hearing aid includes:

[0008] The upper shell has at least two pickup holes facing different directions, and the inner wall of the upper shell has a support groove corresponding to each pickup hole.

[0009] The PCB board is mounted and fixed inside the upper shell.

[0010] The MIC assembly is housed within the bracket slot; and

[0011] A connecting assembly includes a connecting motherboard and at least two connecting support plates, one side of the connecting motherboard being attached to a PCB board, and the other side of the connecting motherboard being used to press the connecting support plates against the MIC assembly.

[0012] As a further embodiment of this utility model, slots are provided at the two corners of the connecting motherboard away from the PCB board, and the walls of the slots are perpendicular to and intersect with the extension line of the pickup hole.

[0013] As a further embodiment of this utility model, the MIC assembly includes a MIC body, a sealing ring, and a dustproof plate. The MIC body, the sealing ring, and the dustproof plate are arranged sequentially from the opening end of the bracket groove toward the pickup hole. The dustproof plate is densely covered with small holes in the area exposed between the pickup hole and the inner diameter of the sealing ring.

[0014] As a further embodiment of this utility model, one side of the connecting support plate is provided with an anti-movement groove with the same thickness as the connecting main plate, and the other side of the connecting support plate is fixed with a pressure column adapted to the bracket groove, and the pressure column is in contact with the adjacent MIC body.

[0015] As a further embodiment of this utility model, a side slot is provided on one side of the bracket groove, and a signal transmission line for realizing the electrical connection between the MIC body and the PCB board is provided in the side slot, and the MIC body is arranged facing the pickup hole.

[0016] As a further embodiment of this utility model, two positioning holes are provided on the PCB board, and a positioning post corresponding to the positioning hole is provided on the side of the connecting motherboard facing the PCB board.

[0017] As a further embodiment of this utility model, mounting holes are provided at all four corners of the PCB board, and an internally threaded cylinder is provided on the inner wall of the upper shell corresponding to the mounting holes.

[0018] As a further embodiment of this utility model, the outer wall of the upper shell is a gently curved surface structure, and the upper shell is fastened to the lower shell of the hearing aid.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] This utility model discloses a dual-MIC fixed structure for a hearing aid. Due to the different orientation designs of the pickup holes, the hearing aid can pick up sound from multiple directions, thereby capturing sound information in the environment more comprehensively and improving the sound collection range and accuracy.

[0021] This utility model discloses a dual-MIC fixing structure for a hearing aid. The PCB board is positioned by screws and internal threaded cylinders. During this process, the PCB board applies a pushing force to the connecting main board, and the notched groove squeezes the connecting support plate to expand outward. The pressure column can move slightly forward towards the pickup hole, and the MIC body can press the sealing ring and dustproof plate tightly. This makes the MIC assembly stable inside the hearing aid and not easily displaced by external vibration or impact. It also improves the sealing performance of the hearing aid and can ensure the long-term stable operation of the hearing aid. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0023] Figure 1 This is an exploded view of a dual-MIC fixing structure for a hearing aid according to the present invention;

[0024] Figure 2 This is a cross-sectional view of a dual-MIC fixing structure for a hearing aid according to the present invention. Figure 1 ;

[0025] Figure 3 This is an assembly diagram of the connecting components and PCB board in a dual-MIC fixing structure for a hearing aid according to this utility model.

[0026] Figure 4 This utility model relates to a dual-MIC fixing structure for a hearing aid. Figure 1 Enlarged view of the structure at point A in the image;

[0027] Figure 5 This utility model relates to a dual-MIC fixing structure for a hearing aid. Figure 2 Enlarged view of the structure at point B in the image;

[0028] Figure 6 This is a cross-sectional view of a dual-MIC fixing structure for a hearing aid according to the present invention. Figure 2 .

[0029] The attached diagram lists the components represented by each number as follows:

[0030] 1. Top shell; 11. Sound pickup hole; 12. Bracket slot; 121. Side slot; 13. Internal threaded cylinder; 2. PCB board; 21. Positioning hole; 22. Mounting hole; 3. MIC assembly; 31. MIC body; 32. Sealing ring; 33. Dustproof plate; 4. Connecting assembly; 41. Connecting motherboard; 411. Notch; 412. Positioning post; 42. Connecting support plate; 421. Anti-movement groove; 422. Pressure post. Detailed Implementation

[0031] The present invention will be further described below with reference to the embodiments.

[0032] Please see Figure 1-6This utility model provides a dual-MIC fixing structure for a hearing aid, including an upper shell 1, a PCB board 2, a MIC assembly 3, and a connecting assembly 4. The upper shell 1 has at least two pickup holes 11 facing different directions. A bracket groove 12 is provided on the inner wall of the upper shell 1 corresponding to each pickup hole 11. The pickup hole 11 is the channel for sound to enter the hearing aid; different orientations can improve the sound collection range and accuracy. For example, one pickup hole 11 can face forward, and the other can face to the side, thus better capturing sound in different environments. The PCB board 2 is installed and fixed inside the upper shell 1. Compared to clamping the PCB board 2 between the upper shell 1 and the lower shell, pre-fixing the PCB board 2 avoids installation errors. The structure is unstable due to the difference; the MIC component 3 is housed inside the bracket slot 12, and each bracket slot 12 provides a fixed position for the MIC component 3, which facilitates the operator to quickly and accurately complete the assembly and maintenance work; and the connecting component 4 includes a connecting motherboard 41 and at least two connecting support plates 42. One side of the connecting motherboard 41 is attached to the PCB board 2, and the other side of the connecting motherboard 41 is used to press the connecting support plates 42 to abut against the MIC component 3. The connecting motherboard 41 plays the role of transmitting thrust. The connecting motherboard 41 presses the connecting support plates 42 outward to expand, so that the MIC component 3 can move slightly forward toward the pickup hole 11, which plays the role of synchronously pressing the MIC component 3, and the installation is quick.

[0033] Furthermore, the connecting motherboard 41 is provided with notches 411 at both corners away from the PCB board 2, and the notch wall of the notch 411 is perpendicular to and intersects the extension line of the pickup hole 11.

[0034] Specifically, the design of the notch 411 and the anti-movement groove 421 allows the connecting support plate 42 to expand outward when it is pushed, thereby pressing the MIC body 31 more tightly and overcoming the problem that the two MIC components 3 cannot be pressed at the same time due to the unidirectional movement of the connecting motherboard 41.

[0035] Furthermore, the MIC assembly 3 includes a MIC body 31, a sealing ring 32, and a dustproof plate 33. The MIC body 31, the sealing ring 32, and the dustproof plate 33 are arranged sequentially from the opening end of the bracket groove 12 toward the pickup hole 11. The dustproof plate 33 is exposed in the area between the pickup hole 11 and the inner diameter of the sealing ring 32 and is densely covered with small holes.

[0036] Specifically, when assembling the hearing aid, the dust cover 33, the sealing ring 32, and the microphone body 31 are placed into the bracket groove 12 in sequence. When the microphone body 31 is squeezed, the force it receives can push the sealing ring 32 to deform, so that the inner and outer sides of the sealing ring 32 are in close contact with the microphone body 31 and the dust cover 33, while the outer edge of the sealing ring 32 is in close contact with the inner wall of the bracket groove 12 to ensure the airtightness.

[0037] Specifically, the dustproof plate 33 is densely covered with small holes. These holes not only allow sound to pass through but also block larger dust particles. When sound enters the hearing aid through the pickup hole 11, the sound first passes through the small holes on the dustproof plate 33 and then passes through the inside of the sealing ring 32 to reach the microphone body 31.

[0038] Furthermore, one side of the connecting support plate 42 is provided with an anti-movement groove 421 with the same thickness as the connecting main plate 41, and the other side of the connecting support plate 42 is fixed with a pressure column 422 adapted to the bracket groove 12, and the pressure column 422 is in contact with the adjacent MIC body 31.

[0039] Specifically, when assembling the hearing aid, the notch 411 of the connecting motherboard 41 is first embedded into the anti-movement groove 421 of the connecting support plate 42 to ensure that the position of the connecting support plate 42 on the connecting motherboard 41 is stable. In this way, when positioning the PCB board 2, the PCB board 2 applies a pushing force to the connecting motherboard 41, the notch 411 squeezes the connecting support plate 42 to expand outward, and the pressure post 422 moves slightly forward towards the pickup hole 11, which can press the MIC body 31 tightly.

[0040] Furthermore, a side slot 121 is provided on one side of the bracket slot 12, and a signal transmission line for realizing the electrical connection between the MIC body 31 and the PCB board 2 is provided in the side slot 121, and the MIC body 31 is arranged in the direction of the pickup hole 11.

[0041] Specifically, when the hearing aid is working, the MIC body 31 collects external sound signals through the pickup hole 11, and the converted electrical signal is transmitted to the processing circuit on the PCB board 2 through the signal transmission line. The PCB board 2 processes the sound signal and transmits the signal to the speaker in the lower shell for playback.

[0042] Furthermore, two positioning holes 21 are provided on the PCB board 2, and a positioning post 412 corresponding to the positioning hole 21 is provided on the side of the connecting motherboard 41 facing the PCB board 2.

[0043] Specifically, the positioning post 412 is a raised columnar structure, which is inserted into the positioning hole 21 of the PCB board 2 to play a role in positioning and support.

[0044] Specifically, the positioning post 412 is circular, rectangular or semi-circular, and the size and shape of the positioning post 412 match the positioning hole 21 to ensure stable installation of the motherboard 41.

[0045] Furthermore, mounting holes 22 are provided at all four corners of the PCB board 2, and an internally threaded cylinder 13 is provided on the inner wall of the upper shell 1 corresponding to the mounting holes 22;

[0046] Specifically, during installation, the PCB board 2 is first placed in the predetermined position inside the upper shell 1, so that the mounting hole 22 on the PCB board 2 is aligned with the internal threaded cylinder 13 on the inner wall of the upper shell 1. Then, the screw is passed through the mounting hole 22 of the PCB board 2 and screwed into the internal threaded cylinder 13 on the inner wall of the upper shell 1. As the screw is tightened, the PCB board 2 is gradually pressed into the upper shell 1, reducing the assembly difficulty.

[0047] Furthermore, the outer wall of the upper shell 1 is a gently curved surface structure, and the upper shell 1 is fastened to the lower shell of the hearing aid.

[0048] Specifically, the curved upper shell 1 can reduce wind resistance, lower noise, and has an aesthetically pleasing appearance;

[0049] Specifically, the upper shell 1 and the lower shell constitute the hearing aid shell, which protects the internal electronic components of the hearing aid from damage. The snap-fit ​​connection has a certain sealing effect, which can prevent dust, moisture and other impurities from entering the hearing aid and extend the service life of the hearing aid.

[0050] The working principle includes the following installation steps:

[0051] Step 1: Place the dustproof plate 33, sealing ring 32, MIC body 31 and pressure column 422 into the bracket groove 12 in sequence;

[0052] Step 2: Insert the two notches 411 of the motherboard 41 into the anti-movement grooves 421 of the two connecting support plates 42 respectively, and align the positioning holes 21 of the PCB board 2 with the positioning posts 412 and insert them.

[0053] Step 3: After passing the screw through the mounting slot of PCB board 2, screw it into the internal threaded cylinder 13;

[0054] Step 4: During the tightening of the screws, the PCB board 2 applies a pushing force to the connecting motherboard 41. The notch 411 squeezes the connecting support plate 42 outward, and the pressure column 422 can move slightly forward toward the pickup hole 11, so that the MIC body 31 can press the sealing ring 32 and the dustproof plate 33 tightly. The sealing ring 32 deforms, which not only avoids damage to the MIC body 31, but also makes the inner and outer sides of the sealing ring 32 fit tightly with the MIC body 31 and the dustproof plate 33. The outer edge of the sealing ring 32 fits tightly with the inner wall of the bracket groove 12, ensuring the sealing performance.

Claims

1. A hearing aid dual-MIC fixture structure, characterized by include: The upper shell has at least two pickup holes facing different directions, and the inner wall of the upper shell has a support groove corresponding to each pickup hole. The PCB board is mounted and fixed inside the upper shell. The MIC assembly is housed within the bracket slot; as well as A connecting assembly includes a connecting motherboard and at least two connecting support plates, one side of the connecting motherboard being attached to a PCB board, and the other side of the connecting motherboard being used to press the connecting support plates against the MIC assembly.

2. The dual-MIC fixation structure for a hearing aid according to claim 1, characterized in that: The motherboard has slots at both corners away from the PCB board, and the slot walls are perpendicular to and intersect the extension line of the pickup hole.

3. The dual-MIC fixation structure of claim 1, wherein: The MIC assembly includes a MIC body, a sealing ring, and a dustproof plate. The MIC body, the sealing ring, and the dustproof plate are arranged sequentially from the opening end of the bracket groove towards the pickup hole. The dustproof plate is exposed in the area between the pickup hole and the inner diameter of the sealing ring and is densely covered with small holes.

4. The dual-MIC fixation structure of claim 3, wherein: One side of the connecting support plate is provided with an anti-movement groove with the same thickness as the connecting main plate, and the other side of the connecting support plate is fixed with a pressure column that is adapted to the bracket groove. The pressure column is in contact with the adjacent MIC body.

5. The dual-MIC fixation structure of claim 3, wherein: A side slot is provided on one side of the bracket groove, and a signal transmission line for connecting the MIC body to the PCB board is provided in the side slot. The MIC body is oriented towards the pickup hole.

6. The dual-MIC fixation structure of claim 1, wherein: The PCB board has two positioning holes, and the motherboard has a positioning post corresponding to the positioning hole on the side facing the PCB board.

7. The dual-MIC fixation structure of claim 1, wherein: Mounting holes are provided at all four corners of the PCB board, and an internally threaded cylinder is provided on the inner wall of the upper shell corresponding to the mounting holes.

8. The dual-MIC fixation structure of claim 1, wherein: The outer wall of the upper shell has a gently curved surface structure, and the upper shell is fastened to the lower shell of the hearing aid.

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