Shockproof fixing structure of high-sensitivity microphone module

Abstract

The utility model relates to microphone technical field, specifically is a kind of shockproof fixing structure of high sensitivity microphone module, comprising: substrate, top cover and protection mechanism, the substrate is fixedly connected together with top cover by screw, the opposite end of substrate and top cover is all set with positioning slot;The protection mechanism is two elastic protection frames, two the elastic protection frame is embedded respectively in the inside of two positioning slots, two the elastic protection frame is pasted, the opposite end of two the elastic protection frame is all set with inlay groove;Protection mechanism can fix all side direction corner of PCB board under the cooperation extrusion positioning effect of top cover and substrate, so that the PCB board with microphone module can be all-round buffering protection, and further improve the stability when the microphone module overall operation, to solve the problem that high sensitivity microphone module shockproof fixing structure exists difficult all-round shockproof.

Description

Technical Field

[0001] This utility model relates to the field of microphone technology, and in particular to a shockproof fixing structure for a high-sensitivity microphone module. Background Technology

[0002] A microphone module is a component that converts sound signals into electrical signals. Microphone modules are widely used in various audio devices, such as telephones, mobile phones, recording equipment, stage sound systems, and conference systems. With the development of IoT technology, microphone modules are also finding increasing applications in smart homes, smart security, and other fields.

[0003] Currently, a Chinese patent discloses a microphone module (authorization announcement number CN222016734U), which directly attaches one side of the seal to the PCBA and the other side to the mounting panel, saving the use of a lower shell and a buffer seal, effectively shortening the length of the sound channel, thereby improving acoustic performance; it can also effectively save costs; the overall height of the microphone module is reduced, saving assembly space.

[0004] As can be seen from the above reference case, the device uses an elastic seal between the PCBA and the mounting panel to provide shock absorption. However, this only provides shock absorption when the PCBA vibrates in the direction of the elastic seal. When the vibration force is parallel to the direction of the elastic seal, the vibration force will still be transmitted to the PCBA because the ribs and the upper shell are in direct rigid contact with the PCBA, making it difficult to ensure that the microphone can operate stably.

[0005] Therefore, a shockproof fixing structure for a high-sensitivity microphone module is proposed to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a shockproof fixing structure for a high-sensitivity microphone module in order to solve the above-mentioned problems, thereby improving the problem that the shockproof fixing structure of the high-sensitivity microphone module is difficult to provide all-round shockproof protection.

[0007] This utility model achieves the above-mentioned objective through the following technical solution: a shockproof fixing structure for a high-sensitivity microphone module, comprising: a base plate, a top cover, and a protective mechanism, wherein the base plate and the top cover are fixedly connected together by screws, and positioning grooves are provided at opposite ends of the base plate and the top cover.

[0008] Preferably, the number of the protective mechanism is two elastic protective frames, and the two elastic protective frames are respectively embedded in the two positioning grooves. The two elastic protective frames are in contact with each other, and the opposite ends of the two elastic protective frames are provided with fitting grooves.

[0009] Preferably, the elastic protective frame is a silicone material component, and the cross-sectional shape of the contact area between the elastic protective frame and the positioning groove is a matching rectangle.

[0010] Preferably, each of the two elastic protective frames has a rectangular opening at its opposite ends that communicates with the fitting groove, and the inner diameter of the rectangular opening is smaller than the inner diameter of the fitting groove.

[0011] Preferably, the cross-sectional shape of the two elastic protective frames at opposite ends is serrated, and the two elastic protective frames mesh with each other.

[0012] Preferably, a first reinforcing rib is embedded inside the elastic protective frame. The first reinforcing rib is rectangular in shape and is located on the outside of the fitting groove.

[0013] Preferably, a second reinforcing rib is embedded inside the elastic protective frame. The second reinforcing rib is rectangular in shape and is located on the outside of the rectangular opening.

[0014] Preferably, the top cover has a connection port at one end facing away from the substrate, and an elastic sealing ring is embedded in the inner side of the connection port.

[0015] The beneficial effects of this utility model are:

[0016] 1. The protective mechanism can fix all sides and corners of the PCB board under the squeezing and positioning action of the top cover and the base plate, so that the PCB board with the microphone module can be buffered and protected in all directions, thereby improving the overall stability of the microphone module during operation, so as to solve the problem that the anti-vibration fixing structure of the high-sensitivity microphone module is difficult to protect against all-round vibration.

[0017] 2. An elastic protective frame with serrated end faces is adopted. When the vibration force in a certain direction is transmitted to the elastic protective frame or PCB board, the local serrated end faces that intersect with the vibration force in that direction can mesh and rub against each other to consume the vibration force, thereby accelerating the stabilization rate of the microphone module. Attached Figure Description

[0018] Figure 1 This is a schematic diagram showing the connection between the overall structure and the microphone module in this utility model;

[0019] Figure 2 This is a cross-sectional view of the overall structure and microphone module of this utility model;

[0020] Figure 3 for Figure 2 Enlarged view of A in the middle;

[0021] Figure 4 This is a schematic diagram of the protective mechanism in this utility model;

[0022] Figure 5 This is an explosion diagram of the protective mechanism in this utility model.

[0023] In the figure: 100, substrate; 200, top cover; 210, connection port; 300, positioning groove; 400, protection mechanism; 410, elastic protective frame; 411, fitting groove; 412, rectangular opening; 420, first reinforcing rib; 430, second reinforcing rib; 500, elastic sealing ring. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] In practical implementation: such as Figure 1-5 As shown, a shockproof fixing structure for a high-sensitivity microphone module includes: a base plate 100, a top cover 200, and a protective mechanism 400. The base plate 100 and the top cover 200 are fixedly connected together by screws, and positioning grooves 300 are provided at opposite ends of the base plate 100 and the top cover 200.

[0026] The high-sensitivity microphone module includes, but is not limited to, a PCB board, a signal processing chip, a microphone module, an interface, and other structures. The bottom of the substrate 100 has a countersunk hole, and the bottom of the top cover 200 has a threaded hole. A screw that is threaded into the countersunk hole is inserted into the threaded hole. The top of the substrate 100 has a sound hole facing the microphone module. A breathable and waterproof membrane can be embedded inside the sound hole as needed.

[0027] like Figure 3 , Figure 4 and Figure 5 As shown, the protection mechanism 400 consists of two elastic protection frames 410. The two elastic protection frames 410 are respectively embedded in the interior of the two positioning slots 300. The two elastic protection frames 410 fit together, and each of the opposite ends of the two elastic protection frames 410 is provided with a fitting slot 411. The shape of the fitting slot 411 needs to be customized according to the actual shape of the contact surface of the PCB board. The specific shape will not be described here.

[0028] The elastic protective frame 410 is made of silicone material. The cross-sectional shape of the contact area between the elastic protective frame 410 and the positioning groove 300 is a matching rectangle. This can improve the elasticity of the elastic protective frame 410 and improve the buffering effect on the microphone module.

[0029] Both elastic protective frames 410 have rectangular openings 412 at their opposite ends that communicate with the fitting grooves 411. The inner diameter of the rectangular openings 412 is smaller than the inner diameter of the fitting grooves 411. This not only ensures that the structure on the PCB can pass through the elastic protective frames 410 normally, but also reduces the probability of heat accumulation on the PCB due to the large area of ​​the elastic protective frames 410 covering the PCB, thereby reducing the operating temperature of the microphone module.

[0030] The cross-sectional shape of the two elastic protective frames 410 at opposite ends is serrated. The two elastic protective frames 410 mesh with each other. The elastic protective frames 410 with serrated end faces can dissipate the vibration force by meshing and rubbing the local serrated end faces that intersect with the vibration force in that direction when the vibration force in a certain direction is transmitted to the elastic protective frame 410 or the PCB board, thereby accelerating the stabilization rate of the microphone module.

[0031] The elastic protective frame 410 has a first reinforcing rib 420 embedded inside. The first reinforcing rib 420 is rectangular in shape and is located on the outside of the fitting groove 411. The elastic protective frame 410 also has a second reinforcing rib 430 embedded inside. The second reinforcing rib 430 is rectangular in shape and is located on the outside of the rectangular opening 412. This can enhance the nesting and wrapping effect of the elastic protective frame 410 on the PCB board, effectively slow down the aging and loosening rate of the elastic protective frame 410, and thus extend the service life of the protective mechanism 400.

[0032] The top cover 200 has a connection port 210 at one end facing away from the substrate 100. An elastic sealing ring 500 is embedded in the inner side of the connection port 210. The elastic sealing ring 500 is fitted onto the surface of the interface when the top cover 200 is installed on the top of the substrate 100. This not only ensures that the protection mechanism 400 can properly buffer the PCB board, but also seals the gap between the interface and the connection port 210 to reduce the probability of external moisture penetrating into the interior of the top cover 200.

[0033] Working principle: When the operator needs to install the PCB board with the microphone module between the base plate 100 and the top cover 200, firstly, manually remove the screws, then remove the top cover 200, then separate the two elastic protective frames 410, place the PCB board in the lower fitting groove 411, then fit the fitting groove 411 of the upper elastic protective frame 410 onto the upper surface of the PCB board, so that the two elastic protective frames 410 are in contact, finally attach the top cover 200 to the base plate 100, and insert the upper positioning groove 300 into the upper elastic protective frame 410, finally pass the screw through the countersunk hole and thread it into the threaded hole, and firmly lock the top cover 200 and the base plate 100 together. At this time, under the pressure and positioning action of the top cover 200 and the base plate 100, the two elastic protective frames 410 can fix all the side corners of the PCB board, so that the PCB board with the microphone module can be buffered and protected in all directions, thereby improving the overall stability of the microphone module during operation.

[0034] It should be noted that the PCB board, signal processing chip, microphone module, and interface mentioned above are all components with relatively mature existing technologies. Specific models can be selected according to actual needs. At the same time, the signal processing chip and microphone module can be powered by an internal power supply or an external power supply. The specific power supply method should be selected according to the situation, and will not be elaborated here.

[0035] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A shockproof fixing structure for a high-sensitivity microphone module, characterized in that, include: The substrate (100) and the top cover (200) are fixedly connected together by screws, and positioning grooves (300) are provided at opposite ends of the substrate (100) and the top cover (200). The protective mechanism (400) consists of two elastic protective frames (410), which are respectively embedded in the two positioning grooves (300). The two elastic protective frames (410) are in contact with each other, and each of the opposite ends of the two elastic protective frames (410) is provided with a fitting groove (411).

2. The shockproof fixing structure for a high-sensitivity microphone module according to claim 1, characterized in that: The elastic protective frame (410) is a silicone material component, and the cross-sectional shape of the contact part between the elastic protective frame (410) and the positioning groove (300) is a matching rectangle.

3. The shockproof fixing structure for a high-sensitivity microphone module according to claim 1, characterized in that: Both of the two elastic protective frames (410) have rectangular openings (412) at opposite ends that communicate with the fitting groove (411), and the inner diameter of the rectangular openings (412) is smaller than the inner diameter of the fitting groove (411).

4. The shockproof fixing structure for a high-sensitivity microphone module according to claim 1, characterized in that: The cross-sectional shape of the two elastic protective frames (410) at opposite ends is serrated, and the two elastic protective frames (410) mesh with each other.

5. The shockproof fixing structure for a high-sensitivity microphone module according to claim 1, characterized in that: The elastic protective frame (410) is internally fitted with a first reinforcing rib (420), which is rectangular in shape and located on the outside of the fitting groove (411).

6. The shockproof fixing structure for a high-sensitivity microphone module according to claim 1, characterized in that: The elastic protective frame (410) is internally fitted with a second reinforcing rib (430), which is rectangular in shape and located on the outside of the rectangular opening (412).

7. The shockproof fixing structure for a high-sensitivity microphone module according to claim 1, characterized in that: The top cover (200) has a connection port (210) at one end facing away from the base plate (100), and an elastic sealing ring (500) is embedded in the inner side of the connection port (210).

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