A microphone module

Abstract

The utility model provides a microphone module belongs to acoustics field, including front casing, the front casing, be equipped with containing the line road board of microphone in the front casing, be equipped with the sound pickup through -hole on the line road board, still include with the front casing sealed setting rear casing, be equipped with the sound pickup passageway on the rear casing, the sound pickup passageway includes first sound pickup passageway, with at least a second sound pickup passageway, first sound pickup passageway with second sound pickup passageway staggered setting and intercommunication, the utility model discloses the structure of sound pickup passageway, through staggered setting can realize to structure to space requirement low in a wall thickness space, structure precision is high, under the condition of not increasing other parts, not increasing assembly space and cost, solve the technical problem that the consistency is poor caused by staggered, and satisfy IPX9 level waterproof, limit the damage that high temperature high pressure water flow causes to microphone.

Description

Technical Field

[0001] This utility model relates to a microphone module. Background Technology

[0002] Intelligent driving places higher demands on the sound pickup of the vehicle's external environment. Microphone modules configured on the outside of the vehicle operate under harsher conditions, and their installation locations also require higher waterproofing. Some modules need to meet IP69 (high temperature and high pressure water flow) requirements.

[0003] Existing technical solutions: Currently, automotive external microphone modules equipped with cars mostly use brackets and other methods to resist the erosion of high temperature and high pressure water flow, so as to protect the microphone from damage. However, this method occupies a large assembly space and has a long sound pickup channel, which is not conducive to the optimization of module performance and space. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the above-mentioned traditional technology and provide a microphone module.

[0005] The purpose of this utility model is achieved through the following technical measures: a microphone module, including a front housing, a circuit board containing a microphone inside the front housing, a sound pickup through hole on the circuit board, and a rear housing sealed to the front housing, characterized in that: the rear housing is provided with a sound pickup channel, the sound pickup channel including a first sound pickup channel and at least one second sound pickup channel, the first sound pickup channel and the second sound pickup channel being offset and connected.

[0006] As an improvement, a first pickup channel chamfer is provided at the position where the first pickup channel is misaligned with the second pickup channel, and a second pickup channel chamfer is provided at the position where the second pickup channel is misaligned with the first pickup channel.

[0007] As a further improvement, the cross-section of the first pickup channel is square or racetrack-shaped.

[0008] As a further improvement, the cross-section of the second pickup channel is square or racetrack-shaped.

[0009] As a further improvement, the total height H of the pickup channels is the sum of the height h1 of the first pickup channel and the height h2 of the second pickup channel, and the height h1 of the first pickup channel is half of the total height H of the pickup channels.

[0010] As a further improvement, the length and width of the first pickup channel are 2-5 times the diameter of the pickup hole, respectively.

[0011] As a further improvement, the length and width of the second pickup channel are also 2-5 times the diameter of the pickup hole, respectively.

[0012] As a further improvement, a damping dustproof net is also provided on the outer side of the rear housing.

[0013] As a further improvement, the damping dustproof mesh is provided with a groove, which is located at a position corresponding to the position of the sound pickup channel, and the lower end of the groove extends to the outside of the damping dustproof mesh.

[0014] As a further improvement, the damping dustproof net is a foam net.

[0015] Due to the adoption of the above technical solution, the advantages of this utility model compared with the prior art are:

[0016] The structure of the pickup channel described in this utility model, through staggered arrangement, can achieve low spatial requirements and high structural precision within a single wall thickness space. It solves the technical problem of poor consistency caused by staggered arrangement without adding other parts, assembly space, or costs, and meets IPX9 waterproof level, limiting the damage to the microphone caused by high temperature and high pressure water flow.

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Appendix Figure 1 This is a schematic diagram of the utility model.

[0019] Appendix Figure 2 This is a sectional view of the utility model;

[0020] Appendix Figure 3 This is an exploded structural diagram of the utility model;

[0021] Appendix Figure 4 This is a schematic diagram of the pickup channel structure described in Embodiment 1;

[0022] Appendix Figure 5 This is a schematic diagram of the pickup channel structure described in Embodiment 2;

[0023] Appendix Figure 6 This is another structural schematic diagram of the pickup channel described in Embodiment 2;

[0024] Appendix Figure 7 This is a schematic diagram of the pickup channel described in Embodiment 3. Detailed Implementation

[0025] 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.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] Example 1: As shown in the attached document Figure 1 - Appendix Figure 4As shown, a microphone module includes an integrally injection-molded front housing 1. The front housing 1 contains a circuit board 2 housing a microphone. The circuit board 2 is soldered to the front housing 1 via solder pins to enable communication with the vehicle. The circuit board 2 has a sound pickup hole 7. The module also includes a rear housing 3 sealed to the front housing 1. The front housing 1 and the rear housing 3 are assembled and sealed using ultrasonic welding or other methods. The rear housing 3 has a sound pickup channel 4, which includes a first sound pickup channel 41 and a second sound pickup channel 42. The first sound pickup channel 41 and the second sound pickup channel 42 are offset but connected. This offset arrangement prevents water from directly impacting the sound pickup area on the waterproof and dustproof component 6, thus protecting the microphone from damage.

[0030] A first pickup channel chamfer 411 is provided at a position offset from the second pickup channel 42 on the first pickup channel 41, and a second pickup channel chamfer 421 is provided at a position offset from the first pickup channel 41 on the second pickup channel 42. The chamfer angles of the first pickup channel chamfer 411 and the second pickup channel chamfer 421 can be adjusted according to acoustic performance requirements, which can increase the direction and area of ​​the pickup channel 4, and also prevent water flow from directly impacting the pickup area of ​​the waterproof and dustproof component 6. This design greatly simplifies the structure for preventing water flow from directly impacting the inside of the module.

[0031] The cross-section of the first pickup channel 41 is square or racetrack-shaped, and the cross-section of the second pickup channel 42 is square or racetrack-shaped, or of course, other feasible shapes are also possible.

[0032] The total height H of the pickup channel 4 is the sum of the height h1 of the first pickup channel 41 and the height h2 of the second pickup channel 42, and the height h1 of the first pickup channel 41 is half of the total height H of the pickup channel 4.

[0033] The length and width of the first pickup channel 41 are three times the diameter of the pickup hole 7, respectively; the length and width of the second pickup channel 42 are also three times the diameter of the pickup hole 7, respectively.

[0034] The outer side of the rear housing 3 is also provided with a damping dustproof net 5. The damping dustproof net 5 is a foam net. The damping dustproof net 5 is provided with a groove 51. The groove 51 is located at a position corresponding to the position of the sound pickup channel 4, and the lower end of the groove 51 extends to the outer side of the damping dustproof net 5.

[0035] A waterproof and dustproof component 6 is provided between the circuit board 2 and the rear housing 3. The waterproof and dustproof component 6 is a waterproof foam mesh.

[0036] Example 2: As shown in the attached document Figure 5 Appendix Figure 6 As shown, the structure is the same as in Embodiment 1, except that it includes two second pickup channels 42, which are respectively located on the left and right sides or the top and bottom sides of the first pickup channel 41.

[0037] The total height H of the pickup channel 4 is the sum of the height h1 of the first pickup channel 41 and the height h2 of the second pickup channel 42, and the height h1 of the first pickup channel 41 is greater than half of the total height H of the pickup channel 4.

[0038] The length and width of the first pickup channel 41 are each twice the diameter of the pickup hole 7; the length and width of the second pickup channel 42 are also twice the diameter of the pickup hole 7.

[0039] Example 3: As shown in the attached document Figure 6 As shown, the structure is the same as in Embodiment 1, except that it includes four second pickup channels 42, which are respectively located at the four corners of the first pickup channel 41.

[0040] The total height H of the pickup channel 4 is the sum of the height h1 of the first pickup channel 41 and the height h2 of the second pickup channel 42, and the height h1 of the first pickup channel 41 is less than half of the total height H of the pickup channel 4.

[0041] The length and width of the first pickup channel 41 are each 5 times the diameter of the pickup hole 7; the length and width of the second pickup channel 42 are also 5 times the diameter of the pickup hole 7.

[0042] Of course, the number or position of the second pickup channel 42 can be set according to the actual needs of the product, such as one, two, three, four, etc., and the position can be adjusted accordingly based on the actual situation.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A microphone module, comprising a front housing, wherein a circuit board containing a microphone is disposed within the front housing, and the circuit board is provided with a pickup hole, and further comprising a rear housing sealed to the front housing, characterized in that: The rear housing is provided with a sound pickup channel, which includes a first sound pickup channel and at least one second sound pickup channel. The first sound pickup channel and the second sound pickup channel are offset from each other and connected.

2. A microphone module according to claim 1, characterized in that: The first pickup channel has a chamfer at a position offset from the second pickup channel, and the second pickup channel has a chamfer at a position offset from the first pickup channel.

3. A microphone module according to claim 2, characterized in that: The cross-section of the first pickup channel is square or racetrack-shaped.

4. A microphone module according to claim 2, characterized in that: The cross-section of the second pickup channel is square or racetrack-shaped.

5. A microphone module according to any one of claims 2-4, characterized in that: The total height H of the pickup channels is the sum of the height h1 of the first pickup channel and the height h2 of the second pickup channel, and the height h1 of the first pickup channel is half of the total height H of the pickup channels.

6. A microphone module according to any one of claims 2-4, characterized in that: The length and width of the first pickup channel are 2-5 times the diameter of the pickup hole, respectively.

7. A microphone module according to any one of claims 2-4, characterized in that: The length and width of the second pickup channel are also 2-5 times the diameter of the pickup hole, respectively.

8. A microphone module according to claim 1, characterized in that: The outer side of the rear housing is also provided with a damping dustproof net.

9. A microphone module according to claim 8, characterized in that: The damping dustproof mesh is provided with a groove, which is located at a position corresponding to the position of the sound pickup channel, and the lower end of the groove extends to the outside of the damping dustproof mesh.

10. A microphone module according to claim 9, characterized in that: The damping dustproof net is a foam net.

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