External microphone

Abstract

The utility model discloses a microphone outside a vehicle, which comprises a shell, an upper cover which is arranged on the shell and forms a PCBA (Printed Circuit Board Assembly) mounting cavity, a PCBA positioned in the shell and a waterproof component arranged on the outer side of a pickup hole on the shell, and is characterized in that an annular boss for forming a waterproof component mounting cavity is arranged on the shell; the waterproof assembly is arranged in the waterproof assembly installation cavity, and a drainage channel is arranged between the waterproof assembly and the annular boss. The beneficial effects of the utility model are that: 1, by designing the drainage channel between the waterproof assembly and the housing, water entering the housing can be rapidly drained; the two sound channels are arranged in a staggered mode, the impact force of water flow can be greatly reduced through the staggered layout, and the water flow is prevented from directly impacting the waterproof breathable film.

Description

Technical Field

[0001] The utility model belongs to the field of sound collection equipment, in particular to an external microphone of a vehicle. Background Art

[0002] With the development of voice interaction technology, cars are becoming more and more intelligent. Car microphones can be used to perform navigation, make phone calls, listen to music and many other functions, which enhances the controllability of the vehicle. Currently, car microphones are mainly installed in the cockpit, and voice interaction outside the car is not possible. If a distributed microphone array is installed on the outside of the car body, a series of functions such as unlocking the vehicle, opening the trunk, turning off the headlights, and even automatic parking can be achieved through voice control, further enhancing the intelligence of the car.

[0003] Due to the harsh working conditions, the microphone outside the car is easily impacted by water flow, which affects the sound reception. The applicant's prior application CN 216057413 U discloses a new type of car microphone that can resist the impact of water flow, but when the water flow is small, it will still flow into the cavity and is not easy to be discharged. Summary of the invention

[0004] The problem to be solved by the utility model is to provide an off-vehicle microphone, in which a drainage channel is designed between a waterproof component and a shell, so that water entering the waterproof component can be discharged in time.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: an off-vehicle microphone, comprising a shell, an upper cover installed on the shell and forming a PCBA installation cavity, a PCBA located in the shell, and a waterproof component arranged on the outside of the sound pickup hole of the shell. The key lies in: an annular boss for forming a waterproof component installation cavity is provided on the shell, the waterproof component is arranged in the waterproof component installation cavity, and a drainage channel is provided between the waterproof component and the annular boss.

[0006] Furthermore, the waterproof component includes a waterproof sound-permeable membrane, a waterproof spacer and a mask mounted on the outside of the annular boss, which are arranged in sequence from the inside to the outside of the waterproof component installation cavity on the shell. The waterproof spacer is provided with a spacer sound channel leading to the sound pickup hole, and the mask is provided with a mask sound channel parallel to and staggered with the spacer sound channel. The cross-sectional surfaces of the spacer sound channel and the mask sound channel are both strip-shaped.

[0007] Furthermore, the drainage channel includes a drainage groove arranged on the side of the waterproof spacer and communicated with the bottom of the spacer sound channel, and a drainage hole arranged on the annular boss and communicated with the drainage groove.

[0008] Furthermore, a through hole is provided on the mask and located outside the drainage hole.

[0009] Furthermore, the waterproof spacer includes a first spacer located above the waterproof sound-permeable membrane and a second spacer located above the first spacer.

[0010] A plurality of first grid bars are arranged on the first spacer sleeve, and a plurality of second grid bars are arranged on the second spacer sleeve to be inserted into the gaps between adjacent first grid bars.

[0011] The gap between the first grille bar and the second grille bar is arranged to form a spacer sound channel, or a channel groove is provided on the first grille bar or the second grille bar to cooperate with the second grille bar or the first grille bar to form the spacer sound channel.

[0012] Furthermore, a first groove and a second groove for forming a drainage groove are respectively provided on the side walls of the first spacer and the second spacer, the cross-section of the first groove is L-shaped, and the top of the second groove is located on the inner side of the drainage hole.

[0013] Furthermore, a positioning hole is provided on the first spacer sleeve, and a positioning boss matched with the positioning hole is provided on the second spacer sleeve.

[0014] Furthermore, a dustproof net is provided between the waterproof spacer and the mask.

[0015] Furthermore, a bottom groove extending toward the spacer sound channel is provided on the mask and located at the inner end of the mask sound channel.

[0016] Furthermore, an EVA pad is provided on the inner side of the sound pickup hole.

[0017] The beneficial effects of the utility model are: 1. By designing a drainage channel between the waterproof component and the shell, water entering the shell can be quickly discharged; 2. The two sound channels are staggered, and the staggered layout can greatly reduce the impact force of the water flow and avoid the water flow directly impacting the waterproof breathable membrane.

[0018] The utility model is described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view of the external vehicle microphone of the utility model;

[0020] Figure 2 yes Figure 1 Sectional view along AA direction;

[0021] Figure 3 It is a three-dimensional structural schematic diagram of the external microphone of the utility model;

[0022] Figure 4 It is a structural schematic diagram of the housing of the external vehicle microphone of the utility model;

[0023] Figure 5 It is a schematic diagram of the installation of a waterproof spacer in the external microphone of the utility model;

[0024] Figure 6 It is a structural schematic diagram of the first spacer in the external vehicle microphone of the utility model;

[0025] Figure 7 It is a structural schematic diagram of the second spacer in the external vehicle microphone of the utility model;

[0026] Figure 8 The utility model is a structural schematic diagram of a mask in an external vehicle microphone.

[0027] In the accompanying drawings, 1, shell, 1-1, sound pickup hole, 1-2, annular boss, 1-3, waterproof component installation cavity, 1-4, drainage hole, 1-5, limiting groove, 1-6, positioning ridge, 2, upper cover, 3, PCBA, 4, waterproof sound-permeable membrane, 5, mask, 5-1, through hole, 5-2, positioning groove, 5-3, bottom groove, 6, first spacer, 6-1, first grille bar, 6-2, first groove, 6-3, channel groove, 6-4, positioning hole, 6-5, limiting boss, 7, second spacer, 7-1, second grille bar, 7-2, second groove, 7-3, positioning boss, 8, dustproof net, 9, EVA pad, 10, rubber pad, a, spacer sound channel, b, mask sound channel, c, drainage groove. DETAILED DESCRIPTION

[0028] See attached Figure 1-8 The utility model provides an off-vehicle microphone, comprising a housing 1, an upper cover 2 installed at the opening of the housing 1 and forming a PCBA installation cavity, a PCBA 3 located in the housing 1, and a waterproof component arranged outside a sound pickup hole 1-1 on the housing 1. An EVA pad 9 is provided on the inner side of the sound pickup hole 1-1 to ensure that no sound is leaked. The housing 1 and the upper cover 2 are connected by a buckle and a rubber pad 10 is provided between the two. When the two are connected by the buckle, the rubber pad 10 is compressed to achieve sealing to achieve waterproofing.

[0029] See attached Figure 4 , an annular boss 1-2 for forming a waterproof component installation cavity 1-3 is provided on the housing 1, a part of the annular boss 1-2 is located outside the housing 1, and the other part extends to the inside of the housing 1. The sound pickup hole 1-1 is located at the bottom center of the installation cavity. In a specific implementation, the annular boss 1-2 and the housing 1 are an integrated structure. By providing a drainage channel between the waterproof component and the annular boss 1-2, when water enters the waterproof component, it will be discharged from the drainage channel to avoid affecting the microphone reception.

[0030] See attached Figure 2 and 8The waterproof component includes a waterproof sound-permeable membrane 4, a waterproof spacer, and a mask 5 mounted on the outside of the annular boss 1-2, which are sequentially arranged in the waterproof component installation cavity 1-3 from the inside to the outside. The waterproof spacer is provided with a plurality of spacer sound channels a leading to the sound pickup hole 1-1, and the mask 5 is provided with a plurality of mask sound channels b arranged in parallel and staggered with the spacer sound channels a. The cross-sections of the spacer sound channels a and the mask sound channels b are both strip-shaped, and the width of the spacer sound channel a is smaller than the width of the mask sound channel b. The staggered arrangement of the two sound channels can effectively prevent the impact of water, greatly reduce the impact force of the water flow, and prevent the water flow from directly impacting the waterproof sound-permeable membrane 4, so that the microphone can reach the protection level of IP69K.

[0031] See attached Figure 8 Since the gap between the top of the waterproof spacer and the mask 5 is small, in order to ensure the sound pickup effect, a bottom groove 5-3 extending to the spacer sound channel a on one side or both sides and extending to the top of the spacer sound channel a is provided at the inner end of the mask sound channel b, so that the sound can enter the spacer sound channel a through the groove. In addition, the same effect can be achieved by increasing the gap between the mask 5 and the top of the waterproof spacer.

[0032] See attached Figure 2 , 5 -7, the waterproof spacer includes a first spacer 6 located above the waterproof sound-permeable membrane 4 and a second spacer 7 located above the first spacer 6. A plurality of first grille bars 6-1 are provided on the first spacer 6. A plurality of second grille bars 7-1 are provided on the second spacer 7 to be inserted into the gaps between the adjacent first grille bars 6-1. The bottom of the first grille bar 6-1 is located in the through hole of the spacer, and the top extends upward to the outside of the spacer. The top of the second grille bar 7-1 is located in the through hole of the spacer, and the bottom extends downward to the outside of the spacer. When the first spacer 6 and the second spacer 7 are installed, the top surface of the first grille bar 6-1 is substantially flush with the top surface of the second spacer 7 or lower than the top surface of the second spacer 7. A channel groove 6-3 is provided on the first grille bar 6-1 or the second grille bar 7-1 to cooperate with the second grille bar 7-1 or the first grille bar 6-1 to form the spacer sound channel a. In addition, the gap between the first grille bar 6-1 and the second grille bar 7-1 can also be set to form the spacer sound channel a. In this embodiment, the channel grooves 6 - 3 are provided in the first grid bars 6 - 1 , three of the first grid bars 6 - 1 are provided, and two of the second grid bars 7 - 1 are provided.

[0033] See attached Figure 3-8 The drainage channel includes a drainage groove c arranged on the side of the waterproof spacer and a drainage hole 1-4 arranged on the annular boss 1-2 and communicating with the drainage groove c. A through hole 5-1 is arranged on the mask 5 and located outside the drainage hole 1-4. When the microphone is installed, the drainage channel is arranged to be tilted downward, and the drainage hole 1-4 is at the lowest point. Under the action of gravity, the water in the cavity is discharged through the drainage channel.

[0034] The drainage groove c includes a first groove 6-2 and a second groove 7-2 respectively arranged on the side walls of the first spacer 6 and the second spacer 7. The cross section of the first groove 6-2 is L-shaped so that it can communicate with the bottom of the spacer sound channel a, and the top of the second groove 7-2 is located inside the drainage hole 1-4.

[0035] In order to align the first groove 6-2 and the second groove 7-2 after installation, a positioning hole 6-4 is provided on the first spacer 6, and a positioning boss 7-3 matching the positioning hole 6-4 is provided on the second spacer 7. A limiting groove 1-5 is provided in the annular boss 1-2, and a limiting boss 6-5 is provided on the outer side of the first spacer 6. Through the limited cooperation formed between the boss and the groove, the drainage groove c in the waterproof spacer can be exactly located at the drainage hole 1-4 after the first spacer 6 is installed.

[0036] See attached Figure 3 , 4 and 8, a positioning rib 1-6 is provided between the outer side of the shell 1 and the annular boss 1-2, and a positioning groove 5-2 is provided on the mask 5 for cooperating with the positioning rib to achieve positioning.

[0037] See attached Figure 2 A dustproof net 8 is provided between the waterproof spacer and the mask 5 to prevent external dust and other debris from entering the channel. Specifically, the dustproof net 8 is arranged on the end surface of the annular boss 1-2 and is pressed against the annular boss 1-2 by the mask 5.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for protection of the utility model.

Claims

1. An off-vehicle microphone, comprising a housing (1), an upper cover (2) mounted on the housing (1) and forming a PCBA mounting cavity, a PCBA (3) located in the housing (1), and a waterproof component arranged outside a sound pickup hole (1-1) on the housing (1), characterized in that: An annular boss (1-2) for forming a waterproof component installation cavity (1-3) is provided on the housing (1); the waterproof component is arranged in the waterproof component installation cavity (1-3); and a drainage channel is provided between the waterproof component and the annular boss (1-2).

2. The off-vehicle microphone according to claim 1, characterized in that: The waterproof component comprises a waterproof sound-permeable membrane (4), a waterproof spacer, and a mask (5) sleeved outside the annular boss (1-2) which are arranged in sequence from the inside to the outside in the waterproof component installation cavity (1-3); a spacer sound channel (a) leading to the sound pickup hole (1-1) is provided on the waterproof spacer; a mask sound channel (b) parallel to and staggered with the spacer sound channel (a) is provided on the mask (5); and the cross-sections of the spacer sound channel (a) and the mask sound channel (b) are both strip-shaped.

3. The off-vehicle microphone according to claim 2, characterized in that: The drainage channel comprises a drainage groove (c) arranged on the side of the waterproof spacer and communicating with the bottom of the spacer sound channel (a), and a drainage hole (1-4) arranged on the annular boss (1-2) and communicating with the drainage groove (c).

4. The off-vehicle microphone according to claim 3, characterized in that: A through hole (5-1) is provided on the mask (5) and is located outside the drainage hole (1-4).

5. The off-vehicle microphone according to claim 3, characterized in that: The waterproof spacer comprises a first spacer (6) located above the waterproof sound-permeable membrane (4) and a second spacer (7) located above the first spacer (6). A plurality of first grid bars (6-1) are provided on the first spacer sleeve (6), and a plurality of second grid bars (7-1) are provided on the second spacer sleeve (7) to be inserted into gaps between adjacent first grid bars (6-1). The first grille bar (6-1) and the second grille bar (7-1) are spaced apart to form a spacer sound channel (a), or a channel groove (6-3) is provided on the first grille bar (6-1) or the second grille bar (7-1) to cooperate with the second grille bar (7-1) or the first grille bar (6-1) to form the spacer sound channel (a).

6. The off-vehicle microphone according to claim 5, characterized in that: A first groove (6-2) and a second groove (7-2) for forming a drainage groove (c) are respectively provided on the side walls of the first spacer (6) and the second spacer (7); the cross-section of the first groove (6-2) is L-shaped, and the top of the second groove (7-2) is located on the inner side of the drainage hole (1-4).

7. The off-vehicle microphone according to claim 5, characterized in that: A positioning hole (6-4) is provided on the first spacer (6), and a positioning boss (7-3) matching the positioning hole (6-4) is provided on the second spacer (7).

8. The off-vehicle microphone according to claim 2, characterized in that: A dustproof net (8) is provided between the waterproof spacer and the mask (5).

9. The off-vehicle microphone according to claim 2, characterized in that: A bottom groove (5-3) extending toward the spacer sound channel (a) is provided on the mask (5) and located at the inner end of the mask sound channel (b).

10. The off-vehicle microphone according to any one of claims 1 to 9, characterized in that: An EVA pad (9) is provided on the inner side of the sound pickup hole (1-1).

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