CN217406704U

CN217406704U - External vehicle-mounted microphone module

Info

Publication number: CN217406704U
Application number: CN202221503345.5U
Authority: CN
Inventors: 周智健; 王焕焕; 葛斌
Original assignee: Changzhou Yuanjing Electronic Technology Co ltd
Current assignee: Bestar Holding Co ltd
Priority date: 2022-06-16
Filing date: 2022-06-16
Publication date: 2022-09-09
Anticipated expiration: 2032-06-16

Abstract

The utility model relates to a microphone field, concretely relates to external on-vehicle microphone module. The utility model provides an external on-vehicle microphone module, include: a microphone adapted to collect sound; a pickup housing within which the microphone can be placed; wherein the microphone can be installed with the automobile panel by splitting through the sound pickup shell. The vehicle-mounted microphone module is simple in structure and convenient to install, the microphone is fixed in the ABS pickup shell and connected with the client through the connecting wire and the plug, and the microphone can be installed at any required position according to the requirements of clients. The sensitivity of inside microphone pickup can be promoted to the pickup cavity structure, and the cooperation is adjusted the connecting wire and is changed the pickup hole and point to, has strengthened the effective sound source pickup ability to required direction, reduces vibration and noise interference that the installation side brought.

Description

External vehicle-mounted microphone module

Technical Field

The utility model relates to a microphone field, concretely relates to external on-vehicle microphone module.

Background

With the continuous upgrade of the automobile industry, the development of the vehicle-mounted communication system is rapid, and the performance requirements of the key parts of the vehicle-mounted microphone in the communication system are also continuously improved. The microphone pickup environment is comparatively complicated among the automobile operation process, and the conduction of mechanical vibration and all kinds of ambient noise easily lead to the reduction of communication quality. Ordinary external on-vehicle microphone mainly passes through the support mounting in the panel before the car, and mounting structure is complicated, receives support vibration conduction and environmental sound interference easily to arouse the big, the unclear scheduling problem of conversation noise at the bottom of the conversation.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an external on-vehicle microphone module to solve above-mentioned problem. In order to achieve the above object, an embodiment of the present invention provides an external vehicle-mounted microphone module, including: a microphone adapted to collect sound;

a pickup housing within which the microphone can be placed; wherein

The microphone can be installed through the pickup shell and the automobile panel in a split mode.

Furthermore, the pickup housing comprises an upper housing and a lower housing, wherein one end of the lower housing is provided with a receiving groove, and the receiving groove corresponds to the microphone;

the end face of the lower shell is also provided with a plurality of connecting grooves, and the connecting grooves are positioned on the outer side of the accommodating groove;

one end of the upper shell is provided with a plurality of connecting columns, and the connecting columns correspond to the connecting grooves; wherein

The connecting column can be inserted into the corresponding connecting groove until the end face of the upper shell and the accommodating groove form a closed accommodating cavity.

Furthermore, the vehicle-mounted microphone module further comprises a patch cord, wherein one end of the patch cord is connected with the microphone, and the other end of the patch cord is connected with the client.

Furthermore, a wire passing hole is formed in the side wall of the lower shell and communicated with the bottom wall of the accommodating groove; wherein

The patch cord is connectable with the back side of the microphone through the cord passing hole.

Furthermore, the wire passing hole is U-shaped, and the width of the wire passing hole is the same as the diameter of the single wire of the patch cord.

Furthermore, a sound pickup hole is formed in the side wall of the upper shell, a sound pickup cavity is further formed in the upper shell along the length direction, one end of the sound pickup cavity is communicated with the sound pickup hole, and the other end of the sound pickup cavity can be communicated with the accommodating groove;

the diameter of the sound-collecting cavity is smaller than that of the accommodating groove.

Further, the microphone comprises an aluminum shell and a PCB circuit board arranged on one side of the aluminum shell;

the PCB circuit board is connected with the aluminum shell in a sealing mode, and the patch cord can be electrically connected with one side, far away from the aluminum shell, of the PCB circuit board.

Furthermore, a copper ring is fixed on the PCB, a polar plate is fixed at one end of the copper ring, which is far away from the PCB, and a plastic ring is fixed on the outer wall of the copper ring;

the copper ring, the polar plate and the plastic ring are concentrically arranged;

the outer wall of the plastic ring is attached to the inner wall of the aluminum shell;

a gasket is fixed on one side of the polar plate, which is far away from the copper ring, and an FEP (fluorinated ethylene propylene) membrane is fixed on one side of the gasket, which is far away from the polar plate;

one side of the FEP membrane far away from the gasket is attached to the aluminum shell.

Furthermore, a plurality of capacitance resistors and JFET type field effect transistors are further fixed on the PCB, and the capacitance resistors and the JFET type field effect transistors are arranged on the inner side of the copper ring.

Furthermore, a waterproof film is attached to one side, away from the PCB, of the aluminum shell.

Compared with the prior art, the embodiment of the utility model provides a following beneficial effect has: the utility model discloses an external on-vehicle microphone module. Simple structure simple to operate, the microphone is fixed in ABS pickup housing, is connected with the customer end through connecting wire and plug, can install in arbitrary required position according to customer's demand. The ABS pickup shell side is provided with the pickup hole and is communicated with the pickup cavity inside, the pickup cavity structure can improve the pickup sensitivity of the internal microphone, and the pickup hole is directional by matching and adjusting the connecting wire, so that the sensitivity of the external vehicle-mounted microphone module is more than or equal to-32 dB, the signal-to-noise ratio is more than 60dB, the effective sound source pickup capacity in the required direction is enhanced, and the vibration and noise interference caused by the installation side is reduced.

Drawings

The present invention will be further described with reference to the accompanying drawings and examples.

Fig. 1 shows a perspective view of an external vehicle-mounted microphone module according to the present invention;

fig. 2 shows an exploded view of the sound pickup housing of the present invention;

fig. 3 shows a cross-sectional view of a microphone of the present invention.

In the figure:

1. a microphone; 11. an aluminum housing; 12. a PCB circuit board; 121. a capacitance resistor; 122. JFET type field effect transistor; 13. a copper ring; 14. a pole plate; 15. a plastic ring; 16. a gasket; 17. an FEP film; 18. a water-resistant film;

2. a pickup housing; 21. an upper housing; 211. connecting columns; 212. a sound pickup hole; 213. a sound-collecting cavity; 22. a lower housing; 221. accommodating grooves; 222. connecting grooves; 223. a wire passing hole; 23. a cavity;

3. a patch cord; 31. a plug.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

As shown in fig. 1 to 3, an external vehicle microphone module includes: microphone 1, sound pick-up housing 2 and patch cord 3. Microphone 1 is adapted to pick up sound, and sound pickup housing 2 is adapted to house microphone 1. The patch cord 3 is adapted to connect the microphone 1 with a customer premises. With respect to the above components, a detailed description is given below.

Sound pickup shell 2

The sound pickup shell 2 is of a split type design, namely the sound pickup shell 2 is divided into an upper shell 21 and a lower shell 22, and the ends of the upper shell 21 and the lower shell 22 can be spliced together along the length direction. The microphone 1 can be placed between the upper casing 21 and the lower casing 22, and after the upper casing 21 and the lower casing 22 are connected, the microphone 1 can be wrapped to encapsulate the microphone 1.

In order to facilitate the installation of the microphone 1, one end of the lower housing 22 is opened with a receiving groove 221, and the receiving groove 221 corresponds to the microphone 1. Specifically, the diameter of the accommodation groove 221 is the same as that of the microphone 1, and the microphone 1 can be axially placed in the accommodation groove 221. Meanwhile, because the end of the lower housing 22, which is provided with the accommodating groove 221, is connected with the upper housing 21, after the connection is completed, the end face of the upper housing 21 facing the lower housing 22 and the accommodating groove 221 form a accommodating cavity 23, and the microphone 1 can axially slide in the accommodating cavity 23.

In order to facilitate the connection between the upper casing 21 and the lower casing 22, a plurality of connection grooves 222 are further formed in the end surface of the lower casing 22, and the connection grooves 222 are located outside the receiving grooves 221. A plurality of connecting posts 211 are arranged at one end of the upper housing 21, and the connecting posts 211 correspond to the connecting slots 222. When installed, the connection posts 211 can be inserted into the corresponding connection slots 222, thereby achieving the connection of the upper and

lower housings

21 and 22. After the installation, the gap between the connection column 211 and the connection groove 222 is filled with solvent glue for sealing and fixing, so as to form the sound pickup housing 2. Through the arrangement, the pickup shell 2 after combination is integrally fixed firmly, vibration of the installation side of the client side can be resisted, and the internal microphone 1 is protected from being influenced by abnormal environments and pollutants.

In order to facilitate the insertion of the patch cord into the sound pickup housing 2 and the electrical connection with the microphone 1, a wire through hole 223 is formed in the side wall of the lower housing 22, and the wire through hole 223 is communicated with the bottom wall of the accommodating groove 221. One end of the patch cord 3 can pass through the wire through hole 223 to enter the interior of the lower casing 22 and be welded with the welding point on the back side of the microphone 1.

In order to avoid the influence of the wire harness disturbance on the sound collection of the microphone 1, the wire passing hole 223 is U-shaped, and the width of the wire passing hole 223 is the same as the diameter of the single wire of the patch cord 3. When the patch cord 3 passes through the wire passing hole 223, glue is dispensed on the contact surface of the single wire of the patch cord 3 and the bottom of the wire passing hole 223, so that the patch cord 3 is not affected by the disturbance of the outer side wire harness, and the pickup stability of the microphone 1 is improved.

In order to improve the sound collecting effect of the microphone 1, a sound collecting hole 212 is formed in the side wall of the upper housing 21, a sound collecting cavity 213 is further formed in the upper housing 21 along the length direction, one end of the sound collecting cavity 213 is communicated with the sound collecting hole 212, and the other end of the sound collecting cavity can be communicated with the accommodating groove 221. The pick-up chamber 213 can enhance the sound source received at the pick-up hole 212 and the sound sources in other directions are weakened by the blocking of the housing, thereby improving the sensitivity of the microphone 1. By changing the mounting direction of the sound pickup hole 212, mechanical noise of other components around the microphone 1 can be reduced during operation of the automobile, and the pickup capability of an effective sound source can be enhanced. The diameter of the sound collecting cavity 213 is smaller than that of the accommodating groove 221, so that the accommodating cavity 23 is tightly attached to the microphone 1, and in the working process, the microphone 1 is ensured not to generate abnormal conditions such as deflection displacement, and the microphone 1 is ensured to stably collect an external sound source.

It should be noted that, in order to better adapt to the complex working environment in the automobile panel, the upper shell 21 and the lower shell 22 both use black ABS material, which has the effects of strong hardness, corrosion resistance, impact resistance, large temperature resistance range, etc., so that the vehicle-mounted microphone 1 module achieves the optimal practical effect.

In addition, in order to improve the interchangeability of the upper housing 21 and the lower housing 22 and reduce the manufacturing cost, in the embodiment, it is preferable that the upper housing 21 and the lower housing 22 are designed to be matched by two identical components, so that the component mismatch condition is not generated in the assembling process, the installation and the replacement are convenient, and the material cost is also reduced.

Patch cord 3

When the microphone is installed, one end of the patch cord 3 can pass through the wire through hole 223 to enter the interior of the lower shell 22, and is welded with a welding point on the back side of the microphone 1, so as to realize the electrical connection of the microphone 1. The other end of the patch cord 3 is electrically connected to a plug 31, and the plug 31 can be connected to a vehicle-mounted client to enable the microphone 1 to be electrically operated.

After the installation, pickup housing 2 can drive microphone 1 removes in the ball-type space that uses patch cord 3 as the radius. Through the arrangement of the patch cord 3, the installation position of the sound pickup shell 2 can be adjusted at will according to the requirements of customers.

Microphone 1

The microphone 1 includes an aluminum case 11 and a PCB circuit board 12 disposed at one side of the aluminum case 11. The PCB 12 is hermetically connected to the aluminum housing 11, and the patch cord 3 can be electrically connected to a side of the PCB 12 away from the aluminum housing 11. A copper ring 13 is fixed on the PCB 12, a polar plate 14 is fixed at one end of the PCB 12 far away from the copper ring 13, and a plastic ring 15 is fixed on the outer wall of the copper ring 13. The copper ring 13, the polar plate 14 and the plastic ring 15 are concentrically arranged. The outer wall of the plastic ring 15 is attached to the inner wall of the aluminum shell 11. A gasket 16 is fixed on one side of the polar plate 14 far away from the copper ring 13, and an FEP membrane 17 is fixed on one side of the gasket 16 far away from the polar plate 14. The side of the FEP membrane 17 away from the gasket 16 is attached to the aluminum case 11. The PCB 12 is further fixed with a plurality of capacitive resistors 121 and JFET field effect transistors 122, and each capacitive resistor 121 and the JFET field effect transistor 122 are disposed inside the copper ring 13. A waterproof film 18 is fixed on one side of the aluminum shell 11 far away from the PCB 12. The aluminum case 11 is a housing member, and serves to house and support internal parts. The aluminum shell 11 is made of aluminum-magnesium alloy materials, the surface of the aluminum shell is subjected to oxidation resistance treatment, and a through hole is formed in the center of the aluminum shell 11 to enhance the conduction capability of an external sound source. The waterproof membrane 18 is made of IP67 waterproof material, and plays a role in protecting the microphone 1 from dust and water. The back of the film body is a rubber surface which is concentrically attached to the aluminum shell 11. The gum is annular along the cloth of membrane avris glue, and central authorities are non-gum area, correspond 11 through-holes departments of aluminium casing, and the reducible sound source attenuation of this structure is favorable to the sound wave to inside conduction. The FEP diaphragm 17, the gasket 16, the polar plate 14, the plastic ring 15 and the copper ring 13 are core components for receiving a sound source of the microphone 1, and the parts are matched with each other to realize the sound source pickup function of the microphone 1. FEP diaphragm 17 adopts high temperature resistant electret material, and thickness is 2um, and copper ring 13 and the cooperation of aluminium casing 11 can not produce the displacement of left and right directions. The FEP diaphragm 17 generates vertical mechanical vibration along with sound waves after receiving external sound waves. The polar plate 14, the plastic ring 15 and the copper ring 13 are in concentric tight fit to form three parts together. The surface of the plate 14 is polarized with electric charges, and the copper ring 13 supports the plate 14 and links the component PCB 12. The plastic ring 15 tightly wraps the polar plate 14 and the copper ring 13, so that the plastic ring 15, the polar plate 14 and the copper ring 13 are fixed in the aluminum shell 11 and play a role in insulating the shell. The gasket 16 is made of high temperature resistant polyester film material and is tightly installed in the FEP membrane 17 and the polar plate 14 to form an air gap. The FEP membrane 17, the plate 14 and the air gap form a plate capacitor. When sound waves pass through the sound pickup hole 212 of the aluminum case 11 and reach the FEP diaphragm 17, the FEP diaphragm 17 vibrates up and down, so that the distance between the capacitor plates 14 changes, causing a change in capacitance. Since the amount of charge of the plate 14 is constant, the change in capacitance causes a voltage change, thereby converting the sound signal into an electric signal to be output. The capacitance resistor 121, the JFET type field effect transistor 122 and the PCB 12 are electric signal processing components, a circuit on the PCB 12 receives a voltage signal with weak front-end change, the capacitance resistor 121 and the JFET type field effect transistor 122 perform amplification processing, and the circuit is disconnected to output an available electric signal to a terminal.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An external vehicle microphone module, comprising:

a microphone (1), the microphone (1) being adapted to pick up sound;

a pickup housing (2), the microphone (1) being placeable within the pickup housing (2); wherein

The microphone (1) can be installed in a split mode through the sound pickup shell (2) and the automobile panel.

2. The external vehicle microphone module of claim 1,

the sound pickup shell (2) comprises an upper shell (21) and a lower shell (22), one end of the lower shell (22) is provided with a containing groove (221), and the containing groove (221) corresponds to the microphone (1);

the end face of the lower shell (22) is also provided with a plurality of connecting grooves (222), and the connecting grooves (222) are positioned on the outer side of the accommodating groove (221);

one end of the upper shell (21) is provided with a plurality of connecting columns (211), and the connecting columns (211) correspond to the connecting grooves (222); wherein

The connecting column (211) can be inserted into the corresponding connecting groove (222) until the end face of the upper shell (21) and the accommodating groove (221) form a closed accommodating cavity (23).

3. The external vehicle microphone module of claim 2,

the vehicle-mounted microphone module further comprises a patch cord, one end of the patch cord (3) is connected with the microphone (1), and the other end of the patch cord is connected with a client.

4. The external vehicle microphone module of claim 3,

a line passing hole (223) is formed in the side wall of the lower shell (22), and the line passing hole (223) is communicated with the bottom wall of the accommodating groove (221); wherein

The patch cord (3) can be connected to the rear side of the microphone (1) through the line passage hole (223).

5. The external vehicle microphone module of claim 4,

the wire through hole (223) is U-shaped, and the width of the wire through hole (223) is the same as the diameter of a single wire of the patch cord (3).

6. The external vehicle microphone module of claim 5,

a sound pickup hole (212) is formed in the side wall of the upper shell (21), a sound pickup cavity (213) is further formed in the upper shell (21) along the length direction, one end of the sound pickup cavity (213) is communicated with the sound pickup hole (212), and the other end of the sound pickup cavity can be communicated with the accommodating groove (221);

the diameter of the sound-collecting cavity (213) is smaller than that of the accommodating groove (221).

7. The external vehicle microphone module of claim 6,

the microphone (1) comprises an aluminum shell (11) and a PCB (printed circuit board) (12) arranged on one side of the aluminum shell (11);

the PCB (12) is connected with the aluminum shell (11) in a sealing mode, and the patch cord (3) can be electrically connected with one side, far away from the aluminum shell (11), of the PCB (12).

8. The external vehicle microphone module of claim 7,

a copper ring (13) is fixed on the PCB (12), a polar plate (14) is fixed at one end of the copper ring (13) far away from the PCB (12), and a plastic ring (15) is fixed on the outer wall of the copper ring (13);

the copper ring (13), the polar plate (14) and the plastic ring (15) are concentrically arranged;

the outer wall of the plastic ring (15) is attached to the inner wall of the aluminum shell (11);

a gasket (16) is fixed on one side of the polar plate (14) far away from the copper ring (13), and an FEP (fluorinated ethylene propylene) membrane (17) is fixed on one side of the gasket (16) far away from the polar plate (14);

the side, far away from the gasket (16), of the FEP membrane (17) is attached to the aluminum shell (11).

9. The external vehicle microphone module of claim 8,

the PCB circuit board (12) is further fixedly provided with a plurality of capacitance resistors (121) and JFET type field effect transistors (122), and each capacitance resistor (121) and each JFET type field effect transistor (122) are arranged on the inner side of the copper ring (13).

10. The external vehicle microphone module of claim 9,

and a waterproof film (18) is attached to one side of the aluminum shell (11) far away from the PCB (12).