CN102480538A - Mobile terminal with microphone - Google Patents

Abstract

The present invention provides a mobile terminal with a microphone. The mobile terminal includes a housing and a circuit board arranged inside the housing. The housing is provided with a sound inlet channel, and the inner side of the housing is corresponding to the sound inlet channel. There is an extension part, and an electret microphone is placed in the accommodating cavity formed by the extension part, and the receiving surface of the microphone faces the sound inlet channel, and is fixed on the circuit board through the electric connection part at the other end. The above design of the mobile terminal can ensure the consistency of microphone audio and improve audio performance.

Description

A mobile terminal with a microphone

technical field

The invention belongs to the technical field of microphones, in particular to a mobile terminal with a microphone.

Background technique

Microphones, also known as microphones, microphones, microphones, etc., are energy conversion devices that convert sound signals into electrical signals. Microphones have been developed from resistive conversion to inductive and capacitive conversion. A large number of new microphone technologies gradually developed. Electret microphone is a kind of condenser microphone. Because of its simple production process and low cost, it is suitable for mass production. At the same time, it is small in size and convenient to use. In communication systems such as telephones, cameras, repeaters and mobile phones and other portable electronic devices.

For electret microphones, in order to achieve better sound quality, it is necessary to consider the design of its sound inlet channel. Referring to the sectional view of a partial structure of a mobile terminal with a microphone in the prior art in FIG. The sound channel 4 is a curved structure, one end leads to the outside of the housing 3, and the other end faces the receiving surface of the microphone 1. The casing is covered with a rubber sleeve 5 made of silicone material to seal the joint surface between the receiving surface of the microphone 1 and the sound inlet channel 4 to form a sound guide channel 51, so that the sound can enter the sound inlet channel 4 from the outside of the housing and be transmitted to the guide. The sound channel 51 is transmitted to the receiving surface of the microphone 1, and the microphone 1 can complete sound pickup.

The inventor of this patent found in the process of research and practice in the prior art: in the above solution, during the use of the mobile terminal, when the rubber sleeve used for sealing is squeezed from the casing above it, it is easy to Deformation occurs, and the microphone becomes a force-bearing body, which leads to poor audio performance consistency of the microphone, and unknown noises are prone to occur when the shell is squeezed. In addition, in the long run, the microphone will be damaged, and it is difficult to guarantee the stability of the microphone.

Contents of the invention

To solve one of the above problems, the present invention provides a mobile terminal with a microphone, which can improve the consistency and stability of the audio performance of the microphone and the reliability of the sound input channel of the microphone.

The present invention is achieved through the following technical solutions:

A mobile terminal with a microphone, the mobile terminal includes a housing and a circuit board disposed inside the housing, the housing is provided with a sound inlet channel, and the housing is provided with an extension corresponding to the inner side of the sound inlet channel, An electret microphone is placed in the accommodating cavity formed by the extension part, and the receiving surface of the microphone faces the sound inlet channel, and is fixed on the circuit board through the electric connection part at the other end.

It can be seen that by setting an extension part inside the sound inlet channel of the casing, the electret microphone is placed in the accommodation cavity formed by the extension part, and is fixed on the circuit board through the electrical connection part at the other end of the microphone. The force of the body directly acts on the circuit board, so it can avoid the direct force of the microphone from the shell, so when the shell is subjected to external force, it will not directly squeeze the microphone, so the microphone can be protected, and the hard shell is not easy to deform, so It can ensure the consistency of microphone audio and improve audio performance. Moreover, since the circuit board is usually relatively rigid and tough, and there are enough brackets around the circuit board, the force acting on the circuit board by the casing will not cause damage to the circuit board.

Description of drawings

FIG. 1 is a cross-sectional view of a partial structure of a mobile terminal with a microphone in the prior art;

Fig. 2 is a cross-sectional view of a partial structure of a mobile terminal with a microphone in an embodiment of the present invention.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

The mobile terminal with a microphone provided by the embodiment of the present invention includes a housing and a circuit board arranged inside the housing, the housing is provided with a sound inlet channel, and the inner side of the housing corresponding to the sound inlet channel is provided with an extension part, an electret microphone is placed in the accommodating cavity formed by the extension part, the receiving surface of the microphone faces the sound inlet channel, and is fixed on the circuit board through the electrical connection part at the other end.

With reference to the sectional view of the partial structure of a mobile terminal with a microphone in the embodiment of the present invention shown in Figure 2, the mobile terminal includes: an electret microphone 1, a circuit board 2 and a housing 3, and the circuit board 2 is arranged on the housing 3 to form a Inside the cavity, the housing 3 is provided with a sound inlet channel 4, and the inner side of the housing 3 corresponding to the sound inlet channel 4 is provided with an extension part 31, and the electret microphone 1 is placed in the accommodation cavity 311 formed by the extension part. 1 is facing the sound inlet channel 4, and is fixed on the circuit board 2 through the electrical connection part at the other end. In this way, the external sound is transmitted to the receiving surface of the microphone 1 located in the accommodating cavity 311 formed by the extension part 31 through the transmission of the sound inlet channel, and then the sound is picked up by the microphone 1 .

It can be seen that by setting the extension part 31 inside the sound inlet channel 4 corresponding to the housing 3, the microphone 1 is placed in the accommodating cavity 311 formed by the extension part 31, and through the electrical connection part at the other end of the microphone 1 Fixed on the circuit board 2, the force of the shell 3 acts directly on the circuit board 2, so the microphone 1 can be prevented from being directly stressed from the shell 3, so when the shell 3 is subjected to external force, it will not directly squeeze the microphone 1, Therefore, the microphone 1 can be protected, and the rigid casing 3 is not easily deformed, so the audio consistency of the microphone 1 can be ensured and the audio performance can be improved. Moreover, because the rigidity and toughness of the circuit board 2 are usually relatively large, and there are enough brackets around the circuit board, the force acting on the circuit board 2 by the casing 3 will not cause damage to the circuit board.

In a specific implementation, in order to enhance the sealing effect and improve the audio effect of the microphone, the gap between the extension part 31 and the circuit board 2 may be filled with a sealing material. Referring to FIG. 2 , the gap between the extension portion 31 and the circuit board 2 is filled with foam 6 .

In a specific implementation, considering factors such as the audio effect of the microphone and the ease of installation, the distance between the inner wall of the accommodating cavity 311 formed by the extension part 31 and the shell of the microphone 1 is kept at 2mm-3mm.

The accommodating cavity 311 formed by the extension portion 31 may have a rectangular, elliptical or circular cross-section.

In a specific implementation, the sound inlet channel 4 toward which the receiving surface of the microphone 1 faces may be straight and lead directly to the outside of the terminal.

In order to further enhance the audio effect of the microphone and prevent dust from directly falling on the receiving surface of the microphone to block the sound input, the sound input channel 4 facing the receiving surface of the microphone 1 can be designed as a curved shape, as shown in Figure 2. The channel 4 includes a first channel 41 and a second channel 42 connected at right angles to it, wherein the other end of the first channel 41 faces the receiving surface of the microphone 1 , and the other end of the second channel 42 leads directly to the outside of the terminal. Wherein, the first channel 1 facing the receiving surface of the microphone 1 may also be referred to as a sound chamber.

For the curved sound inlet channel 4, the shape of the channel can be further improved to further improve the audio effect. Referring to the sectional view shown in FIG. 2 , the longitudinal section of the first channel 41 is designed as a rectangle; the longitudinal section of the second channel 42 is designed as a tapered shape gradually narrowing toward the interior of the sound inlet channel. The longitudinal section of the second channel 42 is designed as a tapered shape gradually narrowing toward the inside of the sound inlet channel, which can gather sound better.

In specific applications, according to the cost and design requirements, the microphone can choose the connector type or the SMT (Surfaced Mounting Technology, surface mount technology) patch type. Correspondingly, the electrical connection part of the microphone can be called The socket part or the patch part. When the plug part is used to connect with the circuit board, the plug terminals can be inserted into the corresponding jacks on the circuit board and connected with soldering tin. According to needs, the plug terminals can be bent to match the position of the sound inlet channel. When using the patch part to connect to the circuit board, the microphone can be directly fixed on the circuit board by SMT patch technology.

Referring to FIG. 2 , in a specific implementation, in order to enhance the firmness of the mobile terminal housing 3 and fix the circuit board 2 inside the housing 3 , a fixing device can be provided on the inner wall of the housing 3 outside the circuit board 2 and the extension portion 31 . Rib 7.

In specific implementation, considering the arrangement of components on the circuit board and the appearance design requirements of the mobile terminal housing, the opening side of the sound inlet channel 4 leading to the outside of the mobile terminal can be arranged on the front panel of the housing, or on the on the rear panel or side wall of the housing.

Those skilled in the art can understand that the mobile terminal described in the embodiment of the present invention can be a mobile phone, and can also be a PDA (Personal Digital Assistant, personal digital assistant), MP3 (Moving Picture Experts Group Audio Layer III, moving picture expert compression Standard audio level 3) Audio players or other portable electronic devices that can be equipped with microphones.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (10)

1. portable terminal with microphone; It is characterized in that comprise housing and the circuit board that is arranged on enclosure interior, said housing is provided with into sound passage; The inboard that said housing correspondence is advanced the sound passage is provided with extension; Place electret microphone in the formed containing cavity of said extension, said microphone receive the words face towards advancing the sound passage, and be fixed on the said circuit board through the electrical connection section of the other end.

2. portable terminal according to claim 1 is characterized in that the gap between said extension and the circuit board is filled with encapsulant.

3. portable terminal according to claim 2 is characterized in that said encapsulant is specially foam.

4. portable terminal according to claim 1 is characterized in that, the spacing between the inwall of the formed containing cavity of said extension and the shell of said microphone is 2mm-3mm.

5. portable terminal according to claim 1 is characterized in that, the formed containing cavity cross section of said extension is a rectangle, oval or circular.

6. portable terminal according to claim 1 is characterized in that, said microphone receive the words face towards the sound passage that advances be the straight way type, directly lead to the terminal outside.

7. portable terminal according to claim 1; It is characterized in that; Said microphone receive the words face towards the sound passage that advances be curved road type; Comprise that first passage reaches and its second channel that at right angles is connected, the other end of said first passage receives the words face over against microphone, the other end directintermination outside of second channel.

8. portable terminal according to claim 7 is characterized in that, the longitudinal section of said first passage is a rectangle; The longitudinal section of said second channel is to advancing the diminishing taper of sound channel interior.

9. portable terminal according to claim 1 is characterized in that, the electrical connection section of said microphone is specially Plug Division or paster portion.

10. portable terminal according to claim 1 is characterized in that, is provided with fixedly reinforcement at the above circuit board of said inner walls and extension exterior lateral area.

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