CN206894884U - Microphone device - Google Patents

Abstract

The utility model discloses a sound-generating device, which comprises a pot frame, an FPC fixed on the pot frame, a vibration system and a magnetic circuit system respectively fixed on the pot frame, the vibration system includes a diaphragm and a voice coil, and the magnetic The circuit system includes a yoke, a main magnet and a secondary magnet, the FPCs are respectively located on the other opposite sides of the main magnet, and the side of the main magnet close to the FPC is provided with a A recessed relief groove in the central direction of the FPC, the welding part of the FPC is accommodated in the relief groove, and the voice coil wire of the voice coil is fixed and electrically connected to the welding part. Compared with the related art, the acoustic performance of the sound emitting device of the utility model is better.

Description

Sound device

technical field

The utility model relates to a sounding device, in particular to a sounding device used in portable electronic products.

Background technique

In the process of rapid development of portable devices such as mobile phones, people have increasingly strong requirements for the functionality of products. For the music appreciation function of mobile phones, in order to make the entertainment effect stronger, the mode of music with vibration appears. Therefore, the development of sound-generating devices has also accelerated accordingly.

The sound-generating device in the related art includes a frame, a vibration system and a magnetic circuit system respectively fixed on the frame, a flexible printed circuit board (Flexible Printed Circuit, FPC) fixed on the frame, and embedded in the frame and The exposed soldering piece, the vibration system includes a diaphragm and a voice coil, the voice coil wire of the voice coil is led out to the external power supply of the sound-generating device through the FPC, and the magnetic circuit system includes a main magnet and is arranged on the Describe the auxiliary magnets on opposite sides of the main magnet.

However, in the sound-generating device of the related art, the voice coil wire is led out from the side of the voice coil close to the secondary magnetic steel, so that the welding part of the FPC is located at the position of the secondary magnetic steel, Therefore, the area occupied by the auxiliary magnet needs to be reduced to design a relief part, and at the same time, the R angle of the main magnet must be as large as possible to allow the FPC to give way. Due to the abdication design of the auxiliary magnet and the main magnet, the performance loss of the magnetic circuit system is relatively large, thereby reducing the acoustic performance of the sound-generating device.

Therefore, it is necessary to provide a new sound emitting device to solve the above technical problems.

Utility model content

The purpose of the utility model is to overcome the above-mentioned technical problems and provide a sounding device with good acoustic performance.

The utility model provides a sound-generating device, which comprises a pot frame, an FPC fixed on the pot frame, a vibration system and a magnetic circuit system respectively fixed on the pot frame, and the vibration system includes a vibrator fixed on the pot frame. membrane and a voice coil that drives the vibration of the diaphragm, the magnetic circuit system includes a yoke, a main magnetic steel fixed to the yoke, the voice coil is combined with one side of the diaphragm and extends from the diaphragm Extending to the outer periphery of the main magnetic steel, the voice coil has a voice coil lead terminal electrically connected to the FPC, and the side of the main magnetic steel close to the voice coil lead terminal is provided with a center of the main magnetic steel A recessed relief slot, the FPC includes a first fixed arm fixed to the basin frame, a second fixed arm fixedly connected to the voice coil, connecting the first fixed arm and the second fixed arm The elastic arm and the welding part extended from the second fixed arm, the welding part is accommodated in the relief groove, and the voice coil lead terminal is fixed and electrically connected to the welding part.

Preferably, the voice coil is racetrack-shaped, and the FPC is arranged on the side of the short axis of the voice coil.

Preferably, the magnetic circuit system further includes auxiliary magnets installed on the yoke and symmetrically arranged on both sides of the main magnet, the main magnet and the auxiliary magnet are spaced to form a magnetic gap, the The long axis side of the voice coil at least partially extends into the magnetic gap.

Preferably, the FPCs are arranged in pairs and are respectively located on opposite sides of the main magnet corresponding to the short axis side of the voice coil.

Preferably, the voice coil lead terminal is located in the middle of the short axis side of the voice coil.

Preferably, the voice coil lead terminals include two and lead out from the two short axis sides respectively, and the welding parts correspond to the voice coil lead terminals one by one.

Preferably, the magnetic yoke is a planar structure.

Preferably, the magnetic circuit system further includes a main pole core attached to the main magnetic steel and an auxiliary pole core attached to the auxiliary magnetic steel.

Preferably, the sound-generating device further includes a soldering piece embedded in the frame and partially exposed, and the FPC is fixedly and electrically connected to the soldering piece.

Preferably, the first fixed arm is electrically connected to the solder piece, and the elastic arm conducts the first fixed arm and the second fixed arm.

Compared with the prior art, in the sound emitting device of the present utility model, the short-axis side of the main magnetic steel is provided with the relief groove, and the welding part of the FPC is accommodated in the accommodation groove and The voice coil wire of the voice coil is fixedly electrically connected, and the above-mentioned structure makes it unnecessary to design an abdication structure in other structures of the loudspeaker, and the corner part of the main magnet does not need to be a design abdication, so that its R angle can be as small as possible. That is, the performance loss of the magnetic circuit system is small, thereby making the acoustic performance of the sound-generating device better.

Description of drawings

Fig. 1 is the exploded view of the three-dimensional structure of the sounding device of the present invention;

FIG. 2 is an exploded view of part of the structure of FIG. 1 .

detailed description

The utility model will be further described below in conjunction with drawings and embodiments.

Please refer to Figures 1-2, the utility model provides a sounding device 100, including a basin frame 1, a vibration system 2 for generating vibration and sound, a magnetic circuit system 3 for generating an electromagnetic field to drive the vibration system 2 to vibrate, FPC 4 and solder tab 5. Power is introduced into the vibration system 2 through the FPC 4 , so that the magnetic circuit system 3 generates a magnetic field to further drive the vibration system 2 to vibrate and produce sound.

The vibration system 2 is fixed on the frame 1 , and includes a diaphragm 21 fixed on the frame 1 and a voice coil 22 that drives the diaphragm 21 to vibrate. The voice coil 22 is led out to an external power source through the FPC 4 .

The voice coil 22 has a voice coil lead terminal 221 electrically connected to the FPC 4 . In this embodiment, the voice coil 22 is racetrack-shaped, and the FPC 4 is arranged on one side of the short axis of the voice coil 22 . The voice coil lead terminal 221 is located in the middle of the short axis side of the voice coil 22 . The voice coil lead terminals 221 include two and lead out from the two short axis sides respectively. In other preferred embodiments of the present invention, the Suso voice coil lead terminal 221 may also be arranged only on one side of the short axis.

The magnetic circuit system 3 is fixed to the frame 1 , and includes a yoke 31 fixed to the frame 1 , a main magnet 32 and a secondary magnet 33 installed and fixed on the yoke 31 . The voice coil 22 is combined with one side of the diaphragm 21 and extends from the diaphragm 21 to the outer periphery of the main magnet 32 .

In this embodiment, the magnetic yoke 31 is a planar structure. Of course, its structure is not limited to this.

A side of the main magnet 32 close to the voice coil lead terminal 221 is provided with a relief groove 321 that is recessed toward the center of the main magnet 32 . More preferably, the relief groove 321 is located in the middle of the side of the main magnetic steel 32 close to the FPC 4 . The setting of the position of the structure will not affect the performance of the main magnetic steel 32 .

The auxiliary magnet 33 is installed on the yoke 31 and symmetrically arranged on both sides of the main magnet 32. The main magnet 32 and the auxiliary magnet 33 form a magnetic gap (not labeled). The long axis side of the voice coil 22 at least partially extends into the magnetic gap. In this embodiment, the auxiliary magnetic steel 33 is correspondingly located on the side of the long axis of the voice coil 22 .

In this embodiment, the magnetic circuit system 3 further includes a main pole core 34 attached to the main magnetic steel 32 and an auxiliary pole core 35 attached to the auxiliary magnetic steel 33 . The main pole core 34 and the secondary pole core 35 are used for magnetic conduction to enhance the performance of the magnetic circuit system 3 .

The FPC 4 is used to carry the circuit, and it is fixed on the frame 1 . The FPC 4 includes two and are located on opposite sides of the main magnetic steel 32 . In this embodiment, specifically, in this embodiment, the FPCs 4 are arranged in pairs and located on opposite sides of the main magnet 32 corresponding to the short axis side of the voice coil 22 .

The FPC 4 includes a first fixed arm 41 fixed to the basin frame 1, a second fixed arm 42 fixedly connected to the voice coil 22, and a second fixed arm 42 connected to the first fixed arm 41 and the second fixed arm 42. The elastic arm 43 and the welding portion 44 extending from the second fixed arm 42 . The welding portion 44 is accommodated in the relief groove 321 , and the voice coil wire 221 of the voice coil 22 is electrically connected to the welding portion 44 .

It should be noted that the welding portion 44 corresponds to the voice coil lead terminals 221 one by one. That is, the welding portion 44 is divided into two parts, which are respectively used to connect with the positive pole and the negative pole of the voice coil wire 221 .

The welding piece 5 is embedded in the basin frame 1 and partly exposed, and the exposed part is used for connecting with an external power circuit. The FPC 4 is fixedly electrically connected to the soldering piece 5 . The first fixed arm 41 is electrically connected to the solder piece 5 , and the elastic arm 43 conducts the first fixed arm 41 and the second fixed arm 42 .

In this embodiment, the soldering piece 5 and the frame 1 are integrally formed by injection molding, which increases the structural stability of the sound-generating device 100 .

Compared with the prior art, in the sound emitting device of the present utility model, the short-axis side of the main magnetic steel is provided with the relief groove, and the welding part of the FPC is accommodated in the accommodation groove and The voice coil wire of the voice coil is electrically connected, and the above-mentioned structure makes it unnecessary to design a relief structure for the secondary magnet, and the main magnet does not need to be designed to give way so that its R angle can be as small as possible, that is, the magnet The performance loss of the circuit system is small, which in turn makes the acoustic performance of the sound-generating device better.

The above descriptions are only examples of the utility model, and are not intended to limit the patent scope of the utility model. Any equivalent structure or equivalent process transformation made by using the utility model specification and accompanying drawings may be directly or indirectly used in other applications. Related technical fields are all included in the patent protection scope of the present utility model in the same way.

Claims (10)

1. A sounding device, comprising a frame, an FPC fixed to the frame, and a vibrating system and a magnetic circuit system respectively fixed to the frame, the vibrating system comprising a vibrating membrane and a magnetic circuit system fixed to the frame The voice coil that drives the diaphragm to vibrate, the magnetic circuit system includes a yoke and a main magnetic steel fixed to the yoke, the voice coil is combined with one side of the diaphragm and extends from the diaphragm to The outer periphery of the main magnetic steel, the voice coil has a voice coil lead terminal electrically connected to the FPC, it is characterized in that, the side of the main magnetic steel close to the voice coil lead terminal is provided with a A recessed relief slot in the central direction of the FPC, the FPC includes a first fixed arm fixed to the frame, a second fixed arm fixedly connected to the voice coil, connecting the first fixed arm and the second The elastic arm of the fixed arm and the welding part extended from the second fixed arm, the welding part is accommodated in the relief groove, and the voice coil lead terminal is fixedly and electrically connected to the welding part. 2 . The sound generating device according to claim 1 , wherein the voice coil is racetrack-shaped, and the FPC is arranged on a side of the short axis of the voice coil. 3 . 3. The sound-generating device according to claim 2, wherein the magnetic circuit system further comprises auxiliary magnets installed on the yoke and arranged symmetrically on both sides of the main magnet, the main magnet A magnetic gap is formed at a distance from the secondary magnetic steel, and the long axis side of the voice coil at least partially extends into the magnetic gap. 4 . The sound-generating device according to claim 2 , wherein the FPCs are arranged in pairs and are respectively located on opposite sides of the main magnet corresponding to the short-axis side of the voice coil. 5 . The sound-generating device according to claim 2 , wherein the voice coil lead terminal is located in the middle of the short axis side of the voice coil. 6 . 6. The sound-generating device according to claim 4, wherein the voice coil lead terminals include two and are respectively drawn from the two short axis sides, and the welding part is connected to the voice coil lead terminals one by one. correspond. 7. The sound emitting device according to claim 3, characterized in that, the magnetic yoke is a planar structure. 8. The sound-generating device according to claim 3, wherein the magnetic circuit system further comprises a main pole core attached to the main magnet and an auxiliary pole core attached to the auxiliary magnet. 9 . The sound-generating device according to claim 1 , further comprising a soldering piece embedded in the frame and partially exposed, and the FPC is fixedly and electrically connected to the soldering piece. 10 . 10 . The sound emitting device according to claim 9 , wherein the first fixed arm is electrically connected to the solder piece, and the elastic arm conducts the first fixed arm and the second fixed arm. 11 .