CN219145596U

CN219145596U - Sounding device

Info

Publication number: CN219145596U
Application number: CN202223258211.4U
Authority: CN
Inventors: 任莉; 章超
Original assignee: AAC Microtech Changzhou Co Ltd
Current assignee: AAC Microtech Changzhou Co Ltd
Priority date: 2022-12-06
Filing date: 2022-12-06
Publication date: 2023-06-06
Anticipated expiration: 2032-12-06

Abstract

The sound generating device provided by the utility model comprises a basin frame, a magnetic circuit system, and a first vibration system and a second vibration system which are arranged on two sides of the magnetic circuit system; the magnetic circuit system further comprises a first inner magnetic yoke, main magnetic steel and a second inner magnetic yoke fixed on the main magnetic steel; the first vibration system comprises a first vibrating diaphragm, a first voice coil and a first circuit board, wherein the first voice coil surrounds the outer side of the first inner magnetic yoke; the first voice coil loudspeaker voice coil includes the first bight that is located bight position, first circuit board include first fixed part, with first welding portion and the first elastic part of first voice coil loudspeaker voice coil welding, first elastic part with first voice coil loudspeaker voice coil interval sets up, first welding portion locates first bight is kept away from one side of second inner yoke. The first welding part is arranged at the outer side of the first corner, so that the magnetic field performance of the magnetic circuit system is effectively improved; and the first elastic part is not glued with the first voice coil, so that the glue overflow problem is effectively solved, and the vibration performance of the first vibration system is improved.

Description

Sounding device

[ field of technology ]

The utility model relates to the technical field of electroacoustic conversion, in particular to a sounding device for a portable mobile terminal.

[ background Art ]

With the development of portable mobile terminal technology, the requirements of people on the sound effect of the portable mobile terminal are higher and higher, and the sound emitting device in the mobile phone is one of the requirements for realizing the high-quality sound effect.

The sound emitting device in the related art generally includes a vibration system and a magnetic circuit system; the magnetic circuit system comprises a magnetic yoke, magnetic steel fixed on the magnetic yoke and a pole core fixed on the magnetic steel, the vibration system comprises a vibrating diaphragm, a voice coil for driving the vibrating diaphragm to sound and a flexible circuit board fixed between the vibrating diaphragm and the voice coil, and a bonding pad welded with the voice coil is arranged on the flexible circuit board; the bond pads are typically located above the pole piece extending to the inside of the voice coil. In order to facilitate welding, an avoidance groove which is corresponding to the welding pad and is used for avoiding the welding pad is formed in the pole core, which is equivalent to thinning the pole core part, so that the loss of the magnetic field BL is larger; in addition, through the sticky fixation between flexible circuit board and the voice coil loudspeaker voice coil, glue easily overflows to the voice coil loudspeaker voice coil both sides, influences vibration system's vibration effect.

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

[ utility model ]

The utility model aims to provide a sound generating device which is favorable for better magnetic field performance and vibration performance.

In order to achieve the above-mentioned purpose, the present utility model proposes a sound generating device, which includes a basin frame having a receiving space, a magnetic circuit system having a first magnetic gap and a second magnetic gap which are mutually communicated, and a first vibration system and a second vibration system respectively disposed at two sides of the magnetic circuit system, wherein the magnetic circuit system further includes a first inner yoke, a main magnetic steel fixed to the first inner yoke, and a second inner yoke fixed to a side of the main magnetic steel away from the first inner yoke;

the first vibration system comprises a first vibrating diaphragm fixed on the basin frame, a first voice coil inserted in the first magnetic gap and a first circuit board electrically connected with the first voice coil, and the first voice coil is rectangular and is arranged on the outer sides of the main magnetic steel and the second inner magnetic yoke in a surrounding mode;

the second vibration system comprises a second vibrating diaphragm fixed on the basin frame and a second voice coil inserted in the second magnetic gap; the first voice coil and the second voice coil are arranged in a staggered mode;

the first voice coil loudspeaker voice coil is including being located the first bight of bight position, first circuit board including be fixed in the first fixed part of basin frame, with first welding part of first voice coil loudspeaker voice coil welding and connect first fixed part with first elastic component of first welding part, first elastic component with first voice coil loudspeaker voice coil interval sets up, first welding part is located first bight is kept away from one side of second inner yoke.

Preferably, the first circuit board includes two first soldered portions, and the two first soldered portions are disposed along a diagonal line of the first voice coil.

Preferably, the magnetic circuit system comprises a first inner yoke, a main magnetic steel fixed on the first inner yoke, a second inner yoke fixed on one side of the main magnetic steel away from the first inner yoke, a side magnetic steel fixed on the basin frame, a first side yoke fixed on one side of the side magnetic steel facing the first vibrating diaphragm, a second side yoke fixed on one side of the side magnetic steel facing the second vibrating diaphragm, and a connecting part for connecting the first inner yoke and the first side yoke, wherein the first side yoke and the second inner yoke form a first magnetic gap, and the first inner yoke and the second side yoke form a second magnetic gap; the first welded portion is not overlapped with the first side yoke in the vibration direction.

Preferably, in the vibration direction, the first side yoke is provided with a relief portion corresponding to the first welded portion.

Preferably, the projection of the first voice coil along the vibration direction is located inside the second voice coil.

Preferably, the basin frame is rectangular, the edge magnetic steel is fixed on the basin frame along the long axis direction, and the connecting part is connected with the first inner magnetic yoke and the edge of the first edge magnetic yoke along the short axis direction.

Preferably, the second vibration system further includes a second circuit board electrically connected to the second voice coil, the second circuit board includes a second fixing portion fixed to one end of the second voice coil away from the second diaphragm, a second welding portion fixed to the frame, a second elastic portion connecting the second fixing portion and the second welding portion, and a third welding portion extending from the second fixing portion to an outer side of the second voice coil, and the second voice coil is electrically connected to the third welding portion.

Preferably, the number of the second circuit boards is two, and the two second circuit boards are arranged on two sides of the second voice coil along the short axis direction.

Compared with the related art, the sounding device provided by the utility model comprises a basin frame, a magnetic circuit system, and a first vibration system and a second vibration system which are respectively arranged at two sides of the magnetic circuit system; the magnetic circuit system further comprises a first inner magnetic yoke, main magnetic steel fixed on the first inner magnetic yoke, and a second inner magnetic yoke fixed on one side of the main magnetic steel away from the first inner magnetic yoke; the first vibration system comprises a first vibrating diaphragm, a first voice coil surrounding the outer side of the first inner magnetic yoke and a first circuit board electrically connected with the first voice coil; the first voice coil loudspeaker voice coil is including being located the first bight of bight position, first circuit board including be fixed in the first fixed part of basin frame, with first welding part of first voice coil loudspeaker voice coil welding and connect first fixed part with first elastic component of first welding part, first elastic component with first voice coil loudspeaker voice coil interval sets up, first welding part is located first bight is kept away from one side of second inner yoke. The first welding part is arranged on the outer side of the first corner part of the first voice coil, so that the second inner magnetic yoke does not need to be thinned to avoid the first welding part, the thickness of the second inner magnetic yoke is ensured, and the magnetic field performance of the magnetic circuit system is effectively improved; and the first elastic part is not glued with the first voice coil, so that the glue overflow problem is effectively solved, and the vibration performance of the first vibration system is improved.

[ description of the drawings ]

For a clearer description of the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the description below are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:

FIG. 1 is a perspective view of a sound emitting device of the present utility model;

FIG. 2 is an exploded view of a sound emitting device of the present utility model;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 4 is a perspective view of a portion of the structure of a sound emitting device of the present utility model;

fig. 5 is a perspective view showing a part of the structure of the sound emitting device of the present utility model.

[ detailed description ] of the utility model

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

As shown in fig. 1 to 5, the present utility model provides a sound generating device 100, which includes a basin frame 1 having a receiving space 10, a magnetic circuit system 2 received in the receiving space 10, and a first vibration system 3 and a second vibration system 4 respectively disposed at two sides of the magnetic circuit system 2; the first vibration system 3 and the second vibration system 4 are respectively fixed to opposite sides of the tub frame 1.

The first vibration system 3 includes a first diaphragm 31 fixed to the frame 1, a first voice coil 32 driving the first diaphragm 31 to vibrate and sound, and a first circuit board 33 electrically connected to the first voice coil 32.

The second vibration system 4 comprises a second vibrating diaphragm 41 fixed on the basin frame 1, a second voice coil 42 driving the second vibrating diaphragm 41 to vibrate and sound, and a second circuit board 43 electrically connected with the second voice coil 42; wherein the first voice coil 32 and the second voice coil 42 are arranged in a staggered manner; specifically, in the vibration direction, the projection of the first voice coil 32 falls into the second voice coil 42. It will be appreciated that the sound generating device 100 is rectangular, and accordingly, the frame 1, the first voice coil 32 and the second voice coil 42 are rectangular.

The magnetic circuit 2 comprises a first inner yoke 21, a main magnet steel 22 fixed on the first inner yoke 21, a second inner yoke 23 fixed on the side of the main magnet steel 22 away from the first inner yoke 21, a side magnet steel 24 fixed on the basin stand 1, a first side yoke 25 fixed on the side of the side magnet steel 24 facing the first diaphragm 31, a second side yoke 26 fixed on the side of the side magnet steel 24 facing the second diaphragm 41, and a connecting part 27 connecting the first inner yoke 21 and the first side yoke 25, wherein a first magnetic gap 28 is formed between the first side yoke 25 and the second inner yoke 23, and a second magnetic gap 29 is formed between the first inner yoke 21 and the second side yoke 26; the first magnetic gap 28 and the second magnetic gap 29 communicate with each other; wherein the first voice coil 32 is inserted into the first magnetic gap 28; the second voice coil 42 is inserted into the second magnetic gap 29. Further, the side magnetic steel 24 is fixed to the basin frame 1 along the long axis direction, and the connecting portion 27 connects the edges of the first inner yoke 21 and the first side yoke 25 along the short axis direction.

The first voice coil 32 includes a first corner 321 at a corner position, the first circuit board 33 includes a first fixing portion 331 fixed between the frame 1 and the first diaphragm 31, a first welding portion 332 welded to the first voice coil 32, and a first elastic portion 333 connecting the first fixing portion 331 and the first welding portion 332, the first elastic portion 333 and the first voice coil 32 are disposed at a distance, and the first welding portion 332 is disposed on a side of the first corner 321 away from the second inner yoke 23, i.e., an outer side of the first corner 321. Because the second inner yoke 23 has a larger effect on the BL of the magnetic circuit 2, the first welding portion 332 is disposed outside the first corner 321 of the first voice coil 32, so that the second inner yoke 23 does not need to be thinned to avoid the first welding portion 332, the thickness of the second inner yoke 23 is ensured, and the magnetic field performance of the magnetic circuit 2 is effectively improved. Specifically, the first elastic portion 333 is located outside the first voice coil 32 and is not bonded to the first voice coil 32, so that the glue overflow problem is effectively solved, and the vibration performance of the first vibration system 3 is improved.

Further, the first circuit board 33 includes two first soldered portions 332, and the two first soldered portions 332 are disposed along a diagonal line of the first voice coil 32, that is, the two first soldered portions 332 are disposed outside the two first corners 321 of the first voice coil 32 disposed along the diagonal line. As can be seen, the first welded portion 332 does not overlap the first side yoke 25 in the vibration direction; specifically, the first side yoke 25 is provided with the avoiding portion 251 corresponding to the first welding portion 332 along the vibration direction, and the avoiding portion 251 is disposed on the first side yoke 25 having a smaller influence on the magnetic circuit 2, so that not only the magnetic field performance of the magnetic circuit 2 is ensured, but also the welding between the first welding portion 332 and the first voice coil 32 is facilitated.

The second circuit board 43 includes a second fixing portion 431 fixed to an end of the second voice coil 42 away from the second diaphragm 41, a second soldering portion 432 fixed to the frame 1, a second elastic portion 433 connecting the second fixing portion 431 and the second soldering portion 432, and a third soldering portion 434 extending from the second fixing portion 431 to an outside of the second voice coil 42, and the second voice coil 42 is electrically connected to the third soldering portion 434. Specifically, two second circuit boards 43 are provided, and the two second circuit boards 43 are disposed on two sides of the second voice coil 42 along the short axis direction.

In the present utility model, as can be seen from fig. 2 to fig. 3, a front cover 5 is further disposed above the second diaphragm 41 of the second vibration system 4 (i.e., on a side far from the first vibration system 3), the front cover 5 is spaced from the first diaphragm 41, and it can be understood that an acoustic hole 51 is disposed on the front cover 5, and the acoustic wave emitted by the second diaphragm 41 is transmitted to the outside through the acoustic hole 51. As can be seen from fig. 5, the third soldering portion 432 of the second circuit board 43 is electrically connected to an external circuit through the conductive terminal 6. The sound generating device 100 further comprises a conductive member 7 embedded in the basin frame 1, and the first circuit board 33 is electrically connected with an external circuit through the conductive member 7.

While the utility model has been described with respect to the above embodiments, it should be noted that modifications can be made by those skilled in the art without departing from the inventive concept, and these are all within the scope of the utility model.

Claims

1. The utility model provides a sound production device, its includes basin frame that has accommodation space, has the magnetic circuit of first magnetic gap and second magnetic gap of intercommunication and locates respectively magnetic circuit both sides first vibration system and second vibration system, its characterized in that:

the magnetic circuit system further comprises a first inner magnetic yoke, main magnetic steel fixed on the first inner magnetic yoke, and a second inner magnetic yoke fixed on one side of the main magnetic steel away from the first inner magnetic yoke;

2. The sound emitting device of claim 1 wherein the first circuit board comprises two of the first solder joints disposed along a diagonal of the first voice coil.

3. The sound generating device of claim 1, wherein the magnetic circuit further comprises a side magnetic steel fixed to the basin frame, a first side yoke fixed to a side of the side magnetic steel facing the first diaphragm, a second side yoke fixed to a side of the side magnetic steel facing the second diaphragm, and a connecting portion connecting the first inner yoke and the first side yoke, the first side yoke and the second inner yoke forming the first magnetic gap, the first inner yoke and the second side yoke forming the second magnetic gap; the first welded portion is not overlapped with the first side yoke in the vibration direction.

4. The sound emitting device of claim 3, wherein the first side yoke is provided with a relief portion corresponding to the first welded portion in a vibration direction.

5. The sound emitting device of claim 1, wherein a projection of the first voice coil in the vibration direction is located inside the second voice coil.

6. The sound emitting device of claim 3, wherein the frame is rectangular, the side magnetic steel is fixed to the frame in a long axis direction, and the connecting portion connects edges of the first inner yoke and the first side yoke in a short axis direction.

7. The sound emitting device of claim 6, wherein the second vibration system further comprises a second circuit board electrically connected to the second voice coil, the second circuit board comprising a second fixing portion fixed to an end of the second voice coil remote from the second diaphragm, a second soldering portion fixed to the frame, a second elastic portion connecting the second fixing portion and the second soldering portion, and a third soldering portion extending from the second fixing portion to an outside of the second voice coil, the second voice coil being electrically connected to the third soldering portion.

8. The sound generating device of claim 7, wherein the number of the second circuit boards is two, and the two second circuit boards are disposed on two sides of the second voice coil in the short axis direction.