CN107454523B

CN107454523B - Sound production device

Info

Publication number: CN107454523B
Application number: CN201710755773.4A
Authority: CN
Inventors: 吴树文; 宋威
Original assignee: AAC Technologies Pte Ltd
Current assignee: AAC Technologies Pte Ltd
Priority date: 2017-08-29
Filing date: 2017-08-29
Publication date: 2021-02-23
Anticipated expiration: 2037-08-29
Also published as: CN107454523A

Abstract

The invention relates to the field of acoustics and discloses a sounding device. The sound production device comprises a vibration system, a magnetic circuit system and a basin frame for fixing the magnetic circuit system, wherein the vibration system comprises a sound film and a voice coil for driving the sound film to vibrate and produce sound, the sound production device also comprises a frame body which is sleeved and fixed on the outer side of the basin frame and made of metal materials, the frame body comprises an inner side wall attached to the outer side of the basin frame, an outer side wall arranged opposite to the inner side wall, a top end for connecting the inner side wall and the outer side wall and a bottom end connected with the inner side wall and the outer side wall and arranged opposite to the top end, and the sound film is fixed at the top end of the frame body. The sound production device provided by the invention can reduce the gluing area of the sound film and the basin frame, reserve a larger sound film vibration area and effectively improve the sound quality of the sound production device.

Description

Sound production device

Technical Field

The invention relates to the field of acoustics, in particular to a sounding device.

Background

The telephone receiver and the loudspeaker are small and light, so that the telephone receiver and the loudspeaker are widely applied to the fields of mobile phones, notebooks, telephones, tablet computers, automobiles and the like. These devices are now not only interested in their miniaturization and versatility, but are also required to have high quality, distortion-free speech effects. The sound film is used as a core component of all sound production devices, and the structural design of the sound film directly influences the performance of the sound production devices.

In the prior art, the sound film is fixed on the basin frame through viscose glue, and the basin frame is generally made of plastic materials. However, because the rigidity of the plastic material is insufficient, the frame needs to have a large enough thickness to ensure the structural strength, accordingly, the bonding surface formed between the sound film and the frame is also large, however, the wide bonding surface occupies a considerable area of the sound film, and the area of the bonding surface cannot be used for sound film vibration, so that the sound quality of the sound production device is greatly limited.

Disclosure of Invention

The invention aims to provide a sound production device, which can reduce the gluing area of a sound film and a basin frame, reserve a larger sound film vibration area and effectively improve the tone quality of the sound production device.

In order to solve the technical problem, an embodiment of the present invention provides a sound-generating device, including a vibration system, a magnetic circuit system, and a frame for fixing the magnetic circuit system, where the vibration system includes a sound film and a voice coil for driving the sound film to vibrate and generate sound, the sound-generating device further includes a frame body made of a metal material and fixed on the outer side of the frame, the frame body includes an inner side wall attached to the outer side of the frame, an outer side wall arranged opposite to the inner side wall, a top end connecting the inner side wall and the outer side wall, and a bottom end connecting the inner side wall and the outer side wall and arranged opposite to the top end, and the sound film is fixed on the top end of the frame body.

Compared with the prior art, the sound production device has the advantages that the sound membrane is fixed through the frame body, the sound membrane is fixed at the top end of the frame body, the frame body is made of metal materials, so that the frame body can be thin, the contact surface between the top end of the frame body and the sound membrane can be narrow, the contact area between the sound membrane and the top end of the frame body is reduced, a larger sound membrane vibration area is reserved, and the sound quality of the sound production device can be effectively improved.

In addition, the basin frame is provided with a bulge arranged below the frame body, and the bottom end of the frame body is abutted against the bulge.

In addition, the framework is equipped with certainly the recess that the bottom is sunken to the top direction, the recess is equipped with the tank bottom, the arch accept in the recess and with the tank bottom butt.

In addition, the sound membrane includes the vibration portion and encircles the fixed part that the vibration portion set up, the fixed part includes certainly laminating that the vibration portion extends is fixed in first fixed part on the top and certainly laminating that the first fixed part is buckled and is extended is fixed in second fixed part on the lateral wall, can effectual increase like this the sound membrane with the area of contact of framework makes the sound membrane can more firmly be fixed in on the framework.

In addition, the basin frame is provided with a bending part protruding towards the sound membrane, the bending part extends to the upper part of the bottom end and abuts against the inner side wall, and the joint of the bending part and the inner side wall is glued and fixed with the frame body and the basin frame.

In addition, the distance from the bending part to the sound film is larger than the displacement of the sound film vibrating towards the bending part.

In addition, the frame body is made of stainless steel, the strength of the stainless steel is high, and narrow design requirements for gluing the sound film and the frame body can be met.

In addition, the basin stand is a metal basin stand.

In addition, magnetic circuit including be fixed in the inboard magnetic frame of basin frame with set up in magnet steel in the magnetic frame, the magnetic frame include the diapire and certainly the diapire to the lateral wall that the sound membrane direction is buckled and is extended, the basin frame be equipped with protruding to the locating piece of lateral wall, the lateral wall be equipped with the breach of locating piece block.

Drawings

FIG. 1 is a perspective view of a sound device provided by the present invention;

FIG. 2 is a cross-sectional view of the sound device provided by the present invention;

FIG. 3 is an exploded perspective view of the sound device provided by the present invention;

FIG. 4 is an assembly view of the sound diaphragm, the frame and the frame of the sound-producing device provided by the present invention;

fig. 5 is an assembly diagram of the magnetic circuit system and the basin frame of the sounder device provided by the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present invention in its various embodiments. However, the technical solution claimed in the present invention can be implemented without these technical details and various changes and modifications based on the following embodiments.

As shown in fig. 1 to 5, the sound generating device 100 provided by the invention includes a vibration system 1, a magnetic circuit system 2, a frame 3 and a frame 4, wherein the vibration system 1 includes a sound diaphragm 11 and a voice coil 12, the frame 4 is fixed on the outer side of the frame 3 in a sleeving manner and is made of a metal material, the frame 4 includes an inner side wall 41 attached to the outer side of the frame 3, an outer side wall 42 opposite to the inner side wall 41, a top end 43 connecting the inner side wall 41 and the outer side wall 42, and a bottom end 44 connecting the inner side wall 41 and the outer side wall 42 and opposite to the top end 43, and the sound diaphragm 11 is fixed on the top end 43.

The frame 3 includes a protrusion 31 located below the frame 4, and a bottom end 44 of the frame 4 abuts against the protrusion 31, so that the position between the frame 4 and the frame 3 can be positioned.

Preferably, the frame body 4 is provided with a groove 45 which is recessed from the bottom end 44 to the top end 43, the groove 45 is provided with a groove bottom 451, and the protrusion 31 is accommodated in the groove 45 and is abutted against the groove bottom 451, so that the positioning fit between the frame body 4 and the basin stand 3 is optimized and more convenient.

Magnetic circuit 2 includes magnetic frame 21 and magnet steel 22, magnetic frame 21 is fixed in the inboard of basin frame 3, magnet steel 22 set up in the magnetic frame 21, magnetic frame 21 include diapire 211 and certainly diapire 211 to 11 direction bending extension's of sound membrane lateral wall 212, basin frame 3 be equipped with protruding to the locating piece 32 of lateral wall 212, lateral wall 212 be equipped with the breach 212a of locating piece 32 block, through locating piece 32 with the block cooperation of breach 212a is guaranteed magnetic frame 21 with positional stability between the basin frame 3.

The diaphragm 11 includes a vibrating portion 111 and a fixing portion 112, and the fixing portion 112 surrounds the vibrating portion 111. The fixing portion 112 includes a first fixing portion 112a and a second fixing portion 112b, the first fixing portion 112a extends from the vibrating portion 111 and is attached to the top end 43, and the second fixing portion 112b extends from the first fixing portion 112a and is attached to the outer sidewall 42. The second fixing portion 112b is attached to the outer wall surface 42 and covers a predetermined area, so that the contact area between the sound diaphragm 11 and the frame 4 can be effectively increased, and the fixing strength of the sound diaphragm 11 to the frame 4 can be improved.

The basin frame 3 is further provided with a bending part 33 protruding towards the sound film 11, the bending part 33 extends to the upper part of the bottom 44 and abuts against the inner side wall 41, and glue is applied to the joint of the bending part 33 and the inner side wall 41 to fix the frame body 4 and the basin frame 3. Because the frame body 4 is thin, the arrangement of the bending part 33 can improve the fixing strength of the frame body 4 on the basin frame 3, the inner side surface 41 is glued and fixed with the joint of the bending part 33, so that the bending part 33 supports the inner side surface 41, and the frame body 4 with a thin thickness cannot deform under the action of external force.

Specifically, the distance from the bending portion 33 to the sound diaphragm 11 is greater than the vibration displacement of the sound diaphragm 11 in the direction of the bending portion 33 in the vibration process, so that the sound diaphragm 11 is not limited by the contact with the bending portion 33 during operation, and the sound quality effect of the sound generating device 100 is not affected.

Preferably, the basin stand 3 is a metal basin stand. The basin frame 3 is mainly used for supporting the sounding device 100, and the metal material can enable the basin frame 3 to have stronger mechanical strength, so that the overall stability of the sounding device 100 is improved.

Preferably, the frame 4 is a stainless steel frame, which has high strength and can meet the design requirement of narrowing the bonding surface between the sound diaphragm 11 and the frame 4.

Compared with the prior art, the sound production device 100 fixes the sound membrane 11 through the frame body 4, the sound membrane 11 is fixed on the top end 43 of the frame body 4, and the frame body 4 is made of a metal material and has high strength, so that the thickness of the frame body 4 can be thinner, the contact area between the top end 43 of the frame body 4 and the sound membrane 11 is reduced, a larger vibration range of the sound membrane 11 is reserved, and the sound quality of the sound production device 100 can be effectively improved.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.

Claims

1. A sound production device comprises a vibration system, a magnetic circuit system and a basin frame for fixing the magnetic circuit system, wherein the vibration system comprises a sound film and a voice coil for driving the sound film to vibrate and produce sound; the sound membrane includes vibration portion and encircles the fixed part that vibration portion set up, the fixed part include certainly laminating that the vibration portion extends is fixed in first fixed part on the top and certainly laminating that first fixed part is buckled and is extended is fixed in second fixed part on the lateral wall.

2. The sound production device as claimed in claim 1, wherein the basin stand is provided with a protrusion disposed below the frame body, and the bottom end of the frame body abuts against the protrusion.

3. The sound production device as claimed in claim 2, wherein the frame has a recess recessed from the bottom end toward the top end, the recess having a bottom, the protrusion being received in the recess and abutting the bottom.

4. The sound production device according to claim 1, wherein the frame is provided with a bent portion protruding toward the sound diaphragm, the bent portion extends above the bottom end and abuts against the inner side wall, and the frame body and the frame are fixed by gluing at the joint of the bent portion and the inner side wall.

5. The sound production device according to claim 4, wherein the distance from the bending portion to the diaphragm is larger than the displacement of the diaphragm to vibrate in the direction of the bending portion.

6. The sounder device according to claim 1, wherein the frame is a stainless steel frame.

7. The sounder device according to claim 1, wherein the frame is a metal frame.

8. The sound production device according to claim 1, wherein the magnetic circuit system comprises a magnetic frame fixed on the inner side of the basin frame and magnetic steel arranged in the magnetic frame, the magnetic frame comprises a bottom wall and a side wall bent and extended from the bottom wall to the sound film direction, the basin frame is provided with a positioning block protruding towards the side wall, and the side wall is provided with a notch clamped with the positioning block.