CN111131979A

CN111131979A - Sound production device

Info

Publication number: CN111131979A
Application number: CN201911286249.2A
Authority: CN
Inventors: 宋威; 邵涛; 陶伟伟
Original assignee: AAC Technologies Pte Ltd
Current assignee: AAC Technologies Pte Ltd
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-05-08
Anticipated expiration: 2039-12-13
Also published as: CN111131979B

Abstract

The invention provides a sounding device, which comprises a basin frame, a vibration system and a magnetic circuit system, wherein the vibration system is respectively fixed on the basin frame; the vibration system comprises a vibrating diaphragm, a framework, a voice coil and an elastic supporting component; the vibrating diaphragm is fixed on one side of the basin frame far away from the magnetic circuit system; the framework comprises a framework body fixed on the vibrating diaphragm, at least two first connecting arms respectively arranged on the outer side of the framework body and spaced from the framework body, a second connecting arm for connecting the framework body and the first connecting arms, and reinforcing ribs, wherein the at least two first connecting arms are arranged at intervals, and the reinforcing ribs are arranged at intervals from the framework body and connected with two adjacent first connecting arms; the voice coil is connected to one side of the framework body, which is far away from the vibrating diaphragm, and is inserted into the magnetic gap; the elastic supporting component is fixed on one side, away from the vibrating diaphragm, of the basin frame, and the elastic supporting component is connected to one side, away from the vibrating diaphragm, of the first connecting arm. Compared with the related art, the sound production device has high reliability.

Description

Sound production device

[ technical field ] A method for producing a semiconductor device

The invention relates to the field of electroacoustic transduction, in particular to a sounding device applied to a portable electronic product.

[ background of the invention ]

With the advent of the mobile internet age, the number of smart mobile devices is increasing. Among the mobile devices, the mobile phone is undoubtedly the most common and portable mobile terminal device. A sound generating device for playing sound is widely applied to smart mobile devices such as current mobile phones.

The sound production device in the related art comprises a basin frame, a vibration system and a magnetic circuit system, wherein the vibration system and the magnetic circuit system are respectively fixed on the basin frame; the vibration system comprises a vibration diaphragm and an elastic supporting component which are respectively fixed on two opposite sides of the basin frame, a voice coil and a framework which are used for driving the vibration diaphragm to vibrate, the framework comprises a framework body connected with the voice coil and the vibration diaphragm and a plurality of connecting arms which are respectively fixed on the framework body and connected with the auxiliary vibration diaphragm of the auxiliary vibration diaphragm, and the connecting arms are arranged at intervals. In order to ensure the vibration sensitivity of the vibration system and avoid the bad influence on the vibration sensitivity caused by too large mass of the framework, the framework is generally made of thinner materials.

However, in the related art, since the frame has a small thickness and low rigidity and strength, the frame is easily deformed during the assembly process and the vibration process, so that the reliability of the vibration system is low.

Therefore, there is a need to provide a new sound generation device to solve the above technical problems.

[ summary of the invention ]

The invention aims to provide a sound production device with high reliability.

In order to achieve the above object, the present invention provides a sound production device, which comprises a basin frame, a vibration system respectively fixed on the basin frame, and a magnetic circuit system for driving the vibration system to vibrate and produce sound, wherein the magnetic circuit system has a magnetic gap; the vibration system includes:

the vibrating diaphragm is fixed on one side of the basin frame, which is far away from the magnetic circuit system;

the framework comprises a framework body fixed on one side of the vibrating diaphragm close to the magnetic circuit system, at least two first connecting arms respectively arranged on the outer side of the framework body and spaced from the framework body, a second connecting arm connecting the framework body and the first connecting arms, and reinforcing ribs, wherein the at least two first connecting arms are arranged at intervals, and the reinforcing ribs are arranged at intervals from the framework body and are connected with two adjacent first connecting arms;

the voice coil is connected to one side, far away from the vibrating diaphragm, of the framework body, inserted into the magnetic gap and used for driving the vibrating diaphragm to vibrate and sound through the framework body; and the number of the first and second groups,

the elastic supporting component is fixed on the basin frame and is far away from one side of the vibrating diaphragm, and the elastic supporting component is connected with the first connecting arm and is far away from one side of the vibrating diaphragm.

Preferably, the first connecting arm is close to one end of the vibrating diaphragm and is attached to the vibrating diaphragm, and the reinforcing rib is close to one end of the vibrating diaphragm and is attached to the vibrating diaphragm.

Preferably, the elastic support components comprise two elastic support components which are arranged on two opposite sides of the framework body at intervals; the first connecting arms are divided into two groups, the two groups of first connecting arms are respectively fixed on two opposite sides of the framework body and are respectively opposite to the two elastic supporting assemblies, the two first connecting arms of one group are respectively connected with one of the elastic supporting assemblies, and the two first connecting arms of the other group are respectively connected with the other elastic supporting assembly; the reinforcing ribs comprise two reinforcing ribs, and each reinforcing rib is used for connecting two first connecting arms in the same group.

Preferably, the framework body is of a rectangular structure with round corners, and the four first connecting arms are connected to the positions of the four round corners of the framework body through the second connecting arms respectively; the two reinforcing ribs are arranged on two opposite sides of the short shaft of the framework body at intervals, and the two elastic supporting assemblies are arranged on two opposite sides of the short shaft of the framework body at intervals.

Preferably, each elastic support component comprises an elastic part fixed on one side of the basin frame far away from the vibrating diaphragm and an auxiliary vibrating diaphragm attached to one side of the elastic part far away from the vibrating diaphragm, and one side of the first connecting arm far away from the vibrating diaphragm is fixedly connected to one side of the elastic part close to the vibrating diaphragm.

Preferably, the elastic part comprises a first fixing arm fixed on the basin frame, a second fixing arm respectively connected to two adjacent first connecting arms, and two elastic arms respectively connected with the first fixing arm and the second fixing arm; supplementary vibrating diaphragm include the cross section personally submit the arc structure roll over the ring portion and by first connecting portion and the second connecting portion that the relative both sides of rolling over the ring portion extended respectively, first connecting portion are fixed in first fixed arm is kept away from vibrating diaphragm one side, the second connecting portion are fixed in the second fixed arm is kept away from vibrating diaphragm one side, and make roll over ring portion and two the bullet arm sets up relatively.

Preferably, the first connecting arm includes a first section connected to the second connecting arm and a second section bent and extended from the first section along the vibration direction of the diaphragm toward the direction close to the elastic support component, and one end of the second section, which is far away from the diaphragm, is connected to the elastic support component.

Preferably, the magnetic circuit system comprises a magnetic bowl fixed on one side of the basin frame far away from the vibrating diaphragm and main magnetic steel fixed in the magnetic bowl, and the magnetic bowl and the main magnetic steel form the magnetic gap at an interval.

Preferably, the magnetic bowl includes a bottom wall disposed opposite to the diaphragm at an interval and an extension wall bent and extended from the periphery of the bottom wall toward a direction close to the diaphragm, and the main magnetic steel is fixed to the bottom wall and forms the magnetic gap at an interval with the extension wall.

Preferably, the framework body is provided with a plurality of through holes penetrating through the framework body along the direction perpendicular to the vibration direction, and the through holes are arranged at equal intervals.

Compared with the prior art, the sounding device comprises a framework body, at least two first connecting arms, a second connecting arm and a reinforcing rib, wherein the framework body is fixed on one side, close to the magnetic circuit system, of the vibrating diaphragm; in the structure, through the arrangement of the reinforcing ribs, the rigidity and the strength between two adjacent first connecting arms can be effectively improved, the framework is prevented from deforming in the assembling process and the vibrating process, the reliability of the vibrating system is improved, and the high reliability of the sounding device is ensured.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:

FIG. 1 is a schematic perspective view of a sound device according to the present invention;

FIG. 2 is an exploded view of a part of the three-dimensional structure of the sound device of the present invention;

FIG. 3 is a schematic view of the assembly of the voice coil, the bobbin and the elastic support assembly of the sound device of the present invention;

FIG. 4 is an exploded view of the three-dimensional structure of FIG. 3;

FIG. 5 is a cross-sectional view taken along line A-A of FIG. 1;

fig. 6 is an enlarged view of a portion B shown in fig. 5.

[ detailed description ] embodiments

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, the present invention provides a sound production device 100, which includes a frame 1, a vibration system 2, and a magnetic circuit system 3 having a magnetic gap 30.

The basin stand 1 is annular and is used for supporting the vibration system 2 and the magnetic circuit system 3.

The vibration system 2 is fixed on the basin stand 1.

In the present embodiment, the vibration system 2 includes a diaphragm 21, a voice coil 22, an elastic support member 23, and a bobbin 24.

The vibrating diaphragm 21 is fixed on one side of the basin frame 1, which is far away from the magnetic circuit system 3, and is used for vibrating and sounding.

The frame 24 includes a frame body 241, at least two first connecting arms 242 spaced apart from each other, a second connecting arm 243, and a reinforcing rib 244.

The frame body 241 is fixed on one side of the diaphragm 21 close to the magnetic circuit system 3, at least two first connecting arms 242 are respectively disposed on the outer side of the frame body 241 and spaced from the frame body 241, each first connecting arm 242 is connected to the frame body 241 through one second connecting arm 243, and the reinforcing rib 244 is spaced from the frame body 241 and connected to two adjacent first connecting arms 242.

Further, each of the first connecting arms 242 includes a first section 2421 connected to the second connecting arm 243 and a second section 2422 connected to the first section 2421; the second section 2422 is formed by bending and extending the first section 2421 in a direction approaching the elastic support component 23 along the vibration direction of the diaphragm 21, and one end of the second section 2422 away from the diaphragm 21 is connected to the elastic support component 23.

Preferably, the position connection relationship between the first connecting arm and the reinforcing rib and the diaphragm is not limited, for example, in order to better improve the vibration reliability of the diaphragm 21, the first connecting arm 242 is close to one end of the diaphragm 21 and is attached to the diaphragm 21, that is, one end of the first section 2421 close to the diaphragm 21 is attached to the diaphragm 21, and one end of the reinforcing rib 244 close to the diaphragm 21 is attached to the diaphragm 21, which effectively increases the contact area between the framework 24 and the diaphragm 21, so that the framework 24 drives the diaphragm 21 to vibrate and generate sound with higher reliability. Of course, the position connection relationship between the second connection arm and the diaphragm is also not limited, for example, in this embodiment, the second connection arm 243 is fixed to the frame body 241 near one side of the diaphragm, and the second connection arm 243 near one side of the diaphragm 21, so as to further increase the contact area between the frame 24 and the diaphragm 21, and further improve the reliability of the vibration of the diaphragm 21.

The voice coil 22 is connected to one side of the framework body 241, which is far away from the diaphragm 21, and is inserted into the magnetic gap 30, so as to drive the diaphragm 21 to vibrate and sound through the framework body 241; further, the first connecting arm 242 is disposed outside the voice coil 22 and spaced apart from the voice coil 22.

Preferably, the skeleton body 241 is provided with a plurality of through holes 2410 penetrating through the skeleton body along a direction perpendicular to the vibration direction, the through holes 2410 are arranged at equal intervals, the inside and the outside of the skeleton body 241 are communicated with air through the arrangement of the through holes 2410, and the balance of air pressure between the inside and the outside of the skeleton body 241 is favorably kept in the vibration process, so that the reliability of vibration is better ensured; in addition, the arrangement can effectively reduce the internal stress of the framework body 241, effectively avoid the phenomenon that the framework body 241 is damaged due to overlarge internal stress in the vibration process, and ensure the reliability of the vibration system 2.

The elastic supporting component 23 is fixed on the side of the basin stand 1 far away from the diaphragm 21, and the elastic supporting component 23 is connected to the side of the first connecting arm 242 far away from the diaphragm 21.

The elastic support assembly 23 includes an elastic member 231 and an auxiliary diaphragm 232.

The elastic member 231 is fixed on the frame 1 at a side away from the diaphragm 21, and includes a first fixing arm 2311 fixed on the frame 1, a second fixing arm 2312 respectively connected with two adjacent first connecting arms 242, and two elastic arms 2313 respectively connected with the first fixing arm 2311 and the second fixing arm 2312.

The auxiliary diaphragm 232 is attached to one side of the elastic member 231, which is far away from the diaphragm 21, and includes a ring-folded portion 2321 with an arc-shaped cross section, and a first connection portion 2322 and a second connection portion 2323 respectively extending from two opposite sides of the ring-folded portion 2321, where the first connection portion 2322 is fixed to one side of the first fixing arm 2311, which is far away from the diaphragm 21, and the second connection portion 2323 is fixed to one side of the second fixing arm 2312, which is far away from the diaphragm 21, and the ring-folded portion 2321 is opposite to the two elastic arms 2313.

The side 242 of the first connecting arm away from the diaphragm is fixedly supported on the side of the elastic member 231 close to the diaphragm 21, and more specifically, the second section 2422 is fixedly supported on the second fixing arm 2312.

In the above structure, the reinforcing ribs 244 are arranged, so that the integrity of the two adjacent first connecting arms 242 can be effectively improved, the rigidity and the strength between the two adjacent first connecting arms 242 can be improved, the integral rigidity of the framework 24 can be effectively improved, the framework 24 is prevented from deforming in the assembling process and the vibrating process, the reliability of the vibrating system 2 is effectively improved, and the high reliability of the sound generating device 100 can be ensured.

It should be noted that, the number of the elastic supporting components and the first connecting arms are not limited, and the two elastic supporting components and the first connecting arms may be arranged according to the actual design requirement, and one elastic supporting component and one set of first connecting arms are arranged correspondingly, for example, in this embodiment, the elastic supporting components 23 include two and are arranged at two opposite sides of the frame body 241 at intervals, the first connecting arms 242 include four and are equally divided into two sets, two sets of the first connecting arms 242 are respectively fixed at two opposite sides of the frame body 241 and are respectively opposite to the two elastic supporting components 23, one set of the two first connecting arms 242 are respectively connected to one of the elastic supporting components 23, and the other set of the two first connecting arms 242 are respectively connected to the other elastic supporting components 23.

Further, the number of the reinforcing ribs is not limited, for example, in the present embodiment, the reinforcing ribs 244 include two reinforcing ribs, and each reinforcing rib 244 connects two first connecting arms 242 of the same group.

Preferably, the shape of the skeleton body 241 is not limited, and in the present embodiment, the skeleton body 241 has a rectangular structure with rounded corners, the first sections 2421 of the four first connecting arms 242 are respectively connected to the positions of the four rounded corners of the skeleton body 241 through the second connecting arms 243, the two reinforcing ribs 244 are disposed at two opposite sides of the short axis of the skeleton body 241 at intervals, and the two elastic supporting assemblies 23 are disposed at two opposite sides of the short axis of the skeleton body 241 at intervals; through the setting of strengthening rib 244, two adjacent fillets have effectively been improved physically, the structural strength of the fillet position of skeleton body 241 helps restraining the deformation of the fillet position of skeleton body 241, improves the bulk rigidity of skeleton 24, improves vibration system 2's reliability.

Of course, the two reinforcing ribs are respectively arranged at two opposite sides of the long shaft of the framework body at intervals, and it is also feasible that the two elastic supporting components are arranged at two opposite sides of the long shaft of the framework body at intervals.

The magnetic circuit system 3 comprises a magnetic bowl 31 and a main magnet steel 32.

The magnetic bowl 31 is fixed on one side of the basin frame 1 far away from the vibrating diaphragm 21; the main magnet steel 32 is fixed to the magnetic bowl 31 and encloses the magnetic gap 30 together with the magnetic bowl 31.

Further, the magnetic bowl 31 includes a bottom wall 311 disposed opposite to the diaphragm 21 at an interval, and an extension wall 312 bent and extended from the periphery of the bottom wall 311 in the direction approaching the diaphragm 21 along the vibration direction, and the main magnetic steel 32 is fixed to the bottom wall 311 and spaced from the extension wall 312 to form the magnetic gap 30.

Furthermore, the magnetic bowl 31 is rectangular, and the extending wall 312 includes two first walls 3121 bent and extended from two opposite sides of the short axis of the magnetic bowl 31, and two second walls 3122 bent and extended from two opposite sides of the long axis of the magnetic bowl 31; the magnetic bowl 31 is connected with the basin stand 1 through the two second walls 3122.

While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a sounder, its includes the basin frame, is fixed in respectively the vibration system of basin frame and drive the magnetic circuit of vibration system vibration sound production, magnetic circuit has the magnetic gap, its characterized in that, vibration system includes:

the framework comprises a framework body fixed on one side of the vibrating diaphragm close to the magnetic circuit system, at least two first connecting arms which are respectively arranged on the outer side of the framework body and are spaced from the framework body, a second connecting arm for connecting the framework body and the first connecting arms, and reinforcing ribs, wherein the at least two first connecting arms are arranged at intervals, and the reinforcing ribs are arranged at intervals from the framework body and are connected with two adjacent first connecting arms;

2. The sound production device of claim 1, wherein the first connecting arm is attached to the diaphragm at an end thereof close to the diaphragm, and the reinforcing rib is attached to the diaphragm at an end thereof close to the diaphragm.

3. The sounder device according to claim 2, wherein the resilient support assembly comprises two spaced apart resilient support members disposed on opposite sides of the skeletal body; the first connecting arms are divided into two groups, the two groups of first connecting arms are respectively fixed on two opposite sides of the framework body and are respectively opposite to the two elastic supporting assemblies, the two first connecting arms of one group are respectively connected with one of the elastic supporting assemblies, and the two first connecting arms of the other group are respectively connected with the other elastic supporting assembly; the reinforcing ribs comprise two reinforcing ribs, and each reinforcing rib is used for connecting two first connecting arms in the same group.

4. The sounding device according to claim 3, wherein the skeleton body is a rectangular structure with rounded corners, and the four first connecting arms are respectively connected to the positions of the four rounded corners of the skeleton body through the second connecting arms; the two reinforcing ribs are arranged on two opposite sides of the short shaft of the framework body at intervals, and the two elastic supporting assemblies are arranged on two opposite sides of the short shaft of the framework body at intervals.

5. The sound production device of claim 3, wherein each of the elastic support assemblies includes an elastic member fixed to a side of the frame away from the diaphragm and an auxiliary diaphragm attached to a side of the elastic member away from the diaphragm, and one end of the first connecting arm away from the diaphragm is fixedly connected to a side of the elastic member close to the diaphragm.

6. The sounder device according to claim 5, wherein the resilient member comprises a first fixed arm fixed to the frame, a second fixed arm connected to two adjacent first connecting arms, respectively, and two resilient arms connected to the first fixed arm and the second fixed arm, respectively; supplementary vibrating diaphragm include the cross section personally submit the arc structure roll over the ring portion and by first connecting portion and the second connecting portion that the relative both sides of rolling over the ring portion extended respectively, first connecting portion are fixed in first fixed arm is kept away from vibrating diaphragm one side, the second connecting portion are fixed in the second fixed arm is kept away from vibrating diaphragm one side, and make roll over ring portion and two the bullet arm sets up relatively.

7. The sounding device according to claims 1-6, wherein the first connecting arm comprises a first section connected to the second connecting arm and a second section extending from the first section and bending towards the elastic supporting component along the vibration direction of the diaphragm, and an end of the second section away from the diaphragm is connected to the elastic supporting component.

8. The sound production device as claimed in claim 1, wherein the magnetic circuit system comprises a magnetic bowl fixed on a side of the frame away from the diaphragm, and a main magnetic steel fixed in the magnetic bowl, and the magnetic bowl and the main magnetic steel are spaced to form the magnetic gap.

9. The sound production device as claimed in claim 8, wherein the magnetic bowl comprises a bottom wall spaced opposite to the diaphragm and an extension wall extending from the periphery of the bottom wall in a direction close to the diaphragm, and the main magnetic steel is fixed to the bottom wall and spaced from the extension wall to form the magnetic gap.

10. The sounding device according to claim 1, wherein the skeleton body is provided with a plurality of through holes extending through the skeleton body along a direction perpendicular to the vibration direction, and the through holes are arranged at equal intervals.