CN212812022U

CN212812022U - Sound production device

Info

Publication number: CN212812022U
Application number: CN202021322660.9U
Authority: CN
Inventors: 曹成铭; 王磊; 张凡
Original assignee: AAC Technologies Pte Ltd
Current assignee: AAC Technologies Pte Ltd
Priority date: 2020-07-06
Filing date: 2020-07-06
Publication date: 2021-03-26
Anticipated expiration: 2030-07-06
Also published as: WO2022007164A1

Abstract

The utility model discloses a sounding device, which comprises a vibration system and a magnetic circuit system which is provided with a magnetic gap and drives the vibration system to vibrate, wherein the vibration system comprises a vibrating diaphragm for vibrating and sounding, a voice coil which is inserted into the magnetic gap and drives the vibrating diaphragm to vibrate and sounding, and a framework which is connected with the vibrating diaphragm and the voice coil, the vibrating diaphragm comprises a vibration part, a folded ring part which is bent and extended outwards from the periphery of the vibration part, and a fixed part which is bent and extended from one side of the folded ring part far away from the vibration part; the framework comprises a body part fixedly attached to one side, close to the magnetic circuit system, of the vibrating part and an extension part which is bent and extended from the periphery of the body part to the direction far away from the vibrating diaphragm, the body part is in a flat plate shape and is used as a dome structure, and the extension part is connected with the voice coil and suspends the voice coil in the magnetic gap. Compared with the prior art, the utility model discloses a sounder's assembly process is simple, and is with low costs, and acoustic performance is more excellent.

Description

Sound production device

[ technical field ] A method for producing a semiconductor device

The utility model relates to an acoustoelectric field especially relates to a sounding device.

[ 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. At present, the functions of mobile phones are very diverse, one of them is a high-quality music function, and therefore, a sound generating device for playing sound is widely applied to the current smart mobile devices.

The sound production device of the related art includes the basin frame, supports respectively and is fixed in the vibration system and the magnetic circuit of basin frame, vibration system establishes including the vibrating diaphragm that is fixed in the basin frame, the voice coil loudspeaker voice coil of drive vibrating diaphragm sound production, subsides and is fixed in the ball top of vibrating diaphragm and connection ball top with the skeleton of voice coil loudspeaker voice coil.

However, in the sound device of the related art, one side of the top dome is fixed to the diaphragm in an attaching manner, and the other side of the top dome is fixed to the framework in an adhering manner, so that the structure excessively occupies the internal space of the sound device, and the assembly process is complicated.

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

[ Utility model ] content

An object of the utility model is to provide a with low costs, sound production device that assembly process is simple.

In order to achieve the above object, the present invention provides a sound generating device, which includes a vibration system and a magnetic circuit system having a magnetic gap and driving the vibration system to vibrate, wherein the vibration system includes a vibrating diaphragm for generating sound by vibration, a voice coil inserted into the magnetic gap to drive the vibrating diaphragm to generate sound by vibration, and a framework connecting the vibrating diaphragm and the voice coil, the vibrating diaphragm includes a vibrating portion, a folded ring portion extending by bending the periphery of the vibrating portion outwards, and a fixing portion extending by bending a side of the folded ring portion away from the vibrating portion; the framework comprises a body part fixedly attached to one side, close to the magnetic circuit system, of the vibrating part and an extension part which is bent and extended from the periphery of the body part to the direction far away from the vibrating diaphragm, the body part is in a flat plate shape and is used as a dome structure, and the extension part is connected with the voice coil and suspends the voice coil in the magnetic gap.

Preferably, the extension portion includes a first extension portion that is bent and extended from a periphery of the main body portion in a direction away from the diaphragm and abuts against one side of the voice coil that is close to the diaphragm, and a second extension portion that is bent and extended from opposite sides of the first extension portion in a direction away from the diaphragm along a peripheral side of the voice coil, and the second extension portion is attached to an outer peripheral side of the voice coil.

Preferably, the body part falls into the range of the corrugated ring part towards the orthographic projection part of the diaphragm along the vibration direction of the diaphragm.

Preferably, the main body is rectangular, and the second extending portion is formed by extending two opposite sides of a short axis of the first extending portion.

Preferably, the sounding device includes the basin frame, the fixed part is fixed in the basin frame, the sounding device is still located including the lid the basin frame is close to the protecgulum of vibrating diaphragm one side, the protecgulum with the vibrating diaphragm encloses into the sound production ante-chamber jointly, the protecgulum is equipped with the phonation hole that runs through it, the phonation hole will sound production ante-chamber and external intercommunication.

Preferably, the front cover comprises a front cover body and a bending part, the front cover body is arranged at an interval relative to the vibrating diaphragm, the bending part is bent and extended towards the vibrating diaphragm from the periphery of the front cover body and is pressed on one side, far away from the basin stand, of the fixing part, and the sound emitting hole penetrates through the front cover body.

Preferably, the vibration system further comprises an elastic part which is arranged at an interval relative to the vibrating diaphragm and fixed on the basin frame, and the elastic part comprises a first section which is fixed on one side of the vibrating diaphragm and is far away from the basin frame, a second section which is connected with the voice coil and an elastic arm which is connected with the first section and the second section.

Preferably, the elastic part comprises two elastic parts which are respectively opposite to the two second extending parts and are arranged at intervals.

Preferably, the magnetic circuit system comprises a magnetic yoke, a flange bent and extended from the periphery of the magnetic yoke and fixed to the basin stand, a magnetic steel fixed to the magnetic yoke, and a pole core stacked on the magnetic steel, wherein the magnetic steel and the flange form the magnetic gap at intervals.

Preferably, the pole piece comprises a main body part fixed on the magnetic steel in an attached mode and an avoidance space formed by the main body part far away from the periphery of one side of the magnetic steel in a concave mode.

Compared with the prior art, the framework comprises a body part which is fixedly attached to one side of the vibrating part close to the magnetic circuit system and an extension part which is bent and extended from the periphery of the body part to the direction far away from the vibrating diaphragm, the body part is in a flat plate shape and is used as a ball top structure, and the extension part is connected with the voice coil and suspends the voice coil in the magnetic gap. The structure is arranged, so that the sound production device does not need to be additionally provided with a ball top to strengthen the vibration effect of the vibrating diaphragm, but directly uses the body part of the framework to serve as a ball top structure, the internal space of the sound production device is saved, the assembly process that the ball top is respectively connected with the vibrating diaphragm and the framework in the related technology is omitted, the assembly efficiency of the sound production device is improved, and the production cost is reduced. On the other hand, the flat-plate-shaped body part serves as a dome structure, so that the contact area between the body part and the vibration part is increased, the fixing effect of the vibrating diaphragm is further enhanced, and the acoustic performance of the sound production device is improved.

[ description of the drawings ]

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

fig. 1 is a schematic perspective view of the sound device of 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 cross-sectional view taken along line A-A of FIG. 1;

fig. 4 is a cross-sectional view of another embodiment of fig. 3.

[ detailed description ] embodiments

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a sound generating device 100, which includes a frame 1, a vibration system 2 supported on the frame 1, and a magnetic circuit system 3 for driving the vibration system 2 to vibrate and generate sound, wherein the magnetic circuit system 3 has a magnetic gap 30.

The vibration system 2 comprises a diaphragm 21 for vibrating and sounding, a voice coil 22 inserted in the magnetic gap 30 to drive the diaphragm 21 to vibrate and sound, and a framework 23 connecting the diaphragm 21 and the voice coil 22.

The vibrating diaphragm 21 includes a vibrating portion 211, a bending portion 212 extending from the periphery of the vibrating portion 211 to the outside, and a fixing portion 213 extending from the bending portion 212 to a side away from the vibrating portion 211 and fixed to the frame 1.

In this embodiment, the bobbin 23 includes a main body 231 attached and fixed to the vibrating portion 211 on a side close to the magnetic circuit system 3, and an extending portion 232 bent and extending from a peripheral edge of the main body 231 in a direction away from the diaphragm 21, the main body 231 has a flat plate shape to serve as a dome structure, and the extending portion 232 is connected to the voice coil 22 and suspends the voice coil 22 in the magnetic gap 30. Due to the arrangement of the structure, the sound production device 100 does not need to additionally arrange a ball top to enhance the vibration effect of the vibrating diaphragm, but directly uses the body part 231 of the framework 23 as a ball top structure, so that the internal space of the sound production device 100 is saved, an assembly process that the ball top is respectively connected with the vibrating diaphragm and the framework in the related technology is omitted, the assembly efficiency of the sound production device is improved, and the production cost is reduced. On the other hand, the body 231 in the shape of a flat plate acts as a dome, so that the contact area between the body 231 and the vibrating portion 211 is increased, the fixing effect of the diaphragm 21 is further enhanced, and the acoustic performance of the sound generating device 100 is improved.

Specifically, the extension 232 includes a first extension 2321 bent and extended from the periphery of the body 231 in a direction away from the diaphragm 21 and abutted against one side of the voice coil 22 close to the diaphragm 21, and a second extension 2322 bent and extended from two opposite sides of the first extension 2321 in a direction away from the diaphragm 21 along the outer peripheral side of the voice coil 22, and the second extension 2322 is attached to the outer peripheral side of the voice coil 22, so that the fixing strength of the bobbin 23 and the voice coil 22 is further enhanced by the structure, and the reliability of the sound generating device 100 is improved. In addition, the second extension 2322 can serve as a limiting structure to limit the voice coil 22, so as to improve the assembly efficiency of the sound generating device 100.

In this embodiment, the body 231 is rectangular, and the second extending portion 2322 is formed by extending two opposite sides of the short axis of the first extending portion 2321.

The vibration system 2 further comprises an elastic member 24 which is arranged opposite to the vibrating diaphragm 21 at an interval and fixed on the frame 1, wherein the elastic member 24 comprises a first section 241 which is fixed on one side of the frame 1 far away from the vibrating diaphragm 21, a second section 242 which is connected with the voice coil 22, and an elastic arm 243 which is connected with the first section 241 and the second section 242.

In the present embodiment, the elastic member 24 is a flexible printed circuit board, and the voice coil 22 is electrically connected to the elastic member 24. On one hand, the voice coil 22 is supported, and on the other hand, external electric signals are introduced into the voice coil 22, so that the problem that the wires are easily broken when the external electric signals are introduced into the voice coil 22 through a lead is solved, and the reliability of the voice coil is improved. In addition, the elastic member 24 includes two elastic members respectively facing and spaced from the two second extending portions 2322, so that the supporting effect of the structure of the dual elastic members on the voice coil 22 is more stable, and the structure inhibits the lateral swing of the voice coil 22.

The magnetic circuit system 3 comprises a magnetic yoke 31, a flange 32 which is bent and extended from the periphery of the magnetic yoke 31 and fixed on the basin stand 1, a magnetic steel 33 fixed on the magnetic yoke 31, and a pole core 34 stacked on the magnetic steel 33, wherein the magnetic steel 33 and the flange 32 form the magnetic gap 30 at intervals.

Preferably, in the present embodiment, the pole piece 34 includes a main body portion 341 attached to and fixed to the magnetic steel 33, and a relief space 342 formed by a peripheral edge of the main body portion 341 on a side away from the magnetic steel 33 being recessed. The arrangement of the structure further increases the internal space of the sounding device 100, so that the sounding device 100 has better acoustic performance.

The sounding device 100 further comprises a front cover 4 covering the basin frame 1 and close to one side of the vibrating diaphragm 21, the front cover 4 and the vibrating diaphragm 21 jointly enclose a sounding front cavity 40, the front cover 4 is provided with a sounding hole 41 penetrating through the front cover 4, and the sounding hole 41 is used for communicating the sounding front cavity 40 with the outside

Further, the front cover 4 includes a front cover body 42 opposite to the diaphragm 21 and a bending portion 43 extending from the periphery of the front cover body 42 to the diaphragm 21 and pressing the fixing portion 213 away from the basin stand 1.

It should be noted that the sound emitting holes 41 are disposed at different positions to realize different directional sound emitting structures, for example, the sound emitting holes penetrate through the front cover body 42 to form a front sound emitting structure. Of course, the sound hole 41 may be disposed through the bent portion 43 to form a side sound emitting structure, so that the sound hole is convenient for use when the front sound is blocked, and is more flexible in use.

Referring to fig. 4, fig. 4 is a cross-sectional view of another embodiment of fig. 3. In another embodiment, a sound device is provided which differs from the embodiment shown in fig. 3 in that the skeleton structure is different.

The framework includes a main body 231a attached and fixed to the vibrating portion 211a on a side close to the magnetic circuit system 3a, and an extending portion 232a bent and extended from a peripheral edge of the main body 231a in a direction away from the diaphragm 21 a. The main body 231a falls within the range of the bending ring part 212a toward the orthographic projection part of the diaphragm 21a along the vibration direction of the diaphragm 21 a. This structure allows the outer diameter of the voice coil 22a to be larger than the inner diameter of the vibrating portion 211a, so that a larger magnetic circuit can be disposed inside the voice coil 22a, that is, the main magnetic steel 33a with a larger size can be disposed inside the voice coil 22a, and the magnetic circuit of the magnetic circuit system 3a can be maximized, so that the magnetic force lines of the magnetic circuit system 3a are stronger and the driving force is stronger, thereby the acoustic performance of the sound generating device is excellent.

Compared with the prior art, the utility model discloses an in the sounder, the skeleton is fixed in including pasting the vibration portion is close to the this somatic part of magnetic circuit one side and by the periphery of this somatic part is to keeping away from the extension that the vibrating diaphragm direction was buckled and is extended, this somatic part is flat-plate-shaped and is used for acting as the dome structure, the extension with the voice coil loudspeaker voice coil is connected and will the voice coil loudspeaker voice coil suspend in the magnetic gap. The structure is arranged, so that the sound production device does not need to be additionally provided with a ball top to strengthen the vibration effect of the vibrating diaphragm, but directly uses the body part of the framework to serve as a ball top structure, the internal space of the sound production device is saved, the assembly process that the ball top is respectively connected with the vibrating diaphragm and the framework in the related technology is omitted, the assembly efficiency of the sound production device is improved, and the production cost is reduced. On the other hand, the flat-plate-shaped body part serves as a dome structure, so that the contact area between the body part and the vibration part is increased, the fixing effect of the vibrating diaphragm is further enhanced, and the acoustic performance of the sound production device is improved.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.

Claims

1. A sound production device comprises a vibration system and a magnetic circuit system which is provided with a magnetic gap and drives the vibration system to vibrate, wherein the vibration system comprises a vibrating diaphragm for vibrating and producing sound, a voice coil which is inserted into the magnetic gap to drive the vibrating diaphragm to vibrate and produce sound and a framework which connects the vibrating diaphragm and the voice coil, and the vibrating diaphragm comprises a vibration part, a folded ring part which is bent and extended outwards from the periphery of the vibration part and a fixed part which is bent and extended from one side of the folded ring part, which is far away from the vibration part; the voice coil loudspeaker is characterized in that the framework comprises a body part fixedly attached to one side of the vibration part close to the magnetic circuit system and an extension part which is bent and extended from the periphery of the body part to the direction far away from the vibrating diaphragm, the body part is in a flat plate shape and is used as a ball top structure, and the extension part is connected with the voice coil and suspends the voice coil in the magnetic gap.

2. The sounding device according to claim 1, wherein the extending portion comprises a first extending portion extending from a periphery of the body portion in a direction away from the diaphragm and bending and abutting against one side of the voice coil close to the diaphragm, and a second extending portion extending from two opposite sides of the first extending portion in a direction away from the diaphragm along a peripheral side of the voice coil, and the second extending portion abuts against an outer peripheral side of the voice coil.

3. The sounding device according to claim 2, wherein the body portion falls within the range of the corrugated portion toward the orthographic projection portion of the diaphragm along the vibration direction of the diaphragm.

4. The sounder device according to claim 2, wherein the body portion is rectangular and the second extension is formed by extending opposite sides of a minor axis of the first extension.

5. The sound production device according to claim 4, wherein the sound production device comprises a basin frame, the fixing portion is fixed on the basin frame, the sound production device further comprises a front cover which is covered on one side of the basin frame close to the vibrating diaphragm, the front cover and the vibrating diaphragm jointly enclose a sound production front cavity, the front cover is provided with a sound production hole which penetrates through the front cover, and the sound production front cavity is communicated with the outside through the sound production hole.

6. The sounding device according to claim 5, wherein the front cover includes a front cover body spaced opposite to the diaphragm, and a bending portion extending from a periphery of the front cover body to the diaphragm and pressing against a side of the fixing portion away from the frame, and the sounding hole is disposed through the front cover body.

7. The sounding device according to claim 5, wherein the vibration system further comprises an elastic member spaced from the diaphragm and fixed to the frame, and the elastic member comprises a first section fixed to a side of the frame away from the diaphragm, a second section connected to the voice coil, and a resilient arm connecting the first section and the second section.

8. The sounder device according to claim 7, wherein the resilient member comprises two and is spaced from and directly opposite the two second extensions.

9. The sounding device according to claim 8, wherein the magnetic circuit system comprises a magnetic yoke, a flange bent and extended from a periphery of the magnetic yoke and fixed to the frame, a magnetic steel fixed to the magnetic yoke, and a pole core stacked on the magnetic steel, and the magnetic steel and the flange are spaced to form the magnetic gap.

10. The sound production device according to claim 9, wherein the pole piece comprises a main body portion attached to the magnetic steel and an avoiding space formed by a peripheral edge of one side of the main body portion away from the magnetic steel.