CN213028536U

CN213028536U - Sound production device

Info

Publication number: CN213028536U
Application number: CN202021344071.0U
Authority: CN
Inventors: 曹成铭; 王磊; 张凡
Original assignee: AAC Technologies Pte Ltd
Current assignee: AAC Technologies Pte Ltd
Priority date: 2020-07-09
Filing date: 2020-07-09
Publication date: 2021-04-20
Anticipated expiration: 2030-07-09
Also published as: WO2022007165A1

Abstract

The utility model provides 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; the vibration system comprises a vibrating diaphragm for vibrating and sounding, a voice coil and a framework, wherein the vibrating diaphragm is inserted into the magnetic gap to drive the vibrating diaphragm to vibrate and sound, the vibrating diaphragm comprises a vibration part, a folded ring part and a fixing part, the folded ring part extends outwards from the periphery of the vibration part, the fixing part extends towards the direction of the vibration part, the framework is attached to one side, close to the magnetic circuit system, of the vibration part, the framework is arranged along the vibration direction of the vibrating diaphragm, at least one part of the orthographic projection of the vibrating diaphragm falls into the folded ring part, the voice coil is fixed on the framework and is suspended in the magnetic gap through the framework, and at least part of the voice coil is opposite to the folded ring part. Compared with the prior art, the utility model discloses a but sound production device's magnetic circuit maximize and acoustic performance is excellent.

Description

Sound production device

[ technical field ] A method for producing a semiconductor device

The utility model relates to an electroacoustic conversion field especially relates to an apply to vocal device of electron audio amplifier 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. 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 a frame, and a vibration system and a magnetic circuit system having a magnetic gap, which are respectively fixed to the frame. Vibration system is including being fixed in the vibrating diaphragm of basin frame and being fixed in the vibrating diaphragm inserts and locates the magnetic gap is in order to drive the voice coil loudspeaker voice coil of vibrating diaphragm vibration sound production, the vibrating diaphragm include vibration portion, by the outside book ring portion that extends of periphery of vibration portion and by book ring portion to the basin frame direction extends and is fixed in the fixed part of basin frame, vibration portion is fixed in the voice coil loudspeaker voice coil is kept away from magnetic circuit's one end. The magnetic circuit system comprises a magnetic yoke, and main magnetic steel and auxiliary magnetic steel which are fixed on the magnetic yoke. The auxiliary magnetic steel and the main magnetic steel are spaced and jointly enclose the magnetic gap.

However, in the sound generating device of the related art, the voice coil is annular, the vibrating portion is fixed to the voice coil, and this structure ensures the integrity of the bending ring portion, but the outer diameter of the voice coil is limited by the inner diameter of the vibrating portion, and the voice coil cannot exceed the inner diameter of the vibrating portion, otherwise the movement of the bending ring portion is limited, so that the size of the main magnet steel is limited, the size of the magnetic circuit cannot be increased, and the acoustic performance of the sound generating device cannot be enhanced.

Therefore, there is a need 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 but magnetic circuit maximize and acoustic performance excellent sound production device.

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; the vibration system comprises a vibrating diaphragm for vibrating and sounding, a voice coil and a framework, wherein the vibrating diaphragm is inserted into the magnetic gap to drive the vibrating diaphragm to vibrate and sound, the vibrating diaphragm comprises a vibration part, a folded ring part and a fixing part, the folded ring part extends outwards from the periphery of the vibration part, the fixing part extends towards the direction of the vibration part, the framework is attached to one side, close to the magnetic circuit system, of the vibration part, the framework is arranged along the vibration direction of the vibrating diaphragm, at least one part of the orthographic projection of the vibrating diaphragm falls into the folded ring part, the voice coil is fixed on the framework and is suspended in the magnetic gap through the framework, and at least part of the voice coil is opposite to the folded ring part.

Preferably, the skeleton is including being fixed in the voice coil loudspeaker voice coil is close to be annular skeleton body and by the skeleton fixed part that the skeleton body extends to its inboard of vibrating diaphragm one end, wherein relative both sides of skeleton body with roll over the ring portion interval and set up and follow the vibration direction to the orthographic projection of vibrating diaphragm falls into roll over the ring portion, the laminating of skeleton fixed part is fixed in vibration portion.

Preferably, the bobbin further includes a bobbin extension portion extending from the other opposite sides of the bobbin body in a direction away from the diaphragm, and the bobbin extension portion is attached to the outer peripheral side of the voice coil.

Preferably, the vibration system further comprises an elastic part arranged opposite to the vibrating diaphragm at an interval, the sound production device further comprises a basin frame, and the fixing part is fixed on the basin frame; one end of the elastic piece is fixed on the basin frame, and the other end of the elastic piece is fixed on the framework extension part.

Preferably, the framework body is of a rectangular structure, and the opposite two sides of the long axis of the framework body fall into the folded ring part along the orthogonal projection of the vibration direction to the vibrating diaphragm; the framework extension part is formed by extending two opposite sides of a short shaft of the framework body.

Preferably, the diaphragm further includes a dome fixed to a side of the vibrating portion close to the magnetic circuit system, and the skeleton fixing portion is fixed to the dome.

Preferably, the sounding device further comprises a sound guiding shell fixed to the fixing portion and far away from one side of the basin frame, the sound guiding shell and the vibrating diaphragm jointly form a sound guiding cavity, the sound guiding shell is provided with a sound guiding hole penetrating through the sound guiding shell, and the sound guiding cavity is communicated with the outside through the sound guiding hole.

Preferably, the folded ring part is of an arc structure formed by being sunken towards a direction far away from the magnetic circuit system.

Preferably, the elastic member includes a first fixing arm fixed to the frame, a second fixing arm fixed to the frame extension, and a resilient arm connecting the second fixing arm to the first fixing arm.

Preferably, the magnetic circuit system includes the yoke and is fixed in the main magnet steel of yoke, the yoke includes the yoke body and by the yoke body to the turn-ups that the basin frame direction extends, main magnet steel is fixed in the yoke body, the turn-ups with main magnet steel interval sets up and with main magnet steel forms the magnetic gap.

Compared with the prior art, the utility model discloses a sounding device sets up the skeleton laminating in vibration portion makes the voice coil loudspeaker voice coil is fixed in the skeleton passes through the skeleton supports the suspension in the magnetic gap, and sets up the skeleton is followed the vibration direction of vibrating diaphragm to the orthographic projection of vibrating diaphragm is partly gone into at least the ring portion that rolls over, simultaneously the voice coil loudspeaker voice coil at least partly with it is just to setting up to roll over the ring portion. The structure enables the outer diameter of the voice coil to be larger than the inner diameter of the vibration part, so that a larger magnetic circuit can be arranged on the inner side of the voice coil, namely the size of the magnetic steel which can be arranged on the inner side of the voice coil is larger, the size of the magnetic gap formed by the magnetic steel is increased, the magnetic circuit of the magnetic circuit system can be maximized, the magnetic force line of the magnetic circuit system is stronger, the driving force is stronger, and the acoustic performance of the sound production device is excellent.

[ 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 sectional view taken along line A-A of FIG. 1;

FIG. 4 is a sectional view taken along line B-B of FIG. 1;

fig. 5 is an exploded view of the skeleton of the sound device of the present invention;

FIG. 6 is a schematic view of an assembled three-dimensional structure of the acoustic device of the present invention, including the dome, the frame, the voice coil, and the elastic member;

fig. 7 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. 1-6, the present invention provides a sound generating device 100, wherein the sound generating device 100 includes a vibration system 2 and a magnetic circuit system 3.

The magnetic circuit system 3 has a magnetic gap 30, and the magnetic circuit system 3 includes a main magnet 32 forming the magnetic gap 30. The magnetic circuit system 3 drives the vibration system 2 to vibrate and produce sound.

In this embodiment, the sound production device 100 further includes a basin stand 1. The basin stand 1 is used for fixing the vibration system 2 and the magnetic circuit system 3.

The vibration system 2 includes a diaphragm 21, a voice coil 22, and a bobbin 23.

The diaphragm 21 is used for vibrating and sounding. In this embodiment, the diaphragm 21 is fixed to the frame 1. Of course, without being limited thereto, in an embodiment without the basin stand 1, the diaphragm 21 may also be fixed to the magnetic circuit system 3, such as a secondary magnetic steel in the magnetic circuit system 3 or a flange of a yoke.

Specifically, the diaphragm 21 includes a vibrating portion 213, a corrugated portion 212 extending outward from the periphery of the vibrating portion 213, a fixing portion 211 extending away from the vibrating portion 213 from the corrugated portion 212, and a dome 214 fixed to the vibrating portion 213 on the side close to the magnetic circuit system 3. In this embodiment, the fixing portion 211 extends from the loop portion 212 toward the frame 1 and is fixed to the frame 1.

The voice coil 22 is inserted in the magnetic gap 30 to drive the diaphragm 21 to vibrate and generate sound. In the present embodiment, the voice coil 22 has a ring shape. The main magnet 32 is located inside the voice coil 22.

The bobbin 23 is attached to the vibrating portion 213 on the side closer to the magnetic circuit system 3. The voice coil 22 is fixed to the bobbin 23 and is supported by the bobbin 23 to be suspended in the magnetic gap 30. The magnetic circuit system 3 drives the voice coil 22 to vibrate through the magnetic gap 30, and the voice coil 22 drives the diaphragm 21 to vibrate and sound through the framework 23.

The framework 23 at least partially falls into the folded ring part 212 along the vibration direction of the diaphragm 21 to the orthographic projection of the diaphragm 21, and at least part of the voice coil 22 is opposite to the folded ring part 212. This structure allows the outer diameter of the voice coil 22 to be larger than the inner diameter of the vibrating portion 213, so that a larger magnetic circuit can be disposed inside the voice coil 22, that is, the main magnetic steel 32 that can be disposed inside the voice coil 22 has a larger size, so that the size of the magnetic gap 30 formed by the main magnetic steel 32 becomes larger, the magnetic circuit of the magnetic circuit system 3 can be maximized, and the magnetic lines of force of the magnetic circuit system 3 are stronger and the driving force is stronger, so that the acoustic performance of the sound generating device 100 is excellent.

Specifically, the frame 23 includes a frame body 231 and a frame fixing portion 232.

The bobbin body 231 is fixed to one end of the voice coil 22 close to the diaphragm 21. The frame body 231 is annular. The ring shape is a ring shape of an integral structure in the present embodiment. Of course, the ring shape is not limited to this, and the multiple segments may be arranged at intervals and jointly form a ring shape.

Two opposite sides of the skeleton body 231 are spaced from the hinge portion 212. The skeleton body 231 falls into the bending part 212 along the forward projection of the vibrating diaphragm 21 in the vibrating direction. This structure allows the voice coil 22 to be enlarged, so that the main magnet 32 is also enlarged, and it is not necessary that the whole bobbin body 231 faces the hinge portion 212. This structure also allows the orthographic projections of the voice coil 22 fixed to the opposite sides of the bobbin body 231 to fall into the hinge portion 212.

The frame fixing portion 232 extends from the frame body 231 to the inner side thereof. In this embodiment, the frame fixing portion 232 is bent and extended from the frame body 231 in a direction away from the frame 1. The frame fixing portion 232 is attached to and fixed to the vibrating portion 213. In this embodiment, the frame fixing portion 232 is fixed to the dome 214. This structure allows the voice coil 22 to sequentially pass through the bobbin body 231 and the bobbin fixing portion 232 to drive the vibration portion 213 to vibrate and generate sound. Since the bobbin fixing part 232 is located at one end of the bobbin body 231 away from the frame 1, that is, the bobbin fixing part 232 is farther away from the frame 1 relative to the voice coil 22. That is, the distance between the vibration part 213 and the bobbin fixing part 232 is longer than the distance between the voice coil 22 and the frame 1, and the frame 1.

In this embodiment, the frame fixing part 232 includes a first segment 2321 and a second segment 2322.

The first segment 2321 is bent and extended from the bobbin body 231 to a position away from the magnetic circuit system 3. The first segment 2321 increases the distance between the diaphragm 21 and the voice coil 22, so that the moving space of the diaphragm 21 becomes larger, especially the moving space of the collar part 212 becomes larger, and the reliability of the diaphragm 21 is improved.

The second segment 2322 is bent and extended from the first segment 2321 in a direction away from the frame 1. The second segment 2322 is fixed to the vibrating portion 213. That is, the second segment 2322 is fixed to the vibrating portion 213 by being fixed to the dome 214.

In order to realize flexible and changeable sounding structure, in the embodiment, the sounding device further comprises a cover fixed on the fixing portion 211 far away from the sound guiding shell 4 on one side of the basin stand 1. The sound guide shell 4 and the diaphragm 21 together enclose a sound guide cavity 40. The sound guiding shell 4 is provided with sound guiding holes 41 penetrating through it. The sound guide hole 41 communicates the sound guide chamber 40 with the outside. The sound holes 41 are arranged at different positions to realize sound emitting structures in different directions, for example, the sound holes 41 and the diaphragm 21 are arranged opposite to each other to form a front sound emitting structure. The folded ring portion 212 is an arc-shaped structure formed by being recessed in a direction away from the magnetic circuit system 3. The bending ring part 212 is spaced apart from the sound guide shell 4. This structure improves the reliability of the diaphragm 21 under the protection of the sound guiding shell 4. Certainly, not limited to this, the sound guide hole 41 may also form a side sound emitting structure by being disposed on the same side of the sound guide shell 4 as the frame 1, so that the front sound emitting structure is convenient to use under the condition that the front sound emitting structure is blocked, and the use flexibility is higher.

In this embodiment, the vibration system 2 further includes an elastic member 24 disposed opposite to the diaphragm 21 at an interval. Specifically, the elastic member 24 includes a first fixing arm 241 fixed to the frame 1, a spring arm 242 bent and extended from the first fixing arm 241 in the direction of the voice coil 22, and a second fixing arm 243 bent and extended from the spring arm 242. The elastic arm 242 connects the second fixing arm 243 to the first fixing arm 241 to achieve an elastic connection.

The elastic member 24 is a flexible 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 this embodiment, the two elastic members 24 are provided, and the two elastic members 24 are respectively disposed on two opposite sides of the voice coil 22, so that the supporting effect of the double-elastic-member structure on the voice coil 22 is more stable, and the capability of the double-elastic-member structure for suppressing the swing of the voice coil 22 is optimal.

In the present embodiment, the bobbin 23 further includes a bobbin extension 233 extending from the bobbin main body 231 in a direction of the magnetic circuit system 3.

In this embodiment, the frame body 231 has a rectangular structure. The opposite sides of the long axis of the skeleton body 231 fall into the bending part 212 along the orthogonal projection of the vibrating diaphragm 21 in the vibration direction. This structure makes the main magnet 32 disposed on the long axis of the frame body 231 longer than the short axis of the frame body 231, which is advantageous for improving the driving force of the magnetic circuit. While the bobbin extension 233 is formed by extending opposite sides of the short axis of the bobbin body 231. The structure enables the elastic member 24 to be arranged on two opposite sides of the short shaft of the skeleton body 231, and the space of the short shaft of the skeleton body 231 can be effectively utilized, so that the sounder 100 is more compactly installed, the internal structure is optimized, and the sounder 100 is smaller in size.

Specifically, the bobbin extension 233 includes a third segment 2331 bent and extended from the bobbin body 231 in the direction of the magnetic circuit system 3, and a fourth segment 2332 bent and extended from the third segment 2331 in the direction of the frame 1.

The bobbin extension 233 is disposed outside the voice coil 22, one end of the elastic member 24 is fixed to the frame 1, and the other end of the elastic member 24 is fixed to the bobbin extension 233. Specifically, the second fixing arm 243 is fixed to the frame extension 233. The fourth segment 2332 is fixed to the elastic member 24, i.e., the fourth segment 2332 is fixed to the frame extension 233. This structure allows the elastic member 24 to prevent the voice coil 22 from laterally swinging, thereby achieving a stable supporting effect of the voice coil 22.

In the present embodiment, the magnetic circuit system 3 includes a yoke 31 and the main magnet steel 32 fixed to the yoke 31. The magnetic yoke 31 comprises a magnetic yoke body 311 and a flange 312 extending from the magnetic yoke body 311 to the direction of the basin stand 1. The main magnet steel 32 is fixed to the yoke body 311. The turned edge 312 is spaced apart from the main magnet 32 and forms the magnetic gap 30 with the main magnet 32. Of course, it is also possible to use secondary magnetic steel instead of the flange 312.

Referring to fig. 7, fig. 7 is a cross-sectional view of another embodiment of fig. 3. In another embodiment, a sounder device 100a is provided which differs from the embodiment shown in fig. 3 in that the arcuate configuration of the corrugated portion is oriented in a different direction.

Specifically, the folded ring portion 212a has an arc-shaped structure formed by being recessed in a direction toward the magnetic path system 3 a. The bent ring portion 212a is spaced apart from the first segment 2321 a. The structure reduces the height of the hinge portion 212a at the sound device 100a, and the diaphragm 21a is mounted on the sound device 100a to fully utilize the internal space of the sound device 100a, so that the sound device 100a is light and thin.

The above embodiments of the present invention are only described, and it should be noted that, for those skilled in the art, modifications can be made without departing from the inventive concept, but these all fall into the protection scope of the present invention.

Claims

1. A sound production device comprises a vibration system and a magnetic circuit system which has a magnetic gap and drives the vibration system to vibrate; the vibration system comprises a vibrating diaphragm for vibrating and sounding, a voice coil and a framework, wherein the vibrating diaphragm is inserted into the magnetic gap to drive the vibrating diaphragm to vibrate and sound, the vibrating diaphragm comprises a vibrating part, a folded ring part and a fixing part, the folded ring part extends outwards from the periphery of the vibrating part, the fixing part extends towards the direction of the vibrating part, the framework is attached to one side, close to the magnetic circuit system, of the vibrating part, the vibration system is characterized in that the framework is arranged along the vibrating direction of the vibrating diaphragm, at least one part of the orthographic projection of the vibrating diaphragm falls into the folded ring part, the voice coil is fixed in the framework and is suspended in the magnetic gap through the framework, and at least one part of the voice coil is arranged opposite to the folded ring part.

2. The sounding device according to claim 1, wherein the bobbin includes an annular bobbin body fixed to one end of the voice coil near the diaphragm and a bobbin fixing portion extending from the bobbin body to an inner side of the bobbin body, opposite sides of the bobbin body are spaced from the edge portion and fall into the edge portion along the vibration direction to an orthographic projection of the diaphragm, and the bobbin fixing portion is attached and fixed to the vibration portion.

3. The sounding device according to claim 2, wherein the bobbin further comprises a bobbin extension portion extending from the other two opposite sides of the bobbin body in a direction away from the diaphragm, and the bobbin extension portion is attached to the outer periphery of the voice coil.

4. The sounder device according to claim 3, wherein the vibration system further comprises a resilient member spaced opposite the diaphragm, the sounder device further comprising a frame, the fixed portion being secured to the frame; one end of the elastic piece is fixed on the basin frame, and the other end of the elastic piece is fixed on the framework extension part.

5. The sounding device according to claim 3, wherein the skeleton body is rectangular, and the two opposite sides of the long axis of the skeleton body fall into the bending ring part along the orthogonal projection of the vibration direction to the diaphragm; the framework extension part is formed by extending two opposite sides of a short shaft of the framework body.

6. The sounding device according to claim 1, wherein the diaphragm further comprises a dome fixed to a side of the vibrating portion close to the magnetic circuit system, and the skeleton fixing portion is fixed to the dome.

7. The sound production device according to claim 4, further comprising a sound guiding shell covering and fixed on a side of the fixing portion away from the basin frame, wherein the sound guiding shell and the vibrating membrane together form a sound guiding cavity, the sound guiding shell is provided with a sound guiding hole penetrating through the sound guiding shell, and the sound guiding hole communicates the sound guiding cavity with the outside.

8. The sounder device according to claim 7, wherein the collar portion is in the form of an arc that is concave away from the magnetic circuit.

9. The sounder device according to claim 7, wherein the resilient member comprises a first securing arm secured to the basin frame, a second securing arm secured to the spine extension, and a resilient arm connecting the second securing arm to the first securing arm.

10. The sound production device as claimed in claim 4, wherein the magnetic circuit system comprises a magnetic yoke and a main magnetic steel fixed on the magnetic yoke, the magnetic yoke comprises a magnetic yoke body and a flange extending from the magnetic yoke body to the basin frame, the main magnetic steel is fixed on the magnetic yoke body, and the flange is spaced from the main magnetic steel and forms the magnetic gap with the main magnetic steel.