CN211019210U

CN211019210U - Sound production device

Info

Publication number: CN211019210U
Application number: CN201922246255.7U
Authority: CN
Inventors: 宋威; 张帆; 钟志威
Original assignee: AAC Technologies Pte Ltd
Current assignee: AAC Technologies Pte Ltd
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-07-14
Anticipated expiration: 2029-12-13

Abstract

The utility model provides a sounding device, which comprises a basin frame with an accommodating space and a vibration system accommodated in the accommodating space, wherein the vibration system comprises a vibration diaphragm fixed on the basin frame, and the vibration diaphragm comprises a ball top positioned at the central position and a folding ring surrounding the ball top and fixed on the basin frame; the ball top is provided with a first through hole penetrating through the ball top along the vibration direction of the vibrating diaphragm; the vibrating diaphragm also comprises a radiating fin which is attached to the top of the ball and completely covers the first through hole. Compared with the prior art, the utility model discloses a sound production device radiating effect is good and the reliability is high.

Description

Sound production device

[ technical field ] A method for producing a semiconductor device

The utility model relates to an electroacoustic transduction field especially relates to an apply to vocal device of 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 of the related art comprises a basin frame, a vibration system and a magnetic circuit, wherein the vibration system is fixed on the basin frame, the magnetic circuit drives the vibration system to vibrate and produce sound, and the vibration system comprises a vibrating diaphragm fixed on the basin frame, a ball top fixed on the vibrating diaphragm and a voice coil used for driving the vibrating diaphragm to vibrate. The ball top is a composite structure formed by overlapping an aluminum foil layer and a foaming material.

However, in the related art, when the sound generating device generates sound by vibration, heat is easily accumulated in the device, and the heat dissipation performance of the foaming material is poor, so that the heat in the device is not easily dissipated in time, the volume of the gas in the device is expanded, and the reliability of the sound generation by vibration is affected.

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 sound production device that radiating effect is good and the reliability is high.

In order to achieve the above object, the present invention provides a sound production device, which comprises a basin frame having an accommodating space and a vibration system accommodated in the accommodating space, wherein the vibration system comprises a vibration diaphragm fixed on the basin frame, the vibration diaphragm comprises a ball top located at a central position and a folding ring surrounding the ball top and fixed on the basin frame; the ball top is provided with a first through hole penetrating through the ball top along the vibration direction of the vibrating diaphragm; the diaphragm further comprises a radiating fin which is attached to the top of the ball and completely covers the first through hole.

Preferably, the folding ring comprises a connecting part surrounding the top of the ball, a folding ring part extending by outwards bending the edge of the connecting part and a fixing part extending outwards on one side of the connecting part, the connecting part is fixedly connected with the top of the ball, and the fixing part is fixed on the basin stand.

Preferably, the sounding device further comprises a magnetic circuit system fixed on the basin frame for driving the vibration system to vibrate and sound, the basin frame, the vibrating diaphragm and the magnetic circuit system jointly enclose a sounding inner cavity, and the radiating fin is in direct contact with the sounding inner cavity.

Preferably, the periphery of the dome on the side away from the magnetic circuit system is recessed along the vibration direction to form a fixing groove, and the connecting portion is attached and fixed in the fixing groove.

Preferably, the dome includes a lower surface close to the magnetic circuit system, an upper surface opposite to the lower surface and far from the magnetic circuit system, and a side surface connecting the upper surface and the lower surface, the side surface being enclosed by the first through hole, and the heat sink is fixedly connected to the side surface.

Preferably, the magnetic circuit system has a magnetic gap, the vibration system further includes a voice coil inserted into the magnetic gap to drive the diaphragm to vibrate and sound, the voice coil is connected to the dome, and the orthographic projection of the heat sink to the voice coil along the vibration direction completely falls within the range of the voice coil.

Preferably, the vibration system further comprises a voice coil bracket, and the voice coil is connected with the ball top through the voice coil bracket.

Preferably, the voice coil support comprises a support main body connecting the dome and the voice coil, and a connecting arm bent and extended from the support main body to a direction away from the diaphragm; the vibration system further comprises an auxiliary vibrating diaphragm arranged at an interval with the vibrating diaphragm, one side of the auxiliary vibrating diaphragm is fixed on the basin frame and is far away from one side of the vibrating diaphragm, and the other side of the auxiliary vibrating diaphragm is fixed on the connecting arm and is far away from one side of the vibrating diaphragm.

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

Preferably, the heat sink is a metal heat sink.

Compared with the prior art, the sound production device of the utility model is characterized in that the ball top is provided with a first through hole penetrating through the ball top along the vibration direction of the vibrating diaphragm; the vibrating diaphragm also comprises a radiating fin which is attached to the top of the ball and completely covers the first through hole, and the radiating fin is directly contacted with the interior of the sounding device and is used for radiating heat in the sounding device to the outside; through the arrangement of the radiating fins, the vibrating diaphragm is good in radiating effect, and meanwhile, internal heat can be conveniently and timely radiated outwards, so that the volume balance of gas inside the sounding device can be kept, and the vibration reliability of the sounding device can be 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 schematic view of a part of the three-dimensional structure of the sound generating device of the present invention;

fig. 3 is a sectional view taken along line a-a of fig. 1.

[ 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, and a magnetic circuit system 3 having a gap 30.

The basin stand 1 is annular and has an accommodating space 10 for supporting the vibration system 2 and the magnetic circuit system 3.

The vibration system 2 is accommodated in the accommodating space 10 and is fixedly supported on the basin stand 1; the magnetic circuit system 3 is fixed on the basin frame 1 and used for driving the vibration system 2 to vibrate and sound.

In the present embodiment, the vibration system 2 includes a diaphragm 21, a voice coil 22, a voice coil holder 23, and an auxiliary diaphragm 24.

The vibrating diaphragm 21 is fixed on the frame 1 for vibrating and sounding, and comprises a corrugated rim 211, a dome 212 and a heat sink 213; the folding ring 211 surrounds the dome 212 and is fixed to the basin stand 1, the dome 212 is attached to the folding ring 211, the dome 212 is located in the center of the diaphragm 21, the dome 212 is provided with a first through hole 2120 penetrating through the diaphragm 21 in the vibration direction, and the heat sink 213 is attached to the dome 212 and completely covers the first through hole 2120.

Further, the edge 211 includes a connection portion 2111, an edge portion 2112, and a fixing portion 2113; the connecting portion 2111 surrounds the dome 212, the folded ring portion 2112 is formed by outward bending and extending of the edge of the connecting portion 2111, the fixing portion 2113 is formed by outward extending of one side of the folded ring portion 2112 away from the connecting portion 2111, the dome 212 is attached to the connecting portion 2111, and the fixing portion 2113 is fixed to the frame 1.

It should be noted that the heat sink 213 is a metal heat sink; magnetic circuit 3 is fixed in basin frame 1 keeps away from vibrating diaphragm 21 one side, basin frame 1 vibrating diaphragm 21 and magnetic circuit 3 enclose into sound production inner chamber 101 jointly, fin 213 with sound production inner chamber 101 direct contact is used for with the inside heat of sound production device 100 is to the external world gived off.

In order to improve the reliability of the fixation between the dome 212 and the edge ring 211, it is preferable that a fixing groove 2121 is formed along the vibration direction in a recessed portion of the periphery of the dome 212 on the side away from the magnetic circuit system 3, and the connecting portion 2111 is attached to and fixed in the fixing groove 2121 on the side close to the vibration system 2, so that the fixing reliability of the dome 212 and the connecting portion 2111 is effectively improved by the fixing groove 2121.

Further, dome 212 includes a lower surface 2121 close to magnetic circuit 3, an upper surface 2122 opposite to lower surface 2121 and far from magnetic circuit 3, and a side surface 2123 connecting upper surface 2122 and lower surface 2121, wherein side surface 2123 is enclosed by first through hole 2120, and heat sink 213 is fixedly connected to side surface 2123.

The voice coil 22 is inserted in the magnetic gap 30 to drive the connection portion 2111 to vibrate and generate sound; it should be noted that the connection relationship between the voice coil 22 and the diaphragm 21 is not limited, for example, in the present embodiment, the voice coil 22 is connected to the ball top 212 through the voice coil bracket 23; of course, it is also possible that the voice coil is directly connected to the connection portion, or directly connected to the dome.

Further, the orthographic projection of the heat sink 213 to the voice coil 22 along the vibration direction falls entirely within the range of the voice coil 22.

The voice coil support 23 includes a support main body 231 connecting the dome 212 and the voice coil 22, and a connecting arm 232 extending from the support main body 231 in a direction away from the diaphragm 21.

The auxiliary vibrating diaphragm 24 and the vibrating diaphragm 21 are arranged at an interval, one side of the auxiliary vibrating diaphragm 24 is fixed to the side, away from the vibrating diaphragm 21, of the basin stand 1, and the other side of the auxiliary vibrating diaphragm is fixed to the side, away from the vibrating diaphragm 21, of the connecting arm 232; by the arrangement of the auxiliary diaphragm 24, the lateral movement of the vibration system 2 is effectively inhibited, the overall rigidity of the vibration system 2 is improved, the vibration performance is better, and the acoustic performance of the sound production device 100 is optimized.

In the above-mentioned structure, when voice coil 22 circular telegram, voice coil 22 passes through voice coil support 23 with ball top 212 is with the drive connecting portion 2111 vibration sound production, at this vibration sound production in-process, the inside of sound production device 100 produces heat easily, absorbs the heat of inside and gives off to the external world through fin 213 for inside radiating effect is good, effectively guarantees inside temperature balance and atmospheric pressure balance, has avoided causing the phenomenon that vibrating diaphragm 21 drops because of inside atmospheric pressure is too big, has improved sound production device 100's reliability.

The magnetic circuit system 3 includes a yoke 31, a main magnetic steel 32, and a sub magnetic steel (not shown).

The magnetic yoke 31 is fixed on one side of the basin stand 1 far away from the vibrating diaphragm 21; the main magnet steel 32 is fixed on the magnetic yoke 31; the vice magnet steel is including being fixed in respectively two first vice magnet steel 33 and two second vice magnet steel 34 of basin frame 1, two first vice magnet steel 33 set up in the relative both sides of main magnet steel 32, two the vice magnet steel 34 of second set up in main magnet steel 32's other relative both sides, main magnet steel 32, two first vice magnet steel 33 and two the vice magnet steel 34 of second sets up and forms jointly at interval each other magnetic gap 30.

It should be noted that the number of the auxiliary diaphragms 24 is not limited, and it may be specifically set according to the actual design requirement, for example, in this embodiment, the auxiliary diaphragms 24 include two, two of the auxiliary diaphragms 24 are disposed on two opposite sides of the main magnetic steel 31, and each of the auxiliary diaphragms 24 is located near the second auxiliary magnetic steel 34 and is set to recede from the second auxiliary magnetic steel 34.

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 basin frame with an accommodating space and a vibration system accommodated in the accommodating space, wherein the vibration system comprises a vibration diaphragm fixed on the basin frame, the vibration diaphragm comprises a ball top positioned at the central position and a folding ring surrounding the ball top and fixed on the basin frame, and the vibration system is characterized in that the ball top is provided with a first through hole penetrating through the vibration diaphragm along the vibration direction of the vibration diaphragm; the diaphragm further comprises a radiating fin which is attached to the top of the ball and completely covers the first through hole.

2. The sounding device according to claim 1, wherein the corrugated ring comprises a connecting portion surrounding the top dome, a corrugated ring portion extending from an edge of the connecting portion to be bent outwards, and a fixing portion extending outwards from a side of the corrugated ring portion away from the connecting portion, the connecting portion is fixedly connected with the top dome, and the fixing portion is fixed to the frame.

3. The sound production device of claim 2, further comprising a magnetic circuit system fixed to the frame for driving the vibration system to vibrate and produce sound, wherein the frame, the diaphragm and the magnetic circuit system together define a sound production cavity, and the heat sink directly contacts the sound production cavity.

4. The sounding device as claimed in claim 3, wherein the periphery of the top dome at a side away from the magnetic circuit system is recessed along the vibration direction to form a fixing groove, and the connecting portion is attached and fixed in the fixing groove.

5. The sounder device according to claim 4, wherein the dome comprises a lower surface proximate the magnetic circuit, an upper surface disposed opposite and distal from the lower surface, and a side surface connecting the upper surface and the lower surface, the side surface enclosing the first through hole, the heat sink fixedly attached to the side surface.

6. The sounding device as claimed in claim 3, wherein the magnetic circuit system has a magnetic gap, the vibration system further comprises a voice coil inserted in the magnetic gap for driving the diaphragm to vibrate and sound, the voice coil is connected to the ball top, and the orthographic projection of the heat sink to the voice coil along the vibration direction completely falls within the range of the voice coil.

7. The sounder device according to claim 6, wherein the vibration system further comprises a voice coil mount, the voice coil being connected to the dome by the voice coil mount.

8. The sounding device according to claim 7, wherein the voice coil support comprises a support main body connecting the dome and the voice coil, and a connecting arm extending from the support main body in a bending manner in a direction away from the diaphragm; the vibration system further comprises an auxiliary vibrating diaphragm arranged at an interval with the vibrating diaphragm, one side of the auxiliary vibrating diaphragm is fixed on the basin frame and is far away from one side of the vibrating diaphragm, and the other side of the auxiliary vibrating diaphragm is fixed on the connecting arm and is far away from one side of the vibrating diaphragm.

9. The sounding device according to claim 6, wherein the magnetic circuit system comprises a magnetic yoke fixed on a side of the frame away from the diaphragm, a main magnetic steel fixed on the magnetic yoke, and a secondary magnetic steel fixed on the magnetic yoke and spaced from the main magnetic steel to form the magnetic gap.

10. The sounder device according to claim 1, wherein the heat sink is a metal heat sink.