CN214177551U

CN214177551U - Sound production device

Info

Publication number: CN214177551U
Application number: CN202022223398.9U
Authority: CN
Inventors: 宋威; 肖波; 令狐荣林; 孔晨亮; 章统
Original assignee: AAC Technologies Pte Ltd
Current assignee: AAC Technologies Pte Ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-09-10
Anticipated expiration: 2030-09-30
Also published as: WO2022067985A1

Abstract

The utility model provides a sounding device, which comprises a basin frame, a vibration system and a magnetic circuit system, wherein the vibration system comprises a vibrating diaphragm and a voice coil for driving the vibrating diaphragm to vibrate and sound, the vibrating diaphragm is annular and is arranged around the magnetic circuit system, and the peripheral side of the vibrating diaphragm is fixed on the basin frame; the magnetic circuit system comprises a magnetic yoke fixed on the basin frame, main magnetic steel fixed on the magnetic yoke respectively, auxiliary magnetic steel surrounding the main magnetic steel and a magnetic conduction plate attached and fixed on one side, away from the magnetic yoke, of the auxiliary magnetic steel, the auxiliary magnetic steel and the main magnetic steel form a magnetic gap at an interval, the voice coil is inserted into the magnetic gap, the magnetic conduction plate presses the inner periphery side of the vibrating diaphragm on the auxiliary magnetic steel, and the magnetic conduction plate is abutted to the main magnetic steel. Compared with the prior art, the utility model discloses a fixed vibrating diaphragm of vocal device's part is few, simple structure and easily equipment.

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 in the related art comprises a basin frame, a vibration system and a magnetic circuit system, wherein the vibration system is respectively fixed on the basin frame, the magnetic circuit system drives the vibration system to vibrate and produce sound, the vibration system comprises a vibrating diaphragm and a middle steel ring, the vibrating diaphragm is fixed on the basin frame, the middle steel ring is fixed on the vibrating diaphragm, the vibrating diaphragm is in an annular shape and is arranged around the magnetic circuit system, the peripheral side of the vibrating diaphragm is fixed on the basin frame, the inner peripheral side of the vibrating diaphragm is fixed on the middle steel ring, and the middle steel ring is fixed on the magnetic circuit system; the magnetic circuit system comprises a magnetic yoke fixed on the basin frame.

However, the middle steel ring of the sound production device in the related art is generally fixed to the yoke, and the structure uses more accessories, is structurally auxiliary, is not easy to manufacture and assemble, and has higher cost.

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 part of fixed vibrating diaphragm is few, simple structure and the vocal ware of easily assembling.

In order to achieve the above object, the present invention provides a sound generating device, which comprises a frame, a vibration system fixed on the frame, and a magnetic circuit system for driving the vibration system to vibrate and generate sound, wherein the vibration system comprises a vibrating diaphragm and a voice coil for driving the vibrating diaphragm to vibrate and generate sound, the vibrating diaphragm is annular and is arranged around the magnetic circuit system, and the peripheral side of the vibrating diaphragm is fixed on the frame; the magnetic circuit system comprises a magnetic yoke fixed on the basin frame, main magnetic steel fixed on the magnetic yoke respectively, auxiliary magnetic steel surrounding the main magnetic steel and a magnetic conduction plate attached and fixed on one side, away from the magnetic yoke, of the auxiliary magnetic steel, the auxiliary magnetic steel and the main magnetic steel form a magnetic gap at an interval, the voice coil is inserted into the magnetic gap, the magnetic conduction plate presses the inner periphery side of the vibrating diaphragm on the auxiliary magnetic steel, and the magnetic conduction plate is abutted to the main magnetic steel.

Preferably, the magnetic conduction plate is attached to one side of the main magnetic steel, which is far away from the magnetic yoke, and the magnetic conduction plate presses the inner circumference side of the vibrating diaphragm on the main magnetic steel.

Preferably, the magnetic conduction plate comprises a magnetic conduction plate body and an accommodating step formed by the periphery of the magnetic conduction plate body in a concave mode, the inner peripheral side of the vibrating diaphragm is attached and fixed and is accommodated in the accommodating step, and one side, close to the magnetic yoke, of the inner peripheral side of the vibrating diaphragm is flush with one side, close to the magnetic yoke, of the magnetic conduction plate body.

Preferably, the diaphragm includes a first annular flange portion, a second annular flange portion surrounding the first annular flange portion and spaced from each other, a first vibrating portion extending from an outer peripheral side of the first flange portion to the second flange portion in a bent manner, a second vibrating portion extending from an inner peripheral side of the second flange portion to the first flange portion in a bent manner, a first fixing portion extending from an inner peripheral side of the first flange portion in a bent manner, a second fixing portion extending from an outer peripheral side of the second flange portion in a bent manner, and a dome portion respectively covering a side of the first vibrating portion close to the magnetic yoke and a side of the second vibrating portion close to the magnetic yoke, the first fixing portion is fixed to the accommodating step, and the second fixing portion is fixed to the frame; the first vibrating portion is connected to the second vibrating portion.

Preferably, the first flange portion is an arc-shaped structure formed by sinking towards the direction away from the magnetic yoke, and the second flange portion is an arc-shaped structure formed by sinking towards the direction close to the magnetic yoke.

Preferably, the vibration system further comprises an elastic support assembly and a framework which are annular and arranged at intervals around the magnetic circuit system, and the outer peripheral side of the elastic support assembly is fixed on the basin frame; the skeleton is including being annular skeleton body and by the skeleton body to the skeleton fixed part that the magnetic gap extends, the ball top with the inner periphery of elastic support subassembly is fixed in respectively the relative both ends of skeleton body, the skeleton fixed part is fixed in the voice coil loudspeaker voice coil.

Preferably, the main magnetic steel comprises an upper main magnetic steel, a main pole core and a lower main magnetic steel which are sequentially stacked along the vibration direction of the vibrating diaphragm, and the lower main magnetic steel is fixed on the magnetic yoke; the auxiliary magnetic steel comprises upper auxiliary magnetic steel, an auxiliary pole core and lower auxiliary magnetic steel which are sequentially stacked along the vibration direction of the vibrating diaphragm, and the lower auxiliary magnetic steel is fixed on the magnetic yoke.

Preferably, the secondary magnet steels comprise two and are respectively located at two opposite sides of the primary magnet steel.

Preferably, along the vibration direction of the diaphragm, the projection of the upper main magnetic steel to the magnetic yoke, the projection of the main pole core to the magnetic yoke, and the projection of the lower main magnetic steel to the magnetic yoke are completely overlapped; along the vibration direction of the vibrating diaphragm, the projection of the upper auxiliary magnetic steel to the magnetic yoke, the projection of the auxiliary pole core to the magnetic yoke and the projection of the lower auxiliary magnetic steel to the magnetic yoke are completely overlapped.

Preferably, a side surface of the upper auxiliary magnetic steel far away from the magnetic yoke is flush with a side surface of the upper main magnetic steel far away from the magnetic yoke.

Compared with the prior art, the utility model discloses a sounder sets up the subsides of magnetic circuit and establishes and be fixed in vice magnet steel is kept away from the magnetic conduction board of one side of yoke, and pass through the magnetic conduction board will interior week side pressure of vibrating diaphragm is located on the vice magnet steel, the magnetic conduction board butt in main magnet steel. This structure will the interior week side clamp of vibrating diaphragm is located vice magnet steel with form fixed knot between the magnetic conduction board and construct to avoid the correlation technique to adopt the more well steel ring structure of part, thereby make utility model's vocal device fixed the part of vibrating diaphragm is few, simple structure and easily equipment.

[ 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 an enlarged view of the portion indicated by B in FIG. 3;

fig. 5 is a schematic view of an assembled three-dimensional structure of the vibrating diaphragm, the magnetic conductive plate, the main magnetic steel and the auxiliary magnetic steel of the sound device of the present invention;

fig. 6 is an exploded view of the partial perspective structure of fig. 5.

[ 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 basin frame 1, a vibration system 2 fixed on the basin frame 1, and a magnetic circuit system 3 for driving the vibration system 2 to vibrate and generate sound. The magnetic circuit 3 has a magnetic gap 30.

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

The diaphragm 21 is annular and disposed around the magnetic circuit system 3. The peripheral side of the upper vibrating diaphragm 21 is fixed on the side of the basin stand 1 away from the magnetic circuit system 3. The inner peripheral side of the upper diaphragm 21 is fixed to the magnetic circuit system 3.

Specifically, the diaphragm 21 includes a first annular flange portion 211, a second annular flange portion 212 surrounding the first annular flange portion 211 and spaced from each other, a first vibration portion 213 extending from the outer peripheral side of the first annular flange portion 211 to the second annular flange portion 212 in a bent manner, a second vibration portion 215 extending from the inner peripheral side of the second annular flange portion 212 to the first annular flange portion 211 in a bent manner, a first fixing portion 214 extending from the inner peripheral side of the first annular flange portion 211 in a bent manner, a second fixing portion 216 extending from the outer peripheral side of the second annular flange portion 212 in a bent manner, and a spherical top portion 217 covering the first vibration portion 213 and the second vibration portion 215 respectively. Wherein, the second fixing part 216 is fixed on the frame 1.

In the present embodiment, the first vibration part 213 is connected to the second vibration part 215. This structure allows the first vibration part 213, the second vibration part 215, and the ball top 217 to form an integrated structure, so that the acoustic performance of the vibration sound of the diaphragm 21 is good, and delamination caused by vibration can be prevented.

In this embodiment, the first flange portion 211 has an arc-shaped structure that is recessed in a direction away from the magnetic yoke 31, and the second flange portion 212 has an arc-shaped structure that is recessed in a direction closer to the magnetic yoke 31. This structure makes the arc structure of first dog-ear portion 211 with the arc structure of second dog-ear portion 212 is reverse setting, thereby makes the acoustic performance of the vibration sound production of vibrating diaphragm 21 is good, also prevents simultaneously that vibration amplitude from arousing too greatly first dog-ear portion 211 with the risk of second dog-ear portion 212 layering has improved the reliability of vibrating diaphragm 21. Of course, the first ring-folding portion 211 may have an arc-shaped structure that is recessed toward the yoke 31.

The voice coil 22 drives the diaphragm 21 to vibrate and generate sound. The voice coil 22 is inserted into the magnetic gap 30.

The bobbin 23 includes a bobbin body 231 having a ring shape and a bobbin fixing portion 232 extending from the bobbin body 231 to the magnetic gap 30.

The frame body 231 is fixed to the ball top 217. Wherein the ball top 217 and the inner circumference of the elastic support member 24 are fixed to opposite ends of the frame body 231, respectively.

The bobbin fixing portion 232 is fixed to the voice coil 22. The voice coil 23 drives the framework 23 to drive the diaphragm 21 to vibrate.

The elastic support members 24 are annular and are spaced around the magnetic circuit system 3. The outer periphery of the elastic support component 24 is fixed to the frame 1, and the inner periphery of the elastic support component 24 is fixed to one end of the skeleton body 231 away from the diaphragm 21. The elastic supporting component 24 is used for balancing the vibration of the voice coil 22, and the elastic supporting component 24 supports the voice coil 23 more stably and has better vibration reliability. In this embodiment, the second folded-up ring portion 212 is disposed opposite to the elastic support member 24. This structure makes the acoustic performance of the vibration sound production of the diaphragm 21 good.

The magnetic circuit system 3 includes a magnetic yoke 31, a main magnetic steel 32, an auxiliary magnetic steel 33, and a magnetic conductive plate 34.

The magnetic yoke 31 is fixed on the basin stand 1. Ball top 217 covers first vibration portion 213 on the side closer to yoke 31 and second vibration portion 215 on the side closer to yoke 31.

The main magnet steel 32 is fixed to the yoke 31. The main magnetic steel 32 includes an upper main magnetic steel 321, a main pole core 322, and a lower main magnetic steel 323 sequentially stacked along the vibration direction of the diaphragm 21, and the lower main magnetic steel 323 is fixed to the yoke 31. In the structure, the main magnetic steel 323 is provided as two magnetic steel structures of the upper main magnetic steel 321 and the lower main magnetic steel 323, and the two magnetic steel structures can increase the driving force of the magnetic lines of force of the magnetic gap 30, so that the magnetic lines of force of the magnetic circuit system 3 are cut by the voice coil 22 as much as possible to form a larger driving force magnetic circuit space. In addition, the depth of the magnetic gap 30 is increased through the main pole core 322, that is, the depth of the formed magnetic gap 30 is the sum of the thicknesses of the three parts of the upper main magnetic steel 321, the main pole core 322 and the lower main magnetic steel 323, so that the driving force of the magnetic lines of force of the magnetic gap 30 is ensured, the moving range of the voice coil 22 in the magnetic gap 30 is wide, the sensitivity of the sound generating device 100 is high, and the acoustic performance of the sound generating device 100 is excellent.

In this embodiment, along the vibration direction of the diaphragm 21, the projection of the upper main magnet steel 321 to the yoke 31, the projection of the main pole core 322 to the yoke 31, and the projection of the lower main magnet steel 323 to the yoke 31 completely overlap. This configuration allows the primary magnet 32 to be formed as a unitary structure to provide a more uniform magnetic field within the magnetic gap 30, while also being easier to manufacture and assemble.

The sub magnetic steel 33 is fixed to the yoke 31. The secondary magnetic steel 33 surrounds the primary magnetic steel 32. In this embodiment, the two secondary magnetic steels 33 are respectively located at two opposite sides of the primary magnetic steel 32. The secondary magnetic steel 33 and the primary magnetic steel 32 are spaced to form the magnetic gap 30.

Specifically, the auxiliary magnetic steel 33 includes an upper auxiliary magnetic steel 331, an auxiliary pole core 332, and a lower auxiliary magnetic steel 333 that are sequentially stacked along the vibration direction of the diaphragm 21, and the lower auxiliary magnetic steel 333 is fixed to the magnetic yoke 31. The structure forms a six-magnetic-circuit structure, and the first secondary magnetic steel 33 and the primary magnetic steel 32 are completely matched in height, so that the formed magnetic field in the magnetic gap 30 is more balanced, the driving force of the magnetic lines of force of the magnetic gap 30 is ensured, and the moving range of the voice coil 22 in the magnetic gap 30 is wide.

In the present embodiment, along the vibration direction of the diaphragm 21, the projection of the upper sub magnetic steel 331 to the magnetic yoke 31, the projection of the sub pole core 332 to the magnetic yoke 31, and the projection of the lower sub magnetic steel 333 to the magnetic yoke 31 completely overlap each other. This configuration allows the secondary magnets 33 to be formed as a unitary structure to provide more uniform magnetic fields within the magnetic gap 30 and to be easier to manufacture and assemble.

In this embodiment, a surface of the upper auxiliary magnetic steel 331 away from the magnetic yoke 31 is flush with a surface of the upper main magnetic steel 321 away from the magnetic yoke 31. This configuration makes the magnetic field in the magnetic gap 30 more uniform, and also facilitates the installation and fixation of the magnetic conductive plate 34 for increasing the magnetic force lines.

The magnetic conductive plate 34 includes a magnetic conductive plate body 341 and an accommodating step 342 formed by recessing the periphery of the magnetic conductive plate body 341.

In order to reduce the magnetic field leakage of the magnetic circuit system 3, the magnetic conductive plate 34 is configured as a flat plate, and the magnetic conductive plate 34 covers the main magnet 32 and the magnetic gap 30. The magnetic conductive plate 34 abuts against the main magnetic steel 32. The magnetic conducting plate 34 is attached and fixed to one side of the main magnetic steel 32 away from the magnetic yoke 31. Specifically, the main magnetic steel 32 is attached to and fixed to the magnetic conductive plate body 341.

The magnetic conducting plate 34 is attached and fixed to one side of the auxiliary magnetic steel 33 far away from the magnetic yoke 31. The magnetic conduction plate 34 presses the inner peripheral side of the diaphragm 21 between the auxiliary magnetic steels 33, so that the fixing strength of the diaphragm 21 is enhanced, and the reliability is improved.

The inner peripheral side of the diaphragm 21 is attached and fixed and is accommodated in the accommodating step 342. Specifically, the first fixing portion 214 is fixed to the receiving step 342. One side of the inner peripheral side of the diaphragm 21 close to the yoke 31 is flush with one side of the magnetic conductive plate body 341 close to the yoke 31. The structure is easy to be simple and easy to be assembled, thereby improving the reliability and ensuring that the sound production device 100 has high yield.

Preferably, the magnetic conductive plate 34 presses the inner peripheral side of the diaphragm 21 against the main magnetic steel 32. This structure makes the magnetic conductive plate 34 stably fix the diaphragm 21 to the main magnetic steel 32 and the auxiliary magnetic steel 33. Thereby this structure avoids the prior art to adopt the more well steel ring structure of part to make utility model's vocal device 100 fixed vibrating diaphragm 21's part is few, simple structure and easily equipment.

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, a vibration system and a magnetic circuit system, wherein the vibration system is respectively fixed on the basin frame, the magnetic circuit system drives the vibration system to vibrate and produce sound, the vibration system comprises a vibrating diaphragm and a voice coil, the voice coil drives the vibrating diaphragm to vibrate and produce sound, the vibrating diaphragm is annular and is arranged around the magnetic circuit system, and the peripheral side of the vibrating diaphragm is fixed on the basin frame; magnetic circuit including being fixed in the yoke of basin frame, being fixed in respectively the main magnet steel of yoke and encircleing the vice magnet steel of main magnet steel, vice magnet steel with the main magnet steel interval forms the magnetic gap, the voice coil loudspeaker voice coil inserts the magnetic gap, its characterized in that, magnetic circuit still establishes including pasting and is fixed in vice magnet steel keeps away from the magnetic conduction board of one side of yoke, the magnetic conduction board will the interior circumference side pressure of vibrating diaphragm is located on the vice magnet steel, the magnetic conduction board butt in the main magnet steel, the magnetic conduction board include the magnetic conduction board body and by the step of acceping that the periphery of magnetic conduction board body caves in and forms, the laminating of the interior circumference side of vibrating diaphragm is fixed and accept in the step of acceping, the interior circumference side of vibrating diaphragm is close to one side of yoke with the magnetic conduction board body is close to one side of yoke flushes.

2. The sound production device as claimed in claim 1, wherein the magnetic conductive plate is attached to a side of the main magnetic steel away from the yoke, and the magnetic conductive plate presses an inner peripheral side of the diaphragm against the main magnetic steel.

3. The sounding device according to claim 1, wherein the diaphragm includes a first annular flange portion, a second annular flange portion surrounding the first annular flange portion and spaced apart from each other, a first vibrating portion extending from an outer periphery of the first annular flange portion to the second annular flange portion, a second vibrating portion extending from an inner periphery of the second annular flange portion to the first annular flange portion, a first fixing portion extending from an inner periphery of the first annular flange portion to the first annular flange portion, a second fixing portion extending from an outer periphery of the second annular flange portion to the second annular flange portion, and a spherical top portion covering a side of the first vibrating portion close to the yoke and a side of the second vibrating portion close to the yoke, respectively, the first fixing portion is fixed to the receiving step, and the second fixing portion is fixed to the frame; the first vibrating portion is connected to the second vibrating portion.

4. The sounding device according to claim 3, wherein the first flange portion is an arc-shaped structure recessed away from the yoke, and the second flange portion is an arc-shaped structure recessed toward the yoke.

5. The sounder device according to claim 3, wherein the vibration system further comprises an elastic support member and a skeleton, the elastic support member and the skeleton are annular and are arranged around the magnetic circuit system at intervals, and the outer peripheral side of the elastic support member is fixed to the basin frame; the skeleton is including being annular skeleton body and by the skeleton body to the skeleton fixed part that the magnetic gap extends, the ball top with the inner periphery of elastic support subassembly is fixed in respectively the relative both ends of skeleton body, the skeleton fixed part is fixed in the voice coil loudspeaker voice coil.

6. The sound production device according to claim 1, wherein the main magnetic steel comprises an upper main magnetic steel, a main pole core and a lower main magnetic steel, which are sequentially stacked along the vibration direction of the diaphragm, and the lower main magnetic steel is fixed to the yoke; the auxiliary magnetic steel comprises upper auxiliary magnetic steel, an auxiliary pole core and lower auxiliary magnetic steel which are sequentially stacked along the vibration direction of the vibrating diaphragm, and the lower auxiliary magnetic steel is fixed on the magnetic yoke.

7. The sound production device of claim 6, wherein the secondary magnetic steel comprises two magnetic steels respectively located at two opposite sides of the primary magnetic steel.

8. The sounding device according to claim 6, wherein along the vibration direction of the diaphragm, the projection of the upper main magnetic steel to the yoke, the projection of the main pole core to the yoke, and the projection of the lower main magnetic steel to the yoke completely coincide; along the vibration direction of the vibrating diaphragm, the projection of the upper auxiliary magnetic steel to the magnetic yoke, the projection of the auxiliary pole core to the magnetic yoke and the projection of the lower auxiliary magnetic steel to the magnetic yoke are completely overlapped.

9. The sound production device as claimed in claim 8, wherein a side surface of the upper secondary magnetic steel facing away from the yoke is flush with a side surface of the upper primary magnetic steel facing away from the yoke.