CN212785822U

CN212785822U - Sounding device

Info

Publication number: CN212785822U
Application number: CN202021309304.3U
Authority: CN
Inventors: 严绪东; 邵涛; 顾小江
Original assignee: AAC Technologies Pte Ltd
Current assignee: AAC Technologies Pte Ltd
Priority date: 2020-07-06
Filing date: 2020-07-06
Publication date: 2021-03-23
Anticipated expiration: 2030-07-06
Also published as: WO2022006977A1

Abstract

The utility model relates to an electroacoustic conversion field especially relates to a sounding device. In the sound production device, the magnetic circuit system comprises a magnetic bowl fixed on the basin frame and a magnetic steel unit fixed on the magnetic bowl, the magnetic bowl comprises a magnetic bowl bottom wall used for fixing the magnetic steel unit and a magnetic bowl side wall surrounding the magnetic steel unit, the magnetic bowl side wall and the magnetic steel unit are arranged at intervals to form a magnetic gap, the magnetic steel unit comprises first magnetic steel, a pole core and second magnetic steel which are sequentially stacked on the magnetic bowl bottom wall along the vibration direction, one side of the magnetic bowl side wall far away from the magnetic bowl bottom wall is the same as one side of the second magnetic steel far away from the pole core along the vibration direction relative to the height of the magnetic bowl bottom wall, through the mode, the height of the magnetic gap is increased, the voice coil is completely positioned in the magnetic gap, the magnetic driving force is favorably increased, the magnetic field of the magnetic steel unit from the bottom to the top of the magnetic steel unit along the whole height direction is utilized, and, the acoustic performance of the sounding device is improved.

Description

Sounding device

[ technical field ] A method for producing a semiconductor device

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

[ background of the invention ]

With the development of science and technology, more and more electronic devices are built in with sounding devices. Generally, the sound production device can provide a uniform magnetic field through magnetic steel, so that a voice coil which is electrified with alternating current vibrates in the uniform magnetic field, and the voice coil drives a vibrating diaphragm to vibrate so as to make the sound production device produce sound.

The sounder generally comprises a basin frame, a vibration system fixed on the basin frame and a magnetic circuit system with a magnetic gap, wherein the magnetic circuit system drives the vibration system to vibrate and sound, in the sounder in the prior art, the magnetic circuit system generally utilizes a magnetic field cutting voice coil which is strung out from the bottom of a magnetic steel unit to generate Lorentz force to drive, the magnetic field at the top of the magnetic steel unit is not utilized, and the electromagnetic utilization efficiency is low.

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

[ summary of the invention ]

An object of the utility model is to provide a sound production device solves among the prior art technical problem that magnetic circuit's electromagnetism utilization efficiency is low among the sound production device.

The technical scheme of the utility model as follows: the utility model provides a sounder spare, its include the basin frame, support in the vibration system and the drive of basin frame the magnetic circuit of vibration system vibration sound production, magnetic circuit has the magnetic gap, vibration system locates including inserting voice coil loudspeaker voice coil in the magnetic gap, magnetic circuit is including being fixed in the magnetism bowl of basin frame and being fixed in the magnet steel unit of magnetism bowl, the magnetism bowl is including being used for fixing the magnetism bowl diapire of magnet steel unit and by the edge of magnetism bowl diapire is to keeping away from the magnetism bowl diapire direction is buckled and is extended and encircle the magnetism bowl lateral wall that the magnet steel unit set up, magnetism bowl lateral wall with magnet steel unit interval sets up and forms the magnetic gap, the magnet steel unit includes the edge the vibration direction of vibration system is folded in proper order and is located first magnet steel, pole piece and the second magnet steel of magnetism bowl diapire, the magnetism bowl lateral wall is kept away from one side of magnetism bowl diapire is followed the vibration direction is relative the height of magnetism bowl diapire with the height of magnetism bowl diap And one side of the two magnetic steels, which is far away from the pole core, is opposite to the bottom wall of the magnetic bowl along the vibration direction and has the same height.

Preferably, the basin stand comprises a bottom plate, an outer wall and an inner wall, wherein the outer wall extends from the outer periphery of the bottom plate in a bending mode, the inner wall extends from the inner periphery of the bottom plate in a bending mode, the outer wall is arranged around the inner wall and is spaced from the inner wall, and a first accommodating space for accommodating the magnetic circuit system is enclosed by the inner wall.

Preferably, the basin stand further comprises a plurality of steps which are bent and extended from one side of the inner wall far away from the bottom plate to the first accommodating space, and the side wall of the magnetic bowl is provided with a fracture which penetrates through the side wall of the magnetic bowl and is matched with the steps.

Preferably, the magnetism bowl lateral wall is kept away from one side of magnetism bowl diapire is relative along the vibration direction the height of magnetism bowl diapire is greater than the inner wall is kept away from bottom plate one side is relative along the vibration direction the height of magnetism bowl diapire, the fracture is followed the magnetism bowl lateral wall is kept away from one side of magnetism bowl diapire begins to be followed the vibration direction extends, the extension length of fracture is less than the magnetism bowl lateral wall is followed the vibration direction is relative the height of magnetism bowl diapire, the step with the fracture is close to the one end of magnetism bowl diapire offsets.

Preferably, vibration system is still located including the lid the basin frame just is fixed in the basin frame is kept away from the vibrating diaphragm and the connection of magnetism bowl diapire one side the vibrating diaphragm with the voice coil loudspeaker voice coil skeleton of voice coil loudspeaker voice coil, the voice coil loudspeaker voice coil skeleton is located including the skeleton body that is the cavity tubbiness and subsides reinforcing layer on the skeleton body, the voice coil loudspeaker voice coil is around locating the skeleton body, the reinforcing layer is located the voice coil loudspeaker voice coil with between the vibrating diaphragm.

Preferably, the voice coil bobbin further includes a leakage hole penetrating through both the reinforcement layer and the bobbin body.

Preferably, vibration system still including be fixed in the basin frame and with the supplementary vibrating diaphragm that the vibrating diaphragm interval set up and connecting the vibrating diaphragm with the skeleton of supplementary vibrating diaphragm, the skeleton is located the magnetism bowl lateral wall is kept away from one side of voice coil loudspeaker voice coil skeleton and is encircleed the magnetism bowl lateral wall, the skeleton with magnetism bowl lateral wall interval sets up.

Preferably, the skeleton include with the relative annular bottom plate of magnetism bowl lateral wall and be fixed in the annular bottom plate is kept away from the skeleton main part of magnetism bowl diapire one side, the annular bottom plate connect in supplementary vibrating diaphragm, the skeleton main part is kept away from one side of annular bottom plate connect in the vibrating diaphragm.

Preferably, the diaphragm includes a dome connected to the voice coil bobbin and the bobbin at the same time, and a folded ring surrounding the dome and fixedly connected to the dome, and the folded ring includes a first fixing portion fixedly connected to the frame, a second fixing portion fixedly connected to the dome, and a first folded ring portion connecting the first fixing portion and the second fixing portion;

the auxiliary vibrating diaphragm comprises a third fixing part fixedly connected with the basin frame, a fourth fixing part fixedly connected with the annular bottom plate and a second flange part connected with the third fixing part and the fourth fixing part.

Preferably, the vibration system further includes a flexible circuit board fixedly connected to the bobbin main body and electrically connected to the voice coil.

The beneficial effects of the utility model reside in that: in the sound generating device of the present invention, the magnetic circuit system comprises a magnetic bowl fixed on the frame and a magnetic steel unit fixed on the magnetic bowl, the magnetic bowl comprises a magnetic bowl bottom wall for fixing the magnetic steel unit and a magnetic bowl side wall bent and extended from the edge of the magnetic bowl bottom wall to the direction away from the magnetic bowl bottom wall, the magnetic bowl side wall and the magnetic steel unit are arranged at an interval and form the magnetic gap, the magnetic steel unit comprises a first magnetic steel, a pole core and a second magnetic steel sequentially stacked on the magnetic bowl bottom wall along the vibration direction of the vibration system, one side of the magnetic bowl side wall away from the magnetic bowl bottom wall is the same as one side of the second magnetic steel away from the pole core along the height of the vibration direction relative to the magnetic bowl bottom wall, by the above method, the height of the magnetic gap is increased, the voice coil is completely located in the magnetic gap, and is beneficial to increase the magnetic driving force, the magnetic field of the magnetic steel unit along the whole height direction from the bottom to the top of the magnetic steel unit is utilized, so that the electromagnetic utilization efficiency of the magnetic circuit system is improved, and the acoustic performance of the sound production device is improved.

[ description of the drawings ]

Fig. 1 is a perspective view of the sound production device of the present invention;

FIG. 2 is a cross-sectional view A-A of the sound device of FIG. 1;

FIG. 3 is an exploded view of the sound device of FIG. 1;

FIG. 4 is a drawing showing the magnetic bowl and the magnetic steel unit in the sound generating device of the present invention

FIG. 5 is a view showing the magnetic circuit system and the front view of the frame;

FIG. 6 is an exploded view of the magnetic circuit system and the back view of the frame of the sound generator of the present invention;

fig. 7 is a matching diagram of the voice coil and the voice coil bobbin in the sound generating device of the present invention.

[ detailed description ] embodiments

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1 to 6, an embodiment of 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 magnetic gap 30. The vibration system 2 and the magnetic circuit system 3 are respectively supported on the basin frame 1, and the magnetic circuit system 3 drives the vibration system 2 to vibrate and sound.

The basin stand 1 is including being annular diapire 11, by outer wall 12 that 11 outer peripheral edges of diapire buckle and extend and by inner wall 13 that 11 inner peripheral edges of diapire buckle and extend, outer wall 12 encircles inner wall 13 sets up and separates each other, and inner wall 13 encloses into the first accommodation space 101 that is used for holding magnetic circuit 3, and first accommodation space 101 is for passing through the chamber.

The magnetic circuit system 3 is fixed in the first accommodating space 101, the magnetic circuit system 3 comprises a magnetic bowl 31 fixed on the inner wall 13 and a magnetic steel unit 32 fixed on the magnetic bowl 31, the magnetic bowl 31 comprises a magnetic bowl bottom wall 311 and a magnetic bowl side wall 312 bent and extended from the edge of the magnetic bowl bottom wall 311 to the direction far away from the magnetic bowl bottom wall 311, the magnetic bowl bottom wall 311 is used for fixing the magnetic steel unit 32, the magnetic bowl side wall 312 and the magnetic steel unit 32 are arranged at intervals to form the magnetic gap 30, the magnetic steel unit 32 comprises a first magnetic steel 321, a pole core 322 and a second magnetic steel 323 which are sequentially stacked on the bottom wall 311 of the magnetic bowl along the vibration direction of the vibration system 2, the side of the magnetic bowl side wall 312 far away from the magnetic bowl bottom wall 311 is the same as the height of the second magnetic steel 323 far away from the pole core 322 relative to the magnetic bowl bottom wall 311 along the vibration direction.

In an alternative embodiment, referring to fig. 5 and 6, the magnetic bowl 31 is fixed on the inner wall 13 through a magnetic bowl side wall 312, the inner wall 13 is disposed around the magnetic bowl side wall 312, and the inner wall 13 further includes a plurality of steps 131 extending from a side of the inner wall 13 away from the bottom plate 11 into the first accommodating space 101, a height of a side of the magnetic bowl side wall 312 away from the magnetic bowl bottom wall 311 along the vibration direction relative to the magnetic bowl bottom wall 311 is greater than a height of a side of the inner wall 13 away from the bottom plate 11 along the vibration direction relative to the magnetic bowl bottom wall 311, the magnetic bowl side wall 312 is provided with a fracture 3121 penetrating therethrough and cooperating with the steps 131, the fracture 3121 extends from a side of the magnetic bowl side wall 312 away from the magnetic bowl bottom wall 311 along the vibration direction, an extension length of the fracture 3121 is less than a height of the magnetic bowl side wall 312 along the vibration direction relative to the magnetic bowl bottom wall 311, the step 131 abuts against one end of the fracture 3121 close to the magnetic bowl bottom wall 311. A plurality of steps 131 are provided at intervals along the circumferential direction of the inner wall 13.

In this embodiment, please refer to fig. 2, fig. 3 and fig. 7, the vibration system 2 includes a diaphragm 21, a voice coil 22, a voice coil bobbin 23, an auxiliary diaphragm 24 and a bobbin 25, the diaphragm 21 is fixed on one side of the outer wall 12 of the basin frame 1 away from the bottom plate 11, the voice coil bobbin 23 is disposed between the voice coil 22 and the diaphragm 21 and is connected to both the voice coil 22 and the diaphragm 21, one end of the auxiliary diaphragm 24 is fixed on the outer wall 12, the auxiliary diaphragm 24 and the diaphragm 21 are disposed at an interval, the auxiliary diaphragm 24 is located between the diaphragm 21 and the bottom plate 11 in the vibration direction, the other end of the auxiliary diaphragm 24 is fixed on the bobbin 25, and the bobbin 25 is used for connecting the diaphragm 21 and the auxiliary.

In the embodiment, the voice coil 22 is located in the magnetic gap 30, so as to generate an electromagnetic field with the magnetic circuit system 3, generate a magnetic driving force, and drive the voice coil 22 and the voice coil bobbin 23 directly connected to the voice coil 22 to reciprocate together, so as to make the diaphragm 21 vibrate reciprocally to generate sound. The projection of the magnetic steel unit 32 along the direction perpendicular to the vibration direction completely falls into the magnetic bowl side wall 312, the height of the magnetic gap 30 in the vibration direction is increased, the voice coil 22 is completely positioned in the magnetic gap 30, the generated magnetic driving force is larger, the magnetic field of the magnetic steel unit 32 along the whole height direction from the bottom to the top is utilized, the electromagnetic utilization efficiency of the magnetic circuit system 3 is improved, and the acoustic performance of the sound production device 100 is improved.

Further, voice coil framework 23 is including being the skeleton body 231 of hollow tubbiness and pasting and locating strengthening layer 232 on the skeleton body 231, voice coil 22 is direct around locating on the skeleton body 231, strengthening layer 232 is located voice coil 22 with between the vibrating diaphragm 21. Further, the stiffening layer 232 is spaced apart from the voice coil 22. In the present embodiment, the outer diameter of the reinforcing layer 232 is smaller than or equal to the outer diameter of the voice coil 22. The arrangement of the above structure, through the reinforcing layer 232 is right the skeleton body 231 is locally reinforced, so that the skeleton body 231 is not easy to deform irreversibly, the reliability of the sound production device 100 is improved, that is, the strength of the skeleton body 231 is enhanced without increasing the outer diameter of the voice coil 22, and thus the width of the magnetic gap 30 is not affected, the magnetic field of the magnetic circuit system 3 is stronger, and the acoustic performance of the sound production device 100 is further improved. In the voice coil bobbin 23, the bobbin body 231 is made of a polyimide material, i.e., an adhesive tape. The reinforcing layer 232 is made of a metal material, for example, the reinforcing layer 232 is made of aluminum paper. When the framework body 231 is made of the material, the resilience is good, the deformation restoring force is strong, the thickness is small, and the width space of the magnetic gap 30 is effectively saved. The reinforcing layer 232 made of aluminum paper is light and high in strength, and the strength of the framework body 231 is effectively improved. The cross section of the skeleton body 231 is circular. The voice coil bobbin 23 further includes a leakage hole 233 penetrating the stiffening layer 232 and the bobbin body 231 at the same time.

The skeleton 25 interval encircles magnetism bowl lateral wall 312 sets up, and the skeleton 25 is along perpendicular the projection of vibration direction with magnetism bowl lateral wall 312 and voice coil skeleton 23 all partly overlaps. The framework 25 includes an annular bottom plate 251 opposite to the magnetic bowl side wall 312 and a framework main body 252 fixed on one side of the annular bottom plate 251 away from the magnetic bowl bottom wall 311, the annular bottom plate 251 is connected to the auxiliary diaphragm 24, and one side of the framework main body 252 away from the annular bottom plate 251 is connected to the diaphragm 21. Further, the vibration system 2 further includes a flexible circuit board 26 disposed on the bobbin main body 252, and the flexible circuit board 26 is electrically connected to the voice coil 22.

Further, the diaphragm 21 includes a dome 211 connected to both the voice coil bobbin 23 and the bobbin 25, and a corrugated rim 212 surrounding the dome 211 and fixedly connected to the dome 211, where the corrugated rim 212 includes a first fixing portion 2121 fixedly connected to one side of the outer wall 12 away from the bottom plate 11, a second fixing portion 2122 fixedly connected to the dome 211, and a first corrugated rim portion 2123 connecting the first fixing portion 2121 and the second fixing portion 2122; the auxiliary diaphragm 24 includes a third fixing portion 241 fixedly connected to the outer wall 12, a fourth fixing portion 242 fixedly connected to the annular base plate 251, and a second flange portion 243 connecting the third fixing portion 241 and the fourth fixing portion 242.

In the present embodiment, the auxiliary diaphragm 24 is connected to the diaphragm 21 through the skeleton 25, and performs reciprocating vibration together with the diaphragm 21.

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. The utility model provides a sounder spare, its include the basin frame, support in the vibration system and the drive of basin frame the magnetic circuit of vibration system vibration sound production, magnetic circuit has the magnetic gap, vibration system locates including inserting voice coil loudspeaker voice coil in the magnetic gap, a serial communication port, magnetic circuit is including being fixed in the magnetism bowl of basin frame and being fixed in the magnet steel unit of magnetism bowl, the magnetism bowl is including being used for fixing the magnetism bowl diapire of magnet steel unit and by the edge of magnetism bowl diapire is to keeping away from magnetism bowl diapire direction is buckled and is extended and is encircleed the magnetism bowl lateral wall that magnet steel unit set up, magnetism bowl lateral wall with magnet steel unit interval sets up and forms the magnetic gap, the magnet steel unit includes the edge the vibration direction of vibration system is folded in proper order and is located first magnet steel, utmost point core and second magnet steel of magnetism bowl diapire, the magnetism bowl lateral wall is kept away from one side of magnetism bowl diapire is followed the vibration direction is relative the magnetism bowl of diapire The height of the second magnetic steel is the same as that of one side of the second magnetic steel, which is far away from the pole core, of the magnetic bowl bottom wall along the vibration direction.

2. The sounder device according to claim 1, wherein the tub support includes a bottom plate, an outer wall extending from an outer periphery of the bottom plate, and an inner wall extending from an inner periphery of the bottom plate, the outer wall being disposed around the inner wall and spaced apart from each other, the inner wall enclosing a first receiving space for receiving the magnetic circuit system.

3. The sounding device according to claim 2, wherein the frame further comprises a plurality of steps extending from a side of the inner wall away from the bottom plate to the first accommodating space, and the side wall of the magnetic bowl is provided with a fracture penetrating through the side wall and matching with the steps.

4. The sounder device according to claim 3, wherein a side of the magnetic bowl side wall, which is away from the magnetic bowl bottom wall, is higher than the inner wall, which is away from the bottom plate, is higher than the magnetic bowl bottom wall, which is away from the bottom plate, in the vibration direction, the fracture extends in the vibration direction from the side of the magnetic bowl side wall, which is away from the magnetic bowl bottom wall, the fracture extends in a length which is smaller than the height of the magnetic bowl side wall, which is away from the magnetic bowl bottom wall in the vibration direction, and the step abuts against one end, which is close to the magnetic bowl bottom wall, of the fracture.

5. The sound production device of claim 1, wherein the vibration system further comprises a cover disposed on the frame and fixed to the frame, the frame is far away from the diaphragm on one side of the bottom wall of the magnetic bowl and connected to the diaphragm and the voice coil framework of the voice coil, the voice coil framework comprises a hollow barrel-shaped framework body and a reinforcing layer disposed on the framework body, the voice coil is wound on the framework body, and the reinforcing layer is disposed between the voice coil and the diaphragm.

6. The sounding device of claim 5, wherein the voice coil bobbin further comprises a leak hole extending through both the stiffening layer and the bobbin body.

7. The sounding device according to claim 5, wherein the vibration system further comprises an auxiliary diaphragm fixed to the frame and spaced from the diaphragm, and a bobbin connecting the diaphragm and the auxiliary diaphragm, the bobbin being located on a side of the magnetic bowl sidewall away from the voice coil bobbin and surrounding the magnetic bowl sidewall, the bobbin being spaced from the magnetic bowl sidewall.

8. The sounding device according to claim 7, wherein the frame comprises an annular bottom plate opposite to the side wall of the magnetic bowl and a frame body fixed to a side of the annular bottom plate away from the bottom wall of the magnetic bowl, the annular bottom plate is connected to the auxiliary diaphragm, and a side of the frame body away from the annular bottom plate is connected to the diaphragm.

9. The sounding device according to claim 8, wherein the diaphragm comprises a dome connected to both the voice coil bobbin and the bobbin, and a corrugated rim surrounding the dome and fixedly connected to the dome, the corrugated rim comprising a first fixing portion fixedly connected to the frame, a second fixing portion fixedly connected to the dome, and a first corrugated rim portion connecting the first fixing portion and the second fixing portion;

10. The sounder device according to claim 8, wherein the vibration system further comprises a flexible circuit board fixedly attached to the bobbin body and electrically connected to the voice coil.