WO2021128332A1

WO2021128332A1 - Sound production device

Info

Publication number: WO2021128332A1
Application number: PCT/CN2019/129403
Authority: WO
Inventors: 宋威; 张帆; 金鑫
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声科技(新加坡)有限公司
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2021-07-01

Abstract

Provided in the present invention is a sound production device, comprising a basin frame, a vibration system, and a magnetic circuit system, the vibration system comprising an annular upper diaphragm, a lower diaphragm, a voice coil, an upper framework, a lower framework, and an isolation diaphragm, the upper diaphragm being fixed to the basin frame and together with the basin frame enclosing an accommodating space, the side thereof furthest from the accommodating space being in communication with the outside and acting as an upper front cavity for the sound production of the upper diaphragm, the upper diaphragm being arranged around the magnetic circuit system at an interval; the lower diaphragm is arranged around the magnetic circuit system at an interval, the outer peripheral side of the lower diaphragm being fixed to the basin frame; the upper framework is respectively connected to the upper diaphragm and the voice coil; the lower framework is respectively connected to the lower diaphragm and the voice coil; the outer peripheral side of the isolation diaphragm is connected to the basin frame, and the inner peripheral side thereof is connected to the lower framework; the lower diaphragm, the lower framework, the isolation diaphragm, and the basin frame collectively divide the accommodating space into a lower front cavity used for the sound production of the lower diaphragm and a rear cavity shared by the upper diaphragm and the lower diaphragm. Compared to the prior art, the sound production device of the present invention has higher acoustic loudness and better acoustic performance.

Description

Sound device

Technical field

The invention relates to the field of electro-acoustic conversion, in particular to a sound-producing device applied to electronic sound box products.

Background technique

The related art sound generating device includes a basin frame, a vibration system fixed to the basin frame, and a magnetic circuit system with a magnetic gap. The magnetic circuit system drives the vibration system to vibrate and emit sound. The vibration system includes a frame fixed to the basin. The frame is used for vibrating and producing the diaphragm, the dome of the diaphragm is attached to the skeleton on the side close to the magnetic circuit system, and the sound inserted in the magnetic gap and connected with the skeleton to drive the diaphragm to vibrate ring.

technical problem

However, in the related art sound generating device, the vibration system and the magnetic circuit system are stacked up and down. In the sound generating device of the same height, the structure of the magnetic circuit system is limited, thereby limiting the BL value of the magnetic field; The sounding device has only one diaphragm structure, and the effective vibration area (SD) of the diaphragm is small, thereby limiting the loudness of the sounding device.

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

Technical solutions

The purpose of the present invention is to provide a sounding device with greater loudness and better acoustic performance.

In order to achieve the above objective, the present invention provides a sound generating device, which includes a basin frame, a vibration system respectively supported on the basin frame, and a magnetic circuit system that drives the vibration system to vibrate and produce sound, the magnetic circuit system having a magnetic gap , The vibration system includes:

The upper diaphragm, the upper diaphragm is ring-shaped and arranged around the magnetic circuit system, the upper diaphragm is fixed to the basin frame, and the upper diaphragm and the basin frame jointly enclose a receiving space, so The side of the upper diaphragm away from the receiving space communicates with the outside and serves as an upper front cavity for the upper diaphragm to emit sound;

The lower diaphragm, the lower diaphragm is ring-shaped and is arranged at intervals around the magnetic circuit system, the lower diaphragm is opposed to the upper diaphragm and is located in the containing space, and the outer periphery of the lower diaphragm Side fixed to the basin frame;

A voice coil, the voice coil is inserted in the magnetic gap to drive the upper diaphragm and the lower diaphragm to vibrate and produce sound;

An upper skeleton, the upper skeleton is located in the accommodating space, the upper skeleton is ring-shaped and is arranged at intervals around the magnetic circuit system, and the upper skeleton is respectively connected with the upper diaphragm and the voice coil;

A lower frame, the lower frame is located in the containing space, the lower frame is ring-shaped and is arranged at intervals around the magnetic circuit system, and the lower frame is respectively connected with the lower diaphragm and the voice coil, so The voice coil simultaneously drives the upper frame and the lower frame to drive the upper diaphragm and the lower diaphragm to vibrate simultaneously; and,

The isolation diaphragm is ring-shaped and is arranged at intervals around the magnetic circuit system, the isolation diaphragm is located in the containing space and the isolation diaphragm is arranged at intervals between the upper diaphragm and the Between the lower diaphragms, the outer circumferential side of the isolation diaphragm is connected to the basin frame, and the inner circumferential side of the isolation diaphragm is connected to the lower frame;

The lower diaphragm, the lower frame, the isolation diaphragm, and the basin frame jointly divide the housing space into a lower front cavity for the lower diaphragm to emit sound, and a lower front cavity for the upper diaphragm and The rear cavity shared by the lower diaphragm; the basin frame is provided with a sound hole passing through it, and the sound hole connects the lower front cavity with the outside.

Preferably, the upper frame includes an upper frame body arranged at intervals on the outer peripheral side of the magnetic circuit system, an upper frame extension wall bent from the upper frame body to the magnetic circuit system and extending into the magnetic gap, and An arc-shaped upper frame connecting wall bent and extended by the upper frame extension wall; the upper frame body is connected to the upper diaphragm; the voice coil is in a rectangular structure with rounded corners, and the upper frame is connected The wall is attached to the rounded corners on the outer peripheral side of the voice coil.

Preferably, the upper frame body includes two and are respectively arranged on opposite sides of the voice coil at intervals, the opposite ends of each upper frame body are respectively bent to form two upper frame extension walls, each Each of the upper frame extension walls is bent and extended to form the upper frame connecting wall, and the four upper frame connecting walls are respectively arranged at the four round corners of the voice coil.

Preferably, the upper skeleton body includes an upper skeleton body wall and an upper reinforcement wall bent and extended from an end of the upper skeleton body wall close to the upper diaphragm in a direction perpendicular to the vibration direction of the upper diaphragm; The upper frame extension wall is bent and extended by the upper frame body wall, and the upper reinforcement wall is connected with the upper diaphragm.

Preferably, the lower frame includes a ring-shaped lower frame body arranged around the magnetic circuit system at intervals, and a lower frame bracket that is bent from the lower frame body to the magnetic circuit system and extends into the magnetic gap And an arc-shaped lower frame connecting wall extending from the lower frame bracket; the end of the lower frame body close to the upper diaphragm is connected to the side of the isolation diaphragm away from the upper diaphragm, The end of the lower frame body away from the upper diaphragm is connected to the side of the lower diaphragm close to the upper diaphragm, and the lower frame connecting wall is attached to the rounded corners on the outer peripheral side of the voice coil. It is arranged at intervals with the connecting wall of the upper skeleton.

Preferably, the lower frame brackets include four, the lower frame connecting walls include four, each of the lower frame brackets is bent and extended to form one of the lower frame connecting walls, and the four lower frame connecting walls They are respectively arranged at the four rounded corners of the voice coil.

Preferably, the lower skeleton body includes a lower skeleton body wall, a first lower reinforcement wall bent and extended from an end of the lower skeleton body wall close to the isolation diaphragm in a direction perpendicular to the vibration direction of the upper diaphragm, And a second lower reinforcement wall bent and extended from an end of the lower frame body wall close to the lower diaphragm in a direction perpendicular to the vibration direction, the first lower reinforcement wall and the second lower reinforcement wall are respectively located The two different sides of the lower frame body wall; the first lower reinforcement wall is connected to the isolation diaphragm; the second lower reinforcement wall is connected to the lower diaphragm; the lower frame support is connected to the lower diaphragm; The wall of the lower frame body is bent and extended.

Preferably, the upper diaphragm includes a first upper folding ring portion each in a ring shape, a second upper folding ring portion in a ring shape surrounding the first upper folding ring portion and spaced apart from each other, and the The first upper vibrating portion bent and extended from the outer peripheral side of the upper folding ring portion, the first upper fixing portion bent and extended from the inner peripheral side of the first upper folding ring portion, the first upper fixing portion bent and extended by the second upper folding ring portion The second upper fixed portion bent and extended on the outer peripheral side, the second upper vibrating portion bent and extended from the inner peripheral side of the second upper folded ring portion, and a cover fixed to the first upper vibrating portion and the The second upper vibrating part is away from the top of the upper ball on the side of the lower diaphragm, the first upper fixing part is fixed to the magnetic circuit system, and the second upper fixing part is fixed to the basin frame; The frame is connected to the first upper vibrating part.

Preferably, the top of the upper ball and the isolation diaphragm are arranged directly opposite each other.

Preferably, the lower diaphragm includes a ring-shaped lower folded ring portion, a lower vibrating portion bent and extended from the inner peripheral side of the lower folded ring portion, and bent and extended from the outer periphery of the lower folded ring portion. The lower fixing portion and the cover are fixed to the ring-shaped lower spherical top on the side of the lower vibrating portion close to the upper diaphragm; the lower spherical top is connected to the lower skeleton, and the lower fixing portion is fixed to The basin frame.

Preferably, the isolation diaphragm and the top of the lower sphere are arranged directly opposite each other, and the width of the isolation diaphragm in a vibration direction perpendicular to the upper diaphragm is smaller than the width of the top of the lower sphere.

Preferably, the second upper folding ring portion and the lower folding ring portion are arranged directly opposite to each other.

Preferably, the second upper folding ring portion has an arc-shaped structure formed by recessing in a direction away from the lower folding ring portion, and the lower folding ring portion has an arc formed by recessing in a direction away from the second upper folding ring portion.形结构。 Shape structure.

Preferably, the basin frame includes a bottom wall that fixedly supports the magnetic circuit system, an annular side wall bent and extended from the periphery of the bottom wall, and a side wall extending from the side wall in a direction close to the magnetic circuit system The outer peripheral side of the lower diaphragm is fixed to the side wall and the lower diaphragm is spaced from the bottom wall, and the outer peripheral side of the upper diaphragm is fixed to the side One end of the wall away from the bottom wall, the outer peripheral side of the isolation diaphragm is fixed to the support wall, and the sound hole is provided through the side wall and is located on a side of the support wall close to the bottom wall.

Preferably, the magnetic circuit system includes a yoke supported on the bottom wall, a main magnet fixed to the yoke, and an auxiliary magnet surrounding the main magnet, the auxiliary magnet and the The main magnetic steel is spaced to form the magnetic gap; the auxiliary magnetic steel is provided with a relief opening, and both the upper frame and the lower frame extend into the magnetic gap through the relief opening and are connected to the voice coil. Connection; the first upper fixing portion is fixed to the side of the secondary magnetic steel away from the yoke.

Preferably, the auxiliary magnet includes a first auxiliary magnet arranged at intervals on opposite sides of the main magnet and a second auxiliary magnet arranged at intervals on the other opposite sides of the main magnet. The first auxiliary magnetic steel and the second auxiliary magnetic steel are spaced apart to form the relief opening.

Preferably, the magnetic circuit system further includes a magnetic conductive plate covering the secondary magnetic steel, and the magnetic conductive plate presses the first upper fixing part on the secondary magnetic steel.

Preferably, the magnetic conductive plate abuts against the main magnetic steel.

Preferably, the end of the secondary magnetic steel away from the yoke is in a chamfered structure, the first upper folding ring portion is set right at the position of the chamfering structure, and the first upper folding ring portion is facing away from The arc structure formed by the direction depression of the magnetic circuit system.

Beneficial effect

Compared with the related art, the sound device of the present invention designs the vibration system and the magnetic circuit system into a parallel structure from a stacked structure, that is, the vibration system is arranged around the magnetic circuit system, so that the vibration system at the same height In the sound generating device, the magnetic circuit system can effectively utilize the height space of the sound generating device and be designed to be thicker, thereby effectively increasing the magnetic field BL value, making the magnetic circuit system greater driving force, improving the vibration performance of the vibration system, and greatly The acoustic performance of the vibration system is greatly improved; at the same time, the high vibration direction of the vibration system is counted as a double-diaphragm structure of the upper and lower diaphragms, so that the upper and lower diaphragms pass through the upper front cavity and the lower front cavity respectively. The cavity emits sound and shares the same rear cavity. This structure effectively increases the effective vibration area (SD) of the diaphragm of the vibration system by making full use of the height space of the sounding device, and improves the sounding loudness of the sounding device, that is, the vibration of the sounding device When the effective vibration area (SD) of the membrane is the same, the size of the sound generating device can be made smaller.

Description of the drawings

In order to explain the technical solutions in the embodiments of the present invention more clearly, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative work, other drawings can be obtained based on these drawings, among which:

Figure 1 is a schematic diagram of the three-dimensional structure of the sound generating device of the present invention;

2 is an exploded view of a part of the three-dimensional structure of the sound generating device of the present invention;

Figure 3 is a cross-sectional view taken along line A-A in Figure 1;

Figure 4 is an enlarged view of the part shown in Figure 3 B;

5 is a schematic diagram of the upper skeleton structure of the sound generating device of the present invention;

6 is a schematic diagram of the lower skeleton structure of the sound generating device of the present invention;

7 is a schematic diagram of the assembled three-dimensional structure of the upper frame, the lower frame and the voice coil of the sound generating device of the present invention;

8 is a schematic diagram of the assembled three-dimensional structure of the upper frame, voice coil and upper diaphragm of the sound generating device of the present invention;

9 is a schematic diagram of the assembled three-dimensional structure of the lower frame, voice coil, isolation diaphragm, and lower diaphragm of the sound generating device of the present invention;

Fig. 10 is a partial structural diagram of the magnetic circuit system of the sound generating device of the present invention.

Embodiments of the present invention

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

1-10, the present invention provides a sound generating device 100, which includes a basin frame 1, a vibration system 2 and a magnetic circuit system 3 respectively supported on the basin frame 1, and an upper cover 4, the magnetic The circuit system 3 has a magnetic gap 30, and the magnetic circuit system 3 drives the vibration system 2 to vibrate and produce sound.

The vibration system 2 includes an upper diaphragm 21, a lower diaphragm 22, a voice coil 23, an upper frame 24, a lower frame 25 and an isolation diaphragm 26. Wherein, the upper diaphragm 21, the isolation diaphragm 26, and the lower diaphragm 22 are sequentially spaced from top to bottom.

The upper diaphragm 21 has a ring shape and is arranged around the magnetic circuit system 3.

The outer peripheral side of the upper diaphragm 21 is fixed to the side of the basin frame 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. The upper diaphragm 21 and the basin frame 1 jointly enclose a receiving space 10.

The side of the upper diaphragm 21 away from the accommodating space 10 communicates with the outside and serves as an upper front cavity 101 where the upper diaphragm 21 emits sound; specifically, the upper cover plate 4 is fixed to the basin The side of the frame 1 away from the magnetic circuit system 3, the outer peripheral side of the upper diaphragm 21 is clamped and fixed between the basin frame 1 and the upper cover plate 4, and the upper diaphragm 21, The basin frame 1 and the upper cover plate 4 jointly enclose the upper front cavity 101. The upper cover plate 4 is provided with a sounding opening 40 penetrating the upper front cavity. The sounding opening 40 connects the upper front cavity 101 with Connect with the outside world to achieve sound. In this embodiment, the upper diaphragm 21 includes a first upper folding ring portion 211 each in a ring shape, and a second upper folding ring portion 212 that surrounds the first upper ring portion 211 and is spaced apart from each other. , The first upper vibrating portion 213 bent and extended from the outer peripheral side of the first upper folding ring portion 211, the first upper fixing portion 214 bent and extended from the inner peripheral side of the first upper folding ring portion 211, The second upper fixing portion 215 bent and extended from the outer peripheral side of the second upper folded ring portion 212, the second upper vibrating portion 216 bent and extended from the inner peripheral side of the second upper folded ring portion 212, and simultaneously The cover is fixed to the upper spherical top 217 on the side of the first upper vibrating portion 213 and the second upper vibrating portion 216 away from the lower diaphragm 22. The first upper fixing portion 214 is fixed to the magnetic circuit system 3, and the second upper fixing portion 215 is sandwiched and fixed between the basin frame 1 and the upper cover 4. The upper frame 24 is connected to the first upper vibrating part 213.

The lower diaphragm 22 has a ring shape and is arranged at intervals around the magnetic circuit system 3.

The lower diaphragm 22 is opposed to the upper diaphragm 21 and is located in the second accommodating space 20. The outer peripheral side of the lower diaphragm 22 is fixed to the frame 1 away from the upper diaphragm 21. One side.

Specifically, the lower diaphragm 22 includes a ring-shaped lower folded ring portion 221, a lower vibrating portion 222 bent and extended from the inner peripheral side of the lower folded ring portion 221, and a lower portion 222 formed by the lower folded ring portion 221. A lower fixing portion 223 extending on the outer periphery and a ring-shaped lower dome 224 covered and fixed on the side of the lower vibrating portion 222 close to the upper diaphragm 21. The lower dome 224 is connected to the lower frame 25, and the lower fixing portion 223 is fixed to the side of the basin frame 1 away from the upper diaphragm 21.

In this embodiment, the second upper folding ring portion 212 and the lower folding ring portion 221 are arranged directly opposite to each other. More preferably, the second upper folding ring portion 212 has an arc-shaped structure that is recessed in a direction away from the lower folding ring portion 221, and the lower folding ring portion 221 is facing away from the second upper folding ring portion 212. The arc structure formed by the direction depression. This structure effectively utilizes the height space of the sound emitting device 100, so that the upper diaphragm 21 and the lower diaphragm 22 have a larger vibration space and better vibration performance.

The voice coil 23 is inserted into the magnetic gap 30 to drive the upper diaphragm 21 and the lower diaphragm 22 to vibrate and produce sound. The above structure forms a double-diaphragm vibration and sound structure, which effectively increases the effective vibration area (SD) of the vibration system 2 and improves the sounding loudness of the sound emitting device, that is, the effective vibration area of the diaphragm of the sound emitting device 100 ( SD) Under the same conditions, the size of the sound emitting device 100 can be made smaller, which is conducive to the development of miniaturization. At the same time, the upper diaphragm 21 and the lower diaphragm 22 are both arranged around the magnetic circuit system 3, breaking the conventional laminated structure design of the vibration system 2 and the magnetic circuit system 3, so that the magnetic circuit system 3 can be fully utilized The height space design of the sound generating device 100 is thicker, which effectively increases the BL value of its magnetic field, thereby improving the driving force to improve the vibration performance of the sound generating device 100 and improve the sound generation performance.

The upper frame 24 is located in the receiving space 10. The upper frame 24 has a ring shape and is arranged at intervals around the magnetic circuit system 3.

The upper frame 24 is connected to the voice coil 23 and the upper diaphragm 21 respectively, and the voice coil 23 drives the upper frame 24 to drive the upper diaphragm 21 to vibrate.

The lower frame 25 is located in the receiving space 10. The lower frame 25 has a ring shape and is arranged at intervals around the magnetic circuit system 3. The lower frame 25 is connected to the lower diaphragm 22, the voice coil 23, and the isolation diaphragm 26, respectively. The voice coil 23 simultaneously drives the upper frame 24 and the lower frame 25 to drive the upper diaphragm 21 and the lower diaphragm 22 to vibrate at the same time, so as to realize a double diaphragm vibration and sound structure.

The isolation diaphragm 26 has a ring shape and is arranged at intervals around the magnetic circuit system 3.

The isolation diaphragm 26 is arranged at intervals between the upper diaphragm 21 and the lower diaphragm 22, the outer peripheral side of the isolation diaphragm 26 is connected to the frame 1, and the inner portion of the isolation diaphragm 26 The peripheral side is connected to the lower frame 25.

More preferably, the upper spherical top 217 and the isolation diaphragm 26 are arranged directly opposite to each other.

More preferably, the isolation diaphragm 26 and the lower spherical top 224 are arranged directly opposite each other, and the width of the isolation diaphragm 26 in the vibration direction perpendicular to the upper diaphragm 21 is smaller than that of the lower spherical top 224. The width. This structural arrangement prevents the excessive width of the isolation diaphragm 26 from causing loss of the effective vibration area SD of the lower diaphragm 22 and affecting the acoustic performance.

The lower diaphragm 22, the lower frame 25, the isolation diaphragm 26, and the basin frame 1 jointly divide the housing space 10 into a lower front cavity 103 for the lower diaphragm 22 to emit sound, and In the rear cavity 102 shared by the upper diaphragm 21 and the lower diaphragm 22. Specifically, the side of the lower diaphragm 22 away from the upper diaphragm 21 communicates with the rear cavity 102 and shares the rear cavity 102 with the upper diaphragm 21. The sound hole 120 connects the lower front cavity 103 with the outside to achieve sound.

In other words, the isolation diaphragm 26 isolates the lower front cavity 103 from the receiving space 10 to avoid acoustic short circuit between the rear cavity 102 and the lower front cavity 103.

The upper frame 24 is connected to the upper diaphragm 21 and the voice coil 23. Specifically, the upper frame 24 is connected to the first upper vibrating part 213.

The lower frame 25 has a ring shape, and the lower frame 25 is connected to the lower diaphragm 22. Specifically, the lower vibrating portion 222 of the lower diaphragm 22 is connected to the lower frame 25.

The inner peripheral side of the isolation diaphragm 26 is connected to the lower frame 25. The outer peripheral side of the isolation diaphragm 26 is fixed to the basin frame 1. At this time, the lower diaphragm 22, the lower frame 25, the isolation diaphragm 26, and the basin frame 1 jointly enclose the lower front cavity 103 for the lower diaphragm 22 to emit sound.

Specifically, the upper skeleton 24 includes an upper skeleton body 241 arranged at intervals on the outer peripheral side of the magnetic circuit system 3, and the upper skeleton body 241 is bent toward the magnetic circuit system 3 and extends into the magnetic gap 30 The upper skeleton extension wall 242 of the upper skeleton extension wall 242 and the arc-shaped upper skeleton connecting wall 243 bent and extended from the upper skeleton extension wall 242.

The upper frame body 241 is connected to the upper diaphragm 21. It is worth mentioning that the structure of the voice coil is not limited. For example, in this embodiment, the voice coil 23 has a rectangular structure with rounded corners, and the upper frame connecting wall 243 is attached to the voice coil. 23 The rounded corners on the outer circumference.

The upper frame body 241 includes two upper frame bodies 241 which are respectively spaced apart on opposite sides of the voice coil 23. The opposite ends of each upper frame body 241 are respectively bent to form two upper frame extension walls 242, Each of the upper frame extension walls 242 is bent and extended to form an upper frame connecting wall 243, that is, a total of four upper frame connecting walls 243 are formed, and the four upper frame connecting walls 243 are respectively arranged on the The four rounded corners of the voice coil 23. The above structure symmetrically supports the voice coil 23, the support is more stable, and the vibration reliability is better.

More preferably, the upper skeleton body 241 includes an upper skeleton body wall 2411, which is bent and extended from an end of the upper skeleton body wall 2411 close to the upper diaphragm 21 in a direction perpendicular to the vibration direction of the upper diaphragm 21. Upper reinforcement wall 2412. The upper frame extension wall 242 is bent and extended from the upper frame body wall 2411.

The upper reinforcing wall 2412 is connected to the upper diaphragm 21, specifically, the upper reinforcing wall 2412 is connected to the upper vibrating portion 213 of the upper diaphragm 21. The upper reinforcing wall 2412 is provided to increase the connection strength between the upper skeleton body 241 and the upper diaphragm 21 by increasing the coupling area, thereby improving the vibration reliability.

The lower frame 25 includes a ring-shaped lower frame body 251 arranged around the magnetic circuit system 3 at intervals, and a frame that is bent from the lower frame body 251 to the magnetic circuit system 3 and extends into the magnetic gap 30. The lower frame bracket 252 and the arc-shaped lower frame connecting wall 253 extending from the lower frame bracket 252 are bent and extended.

The end of the lower frame body 251 close to the upper diaphragm 21 is connected to the side of the isolation diaphragm 26 away from the upper diaphragm 21; the end of the lower frame body 251 away from the upper diaphragm 21 is connected to The lower diaphragm 22 is connected to a side close to the upper diaphragm 21.

The lower frame connecting wall 253 is attached to the rounded corners of the outer circumference of the voice coil 23. The lower frame connecting wall 253 and the upper frame connecting wall 243 are spaced apart. In other words, the voice coil 23 drives the lower frame 25 to vibrate, and the lower frame 25 drives the lower diaphragm 22 to vibrate, so that the lower diaphragm 22 vibrates and emits sound at the same time.

In this embodiment, the lower frame supports 252 include four, the lower frame connecting walls 253 include four, and each lower frame support 252 is bent and extended to form a lower frame connecting wall 253. The lower frame connecting walls 253 are respectively provided at the four rounded corners of the voice coil 23. The above structure symmetrically supports the voice coil 23, the support is more stable, and the vibration reliability is better.

At this time, the lower diaphragm 22, the lower skeleton 25, the isolation diaphragm 26, and the lower basin frame 1 collectively enclose the lower front cavity 103.

More preferably, the lower frame body 251 includes a lower frame body wall 2511, and an end of the lower frame body wall 2511 that is close to the isolation diaphragm 26 is bent and extended along a vibration direction perpendicular to the upper diaphragm 21. The first lower reinforcement wall 2512 and the second lower reinforcement wall 2513 extending from the end of the lower skeleton body wall 2511 close to the lower diaphragm 22 in a bending direction perpendicular to the vibration direction. Wherein, the lower frame bracket 252 is bent and extended from the lower frame body wall 2511. The first lower reinforcement wall 2512 is connected to the isolation diaphragm 26. The second lower reinforcement wall 2513 is connected to the lower diaphragm 22. Specifically, the second lower reinforcement wall 2513 is connected to the lower spherical top 224.

The arrangement of the first lower reinforcing wall 2512 and the second lower reinforcing wall 2513 increases the connection strength of the lower frame body 251 and the isolation diaphragm 26 by increasing the joint area, and the lower frame body 251 The connection strength with the lower diaphragm 22 further improves the vibration reliability.

In this embodiment, the first lower reinforcement wall 2512 and the second lower reinforcement wall 2513 are respectively located on two different sides of the lower skeleton body wall 2511.

In this embodiment, the basin frame 1 includes a bottom wall 11 that fixedly supports the magnetic circuit system 3, a ring-shaped side wall 12 extending from the periphery of the bottom wall 11, and a side wall extending from the side wall 12 to An annular support wall 13 extending in the direction close to the magnetic circuit system 3.

The outer peripheral side of the lower diaphragm 22 is fixed to the side wall 12, specifically, the lower fixing portion 223 of the lower diaphragm 22 is fixed to the side wall 12, and makes the lower diaphragm 22 and the The bottom wall 11 is arranged at intervals to provide a vibration space for the lower diaphragm 22.

The outer peripheral side of the upper diaphragm 21 is fixed to an end of the side wall 12 away from the bottom wall 11, specifically, the second upper fixing portion 215 of the upper diaphragm 21 is fixed to the side wall 12 One end away from the bottom wall 11.

The sound hole 120 penetrates the side wall 12 and is located on the side of the supporting wall 13 close to the bottom wall 11.

Specifically, the side wall 12 includes a first side wall 121 bent and extended from the periphery of the bottom wall 11 and a second side wall 122 extending from the first side wall 121 in a direction away from the bottom wall 11, The supporting wall 13 is bent and extended from the second side wall 122.

The outer circumferential side of the upper diaphragm 21, that is, the second upper fixing portion 215 is fixed to the end of the second side wall 122 away from the bottom wall 11; the outer circumferential side of the lower diaphragm 22, that is, the lower fixing The portion 223 is sandwiched and fixed between the first side wall 121 and the second side wall 122. The sound hole 120 penetrates the second side wall 122 and is located on the side of the supporting wall 13 close to the bottom wall 11.

The outer peripheral side of the isolation diaphragm 26 is fixed to the supporting wall 13 of the basin frame 1. At this time, the lower diaphragm 22, the lower frame 25, the isolation diaphragm 26, and the second side wall 122 collectively enclose the lower front cavity 103 for the lower diaphragm 22 to emit sound.

The magnetic circuit system 3 includes a magnetic yoke 31 supported on the bottom wall 11, a main magnetic steel 32 fixed to the magnetic yoke 31 and a secondary magnetic steel 33 surrounding the main magnetic steel 32 respectively. The secondary magnet 33 is spaced from the main magnet 32 to form the magnetic gap 30.

The auxiliary magnet 33 is provided with a relief opening 330, and both the upper frame 24 and the lower frame 25 extend into the magnetic gap 30 through the relief opening 330 and are connected to the voice coil 23. Specifically, the upper frame extension wall 242 of the upper frame 24 extends into the magnetic gap 30 through the relief opening 330; the lower frame support 252 of the lower frame 25 passes through the relief opening 330 330 extends into the magnetic gap 30.

The first upper fixing portion 214 of the upper diaphragm 21 is fixed to the side of the auxiliary magnetic steel 33 away from the yoke 31.

More preferably, the auxiliary magnet 33 includes first auxiliary magnets 331 arranged at intervals on opposite sides of the main magnet 32 and second auxiliary magnets 331 arranged at intervals on the other opposite sides of the main magnet 32. 332. The adjacent first secondary magnet 331 and the second secondary magnet 332 are arranged at intervals to form the relief opening 330.

The magnetic circuit system 3 also includes a magnetic conductive plate 34 covering the secondary magnetic steel 31, and the magnetic conductive plate 34 presses the inner peripheral side of the upper diaphragm 21, that is, the first upper fixing portion 214 On the secondary magnetic steel 31, the fixing strength of the upper diaphragm 21 is strengthened to improve reliability.

In order to reduce the leakage of the magnetic field of the magnetic circuit system 30, the magnetic conductive plate 34 is arranged in a flat plate shape, and the magnetic conductive plate 34 covers the main magnetic steel 32 and the magnetic gap 30. In this embodiment, the magnetic conductive plate 34 abuts against the main magnet 32.

More preferably, the end of the secondary magnetic steel 33 away from the yoke 31 is in a chamfered structure, the first upper folding ring portion 211 is set right at the position of the chamfering structure, and the first upper folding ring The portion 211 has an arc-shaped structure that is recessed in a direction 3 away from the magnetic circuit system. This structure utilizes the chamfered structure to provide a place for the vibration of the first upper folded ring portion 211, so that the first upper folded ring portion 211 has a larger vibration space and improves the effective vibration amplitude.

The above are only the embodiments of the present invention. It should be pointed out here that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present invention, but these all belong to the present invention. The scope of protection.

Claims

A sound-producing device, comprising a basin frame, a vibration system respectively supported on the basin frame, and a magnetic circuit system for driving the vibration system to vibrate and produce sound, the magnetic circuit system having a magnetic gap, characterized in that the vibration system include:

The upper diaphragm, the upper diaphragm is ring-shaped and arranged around the magnetic circuit system, the upper diaphragm is fixed to the basin frame, and the upper diaphragm and the basin frame jointly enclose a receiving space, so The side of the upper diaphragm away from the receiving space communicates with the outside and serves as an upper front cavity for the upper diaphragm to emit sound;

The lower diaphragm, the lower diaphragm is ring-shaped and is arranged at intervals around the magnetic circuit system, the lower diaphragm is opposed to the upper diaphragm and is located in the containing space, and the outer periphery of the lower diaphragm Side fixed to the basin frame;

A voice coil, the voice coil is inserted in the magnetic gap to drive the upper diaphragm and the lower diaphragm to vibrate and produce sound;

An upper skeleton, the upper skeleton is located in the accommodating space, the upper skeleton is ring-shaped and is arranged at intervals around the magnetic circuit system, and the upper skeleton is respectively connected with the upper diaphragm and the voice coil;

A lower frame, the lower frame is located in the containing space, the lower frame is ring-shaped and is arranged at intervals around the magnetic circuit system, and the lower frame is respectively connected with the lower diaphragm and the voice coil, so The voice coil simultaneously drives the upper frame and the lower frame to drive the upper diaphragm and the lower diaphragm to vibrate simultaneously; and,

The isolation diaphragm is ring-shaped and is arranged at intervals around the magnetic circuit system, the isolation diaphragm is located in the containing space and the isolation diaphragm is arranged at intervals between the upper diaphragm and the Between the lower diaphragms, the outer circumferential side of the isolation diaphragm is connected to the basin frame, and the inner circumferential side of the isolation diaphragm is connected to the lower frame;

The lower diaphragm, the lower frame, the isolation diaphragm, and the basin frame jointly divide the housing space into a lower front cavity for the lower diaphragm to emit sound, and a lower front cavity for the upper diaphragm and The rear cavity shared by the lower diaphragm; the basin frame is provided with a sound hole passing through it, and the sound hole connects the lower front cavity with the outside.
The sounding device according to claim 1, wherein the upper frame includes an upper frame body arranged at intervals on the outer peripheral side of the magnetic circuit system, and the upper frame body is bent and extended to the magnetic circuit system. The upper skeleton extension wall in the magnetic gap and the arc-shaped upper skeleton connecting wall bent and extended by the upper skeleton extension wall; the upper skeleton body is connected to the upper diaphragm; the voice coil is a belt In a rectangular structure with rounded corners, the upper frame connecting wall is attached to the rounded corners on the outer peripheral side of the voice coil.
The sounding device according to claim 2, wherein the upper skeleton body comprises two and are respectively arranged on opposite sides of the voice coil at intervals, and the opposite ends of each upper skeleton body are respectively bent Two upper frame extension walls are formed, each of the upper frame extension walls is bent and extended to form the upper frame connecting wall, and the four upper frame connecting walls are respectively arranged on the four circles of the voice coil Corner.
The sounding device according to claim 2, wherein the upper skeleton body comprises an upper skeleton body wall and an end of the upper skeleton body wall close to the upper diaphragm along a vibration perpendicular to the upper diaphragm The upper reinforcing wall is bent and extended in the direction; the upper skeleton extension wall is bent and extended by the upper skeleton body wall, and the upper reinforcing wall is connected with the upper diaphragm.
The sounding device according to claim 1, wherein the lower frame includes a ring-shaped lower frame body arranged around the magnetic circuit system at intervals, and the lower frame body is bent toward the magnetic circuit system The lower frame support extending into the magnetic gap and the arc-shaped lower frame connecting wall extending from the lower frame support; the end of the lower frame body close to the upper diaphragm and the isolation diaphragm The side away from the upper diaphragm is connected, the end of the lower frame body away from the upper diaphragm is connected with the side of the lower diaphragm close to the upper diaphragm, and the lower frame connecting wall is attached to The rounded corners on the outer peripheral side of the voice coil are arranged at intervals from the upper frame connecting wall.
The sounding device according to claim 5, wherein the lower frame supports include four, the lower frame connecting walls include four, and each of the lower frame supports is bent and extended to form a lower frame Connecting walls, the four lower frame connecting walls are respectively arranged at the four rounded corners of the voice coil.
The sounding device according to claim 5, wherein the lower skeleton body comprises a lower skeleton body wall, and an end of the lower skeleton body wall close to the isolation diaphragm along a vibration direction perpendicular to the upper diaphragm A first lower reinforcing wall that is bent and extended in the direction, and a second lower reinforcing wall that is bent and extended from an end of the lower frame body wall close to the lower diaphragm along a direction perpendicular to the vibration direction, the first lower reinforcement The wall and the second lower reinforcement wall are respectively located on two different sides of the lower frame body wall; the first lower reinforcement wall is connected to the isolation diaphragm; the second lower reinforcement wall is connected to the lower vibration Membrane connection; the lower frame support is bent and extended by the wall of the lower frame body.
The sounding device according to claim 1, wherein the upper diaphragm includes a first upper folding ring portion each having a ring shape, and a ring-shaped second ring portion surrounding the first upper folding ring portion and spaced apart from each other. Two upper folding ring parts, a first upper vibrating part bent and extended from the outer peripheral side of the first upper folding ring part, and a first upper fixing part bent and extended from the inner peripheral side of the first upper folding ring part , The second upper fixing portion bent and extended from the outer peripheral side of the second upper folding ring portion, the second upper vibrating portion bent and extended from the inner peripheral side of the second upper folding ring portion, and the cover is fixed at the same time At the top of the upper ball on the side of the first upper vibrating portion and the second upper vibrating portion away from the lower diaphragm, the first upper fixing portion is fixed to the magnetic circuit system, and the second upper fixing The part is fixed to the basin frame; the upper frame is connected to the first upper vibrating part.
8. The sound emitting device according to claim 8, wherein the top of the upper sphere and the isolation diaphragm are arranged directly opposite to each other.
The sounding device according to claim 8, wherein the lower diaphragm includes a ring-shaped lower ring portion, a lower vibration portion bent and extended from the inner peripheral side of the lower ring portion, and The outer periphery of the lower ring portion is bent and extended, and the lower fixing portion is covered and fixed to the lower vibrating portion on the side close to the upper diaphragm, and the ring-shaped lower spherical top; the lower spherical top and the The lower frame is connected, and the lower fixing part is fixed between the basin frames.
The sound generating device according to claim 10, wherein the isolation diaphragm is arranged directly opposite to the top of the lower ball, and the width of the isolation diaphragm along the vibration direction perpendicular to the upper diaphragm is smaller than The width of the top of the lower ball.
The sounding device according to claim 10, wherein the second upper folding ring portion and the lower folding ring portion are arranged directly opposite to each other.
The sounding device according to claim 12, wherein the second upper folding ring portion has an arc-shaped structure formed by recessing in a direction away from the lower folding ring portion, and the lower folding ring portion has a direction away from the lower folding ring portion. The arc structure formed by the direction depression of the second upper folding ring portion.
The sounding device according to claim 10, wherein the basin frame includes a bottom wall that fixedly supports the magnetic circuit system, a ring-shaped side wall bent and extended from the periphery of the bottom wall, and a side wall formed by the side The wall is a ring-shaped support wall extending in the direction close to the magnetic circuit system; the outer peripheral side of the lower diaphragm is fixed to the side wall so that the lower diaphragm is spaced from the bottom wall, and the upper The outer peripheral side of the diaphragm is fixed to an end of the side wall away from the bottom wall, the outer peripheral side of the isolation diaphragm is fixed to the supporting wall, and the sound hole is provided through the side wall and is located in the supporting wall Close to the side of the bottom wall.
The sounding device according to claim 14, wherein the magnetic circuit system includes a yoke supported on the bottom wall, a main magnet fixed to the yoke, and an auxiliary magnet surrounding the main magnet. Magnetic steel, the secondary magnetic steel is separated from the main magnetic steel to form the magnetic gap; the secondary magnetic steel is provided with a relief opening, and the upper skeleton and the lower skeleton both extend through the relief opening to Inside the magnetic gap and connected with the voice coil; the first upper fixing portion is fixed on the side of the auxiliary magnetic steel away from the yoke.
The sounding device according to claim 15, wherein the auxiliary magnets include first auxiliary magnets spaced apart on opposite sides of the main magnet and spaced apart on the other opposite sides of the main magnetic steel. The second secondary magnetic steel, the adjacent first secondary magnetic steel and the second secondary magnetic steel are spaced apart to form the relief opening.
The sounding device according to claim 15, wherein the magnetic circuit system further comprises a magnetic conductive plate covering the secondary magnetic steel, and the magnetic conductive plate presses the first upper fixing part on The auxiliary magnetic steel.
The sound emitting device according to claim 17, wherein the magnetic conductive plate abuts against the main magnetic steel.
The sounding device according to claim 15, wherein the end of the auxiliary magnetic steel away from the magnetic yoke has a chamfered structure, and the first upper folding ring portion is disposed right at the position of the chamfered structure, and The first upper folding ring portion has an arc structure formed by recessing in a direction away from the magnetic circuit system.