WO2021168911A1

WO2021168911A1 - Sound generation device

Info

Publication number: WO2021168911A1
Application number: PCT/CN2020/079028
Authority: WO
Inventors: 章统
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: 2020-02-24
Filing date: 2020-03-12
Publication date: 2021-09-02
Also published as: CN211959535U

Abstract

Disclosed is a sound generation device, comprising: a basket; and a vibration system and a magnetic circuit system having a magnetic gap respectively fixed to the basket. The vibration system comprises a diaphragm fixed to the basket, a voice coil inserted into the magnetic gap and driving the diaphragm to vibrate and generate sound, and a supporting frame connected to the diaphragm and the voice coil. The supporting frame comprises an annular frame main body and a connection plate crossing over the frame main body and connected to two opposite sides of the frame main body. The frame main body and the connection plate are positioned between the diaphragm and the voice coil. One end of the frame main body is connected to the diaphragm, and the other end thereof is connected to the voice coil. The connection plate is connected to the diaphragm. Compared with the related art, the sound generation device of the present invention has increased high frequency sensitivity and an excellent acoustic performance.

Description

Sound device

Technical field

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

Background technique

With the advent of the mobile Internet era, the number of smart mobile devices continues to rise. Among many mobile devices, mobile phones are undoubtedly the most common and most portable mobile terminal devices. At present, mobile phones have extremely diverse functions, one of which is high-quality music functions. Therefore, sound-generating devices for playing sounds are widely used in current smart mobile devices.

The sound device of the related art includes a basin frame, a vibration system respectively fixed to the basin frame and a magnetic circuit system with a magnetic gap; the vibration system includes a diaphragm fixed to the basin frame, The diaphragm is inserted in the magnetic gap to drive the diaphragm to vibrate and produce sound, a support frame connecting the diaphragm and the voice coil, and one end is fixed to the basin frame, and the other end is fixed to the sound The ring is away from the elastic support component at one end of the diaphragm.

technical problem

However, in the sound device described in the related art, the bonding area between the upper surface of the support frame and the diaphragm is small, and only one outer circle supports the diaphragm. At high frequencies, the division vibration of the diaphragm is severe, and the high frequency is cut off. The frequency is low, and the sensitivity is difficult to meet the actual demand.

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

Technical solutions

The purpose of the utility model is to overcome the above technical problems and provide a sound device with higher high frequency sensitivity and better acoustic performance.

In order to achieve the above object, the present invention provides a sounding device, which includes a basin frame, a vibration system fixed to the basin frame and a magnetic circuit system with a magnetic gap; the vibration system includes a frame fixed to the basin frame A diaphragm, a voice coil inserted in the magnetic gap and driving the diaphragm to vibrate and produce sound, and a support frame connecting the diaphragm and the voice coil, the support frame including a ring-shaped frame body and a span The frame body is connected to the connecting plates on opposite sides of the frame body; the frame body and the connecting plate are located between the diaphragm and the voice coil, and one end of the frame body is connected to the vibration The diaphragm and the other end are connected to the voice coil, and the connecting plate is connected to the diaphragm.

Preferably, the skeleton body includes a first body connected to the diaphragm, a second body connected to the voice coil, and a third body connecting the first body and the second body; the connection The plate extends from the first body and connects opposite two sides of the third body.

Preferably, the connecting plate is connected to the midpoint positions of the opposite sides of the third body.

Preferably, the third body has a rectangular structure, and the connecting plate connects two long axis sides of the third body.

Preferably, the vibration system further includes an elastic support assembly fixed to the basin frame and opposed to the diaphragm and arranged at intervals, and the support frame further includes a frame extending from the frame body in a direction away from the voice coil. The frame connection part is located outside the voice coil and has one end connected to the diaphragm and the other end connected to the elastic support component.

Preferably, the frame connecting portion is provided with a top wall opposite to the diaphragm, a bottom wall opposite to the elastic support component, and a side wall connecting the top wall and the bottom wall, the top wall and The diaphragm is connected, and the bottom wall is connected with the elastic support component; the top wall and the bottom wall are respectively located on two different sides of the side wall.

Preferably, the skeleton main body, the skeleton connecting portion and the connecting plate are an integrally formed structure.

Preferably, the frame connection parts include four and are arranged at intervals, and the two frame connection parts form a group to form an accommodation space.

Preferably, the magnetic circuit system includes a magnetic yoke, a main magnetic steel fixed to the magnetic yoke, two first auxiliary magnetic steels respectively arranged on opposite sides of the main magnetic steel at intervals, and Two second auxiliary magnets on the other opposite sides of the main magnet, the first auxiliary magnet, the second auxiliary magnet and the main magnet jointly form the magnetic gap; the first auxiliary magnet Steel is contained in the containing space.

Beneficial effect

Compared with the prior art, in the sound generating device of the present invention, the support frame includes a frame body having a ring shape and a connecting plate that spans the frame body and is connected to opposite sides of the frame body; the frame The main body and the connecting plate are located between the diaphragm and the voice coil, one end of the skeleton body is connected to the diaphragm and the other end is connected to the voice coil, and the connecting plate is connected to the diaphragm . This structure increases the bonding area between the support frame and the diaphragm, plays a very good supporting role for the diaphragm, can increase the high-frequency cut-off frequency of the sound device, and suppress the high-frequency of the diaphragm. Splitting the vibration makes the high-frequency sensitivity of the sound emitting device higher and the acoustic performance better.

Description of the drawings

In order to more clearly explain the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description are only some implementations of the present utility model. For example, 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;

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

Figure 3 is a partial structural assembly schematic diagram of the sound device of the present invention;

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

Figure 5 is a cross-sectional view taken along the line A-A in Figure 1;

Figure 6 is an enlarged view of the part shown in C in Figure 5;

Figure 7 is a three-dimensional schematic diagram of the assembly of the support frame of the sound device of the utility model and the second auxiliary magnetic steel;

FIG. 8 is a schematic view of the structure of FIG. 7 from another perspective;

Figure 9 is a schematic view of the three-dimensional structure of the assembly of the support frame and the voice coil of the sound device of the present invention;

Figure 10 is a three-dimensional schematic diagram of the assembly of the elastic support component and the support frame of the sound device of the present invention;

Figure 11 is a graph of the high frequency sensitivity of the sound generating device of the present invention.

Embodiments of the present invention

The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, not all of them. Examples. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of the present utility model.

Please refer to FIGS. 1-11 at the same time. The sound generating device 100 provided by the present invention includes a basin frame 1, a vibration system 2 fixed to the basin frame 1 and a magnetic circuit system 3 with a magnetic gap 30.

The vibration system 2 includes a diaphragm 21 fixed to the basin frame 1, a voice coil 22 inserted in the magnetic gap 30 and driving the diaphragm 21 to vibrate and produce sound, and connect the diaphragm 21 and the sound The support frame 23 of the ring 22.

Specifically, the support frame 23 includes a ring-shaped frame body 231 and a connecting plate 232 that spans the frame body 231 and is connected to opposite sides of the frame body 231.

In this embodiment, the skeleton main body 231 and the connecting plate 232 are located between the diaphragm 21 and the voice coil 22, and one end of the skeleton main body 231 is connected to the diaphragm 21 and the other end is connected to The voice coil 22 and the connecting plate 232 are connected to the diaphragm 21. Specifically, the skeleton body 231 includes a first body 2311 connected to the diaphragm 21, a second body 2312 connected to the voice coil 22, and a second body 2312 connected to the first body 2311 and the second body 2312. The third body 2313, which allows the skeleton body 231 to form a zigzag structure, and the first body 2311 and the second body 2312 are glued to the diaphragm 21 and the voice coil 22, respectively. The connection increases the bonding area, strengthens the indirect connection strength between the voice coil 22 and the diaphragm 21, and makes the support frame 23 more stable. On the other hand, the connecting plate 232 extends from the first body 2311 and connects to opposite sides of the third body 2313, and the skeleton body 231 and the connecting plate 232 are located between the diaphragm 21 and the third body 2313. The voice coils 22 are connected to the diaphragm 21, which increases the bonding area between the support frame 23 and the diaphragm 21. Further, the connecting plate 232 is connected to the midpoint positions of the opposite sides of the third main body 2313, which supports the diaphragm 21 well, improves the high-frequency cut-off frequency of the sound emitting device 100, and suppresses The high-frequency divided vibration of the diaphragm 21 makes the high-frequency sensitivity of the sound generating device 100 higher and the acoustic performance better.

More preferably, in order to enable the support frame 23 to better support the diaphragm 21 and further improve the high-frequency acoustic performance of the sound emitting device 100, in this embodiment, the third body 2313 has a rectangular structure , The connecting plate 232 connects the midpoint positions of the two long axis sides of the third body 2313.

The vibration system 2 further includes an elastic support assembly 24 fixed to the basin frame 1 opposite to the diaphragm 21 and arranged at intervals. The support frame 23 further includes a frame body 231 away from the voice coil. The frame connecting portion 233 extending in the 22 direction is located outside the voice coil 22 and has one end connected to the diaphragm 21 and the other end connected to the elastic support assembly 24.

Further, the frame connecting portion 233 is provided with a top wall 2331 opposite to the diaphragm 21, a bottom wall 2332 opposite to the elastic support assembly 24, and a side connecting the top wall 2331 and the bottom wall 2332. The top wall 2332 and the bottom wall 2231 are respectively located on two different sides of the side wall 2332; the top wall 2332 is connected to the diaphragm 21, and the bottom wall 2332 is connected to the elastic The supporting assembly 24 is connected, so that the voice coil 22 can be elastically suspended under the diaphragm 21. That is, one end of the elastic support assembly 24 is fixed to the basin frame 1, and the other end is supported and fixed to the bottom wall 2332. The voice coil 22 can float up and down without being restricted by design. The magnetic circuit system 3 has a magnetic gap 30, and an end of the voice coil 22 away from the diaphragm 21 is inserted into the magnetic gap 30.

The above structure makes the elastic support assembly 24 not directly connected with the voice coil 22, but indirectly connected through the support frame 23. On the one hand, the indirect connection structure realizes the effective suppression of the lateral swing of the voice coil 22 through the elastic support assembly 24, and improves the reliability and stability of the sound generating device 100. On the other hand, the elastic support assembly 24 is The voice coil 22 is not directly connected, which releases the structural design of the voice coil 22, so that the position of the voice coil 22 can float up and down along the vibration direction of the diaphragm 21, and the height of the voice coil 22 is no longer limited by the elastic support component 24, so that the overall height of the sound generating device 100 can be designed to be thinner and lighter. At the same time, the structural design of the magnetic circuit system 3 is released. The elastic support assembly 24 is not directly glued to the voice coil 22, effectively avoiding the interference between the magnetic circuit system 3 and the elastic support assembly 24, and the magnetic circuit system 3 does not need By giving way to the elastic support assembly 24, the magnetic circuit system 3 can achieve a maximized structure, which effectively improves the acoustic performance of the sound generating device 100.

In this embodiment, the frame connecting parts 233 include four and are arranged at intervals, and the two frame connecting parts 233 form a group to form a accommodating space 10 for placing a magnetic steel structure.

It is worth mentioning that the skeleton main body 231, the skeleton connecting portion 233 and the connecting plate 232 are integrally formed. This structure makes the support frame 23 an integral structure, which can effectively suppress the lateral swing of the voice coil 22 under the working state of the sound generating device 100, and improve the stability.

The magnetic circuit system 3 includes a magnetic yoke 31, a main magnetic steel 32 fixed to the magnetic yoke 31, two first auxiliary magnetic steels 33 respectively arranged at intervals on opposite sides of the main magnetic steel 32, and respectively arranged at intervals Two second auxiliary magnets 34 on the other opposite sides of the main magnet 32, the first auxiliary magnet 33, the second auxiliary magnet 34, and the main magnet 32 together form the magnet Gap 30; The first secondary magnet 33 is accommodated in the accommodation space 10.

In order to make the magnetic field lines of the magnetic circuit system 3 be cut by the voice coil 22 as much as possible to form a greater driving force, the magnetic circuit system 3 further includes the magnetic circuit system 3 superimposed on the first secondary magnet 33 and The upper clamping plate 35 on the second auxiliary magnetic steel 34.

Compared with the prior art, in the sound generating device of the present invention, the supporting frame includes a frame body having a ring shape and a connecting plate that spans the frame body and is connected to opposite sides of the frame body; the frame The main body and the connecting plate are located between the diaphragm and the voice coil, one end of the skeleton body is connected to the diaphragm and the other end is connected to the voice coil, and the connecting plate is connected to the diaphragm . This structure increases the bonding area between the support frame and the diaphragm, plays a very good supporting role for the diaphragm, improves the high-frequency cut-off frequency of the sound device, and suppresses the high-frequency of the diaphragm. The divided vibration makes the high frequency sensitivity of the sound generating device higher and the acoustic performance better.

The above are only the embodiments of the utility model, and do not limit the patent scope of the utility model. Any equivalent structure or equivalent process transformation made by using the description and drawings of the utility model, or directly or indirectly applied to other Related technical fields are included in the scope of patent protection of the utility model in the same way.

Claims

A sounding device, which includes a basin frame, a vibration system fixed to the basin frame and a magnetic circuit system with a magnetic gap; A voice coil that drives the diaphragm to vibrate and emit sound and a support frame connecting the diaphragm and the voice coil. Connecting plates on opposite sides of the frame body; the frame body and the connecting plate are located between the diaphragm and the voice coil, one end of the frame body is connected to the diaphragm, and the other end is connected In the voice coil, the connecting plate is connected to the diaphragm.
The sound emitting device according to claim 1, wherein the skeleton main body comprises a first main body connected to the diaphragm, a second main body connected to the voice coil, and a connection between the first main body and the The third body of the second body; the connecting plate extends from the first body and connects opposite sides of the third body.
3. The sound generating device according to claim 2, wherein the connecting plate is connected to the midpoint positions of the opposite sides of the third body.
3. The sound emitting device according to claim 3, wherein the third body has a rectangular structure, and the connecting plate connects two long axis sides of the third body.
The sounding device according to claim 1, wherein the vibration system further comprises an elastic support assembly fixed to the basin frame and opposite to the diaphragm and arranged at intervals, and the support frame further includes A frame connecting part extending away from the voice coil of the frame body, the frame connecting part is located outside the voice coil, one end is connected to the diaphragm, and the other end is connected to the elastic support component.
The sound generating device according to claim 5, wherein the frame connecting portion is provided with a top wall opposite to the diaphragm, a bottom wall opposite to the elastic support component, and a connection between the top wall and the The side wall of the bottom wall, the top wall is connected to the diaphragm, and the bottom wall is connected to the elastic support component; the top wall and the bottom wall are respectively located on different sides of the side wall.
The sound emitting device according to claim 1, wherein the skeleton main body, the skeleton connecting portion and the connecting plate are an integrally formed structure.
The sound generating device according to claim 5, wherein the frame connecting parts include four and are arranged at intervals, and the two frame connecting parts form a group to form a receiving space.
The sounding device according to claim 8, wherein the magnetic circuit system comprises a magnetic yoke, a main magnetic steel fixed to the magnetic yoke, and two second magnetic steels arranged at intervals on opposite sides of the main magnetic steel. A secondary magnet and two second secondary magnets separately arranged on the other opposite sides of the main magnet, the first secondary magnet, the second secondary magnet and the main magnet are formed together The magnetic gap; the first secondary magnet is contained in the containing space.