WO2021056899A1

WO2021056899A1 - Sound generation device

Info

Publication number: WO2021056899A1
Application number: PCT/CN2019/129003
Authority: WO
Inventors: 汤仲品; 岳召进
Original assignee: 歌尔股份有限公司
Priority date: 2019-09-29
Filing date: 2019-12-27
Publication date: 2021-04-01
Also published as: CN110662143A; CN110662143B

Abstract

Disclosed is a sound generation device, comprising a housing, a magnetic circuit system and a vibration system being mounted on the housing. The vibration system is conducted with an external circuit by means of a signal access terminal arranged on the housing, and the vibration system comprises a vibrating diaphragm assembly, a voice coil assembly and a centering disk, both the voice coil assembly and the centering disk being fixedly connected to the vibrating diaphragm assembly in the vibration direction of the sound generation device, and the centering disk being located outside the voice coil assembly in the direction perpendicular to the vibration direction of the sound generation device; and the magnetic circuit system is provided with a wire passing portion, a lead wire connected to the voice coil assembly passing through the magnetic circuit system and extending to the signal access terminal to be electrically connected to the signal access terminal. The technical effect of the present invention is that the structure of the sound generation device reduces the height of the sound generation device, and simplifies the process of assembling the sound generation device.

Description

A sounding device

Technical field

The present invention relates to the field of acousto-electric technology, and more specifically, to a sound generating device.

Background technique

The sound device is a device that converts electrical signals into vibrations so that the diaphragm vibrates in the air and emits sound.

The sound generating device generally includes a voice coil that introduces external current, a supporting centering piece, a magnet that generates a magnetic field, a U iron that carries the magnet, a diaphragm that vibrates and emits sound, and a housing that carries an integral part.

Among them, the outer lead of the voice coil needs to bypass the U iron and the centering support piece, which has the problem of high difficulty in lead laying process and occupation of space in the direction of extra height.

The existing sound generating device increases the height of the sound generating device due to the structure of stacking and assembling each component. Increase the volume of space occupied by the sound device.

The use of sounding devices in various equipment is very common, and the height of the sounding device determines the size of the space it occupies in the equipment. The total height of the ultra-thin sound generating device in the existing sound generating device is generally greater than or equal to 12 mm. The installation space of the sound device is limited.

Therefore, a new technical solution is needed to solve the above-mentioned problems.

Summary of the invention

An object of the present invention is to provide a new technical solution for a sound generating device.

According to the first aspect of the present invention, there is provided a sound generating device, including:

A housing on which a magnetic circuit system and a vibration system are installed, and the vibration system is connected to an external circuit through a signal access terminal provided on the housing,

The vibration system includes a diaphragm assembly, a voice coil assembly, and a centering support piece; both the voice coil assembly and the centering support piece are connected and fixed with the diaphragm assembly in the vibration direction of the sound emitting device, and , In the direction perpendicular to the vibration of the sounding device, the centering support piece is located on the outer side of the voice coil assembly;

The magnetic circuit system is provided with a wire passing part, and the brocade wire connected to the voice coil assembly passes through the magnetic circuit system and extends to the signal access terminal to be electrically connected to the signal access terminal. Sexual connection.

Optionally, the diaphragm assembly includes a folded ring and a carcass that are combined together, and the voice coil assembly includes a cylindrical voice coil skeleton and a voice coil wound on the outside of the voice coil skeleton. The voice coil bobbin is connected and fixed together.

Optionally, the included angle between the carcass and the axial direction of the voice coil skeleton is greater than 60°.

Optionally, a cylindrical portion is provided on the inner side of the centering support piece, and the top of the cylindrical portion is connected to the diaphragm assembly; the centering support piece further includes a fixing device for fixing with the brocade thread The first fixing part and the second fixing part.

Optionally, the magnetic circuit system includes a U iron and a permanent magnet, the U iron includes a bottom plate and a side wall, the bottom plate and the side wall form an accommodating cavity, and the permanent magnet is fixed in the accommodating cavity and A magnetic gap is formed between the side wall and the side wall; the wire passing part is arranged on the side wall of the U iron.

Optionally, the first fixing portion is the bottom of the cylindrical portion, and the second fixing portion is located at the first connection point of the centering support piece and the housing; the brocade thread is from a U iron After the thread-passing parts are passed out, they are respectively fixed to the first fixing part and the second fixing part.

Optionally, the centering support piece further includes a third fixing portion, the third fixing portion is located at the second connection point with the housing, between the third fixing portion and the second fixing portion A plurality of first elastic arms are provided, and the plurality of first elastic arms are close to the edge of the centering support piece, and a first window is formed between two adjacent first elastic arms; the signal access terminal is injection molded in The position of the housing corresponding to the first window.

Optionally, a plurality of third elastic arms are provided between the first fixing part and the second fixing part, and a third window is formed between the plurality of third elastic arms; After the first fixing part is fixed, it continues to extend to the second fixing part through the third window, and then is electrically connected to the signal access terminal through the first window after being fixed.

Optionally, the bottom of the housing is provided with an installation opening, and a clamping member is arranged in the installation opening, and the clamping member is fixed to the wire passing part of the U iron.

Optionally, the minimum thickness of the sound emitting device is less than or equal to 10 mm.

According to an embodiment of the present disclosure, a technical effect of the present invention is that the height of the sound generating device can be reduced, and the assembly process of the sound generating device can be simplified.

Through the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings, other features and advantages of the present invention will become clear.

Description of the drawings

The drawings incorporated in the specification and constituting a part of the specification illustrate the embodiments of the present invention, and together with the description are used to explain the principle of the present invention.

Fig. 1 is an exploded view of the structure of a sound generating device according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of a centering brace connecting structure according to an embodiment of the present invention.

Fig. 3 is a bottom view of the structure of a sound generating device according to an embodiment of the present invention.

Fig. 4 is a partial cross-sectional view of Fig. 3.

Fig. 5 is a partial enlarged view of Fig. 4.

In the figure, 1 is the housing, 11 is the bottom mounting port, 111 is the clip, 12 is the second elastic arm, 13 is the second window, 14 is the bottom recess, 2 is the U iron, 21 is the side wall, and 22 is the cable Part, 3 is a permanent magnet, 4 is a washer, 5 is a voice coil frame, 51 is a voice coil, 511 is a brocade thread, 6 is a centering piece, 61 is a third fixing part, 621 is a third window, and 622 is a The first fixing part, 623 is the second fixing part, 63 is the cylindrical part, 64 is the first elastic arm, 65 is the first window, 7 is the diaphragm assembly, 71 is the folding ring, 72 is the carcass, 8 is the dustproof Cap, 9 is the signal access terminal.

detailed description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless specifically stated otherwise, the relative arrangement of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention.

The following description of at least one exemplary embodiment is actually only illustrative, and in no way serves as any limitation to the present invention and its application or use.

The technologies, methods, and equipment known to those of ordinary skill in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be regarded as part of the specification.

In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiment may have different values.

It should be noted that similar reference numerals and letters indicate similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in the subsequent drawings.

According to an embodiment of the present disclosure, there is provided an ultra-thin sound generating device. As shown in FIG. 1, the device includes:

A housing 1, a magnetic circuit system and a vibration system are installed on the housing 1, and the vibration system is connected to an external circuit through a signal access terminal 9 provided on the housing 1,

The vibration system includes a diaphragm assembly 7, a voice coil assembly, and a centering support piece 6. Both the voice coil assembly and the centering support piece 6 are aligned with the diaphragm assembly 7 in the vibration direction of the sound generating device. The connection is fixed, and, in the direction perpendicular to the vibration of the sound generating device, the centering support piece 6 is located on the outer side of the voice coil assembly;

The magnetic circuit system is provided with a wire passing portion 22, and the brocade wire 511 connected to the voice coil assembly passes through the magnetic circuit system and extends to the signal access terminal 9 to connect with the signal. The input terminal 9 is electrically connected.

In this embodiment, the housing 1 is used as the carrier of the entire sounding device, and the whole is in a concave structure. After the sounding device is assembled, the remaining parts of the sounding device are confined in the housing 1. The vibration system and the magnetic circuit system cooperate to make the sound device vibrate.

Wherein, the brocade wire 511 on the voice coil assembly is drawn from the wire passing portion 22 on the magnetic circuit system, and is electrically connected to the signal access terminal 9. In this way, the brocade wire 511 can be prevented from bypassing the upper part of the magnetic circuit system, and the increased structural thickness of the brocade wire 511 is eliminated. In addition, the degree of bending of the brocade thread 511 is reduced, and the brocade thread 511 is prevented from being broken or damaged during the vibration process.

In one embodiment, the diaphragm assembly 7 includes a folded ring 71 and a body 72 combined together, and the voice coil assembly includes a cylindrical voice coil bobbin 5 and a voice coil wound on the outside of the voice coil bobbin 5 51, the carcass 72 and the voice coil skeleton 5 are connected and fixed together.

In this embodiment, the voice coil bobbin 5 in the diaphragm assembly 7 is fixedly connected to the carcass to support the voice coil bobbin 5. A voice coil 51 acts to vibrate in the magnetic gap to drive the voice coil skeleton 5 to vibrate, and the voice coil skeleton 5 drives the diaphragm assembly 7 to vibrate.

In an embodiment, the angle between the carcass and the axial direction of the voice coil skeleton is greater than 60°. Within this angle range, the cone can be kept small inclination, close to a plane. The height of the device can be minimized from the structure of the diaphragm assembly 7.

In one embodiment, as shown in FIG. 1, the magnetic circuit system includes a U iron 2 and a permanent magnet 3. The U iron 2 includes a bottom plate and a side wall 21, and the bottom plate and the side wall 21 form an accommodating cavity, The permanent magnet 3 is fixed in the accommodating cavity and forms a magnetic gap with the side wall 21; the wire passing portion 22 is arranged on the side wall 21 of the U iron 2.

In this embodiment, the magnetic gap formed between the U iron 2 and the permanent magnet 3 is used to interact with the voice coil 51 after being energized to generate vibration. The thread passing part 22 is used to draw out the brocade thread 511.

In an example, a washer 4 is provided on the upper part of the permanent magnet 3, and a magnetic gap is formed between the washer 4 and the side wall 21.

In one embodiment, as shown in Figures 1, 5, the bottom of the housing 1 is provided with a mounting port 11, the mounting port 11 is provided with a clamping member 111, the clamping member 111 and the U iron 2 The wire passing portion 22 is fixed.

In this embodiment, when the U iron 2 is installed, it is inserted from the installation opening 11 at the bottom of the housing 1, and then the bottom of the U iron 2 is fixed to the bottom of the housing 1 from the position of the wire passing portion 22. For example, it can be fixed by welding or hot melting.

For example, the clip 111 has a bending structure, and the bending structure is fixed to the wire passing portion 22.

The bending structure of the clamping member 111 can facilitate the positioning of the U iron during installation and the accurate fixation with the wire passing portion 22.

In one embodiment, as shown in FIG. 5, the bottom of the U iron 2 and the bottom of the housing 1 are flush on the outside after being fixed.

The flush bottom can eliminate the extra device height caused when the bottom of the U iron 2 protrudes out of the housing 1.

Wherein, the wire passing portion 22 divides the side wall 21 into multiple parts, and the side walls of the multiple parts are easier to concentrate the magnetic lines of force, so as to improve the performance of the sound generating device.

In one embodiment, as shown in Fig. 1, the side wall 21 of the U iron 2 has a cylindrical structure, and the bottom plate and one end of the side wall 21 are fixed to form an accommodating cavity. The multiple evenly distributed wire passing parts 22 on the side wall 21 can satisfy that the brocade wires 511 drawn from the voice coil 51 in different directions are connected to the signal access terminal 9.

In one embodiment, as shown in FIG. 1, four wire passing parts 22 are provided on the side wall 21. The four wire passing parts 22 divide the side wall 21 into 4 uniform sections, which can better concentrate the magnetic circuit system. The lines of magnetic force.

In other examples, the wire passing portion 22 may be one of a U-shape, a rectangular shape, and a V-shape, or other shapes. Different shapes of the wire passing portion 22 can satisfy the purpose of drawing the brocade thread 511 of the wire passing portion 22 to reduce the assembly height.

In other examples, the wire passing portion 22 may also be a notch, a notch, and a through hole structure, or may be a combination of each structure.

For example, the side wall 21 is provided with a plurality of through holes evenly distributed along the side wall, and the brocade thread 511 is led out from the through holes, which can also meet the purpose of reducing the assembly height.

In one embodiment, as shown in FIG. 2, the inner side of the centering support piece 6 is provided with a cylindrical portion 63, and the top of the cylindrical portion 63 is connected to the diaphragm assembly 7; the centering support The sheet 6 further includes a first fixing part 622 and a second fixing part 623 for fixing with the brocade thread 511.

In this embodiment, when the centering support piece 6 is installed, the top of the cylindrical portion 63 and the diaphragm assembly 7 are fixedly connected.

Wherein, the upper part of the voice coil bobbin 5 is also fixed on the diaphragm assembly 7, a hollow structure is formed in the middle of the diaphragm assembly 7, and the voice coil bobbin 5 is fixed in the hollow structure on the diaphragm assembly 7.

For example, the outer side wall of the upper part of the voice coil bobbin 5 is attached and fixed to the inner wall of the hollow structure.

A dustproof membrane 8 is provided on the hollow structure of the diaphragm assembly 7 for sealing.

In one embodiment, the first fixing portion 622 is the bottom of the cylindrical portion 63, and the second fixing portion 623 is located at the first connection point between the centering support piece 6 and the housing 1; After the brocade thread 511 passes through the thread passing portion 22 of the U iron 2, it is fixed to the first fixing portion 622 and the second fixing portion 623 respectively.

The fixing method can be fixed by dispensing glue. It can also be other fixed methods.

Obviously, the brocade wire 511 refers to that the wire drawn from the voice coil 51 is covered with a layer of wire to increase the strength. The second fixation on the centering support piece 6 can reduce the vibration amplitude of the brocade thread 511 to avoid breakage during the vibration process.

In one embodiment, as shown in FIG. 2, the centering support piece 6 further includes a third fixing portion 61, and the third fixing portion 61 is located at the second connection point with the housing 1. A plurality of first elastic arms 64 are provided between the third fixing portion 61 and the second fixing portion 623, and the plurality of first elastic arms 64 are close to the edge of the centering support piece 6, and two adjacent first elastic arms 64 A first window 65 is formed between an elastic arm 64; the signal access terminal 9 is injection molded at a position corresponding to the first window 65 of the housing 1.

In this embodiment, the third fixing portion 61 is fixed to the edge of the housing 1 during assembly. A plurality of first elastic arms 64 are formed between the third fixing portion 61 and the second fixing portion 623, and a first window 65 is formed between adjacent first elastic arms 64. Wherein, the first elastic arm 64 and the first window 65 formed are center-symmetric and uniformly distributed around the center of the centering support piece 6. In this way, the force of each first elastic arm 64 can be uniform during the vibration process, and the vibration of the centering support piece 6 can be more stable.

In one embodiment, a plurality of third elastic arms are provided between the first fixing portion 622 and the second fixing portion 623, and a third window 621 is formed between the plurality of third elastic arms; After the brocade wire 511 is fixed to the first fixing portion 622, it continues to extend to the second fixing portion 623 through the third window 621, and then is electrically connected to the signal access terminal 9 through the first window 64 after being fixed. .

In this embodiment, the third elastic arm formed between the first fixing portion 622 and the second fixing portion 623 serves as a support, and the third window 621 formed between the adjacent third elastic arms is used to remove the wire from the The brocade thread 511 drawn from 22 is drawn, and after passing through the third window 621, it passes through the first window 64 and is electrically connected to the signal access terminal 9.

Such a structure enables the brocade thread 511 to directly pass through the centering support piece 6 without bypassing the centering support piece 6. The thickness of the structure produced when the brocade thread 511 goes around the centering support piece 6 is reduced.

In the prior art, the brocade thread is bypassed from the top of the side wall. The brocade thread increases the thickness in the height direction of the structure, which causes the brocade thread to bend more. It is easily damaged.

In the above embodiment, the brocade thread 511 is drawn from the voice coil 51 and passes through the U iron 2 along the threaded portion 22. In this way, it is possible to avoid the need for the silk thread 511 to go around from the upper part of the U iron 2, reduce the assembly steps of the winding, and save the thickness of the winding, so as to reduce the overall height of the sound generating device. At this time, the brocade thread 511 is located below the centering branch 6, and then the brocade thread 511 passes through the third window 621 and reaches above the centering branch 6. Finally, it passes through the first window 653, connects to the signal access terminal 9, and communicates with the external circuit. In this way, while realizing that the brocade wire 511 is externally connected to the circuit, it also saves the space provided separately for the brocade wire 511 in the height direction of the housing 1 to be drawn out. The height of the whole sounding device is reduced again.

In other examples, two symmetrical third windows 621 may be provided on the centering support piece 6, so that the brocade thread 511 can be led out from both sides. It is also possible that a plurality of third windows 621 are provided on the centering support piece 6, and the plurality of third windows 621 are evenly distributed around the through holes on the centering support piece 6. In this way, it is convenient for the brocade thread 511 to be drawn out from multiple different positions during assembly.

In one embodiment, as shown in FIGS. 2 and 5, the top of the cylindrical portion 63 is bent inward, and the surface formed by the bending is fixed to the diaphragm assembly 7. Compared with the direct fixation, the surface formed after bending has a larger area for bonding and fixation with the diaphragm assembly 7, which can increase the fixation strength of the centering support piece 6.

In one embodiment, as shown in FIG. 1, the first elastic arm 64 is bent downward along the third fixing portion 61 and forms a depression relative to the cylindrical portion 63 and the third fixing portion 61. In the recessed structure, the top of the cylindrical portion 63 is flush with the third fixing portion 61.

In this embodiment, such a structure can match the structure of the housing 1 to reduce the size of the structure in the height direction.

In other examples, a second elastic arm 12 is provided at a position of the housing 1 relative to the first elastic arm 64, and a second window 13 is formed between adjacent second elastic arms 12. The second window 13 not only reduces the weight of the housing 1, but also saves materials. It can also be used as an observation port for observing the internal assembly structure during assembly. Easy to assemble.

For example, a plurality of second elastic arms 12 are provided on the housing 1, and a second window 13 is formed between adjacent second elastic arms 12. Among them, the distribution of the first elastic arm 64 and the second elastic arm 12 are the same, and the first window 65 and the second window 13 are in communication.

The second elastic arm 12 is bent downward to form a depression, so that the first elastic arm 64 on the centering support piece 6 and the second elastic arm 12 on the housing 1 can be matched. The assembly can be simplified, and the overall height of the device can be prevented from being resisted in structure.

Moreover, when assembling the sound emitting device, the first window 64 and the second window 65 can be used as observation ports to observe the assembly of the internal structure. To check whether the assembly is correct.

In an embodiment, the thickness of the sound emitting device is ≤10mm. After the sounding device is assembled from the above structure, its overall thickness can be as small as 10 mm or less, which is greatly reduced compared to the thickness of the sounding device in the prior art.

Although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present invention. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present invention. The scope of the invention is defined by the appended claims.

Claims

A sound generating device includes a housing on which a magnetic circuit system and a vibration system are installed, and the vibration system is connected to an external circuit through a signal access terminal provided on the housing, and is characterized in that:

The vibration system includes a diaphragm assembly, a voice coil assembly and a centering support piece; both the voice coil assembly and the centering support piece are connected and fixed with the diaphragm assembly in the vibration direction of the sound generating device, and , In the direction perpendicular to the vibration of the sounding device, the centering support piece is located on the outer side of the voice coil assembly;

The magnetic circuit system is provided with a wire passing part, and the brocade wire connected to the voice coil assembly passes through the magnetic circuit system and extends to the signal access terminal to be electrically connected to the signal access terminal. Sexual connection.
The sounding device according to claim 1, wherein the diaphragm assembly includes a folded ring and a carcass that are combined together, and the voice coil assembly includes a cylindrical voice coil bobbin, and the voice coil bobbin is wound on the outside of the voice coil bobbin. The voice coil, the carcass and the voice coil skeleton are connected and fixed together.
The sounding device according to claim 2, wherein the included angle between the carcass and the axial direction of the voice coil skeleton is greater than 60°.
The sounding device according to claim 1, wherein a cylindrical portion is provided on the inner side of the centering support piece, and the top of the cylindrical portion is connected to the diaphragm assembly; the centering support piece is also It includes a first fixing part and a second fixing part for fixing with the brocade thread.
The sounding device according to claim 4, wherein the magnetic circuit system includes a U iron and a permanent magnet, the U iron includes a bottom plate and a side wall, the bottom plate and the side wall form an accommodating cavity, and the permanent magnet The magnet is fixed in the accommodating cavity and forms a magnetic gap with the side wall; the wire passing part is arranged on the side wall of the U iron.
The sounding device according to claim 5, wherein the first fixing portion is the bottom of the cylindrical portion, and the second fixing portion is located at the first connection between the centering support piece and the housing At the point; after the brocade thread passes through the thread passing part of the U iron, it is fixed to the first fixing part and the second fixing part respectively.
The sounding device according to claim 6, wherein the centering support piece further comprises a third fixing part, the third fixing part is located at the second connection point with the housing, and the third fixing part A plurality of first elastic arms are provided between the second fixing portion and the second fixing portion, and the plurality of first elastic arms are close to the edge of the centering support piece, and a first elastic arm is formed between two adjacent first elastic arms. Window; the signal access terminal is injection molded in the housing at a position corresponding to the first window.
The sounding device according to claim 6, wherein a plurality of third elastic arms are provided between the first fixing part and the second fixing part, and a first elastic arm is formed between the plurality of third elastic arms. Three windows; after the brocade thread is fixed to the first fixing part, it continues to extend to the second fixing part through the third window, and then is electrically connected to the signal access terminal through the first window after being fixed.
The sounding device according to claim 5, wherein the bottom of the housing is provided with an installation opening, and a clamping member is arranged in the installation opening, and the clamping member is fixed to the wire passing part of the U iron.
The sounding device according to claim 1, wherein the minimum thickness of the sounding device is less than or equal to 10 mm.