WO2020140176A1

WO2020140176A1 - Speaker

Info

Publication number: WO2020140176A1
Application number: PCT/CN2018/125943
Authority: WO
Inventors: 梁平; 赵彬
Original assignee: 瑞声声学科技(深圳)有限公司
Priority date: 2018-12-30
Filing date: 2018-12-30
Publication date: 2020-07-09

Abstract

The present invention is applicable to the field of electroacoustic transducers. Provided is a speaker. The speaker comprises a frame, a vibration system, a magnetic circuit system and a flexible circuit board. The vibration system comprises an upper diaphragm, a voice coil and a lower diaphragm. The lower diaphragm comprises a first clamping portion, a second clamping portion and a surround portion. The flexible circuit board is provided between the voice coil and the first clamping portion. The surround portion comprises a first connection, a second connection portion and a middle portion. A vertical distance between a tangent line of a first end point at the first connection portion with respect to a vibration direction and a tangent line of a second end point at the first connection portion with respect to the vibration direction is a first distance. A vertical distance between a tangent line of a third end point with respect to the vibration direction and a tangent line of a fourth end point with respect to the vibration direction is a second distance. The first distance is less than the second distance. The above structure of the present invention configures a vibration space of the lower diaphragm, such that when the lower diaphragm vibrates, the surround portion thereof does not collide with the flexible circuit board, thereby improving sound purity of the speaker, and enhancing product performance.

Description

A speaker

Technical field

The invention belongs to the technical field of electroacoustic converters, and particularly relates to a speaker.

Background technique

With the rapid development of science and technology, the popularity of speakers is getting higher and higher. People's requirements for speakers are not only limited to the playback of video and audio, but also have higher requirements for the sound quality and reliability of the sound played by the speakers. The speaker is directly related to the sound quality of the playback sound and the stability of the product.

In the prior art, after the lower diaphragm of the speaker is glued to the flexible circuit board, when the lower diaphragm vibrates, since the inside of the folded portion of the lower diaphragm is a curved transition, for some products, the lower diaphragm folded ring may appear There is not enough space between the inside of the part and the flexible circuit board. During the vibration process, the lower diaphragm is likely to cause the inside of the folded part of the lower diaphragm to collide with the flexible circuit board, resulting in abnormal pure sound of the speaker and abnormal product performance.

technical problem

An object of the present invention is to provide a speaker, which aims to solve the problem that the lower diaphragm in the speaker in the prior art is likely to cause the folded portion of the lower diaphragm to collide with the flexible circuit board during vibration, resulting in poor pure sound of the product.

Technical solution

The technical solution of the present invention is as follows: A speaker is provided, which includes a basin holder with a receiving space, and a vibration system, a magnetic circuit system, and a flexible circuit board accommodated in the receiving space. An upper diaphragm at the upper end, a voice coil driving the upper diaphragm to vibrate and sound, and a lower diaphragm connected to the voice coil and fixed to the lower end of the basin frame, the lower diaphragm including the one connected to the voice coil A first clamping part, a second clamping part fixedly connected to the basin holder, and a folding part connecting the first clamping part and the second clamping part, and the flexible circuit board is interposed Between the voice coil and the first clamping portion, the folding ring portion includes a first connection portion connected to the first clamping portion and a second connection connected to the second clamping portion Part and an intermediate part connecting the first connection part and the second connection part, the first connection part includes a first end point connected to the first clamping part and a first part connected to the intermediate part Two end points, the second connecting part includes a third end point connected to the second clamping part and a fourth end point connected to the middle part, the tangent of the first end point along the vibration direction and the first end point The vertical distance between the tangents of the two end points along the vibration direction is the first distance, and the vertical distance between the tangents of the third end point along the vibration direction and the tangents of the fourth end point along the vibration direction is the second distance. The first pitch is smaller than the second pitch.

Further, the first distance is 0.

Further, the first connecting portion has a flat structure.

Further, the second connection part is an arc-shaped structure.

Further, the flexible circuit board includes a first fixing portion, a second fixing portion, and an elastic connection portion, the first fixing portion is connected to the basin frame, and the second fixing portion is connected to the voice coil. The elastic connection portion is connected between the first fixing portion and the second fixing portion, and an orthographic projection of the elastic connection portion in the vibration direction is spaced from the first connection portion.

Further, the materials of the upper diaphragm and the lower diaphragm are polymer materials.

Further, the polymer material is silica gel, rubber, PEEK or TPU.

Beneficial effect

The invention sets the vertical distance between the tangent of the first end point on the lower diaphragm along the vibration direction and the tangent of the second end point along the vibration direction to be smaller than the tangent of the third end point along the vibration direction and the fourth end point along the vibration direction The vertical distance between the tangents of the tangent line is conducive to improving the vibration space of the lower diaphragm, so that the first connection part can maintain a certain distance from the flexible circuit board during the vibration of the lower diaphragm, effectively avoiding the folding of the lower diaphragm The part collides with the flexible circuit board, which can improve the pure sound of the speaker, ensure the stability of the speaker, and improve the performance of the product.

BRIEF DESCRIPTION

1 is a schematic structural diagram of a speaker provided by an embodiment of the present invention;

2 is a schematic diagram of the exploded structure of FIG. 1;

FIG. 3 is a schematic sectional view of FIG. 1;

FIG. 4 is an enlarged schematic diagram of the area A in FIG. 3.

Embodiments of the invention

The present invention will be further described below with reference to the drawings and embodiments.

As shown in FIGS. 1 to 4, it is a speaker provided by an embodiment of the present invention. The speaker includes a fixing system 1 having a storage space, a vibration system 2 and a flexible circuit board 21 stored in the storage space. The fixing system 1 includes a pot holder 11 having a storage space, a fixing member 15 fixedly connected to the pot holder 11, and a magnetic circuit system 10 stored in the storage space of the pot holder 11. The magnetic circuit system 10 includes a magnetically conductive yoke 12 fixed to the basin frame 11, a main magnetic steel 13 provided at the middle of the magnetically conductive yoke 12, and a magnetic gap 18 disposed on both sides of the magnetically conductive yoke 12 and forming a magnetic gap 18 with the main magnetic steel 13 Vice magnet 14. The vibration system 2 includes an upper diaphragm 22 fixed to the upper end of the basin frame 11, a voice coil 24 that drives the upper diaphragm 22 to vibrate and sound, a flexible circuit board 21 fixed to the lower end of the voice coil 24, and an upper diaphragm fixed to the upper end of the voice coil 24 22 and the lower diaphragm 23 fixed to the lower end of the flexible circuit board 21, the voice coil 24 is placed in the magnetic gap 18, the inner upper end of the flexible circuit board 21 is fixed to the lower end of the voice coil 24, and the outer upper end of the flexible circuit board 21 is fixed to the basin On shelf 11.

The lower diaphragm 23 includes a first clamping portion 233 connected to the voice coil 24, a second clamping portion 232 fixedly connected to the basin holder 11, and a fold connecting the first clamping portion 233 and the second clamping portion 232 The ring portion 231, the flexible circuit board 21 is interposed between the voice coil 24 and the first clamping portion 233, and the folding ring portion 231 includes a first connection portion 2311 connected to the first clamping portion 233 and a second clamping portion A second connection portion 2313 connected by 232 and an intermediate portion 2312 connecting the first connection portion 2311 and the second connection portion 2313. The first connection portion 2311 includes a first end point 2314 connected to the first clamping portion 233 and a The second end 2315 connected to the middle part 2312. The second connection part 2313 includes a third end 2316 connected to the second clamping part 232 and a fourth end 2317 connected to the middle part 2312. The first end 2314 is along the vibration direction The vertical distance between the tangent line and the tangent line of the second endpoint 2315 along the vibration direction is the first interval, and the vertical distance between the tangent line of the third endpoint 2316 along the vibration direction and the tangent line along the vibration direction of the fourth endpoint 2317 is the second interval, The first pitch is smaller than the second pitch. The voice coil 24 drives the upper diaphragm 22 to vibrate and sound, and drives the lower diaphragm 23 and the flexible circuit board 21 to vibrate. Through the structure of the lower diaphragm 23 described above, the vibration space of the lower diaphragm 23 is improved, so that there is a larger space between the folded portion of the lower diaphragm 23 and the flexible circuit board 21, so that the lower diaphragm 23 is in the process of vibration, The first connecting portion 2311 can maintain a certain distance from the flexible circuit board 21, effectively avoiding the collision of the folded portion 231 of the lower diaphragm 23 and the flexible circuit board 21, thereby improving the pure sound of the speaker and ensuring the stability of the speaker.

In this embodiment, in order for the lower diaphragm 23 to obtain a larger vibration space that is not interfered by the flexible circuit board 21, the first pitch is 0, that is, the first connecting portion 2311 and the intermediate portion 2312 form an angle of 90 degrees. The first connection portion 2311 has a flat plate structure, and the second connection portion 2313 has an arc structure. In other embodiments, the first connecting portion 2311 and the second connecting portion 2313 can also be structures of other shapes, and the angle between the middle portion 2312 and the first connecting portion 2311 can be an obtuse angle, and the specific angle is adjusted according to actual needs. The structure of the diaphragm 23 is adjusted.

In the above embodiment, the flexible circuit board 21 includes the first fixing portion 211, the second fixing portion 212, and the elastic connecting portion 213. The upper end of the first fixing portion 211 is fixedly connected to the basin 11 and the lower end of the first fixing portion 211 is The second clamping portion 232 of the diaphragm 23 is fixedly connected, the upper end of the second fixing portion 212 is connected to the voice coil 24, the lower end of the second fixing portion 212 is fixedly connected to the first clamping portion 233 of the lower diaphragm 23, and is elastically connected The portion 213 is connected between the first fixing portion 211 and the second fixing portion 212, and the orthographic projection of the elastic connection portion 213 in the vibration direction is spaced from the first connection portion 2311.

In the above embodiment, the fixing system 1 further includes a pole core 17, which is fixed to the side of the main magnetic steel 13 away from the magnetic yoke 12. Among them, the magnetic yoke 12, the fixing member 15 and the pole core 17 are made of magnetically conductive material, the material of the upper diaphragm 22 and the lower diaphragm 23 is a polymer material, the polymer material is silica gel, rubber, PEEK (polyetheretherketone Polyetheretherketone) or TPU (Thermoplastic polyurethanes (thermoplastic polyurethane elastomer rubber), etc.

In the above embodiment, the shape of the voice coil 24 is a racetrack shape, or other ring-shaped structures may be used. The voice coil 24 drives the upper diaphragm 22, the upper diaphragm 22 is fixed on the basin frame 11, and the upper diaphragm 22 is also fixed There is a reinforcing plate 16, which can be provided on the side of the upper diaphragm 22 facing the main magnetic steel 13, or on the side of the upper diaphragm 22 facing away from the main magnetic steel 13, the reinforcing plate 16 can raise the upper diaphragm 22 Stability.

In summary, the speaker of the present invention improves the shape and structure of the lower diaphragm 23 so that the tangent of the first endpoint 2314 on the lower diaphragm 23 along the vibration direction and the tangent of the second endpoint 1315 along the vibration direction The vertical distance between them is set to be smaller than the vertical distance between the tangent of the third endpoint 2316 in the vibration direction and the tangent of the fourth endpoint 2317 in the vibration direction, which is beneficial to improve the vibration space of the lower diaphragm 23 so that the lower diaphragm 23 vibrates During the process, the first connecting portion 2311 can maintain a certain distance from the flexible circuit board 21, effectively avoiding the collision of the folded portion 231 of the lower diaphragm 23 and the flexible circuit board 21, thereby improving the pure sound of the speaker and ensuring the speaker Stability, improve product performance.

The above are only the embodiments of the present invention. It should be noted here that those of ordinary skill in the art can make improvements without departing from the inventive concept of the present invention, but these belong to the present invention. Scope of protection.

Claims

A loudspeaker includes a basin holder with an accommodation space, and a vibration system, a magnetic circuit system and a flexible circuit board accommodated in the accommodation space. The vibration system includes an upper diaphragm fixed to the upper end of the basin holder and a driving station A voice coil that vibrates and sounds from the upper diaphragm and a lower diaphragm connected to the voice coil and fixed to the lower end of the basin frame, characterized in that the lower diaphragm includes a first clamp connected to the voice coil Part, a second clamping part fixedly connected to the basin holder, and a folding part connecting the first clamping part and the second clamping part, the flexible circuit board is clamped on the sound Between the ring and the first clamping portion, the folded ring portion includes a first connection portion connected to the first clamping portion, a second connection portion connected to the second clamping portion, and a connection place An intermediate part of the first connection part and the second connection part, the first connection part includes a first end point connected to the first clamping part and a second end point connected to the middle part, so The second connection part includes a third end point connected to the second clamping part and a fourth end point connected to the middle part, the tangent of the first end point along the vibration direction and the second end point vibrate The vertical distance between the tangents in the direction is the first distance, the vertical distance between the tangent of the third end point along the vibration direction and the tangent along the vibration direction is the second distance, and the first distance is less than The second pitch.
The speaker according to claim 1, wherein the first pitch is 0.
The speaker according to claim 1, wherein the first connecting portion has a flat plate structure.
The loudspeaker according to claim 1, wherein the second connecting portion has an arc structure.
The speaker according to any one of claims 1 to 4, wherein the flexible circuit board includes a first fixing portion, a second fixing portion, and an elastic connection portion, the first fixing portion and the basin stand Connection, the second fixing portion is connected to the voice coil, the elastic connection portion is connected between the first fixing portion and the second fixing portion, the orthographic projection of the elastic connection portion along the vibration direction is The first connection portions are spaced from each other.
The speaker according to claim 1, wherein the materials of the upper diaphragm and the lower diaphragm are polymer materials.
The speaker according to claim 6, wherein the polymer material is silicone, rubber, PEEK or TPU.