WO2021128087A1

WO2021128087A1 - Speaker unit

Info

Publication number: WO2021128087A1
Application number: PCT/CN2019/128415
Authority: WO
Inventors: 张古清
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: 2019-12-25
Filing date: 2019-12-25
Publication date: 2021-07-01

Abstract

The present application provides a speaker unit, comprising a basin frame having an accommodation space, and a magnetic circuit system and a vibration system which are accommodated in the accommodation space. The vibration system comprises a voice coil and a vibrating diaphragm assembly; and the vibrating diaphragm assembly comprises a vibrating diaphragm fixed to the basin frame and a ball top attached to the vibrating diaphragm, the ball top being provided with at least one opening. Compared with the related art, the speaker unit of the present application reduces the weight of the ball top by providing the opening on the ball top, thereby effectively improving the sensitivity of the vibrating diaphragm.

Description

Speaker unit

Technical field

The utility model relates to the field of sound-electric conversion, in particular to a speaker unit.

Background technique

With the development of the electronics industry and the improvement of people's lifestyles, micro speakers are increasingly used in electronic products. As one of the important components of electronic products, micro speakers have higher and higher sensitivity requirements.

As shown in Figure 1, in the prior art, the voice coil 3'is used to vibrate to drive the diaphragm 1'to produce sound, wherein the diaphragm 1'is glued to the dome 2', the dome 2'is heavier, and the sensitivity to the diaphragm is Influence, when considering improving the sensitivity of the diaphragm to sound, it is necessary to improve the existing structure to increase the sensitivity.

Summary of the invention

technical problem

Aiming at the problem of insufficient sensitivity of the diaphragm in the prior art, the present invention provides a speaker unit with better sensitivity.

The solution to the problem

Technical solutions

A speaker unit includes a basin frame with an accommodation space and a magnetic circuit system and a vibration system accommodated in the accommodation space. The vibration system includes a voice coil and a diaphragm assembly, and the diaphragm assembly includes a The diaphragm of the basin frame and the dome attached to the diaphragm, and the dome is provided with at least one opening.

Preferably, the speaker unit further includes a front cover, and the front cover is fixedly connected with the basin frame to form a receiving space, and the diaphragm is sandwiched between the front cover and the basin frame.

Preferably, the diaphragm includes a sound diaphragm, a folding ring portion extending outward from the sound diaphragm, and a fixing portion extending outward from the folding ring portion, and the fixing portion is fixedly connected to the basin frame.

Preferably, the fixing part is sandwiched between the front cover and the basin frame.

Preferably, the front cover and the basin frame are fixedly connected by a four-corner connector to form the receiving space.

Preferably, the dome is provided with two openings, and the two openings are symmetrically distributed along the long axis direction of the dome.

Preferably, the projection of the opening on the diaphragm along the vibration direction of the diaphragm is rectangular.

Preferably, the dome top is attached to a side of the diaphragm close to the receiving space.

The beneficial effects of the invention

Beneficial effect

Compared with the related art, the speaker unit of the present invention reduces the weight of the dome by opening the dome, and effectively improves the sensitivity of the sound film.

Brief description of the drawings

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:

Fig. 1 is a partial structural diagram of a speaker unit in the prior art;

Figure 2 is a schematic diagram of the three-dimensional structure of the speaker unit provided by the utility model;

FIG. 3 is a schematic diagram of an exploded structure of the speaker unit shown in FIG. 2;

Figure 4 is a schematic plan view of the dome shown in Figure 2;

Figure 5 is a cross-sectional view taken along line A-A in Figure 2;

FIG. 6 is an enlarged schematic diagram of the part Y shown in FIG. 5.

Invention embodiment

Detailed ways

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 Figure 2 to Figure 6 together. The utility model provides a speaker unit 100, which includes a basin frame 10 with a receiving space 111, and a magnetic circuit system 30 and a vibration system 50 accommodated in the receiving space 111. The vibration system 50 includes a voice coil 51 And the diaphragm assembly 52, the diaphragm assembly 52 includes a diaphragm 521 fixed to the basin frame 10 and a dome 522 attached to the diaphragm 521, and the dome 522 is provided with at least one opening 5221 .

The speaker unit 100 further includes a front cover 70, the front cover 70 is fixedly connected to the basin frame 10 to form a receiving space 111, and the diaphragm 521 is sandwiched between the front cover 70 and the basin frame 10. between. The front cover 70 and the basin frame 10 are fixedly connected by a four-corner connector 110 to form an accommodation space 111, and the magnetic circuit system 30 and the vibration system 50 are accommodated in the accommodation space 111. In an embodiment, the four-corner connecting member 110 may be a screw or a bolt.

The magnetic circuit system 30 includes a magnetic yoke 31, a main magnetic steel 32 and a secondary magnetic steel 33 assembled on the magnetic yoke 31, a main pole core 34 superimposed on the main magnetic steel 32, and a main pole core 34 superimposed on the main magnetic steel 32. As for the secondary pole core 35 on the secondary magnet 33, the secondary magnet 33 and the main magnet 32 are spaced apart to form a magnetic gap 36; the voice coil 51 is at least partially inserted into the magnetic gap 36.

The speaker unit 100 further includes an elastic supporting member 112 and a fixing member 113, and the fixing member 113 is used to further fix the basin frame 10 and the magnetic yoke 31. The main magnet 32 and the two auxiliary magnets 33 are attached to the yoke 31, the main pole core 34 is stacked on the main magnet 32, and the two auxiliary pole cores 35 are stacked respectively. Are arranged on the two auxiliary magnets 33, the two auxiliary magnets 33 are symmetrically arranged on both sides of the main magnet 32, and the main magnet 32 and the two auxiliary magnets 33 are on the same plane, The main pole core 34 and the two secondary pole cores 35 are on the same plane; the main magnetic steel 32 and the two secondary magnetic steels 33 form a magnetic gap 36 respectively.

The diaphragm 521 includes a sound diaphragm 5213, a folding ring portion 5215 extending outward from the sound diaphragm 5213, and a fixing portion 5217 extending outward from the folding ring portion 5215. The fixing portion 5217 is connected to the basin frame. 10 is fixedly connected; specifically, the fixing portion 5217 is sandwiched between the front cover 70 and the basin frame 10.

Please refer to Figure 4, Figure 5 and Figure 6 together. Figure 4 shows a schematic view of the opening of the dome 522. Figure 5 shows a cross-sectional view of the loudspeaker shown in Figure 2 along AA. Figure 6 shows the position Y in Figure 5 Magnified schematic diagram of. The dome 522 is attached to a side of the sound film 5213 close to the receiving space 111. Specifically, in this embodiment, the dome 522 is provided with two openings: a first opening 5221 and a second opening 5222. The two first openings 5221 and the second opening 5222 are located along the The long axis directions of the dome 521 are symmetrically distributed. Such a design can balance the weight of the dome and optimize the sound quality; the projection of the opening on the diaphragm 521 along the vibration direction of the diaphragm 521 is rectangular. In other embodiments, the opening on the dome 52 includes other shapes or sizes, which is not limited by the present invention.

Compared with the related art, the speaker unit of the present invention reduces the weight of the dome by opening the dome, and effectively improves the sensitivity of the diaphragm.

The above are only the embodiments of the present utility model. 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 utility model, but these all belong to The scope of protection of the utility model.

Claims

A speaker unit includes a basin frame with an accommodation space and a magnetic circuit system and a vibration system accommodated in the accommodation space. The vibration system includes a voice coil and a diaphragm assembly, and the diaphragm assembly includes a The diaphragm of the basin frame and the dome attached to the diaphragm are characterized in that the dome is provided with at least one opening.
The speaker unit according to claim 1, wherein the speaker unit further comprises a front cover, the front cover is fixedly connected with the basin frame to form a receiving space, and the diaphragm is sandwiched between the front Between the cover and the basin frame.
The speaker unit according to claim 2, wherein the diaphragm includes a sound film, a folding ring part extending outward from the sound film, and a fixing part extending outward from the folding ring part, so The fixing part is fixedly connected with the basin frame.
The speaker unit according to claim 3, wherein the fixing portion is sandwiched between the front cover and the basin frame.
The speaker unit according to claim 2, wherein the front cover and the basin frame are fixedly connected by a four-corner connector to form the receiving space.
The speaker unit according to claim 1, wherein the dome is provided with two openings, and the two openings are symmetrically distributed along the long axis direction of the dome.
The speaker unit according to claim 1, wherein the projection of the opening on the diaphragm along the vibration direction of the diaphragm is rectangular.
The speaker unit according to claim 1, wherein the dome is attached to a side of the diaphragm close to the receiving space.