WO2021258410A1

WO2021258410A1 - Voice diaphragm and loudspeaker

Info

Publication number: WO2021258410A1
Application number: PCT/CN2020/099085
Authority: WO
Inventors: 宋威; 钟志威; 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: 2020-06-22
Filing date: 2020-06-30
Publication date: 2021-12-30
Also published as: CN212628396U

Abstract

Provided in the present application are a voice diaphragm and a loudspeaker. The voice diaphragm comprises a central dome and a folding ring extending around the dome, wherein the folding ring comprises a middle part and a first fixing part, which extends towards the dome along an inner periphery of the middle part; and the first fixing part is connected to the dome by means of gluing, and is provided with a gluing surface bonded to the dome. By means of a side of the gluing surface of the first fixing part, which side is close to the middle part and surrounds the dome to form a retaining wall surrounding the dome in a circle, a limiting feature can be provided for the assembly of the dome and the folding ring, thereby achieving a better concentricity level of the dome and the folding ring. In addition, the retaining wall can effectively prevent glue from overflowing and contaminating the folding ring, and the intercepted overflowing glue can accumulate in a height direction to cover more of a side wall of the dome, thereby increasing the gluing area of the dome and the folding ring, facilitating the improvement of the gluing force between the dome and the folding ring, and reducing the risk of the dome separating from the voice diaphragm.

Description

Sound film and loudspeaker

Technical field

This application relates to the technical field of sound-to-electric conversion, in particular to a sound film and a loudspeaker.

Background technique

With the development of technology, more and more electronic devices have built-in speakers. Generally, the speaker will provide a uniform magnetic field through the magnetic steel, so that the voice coil with alternating current will vibrate in the uniform magnetic field, and the voice coil will drive the diaphragm to vibrate to make the speaker produce sound.

The sound film of the prior art can be formed by the cooperation of the folding ring and the dome. The sound film structure needs to indirectly locate and assemble the folding ring and the dome with the help of tooling and other parts. After the fixed part of the folding ring and the dome are bonded, the overflow glue will comply with The glue spreads out in a fluid state, and it may directly contaminate the folding ring when it is serious. The degree of this glue overflow is uncontrollable, and the state of the glue overflow in a week is inconsistent.

Therefore, it is necessary to provide a new sound film and speaker.

technical problem

The purpose of this application is to provide a sound film and a loudspeaker. By providing a retaining wall between the folding ring and the first fixing part, the dome and the folding ring can be assembled with limiting features, and the overflow of glue can be intercepted to avoid overflow of the glue. To the fold ring.

Technical solutions

The technical solution of the present application is as follows: a sound film, the sound film includes a dome located in the center and a folding ring extending around the dome, the folding ring includes a middle part and a direction along the inner periphery of the middle part The first fixing portion extending from the dome, the first fixing portion is glued and connected to the dome, the first fixing portion is provided with a glued surface bonded to the dome, the first fixing portion A retaining wall is provided on one side of the glued surface close to the middle portion, and the retaining wall is in a ring shape corresponding to the first fixing portion and surrounds the dome. The retaining wall and the dome A gap is formed therebetween, and the gap is used for accommodating the overflow glue after the dome and the first fixing part are glued.

Preferably, the retaining wall includes four straight side portions and four rounded corner portions respectively connecting two adjacent straight side portions, and the height of the rounded corner portion in the vibration direction of the sound film is greater than that of the straight side portion The height in the vibration direction of the sound membrane.

Preferably, the folding ring further includes a second fixing portion extending away from the first fixing portion along the outer periphery of the middle portion, and an end of the second fixing portion away from the middle portion facing away from the The second fixing part is bent and extended to the third fixing part.

Preferably, the middle portion is a convex structure, the convex structure is surrounded by a rounded rectangle, and the convex structure at the corresponding rounded corner is provided with concave folds.

The present application also provides a speaker. The speaker includes a frame, a magnetic circuit system arranged in the frame, and a vibration system connected to the frame and the magnetic circuit system. The magnetic circuit system drives the Describe the vibration of the vibration system,

The vibration system includes a first sound membrane fixed to the frame, and the first sound membrane includes the above-mentioned sound membrane structure.

Preferably, the second fixing part and the third fixing part of the first sound film abut against the frame, and the vibration system further includes a voice coil arranged in the magnetic gap of the magnetic circuit system, and The vibrating ring between the voice coil and the dome of the first sound film.

Preferably, the vibration system further includes a skeleton sleeved outside the voice coil and abutting against the frame, and a flexible circuit abutting against the skeleton and the vibrating ring on the side away from the first sound film A board and a second sound film abutting on a side of the flexible circuit board away from the frame.

Preferably, the vibrating ring includes a rounded rectangular main body that abuts against the voice coil one round, and a bracket extending from the rounded corners of the main body toward the flexible circuit board, and the bracket abuts against the flexible circuit board. catch.

Preferably, the magnetic circuit system includes a lower splint, a main magnetic steel component arranged on the lower splint and a secondary magnetic steel component surrounding the main magnetic steel component, the secondary magnetic steel component and the main magnetic steel component The magnetic gap is formed between the magnetic steel components.

Preferably, the auxiliary magnet assembly includes a pair of first auxiliary magnets that clamp the skeleton and a second auxiliary magnet that abuts on the side of the skeleton away from the first sound film, and the flexible circuit The board and the second sound film are surrounded by the second auxiliary magnetic steel.

Beneficial effect

The beneficial effect of the present application is to provide a sound film and a loudspeaker, the sound film comprising: a central dome and a folding ring extending around the dome, the folding ring including a middle part and a speaker along the middle part A first fixing portion extending from the inner periphery of the dome to the dome, the first fixing portion is glued and connected to the dome, and the first fixing portion is provided with a glued surface bonded to the dome. The glued surface of the first fixing part is close to the middle part to form a retaining wall surrounding the dome. The folding ring is concentric; in addition, the retaining wall can effectively intercept the overflow of glue and contaminate the folding ring. The intercepted overflow can accumulate in the height direction, wrapping more dome side walls, and increasing the gluing area of the dome and folding ring. It is beneficial to improve the bonding force between the dome and the folding ring, reduce the risk of separation between the dome and the sound film, and improve the symmetry of the vibration system.

Description of the drawings

FIG. 1 is a schematic diagram of the sound film structure of an embodiment of the application;

Figure 2 is an exploded structure diagram of the sound membrane in Figure 1;

Fig. 3 is a cross-sectional view of the middle sound film of Fig. 1 along the line A-A;

Figure 4 is a schematic diagram of the structure of the speaker of the application;

Fig. 5 is a partial exploded structural diagram of the speaker in Fig. 4;

Fig. 6 is an exploded structural diagram of the loudspeaker in Fig. 4;

Fig. 7 is a cross-sectional view of the loudspeaker in Fig. 4 along the line B-B.

Brief description of the drawings: sound film 100; dome 110; folding ring 120; middle part 121; first fixed part 122; retaining wall 123; right-angled part 1231; rounded part 1232; overflow glue 124; Three fixed part 126; fold 127; glued surface 128; speaker 200; frame body 1; vibration system 2; voice coil 21; vibrating ring 22; main body 221; bracket 222; frame 23; The second sound film 25; the magnetic circuit system 3; the lower splint 31; the main magnet assembly 32; the auxiliary magnet assembly 33; the first auxiliary magnet 331; the second auxiliary magnet 332.

Embodiments of the present invention

The application will be further described below in conjunction with the drawings and implementations.

Please refer to FIGS. 1 to 3, an embodiment of the present application provides a sound film 100. The sound film 100 includes a dome 110 at the center and a folding ring 120 extending around the dome 110. The folding ring 120 includes a middle part 121 and a first fixing part 122 extending along the inner periphery of the middle part 121 toward the dome 110. The first fixing part 122 is provided with a glue surface 128. The top 110 is glued and connected. The glued surface 128 of the first fixing part 122 is provided with a retaining wall 123 on the side close to the middle part 121. A gap is provided between 123 and the dome 110, and the gap is used for accommodating the overflow glue 124 after the dome 110 and the first fixing portion 122 are glued.

In the sound film 100 of the embodiment of the present invention, by providing a ring-shaped retaining wall 123 surrounding the dome 110 on the side of the first fixing portion 122 close to the middle portion 121, the dome 110 and the folding ring 120 can be assembled and provided Limiting features, to achieve a better level of concentricity of the dome 110 and the folding ring 120; in addition, the dome 110 in the sound film 100 lies in the first fixing part 122 after the glue 124 is bonded by the one-round retaining wall 123, and the overflow The glue 124 can accumulate in the direction of vibration to wrap more side walls of the dome 110, increase the bonding area of the dome 110 and the folding ring 120, and help improve the bonding force between the dome 110 and the folding ring 120. The risk of separation between the folding ring 120 and the dome 110 is reduced.

In an alternative embodiment, referring to Figures 2 and 3, the dome 110 is a rectangle with rounded corners, and the retaining wall 123 includes four straight side portions 1231 and four circles respectively connecting two adjacent straight side portions 1231 The corners 1232, the rounded corners 1232 correspond to the four rounded corners of the dome 110, the right corners 1232 correspond to the rectangular sides of the dome 110, the height of the rounded corners 1232 in the vibration direction of the sound film 100 is greater than that of the straight sides 1231 where the sound film vibrates The height of the direction. Through the setting of the retaining wall 123, while intercepting the overflow glue 124 in the retaining wall 123, the rounded corners 1232 are locally heightened to ensure the effect of intercepting the overflow glue 124, and the symmetry of the vibration system 2 where the sound membrane 100 is located is improved.

In an alternative embodiment, referring to FIGS. 2 and 3, the folding ring 120 further includes a second fixing portion 125 extending away from the first fixing portion 122 along the outer periphery of the middle portion 121, and the second fixing portion 125 is far away One end of the middle portion 121 is bent and extends away from the second fixing portion 125 to form a third fixing portion 126. Both the second fixing portion 125 and the third fixing portion 126 can be provided with adhesive surfaces. By providing the third fixing portion 126, the bonding area of the second fixing portion 125 can be increased, and the sound membrane 100 can be assembled firmly.

In an alternative embodiment, please refer to FIGS. 2 and 3, the middle part 121 is a convex structure, the convex structure is surrounded by a rounded rectangle, and the convex structure at the corresponding rounded corner is provided with concave folds 127 .

This application also provides a speaker 200. Please refer to FIGS. 4-7. The speaker 200 includes a frame 1, a magnetic circuit system 3 arranged in the frame 1, and a vibration system connected to the frame 1 and the magnetic circuit system 3 2. The magnetic circuit system 3 drives the vibration system 2 to vibrate. The vibration system 2 includes a first sound membrane fixed to the frame 1, and the first sound membrane includes the structure of the sound membrane 100 described above.

In an alternative embodiment, referring to FIGS. 6-7, the second fixing portion 125 of the sound film 100 is bonded to the top of the frame 1, and the third fixing portion 126 is bonded to the side wall of the frame 1. The vibration system 2 also includes a voice coil 21 arranged in the magnetic gap of the magnetic circuit system 3, a vibration ring 22 sandwiched between the voice coil 21 and the dome 110 of the sound film 100, and the middle part 121 of the sound film 100 faces away from the vibration ring. 22 convex. Optionally, the voice coil 21 is a rectangle with rounded corners, the vibrating ring 22 includes a main body 221 abutting the top of the voice coil 21, the main body 221 is a rounded rectangle, and a bracket 222 extends from the rounded corners of the main body 221. There are 4 brackets 222 in the embodiment.

In an alternative embodiment, please refer to FIGS. 5-7, the vibration system 2 further includes a skeleton 23 arranged between the voice coil 21 and the frame 1, and the skeleton 23 abuts against the voice coil 21 and the frame 1, respectively ; The flexible circuit board 24 abutting on the side of the frame 23 and the vibrating ring 22 away from the sound film 100 and the second sound film 25 that abuts on the side of the flexible circuit board 24 away from the frame 23. Preferably, the flexible circuit board 24 is a pair, and each of the flexible circuit boards 24 is provided in the short axis direction of the speaker 200. The second sound membrane 25 is also provided with a pair, which is arranged corresponding to the flexible circuit board 24. Optionally, the bracket 222 abuts against the flexible circuit board 24. Both the bracket 222 and the skeleton 23 abut against the flexible circuit board 24, and the bracket 222 is disposed at the relief portion 231 in the skeleton 23.

In an alternative embodiment, referring to Figures 5 and 7, the magnetic circuit system 3 includes a lower splint 31. The center of the lower splint 31 is provided with a main magnet assembly 32 and a secondary magnet surrounding the main magnet assembly 32. The steel component 33, the secondary magnetic steel component 33 and the main magnetic steel component 32 form a magnetic gap. The auxiliary magnet assembly 33 is in contact with the frame 23. Optionally, the auxiliary magnet assembly 33 includes a pair of first auxiliary magnets 331 that clamp the frame 23 and a second auxiliary magnet that abuts on the side of the frame 23 away from the sound film 100. The magnetic steel 332, the flexible circuit board 24 and the second sound film 25 are surrounded by the second auxiliary magnetic steel 332.

The above are only the implementation manners of this application. It should be pointed out here that for those of ordinary skill in the art, improvements can be made without departing from the creative concept of this application, but these are all protected by this application. Scope.

Claims

1. A sound film, characterized in that the sound film includes a dome located in the center and a folding ring extending around the dome, the folding ring includes a middle part and an inner circumference of the middle part. The first fixing part extending from the dome, the first fixing part is glued and connected to the dome, the first fixing part is provided with a glued surface that is bonded to the dome, the first fixing part is A retaining wall is provided on one side of the glued surface close to the middle portion, and the retaining wall is in a ring shape corresponding to the first fixing portion and surrounds the dome. A gap is formed between the gap, and the gap is used for accommodating the overflow glue after the dome and the first fixing part are glued.

2. The sound film according to claim 1, wherein the retaining wall includes four straight side portions and four rounded corners respectively connecting two adjacent straight side portions, and the rounded corners are located at the The height of the vibration direction of the sound membrane is greater than the height of the straight side portion in the vibration direction of the sound membrane.

3. The sound film according to claim 2, wherein the folding ring further comprises a second fixing portion extending away from the first fixing portion along the outer periphery of the middle portion, and a second fixing portion extending from the second fixing portion. One end of the fixing portion away from the middle portion faces a third fixing portion bent and extending away from the second fixing portion.

4. The sound film according to claim 3, wherein the middle portion is a convex structure, the convex structure is surrounded by a rounded rectangle, and the convex structure at the corresponding rounded corner is provided with a concave Folds.

5. A speaker, characterized in that the speaker comprises a frame, a magnetic circuit system arranged in the frame, and a vibration system connected to the frame and the magnetic circuit system, and the magnetic circuit system drives The vibration system vibrates,

The vibration system includes a first sound membrane fixed to the frame, and the first sound membrane includes the sound membrane according to any one of claims 1-4.

6. The speaker of claim 5, wherein:

The second fixing part and the third fixing part of the first sound film are in contact with the frame, and the vibration system further includes a voice coil arranged in the magnetic gap of the magnetic circuit system and sandwiched between the sound The vibrating ring between the ring and the dome of the first sound film.

7. The speaker of claim 6, wherein:

The vibration system also includes a skeleton sleeved outside the voice coil and abutting against the frame, a flexible circuit board abutting against the skeleton and the vibrating ring on the side away from the first sound film, and The flexible circuit board is away from the second sound film abutting on one side of the frame.

8. The speaker of claim 7, wherein the vibrating ring comprises a rounded rectangular main body that abuts on the voice coil one round, and a rounded rectangular main body extending from the rounded corners of the main body toward the flexible circuit board. The bracket abuts against the flexible circuit board.

9. The loudspeaker of claim 7, wherein the magnetic circuit system comprises a lower splint, a main magnetic steel assembly arranged on the lower splint and a secondary magnetic steel surrounding the main magnetic assembly Component, the magnetic gap is formed between the secondary magnetic steel component and the main magnetic steel component.

10. The loudspeaker according to claim 9, wherein the auxiliary magnetic steel assembly comprises a pair of first auxiliary magnetic steels clamping the skeleton and a pair of first auxiliary magnetic steels that are opposed to the side of the skeleton away from the first sound film. The second auxiliary magnetic steel connected, the flexible circuit board and the second sound film are surrounded by the second auxiliary magnetic steel.