WO2021134280A1

WO2021134280A1 - Skeleton and loudspeaker

Info

Publication number: WO2021134280A1
Application number: PCT/CN2019/130068
Authority: WO
Inventors: 胡洪建
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: 2019-12-30
Filing date: 2019-12-30
Publication date: 2021-07-08

Abstract

Provided by the present application are a skeleton and a loudspeaker. The skeleton comprises a joint part provided between a voice coil and a main voice diaphragm. The joint part comprises a first glue connecting layer, a connection layer, and a second glue connecting layer that are sequentially stacked. The first glue connecting layer is provided with a first glued surface bonded to the main voice diaphragm. The second glue connecting layer is provided with a second glued surface bonded to the voice coil. A projection of the first glued surface on the second glue connecting layer along the stacking direction of the joint part overlaps with the second glued surface. The strength of the skeleton is enhanced by means of providing the joint part of the stacked structure, and the first glued surface and the second glued surface that have overlapping projections are provided on the stacked structure, so that the skeleton is not easily deformed by being squeezed during the assembly process of the loudspeaker, the adhesion between the voice coil, the skeleton and the main voice diaphragm is kept highly firm, and the stability of the acoustic performance of the loudspeaker is maintained during the process in which the voice coil drives the main voice diaphragm to vibrate and produce sound.

Description

A kind of skeleton and loudspeaker

Technical field

This application relates to the technical field of electro-acoustic conversion, and in particular to a skeleton and a speaker.

Background technique

In the prior art, the sound film and the voice coil in the speaker are directly glued and fixed. Direct gluing and fixing will cause glue overflow on both sides of the voice coil, causing the glue to occupy the vibration space of the sound film, reducing the actual vibration space of the sound film. , Which affects the acoustic performance of the speaker; or the sound film and the voice coil in the speaker are bonded by setting the bonding skeleton with interlaced bonding surfaces. The support strength of this bonding form is weak, which makes the speaker sticky during the assembly process. The connecting frame is easily deformed, which makes the gluing surface between the sound film and the voice coil misaligned, resulting in the weak bonding between the sound film and the voice coil, which affects the acoustic performance of the speaker.

Therefore, it is necessary to provide a frame and speaker to solve the above-mentioned drawbacks. technical problem

The purpose of the present application is to provide a skeleton having a joint part arranged in a stack, and the joint part has a first gluing surface and a second gluing surface that overlap in projection along the stacking direction. .

Summary of the invention

technical problem

The solution to the problem

Technical solutions

The technical solution of the present application is based on the following: a skeleton for connecting a voice coil and a main sound film, the skeleton including a joint part arranged between the voice coil and the main sound film, and the joint part is continuous by a substrate Bending to form a stacked structure, the joint includes a first glue connection layer, a connection layer, and a second glue connection layer stacked in sequence, and the first glue connection layer is provided with a first glue that is bonded to the main sound film. The second glue connection layer is provided with a second glue surface that is bonded to the voice coil, and the projection of the first glue surface on the second glue connection layer along the stacking direction of the joint is consistent with The second glued surface at least partially overlaps.

Preferably, the joint portion further includes a first bending portion connecting the first glue connecting layer and the connecting layer and a second bending portion connecting the connecting layer and the second glue connecting layer, so The first bending part and the second bending part are arranged at both ends of the connecting layer.

Preferably, the joint portion forms a continuous joint frame.

Preferably, the frame further includes a bracket part arranged on the joint frame, and the bracket part encloses a hollow cavity for accommodating the voice coil.

Preferably, the bracket part includes a plurality of brackets spaced apart from the joint frame.

The present application also provides a loudspeaker. The loudspeaker includes a basin frame and a magnetic circuit system and a vibration system fixed in the basin frame. The magnetic circuit system generates a magnetic field to drive the vibration system to emit sound; the vibration The system includes a main sound film, a voice coil arranged under the main sound film to drive the main sound film to vibrate, and the skeleton according to any one of claims 1-5 arranged between the main sound film and the voice coil.

Preferably, the main sound film includes a folding ring portion and a dome top, the folding ring portion includes a middle portion, a first fixing portion extending inward from the inner periphery of the middle portion, and a first fixing portion extending outward from the outer periphery of the middle portion. The second fixing portion; the dome top is provided on the upper surface of the first fixing portion, the lower surface of the first fixing portion is provided on the first glued surface of the skeleton, the second fixing portion The lower surface is set on the top edge of the basin frame.

Preferably, the magnetic circuit system includes a magnetic yoke, a main magnetic steel arranged on the magnetic yoke, a main pole core attached to the main magnetic steel, and a secondary magnet surrounding the main magnetic steel. steel;

The voice coil ring is arranged in the magnetic gap between the main magnet and the auxiliary magnet.

Preferably, the vibration system further comprises a circuit board abutting against the bottom end of the basin frame and the bottom end of the bracket part of the frame, one end of the circuit board is connected to the external circuit, and the other end is connected to the The voice coil is connected.

Preferably, the vibration system further includes an auxiliary sound film abutting on the lower surface of the circuit board.

The beneficial effects of the invention

Beneficial effect

The beneficial effect of the present application is that a framework and a speaker are provided, the framework includes a joint between the voice coil and the main sound film, and the joint is continuously bent by a substrate to form a stacked structure , The joint includes a first glue connection layer, a connection layer and a second glue connection layer stacked in sequence, the first glue connection layer is provided with a first glue surface bonded to the main sound film, and the second glue connection layer is The glue connection layer is provided with a second glue surface that is bonded to the voice coil, and the projection of the first glue surface on the second glue connection layer along the stacking direction of the joint is and the second glue surface At least partially overlap. By arranging the joint part of the stacked structure, the strength of the skeleton is enhanced. On the stacked structure, the first glued surface and the second glued surface whose projections are at least partially overlapped are arranged, so that the skeleton is not easily deformed when the speaker is squeezed during the assembly process. , To maintain the high degree of adhesion between the voice coil, the frame and the main sound membrane, and maintain the stability of the acoustic performance of the speaker when the voice coil drives the main sound membrane to vibrate and produce sound together.

Brief description of the drawings

Description of the drawings

FIG. 1 is a schematic diagram of the structure of the skeleton of the embodiment of the present application.

Fig. 2 is a schematic diagram of an exploded structure of a speaker according to an embodiment of the present application.

Fig. 3 is a schematic diagram of the structure of a speaker according to an embodiment of the present application.

4 is a schematic diagram of the A-A cross-sectional structure of the loudspeaker of the embodiment of the present application.

FIG. 5 is a schematic diagram of an enlarged structure of a part E of a speaker according to an embodiment of the present application.

Brief description of the drawings: 1. Basin frame; 2. Magnetic circuit system; 21. Main pole core; 22. Main magnet; 23. Sub-magnet; 231. First sub-magnet; 232; Second sub-magnet; 24 3. Magnetic yoke; 3. Vibration system; 31, main sound film; 311, folding ring part; 3111, first fixed part; 3112, second fixed part; 3113, middle part; 312, dome top; 32, skeleton; 321, Joint; 3211, the first glue connection layer; 3212, the second glue connection layer; 3213, the connection layer; 3214, the first bending part; 3215, the second bending part; B, the first bonding surface; C, the first Two glued surfaces; 322, bracket part; 33, voice coil; 34, circuit board; 35, auxiliary sound film.

Invention embodiment

Embodiments of the present invention

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

The present application provides a skeleton and a speaker. The skeleton is used in a speaker to connect the voice coil and the main sound film. In order to facilitate understanding, the following content specifically introduces the structure of the skeleton in the speaker.

The speaker 100 of the embodiment of the present application is shown in FIGS. 2-4. FIG. 2 shows a schematic diagram of the exploded structure of the speaker 100 of the embodiment of the present application. FIG. 3 shows a schematic diagram of the structure of the speaker 100 of the embodiment of the present application. The AA cross-sectional structure diagram of the loudspeaker 100 of the embodiment of the present application is shown. The speaker 100 shown in the figure includes: a basin frame 1 and a magnetic circuit system 2 and a vibration system 3 arranged in the basin frame 1. The basin frame 1 is used to fix the magnetic circuit system 2 and the vibration system 3, and the magnetic circuit system 2 is used to generate a magnetic field. To drive the vibration system 3 to vibrate and emit sound.

The vibration system 3 includes a voice coil 33 provided in the magnetic gap of the magnetic circuit system 2, a skeleton 32 provided on the voice coil 33, and a main sound film 31 provided on the skeleton 32 and the basin 1. The main sound film 31 includes a folded ring portion 311 and a dome 312. The folding ring portion 311 includes a middle portion 3113, a first fixing portion 3111 extending inward from the inner periphery of the middle portion 3113, a second fixing portion 3112 extending outward from the outer periphery of the middle portion 3113, and the circumference of the dome 312 is set on the first The upper surface of the fixing portion 3111 thus forms a complete main sound film 31. The frame 32 includes a joint portion 321. The joint portion 321 has a first gluing surface B and a second gluing surface C that are opposed to each other. The first gluing surface B is connected to the lower surface of the first fixing portion 3111, and the second gluing surface C is connected to the voice coil. 33 is connected to the top, the frame 32 is connected to the main sound membrane 31 through the first glued surface B, and is connected to the voice coil 33 through the second glued surface C. The lower surface of the second fixing portion 3112 is connected with the top edge of the basin frame 1, so that the main sound film 31 is provided on the frame 32 and the basin frame 1.

In an alternative embodiment, please refer to FIG. 1, FIG. 2 and FIG. 5. The joint portion 321 of the skeleton 32 is continuously bent by a matrix to form a stacked structure. The joint portion 321 includes a first glue connection layer 3211, a connection layer 3213, and a second glue connection layer 3212 stacked from top to bottom. The first glue connection The layers 3211, the connecting layer 3213, and the second glue connecting layer 3212 are all arranged horizontally, and the joint portion 321 further includes a first bending portion 3214 connecting the first glue connecting layer 3211 and the connecting layer 3213, and connecting the connecting layer 3213 and the second glue The second bending portion 3215, the first bending portion 3214 and the second bending portion 3215 of the connecting layer 3212 are separately provided at both ends of the connecting layer 3213, so that the stacked cross section of the connecting portion 321 is S-shaped. The first glue surface B of the joint portion 321 is arranged on the first glue connection layer 3211 and connected to the lower surface of the first fixing portion 3311, and the second glue surface C is arranged on the second glue connection layer 3212 and is connected to the voice coil 33 The tops are connected, and the first gluing surface B and the second gluing surface C are both horizontal and opposite. The first gluing surface B is on the second glue connecting layer 3212 along the stacking direction of the joint 321 (as shown in the direction of the line D) The projection of is completely coincident with the second glued surface C. In an alternative embodiment, the first gluing surface is along the stacking direction of the joint portion (the projection on the second glue connection layer at least partially overlaps the second gluing surface.

In an alternative embodiment, please refer to 1 and Figure 2. The joint portion 321 is a joint frame body ringed on the top of the voice coil 33. The joint frame body can be set to have the same cross-sectional shape as the top of the voice coil 33 and ring around the top of the voice coil 33. Here it is a rectangular configuration, or it can be Set to other shapes.

In an alternative embodiment, please refer to FIG. 1, FIG. 2 and FIG. 5. The frame 32 also includes a bracket part 322 arranged on the joint frame. The bracket part 322 includes a plurality of brackets spaced apart from the joint frame. The brackets here are arranged at the positions corresponding to the four corners of the voice coil 33. The outer side walls of the ring 33 abut against each other, and the bracket portion 322 encloses a hollow cavity for accommodating the voice coil 33.

In the speaker 100 of the embodiment of the present application, a skeleton 32 is arranged between the main sound film 31 and the voice coil 33. The skeleton 32 includes a first glue connection layer 3211, a connection layer 3213, and a second glue connection layer 3212 that are stacked in sequence. The first glue surface B on the glue connection layer 3211 is connected to the main sound film 31, and the second glue surface C on the second glue connection layer 3212 is connected to the top of the voice coil 33, and is stacked along the joint 321 through the first glue surface B The projection projected on the second glue connecting layer 3211 in the direction at least partially overlaps the second glue surface C, so that the strength of the skeleton is enhanced, and it is not easily deformed when being squeezed during the assembly process, and the voice coil 33, the skeleton 32 and the main sound film 31 are maintained. The adhesion between the two is highly firm, and the stability of the acoustic performance of the loudspeaker is effectively improved during the process that the voice coil 33 drives the main sound membrane 31 to vibrate and produce sound together.

In an alternative embodiment, referring to FIG. 2, the vibration system 3 may also be provided with a circuit board 34 and an auxiliary sound film 35. There are two circuit boards 34, which are flexible circuit boards, which are respectively connected to the external circuit and the voice coil 33 through lead wires, and the auxiliary sound film 35 abuts against the lower surface of the circuit board 34. By arranging the circuit board 34 connected to the voice coil 33, if the circuit of the voice coil 33 itself is broken during the use of the speaker, it can be conducted through the circuit of the circuit board 34, so that the speaker has stronger reliability.

In an alternative embodiment, referring to FIG. 2, the magnetic circuit system 2 includes a main magnet 22 attached to the voice coil 33 and a main pole core 21 attached to the main magnet 22. Among them, the main pole core 21 is used for the main magnetic steel 22 to conduct magnetism to reduce the outflow of magnetic lines of force. The main magnet 22 is a permanent magnet, which is used to provide a uniform magnetic field. The voice coil 20 is arranged around the main magnet 22 so that the magnetic field strength at each position on the voice coil 33 is basically the same. Under the action of the main magnet 22 , The voice coil 33 passing through the alternating current vibrates under the action of a uniform magnetic field, and then drives the skeleton 32 connected with the voice coil 33 and the main sound film 31 to vibrate together, and finally converts electrical energy into sound energy. The magnetic circuit system 2 can also be provided with components such as a secondary magnetic steel 23 and a magnetic yoke 24. The auxiliary magnet 23 includes two opposite first auxiliary magnets 231 and two opposite second auxiliary magnets 232. The two first auxiliary magnets 231 and the two second auxiliary magnets 232 are exactly the same as the main The magnetic steel 22 is enclosed in the middle, and the auxiliary magnetic steel 23 is provided to adjust the magnetic field distribution of the speaker, so that the magnetic field strength at each position on the voice coil 33 is relatively consistent, so as to improve the sound quality of the speaker. In addition, the first sub-magnet 231 and the second sub-magnet 232 can be attached to the basin frame 1. The yoke 24 is arranged at the bottom of the main magnet 22 and the auxiliary magnet 23 to accommodate and fix the positions of the main magnet 22 and the auxiliary magnet 23.

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. range.

Claims

A framework for connecting a voice coil and a main sound film, characterized in that the framework includes a joint part provided between the voice coil and the main sound film, and the joint part is formed by continuously bending a base body to form a stack Type structure, the joint includes a first glue connection layer, a connection layer and a second glue connection layer stacked in sequence, and the first glue connection layer is provided with a first glue surface bonded to the main sound film. The second glue connection layer is provided with a second glue surface that is bonded to the voice coil, and the projection of the first glue surface on the second glue connection layer along the stacking direction of the joint is consistent with the second glue connection layer. The glued surfaces overlap at least partially.
The skeleton according to claim 1, wherein the joint part further comprises a first bending part connecting the first glue connecting layer and the connecting layer, and connecting the connecting layer and the second glue The second bending portion of the connecting layer, the first bending portion and the second bending portion are provided at both ends of the connecting layer.
The skeleton according to claim 1 or 2, wherein the joint portion forms a continuous joint frame body.
3. The skeleton according to claim 3, wherein the skeleton further comprises a bracket part provided on the joint frame, and the bracket part encloses a hollow cavity for accommodating the voice coil.
The skeleton according to claim 4, wherein the bracket portion includes a plurality of brackets spaced apart from the joint frame.
A loudspeaker, characterized in that the loudspeaker comprises a basin frame and a magnetic circuit system and a vibration system fixed in the basin frame, the magnetic circuit system generates a magnetic field to drive the vibration system to emit sound; the vibration system It comprises a main sound film, a voice coil arranged under the main sound film to drive the main sound film to vibrate, and the skeleton according to any one of claims 1 to 5 arranged between the main sound film and the voice coil.
The speaker according to claim 6, wherein the main sound film includes a folded ring portion and a dome, the folded ring portion includes a middle portion, a first fixing portion extending inward from the inner periphery of the middle portion, and A second fixing portion extending outward from the outer periphery of the middle portion; the dome top portion is provided on the upper surface of the first fixing portion, and the lower surface of the first fixing portion is provided on the first fixing portion of the frame. On the glued surface, the lower surface of the second fixing part is arranged on the top edge of the basin frame.
The speaker according to claim 6 or 7, wherein the magnetic circuit system includes a magnetic yoke, a main magnetic steel arranged on the magnetic yoke, a main pole core attached to the main magnetic steel, and Auxiliary magnets surrounding the main magnet;

The voice coil ring is arranged in the magnetic gap between the main magnet and the auxiliary magnet.
The speaker according to claim 6 or 7, wherein the vibration system further comprises a circuit board abutting the bottom end of the basin frame and the bottom end of the bracket part of the frame, and one end of the circuit board It is connected to the external circuit, and the other end is connected to the voice coil.
The speaker according to claim 9, wherein the vibration system further comprises an auxiliary sound film abutting on the lower surface of the circuit board.