CN112492457B

CN112492457B - Loudspeaker

Info

Publication number: CN112492457B
Application number: CN202011567765.5A
Authority: CN
Inventors: 肖波; 章统; 孔晨亮; 令狐荣林
Original assignee: AAC Microtech Changzhou Co Ltd; Science and Education City Branch of AAC New Energy Development Changzhou Co Ltd
Current assignee: AAC Microtech Changzhou Co Ltd; Science and Education City Branch of AAC New Energy Development Changzhou Co Ltd
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2022-04-26
Anticipated expiration: 2040-12-25
Also published as: CN112492457A

Abstract

The invention provides a loudspeaker, which comprises a basin frame, a vibration system fixed on the basin frame and a magnetic circuit system with a magnetic gap, wherein the magnetic circuit system comprises a magnetic yoke and a main magnetic circuit assembly fixed on the magnetic yoke; a boss is arranged at one end of the main pole core close to the middle membrane, the boss is provided with a second connecting surface facing the second side of the middle membrane, and the second side of the middle membrane is fixed on the second connecting surface; because the skeleton passes through the mesolamella and connects in main pole core, consequently the mesolamella can carry out the restriction to the swing of skeleton and voice coil loudspeaker voice coil, has effectively solved the problem that present speaker vibration system swayd.

Description

Loudspeaker

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of electronic elements, in particular to a loudspeaker.

[ background of the invention ]

The speaker is a transducer for converting an electrical signal into an acoustic signal, and is widely applied to portable electronic devices such as mobile phones, notebook computers, portable music players and the like, and along with the rapid development of the portable electronic devices, people have higher and higher requirements on the functionality of the portable electronic devices, and particularly, the speaker applied to the mobile phones and the speakers applied to the electronic devices also need corresponding development.

The current speaker generally includes the basin frame and accepts vibrating diaphragm, voice coil loudspeaker voice coil and the magnetic element in the basin frame, and the voice coil loudspeaker voice coil drives the vibrating diaphragm vibration under magnetic element's drive, and to some speakers, its vibrating diaphragm vibration range of self is big, and vibrating diaphragm and voice coil loudspeaker voice coil can appear rocking phenomenon in the normal direction of voice coil loudspeaker voice coil direction of motion, have influenced the vibration system's that vibrating diaphragm and voice coil loudspeaker voice coil constitute motion stability, and then influence the tone quality of speaker.

Therefore, it is necessary to provide a new speaker to solve the above problems.

[ summary of the invention ]

The invention aims to provide a loudspeaker with a vibration system not easy to sway.

The technical scheme of the invention is as follows:

in order to achieve the above object, the present invention provides

A loudspeaker comprises a basin frame with an accommodating space, a vibration system accommodated in the accommodating space and a magnetic circuit system with a magnetic gap, wherein the vibration system comprises a vibrating diaphragm fixed on the basin frame, a framework fixed on the vibrating diaphragm and facing one side of the magnetic circuit system, and a voice coil inserted in the magnetic gap through the framework, the framework is annular, the vibrating diaphragm comprises a middle membrane positioned at a middle position and an outer sound membrane positioned at a spacing ring around the middle membrane, the edge of the outer sound membrane far away from the middle membrane is fixed on the basin frame, the framework is connected with the outer sound membrane and the middle membrane, the magnetic circuit system comprises a magnetic yoke and a main magnetic circuit component fixed on the magnetic yoke, the main magnetic circuit component comprises a main magnetic steel fixed on one side of the vibrating diaphragm and a main pole core fixed on one side of the vibrating diaphragm, the middle membrane comprises a first side connected to the framework and a second side connected to the main pole core; the main pole core is close to the one end of mesolamella is equipped with the boss, the boss has the orientation the second of the second side setting of mesolamella is connected the face, the second side of mesolamella is fixed in the second is connected the face.

As an improvement mode, the inner edge of the framework is provided with a plurality of grooves with openings facing the middle part of the framework, a connecting block is arranged on the first side of the middle membrane, the shape of the connecting block is matched with that of the groove, and the connecting block is embedded in the groove.

As a refinement, the framework has an outer surface disposed away from the magnetic circuit system, and the first side of the middle membrane is provided with an extension portion extending to the outside thereof, and the extension portion is fixed to the outer surface.

As a refinement, a connecting member is further included, the connecting member being located between the middle membrane and the main pole core for connecting the middle membrane and the main pole core.

As a refinement, the connecting part has a plate-like structure.

As an improvement, the sound-absorbing structure further comprises an annular dome, wherein the dome is fixed on the outer surface and is positioned between the outer sound film and the middle film.

As an improved mode, the inner edge of the framework is provided with a flanging which is bent towards the magnetic circuit system and extends, the flanging is provided with the groove, and the voice coil is fixed on the flanging; the main magnetic circuit component, the middle membrane and the voice coil are enclosed to form a rear cavity, the magnetic circuit system, the basin frame, the outer voice membrane, the framework and the voice coil are enclosed to form a front cavity, and the flanging is provided with a vent groove for communicating the front cavity with the rear cavity.

As an improvement, the magnetic circuit system further includes a secondary magnetic circuit component spaced apart from the primary magnetic circuit component to form a magnetic gap, the secondary magnetic circuit component includes a secondary pole core disposed around the primary pole core, and the magnetic gap is disposed between the primary pole core and the secondary pole core.

As a modification, the second side of the middle film has a first connection surface disposed toward the main pole core, and the front surface of the connection member is attached to the first connection surface, and the back surface of the connection member is attached to the second connection surface.

As a refinement, the first side of the middle membrane is integrally formed with the inner edge of the armature.

The invention has the beneficial effects that:

the outer sound membrane is connected basin frame and skeleton, and the first side of mesolamella is fixed in the skeleton, and the second side of mesolamella is fixed in the boss on the main pole piece, and the voice coil loudspeaker voice coil drives the skeleton motion under the magnetic field effect that magnetic circuit produced, because the boss in main pole piece is connected in the mesolamella through the mesolamella to the skeleton, consequently the mesolamella can restrict the swing of skeleton and voice coil loudspeaker voice coil, has effectively solved the problem that present speaker vibration system swayd.

[ description of the drawings ]

Fig. 1 is a schematic view of the overall structure of an inventive speaker;

FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 2 at B;

FIG. 4 is a schematic perspective exploded view of the inventive speaker;

FIG. 5 is a front exploded view of the inventive speaker;

FIG. 6 is a schematic cross-sectional view of the center diaphragm, connecting members and frame of the inventive loudspeaker;

in the figure:

100. a speaker; 10. a basin stand; 11. an accommodating space; 20. a magnetic circuit system; 21. a magnetic yoke; 22. a main magnetic path component; 221. a second connection face; 222. a main pole core; 2221. a boss; 223. main magnetic steel; 23. a secondary magnetic circuit assembly; 231. a secondary pole core; 232. a secondary magnetic steel; 24. a magnetic gap; 30. a vibration system; 31. a framework; 311. a groove; 312. flanging; 3121. a vent channel; 313. an outer surface; 32. a voice coil; 33. an external sound membrane; 331. a first movable portion; 332. a first hinge part; 333. a first fixed part; 34. a middle membrane; 341. a second movable portion; 3411. connecting blocks; 3412. an extension portion; 342. a second flange part; 343. a second fixed part; 3431. a first connection face; 40. a connecting member; 50. a front cavity; 60. a rear cavity; 70. and (4) a ball top.

[ detailed description ] embodiments

The invention is further described with reference to the following figures and embodiments.

It should be noted that all directional indicators (such as upper, lower, left, right, front, back, inner, outer, top, bottom … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components in a specific posture (as shown in the figure), and if the specific posture is changed, the directional indicator is changed accordingly.

It will also be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Example 1

Referring to fig. 1 to 6, a speaker 100 of the present invention is schematically shown, which includes a frame 10 having an accommodating space 11, and a magnetic circuit system 20 and a vibration system 30 accommodated in the accommodating space 11.

The magnetic circuit system 20 comprises a magnetic yoke 21, a main magnetic circuit component 22 and an auxiliary magnetic circuit component 23 which is arranged at a distance from the main magnetic circuit component 22 to form a magnetic gap 24, wherein the main magnetic circuit component 22 and the auxiliary magnetic circuit component 23 are both fixed on the magnetic yoke 21, and the magnetic yoke 21 is fixedly connected to the basin stand 10.

The vibration system 30 includes a bobbin 31, a voice coil 32 and a vibrating diaphragm, the vibrating diaphragm is fixed to the frame 10, specifically, the vibrating diaphragm includes a middle membrane 34 located at a middle position and an outer membrane 33 surrounding the middle membrane 34 at intervals, the voice coil 32 is fixed to the bobbin 31, the voice coil 32 is inserted into the magnetic gap 24, and the voice coil 32 drives the bobbin 31 to move under the action of a magnetic field generated by the main magnetic circuit assembly 22 and the auxiliary magnetic circuit assembly 23. The edge of the outer sound membrane 33 away from the middle membrane 34 is fixed to the frame 10, that is, the outer sound membrane 33 connects the frame 10 and the framework 31, specifically, the outer sound membrane 33 includes a first movable portion 331, a first ring folding portion 332 and a first fixing portion 333 which are connected in sequence, wherein the first ring folding portion 332 is made of a flexible material, such as rubber. The first fixing part 333 is fixed to the frame 10, and the first movable part 331 is fixed to the frame 31.

As shown in fig. 2, a first side of the middle membrane 34 is fixed to the frame 31, and a second side of the middle membrane 34 is fixed to an end of the main magnetic circuit assembly 22 close to the middle membrane 34. Specifically, the middle membrane 34 includes a second movable portion 341, a second collar portion 342 and a second fixing portion 343, which are connected in sequence from the first side to the second side, wherein the second collar portion 342 is made of a flexible material, such as rubber. The second movable portion 341 is fixed to the frame 31, and the second fixed portion 343 is fixed to the main magnetic path unit 22.

The voice coil 32 drives the framework 31 to move under the action of the magnetic field generated by the main magnetic circuit component 22 and the auxiliary magnetic circuit component 23, and drives the air to vibrate, the middle membrane 34 connecting the framework 31 and the main magnetic circuit component 22 can limit the framework 31 and the voice coil 32 to swing, so that the anti-swing capability of the loudspeaker 100 is improved, and the sound quality of the loudspeaker 100 is prevented from being influenced. At the same time, limiting the rocking of the armature 31 and voice coil 32 also reduces the air flow to the cavity in the speaker 100, improving aerodynamic noise.

As shown in fig. 2 and 3, the speaker 100 further includes a connecting part 40, the connecting part 40 is located between the middle membrane 34 and the main magnetic circuit assembly 22 for connecting the middle membrane 34 and the main magnetic circuit assembly 22, the connecting part 40 may be integrally injection-molded with the second fixing part 343, and the connecting part 40 may also be adhered to the second fixing part 343 by an adhesive. Further, the second side of the middle membrane 34 (i.e. the second fixing portion 343) has a first connection surface 3431 disposed toward the main magnetic circuit assembly 22, the main magnetic circuit assembly 22 has a second connection surface 221 disposed toward the second side of the middle membrane 34, the front surface of the connecting part 40 is attached to the first connection surface 3431, the back surface of the connecting part 40 is attached to the second connection surface 221, i.e. the connecting part 40 is in surface contact with the second fixing portion 343, and the connecting part 40 is in surface contact with the main magnetic circuit assembly 22, so that the connecting part 40 can be adhered to the main magnetic circuit assembly 22 by an adhesive. Of course, the connection component 40 is used to connect the second fixing portion 343 with the main magnetic circuit assembly 22, and also used to transfer heat dissipated from the main magnetic circuit assembly 22 to the outside through the second fixing portion 343, so as to help the main magnetic circuit assembly 22 dissipate heat.

As shown in fig. 2 and 4, the frame 31 is annular and disposed around the middle diaphragm 34, and the outer sound diaphragm 33 is also annular, and the outer sound diaphragm 33 is disposed around the frame 31. The inner edge of the frame 31 is provided with a plurality of grooves 311 opening to the middle of the frame 31, the first side (i.e. the second movable part 341) of the middle membrane 34 is provided with connecting blocks 3411, the shape of the connecting blocks 3411 is matched with the shape of the grooves 311, the connecting blocks 3411 are embedded in the grooves 311, and the connecting blocks 3411 and the grooves 311 are used for increasing the connecting area of the frame 31 and the middle membrane 34 and ensuring the connection firmness of the frame 31 and the middle membrane 34. Preferably, the first side (i.e., the second movable portion 341) of the middle membrane 34 is integrally formed with the inner edge of the bobbin 31. Specifically, the inner edge of the bobbin 31 is provided with a flange 312 bent and extended toward the magnetic circuit system 20, the flange 312 is provided with a groove 311, and the voice coil 32 is fixed to the flange 312. The main magnetic circuit component 22, the middle membrane 34 and the voice coil 32 enclose a rear cavity 60, the secondary magnetic circuit component 23, the basin frame 10, the outer sound membrane 33, the framework 31 and the voice coil 32 enclose a front cavity 50, the flange 312 is provided with vent grooves 3121 for communicating the front cavity 50 with the rear cavity 60, and the vent grooves 3121 and the grooves 311 are arranged at intervals.

As shown in fig. 5 and 6, the frame 31 has an outer surface 313 facing away from the magnetic circuit system 20, the first side (i.e., the second movable portion 341) of the middle membrane 34 is provided with an extension portion 3412 extending to the outside thereof, the extension portion 3412 is fixed to the outer surface 313, and the extension portion 3412 is used to increase the connection area between the middle membrane 34 and the frame 31, so as to improve the connection firmness of the two. Further, the speaker 100 further includes a dome 70 having a ring shape, the dome 70 is fixed to the outer surface 313, and the dome 70 is located between the outer sound film 33 and the middle film 34.

The main magnetic path assembly 22 includes a main pole piece 222 and a main magnetic steel 223, which are stacked, wherein the back surface of the main magnetic steel 223 is fixed to the yoke 21, the main pole piece 222 is fixed to the front surface of the main magnetic steel 223, the voice coil 32 is disposed around the main pole piece 222 and the main magnetic steel 223, and the second side (i.e., the second fixing portion 343) of the middle membrane 34 is fixed to one end of the main pole piece 222 close to the middle membrane 34. The secondary magnetic circuit assembly 23 further includes a secondary pole core 231 disposed around the primary pole core 222 and a secondary magnetic steel 232 disposed around the primary magnetic steel 223, and of course, the secondary pole core 231 and the secondary magnetic steel 232 are stacked, the back surface of the secondary magnetic steel 232 is fixed to the yoke 21, the secondary pole core 231 is fixed to the front surface of the secondary magnetic steel 232, and magnetic gaps 24 are disposed between the primary pole core 222 and the secondary pole core 231 and between the primary magnetic steel 223 and the secondary magnetic steel 232.

The end of the main pole core 222 close to the middle membrane 34 is provided with a boss 2221, the second side (i.e. the second fixing portion 343) of the middle membrane 34 is fixed to the boss 2221, and the boss 2221 is arranged to prevent the main pole core 222 from interfering with the frame 31.

Example 2

This example differs from example 1 in that: the main magnetic path assembly 22 includes a main magnetic steel 223, and the second fixing portion 343 is fixed to one end of the main magnetic steel 223 near the middle membrane 34, i.e. the main pole core 222 is omitted compared to embodiment 1. The structure also enables the framework 31 to be connected to the main magnetic circuit assembly 22 through the middle membrane 34, and the middle membrane 34 can limit the swinging of the framework 31 and the voice coil 32, thereby effectively solving the problem of swinging of the vibration system 30 of the existing loudspeaker 100.

While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the invention.

Claims

1. A loudspeaker, including the basin frame with containing space and accommodate in the vibration system in the containing space and the magnetic circuit with magnetic gap, the vibration system includes the vibrating diaphragm that is fixed in the basin frame, is fixed in the vibrating diaphragm orientation the skeleton of magnetic circuit one side, through the skeleton insert locate the voice coil loudspeaker voice coil in magnetic gap, the skeleton is the annular, its characterized in that, still include adapting unit, the vibrating diaphragm includes the well membrane that is located the intermediate position and the outer sound membrane that the interval encircles the well membrane, the outer sound membrane is kept away from the edge of well membrane is fixed in the basin frame, the skeleton is connected the outer sound membrane and well membrane, magnetic circuit includes the yoke and is fixed in the main magnetic circuit subassembly of yoke, main magnetic circuit subassembly is including being fixed in the yoke is close to the main magnet steel of vibrating diaphragm one side and being fixed in main magnet steel is close to the main pole core of vibrating diaphragm one side, the middle membrane comprises a first side connected to the framework and a second side connected to the main pole core; a boss is arranged at one end, close to the middle membrane, of the main pole core, and is provided with a second connecting surface facing to the second side of the middle membrane, and the second side of the middle membrane is fixed on the second connecting surface; the connecting part is positioned between the middle film and the main pole core and used for connecting the middle film and the main pole core and dissipating heat of the main magnetic circuit component.

2. The loudspeaker of claim 1, wherein the inner edge of the frame is provided with a plurality of grooves with openings facing the middle of the frame, the first side of the middle membrane is provided with a connecting block, the shape of the connecting block is matched with that of the grooves, and the connecting block is embedded in the grooves.

3. The loudspeaker of claim 1, wherein the frame has an outer surface disposed away from the magnetic circuit system, and the first side of the middle membrane is provided with an extension extending outward therefrom, the extension being secured to the outer surface.

4. A loudspeaker according to claim 1, wherein the connecting member is of plate-like configuration.

5. The loudspeaker of claim 3, further comprising a dome having an annular shape, said dome being secured to said outer surface, and said dome being located between said outer acoustic membrane and said middle membrane.

6. The loudspeaker of claim 2, wherein the inner edge of the frame is provided with a flange bent and extending towards the magnetic circuit system, the flange is provided with the groove, and the voice coil is fixed on the flange; the main magnetic circuit component, the middle membrane and the voice coil are enclosed to form a rear cavity, the magnetic circuit system, the basin frame, the outer voice membrane, the framework and the voice coil are enclosed to form a front cavity, and the flanging is provided with a vent groove for communicating the front cavity with the rear cavity.

7. The loudspeaker of claim 1, wherein the magnetic circuit further comprises a secondary magnetic circuit assembly spaced from the primary magnetic circuit assembly to form a magnetic gap, the secondary magnetic circuit assembly comprising a secondary pole core disposed around the primary pole core, the magnetic gap being disposed between the primary and secondary pole cores.

8. The loudspeaker of claim 1 wherein the second side of the middle membrane has a first connection face disposed toward the main pole core, the front face of the connecting member being attached to the first connection face, and the back face of the connecting member being attached to the second connection face.

9. The loudspeaker of claim 2 wherein the first side of the middle membrane is integrally formed with the inner edge of the armature.