CN112752206A

CN112752206A - Loudspeaker

Info

Publication number: CN112752206A
Application number: CN202011565794.8A
Authority: CN
Inventors: 肖波; 孔晨亮; 章统; 令狐荣林
Original assignee: AAC Optoelectronic Changzhou Co Ltd; Science and Education City Branch of AAC New Energy Development Changzhou Co Ltd
Current assignee: AAC Microtech Changzhou Co Ltd; AAC Optoelectronic 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: 2021-05-04

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 vibration system comprises a vibrating diaphragm, a framework and a voice coil, the framework is annular, the vibrating diaphragm also comprises a middle membrane and an outer sound 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 magnet yoke and a main magnetic circuit component, the main magnetic circuit component comprises main magnetic steel and a main pole core, the main pole core comprises a top surface and a side surface, and the middle membrane comprises a first side connected with the framework and a second side connected with the main pole core; the second side of the middle film is provided with a yielding through hole exposing the top surface of the main pole core and a limiting part extending towards the main pole core and fixed on the side surface of the main pole core; the voice coil loudspeaker voice coil drives the skeleton to move under the action of a magnetic field generated by the magnetic circuit component, and the skeleton is connected to the main magnetic circuit component through the middle membrane, so that the middle membrane can limit the swinging of the skeleton and the voice coil loudspeaker voice coil, and the problem of swinging of the existing loudspeaker vibration system is effectively solved.

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 speaker, including a frame having an accommodating space, a vibration system and a magnetic circuit system having a magnetic gap, the vibration system including a diaphragm fixed to the frame, a frame fixed to one side of the diaphragm facing the magnetic circuit system, and a voice coil inserted in the magnetic gap through the frame, the frame being annular, the diaphragm further including a middle membrane located at a middle position and an outer membrane surrounding the middle membrane at intervals, an edge of the outer membrane far from the middle membrane being fixed to the frame, the frame connecting the outer membrane and the middle membrane, the magnetic circuit system including a yoke and a main magnetic circuit component fixed to the yoke, the main magnetic circuit component including a main magnetic steel fixed to one side of the yoke near the diaphragm and a main pole core fixed to one side of the main magnetic steel near the diaphragm, the main pole core comprises a top surface deviating from one side of the main magnetic steel and a side surface extending from the top surface to the position close to the main magnetic steel, and the middle film comprises a first side connected to the framework and a second side connected to the main pole core; the second side of the middle membrane is provided with a yielding through hole penetrating through the middle membrane along the vibration direction, the top surface of the main pole core is exposed out of the yielding through hole, the middle membrane faces the edge of the yielding through hole, the edge of the yielding through hole extends towards the main pole core to form a limiting portion, and the limiting portion is fixed on the side surface of the main pole core.

As an improvement mode, the limiting part is annular and is arranged around the main pole core.

As an improvement, the second side of the middle membrane has a connection surface facing the main pole core, the connection surface is annular, and the connection surface is attached to the edge of the top surface of the main pole core.

As an improvement, the projection area of the main pole core on the contact surface of the main pole core and the main magnetic steel is smaller than the projection area of the main magnetic steel on the contact surface.

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 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 an auxiliary magnetic circuit component spaced from the main magnetic circuit component to form a magnetic gap, the auxiliary magnetic circuit component includes an auxiliary pole core surrounding the main pole core and an auxiliary magnetic steel surrounding the main magnetic steel, and the magnetic gap is provided between the main pole core and the auxiliary pole core and between the main magnetic steel and the auxiliary magnetic steel.

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 connected in main utmost point core, and the voice coil loudspeaker voice coil drives the skeleton motion under the magnetic field effect that magnetic circuit produced, because the skeleton is connected in main utmost point core through mesolamella, consequently the mesolamella can be restricted the swing of skeleton and voice coil loudspeaker voice coil, has effectively solved the problem that present speaker vibration system swayd, and simultaneously, the through-hole of stepping down that the second side of mesolamella set up can give off the heat of main utmost point core to the external world.

[ 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 structural diagram of the middle membrane, the framework and the magnetic circuit system of the inventive speaker;

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 top surface; 222. a main pole core; 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 connecting surface; 3432. a limiting part; 3433. a yielding through hole; 40. a front cavity; 50. a rear cavity; 60. 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, 3 and 6, a first side of the middle membrane 34 is fixed to the frame 31, a second side of the middle membrane 34 is provided with a position-limiting portion 3432 extending toward the main magnetic path component 22, and the position-limiting portion 3432 is fixed to a side wall of the main magnetic path component 22 close to the magnetic gap 24. 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 fixing portion 343 is provided with the above-mentioned limiting portion 3432. The limiting portion 3432 may be adhered to the side wall of the main magnetic circuit assembly 22 by glue.

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.

Further, as shown in fig. 4, the limiting portion 3432 is annular, and the limiting portion 3432 is disposed around the main magnetic circuit component 22, so that the limiting portion 3432 can surround the main magnetic circuit component 22, limit the degree of freedom of the second fixing portion 343 and the main magnetic circuit component 22 in the normal direction of the moving direction of the voice coil 32, and further limit the swing of the bobbin 31 and the voice coil 32 through the middle diaphragm 34.

The second side of the middle film 34 is provided with an abdicating through hole 3433 penetrating therethrough along the vibration direction, and the main magnetic circuit component 22 is exposed out of the abdicating through hole 3433, so that the main magnetic circuit component 22 can radiate heat to the outside through the abdicating through hole 3433, thereby improving the heat radiation performance of the loudspeaker 100.

As shown in fig. 5, the second side (i.e., the second fixing portion 343) of the middle membrane 34 has a connecting surface 3431 disposed toward the main magnetic circuit assembly 22, the connecting surface 3431 is annular, the main magnetic circuit assembly 22 has a top surface 221 disposed toward the second fixing portion 343, and the connecting surface 3431 is attached to an edge of the top surface 221. Wherein, the connecting surface 3431 and the top surface 221 can be adhered by glue.

As shown in fig. 2 to 6, 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 framework 31 is provided with a plurality of grooves 311 with openings facing the middle part of the framework 31, the first side of the middle membrane 34 is provided with connecting blocks 3411, the shapes of the connecting blocks 3411 are matched with the shapes 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 framework 31 and the middle membrane 34 and ensuring the connecting firmness of the framework 31 and the middle membrane 34. Preferably, the first side of the middle membrane 34 is injection molded integrally with the inner edge of the armature 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 50, the secondary magnetic circuit component 23, the basin frame 10, the outer voice membrane 33, the framework 31 and the voice coil 32 enclose a front cavity 40, the flange 312 is provided with vent grooves 3121 for communicating the front cavity 40 with the rear cavity 50, and the vent grooves 3121 and the grooves 311 are arranged at intervals.

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 for increasing the connection area between the middle membrane 34 and the frame 31 and improving the connection firmness of the two. Further, the speaker 100 further includes a dome 60 having a ring shape, the dome 60 is fixed to the outer surface 313, and the dome 60 is located between the outer sound film 33 and the middle film 34.

As shown in fig. 4, the main magnetic path assembly 22 includes a main pole piece 222 and a main magnetic steel 223 stacked, a back surface of the main magnetic steel 223 is fixed to the yoke 21, the main pole piece 222 is fixed to a 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, the main pole piece 222 includes a top surface 221 facing away from the main magnetic steel 223 and a side surface extending from the top surface 221 to a position close to the main magnetic steel 223, specifically, the limiting portion 3432 is fixed to the side surface of the main pole piece 222, the top surface 221 of the main pole piece 222 is exposed to the outside through the positioning through hole 3433, and the connecting surface 3431 of the middle membrane 34 is connected to the top; 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, 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, 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, and the second fixing portion 343 is fixed to the side wall of the primary pole core 222 close to the magnetic gap 24 through the above-mentioned limiting portion 3432. In addition, the projection area of the main pole core 222 on the contact surface with the main magnet 223 is smaller than that of the main magnet 223 on the contact surface, so as to avoid the interference between the main pole core 222 and the frame 31.

Example 2

This example differs from example 1 in that: the main magnetic path component 22 includes a main magnetic steel 223, and the limiting portion 3432 is fixed on the side wall of the main magnetic steel 223 close to the magnetic gap 24, i.e. the main pole core 222 is omitted compared with 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.

Example 3

This example differs from example 1 in that: the side wall of the main magnetic path component 22 close to the magnetic gap 24 is provided with a limiting hole, the limiting part 3432 is provided with a limiting block, the limiting block is embedded in the limiting hole to ensure the connection tightness between the limiting part 3432 and the main magnetic path component 22, and the limiting part 3432 of the middle membrane 34 and the main magnetic path component 22 can be integrally injection molded to realize the structure of the embodiment.

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 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 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 further comprises a middle membrane positioned in the middle position and an outer sound membrane surrounding the middle membrane at intervals, 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 main pole core comprises a top surface deviating from one side of the main magnetic steel and a side surface extending from the top surface to the position close to the main magnetic steel, and the middle film comprises a first side connected to the framework and a second side connected to the main pole core; the second side of the middle membrane is provided with a yielding through hole penetrating through the middle membrane along the vibration direction, the top surface of the main pole core is exposed out of the yielding through hole, the middle membrane faces the edge of the yielding through hole, the edge of the yielding through hole extends towards the main pole core to form a limiting portion, and the limiting portion is fixed on the side surface of the main pole core.

2. The loudspeaker of claim 1, wherein the limiting portion is annular and is disposed around the main pole core.

3. The loudspeaker of claim 1 wherein the second side of the middle membrane has a connecting surface disposed toward the main pole core, the connecting surface being annular and the connecting surface being attached to an edge of the top surface of the main pole core.

4. The loudspeaker of claim 1, wherein the projected area of said main pole core on the contact surface with said main pole steel is smaller than the projected area of said main pole steel on said contact surface.

5. 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.

6. 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.

7. The loudspeaker of claim 6, 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.

8. The loudspeaker according to claim 5, 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 to 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.

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

10. The loudspeaker of claim 6 wherein the first side of the middle membrane is integrally formed with the inner edge of the armature.