CN214481249U

CN214481249U - Loudspeaker

Info

Publication number: CN214481249U
Application number: CN202023200326.9U
Authority: CN
Inventors: 肖波; 孔晨亮; 章统; 令狐荣林
Original assignee: AAC Acoustic Technologies Shenzhen Co Ltd; AAC Microtech Changzhou Co Ltd
Current assignee: AAC Technologies Holdings Shenzhen Co Ltd; AAC Microtech Changzhou Co Ltd
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2021-10-22
Anticipated expiration: 2030-12-25

Abstract

The utility model provides a loudspeaker, it includes the basin frame and is fixed in the magnetic circuit and the vibration system of basin frame, magnetic circuit includes the main magnetic circuit subassembly and sets up the vice magnetic circuit subassembly that forms the magnetic gap with the main magnetic circuit subassembly interval, vibration system includes the vibrating diaphragm, inserts the voice coil loudspeaker voice coil and the fixed connection voice coil loudspeaker voice coil that establishes the magnetic gap and drive the vibrating diaphragm vibration sound production and the skeleton of vibrating diaphragm, the vibrating diaphragm includes the outer sound membrane of connecting basin frame and skeleton and the well membrane of connecting skeleton and main magnetic circuit subassembly, the skeleton encircles the well membrane and sets up, the well membrane includes the first fixed part that the injection moulding is fixed in the skeleton, the second fixed part that the injection moulding is fixed in the main magnetic circuit subassembly and the first inflection ring of connecting first fixed part and second fixed part, the second fixed part is injection moulding parcel top surface and the side of main pole core; 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 utility model relates to an electronic component technical field especially relates 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.

[ Utility model ] content

An object of the utility model is to provide a difficult speaker that sways of vibration system.

The technical scheme of the utility model as follows:

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

A loudspeaker comprises a frame, a magnetic circuit system and a vibration system, wherein the magnetic circuit system and the vibration system are fixed on the frame, the magnetic circuit system comprises a main magnetic circuit component and a secondary magnetic circuit component which forms a magnetic gap with the main magnetic circuit component at an interval, the main magnetic circuit component comprises main magnetic steel and a main pole core which is overlapped on the main magnetic steel along the vibration direction of the vibration system, the vibration system comprises a vibrating diaphragm, a voice coil which is inserted in the magnetic gap and drives the vibrating diaphragm to vibrate and sound, and a framework which is fixedly connected with the voice coil and the vibrating diaphragm, the vibrating diaphragm comprises an outer sound membrane which is connected with the frame and the framework, and a middle membrane which is connected with the framework and the main magnetic circuit component, the framework is arranged around the middle membrane, the middle membrane comprises a first fixing part which is fixed on the framework through injection molding, a second fixing part which is fixed on the main magnetic circuit component through injection molding, and a first inward folding ring which is connected with the first fixing part and the second fixing part, the main pole core comprises a top surface and a side surface, the top surface is deviated from one side of the main magnetic steel, the side surface extends from the top surface to the side surface close to the main magnetic steel, and the second fixing part wraps the top surface and the side surface in an injection molding mode.

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, so that a buffer space is formed between the main pole core and the voice coil.

As an improved mode, the inner edge of the framework is provided with an inward flange which is bent towards the magnetic circuit system and extends, the inward flange is provided with a plurality of grooves, and the voice coil is fixed on the inward flange; the first fixing part is provided with a connecting block, the shape of the connecting block is matched with that of the groove, and the connecting block is embedded in the groove.

As a modification, the frame has an outer surface disposed away from the magnetic circuit system, and the first fixing portion is provided with an extension portion extending outward thereof, the extension portion being 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 improvement mode, a plurality of first vent grooves are further arranged on the inward turned edges, and the first vent grooves and the grooves are arranged at intervals.

As an improvement mode, the outer edge of the framework is provided with an outward flange which is bent towards the magnetic circuit system and extends, and the outward flange is provided with a plurality of second air grooves which penetrate through the framework in the thickness direction.

As an improved mode, the vibration system further comprises an elastic supporting piece, the elastic supporting piece comprises an elastic circuit board, and two ends of the elastic circuit board are respectively connected to the framework and the basin frame.

As an improved mode, the elastic supporting element further comprises a lower sound film arranged at an interval with the outer sound film, and the lower sound film comprises a third fixing part fixed on the framework, a fourth fixing part fixed on the basin frame and a second inward-folding ring connected with the third fixing part and the fourth fixing part.

The beneficial effects of the utility model reside in that:

the outer sound membrane is connected basin frame and skeleton, and the first fixed part of mesolamella is fixed in the skeleton, and the second fixed part of mesolamella is moulded plastics the top surface and the side of parcel owner pole core, and the voice coil loudspeaker voice coil drives the skeleton motion under the magnetic field effect that main magnetic circuit subassembly and vice magnetic circuit subassembly produced, because the skeleton passes through mesolamella and connects in main pole core, 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 the loudspeaker of the present invention;

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 speaker of the present invention;

fig. 5 is a schematic structural view of the middle membrane, the framework and the main pole core of the loudspeaker of the utility model;

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. inward flanging; 3121. a first vent channel; 313. an outer surface; 314. flanging; 3141. a second vent groove; 32. a voice coil; 33. an external sound membrane; 331. a fifth fixed part; 332. a third inner fold ring; 333. a sixth fixing section; 34. a middle membrane; 341. a first fixed part; 3411. connecting blocks; 3412. an extension portion; 342. a first inner fold ring; 343. a second fixed part; 35. an elastic support member; 351. an elastic circuit board; 352. a lower sound film; 3521. a third fixed part; 3522. a second inner fold ring; 3523. a fourth fixing part; 40. a ball top; 50. a buffer space.

[ detailed description ] embodiments

The present invention will be further described with reference to the accompanying drawings and embodiments.

It should be noted that all the directional indicators (such as upper, lower, left, right, front, back, inner, outer, top, bottom … …) in the embodiments of the present invention are only used to explain the relative position between the components in a specific posture (as shown in the drawings), 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 5, 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 includes an outer voice film 33 and a middle film 34, 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 the magnetic field generated by the main magnetic circuit assembly 22 and the auxiliary magnetic circuit assembly 23. The outer sound membrane 33 connects the frame 10 and the framework 31, and specifically, the outer sound membrane 33 includes a fifth fixing portion 331, a third inward-folding ring 332 and a sixth fixing portion 333 which are connected in sequence, wherein the third inward-folding ring 332 is made of a flexible material, such as rubber. The sixth fixing part 333 is fixed to the frame 10, and the fifth fixing part 331 is fixed to the frame 31.

As shown in fig. 2, the middle film 34 includes a first fixing portion 341 fixed to the frame 31 by injection molding, a second fixing portion 343 fixed to the main magnetic circuit assembly 22 by injection molding, and a first inward-folded ring 342 connecting the first fixing portion 341 and the second fixing portion 343. The first inward-folding ring 342 is made of a flexible material, such as rubber. As shown in fig. 2 and 4, 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, and the voice coil 32 is disposed around the main pole piece 222 and the main magnetic steel 223; 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, in addition, the projection area of the primary pole core 222 on the contact surface with the primary magnetic steel 223 is smaller than the projection area of the primary magnetic steel 223 on the contact surface, so that a buffer space 50 is formed between the primary pole core 222 and the coil 32, the primary pole core 222 includes a top surface 221 facing away from the primary magnetic steel 223 side and a side surface extending from the top surface 221 to the primary magnetic steel 223, and the second fixing portion 343 is injection-molded to wrap the top surface 221 and the side surface, so as to fixedly connect the second fixing portion 343 to the primary pole core 222. The buffer space 50 can accommodate the second fixing portion 343, so as to prevent the second fixing portion 343 from interfering with the voice coil 32, and the buffer space 50 provides a sufficient space for the voice coil 32 to dissipate heat.

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, the framework 31 drives the vibrating diaphragm (the vibrating diaphragm comprises the outer sound film 33 and the middle film 34) to vibrate, and when the vibrating diaphragm vibrates and drives air to vibrate, the middle film 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 capacity of the loudspeaker 100 is improved, and the tone quality of the loudspeaker 100 is prevented from being influenced. Meanwhile, the second fixing portion 343 of the middle membrane 34 is fixed to the main magnetic circuit assembly 22 by injection molding, i.e. the second fixing portion 343 does not vibrate with the frame 31, so the area of the component for pushing air to vibrate by the speaker 100 of the present invention is reduced, thereby reducing the air flow of the front cavity and improving the aerodynamic noise.

As shown in fig. 2 and 3, 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 bobbin 31 is provided with an inward flange 312 which is bent and extended towards the magnetic circuit system 20, the inward flange 312 is provided with a groove 311, the voice coil 32 is fixed on the inward flange 312, the first fixing portion 341 of the middle membrane 34 is provided with a connecting block 3411, the shape of the connecting block 3411 is matched with that of the groove 311, the connecting block 3411 is embedded in the groove 311, the connecting block 3411 and the groove 311 are used for increasing the connecting area of the bobbin 31 and the middle membrane 34, and the connecting firmness of the bobbin 31 and the middle membrane 34 is ensured. The inner flange 312 is further provided with a plurality of first vent grooves 3121, and the first vent grooves 3121 and the grooves 311 are alternately arranged.

The frame 31 has an outer surface 313 facing away from the magnetic circuit system 20, the first fixing portion 341 of the middle membrane 34 is provided with an extending portion 3412 extending towards the outer side thereof, the extending portion 3412 is fixed on the outer surface 313, and the extending portion 3412 is used for increasing the connection area of the middle membrane 34 and the frame 31 and improving the connection firmness of the two. Further, the speaker 100 further includes a dome 40 having a ring shape, the dome 40 is fixed to the outer surface 313, and the dome 40 is located between the outer sound film 33 and the middle film 34.

Further, the outer edge of the frame 31 is provided with a flange 314 that bends and extends toward the magnetic circuit system 20, the flange 314 is provided with a plurality of second ventilation grooves 3141 that penetrate along the thickness direction of the frame 31, and both the first ventilation groove 3121 and the second ventilation grooves 3141 are favorable for the internal air flow of the speaker 100.

In order to suppress the wobble of the voice coil 32 during vibration, the vibration system 30 further includes an elastic support 35, and the elastic support 35 includes an elastic circuit board 351 and a lower sound film 352, wherein the lower sound film 352 and the outer sound film 33 are spaced apart. Two ends of the elastic circuit board 351 are respectively connected to the framework 31 and the basin stand 10; the lower sound diaphragm 352 includes a third fixing portion 3521 fixed to the frame 31, a fourth fixing portion 3523 fixed to the frame 10, and a second folded ring 3522 connecting the third fixing portion 3521 and the fourth fixing portion 3523. The elastic circuit board 351 has elasticity, and the lower sound film 352 and the elastic circuit board 351 can jointly suppress the vibration of the bobbin 31 (and the voice coil 32) during vibration.

Example 2

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 second fixing part 343 is provided with a limiting block, the limiting block is embedded in the limiting hole to ensure the connection tightness between the second fixing part 343 and the main magnetic path component 22, and the second fixing part 343 of the middle film 34 can be integrally injection-molded with the main magnetic path component 22 to realize the structure of the embodiment.

The above embodiments of the present invention are only described, and it should be noted that, for those skilled in the art, modifications can be made without departing from the inventive concept, but these all fall into the protection scope of the present invention.

Claims

1. A loudspeaker comprises a frame, a magnetic circuit system and a vibration system, wherein the magnetic circuit system and the vibration system are fixed on the frame, the magnetic circuit system comprises a main magnetic circuit component and a secondary magnetic circuit component which is arranged at an interval with the main magnetic circuit component to form a magnetic gap, the main magnetic circuit component comprises main magnetic steel and a main pole core which is overlapped on the main magnetic steel along the vibration direction of the vibration system, the vibration system comprises a vibrating diaphragm, a voice coil which is inserted in the magnetic gap and drives the vibrating diaphragm to vibrate and sound, and a framework which is fixedly connected with the voice coil and the vibrating diaphragm, and the loudspeaker is characterized in that the vibrating diaphragm comprises an external sound film which is connected with the frame and the framework and a middle film which is connected with the framework and the main magnetic circuit component, the framework is arranged around the middle film, the middle film comprises a first fixing part which is fixed on the framework through injection molding, a second fixing part which is fixed on the main magnetic circuit component through injection molding, and a first internal folding ring which is connected with the first fixing part and the second fixing part, the main pole core comprises a top surface and a side surface, the top surface deviates from one side of the main magnetic steel, the side surface extends from the top surface to the side surface close to the main magnetic steel, and the second fixing part wraps the top surface and the side surface in an injection molding mode.

2. The speaker of claim 1, wherein the projected area of said main pole core on the contact surface with said main magnet is smaller than the projected area of said main magnet on said contact surface, so that a buffer space is formed between said main pole core and said voice coil.

3. The loudspeaker of claim 1, wherein the inner edge of the frame is provided with an inward flange bent and extending towards the magnetic circuit system, the inward flange is provided with a plurality of grooves, and the voice coil is fixed to the inward flange; the first fixing part is provided with a connecting block, the shape of the connecting block is matched with that of the groove, and the connecting block is embedded in the groove.

4. The speaker of claim 1, wherein the frame has an outer surface disposed away from the magnetic circuit system, and the first fixing portion is provided with an extension portion extending outward thereof, the extension portion being fixed to the outer surface.

5. The loudspeaker of claim 4, 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 3 wherein a plurality of first vent slots are provided in the inner flange, the first vent slots and the notches being spaced apart.

7. The loudspeaker according to claim 1, wherein the frame has a flange bent and extended toward the magnetic circuit system at an outer edge thereof, and the flange has a plurality of second ventilation grooves formed therethrough in a thickness direction of the frame.

8. The loudspeaker of claim 1, wherein the vibration system further comprises a resilient support member comprising a resilient circuit board, both ends of the resilient circuit board being connected to the frame and the frame, respectively.

9. The speaker of claim 8, wherein the elastic support member further comprises a lower diaphragm spaced apart from the outer diaphragm, the lower diaphragm comprising a third fixing portion fixed to the frame, a fourth fixing portion fixed to the frame, and a second inward-folded ring connecting the third fixing portion and the fourth fixing portion.