CN220985842U

CN220985842U - Loudspeaker

Info

Publication number: CN220985842U
Application number: CN202322615005.2U
Authority: CN
Inventors: 李科; 张峰; 印兆宇; 丁达翔
Original assignee: AAC Microtech Changzhou Co Ltd
Current assignee: AAC Microtech Changzhou Co Ltd
Priority date: 2023-09-26
Filing date: 2023-09-26
Publication date: 2024-05-17
Anticipated expiration: 2033-09-26

Abstract

The utility model provides a loudspeaker, which comprises a basin frame, a vibration system, a magnetic circuit system and a flexible circuit board embedded from the bottom end of the basin frame, wherein the vibration system and the magnetic circuit system are respectively fixed at the two ends of the basin frame and jointly enclose a sounding cavity; the magnetic circuit system comprises a lower clamping plate and main magnetic steel; the lower clamping plate comprises a lower clamping plate body, two rectangular through holes and two first flanging, and the shape and the size of each first flanging are matched with those of the corresponding rectangular through holes; the two first flanges are respectively spaced from the main magnetic steel and jointly form a magnetic gap; the part of the lower clamping plate body, which is positioned at one side of the rectangular through hole far away from the main magnetic steel, is opposite to the basin frame, is fixed on the basin frame and is abutted to the flexible circuit board, and the rectangular through hole is communicated with the sounding cavity and the outside; the loudspeaker also comprises two ventilation isolating pieces which are fixed on the lower clamping plate body in a covering way and respectively cover the two rectangular through holes. Compared with the related art, the loudspeaker provided by the utility model has the advantages that the FPC is convenient to wire, the cost is saved, and the acoustic performance is good.

Description

Loudspeaker

[ Field of technology ]

The utility model relates to the field of electroacoustic conversion, in particular to a loudspeaker applied to an electronic sound box product.

[ Background Art ]

With the advent of the mobile internet age, the number of intelligent mobile devices has increased. Among the many mobile devices, the mobile phone is certainly the most common and portable mobile terminal device. At present, functions of a mobile phone are extremely diverse, and a high-quality music function and a vibration function, and thus, a speaker for playing sound is largely applied to the current smart mobile devices.

The loudspeaker of the related art comprises a basin frame, and a vibration system and a magnetic circuit system which are respectively fixed on the basin frame; the magnetic circuit system comprises a lower clamping plate, main magnetic steel and a pole core, wherein the main magnetic steel and the pole core are fixed on the lower clamping plate, the lower clamping plate is formed by tearing and bending from the edge of the appearance and then forming a vertical flanging, and the flanging and the main magnetic steel and the pole core form a magnetic gap at intervals.

However, the speaker of the related art fixes the FPC between the basin frame and the lower clamping plate due to the reasons such as the wiring of the FPC, and the bigger hole is inevitably formed after the flanging of the lower clamping plate and the dust cover cannot be attached, so that the rear cavity of the speaker cannot be sealed to prevent sundries and cannot be used in the rear cavity open environment, and meanwhile, the speaker leakage can only be changed by changing the shapes of the basin frame and the lower clamping plate, the part is time and labor-consuming to change the die, and the cost is too high.

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

[ utility model ]

The utility model aims to provide a loudspeaker with good leakage effect, low cost and excellent acoustic performance.

In order to achieve the above purpose, the utility model provides a loudspeaker, which comprises a basin frame, a vibration system, a magnetic circuit system with a magnetic gap and driving the vibration system to vibrate and sound, and a flexible circuit board embedded by the bottom end of the basin frame, wherein the vibration system and the magnetic circuit system are respectively fixed at two ends of the basin frame and jointly enclose a sound cavity;

the vibration system comprises a vibrating diaphragm fixed on the basin frame and a voice coil for driving the vibrating diaphragm to vibrate and sound, and the voice coil is inserted into the magnetic gap;

The magnetic circuit system comprises a lower clamping plate and main magnetic steel which is overlapped and fixed on the lower clamping plate;

The lower clamping plate comprises a lower clamping plate body, two rectangular through holes penetrating the lower clamping plate body and respectively positioned at two opposite sides of the main magnetic steel, and two first flanging which are formed at one side of the two rectangular through holes close to the main magnetic steel and extend towards the position close to the vibrating diaphragm, wherein the shape and the size of each first flanging are matched with those of the corresponding rectangular through holes; the two first flanges are respectively spaced from the main magnetic steel and jointly form the magnetic gap; the part of the lower clamping plate body, which is positioned at one side of the rectangular through hole far away from the main magnetic steel, is opposite to the basin frame, is fixed on the basin frame and is abutted to the flexible circuit board, and the rectangular through hole, the sounding cavity and the outside are communicated;

The loudspeaker further comprises two ventilation isolating pieces, wherein the two ventilation isolating pieces are fixed on the lower clamping plate body in a covering mode and respectively cover the two rectangular through holes.

Preferably, the lower clamping plate further comprises two avoidance positions and two second flanges formed by tearing and bending the other two opposite sides of the lower clamping plate body towards the direction of the vibration system, the basin stand is inserted in the avoidance positions, and the two second flanges are respectively spaced with the main magnetic steel and jointly form the magnetic gap.

Preferably, the lower clamping plate further comprises limiting parts formed by extending the other two opposite sides of the lower clamping plate body towards the direction of the vibration system;

The basin frame comprises a basin frame body, a first extension part formed by extending two opposite sides of the basin frame body to one side close to the magnetic circuit system, a second extension part formed by extending two other opposite sides of the basin frame body to one side close to the magnetic circuit system, and a limit groove formed by recessing the second extension part in a direction away from the magnetic circuit system; the first extension portion is arranged on one side, far away from the magnetic circuit system, of the rectangular through hole, the second extension portion is arranged in the avoidance position, and the limiting portion is arranged in the limiting groove.

Preferably, the lower clamping plate further comprises an inner surface close to the vibration system and an outer surface opposite to the inner surface, the lower clamping plate is provided with a groove formed by recessing from the outer surface to the inner surface, the rectangular through hole is formed in the groove, and the ventilation spacer is accommodated in the groove and covers the rectangular through hole. The lower clamping plate further comprises two bosses which are formed by extending the outer peripheral edges of the two opposite sides of the lower clamping plate body towards the vibration direction; the two bosses are respectively positioned at one side of the two rectangular through holes, which is far away from the main magnetic steel; the two bosses are fixed with the basin frame.

Preferably, the flexible circuit board comprises an elastic conductive piece fixed with the basin frame and a connecting part formed by extending one side, far away from the main magnetic steel, of the elastic conductive piece, and the elastic conductive piece is electrically connected with the voice coil.

Preferably, the vibrating diaphragm comprises a ring-shaped folded ring and a vibrating part which is ring-shaped and fixed on the inner periphery of the folded ring, the outer periphery of the folded ring is fixed on the basin frame, and the voice coil is fixed on one side of the vibrating part, which is close to the magnetic circuit system.

Preferably, the vibration system further comprises an auxiliary dome fixed on one side of the vibration part close to the magnetic circuit system, and the voice coil is fixed on one side of the auxiliary dome close to the magnetic circuit system.

Preferably, the magnetic circuit system further comprises a pole core which is overlapped and fixed on the main magnetic steel.

Preferably, the speaker further comprises a cover plate, a sound outlet and a dust cover, wherein the cover plate is fixed on the basin frame, the sound outlet penetrates through the cover plate, and the dust cover is fixed on the cover plate and covers the sound outlet.

Compared with the related art, the loudspeaker comprises a basin frame, a vibration system, a magnetic circuit system with a magnetic gap and driving the vibration system to vibrate and sound, and a flexible circuit board embedded from the bottom end of the basin frame, wherein the vibration system and the magnetic circuit system are respectively fixed at the two ends of the basin frame and jointly enclose a sound cavity; the lower clamping plate of the magnetic circuit system comprises a lower clamping plate body, two rectangular through holes penetrating the lower clamping plate body and respectively positioned at two opposite sides of the main magnetic steel, and two first flanging which are formed at one side of the two rectangular through holes close to the main magnetic steel and extend towards the position close to the vibrating diaphragm, wherein the shape and the size of each first flanging are matched with those of the corresponding rectangular through holes; the two first flanges are respectively spaced from the main magnetic steel and jointly form a magnetic gap; the part of the lower clamping plate body, which is positioned at one side of the rectangular through hole far away from the main magnetic steel, is opposite to the basin frame, is fixed on the basin frame and is abutted to the flexible circuit board, and the rectangular through hole is communicated with the sounding cavity and the outside; the loudspeaker also comprises two ventilation isolating pieces which are fixed on the lower clamping plate body in a covering way and respectively cover the two rectangular through holes. The arrangement of the rectangular through holes is convenient for the FPC wiring position of the flexible circuit board to be covered on the lower clamping plate, the FPC wiring is convenient to install, and the cost is saved; simultaneously, two ventilative separators are fixed in the lower plate body and cover two rectangle through-holes, effectively change the damping of ventilative separator and accurate adjustment control, the acoustic performance of adjustment speaker of more convenient and fast like this.

[ Description of the drawings ]

For a clearer description of the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the description below are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:

Fig. 1 is a schematic perspective view of a speaker according to the present utility model;

fig. 2 is an exploded view of the speaker of the present utility model;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 1;

fig. 5 is a schematic view of the structure of a frame of the speaker of the present utility model;

fig. 6 is a schematic view of the structure of the lower clamping plate of the speaker of the present utility model;

fig. 7 is an exploded perspective view of the bottom surface of the speaker of the present utility model.

[ Detailed description ] of the invention

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-7, the present utility model provides a speaker 100, which includes a frame 1, a vibration system 2 fixed to the frame 1, a magnetic circuit system 3 having a magnetic gap 34 and driving the vibration system 2 to vibrate and sound, and a flexible circuit board 4 embedded from a bottom end of the frame 1, wherein the vibration system 2 and the magnetic circuit system 3 are respectively fixed to two ends of the frame 1 and jointly enclose a sound cavity 8.

The vibration system 2 comprises a vibrating diaphragm 21 fixed on the basin frame 1 and a voice coil 22 driving the vibrating diaphragm 21 to vibrate and sound, and the voice coil 22 is inserted into the magnetic gap 34.

The magnetic circuit system 3 comprises a lower clamping plate 31 and main magnetic steel 32 which is overlapped and fixed on the lower clamping plate 31.

In this embodiment, the magnetic circuit system 3 further includes a pole core 33 stacked and fixed on the main magnetic steel 32. The lower clamping plate 31 is used for supporting and fixing the main magnetic steel 32, and the pole core 33 is overlapped and fixed on the main magnetic steel 32 and is used for increasing the magnetic force of the main magnetic steel 32.

The lower clamping plate 31 comprises a lower clamping plate body 311, two rectangular through holes 312 penetrating the lower clamping plate body 311 and respectively positioned at two opposite sides of the main magnetic steel 32, and two first flanges 313 formed on one side of the two rectangular through holes 312 close to the main magnetic steel 32 and extending towards the position close to the vibrating diaphragm 21, wherein the shape and the size of each first flange 313 are matched with those of the corresponding rectangular through hole 312; the two first flanges 313 are respectively spaced from the main magnetic steel 32 and jointly form the magnetic gap 34; the part of the lower clamping plate body 311, which is located at one side of the rectangular through hole 312 far away from the main magnetic steel 32, is opposite to the basin frame 1 and fixed on the basin frame 1, and is abutted to the flexible circuit board 4, and the rectangular through hole 312 is communicated with the sounding cavity 8 and the outside.

More preferably, the two rectangular through holes 312 and the two first flanges 313 are formed by tearing and bending the opposite sides of the lower clamping plate body 311 in the direction of the vibration system 2. The first flange 313 is formed by bending a portion of the lower plate body 311 corresponding to the rectangular through hole 312, and the first flange 313 can just fill the rectangular through hole 312. The flexible circuit board 4 is located on the side of the rectangular through hole 312 close to the vibration system 2. The first flange 313 is formed by tearing and bending on opposite sides (short axis sides) of the lower plate body 311 so that the lower plate body 311 is bent in the direction of the vibration system 2. Of course, since the first flange 313 is formed by tearing a portion of the lower clamping plate body 311, the lower clamping plate body 311 is formed with the rectangular through hole 312, which is convenient to manufacture and saves cost. The FPC wiring position of the flexible circuit board 4 is covered to the lower clamping plate 31 through the arrangement of the rectangular through holes 312, and the FPC wiring is convenient to install.

More specifically, the portion of the lower clamping plate body 311 located at the side of the rectangular through hole 312 away from the main magnetic steel 32 is opposite to the basin frame 1 and is fixed to the basin frame 1; the part of the opening on the basin frame 1, where the FPC is arranged, is covered, so that the FPC is arranged in a yielding way, and the installation space is saved.

The speaker 100 further includes two air-permeable spacers 5 cover-fixed to the lower plate body 311 and covering two of the rectangular through holes 312. The damping of the air-permeable spacer 5 is effectively changed and the control is precisely adjusted, so that the acoustic performance of the loudspeaker 100 is conveniently and rapidly adjusted.

In this embodiment, the lower clamping plate 31 further includes two avoidance positions 315 and two second flanges 314 formed by tearing and bending the other two opposite sides of the lower clamping plate body 311 toward the direction of the vibration system 2, the basin stand 1 is inserted into the avoidance positions 315, and the two second flanges 314 are respectively spaced from the main magnetic steel 32 and jointly form the magnetic gap 34. Two second flanges 314 are formed on both sides of the long shaft of the lower clamping plate body 311, and a magnetic gap 34 is formed by spacing the two second flanges 314 and the two first flanges 313 from the main magnetic steel 32. Meanwhile, the first flange 313 and the second flange 314 can also limit the side of the main magnetic steel 32, so that the fixing effect is better. The avoidance position 315 facilitates the installation of the basin stand 1, saves the space of the whole loudspeaker 100 and saves the cost.

In this embodiment, the lower clamping plate 31 further includes a limiting portion 317 formed by extending the other opposite sides of the lower clamping plate body 311 toward the vibration system 2.

The basin stand 1 comprises a basin stand body 11, a first extension part 12 formed by extending two opposite sides of the basin stand body 11 to the side close to the magnetic circuit system 3, a second extension part 13 formed by extending two other opposite sides of the basin stand body 11 to the side close to the magnetic circuit system 3, and a limit groove 14 formed by recessing the second extension part 13 to the direction far away from the magnetic circuit system 3; the first extension portion 12 is disposed at a side of the rectangular through hole 312 away from the magnetic circuit system 3, the second extension portion 13 is disposed in the avoidance position 315, and the limit portion 317 is disposed in the limit groove 14. So that the basin stand 1 and the lower clamping plate 31 are convenient to assemble and well fixed.

In this embodiment, the lower plate 31 further includes an inner surface 31a adjacent to the vibration system 2 and an outer surface 31b opposite to the inner surface 31a, the lower plate 31 is provided with a groove 31c recessed from the outer surface 31b toward the inner surface 31a, the rectangular through hole 312 is provided in the groove 31c, and the air-permeable separator 5 is accommodated in the groove 31c and covers the rectangular through hole 312. The ventilation spacer 5 is adhered to the groove 31c, the lower surface of the ventilation spacer 5 is parallel to the outer surface 31b of the lower clamping plate 31, the ventilation spacer 5 is prevented from protruding out of the outer surface 31b of the lower clamping plate 31, and the fixing effect is good and attractive.

In this embodiment, the lower plate 31 further includes two bosses 316 formed by extending outer peripheral edges of opposite sides of the lower plate body 311 in the vibration direction; the two bosses 316 are respectively located at one side of the two rectangular through holes 312 away from the main magnetic steel 32; two of the bosses 316 are fixed to the tub frame 1. The boss 316 and the first flange 313 are matched with the first extension part 12 of the basin frame 1, so that the first extension part 12 is arranged between the boss 316 and the first flange 313, the ventilation spacer 5 is attached to the rectangular through hole 312, and the like, so that the loudspeaker 100 is sealed and used for preventing sundries, and the loudspeaker 100 can be used in an environment with a rear cavity opened.

In this embodiment, the flexible circuit board 4 includes an elastic conductive member 41 fixed to the frame 1 and a connection portion 42 formed by extending a side of the elastic conductive member 41 away from the main magnetic steel 32, and the elastic conductive member 41 is electrically connected to the voice coil 22. The connection part 42 is connected with an external power supply, and the external power is transmitted to the voice coil 22 through the elastic conductive piece 41 to supply power to the voice coil 22, so that the voice coil 22 drives the vibrating diaphragm 21 to vibrate and sound.

Preferably, the elastic conductive member 41 is made of FPC (flexible circuit board), and has good elastic properties, so as to facilitate conduction for the voice coil 22.

In this embodiment, the diaphragm 21 includes a ring-shaped ring 211 and a vibration portion 212 fixed to an inner periphery of the ring-shaped ring 211, an outer periphery of the ring-shaped ring 211 is fixed to the frame 1, and the voice coil 22 is fixed to a side of the vibration portion 212 close to the magnetic circuit 3.

In this embodiment, the vibration system 2 further includes an auxiliary dome 23 fixed to a side of the vibration portion 212 near the magnetic circuit 3, and the voice coil 22 is fixed to a side of the auxiliary dome 23 near the magnetic circuit 3. The voice coil 22 is fixed on one side of the auxiliary dome 23 near the magnetic circuit 3, and the arrangement of the auxiliary dome 23 enables the voice coil 22 to be inserted into the magnetic gap 34 more, so as to improve the vibration performance of the diaphragm 21.

In this embodiment, the speaker 100 further includes a cover plate 6 that is fixed to the basin frame 1, a sound outlet 61 that penetrates the cover plate 6, and a dust cover 7 that is fixed to the cover plate 6 and covers the sound outlet 61. The sound generated by the voice coil 22 driving the diaphragm 21 to vibrate is transmitted through the sound outlet 61, and the acoustic performance of the speaker 100 is good. The dust cover 7 can prevent dust from the diaphragm 21.

Optionally, four sound outlets 61 are uniformly formed in the cover plate 6.

More preferably, the sound outlet 61 has a rectangular structure. The rectangular structure is convenient to manufacture, and the cost is saved.

While the utility model has been described with respect to the above embodiments, it should be noted that modifications can be made by those skilled in the art without departing from the inventive concept, and these are all within the scope of the utility model.

Claims

1. The loudspeaker comprises a basin frame, a vibration system, a magnetic circuit system with a magnetic gap and driving the vibration system to vibrate and sound, and a flexible circuit board embedded from the bottom end of the basin frame, wherein the vibration system and the magnetic circuit system are respectively fixed at two ends of the basin frame and jointly enclose a sound cavity;

the magnetic circuit system comprises a lower clamping plate and main magnetic steel which is overlapped and fixed on the lower clamping plate; it is characterized in that the method comprises the steps of,

2. The loudspeaker of claim 1, wherein the lower plate further comprises two avoidance positions and two second flanges formed by tearing and bending the other two opposite sides of the lower plate body towards the direction of the vibration system, the basin stand is inserted in the avoidance positions, and the two second flanges are respectively spaced from the main magnetic steel and jointly form the magnetic gap.

3. The speaker of claim 2, wherein the lower plate further includes a stopper formed by extending the other opposite sides of the lower plate body toward the direction of the vibration system;

4. The speaker of claim 1, wherein the lower plate further comprises an inner surface adjacent to the vibration system and an outer surface disposed opposite the inner surface, the lower plate being provided with a recess formed concavely from the outer surface toward the inner surface, the rectangular through-hole being disposed in the recess, the air-permeable spacer being received in the recess and covering the rectangular through-hole.

5. The speaker of claim 1, wherein the lower plate further comprises two bosses formed by extending outer peripheral edges of opposite sides of the lower plate body in the vibration direction; the two bosses are respectively positioned at one side of the two rectangular through holes, which is far away from the main magnetic steel; the two bosses are fixed with the basin frame.

6. The loudspeaker of claim 1, wherein the flexible circuit board includes an elastic conductive member fixed to the frame and a connection portion formed by extending a side of the elastic conductive member away from the main magnetic steel, the elastic conductive member being electrically connected to the voice coil.

7. The loudspeaker of claim 1, wherein the diaphragm includes a ring-shaped folder and a vibration part which is ring-shaped and is fixed to an inner periphery of the folder, an outer periphery of the folder is fixed to the frame, and the voice coil is fixed to a side of the vibration part close to the magnetic circuit.

8. The loudspeaker of claim 7, wherein the vibration system further comprises an auxiliary dome fixed to a side of the vibration part near the magnetic circuit system, and the voice coil is fixed to a side of the auxiliary dome near the magnetic circuit system.

9. The loudspeaker of claim 1, wherein the magnetic circuit further comprises a pole piece stacked and fixed to the main magnetic steel.

10. The loudspeaker of claim 1, further comprising a cover plate secured to the frame, an acoustic port extending through the cover plate, and a dust cap secured to the cover plate and covering the acoustic port.