CN210274519U

CN210274519U - Loudspeaker for reducing distortion

Info

Publication number: CN210274519U
Application number: CN201921365758.XU
Authority: CN
Inventors: 何宛昀; 张凯评; 郭守芳; 郭彭帅
Original assignee: Dongguan Weisheng Acoustic Technology Co Ltd; Tsinghua University
Current assignee: Dongguan Weisheng Acoustic Technology Co Ltd; Tsinghua University
Priority date: 2019-08-21
Filing date: 2019-08-21
Publication date: 2020-04-07
Anticipated expiration: 2029-08-21

Abstract

The utility model discloses a loudspeaker for reducing distortion, which comprises a shell, a vibration system and a magnetic circuit system, wherein the vibration system and the magnetic circuit system are arranged in the shell; an FPC board is fixedly arranged below the framework; the FPC board comprises an outer ring, an inner ring arranged in the outer ring and an extension part connected to the outer edge of the outer ring, the outer ring is connected with the inner ring through a cantilever, the inner ring is fixedly connected with the lower end of the framework, and the extension part penetrates out of the shell; a conductive layer communicated with an external circuit is arranged in the FPC board, and the conductive layer is electrically connected with a voice coil lead of the voice coil part. The utility model discloses a lower extreme fixed connection FPC board at the skeleton can reduce the amplitude of the lateral vibration of voice coil loudspeaker voice coil subassembly when vibrating widely, has improved voice coil loudspeaker voice coil subassembly longitudinal movement's stability, has reached the effect that reduces the distortion.

Description

Loudspeaker for reducing distortion

Technical Field

The utility model relates to a speaker technical field specifically is a speaker that relates to a reduce distortion.

Background

The existing micro speaker generally includes a diaphragm, a voice coil assembly, a washer, a magnet, a yoke, a housing, etc., and the magnetic circuit portion of the speaker includes the washer, the magnet, and the yoke. In present speaker, generally set up the electric connection terminal of connecting external circuit on the shell, need wear out the shell outside with the voice coil loudspeaker voice coil lead wire of voice coil loudspeaker voice coil subassembly by the shell is inside and just can weld with electric connection terminal carrying out speaker assembled, the operation process is complicated and the operation degree of difficulty is big, inconvenient welding, not only welding quality is poor, bad such as rosin joint easily appears, still causes the broken string of voice coil loudspeaker voice coil lead wire easily simultaneously, influences the yields of speaker. Moreover, because the sound production of speaker mainly relies on voice coil loudspeaker voice coil subassembly cutting magnetic induction line vibration to drive the vibrating diaphragm vibration, but the voice coil loudspeaker voice coil subassembly is effective cutting only when longitudinal vibration, and lateral vibration can produce the noise, so avoid voice coil loudspeaker voice coil subassembly's lateral vibration as far as possible.

SUMMERY OF THE UTILITY MODEL

To the problem that prior art exists above, the utility model aims at providing a reduce speaker of distortion, its simple structure, equipment are convenient, can also reduce voice coil loudspeaker voice coil subassembly transverse vibration's range simultaneously widely, reach the effect that reduces the distortion, improve speaker acoustic quality.

In order to realize the purpose, the technical scheme of the utility model is that:

a loudspeaker for reducing distortion comprises a shell, and a vibration system and a magnetic circuit system which are arranged in the shell, wherein the vibration system comprises a vibrating diaphragm fixedly connected with the shell and a voice coil assembly for driving the vibrating diaphragm to vibrate, and the voice coil assembly comprises a framework hung at the bottom of the vibrating diaphragm and a voice coil part arranged on the framework; an FPC board is fixedly arranged below the framework; the FPC board comprises an outer ring, an inner ring arranged in the outer ring and an extension part connected to the outer edge of the outer ring, the outer ring is connected with the inner ring through a cantilever, the inner ring is fixedly connected with the lower end of the framework, and the extension part penetrates out of the shell; and a conductive layer communicated with an external circuit is arranged in the FPC board and is electrically connected with the voice coil lead of the voice coil part.

In a specific embodiment, the outer ring and the inner ring are both annular.

Further, the lower end of the framework is connected to the inner side edge of the inner ring.

As a specific example, the conductive layer is disposed on the top surface or the bottom surface of the FPC board.

As a specific example, the cantilever includes a first cantilever and a second cantilever respectively located at the left and right sides of the inner ring.

Further, the voice coil leads include a first voice coil lead and a second voice coil lead; the conducting layer comprises a first copper foil strip and a second copper foil strip; the first copper foil strip extends to the rear side of the inner ring through the extension part, the outer ring and the first cantilever respectively, and the tail end of the first copper foil strip is connected with the first voice coil lead; the second copper foil strip extends to the front side of the inner ring through the extension part, the outer ring and the second cantilever respectively, and the tail end of the second copper foil strip is connected with the second voice coil lead.

Further, the first voice coil lead and the second voice coil lead are respectively arranged on the front side and the rear side of the voice coil portion.

Furthermore, bulges extending towards the outer ring are respectively arranged on the front side and the rear side of the inner ring, and the tail ends of the first copper foil strip and the second copper foil strip are respectively arranged in the two bulges.

As a specific embodiment, the outer ring is fixed in the magnetic circuit system.

Further, the magnetic circuit system comprises a magnetic yoke, a magnet arranged on the magnetic yoke and washers arranged on the magnet; the magnetic yoke comprises a base, a ring wall and a boss; the annular wall is arranged at the peripheral edge of the top surface of the substrate and positioned at the outer side of the framework; the boss is arranged in the middle of the top surface of the substrate and positioned on the inner side of the framework; the magnets comprise a first magnet arranged on the annular wall and a second magnet arranged on the boss; the washer comprises a first washer arranged on the first magnet and a second washer arranged on the second magnet; the annular wall comprises an upper annular wall and a lower annular wall; magnetic gaps are formed between the first magnet and the second magnet and between the first washer and the second washer, the voice coil portion extends into the magnetic gaps, the outer ring is fixed between the upper ring wall and the lower ring wall, and the inner ring is located above the substrate and located between the ring wall and the boss.

The utility model has the advantages that:

the structure is simple and reasonable, and the assembly is convenient.

And (II) the lower end of the framework is fixedly connected with the FPC board, so that the amplitude of transverse vibration of the voice coil assembly during vibration can be greatly reduced, and the stability of longitudinal movement of the voice coil assembly is improved, thereby achieving the effects of reducing distortion and improving the acoustic quality of the loudspeaker.

And (III) the voice coil part is communicated with an external circuit by arranging the conducting layer on the FPC board, and the inner ring of the FPC board is fixedly connected with the framework, so that the framework synchronously vibrates when vibrating, and the lead of the voice coil is not easy to break and drop from the FPC board.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is an exploded view of the present invention;

fig. 3 is a longitudinal sectional view of the present invention;

fig. 4 is a plan view of the FPC board of the present invention;

fig. 5 is a bottom view of the FPC board of the present invention.

Reference numerals:

1. a housing; 21. vibrating diaphragm; 22. a voice coil assembly; 221. a framework; 222. a voice coil section; 31. a magnetic yoke; 311. a substrate; 312. an annular wall; 3121. an upper annular wall; 3122. a lower annular wall; 313. a boss; 32. a magnet; 321. a first magnet; 322. a second magnet; 33. washer; 331. a first washer; 332. a second washer; 4. an FPC board; 41. an outer ring; 42. an inner ring; 421. a protrusion; 43. an extension portion; 44. a cantilever; 441. a first cantilever; 442. a second cantilever; 45. a conductive layer; 451. a first copper foil strip; 452. a second copper foil strip.

Detailed Description

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated.

The invention will be further elucidated with reference to the drawings and the embodiments, which are exemplary only and do not limit the scope of the invention.

As shown in fig. 1 to 5, a speaker for reducing distortion includes a housing 1, and a vibration system and a magnetic circuit system provided in the housing 1; the vibration system comprises a vibrating diaphragm 21 fixedly connected with the shell 1 and a voice coil assembly 22 for driving the vibrating diaphragm 21 to vibrate, wherein the voice coil assembly 22 comprises a framework 221 hung at the bottom of the vibrating diaphragm 21 and a voice coil part 222 arranged on the framework 221; an FPC board 4 is fixedly arranged below the framework 221, the FPC board 4 comprises an outer ring 41, an inner ring 42 arranged in the outer ring 41 and an extension part 43 connected to the outer edge of the outer ring 41, the outer ring 41 and the inner ring 42 are connected through a cantilever 44, the inner ring 42 is fixedly connected with the lower end of the framework 221, and the extension part 43 penetrates out of the shell 1; preferably, the outer race 41 and the inner race 42 are both annular. Preferably, the lower end of the framework 221 is connected to the inner side edge of the inner ring 41; preferably, the framework 221 can be connected with the inner ring 41 in a welding manner; a conductive layer 45 communicated with an external circuit is also arranged in the FPC board, and the conductive layer 45 is electrically connected with a voice coil lead of the voice coil part 222; preferably, the conductive layer 45 is selectively provided on the top surface or the bottom surface of the FPC board 4, and in the present embodiment, the conductive layer 45 is provided on the bottom surface of the FPC board 4. The magnetic circuit system is used for providing a magnetic field for the voice coil assembly 22, and the FPC board 4 is connected to the lower end of the framework 221, so that when the voice coil assembly 22 vibrates after being electrified, the FPC board 4 can play a role of centering a support piece, the amplitude of transverse vibration of the voice coil assembly 22 is greatly reduced, the stability of longitudinal vibration of the voice coil assembly 22 is improved, and the effects of reducing distortion and improving the acoustic quality of a loudspeaker are achieved.

Here, suspension arm 44 includes first and

second suspension arms

441 and 442 located on the left and right sides of inner race 42, respectively.

As shown in fig. 3-5, the voice coil leads include a first voice coil lead (not shown) and a second voice coil lead (not shown); the conductive layer 45 includes a first strip of copper foil 451 and a second strip of copper foil 452; the first copper foil strip 451 extends to the rear side of the inner ring 41 through the extension part 43, the outer ring 41 and the first cantilever 441 respectively, and the tail end of the first copper foil strip 451 is connected with a first voice coil lead; the second copper foil strip 452 extends to the front side of the inner ring 41 through the extension part 43, the outer ring 41 and the second cantilever 442 respectively, and the tail end of the second copper foil strip 452 is connected with a second voice coil lead; in order to balance the vibration of the diaphragm 21, the first and second voice coil leads of the voice coil portion 222 are symmetrically disposed on both front and rear sides of the voice coil portion 222. Preferably, the first voice coil lead and the second voice coil lead can be connected by welding with a copper foil strip. Specifically, a protrusion 421 extending toward the outer ring 41 is respectively provided on the front side and the rear side of the inner ring 41, and the end of the first copper foil strip 451 and the end of the second copper foil strip 452 are respectively provided in the two protrusions 421. Through the above arrangement, the voice coil part 222 can be smoothly electrified with an external circuit, the structure is simpler and more convenient to assemble, the welding areas of the first voice coil lead and the second voice coil lead and the first copper foil strip 451 and the second copper foil strip 452 can be increased by the two protrusions 421, and the connection is more stable. Moreover, the two connection points between the first voice coil lead and the conductive layer 45 and the second voice coil lead and the conductive layer are respectively arranged on the front side and the rear side of the inner ring 42, and the first cantilever 441 and the second cantilever 442 are respectively arranged on the left side and the right side of the inner ring 42, so that the stress of the framework 221 during vibration is more uniform, the vibration of the diaphragm 21 is more balanced, and the effect of improving the acoustic quality of the loudspeaker is achieved.

As shown in fig. 2 and 3, the magnetic circuit system includes a yoke 31, a magnet 32 provided on the yoke 31, and a washer 33 provided on the magnet 32; the yoke 31 includes a base 311, a ring wall 312, and a boss 313; the annular wall 312 is arranged at the peripheral edge of the top surface of the substrate 311 and positioned at the inner side of the framework 221; the boss 313 is disposed in the middle of the top surface of the substrate 311 and is located inside the framework 221, it should be noted that neither the annular wall 312 nor the boss 313 is in contact with the framework 221; the magnets 32 include a first magnet 321 disposed on the circumferential wall 312 and a second magnet 322 disposed on the boss 313; the washer 33 comprises a first washer 331 arranged on the first magnet 321 and a second washer 332 arranged on the second magnet 322; the annular wall 312 includes an upper annular wall 3121 and a lower annular wall 3122; magnetic gaps are formed between the first magnet 321 and the second magnet 322 and between the first washer 331 and the second washer 332, the voice coil portion 22 extends into the magnetic gaps, the outer ring 41 is fixed between the upper annular wall 3121 and the lower annular wall 3122, and the inner ring 42 is located above the substrate 311 and between the annular wall 312 and the boss 313. Specifically, the centers of the boss 313, the second magnet 322 and the second washer 332 are all on the same straight line. Specifically, the yoke 31 and the magnet 32 may be connected by bonding, and the magnet 32 and the washer 33 may be connected by bonding. Preferably, the base 311, the boss 313, the second magnet 322 and the second washer 332 are all hollow structures and the hollow structures are communicated with each other, so as to ensure the circulation of air.

The first magnet 321 and the first washer 331 are both annular, so that the first magnet 321 and the first washer 331 are convenient to mount, and the magnetic flux and uniformity of a magnetic field can be ensured.

The first washer 331 and the second washer 332 are made of the same material, which is beneficial to improving the uniformity and the symmetry in the vertical direction of the magnetic field.

The distance between the outer side surface of the first washer 331 and the inner side surface of the second washer 332 is less than the distance between the outer side surface of the first magnet 321 and the inner side surface of the second magnet 322 is less than the distance between the outer side surface of the boss 313 and the inner side surface of the annular wall 312. The arrangement is favorable for improving the uniformity and the symmetry of the magnetic field in the vertical direction.

The specific principle of the utility model is that:

after the voice coil part 222 is conducted with the external circuit through the conducting layer 45, the voice coil assembly 22 vibrates in a magnetic field through the conduction of the two voice coil lead wires, the vibrating voice coil assembly 22 drives the vibrating diaphragm 21 to vibrate, the vibrating diaphragm 21 drives the air to sound, and the FPC board 4 can greatly reduce the amplitude of the transverse vibration of the voice coil assembly 22 due to the arrangement of the FPC board 4, so that the stability of the longitudinal vibration of the voice coil assembly 22 is improved, and the effects of reducing distortion and improving the acoustic quality of a loudspeaker are achieved.

The present invention is not limited to the above embodiment, and if various modifications or variations of the present invention do not depart from the spirit and scope of the present invention, they are intended to be covered if they fall within the scope of the claims and the equivalent technology of the present invention.

Claims

1. A speaker for reducing distortion, comprising a housing, and a vibration system and a magnetic circuit system disposed in the housing, wherein the vibration system comprises a diaphragm fixedly connected to the housing and a voice coil assembly for driving the diaphragm to vibrate, the voice coil assembly comprises a frame suspended at the bottom of the diaphragm and a voice coil portion disposed on the frame, and the speaker is characterized in that:

an FPC board is fixedly arranged below the framework; the FPC board comprises an outer ring, an inner ring arranged in the outer ring and an extension part connected to the outer edge of the outer ring, the outer ring is connected with the inner ring through a cantilever, the inner ring is fixedly connected with the lower end of the framework, and the extension part penetrates out of the shell; and a conductive layer communicated with an external circuit is arranged in the FPC board and is electrically connected with the voice coil lead of the voice coil part.

2. A distortion-reducing loudspeaker as claimed in claim 1, wherein:

the outer ring and the inner ring are both annular.

3. A distortion-reducing loudspeaker as claimed in claim 2, wherein:

the lower end of the framework is connected to the inner side edge of the inner ring.

4. A distortion-reducing loudspeaker as claimed in claim 1, wherein:

the conductive layer is disposed on a top surface or a bottom surface of the FPC board.

5. A distortion-reducing loudspeaker as claimed in claim 1, wherein:

the cantilever comprises a first cantilever and a second cantilever which are respectively positioned at the left side and the right side of the inner ring.

6. A distortion-reducing loudspeaker as claimed in claim 5, wherein:

the voice coil leads comprise a first voice coil lead and a second voice coil lead; the conducting layer comprises a first copper foil strip and a second copper foil strip; the first copper foil strip extends to the rear side of the inner ring through the extension part, the outer ring and the first cantilever respectively, and the tail end of the first copper foil strip is connected with the first voice coil lead; the second copper foil strip extends to the front side of the inner ring through the extension part, the outer ring and the second cantilever respectively, and the tail end of the second copper foil strip is connected with the second voice coil lead.

7. A distortion-reducing loudspeaker as claimed in claim 6, wherein:

the first voice coil lead and the second voice coil lead are respectively arranged on the front side and the rear side of the voice coil portion.

8. A distortion-reducing loudspeaker as claimed in claim 6, wherein:

the front side and the rear side of the inner ring are respectively provided with a bulge extending towards the outer ring, and the tail end of the first copper foil strip and the tail end of the second copper foil strip are respectively arranged in the two bulges.

9. A distortion-reducing loudspeaker as claimed in claim 1, wherein:

the outer ring is fixed in the magnetic circuit system.

10. A distortion-reducing loudspeaker as claimed in claim 9, wherein:

the magnetic circuit system comprises a magnet yoke, a magnet arranged on the magnet yoke and washers arranged on the magnet; the magnetic yoke comprises a base, a ring wall and a boss; the annular wall is arranged at the peripheral edge of the top surface of the substrate and positioned at the outer side of the framework; the boss is arranged in the middle of the top surface of the substrate and positioned on the inner side of the framework; the magnets comprise a first magnet arranged on the annular wall and a second magnet arranged on the boss; the washer comprises a first washer arranged on the first magnet and a second washer arranged on the second magnet; the annular wall comprises an upper annular wall and a lower annular wall; magnetic gaps are formed between the first magnet and the second magnet and between the first washer and the second washer, the voice coil portion extends into the magnetic gaps, the outer ring is fixed between the upper ring wall and the lower ring wall, and the inner ring is located above the substrate and located between the ring wall and the boss.