CN214901300U

CN214901300U - Micro speaker and damper for micro speaker

Info

Publication number: CN214901300U
Application number: CN202121437875.XU
Authority: CN
Inventors: 徐庆山; 徐豪键
Original assignee: Foshan Veco Electronics Co ltd
Current assignee: Foshan Veco Electronics Co ltd
Priority date: 2021-06-25
Filing date: 2021-06-25
Publication date: 2021-11-26
Anticipated expiration: 2031-06-25

Abstract

The utility model discloses a micro loudspeaker contains the framework, sets up the vibrating diaphragm in the framework, and sets up magnetic structure and voice coil loudspeaker voice coil in the framework, the upside rigid coupling of voice coil loudspeaker voice coil extremely the vibrating diaphragm, magnetic structure set up in the voice coil loudspeaker voice coil below, be provided with voice coil loudspeaker voice coil balanced system in the framework, constitute by the bullet ripples that two symmetries set up, set up respectively the both ends below of the major axis of voice coil loudspeaker voice coil to it is fixed with the viscose, wherein, bullet ripples comprises flexible circuit board, contains first end, second tip and connection first end with the cantilever of second end, wherein, the length of cantilever and the ratio of cantilever distribution distance are between 2 to 15. The utility model discloses a set up FPC bullet ripples on the voice coil loudspeaker voice coil, can provide sufficient elasticity and damping to reduce the vibration of voice coil loudspeaker voice coil lead wire, and then improve rated power, and the life-span test under the high power operation.

Description

Micro speaker and damper for micro speaker

Technical Field

The utility model relates to a speaker equipment technical field specifically is a miniature speaker and play ripples that is used for miniature speaker.

Background

A speaker is a transducer element that converts an electrical signal into an acoustic signal, and is an important acoustic component in electronic products. The speaker module generally includes a frame, and a magnetic circuit system and a vibration system disposed in the frame, wherein the vibration system includes a diaphragm and a voice coil disposed below the diaphragm. The voice coil drives the diaphragm to sound under the vibration effect of the magnetic circuit system.

As electronic products are highly pursuing portability, reducing the volume is a necessary goal when various micro-speaker products are updated, but the reduction of the volume means that the volume of the magnet of the micro-speaker must be reduced at the same time, resulting in a reduction in the sound volume. If the volume reduction caused by the magnet becoming smaller is compensated by increasing the power, the micro-speaker is exposed to the risk of breaking the voice coil lead due to the too large amplitude.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a micro speaker and a damper for the micro speaker to solve the above-mentioned problems in the background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a micro loudspeaker, contains the framework, sets up the vibrating diaphragm in the framework, and sets up magnetic structure and voice coil loudspeaker voice coil in the framework, the upside rigid coupling of voice coil loudspeaker voice coil extremely the vibrating diaphragm, magnetic structure set up in the voice coil loudspeaker voice coil below, be provided with voice coil loudspeaker voice coil balanced system in the framework, it comprises the bullet ripples that two symmetries set up, sets up respectively the both ends below of the major axis of voice coil loudspeaker voice coil to it is fixed with the viscose. The damper is formed by a flexible circuit board and comprises a first end part, a second end part and a cantilever connecting the first end part and the second end part. The ratio of the length of the cantilever to the distribution distance of the cantilever is between 2 and 15.

According to the utility model discloses the embodiment, bullet ripples is bilateral symmetry's structure.

According to an embodiment of the present invention, the cantilever is copper-free on the front side of the damper, revealing the surface of the substrate.

According to an embodiment of the present invention, the base material may be made of a polymer material.

According to the embodiment of the utility model provides a voice coil loudspeaker voice coil lead wire through electron spot welding rigid coupling in the positive of bullet ripples on the weld part of first end, be connected to via the conducting hole again circuit on the bottom surface of bullet ripples is connected to the electricity is connected to the connecting terminal of second end bottom surface.

According to the utility model discloses, the welding of external signal wire is to the bottom surface of second tip connecting terminal.

According to the utility model discloses the embodiment, the width of cantilever is 0.45 mm.

According to the utility model discloses, the vibrating diaphragm sets up to long and narrow shape, and its ascending size of length direction is greater than the ascending size of width direction.

According to the embodiment of the utility model provides a, the framework have with the opening of vibrating diaphragm shape looks adaptation, just the vibrating diaphragm is connected through annular dangling limit in the framework, in order to seal the opening.

According to the utility model discloses, magnetic structure includes that main magnetic part, ring locate the limit magnetism portion of main magnetic part periphery, and be located main magnetic part with the yoke of limit magnetism portion below, main magnetic part with be provided with the magnetic gap between the limit magnetism portion, just the voice coil loudspeaker voice coil cover is located main magnetic part periphery and penetrate along upper and lower direction the magnetic gap.

According to the embodiment of the utility model provides a main magnetic part with be provided with the gasket that is used for the magnetic conduction on the limit magnetism part respectively.

According to the utility model discloses, the bullet ripples passes through first tip is fixed in with the viscose the both ends below of the major axis of voice coil loudspeaker voice coil, and pass through the second tip is fixed in with the viscose the both ends below of the major axis of framework.

Another aspect of the present invention is to provide an elastic wave for a micro-speaker, which comprises a first end, a second end and a cantilever connected to the first end and the second end, wherein the length of the cantilever and the distribution distance of the cantilever have a ratio between 2 and 15. The elastic wave is formed by a flexible circuit board.

According to the embodiment of the utility model provides a voice coil loudspeaker voice coil lead wire through soldering tin electron spot welding rigid coupling in the positive of bullet ripples on the weld part of first end, be connected to via the conducting hole again circuit on the bottom surface of bullet ripples is connected to the electricity is connected to the connecting terminal of second end bottom surface.

Compared with the prior art, the beneficial effects of the utility model are that: the elastic wave formed by the flexible circuit board is arranged on the voice coil, so that sufficient elasticity and damping can be provided, the vibration of the lead of the voice coil is reduced, the rated power is further improved, and the service life under high-power operation is tested.

Drawings

Fig. 1 is an external schematic view of a micro-speaker according to an embodiment of the present invention.

Fig. 2 is an exploded view of the micro-speaker of fig. 1.

Fig. 3 illustrates a front layout of the damper.

Fig. 4 illustrates a bottom layout of the damper.

Fig. 5 shows cantilever length L, width W and distribution distance D of the bullet wave.

Description of reference numerals: 1-a micro-speaker; 10-a frame body; 20-drum paper; 201-a diaphragm; 202-overhanging fringe; 30-magnetic circuit structure; 301-a main magnetic portion; 302-edge magnetic part; 303-yoke iron; 40-a voice coil; 402a, 402 b-voice coil leads; 50-a voice coil balance system; 501-elastic wave; 501 a-first end portion; 501 b-second end; 501 c-cantilever; 511a, 511 b-welds; 512a, 512 b-via holes; 531a, 531 b-connection terminal; 601. 602-a shim; 701. 702-external signal conductors; l-length; d-distribution distance; w-width.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1 and 2, fig. 1 is an external schematic view of a micro-speaker according to an embodiment of the present invention. Fig. 2 is an exploded view of the micro-speaker of fig. 1. As shown in fig. 1 and 2, according to the embodiment of the present invention, the micro-speaker 1 includes a frame 10 and drum paper (drum paper)20 disposed on the frame 10. According to the embodiment of the present invention, the drum paper 20 may include a diaphragm (diaphragm)201 and a suspension edge (surround)202 surrounding the diaphragm 201 and having an arc-shaped or wavy cross section. According to the embodiment of the present invention, the diaphragm 201 and the suspension edge 202 may be made of different materials, but are not limited thereto.

According to the embodiment of the present invention, preferably, the drum paper 20 is flexibly connected to the upper end of the frame body 10. According to the embodiment of the present invention, the diaphragm 201 is set to be long and narrow, i.e. the dimension in the length direction is greater than the dimension in the width direction. According to the embodiment of the present invention, the frame body 10 has an opening adapted to the shape of the drum paper 20 and the diaphragm 201, and the diaphragm 201 is connected to the frame body 10 through the annular hanging edge 202 to seal the opening.

According to the embodiment of the present invention, a magnetic structure 30 is provided in the frame 10, and includes a main magnetic portion 301, a side magnetic portion 302 surrounding the main magnetic portion 301, and a yoke 303 located below the main magnetic portion 301 and the side magnetic portion 302. According to the embodiment of the present invention, a magnetic gap is provided between the main magnetic portion 301 and the side magnetic portion 302. According to the embodiment of the present invention, spacers (washbher) 601 and 602 for magnetic conduction are respectively disposed on the main magnetic portion 301 and the side magnetic portion 302.

According to the embodiment of the present invention, a voice coil (voice coil)40 is additionally disposed in the frame 10. According to the embodiment of the utility model provides a voice coil 40 is formed by the independent coiling of enameled wire to need not voice coil loudspeaker voice coil sleeve (bobbin). The voice coil 40 is sleeved on the outer periphery of the main magnetic portion 301 and penetrates into the magnetic gap along the vertical direction. According to the utility model discloses, voice coil 40 sets up to long and narrow shape, and its ascending size of length direction is greater than the ascending size of width direction promptly, and voice coil 40's upper end and vibrating diaphragm 201 fixed connection. Preferably, in the embodiment of the present invention, the center of the voice coil 40 is located on the central axis in the length direction of the diaphragm 201. The magnetic field provided by the magnetic circuit structure vibrates the voice coil 40, driving the diaphragm 201 to vibrate and sound.

According to the embodiment of the present invention, a voice coil balance system 50 is further disposed in the frame 10, and mainly comprises two symmetrical elastic waves (damper) 501. According to the utility model discloses, two play ripples 501 are set up in the both ends below of the major axis of voice coil loudspeaker voice coil 40 to the viscose is fixed. According to the embodiment of the present invention, the damper 501 is formed by a Flexible Printed Circuit (FPC).

According to the embodiment of the present invention, the damper 501 mainly includes a first end 501a, a second end 501b, and a cantilever 501c connecting the first end 501a and the second end 501 b. A hollow part is arranged between the first end part 501a, the second end part 501b and the cantilever 501 c. The damper 501 is fixed to the lower portions of both ends of the long axis of the voice coil 401 by a first end 501a and is fixed to the lower portions of both ends of the long axis of the frame 10 by a second end 501 b. The voice coil leads 401a and 401b are fixedly attached to the

soldering portions

511a and 511b of the first end portion 501a of the front surface of the damper 501 by electronic spot welding, respectively, are electrically connected to the circuit on the bottom surface of the damper 501, and are further electrically connected to the connection terminals on the bottom surface of the second end portion 501b through the circuit on the damper 501.

According to the embodiment of the utility model provides a, the connecting terminal of second end 501b bottom surface welds outside

signal wire

701 and 702 respectively again, with external connection to with outside sound source signal through the input of bullet ripples 501, make vibrating diaphragm 201 vibration sound production.

Referring to fig. 3 to 5, fig. 3 illustrates a front layout of the damper 501, fig. 4 illustrates a bottom layout of the damper 501, and fig. 5 shows a length L, a width W and a distribution distance D of the cantilever 501c of the damper 501. As shown in fig. 3 and 4, the damper 501 has a bilaterally symmetrical structure. In order for the FPC clip 501 to provide sufficient resiliency and damping, the cantilever 501c is free of a copper layer on the front side of the clip 501, revealing the surface of the substrate. According to an embodiment of the present invention, the base material may be made of a polymer material, such as, but not limited to, polyimide (polyimide) resin.

As shown in fig. 3 and 4, the voice coil leads 402a and 402b may be respectively fixed to the

soldering portions

511a and 511b of the first end portion 501a on the front surface of the spider 501 by electronic spot welding and then respectively connected to the circuit on the bottom surface of the spider 501 through the via

holes

512a and 512b, that is, only on the bottom surface of the spider 501, the cantilever 501c has a copper layer (as shown in fig. 4), and is respectively electrically connected to the

connection terminals

531a and 531b on the bottom surface of the second end portion 501 b. The aforementioned

external signal wires

701 and 702 may be soldered to the

connection terminals

531a and 531b on the bottom surface of the second end portion 501b, respectively. According to the embodiment of the utility model provides a, only leave the single face copper layer on the cantilever 501c, so just can provide sufficient elasticity and damping, through the life-span test under the high power operation.

As shown in fig. 5, the length L of the cantilever 501c refers to the length from the connection terminal 531a to the soldering portion 511a, and the cantilever distribution distance D refers to the width of the serpentine or bent cantilever 501c distributed between the first end 501a and the second end 501 b. According to the utility model discloses, use the cantilever width to be 0.45mm as an example, cantilever length L and cantilever distribution distance D's ratio needs to be between 2 to 15.

The utility model discloses a set up two independent FPC bullet ripples 501 as the medium, will be originally by the voice coil loudspeaker voice coil amplitude that the voice coil loudspeaker voice coil lead wire bore, become to bore by FPC bullet ripples 501. The FPC damper 501 can provide sufficient elasticity and damping so that the micro-speaker can also absorb the amplitude of high power, thereby increasing the rated power (providing a large volume even when the volume is reduced), and performing a life test under high power operation. In addition, two independent FPC bullet ripples 501 can be according to the vibration mode of vibrating diaphragm 201, adjustment shape, style and thickness, and then make miniature speaker vibration action optimize more to provide better sound quality. The two independent FPC clips 501 may be connected to the frame 10 in advance during the manufacturing process to form a semi-finished product, which simplifies the complexity of the assembly and manufacturing process of the micro-speaker.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A micro-speaker, comprising: the voice coil structure comprises a frame body, a vibrating diaphragm arranged on the frame body, and a magnetic circuit structure and a voice coil arranged in the frame body, wherein the upper side of the voice coil is fixedly connected to the vibrating diaphragm, and the magnetic circuit structure is arranged below the voice coil.

2. The micro-speaker of claim 1, wherein said damper is a symmetrical structure.

3. The microspeaker of claim 1 wherein the cantilever is free of copper layers on the front surface of the damper, revealing the surface of the substrate.

4. A microspeaker as claimed in claim 3 wherein the substrate is formed of a polymeric material.

5. The micro-speaker as claimed in claim 1, wherein a voice coil lead is fixed to the soldering portion of the first end portion of the front surface of the damper by electronic spot welding and is electrically connected to the connection terminal of the bottom surface of the second end portion via a via hole to be connected to the circuit on the bottom surface of the damper.

6. The micro-speaker as claimed in claim 5, wherein an external signal wire is soldered to the connection terminal of the bottom surface of the second end portion.

7. A microspeaker as claimed in claim 1 wherein the width of the cantilever is 0.45 mm.

8. A micro-speaker as claimed in claim 1, wherein the diaphragm is elongate and has a dimension in a length direction greater than a dimension in a width direction.

9. The micro-speaker of claim 8, wherein the frame has an opening adapted to the shape of the diaphragm, and the diaphragm is connected to the frame by an annular overhang to seal the opening.

10. The micro-speaker as claimed in claim 1, wherein the magnetic structure comprises a main magnetic portion, a side magnetic portion surrounding the main magnetic portion, and a yoke located below the main magnetic portion and the side magnetic portion, a magnetic gap is disposed between the main magnetic portion and the side magnetic portion, and the voice coil is sleeved on the main magnetic portion and penetrates the magnetic gap in the up-down direction.

11. The micro-speaker as claimed in claim 10, wherein spacers for magnetic conduction are provided on the main magnetic portion and the side magnetic portion, respectively.

12. The micro-speaker as claimed in claim 1, wherein the damper is fixed below two ends of the long axis of the voice coil by the first end portion and fixed below two ends of the long axis of the frame by the second end portion.

13. An acoustic wave for a micro-speaker, comprising: the elastic wave device comprises a first end part, a second end part and a cantilever connecting the first end part and the second end part, wherein the ratio of the length of the cantilever to the distribution distance of the cantilever is between 2 and 15, and the elastic wave is formed by a flexible circuit board.

14. The damper for a microspeaker of claim 13 wherein the damper is a side-to-side symmetric structure.

15. The damper for a microspeaker of claim 13 wherein the cantilever is free of copper layers on the front face of the damper, revealing the surface of the substrate.

16. The damper for a microspeaker as claimed in claim 15 wherein said substrate is formed of a polymeric material.

17. The damper for a micro-speaker as claimed in claim 13, wherein the voice coil lead is fixed to the soldering portion of the first end portion of the front surface of the damper by electronic spot welding and is connected to the circuit on the bottom surface of the damper through a via hole to be electrically connected to the connection terminal on the bottom surface of the second end portion.

18. The damper for a micro-speaker as claimed in claim 17, wherein an external signal wire is soldered to the connection terminal of the bottom surface of the second end portion.

19. The damper for a microspeaker as defined in claim 13 wherein the width of the cantilever is 0.45 mm.