CN215912218U - Micro speaker and damper for micro speaker - Google Patents

Abstract

The utility model discloses a micro loudspeaker, which 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, the magnetic circuit structure is arranged below the voice coil, a voice coil balance system is arranged in the frame body, the voice coil balance system is composed of two symmetrically arranged elastic waves and two symmetrically arranged elastic pieces, the two elastic waves are arranged below two ends of a long shaft of the frame body in pairs and are fixed by viscose, the elastic waves are composed of a flexible circuit board and comprise a first end part, a second end part and a cantilever connecting the first end part and the second end part, and the ratio of the length L of the cantilever to the distribution distance D of the cantilever is between 2 and 15.

Description

Micro speaker and damper for micro speaker

Technical Field

The utility model relates to the technical field of loudspeaker equipment, in particular to a micro loudspeaker and an elastic wave for the micro loudspeaker.

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

The present invention has been made in an effort to solve the above-mentioned problems occurring in the prior art, and a primary object of the present invention is to provide a micro-speaker and a damper for the micro-speaker.

In order to achieve the purpose, the utility model provides the following technical scheme:

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, the magnetic circuit structure is arranged below the voice coil, a voice coil balance system is arranged in the frame body and consists of two symmetrically arranged elastic waves and two symmetrically arranged elastic pieces, the two elastic waves are arranged in pairs and are arranged at installation parts below two ends of a long shaft of the frame body and fixed by viscose, the elastic waves consist of a flexible circuit board and comprise a first end part, a second end part and a cantilever connected with the first end part and the second end part, and the ratio of the length L of the cantilever to the distribution distance D of the cantilever is between 2 and 15.

According to the embodiment of the utility model, the elastic wave is of a bilaterally symmetrical structure.

According to an embodiment of the utility model, the cantilever is free of a copper layer on the front side of the spider.

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

According to the embodiment of the utility model, the voice coil lead is fixedly connected to the welding part in the middle of the first end part of the damper through electronic spot welding and is electrically connected to the circuit on the damper and the connecting terminal of the second end part.

According to an embodiment of the present invention, an external signal wire is soldered to the connection terminal of the second end portion.

According to an embodiment of the utility model, the cantilever has a width of 0.45 mm.

According to the embodiment of the present invention, the diaphragm is provided in a long and narrow shape, and a dimension in a length direction thereof is larger than a dimension in a width direction thereof.

According to the embodiment of the utility model, the frame body is provided with an opening matched with the shape of the diaphragm, and the diaphragm is connected to the frame body through the annular suspension edge so as to seal the opening.

According to an embodiment of the present invention, the magnetic circuit structure includes a main magnetic portion and a yoke located below the main magnetic portion, a magnetic gap is provided between the main magnetic portion and the yoke, and the voice coil is sleeved on an outer periphery of the main magnetic portion and penetrates through the magnetic gap in an up-down direction.

According to the embodiment of the utility model, the main magnetic part is provided with the washer for magnetic conduction.

According to the embodiment of the utility model, the elastic wave is fixed below two ends of the long shaft of the frame body through the second end part by using the adhesive.

According to an embodiment of the utility model, the elastic member is a sandwich-structured composite membrane.

According to an embodiment of the present invention, the composite film comprises a polyetheretherketone/glue layer/polyetheretherketone, a thermoplastic polyester elastomer/glue layer/thermoplastic polyester elastomer, wherein the glue layer is an acrylic series of glue.

According to an embodiment of the utility model, the resilient member is a single material.

According to an embodiment of the utility model, the single material is silicone.

According to an embodiment of the utility model, the elastic member comprises an inner edge portion and an outer edge portion, the shape of which corresponds to the first end portion and the second end portion of the damper, respectively, wherein the elastic member is attached to the first end portion and the second end portion of the damper by the inner edge portion and the outer edge portion, respectively.

According to an embodiment of the utility model, the resilient member is provided with a connection between the inner rim portion and the outer rim portion, which has a wavy or curved cross-sectional profile and which has corrugations.

According to the embodiment of the utility model, the connecting part is discontinuous and is arranged at the corner, an opening is formed in the middle, and part of the elastic wave is exposed.

According to the embodiment of the utility model, the connecting part is continuous and covers the whole elastic wave.

Compared with the prior art, the utility model has the beneficial effects that: the voice coil balance system consisting of the flexible circuit board damper and the elastic piece is arranged on the voice coil, so that enough elasticity and damping can be provided, the vibration of the voice coil lead is reduced, the rated power is further improved, and the service life under high-power operation is tested.

Drawings

Fig. 1 is an external view of a micro-speaker according to an embodiment of the utility model.

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.

Fig. 6 is a bottom schematic view of a micro-speaker according to another embodiment of the utility model.

Fig. 7 is an exploded view of the micro-speaker of fig. 6.

Fig. 8 shows cantilever length L, width W and distribution distance D of the bullet wave.

Fig. 9 illustrates a front layout of the damper.

Fig. 10 illustrates a bottom layout of the damper.

Fig. 11 is a bottom schematic view of a micro-speaker according to yet another embodiment of the utility model.

Description of reference numerals: 1. 2-a micro-speaker; 10-a frame body; 101-a mounting portion; 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; 303 a-air gap; 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, 511b, 511 c-welds; 512a, 512b, 512 c-via; 531a, 531 b-connection terminal; 502-a resilient member; 502 a-inner edge portion; 502 b-outer rim portion; 502 s-linker; 502 p-opening; 502 t-truncated portion; 601. 602-washer; 701. 702-external signal conductors; l-length; d-distribution distance; w-width.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model.

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 and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. 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 a schematic external view of a micro-speaker according to an embodiment of the utility model. Fig. 2 is an exploded view of the micro-speaker of fig. 1. As shown in fig. 1 and 2, according to an 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 an 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 wave-shaped 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, it is preferable that the drum paper 20 is flexibly attached to the upper end of the frame body 10. According to an embodiment of the present invention, the diaphragm 201 is provided in a long and narrow shape, i.e., a dimension in a length direction thereof is larger than a dimension in a width direction thereof. According to the embodiment of the present invention, the frame 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 10 by 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 disposed around the outer periphery of 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, washers (washbers) 601 and 602 for magnetic conduction are respectively disposed on the main magnetic part 301 and the side magnetic part 302.

According to the embodiment of the present invention, a voice coil (voice coil)40 is further disposed in the frame 10. According to the embodiment of the present invention, the voice coil 40 is formed by separately winding an enameled wire, and a voice coil sleeve (bobbin) is not required. 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 embodiment of the present invention, the voice coil 40 is formed in a long and narrow shape, that is, the dimension in the length direction is larger than the dimension in the width direction, and the upper end of the voice coil 40 is fixedly connected to the diaphragm 201. 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 symmetrically disposed damper (damper) 501. According to the embodiment of the present invention, the two elastic waves 501 are disposed below both ends of the long axis of the voice coil 40 and fixed by adhesive. According to the embodiment of the present invention, the damper 501 is formed of 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 adhesive at the first end portion 501a, and is fixed to the lower portions of both ends of the long axis of the frame 10 by adhesive at the second end portion 501 b. The voice coil leads 402a and 402b 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, electrically connected to the circuit on the bottom surface of the damper 501, and 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 present invention, the connection terminals on the bottom surface of the second end portion 501b are respectively soldered to the external signal wires 701 and 702, and are connected to the outside to input an external sound source signal through the elastic wave 501, so that the diaphragm 201 vibrates to generate sound.

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 FPC clip 501 to provide sufficient resiliency and damping, cantilever 501c is free of copper layers on the front side of clip 501. According to an embodiment of the present invention, the substrate 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 present invention, since only a single-sided copper layer is left on the cantilever 501c, sufficient elasticity and damping can be provided to pass the life test under high power operation.

As shown in fig. 5, the length L of the cantilever 501c refers to the length of the cantilever 501c from the first end 501a to the second end 501b, 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 embodiment of the present invention, taking the width of the cantilever as 0.45mm as an example, the ratio of the length L of the cantilever to the distribution distance D of the cantilever needs to be between 2 and 15.

The utility model changes the voice coil amplitude originally born by the lead of the voice coil into the voice coil amplitude born by the FPC elastic wave 501 by arranging two independent FPC elastic waves 501 as media. 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 more optimize 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.

Fig. 6 is a bottom schematic view of a micro-speaker according to another embodiment of the utility model. Fig. 7 is an exploded view of the micro-speaker of fig. 6. As shown in fig. 6 and 7, the micro-speaker 2 similarly includes a housing 10 and a drum paper 20 provided on the housing 10. According to an embodiment of the present invention, the tympanum 20 may include a diaphragm 201 and a suspension edge 202 surrounding the diaphragm 201. The cross-section of the hanging edge 202 may be an arc-like or wavy structure. 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, it is preferable that the drum paper 20 is flexibly attached to the upper end of the frame body 10. According to an embodiment of the present invention, the diaphragm 201 is provided in a long and narrow shape, i.e., a dimension in a length direction thereof is larger than a dimension in a width direction thereof. According to the embodiment of the present invention, the frame 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 10 by the annular hanging edge 202 to seal the opening.

According to the embodiment of the present invention, a magnetic path structure 30 including a main magnetic portion 301 and a yoke 303 located below the main magnetic portion 301 is provided in the frame 10. According to the embodiment of the present invention, the magnetic structure 30 is a single-magnet magnetic circuit system, that is, no side magnet portions are disposed on both sides of the main magnet portion 301. According to an embodiment of the present invention, the yoke 303 has a U-shaped profile in cross section. According to the embodiment of the present invention, the yoke 303 is slightly shorter in length than the main magnetic portion 301 and wider than the main magnetic portion 301. According to the embodiment of the present invention, a magnetic gap is provided between the main magnetic portion 301 and the yoke 303. According to the embodiment of the present invention, a washer 601 for magnetic conduction is disposed on the main magnetic portion 301.

According to the embodiment of the present invention, a voice coil 40 is additionally disposed in the frame 10. According to the embodiment of the present invention, the voice coil 40 is formed by separately winding an enameled wire, and a voice coil sleeve is not required. 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 embodiment of the present invention, the voice coil 40 is formed in a long and narrow shape, that is, the dimension in the length direction is larger than the dimension in the width direction, and the upper end of the voice coil 40 is fixedly connected to the diaphragm 201. 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.

In accordance with the embodiment of the present invention, a voice coil balance system 50 is also disposed in the housing 10, and mainly comprises two symmetrically disposed damper 501 and two symmetrically disposed elastic members (elastic members) 502. According to the embodiment of the present invention, the two elastic waves 501 and the two elastic members 502 are paired with each other and disposed at the mounting portions 101 below the two ends of the long axis of the frame body 10, for example, one elastic wave 501 and one elastic member 502 may be fixed to the recessed mounting portions 101 of the frame body 10 together with an adhesive.

According to the embodiment of the present invention, the damper 501 is formed of a flexible circuit board. As shown in fig. 9 and 10, the voice coil lead may be fixed to the soldering portion 511c of the first end portion 501a of the front surface of the damper 501 by electronic spot welding, and the soldering portion 511c may be plated with tin or other solderable material. And is connected to the circuit on the bottom surface of the spider 501 through the via 512c, that is, only on the bottom surface of the spider 501, the cantilever 501c has a copper layer (the copper layer is shown as a blank area in fig. 9 and 10), and is electrically connected to the connection terminals 531a and 531b on the bottom surface of the second end portion 501 b. On the front surface of the elastic wave 501, the cantilever 501c may be exposed from the substrate surface or covered with an insulating layer (e.g., a dot region in fig. 9). The external signal wires 701 and 702 may be soldered to the connection terminals 531a or 531b on the bottom surfaces of the second end portions 501b on both sides, respectively.

According to an embodiment of the present invention, the elastic member 502 may be a composite film of a sandwich structure, for example, Polyetheretherketone (PEEK)/adhesive layer/PEEK, thermoplastic polyester elastomer (TPEE)/adhesive layer/TPEE, but not limited thereto, wherein the adhesive layer may be an acryl series adhesive, but not limited thereto. According to another embodiment of the present invention, the elastic member 502 may be a single material, such as, but not limited to, silicone (silicone). The resilient member 502 may further increase the stability of the voice coil 40 during movement.

According to an embodiment of the present invention, as shown in fig. 8, the damper 501 also 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 mounting portions 101 below both ends of the long axis of the housing 10 by adhesive at the second end 501 b. Voice coil leads 402a and 402b located below both ends of the long axis of the voice coil 401 are respectively fixedly connected to a soldering portion 511c in the middle of the first end portion 501a of the spider 501 by electronic spot welding, electrically connected to the circuit on the bottom surface of the spider 501 through via holes, and further electrically connected to connection terminals 531a and 531b of the second end portion 501b through the circuit on the bottom surface of the spider 501. According to the embodiment of the present invention, the welding portion 511c protrudes from the first end 501a at a substantially middle position toward the second end 501b, and is located between the two cantilevers 501 c. According to the embodiment of the present invention, the provision of the welding portion 511c at the middle position of the first end portion 501a can improve the yield of the electron spot welding.

According to the embodiment of the present invention, the circuit on the damper 501 may be a single-sided circuit, that is, only a single-sided copper layer is disposed on the bottom surface of the damper 501, so that sufficient elasticity and damping can be provided. In other embodiments, however, the circuitry on the spider 501 may be a double-sided circuit.

According to the embodiment of the present invention, as shown in fig. 8, the length L of the cantilever 501c refers to the length of the cantilever 501c from the first end 501a to the second end 501b, 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 embodiment of the present invention, taking the width of the cantilever as 0.45mm as an example, the ratio of the length L of the cantilever to the distribution distance D of the cantilever needs to be between 2 and 15.

According to an embodiment of the present invention, the elastic member 502 includes an inner edge portion 502a and an outer edge portion 502b, which are shaped to correspond to the first end portion 501a and the second end portion 501b of the damper 501, respectively. The elastic member 502 is attached to the first end 501a and the second end 501b of the damper 501 by the inner edge 502a and the outer edge 502b, respectively. Between the inner and outer rim portions 502a, 502b is a connecting portion 502s, which may have a wavy or arcuate cross-sectional profile, and may have corrugations. According to the embodiment of the present invention, the connection portion 502s may be discontinuous, for example, the connection portion 502s is only disposed at the corner, and there may be an opening 502p in the middle to expose part of the damper 501. According to another embodiment of the present invention, as shown in fig. 11, the connection portion 502s may be continuous and cover the entire elastic wave 501. In fig. 11, the shape and structure of the damper 501 may be the same as those of fig. 2 to 5, and a plurality of air gaps 303a may be provided on the bottom surface of the yoke 303.

According to an embodiment of the present invention, the elastic member 502 includes a truncated portion (transition) 502t, which exposes the connection terminals 531a and 531b of the second end portion 501b, and the external signal wires 701 and 702 are soldered to the connection terminals 531a and 531b, respectively, and connected to the outside to input an external sound source signal through the damper 501, so that the diaphragm 201 vibrates to emit sound.

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 (19)

1. A micro-speaker, comprising: the voice coil balance 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, the magnetic circuit structure is arranged below the voice coil, and the voice coil balance structure is characterized in that a voice coil balance system is arranged in the frame body and consists of two symmetrically arranged elastic waves and two symmetrically arranged elastic pieces, the two elastic waves are arranged in pairs and are arranged at installation parts below two ends of a long shaft of the frame body and fixed by viscose, wherein the elastic waves consist of a flexible circuit board and comprise a first end part, a second end part and a cantilever connected with the first end part and the second end part, and the ratio of the length L of the cantilever to the distribution distance D of the cantilever is between 2 and 15.

2. The micro-speaker of claim 1, wherein the damper is a bilaterally symmetric structure.

3. The microspeaker of claim 1 wherein the cantilever is free of copper layers on the front face of the damper.

4. The micro-speaker of claim 3, wherein the substrate of the damper is formed of a polymeric material.

5. The micro-speaker of claim 1, wherein a voice coil lead is secured to the solder at the center of the first end of the damper by electronic spot welding and electrically connected to the circuit on the damper and the connection terminal at the second end.

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

7. The micro-speaker of claim 1, wherein the cantilever arm has a width of 0.45 mm.

8. The micro-speaker as claimed in claim 1, wherein the diaphragm is provided in an elongated shape, and a dimension in a length direction thereof is larger than a dimension in a width direction thereof.

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 and a yoke located below the main magnetic portion, a magnetic gap is provided between the main magnetic portion and the yoke, and the voice coil is sleeved on the outer periphery of the main magnetic portion and penetrates the magnetic gap in the up-down direction.

11. The micro-speaker as claimed in claim 10, wherein a washer for magnetic conduction is provided on the main magnetic part.

12. The micro-speaker as claimed in claim 1, wherein the elastic wave is fixed below two ends of the long axis of the frame body through the second end portion by adhesive.

13. The micro-speaker as claimed in claim 1, wherein the elastic member is a composite film of a sandwich structure.

14. The micro-speaker of claim 1, wherein the resilient member is a single material.

15. The microspeaker of claim 14 wherein the single material is silicone.

16. The micro-speaker of claim 1, wherein the elastic member comprises an inner edge portion and an outer edge portion having shapes corresponding to the first end portion and the second end portion of the damper, respectively, wherein the elastic member is adhered to the first end portion and the second end portion of the damper through the inner edge portion and the outer edge portion, respectively.

17. The micro-speaker of claim 16, wherein the elastic member is provided with a connecting portion between the inner and outer edge portions, which has a wavy or arcuate cross-sectional profile, and which has corrugations.

18. The micro-speaker of claim 17, wherein said connecting portion is discontinuous and is disposed at a corner with an opening therebetween to expose a portion of said damper.

19. The microspeaker of claim 17 wherein the connecting portion is continuous and covers the entirety of the damper.

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