CN212696207U

CN212696207U - Loudspeaker

Info

Publication number: CN212696207U
Application number: CN202021879026.5U
Authority: CN
Inventors: 王兴龙; 刘琦琦
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2021-03-12
Anticipated expiration: 2030-08-31

Abstract

The utility model discloses a loudspeaker, which comprises a shell, a vibration system and a magnetic circuit system, wherein the vibration system comprises a vibrating diaphragm and a voice coil for driving the vibrating diaphragm to vibrate, and the magnetic circuit system comprises a magnetic yoke, a central magnetic circuit structure and a side magnetic circuit structure which are arranged above the magnetic yoke; a gap is formed between the shell and the side magnetic structure, the loudspeaker also comprises an elastic supporting piece which is fixed on the shell and is positioned below the vibrating diaphragm, a conductive framework is connected between the vibrating diaphragm and the elastic supporting piece, the conductive framework comprises a side wall arranged between the vibrating diaphragm and the elastic supporting piece, the side wall is positioned in the gap, and the conductive framework is provided with a first bonding pad and a second bonding pad; the elastic supporting piece comprises a balance vibrating diaphragm and a centering support piece, the first bonding pad is connected with the voice coil wire of the voice coil, and the second bonding pad is connected with an external circuit through the centering support piece. The utility model discloses a conducting framework and centering support piece realize switching on between voice coil loudspeaker voice coil and the external circuit, have reduced the degree of difficulty that switches on to need not break magnetic circuit and dodge, improve the acoustic performance of product.

Description

Loudspeaker

Technical Field

The utility model relates to an acoustics device technical field, in particular to speaker.

Background

A speaker is a transducer for converting an electrical signal into an acoustic signal, and is widely used in electronic products such as mobile phones, computers, earphones, and the like. The micro-speaker generally comprises a vibration system, a magnetic circuit system and a support system, wherein the vibration system comprises an upper vibration system and a lower vibration system, the upper vibration system comprises a voice coil and a vibrating diaphragm, the lower vibration system comprises an elastic support member, and the upper vibration system and the lower vibration system are respectively arranged at the upper part and the lower part of a product structure. Due to the above structural characteristics of the speaker space, the difficulty of conduction between the voice coil of the speaker and an external circuit is large.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a loudspeaker, the voice coil loudspeaker voice coil that aims at solving among the prior art loudspeaker switches on the big problem of the degree of difficulty with outside pad.

In order to achieve the above object, the present invention provides a speaker, which includes a housing, a vibration system and a magnetic circuit system, wherein the vibration system includes a vibrating diaphragm and a voice coil for driving the vibrating diaphragm to vibrate, and the magnetic circuit system includes a magnetic yoke, a central magnetic circuit structure and a side magnetic circuit structure, which are disposed above the magnetic yoke;

the side magnetic circuit structure is an annular structure;

a gap is formed between the shell and the side magnetic structure, the loudspeaker also comprises an elastic supporting piece which is fixed on the shell and positioned below the vibrating diaphragm, and a conductive framework is connected between the vibrating diaphragm and the elastic supporting piece;

the conductive framework comprises a top wall, a bottom wall and a side wall connected between the top wall and the bottom wall, the top wall is connected with the vibrating diaphragm, a first bonding pad is arranged on the top wall, the side wall and the bottom wall are positioned in the gap, the bottom wall is connected with the elastic supporting piece, and a second bonding pad is arranged on the bottom wall or the side wall;

elastic support spare includes the centering branch piece that balanced vibrating diaphragm and FPCB material were made, first pad with the voice coil wire connection of voice coil loudspeaker voice coil, the second pad passes through centering branch piece and external circuit are connected.

Preferably, the centering support piece includes fixed arm and vibration arm, the fixed arm encloses to be located vibration arm outer and with the shell bottom is connected, vibration arm certainly the fixed arm to extend in the clearance and with electrically conductive skeleton connects, vibration arm is provided with inside pad, the fixed arm is provided with outside pad, inside pad with the second pad is connected, outside pad is connected with external circuit.

Preferably, the vibrating arm is strip-shaped, the vibrating arm is followed the clearance extends, the both ends of vibrating arm are link and free end respectively, the link with the fixed arm is connected, the free end is kept away from the link, inside pad is close to the free end sets up.

Preferably, the speaker comprises an opposing pair of long sides and an opposing pair of short sides, the gap comprises two short lanes corresponding to the two short sides; the fixed arm is rectangle annular structure, the minor axis of fixed arm with the short road corresponds the setting, the vibration arm is followed the short road extends, just the link with the minor axis side of fixed arm is connected.

Preferably, the vibration arm includes an extension portion located between the connection end and the free end, the extension portion is parallel to the short axis side of the fixing arm, the connection end is bent and extended to be connected with the fixing arm, and the free end is bent and extended to be connected with the second pad.

Preferably, said fixed arm has a connection between one of said minor axes and two major axes forming two corners, said connection end being connected to said fixed arm adjacent one of said corners and said free end being adjacent the other of said corners.

Preferably, the centering branch piece is of an integrated structure or a split structure.

Preferably, the conductive framework is a metal product, and the first pad and the second pad are formed on part of the conductive framework; alternatively, the first and second electrodes may be,

the conducting framework is a non-metal product, the conducting layer is laid on the surface of the conducting framework or the conducting layer is embedded in the conducting framework, and the first bonding pad and the second bonding pad are formed on the conducting layer.

Preferably, the speaker comprises an opposing pair of long sides and an opposing pair of short sides, the gap comprises two short lanes corresponding to the two short sides;

the conductive framework comprises two conductive frames corresponding to the short channels, and the second bonding pads correspond to the internal bonding pads and extend into the gaps.

Preferably, the quantity of balanced vibrating diaphragm is two, balanced vibrating diaphragm is including the first connecting portion, first ring portion and the second connecting portion that set gradually, first connecting portion bond in the diapire or centering piece, the second connecting portion bond in centering piece, first ring portion of folding corresponds the clearance sets up.

Preferably, the vibrating diaphragm includes central part, second collar portion and the fixed part that sets gradually from inside to outside, the roof bond in central part, second collar portion corresponds first collar portion sets up, the fixed part certainly second collar portion downwardly extending forms and fixes the outside of shell.

Preferably, the magnetic structure includes an annular edge magnet and an annular edge magnetic conductive plate disposed above the annular edge magnet, and the edge magnetic conductive plate and the housing are integrally formed, or the edge magnetic conductive plate and the housing are connected to each other in a split structure.

The technical scheme of the utility model, the speaker of this embodiment still includes electrically conductive skeleton, and during the vibration of voice coil loudspeaker voice coil drive vibrating diaphragm, electrically conductive skeleton and the elastic support piece synchronous vibration of being connected with the vibrating diaphragm effectively increase vibration system's anti-polarization performance, and then improve product acoustic performance. The gap is arranged between the shell and the side magnetic structure, the side wall and the bottom wall of the conductive framework are located in the gap, vibration is facilitated, and the gap provides a vibration space for the conductive framework. The conductive framework is provided with a first bonding pad and a second bonding pad, the first bonding pad is connected with a voice coil wire of the voice coil, and the second bonding pad is connected with an external circuit through the centering support piece, so that the conduction between the voice coil and the external circuit can be realized through the conductive framework and the centering support piece, the structure is ingenious, and the conduction difficulty is reduced. In addition, in the process that the voice coil and an external circuit are conducted by the conductive framework and the centering support piece, a magnetic circuit system does not need to be interrupted for avoiding, the size of the magnetic circuit system is not limited, and the acoustic performance of a product is improved to the greatest extent.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is an assembly view of a speaker according to an embodiment of the present invention at a viewing angle;

fig. 2 is an assembly view of a speaker according to another perspective of the present invention;

fig. 3 is an exploded view of a speaker according to an embodiment of the present invention;

fig. 4 is a schematic cross-sectional view of a speaker according to an embodiment of the present invention;

fig. 5 is a schematic view of a partially assembled speaker according to an embodiment of the present invention;

fig. 6 is a schematic perspective view of a centering support plate in a speaker according to an embodiment of the present invention

Fig. 7 is a schematic perspective view of a missile framework in a loudspeaker according to an embodiment of the present invention;

fig. 8 is a schematic cross-sectional view of a missile framework in a loudspeaker according to an embodiment of the present invention.

The reference numbers illustrate:

the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in 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.

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a loudspeaker.

As shown in fig. 1 to 6, a speaker 100 of the present embodiment includes a housing 10, a vibration system 20, and a magnetic circuit system 30, where the vibration system 20 includes a diaphragm 21 and a voice coil 22 for driving the diaphragm 21 to vibrate, the magnetic circuit system 30 includes a yoke 31, a central magnetic circuit structure 32 and a side magnetic circuit structure 33 disposed above the yoke 31, a gap 50 is formed between the housing 10 and the side magnetic circuit structure 33, the speaker 100 further includes an elastic support member 40 fixed to the housing 10 and located below the diaphragm 21, a conductive framework 60 is connected between the diaphragm 21 and the elastic support member 40, the conductive framework 60 includes a sidewall 63 disposed between the diaphragm 21 and the elastic support member 40, the sidewall 63 is located in the gap 50, and the conductive framework 60 is provided with a first pad 61 and a second pad 62; the elastic support member 40 includes a balance diaphragm 41 and a damper 70, the first pad 61 is connected to a voice coil wire 221 of the voice coil 22, and the second pad 62 is connected to an external circuit through the damper 70.

The side magnetic structure 33 of the present embodiment surrounds the periphery of the central magnetic structure 32 and forms a magnetic gap 34, the voice coil 22 is suspended in the magnetic gap 34, the magnetic gap 34 between the side magnetic structure 33 and the central magnetic structure 32 generates a magnetic field, and the voice coil 22 performs a reciprocating magnetic line-cutting motion in the magnetic gap 34 to drive the diaphragm 21 to vibrate, thereby driving the air to sound and completing the energy conversion between the electricity and the sound. The diaphragm 21 is disposed on the top of the housing 10, the elastic supporting member 40 is disposed below the diaphragm 21, and the elastic supporting member 40 is connected to the vibration system 20 and elastically supports the vibration system 20. The centering support sheet 70 in the elastic support member 40 can also perform a centering function on the vibration system 20, so that the vibration system 20 is inhibited from polarizing, and the acoustic performance of the product is improved.

The speaker 100 of the present embodiment further includes a conductive framework 60, the conductive framework 60 is disposed between the diaphragm 21 and the elastic support member 40, specifically, the top of the conductive framework 60 is connected to the diaphragm 21, and the bottom of the conductive framework 60 is connected to the balance diaphragm 41. When the voice coil 22 drives the diaphragm 21 to vibrate, the conductive framework 60 connected with the diaphragm 21 and the balance diaphragm 41 vibrate synchronously, so that the anti-polarization performance of the vibration system 20 is effectively improved, and the acoustic performance of the product is further improved. A gap 50 is formed between the casing 10 and the side magnetic structure 33, the side wall 63 of the conductive framework 60 is located in the gap 50, so that vibration is facilitated, and the gap 50 provides a vibration space for the conductive framework 60. The conductive framework 60 is provided with a first bonding pad 61 and a second bonding pad 62, the first bonding pad 61 is connected with a voice coil line 221 of the voice coil 22, and the second bonding pad 62 is connected with an external circuit through the centering support sheet 70, so that the conduction between the voice coil 22 and the external circuit can be realized through the conductive framework 60 and the centering support sheet 70, the structure is ingenious, and the conduction difficulty is reduced. In addition, in the process of conducting the voice coil 22 and the external circuit by the conductive framework 60 and the centering support 70, the magnetic circuit system 30 does not need to be interrupted for avoiding, the volume of the magnetic circuit system 30 is not limited, and the acoustic performance of the product is improved to the greatest extent.

As shown in fig. 3 to 6, the centering disk 70 of the present embodiment includes a fixing arm 73 and a vibrating arm 74, the fixing arm is surrounded outside the vibrating arm 74 and connected to the bottom of the housing 10, the vibrating arm 74 extends from the fixing arm 73 into the gap 50 and is connected to the conductive frame 60, the vibrating arm 74 is provided with an inner pad 71, the fixing arm 73 is provided with an outer pad 72, the inner pad 71 is connected to the second pad 62, and the outer pad 72 is connected to an external circuit. It is understood that the fixing arm 73 is installed at the bottom of the housing 10 without vibration, and the vibration arm 74 has elasticity, and the vibration arm 74 is connected to the conductive frame 60, and the vibration arm 74 vibrates in synchronization with the conductive frame 60. The conductive bobbin 60 and the damper 70 are electrically connected to the inner pad 71 through the second pad 62, and the outer pad 72 is connected to an external circuit, so that the voice coil 22 is electrically connected to the damper 70 through the conductive bobbin 60 and the external circuit.

Specifically, the vibrating arm 74 is in a strip shape, the vibrating arm 74 extends along the gap 50, the two ends of the vibrating arm 74 are a connection end 742 and a free end 743, respectively, the connection end 742 is connected with the fixed arm 73, the free end 743 is far away from the connection end 742, and the inner pad 71 is disposed near the free end 743. The bar-shaped vibrating arm 74 extends along the gap 50, and the free end 743 of the vibrating arm 74 is far away from the connecting end 742, so that the vibrating arm 74 has a large vibration amplitude. Because the internal pad 71 is connected with the second pad 62 of the conductive framework 60, the second pad 62 vibrates along with the vibration of the conductive framework 60, the internal pad 71 is arranged close to the free end 743, the internal pad 71 is convenient to be connected with the second pad 62, the vibration amplitude of the internal pad 71 arranged close to the free end 743 is large, the requirement of synchronous vibration with the second pad 62 can be met, and the influence on the vibration of the conductive framework 60 can be avoided.

In this embodiment, the speaker 100 includes a pair of opposing long sides 102 and a pair of opposing short sides 101, and the gap 50 includes two short lanes 51 corresponding to the two short sides 101; the fixed arm 73 has a rectangular ring-shaped structure, the short axis 731 of the fixed arm 73 is disposed corresponding to the short path 51, the vibrating arm 74 extends along the short path 51, and the connecting end 742 is connected to the short axis 731 side of the fixed arm 73. As shown in fig. 5, the gap 50 has two short paths 51, the two short paths 51 are respectively disposed corresponding to the two short sides 101 of the speaker 100, wherein the fixed arm 73 is located in a rectangular ring structure with matched outer shape of the speaker 100 and has two short axes 731 disposed oppositely, the short axis 731 of the fixed arm 73 is disposed corresponding to the short path 51 of the gap 50, the connecting end 742 of the vibrating arm 74 is connected to the side of the short axis 731 of the fixed arm 73 and extends along the short path 51, and the free end 743 of the vibrating arm 74 is far away from the connecting end 742 in the direction of the short axis 731.

Further, the vibrating arm 74 includes an extending portion 741 located between the connecting end 742 and the free end 743, the extending portion 741 is parallel to the short axis 731 of the fixed arm 73, the connecting end 742 is bent and extended to be connected with the fixed arm 73, and the free end 743 is bent and extended to be connected with the second pad 62, that is, two ends of the vibrating arm 74 are smoothly transitionally connected with the fixed arm 73, so that stress generated when the vibrating arm 74 vibrates can be dispersed, stress concentration can be prevented, deformation is not easy to occur, and product reliability is improved.

Further, the connection between one short axis 731 and two long axes 732 of the fixed arm 73 forms two corners 733, the connecting end 742 is connected to the fixed arm 73 near one of the corners 733, and the free end 743 is near the other corner 733. It can be understood that the vibrating arm 74 extends from one corner 733 of the fixed arm 73 to the other corner 733 along the short axis 731, so that the length of the vibrating arm 74 is maximized, and thus the amplitude of the vibrating arm 74 is maximized, and the acoustic performance of the product is improved to the maximum extent.

The centering branch piece 70 of the present embodiment is an integrated structure or a split structure; and/or, the centering chip 70 is FPCB, and the FPCB has the characteristics of high wiring density, light weight, small volume, few wiring errors, flexibility, elastically changeable shape, and the like, thereby satisfying the use requirement of the centering chip 70. As shown in fig. 3 and 6, the centering disk 70 has an integrated annular structure, which can save the assembly process, improve the assembly efficiency, and has high structural stability. The centering disk 70 may also be a split structure, and has the advantages of easy manufacture, material saving and flexible assembly.

The conductive framework 60 of the embodiment includes a top wall 64, a bottom wall 65 and a side wall 63 connected between the top wall 64 and the bottom wall 65, the top wall 64 is provided with a first pad 61, the bottom wall 65 or the side wall 63 is provided with a second pad 62, the top wall 64 is connected with the diaphragm 21, the bottom wall 65 and the side wall 63 are located in the gap, and the bottom wall 65 is connected with the elastic support member 40. Specifically, the top wall 64 of the conductive bobbin 60 is connected to the bottom of the diaphragm 21, and the first land 61 extends inward from the top wall 64 to facilitate connection with the voice coil wire 221 of the voice coil 22. The balance diaphragm 41 is attached to the bottom wall 65 of the conductive skeleton 60. In one embodiment, second pads 62 are disposed on bottom wall 65 of conductive frame 60, and second pads 62 extend outwardly from bottom wall 65 to facilitate connection with inner pads 71 on resonating arm 74. In another embodiment, the second pad 62 may be disposed on the sidewall 63 of the conductive frame 60 and attached to the outer side of the sidewall 63, so as to facilitate connection with the inner pad 71 of the vibrating arm 74 while improving the compactness of the structure.

As shown in fig. 7, in an embodiment, the conductive frame 60 is made of a metal material, and a first pad 61 and a second pad 62 are formed on portions of the conductive frame 60. The conductive framework 60 made of metal has good conductivity and heat dissipation effect, and the first bonding pad 61 and the second bonding pad 62 are formed by partial structures of the conductive framework 60, so that the structure is simple, the manufacturing is easy, and the conduction of the voice coil 22 and an external circuit is realized.

In another embodiment, the conductive frame 60 is made of a non-metallic material, the conductive layer 66 is laid on the surface of the conductive frame 60 or the conductive layer 66 is embedded inside the conductive frame 60, and the first pad 61 and the second pad 62 are formed on portions of the conductive layer 66. The conductive framework 60 is made of a non-metallic material, for example, the conductive framework 60 is a plastic product, in order to realize the conductivity of the conductive framework 60, a conductive layer 66 can be laid on the surface of the conductive framework 60, specifically, the conductive layer 66 can be formed on the surface of the conductive framework 60 by laser electroplating, brushing conductive silver paste or brushing conductive adhesive, the conductive layer 66 has conductivity, a first pad 61 and a second pad 62 are formed on the conductive layer 66, and further, the voice coil 22 is conducted with an external circuit. Alternatively, as shown in fig. 8, a conductive layer 66 may be formed by embedding a conductive material in the conductive bobbin 60, and the first pad 61 and the second pad 62 may be formed by a partial structure of the conductive layer 66, thereby realizing conduction between the voice coil 22 and an external circuit.

The speaker 100 of the present embodiment includes an opposing pair of long sides 102 and an opposing pair of short sides 101, and the gap 50 includes two short lanes 51 corresponding to the two short sides 101; the conductive skeleton 60 includes two pads disposed corresponding to the short streets 51, and the second pads 62 are disposed corresponding to the inner pads 71 and extend into the gap 50. As shown in fig. 3 to 6, the gap 50 has two short traces 51, the two short traces 51 are respectively disposed corresponding to the two short edges 101 of the speaker 100, the number of the conductive skeletons 60 is two, and the two conductive skeletons 60 are respectively disposed corresponding to the two short traces 51. The second pads 62 are disposed corresponding to the inner pads 71 and extend into the gap 50 to facilitate connection with the inner pads 71. It can be understood that, in the present embodiment of the damper 70, the number of the vibrating arms 74 is two, two vibrating arms 74 are respectively disposed corresponding to two short channels 51, and the extending directions of the two vibrating arms 74 are opposite, so as to improve the structural stability of the speaker 100.

In this embodiment, the number of the balance diaphragms 41 is two, and the two balance diaphragms 41 are respectively disposed corresponding to the two short channels 51. The balance diaphragm 41 includes a first connection portion 411, a first ring-folding portion 412 and a second connection portion 413, which are sequentially disposed, the first connection portion 411 is adhered to the bottom wall 65 or the centering sheet 70, the second connection portion 413 is adhered to the centering sheet 70, and the first ring-folding portion 412 is disposed corresponding to the gap 50.

The first connecting portion 411 of the balance diaphragm 41 of this embodiment is bonded to the bottom wall 65 of the conductive framework 60 or the centering sheet 70, and the second connecting portion 413 is bonded to the centering sheet 70, so as to fix the two sides of the balance diaphragm 41, thereby facilitating the vibration of the first folding ring portion 412, and the gap 50 provides a vibration space for the first folding ring portion 412. When the loudspeaker 100 works, the vibrating diaphragm 21, the conductive framework 60, the balance vibrating diaphragm 41 and the vibrating arm 74 of the centering disk 70 vibrate synchronously, the balance vibrating diaphragm 41 plays a role in assisting and strengthening the vibration of the vibrating diaphragm 21, the vibration performance of the vibration system 20 is effectively improved, and the acoustic performance of the product is further improved.

In this embodiment, the diaphragm 21 includes a central portion 211, a second flange portion 212 and a fixing portion 213, which are sequentially disposed from inside to outside, the top wall 64 is adhered to the central portion 211, the second flange portion 212 is disposed corresponding to the first flange portion 412, and the fixing portion 213 extends downward from the second flange portion 212 and is formed and fixed outside the housing 10. The central portion 211 of the present embodiment includes an inner ring portion 2111 formed by extending inward from an inner edge of the second flange portion 212 and a reinforcing portion (dome)2112 compounded on the inner ring portion 2111, and a top portion of the conductive skeleton 60 is bonded to the central portion 211, specifically, the conductive skeleton 60 is connected to both the inner ring portion 2111 and the reinforcing portion 2112. The diapire 65 of electrically conductive skeleton 60 bonds with the first connecting portion 411 of balanced vibrating diaphragm 41, the second connecting portion 413 of balanced vibrating diaphragm 41 bonds in centering branch piece 70, voice coil 22 is located the below of central part 211 and bonds with the top of electrically conductive skeleton 60, fixed part 213 is flange structure, from the outside downwardly extending of second flange portion 212 and fixing in the outside of shell 10, realize vibrating diaphragm 21, shell 10, voice coil 22, electrically conductive skeleton 60, centering branch piece 70 and the assembly between the balanced vibrating diaphragm 41. The voice coil 22 drives the diaphragm 21, the balance diaphragm 41, the conductive bobbin 60, and the vibration arm 74 of the centering leg 70 to vibrate synchronously. The first flange part 412 of the diaphragm 21 and the second flange part 212 of the balanced diaphragm 41 are correspondingly arranged, and the first flange part 412 and the second flange part 212 can form symmetrical support, so that symmetrical restoring force can be provided when the voice coil 22 vibrates, the distortion of a product is reduced, and the reliability is improved.

As shown in fig. 3, in the present embodiment, the side magnetic structure 33 is an annular structure, the side magnetic structure 33 of the annular structure surrounds the periphery of the central magnetic structure 32, and an annular magnetic gap 34 is formed between the side magnetic structure 33 and the central magnetic structure 32, matching with the shape of the voice coil 22, and improving the vibration stability of the voice coil 22.

Specifically, the central magnetic structure 32 includes a central magnet 321 and a central magnetic conductive plate 322 disposed above the central magnet 321, and the central magnetic conductive plate 322 can modify the magnetic force emitted from the central magnet 321. The magnetic structure 33 includes a ring-shaped edge magnet 331 and a ring-shaped edge magnetic plate 332 disposed above the ring-shaped edge magnet 331, wherein the ring-shaped edge magnetic plate 332 can modify the magnetic force generated by the ring-shaped edge magnet 331. The side magnetic conductive plate 332 and the casing 10 are integrally formed, or the side magnetic conductive plate 332 and the casing 10 are connected to each other in a split structure. As shown in fig. 3, the side magnetic plate 332 of the present embodiment and the casing 10 are integrally formed, so that the structure is compact, the assembling process and the assembling gap 50 are omitted, and the assembling error is avoided. In other embodiments, the side magnetic plate 332 and the casing 10 are connected to each other in a split structure, so that the manufacturing is convenient and the assembly manner is flexible.

Further, the casing 10 is a metal casing 10, and the edge magnetic plate 332 and/or the surface of the casing 10 are covered with an insulating material layer. The insulating material layer has insulating property, so that short circuit between the shell 10, the edge magnet 331, the conductive wire and the external pad 72 is prevented, and the use safety of the product is ensured.

The above is only the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all of which are in the utility model discloses a conceive, utilize the equivalent structure transform that the content of the specification and the attached drawings did, or directly/indirectly use all to include in other relevant technical fields the patent protection scope of the present invention.

Claims

1. A loudspeaker comprises a shell, a vibration system and a magnetic circuit system, wherein the vibration system comprises a vibrating diaphragm and a voice coil for driving the vibrating diaphragm to vibrate, and the magnetic circuit system comprises a magnetic yoke, a central magnetic circuit structure and a side magnetic circuit structure, wherein the central magnetic circuit structure and the side magnetic circuit structure are arranged above the magnetic yoke; it is characterized in that the preparation method is characterized in that,

the side magnetic circuit structure is an annular structure;

2. The loudspeaker of claim 1, wherein said centering disk includes a fixed arm and a vibrating arm, said fixed arm being disposed around said vibrating arm and connected to said bottom of said enclosure, said vibrating arm extending from said fixed arm into said gap and connected to said conductive frame, said vibrating arm having an inner bonding pad, said fixed arm having an outer bonding pad, said inner bonding pad being connected to said second bonding pad, said outer bonding pad being connected to an external circuit.

3. The speaker of claim 2, wherein said resonating arm is in the form of a bar, said resonating arm extending along said gap, said resonating arm having a link end and a free end at opposite ends, said link end being connected to said fixed arm, said free end being remote from said link end, said internal bonding pad being disposed proximate to said free end.

4. A loudspeaker according to claim 3, wherein the loudspeaker comprises an opposed pair of long sides and an opposed pair of short sides, the gap comprising two short traces corresponding to the two short sides; the fixed arm is rectangle annular structure, the minor axis of fixed arm with the short road corresponds the setting, the vibration arm is followed the short road extends, just the link with the minor axis side of fixed arm is connected.

5. The speaker of claim 4, wherein said resonating arm includes an extension portion between said attachment end and said free end, said extension portion being disposed parallel to the minor axis side of said stationary arm, said attachment end bent extension being connected to said stationary arm, said free end bent extension being connected to said second land.

6. The loudspeaker in accordance with claim 4 wherein said stationary arm has a connection between one of said minor axes and two major axes forming two corners, said connection end being connected to said stationary arm adjacent one of said corners and said free end being adjacent the other of said corners.

7. The loudspeaker of claim 2, wherein the centralizer is of one-piece or split construction.

8. The loudspeaker of claim 2, wherein the conductive frame is a metal material, and portions of the conductive frame form the first and second pads; alternatively, the first and second electrodes may be,

9. The speaker of claim 8, wherein the speaker includes an opposing pair of long sides and an opposing pair of short sides, the gap including two short lanes corresponding to the two short sides;

10. The loudspeaker according to claim 9, wherein the number of the balance diaphragms is two, the balance diaphragms include a first connecting portion, a first folding ring portion and a second connecting portion, the first connecting portion is bonded to the bottom wall or the centering sheet, the second connecting portion is bonded to the centering sheet, and the first folding ring portion is disposed corresponding to the gap.

11. The speaker of claim 10, wherein the diaphragm includes a central portion, a second flange portion and a fixing portion, the central portion, the second flange portion and the fixing portion are sequentially disposed from inside to outside, the top wall is bonded to the central portion, the second flange portion is disposed corresponding to the first flange portion, and the fixing portion extends downward from the second flange portion and is fixed to an outer side of the housing.

12. The loudspeaker of any one of claims 1-11,

the side magnetic circuit structure comprises an annular side magnet and an annular side magnetic conduction plate arranged above the annular side magnet, wherein the side magnetic conduction plate and the shell are of an integrally formed structure, or the side magnetic conduction plate and the shell are of a split structure connected with each other.