CN114697827B

CN114697827B - Speaker and terminal device

Info

Publication number: CN114697827B
Application number: CN202011612749.3A
Authority: CN
Inventors: 刘金华; 黎椿键; 朱统; 闫涛; 郭李
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2023-06-13
Anticipated expiration: 2040-12-30
Also published as: CN114697827A; WO2022143235A1

Abstract

The utility model provides a speaker, including the basin frame, magnetic circuit subassembly and vibration subassembly locate on the basin frame, vibration subassembly includes voice coil loudspeaker voice coil and flexible circuit board, the voice coil loudspeaker voice coil is located in the basin frame, flexible circuit board includes vibrating portion, fixed part and the portion of bending of connecting vibrating portion and fixed part, vibrating portion and voice coil loudspeaker voice coil are connected, fixed part is connected with the basin frame, be equipped with two first bonding pads that are used for being connected with the voice coil loudspeaker voice coil electricity on the vibrating portion, be equipped with two second bonding pads that are used for being connected with the basin frame on the fixed part, be equipped with two circuits of electrically connecting first bonding pad and second bonding pad on the portion of bending, only there is a portion of bending in the flexible circuit board, and two circuits extend side by side in the portion of bending. Through design two double-circuit line structures side by side on flexible circuit board for positive negative pole accessible portion of bending draws forth the basin frame, makes the basin frame reduce to speaker overall dimension's influence, makes magnetic circuit assembly's volume obtain increasing, thereby promotes the play ability of speaker, obtains better audio.

Description

Speaker and terminal device

Technical Field

The present application relates to the field of audio devices, and in particular, to a speaker and a terminal device.

Background

Along with the development of technology and the progress of communication technology, mobile multimedia technology is also developed, the use rate of devices related to audio functions is higher and higher, and many audio related devices have multiple entertainment functions, such as video playing, digital video, games, GPS navigation and the like, so that the audio devices are required to have good audio playing performance and more compact space structures. The requirements of the audio function related devices are not limited to video or audio playing, and the miniaturization, portability, sound quality and the like of the audio related devices are more highly demanded.

In audio related devices, it is often necessary to equip miniature electroacoustic transducers for the playback of audio signals, wherein the most commonly employed miniature electroacoustic transducers are moving-coil miniature loudspeakers. In order to ensure the vibration balance of the loudspeaker under large amplitude, an auxiliary vibrating diaphragm system positioned at the bottom of the voice coil needs to be designed. In order to ensure that the power-on circuit inside the loudspeaker is not broken due to vibration fatigue under large amplitude, the power-on circuit inside the loudspeaker is generally designed into a flexible circuit board (FPC) structure, so that the copper layer is thinner, the stress is smaller, and the breakage caused by stress concentration is avoided. The flexible circuit board needs to be conducted with the voice coil at the inner side of the loudspeaker and needs to be conducted with the basin frame at the outer side of the loudspeaker, so that the pad structures are required to be designed at the inner side and the outer side of the flexible circuit board. In the prior art, 4 FPCs are usually required to be designed, wherein 2 FPCs are used as power-on lines, and the other 2 FPCs are used as structural symmetry simulation to ensure that the vibration system is of an axially symmetrical structure, so that the compliance and the quality system of the FPCs in the vibration process are relatively balanced. Since the flexible circuit board is usually disposed at the corner of the speaker, it is generally necessary to connect the outer pads of 2 flexible circuit boards as power-on lines at two corners through the circuit board on the frame, and then draw out the 2 flexible circuit boards through one corner to connect with external devices. The circuit board on the basin frame connected with the two corners occupies a certain space, the size of the loudspeaker in the length direction is limited, the area of the magnetic circuit is limited, the driving capability of the loudspeaker is reduced, and the outward playing effect is poor.

Disclosure of Invention

In view of the above, it is necessary to provide a speaker and a terminal device that facilitate improvement of the playback effect.

According to a first aspect of the embodiment, a loudspeaker is provided, the loudspeaker comprises a frame, a magnetic circuit assembly and a vibration assembly, the magnetic circuit assembly and the vibration assembly are all arranged on the frame, the vibration assembly comprises a voice coil and a flexible circuit board, the voice coil is arranged in the frame, the flexible circuit board comprises a vibration part, a fixing part and a bending part, the vibration part is connected with the voice coil, the fixing part is connected with the frame, the bending part is connected with the fixing part, two first bonding pads are arranged on the vibration part, two second bonding pads are arranged on the fixing part correspondingly, two circuits for electrically connecting the first bonding pads with the second bonding pads are arranged on the bending part, the first bonding pads are used for electrically connecting the voice coil, the second bonding pads are used for being connected with the frame, one flexible circuit board is only provided with one bending part, and the two circuits extend side by side in the bending part.

The loudspeaker is characterized in that two parallel double-channel circuit structures are designed on the flexible circuit board, so that the basin frame is led out through the two first bonding pads of the vibration part of the flexible circuit board, when the basin frame is communicated with the flexible circuit board, the two corner parts of the basin frame are not required to be connected, and only positive and negative circuits are led out from one corner part, so that the influence of the basin frame on the outline dimension of the loudspeaker is reduced, the size of the basin frame can be increased, the area and the volume of the magnetic circuit assembly are increased, the magnetic induction intensity B is increased, the electric power transduction coefficient of the loudspeaker is improved, the external discharge capacity of the loudspeaker is increased, and better sound effect is obtained.

One possible design of the first aspect, the basin frame includes a top wall, a bottom wall opposite to the top wall, and a side wall connecting the top wall and the bottom wall, wherein a containing cavity is enclosed between the side walls, and the voice coil is arranged in the containing cavity.

One possible design of the first aspect, the magnetic circuit assembly includes a central magnet, a side magnet, a central pole piece, a side pole piece and a lower pole piece, the central magnet is arranged in the accommodating cavity, the side magnet is arranged on one side of the central magnet, a gap exists between the side magnet and the central magnet, the voice coil is sleeved outside the central magnet, the voice coil is arranged in the gap, the central pole piece is attached to one side of the central magnet facing the top wall, the side pole piece is arranged on the side wall and is positioned on one side of the side magnet facing the top wall, and the lower pole piece is arranged on one side of the central magnet and the side magnet, which is close to the bottom wall.

In one possible design of the first aspect, the number of the side magnets is two, and the center magnets are symmetrically arranged on two sides of the center magnet. The two side magnets arranged in the center symmetry way can improve the structural stability of the loudspeaker and strengthen the magnetic field of the loudspeaker.

One possible design of the first aspect, the side wall is further provided with a mounting block, a limit block is arranged on one surface of the side wall, which is away from the side wall, the limit block is arranged on one side of the mounting block, which is close to the top wall, the edge pole piece is arranged on the side wall through the mounting block, and the edge pole piece is limited on one side of the limit block, which is away from the top wall, by the limit block. The limiting block can limit the position of the edge pole piece in the basin frame.

One possible design of the first aspect, the vibration assembly further includes a diaphragm and a secondary diaphragm, the inner periphery of the diaphragm is connected with the voice coil, the outer periphery of the diaphragm is connected with the top wall, the secondary diaphragm is arranged on one surface of the voice coil away from the diaphragm, one side of the secondary diaphragm is connected with the voice coil, the other side of the secondary diaphragm is connected with the edge pole piece, and the flexible circuit board is located between the secondary diaphragm and the diaphragm. The design of auxiliary vibrating diaphragm can guarantee the balance of vibration, reduces and sways to prevent that the voice coil loudspeaker voice coil from rolling the phenomenon of vibrating.

In one possible design of the first aspect, the voice coil includes a top surface near the top wall, a bottom surface near the bottom wall, and a lead for connection with the flexible circuit board, the lead being connected with the first pad. Connection between the voice coil and the flexible circuit board can be improved through connection of the lead wire and the first bonding pad, and connection faults are effectively avoided.

One possible design of the first aspect, the diaphragm includes a first connection portion, a second connection portion, and a sounding portion, where the first connection portion is connected with the top surface, the second connection portion is connected with the top wall, and the sounding portion connects the first connection portion with the second connection portion.

In one possible design of the first aspect, the vibration assembly further includes a dome, and the dome is attached to the first connection portion. The design of the dome is beneficial to improving the tone quality of the loudspeaker.

In one possible design of the first aspect, the voice coil further includes a gasket, the gasket is disposed on the top surface, and the first connection portion is connected to a side of the gasket away from the top surface. The arrangement of the gasket can prevent the vibrating diaphragm from interfering with the flexible circuit board during vibration.

In one possible design of the first aspect, a stop is disposed on a side of the gasket adjacent to the top surface, and the vibration portion is attached to a side of the stop adjacent to the top surface. The baffle between vibrating diaphragm and the flexible circuit board is further increased in the setting of dog, prevents that vibrating diaphragm and flexible circuit board from taking place to interfere when vibrating.

One possible design of the first aspect, the secondary diaphragm includes a third connecting portion, a fourth connecting portion and a balancing portion, where the third connecting portion is connected with the bottom surface, the fourth connecting portion is connected with the edge pole piece, and the balancing portion connects the third connecting portion with the fourth connecting portion.

One possible design of the first aspect, the vibration assembly includes two flexible circuit boards and the secondary diaphragm which are arranged in a central symmetry manner. The two flexible circuit boards arranged in a central symmetry way and the auxiliary vibrating diaphragm can improve the structural stability of the loudspeaker.

One possible design of the first aspect, the edge pole piece is provided with an avoidance groove, the first bonding pad is located on the avoidance groove, the balance part of the auxiliary vibrating diaphragm is located in the avoidance groove, and the fourth connecting part is connected with one side, close to the avoidance groove, of the edge pole piece. The design of dodging the groove can prevent interference between the side pole piece and the auxiliary vibrating diaphragm during vibration.

One possible design of the first aspect, the two first bonding pads are located at two sides of the circuit and are respectively electrically connected with the leads of the voice coil, two third bonding pads are disposed at one side of the mounting block, which faces the top wall, and the second bonding pads are respectively electrically connected with the third bonding pads.

In one possible design of the first aspect, an internal circuit is further provided in the basin frame, one side of the internal circuit is connected with the third bonding pad, and the other side extends towards one side of the bottom wall. The design of the internal circuitry facilitates electrical connection of the flexible circuit board to external circuitry.

One possible design of the first aspect, the basin frame further comprises a cover plate covering the accommodating cavity, the cover plate is arranged on the top wall, the side wall extends to a side far away from the accommodating cavity to form a sound outlet, a sound outlet is arranged on one side, close to the top wall, of the sound outlet, and a sound outlet groove is formed in the cover plate. The cover plate is matched with the sound outlet part, so that sound emitted by the loudspeaker is transmitted outwards through the sound outlet and the sound outlet groove.

One possible design of the first aspect, the side of the top wall away from the accommodating cavity extends away from the bottom wall to form an installation part, an installation cavity is defined between the installation part and the top wall, and the cover plate is arranged in the installation cavity.

In a second aspect of embodiments of the present application, there is provided a terminal device provided with the speaker of the first aspect and any one of the possible designs.

Drawings

Fig. 1 is a schematic structural diagram of a speaker according to an embodiment of the present application.

Fig. 2 is a partially exploded perspective view of the speaker of fig. 1.

Fig. 3 is a schematic perspective view of the speaker of fig. 2 at another angle.

Fig. 4 is a cross-sectional view of the speaker shown in fig. 1 along IV-IV.

Fig. 5 is a perspective view of the speaker of fig. 1 with the cover plate, diaphragm and dome removed.

Description of the main reference signs

Loudspeaker 100

Basin stand 10

Top wall 11

Bottom wall 12

Mounting portion 121

Side wall 13

Long side wall 131

Short side wall 132

Mounting block 133

Third pad 1331

Limiting block 134

Accommodation chamber 14

Cover plate 15

Sound outlet groove 151

Sound emitting unit 16

Sound outlet 161

Mounting portion 17

Installation cavity 18

Internal wiring 19

Magnetic circuit assembly 20

Center magnet 21

Side magnet 22

Avoidance portion

221, 251

Center pole piece 23

Edge pole piece 24

Dodge groove 241

Lower pole piece 25

Vibration assembly 30

Voice coil 31

Top surface 311

Bottom surface 312

Gasket 313

Stop 3131

Diaphragm 32

First connecting portion 321

Second connecting portion 322

Sounding portion 323

Ball top 33

Auxiliary diaphragm 34

Third connecting portion 341

Fourth connecting portion 342

Balance portion 343

Flexible circuit board 35

Vibration part 351

First bonding pad 3511

Fixing portion 352

Second bonding pad 3521

Bending portion 353

The following detailed description will further illustrate the application in conjunction with the above-described figures.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

Hereinafter, the terms "first," "second," and the like, if used, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more. The terms of orientation such as "upper", "lower", "left", "right", etc. are defined with respect to the orientation of the components shown in the drawings as they are schematically disposed, and it should be understood that these directional terms are relative terms that are used for descriptive and clarity with respect to each other and that may be varied accordingly with respect to the orientation of the components shown in the drawings.

In the present application, the term "coupled" should be interpreted broadly, unless explicitly stated or defined otherwise, as such, as the term "coupled" may be fixedly coupled, detachably coupled, or as a single piece; can be directly connected or indirectly connected through an intermediate medium. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In the following detailed description of the embodiments in conjunction with the drawings, which are not to scale in general, the drawings illustrating the partial structure of the device are not to scale and are merely examples, which should not limit the scope of the present application.

As shown in fig. 1, a loudspeaker 100 according to a first embodiment of the present application is provided. The speaker 100 may be provided in an electronic device by encapsulation or integration.

As shown in fig. 2, the speaker 100 includes a frame 10, a magnetic circuit assembly 20, and a vibration assembly 30. The tub 10 is a supporting assembly for supporting and protecting various components inside the speaker 100, and can mount and fix the speaker 100 to an electronic device. The magnetic circuit assembly 20 and the vibration assembly 30 are all arranged on the basin stand 10. The magnetic circuit assembly 20 is configured to provide a fixed magnetic field to drive the vibration assembly 30 to vibrate. The vibration assembly 30 is used to excite a variable magnetic field by an electric current to act with a fixed magnetic field to generate vibration to sound.

Referring to fig. 3, the basin stand 10 includes a top wall 11, a bottom wall 12 opposite to the top wall 11, and a side wall 13 connecting the top wall 11 and the bottom wall 12. The side walls 13 are connected end to end, and a containing cavity 14 is defined between the side walls 13.

The basin stand 10 further comprises a cover plate 15 covering the accommodating cavity 14. The cover plate 15 is provided on the top wall 11. The side wall 13 further extends to a side far away from the accommodating cavity 14 to form a sound outlet 16. The sound outlet portion 16 is provided with a sound outlet 161 at a side close to the top wall 11. The cover 15 is provided with a sound outlet groove 151 toward the sound outlet 161. The cover 15 cooperates with the sound outlet 16 to allow sound emitted from the speaker 100 to propagate outwardly through the sound outlet 161 and the sound outlet groove 151.

The top wall 11 extends away from the accommodating chamber 14 to a direction away from the bottom wall 12 to form a mounting portion 17. The mounting portion 17 and the top wall 11 define a mounting cavity 18 therebetween. The cover plate 15 is disposed in the mounting cavity 18.

In some embodiments, the basin stand 10 is a generally rectangular frame structure, and the side walls 13 are formed of two opposing long side walls 131 and two opposing short side walls 132.

The magnetic circuit assembly 20 includes a center magnet 21, side magnets 22, a center pole piece 23, side pole pieces 24, and a lower pole piece 25. The center magnet 21 is disposed in the accommodating chamber 14. The number of the side magnets 22 is two, and the center of the side magnets is symmetrically arranged at two sides of the center magnet 21. A gap exists between the side magnet 22 and the center magnet 21. The central pole piece 23 corresponds to the shape of the central magnet 21, and the central pole piece 23 is attached to one surface of the central magnet 21 facing the top wall 11. The side pole piece 24 is disposed on the side wall 13 and on a surface of the side magnet 22 facing the top wall 11, and the two side magnets 22 are respectively attached to the side pole piece 24. The lower pole piece 25 is disposed on a surface of the center magnet 21 and the side magnet 22 near the bottom wall 12. The center magnet 21 and the side magnet 22 are used for generating a fixed magnetic field, and the center pole piece 23, the side pole piece 24 and the lower pole piece 25 are used for magnetic conduction, so that N poles and S poles of the center magnet 21 and the side magnet 22 are concentrated into a gap between the center magnet 21 and the side magnet 22 through a loop, and a stronger magnetic field is generated in the gap.

In some embodiments, the cross section of the center magnet 21 is substantially rectangular. The side magnet 22 has a substantially L-shape, and the side pole piece 24 has a substantially hollow plate shape.

The side wall 13 is also provided with a mounting block 133. The mounting block 133 is used to limit the installation position of the edge piece 24. The side of the mounting block 133 facing away from the side wall 13 is provided with a limiting block 134. The limiting block 134 is disposed on a side of the mounting block 133 near the top wall 11, and the limiting block 134 is used for limiting the setting height of the edge pole piece 24. The side pole piece 24 is disposed on the side wall 13 through the mounting block 133, and is limited by the limiting block 134 on a side of the limiting block 134 away from the top wall 11.

In some embodiments, the center pole piece 23, the side pole piece 24 and the lower pole piece 25 are iron pieces, but not limited thereto, and the center pole piece 23, the side pole piece 24 and the lower pole piece 25 may be made of magnetic conductive materials such as silicon steel.

Referring to fig. 4, the vibration assembly 30 includes a voice coil 31, a diaphragm 32, a dome 33, a sub-diaphragm 34, and a flexible circuit board 35. The voice coil 31 is sleeved outside the center magnet 21. The voice coil 31 is disposed in the accommodating chamber 14 and is disposed in a gap formed between the center magnet 21 and the side magnet 22. The voice coil 31 is configured to receive an electrical signal (alternating audio current) to be forced to move in a fixed magnetic field formed by the magnetic circuit assembly 20. The diaphragm 32 has inner circumferences connected to the voice coil 31 and outer circumferences connected to the top wall 11, respectively. The diaphragm 32 is configured to vibrate with the movement of the voice coil 31 to push air to make a sound. The dome 33 is attached to the inner periphery of the diaphragm 32. The secondary diaphragm 34 is disposed on a surface of the voice coil 31 away from the diaphragm 32, one side of the secondary diaphragm 34 is connected with the voice coil 31, and the other side is connected with the edge pole piece 24. The secondary diaphragm 34 is used for guaranteeing the balance of vibration and reducing the swing when the amplitudes of the voice coil 31 and the diaphragm 32 are large, so as to prevent the voice coil 31 from rolling. The flexible circuit board 35 connects the frame 10 and the voice coil 31, and is located between the sub-diaphragm 34 and the diaphragm 32. One side of the flexible circuit board 35 is connected to the voice coil 31, and the other side is connected to the bottom wall 12. The flexible circuit board 35 is used to provide an electrical signal to the voice coil 31 to control the movement of the voice coil 31.

In some embodiments, the voice coil 31 has a ring structure, the diaphragm 32 has a substantially ring shape, and the dome 33 has a substantially rectangular shape.

The voice coil 31 includes a top surface 311 near the top wall 11 and a bottom surface 312 near the bottom wall 12.

The diaphragm 32 includes a first connecting portion 321, a second connecting portion 322, and a sound generating portion 323. The first connection portion 321 is connected to the top surface 311 and is movable with the movement of the voice coil 31. The second connecting portion 322 is connected to the top wall 11. The sound emitting unit 323 connects the first connecting unit 321 and the second connecting unit 322. The sound emitting part 323 has a substantially hemispherical cross section. The dome 33 is attached to the first connecting portion 321 of the diaphragm 32.

The material of the diaphragm 32 is an elastic material, such as one of paper, animal fiber, bulletproof cloth, PP (Polypropylene), polyimide (PI), polyetheretherketone (Poly Ether Ether Ketone, PEEK), polyethylene naphthalate (Polyethylene Naphthalate, PEN), polyetherimide (PEI), polyurethane (PU), thermoplastic elastomer (Thermoplastic Elastomer, TPE), thermoplastic polyester elastomer (TPEE), silicone gel or rubber material, and air-permeable mesh cloth.

The vibration assembly 30 includes two of the secondary diaphragms 34 that are centrosymmetric. The secondary diaphragm 34 includes a third connecting portion 341, a fourth connecting portion 342, and a balancing portion 343. The third connection portion 341 is connected to the bottom surface 312. The fourth connecting portion 342 is connected to a side of the edge piece 24 facing away from the mounting block 133. The balance part 343 connects the third connection part 341 and the fourth connection part 342. The balance portion 343 has a substantially hemispherical cross section and has a convex direction opposite to that of the sound emitting portion 323.

In some embodiments, the secondary diaphragm 34 is generally elongated and sheet-like with a central portion that is convex toward one side.

The secondary diaphragm 34 is made of the same material as the diaphragm 32, and it is understood that the material used for the secondary diaphragm 34 may be different from the material used for the diaphragm 32.

The flexible circuit board 35 includes a vibrating portion 351, a fixing portion 352, and a bending portion 353. The vibration part 351 is connected to the top surface 311 of the voice coil 31 and is movable with the movement of the voice coil 31. The fixing portion 352 is connected to the mounting block 133, and is used for fixing the flexible circuit board 35. The bending portion 353 connects the vibration portion 351 and the fixing portion 352. The bending portion 353 has a certain elasticity.

Specifically, referring to fig. 5, the voice coil 31 further includes a gasket 313. The gasket 313 is matched with the shape of the top surface 311 of the voice coil, and the gasket 313 is provided on the top surface 311 of the voice coil 31. The first connection portion 321 is connected to a side of the gasket 313 remote from the top surface 311. The vibration assembly 30 includes two flexible circuit boards 35 arranged in a central symmetry manner, the two flexible circuit boards 35 have the same structure, and the vibration parts 351 of the two flexible circuit boards 35 are respectively located at one corner of the voice coil 31. Wherein, at least two first bonding pads 3511 are disposed on the vibration portion 351 of the flexible circuit board 35, two second bonding pads 3521 are disposed on the corresponding fixing portion 352, and two wires (not shown) electrically connecting the first bonding pads 3511 and the second bonding pads 3521 are disposed on the corresponding bending portion 353. The first bonding pad 3511 is used for electrically connecting with the voice coil 31, and the second bonding pad 3521 is used for connecting with the frame 10, so that external electrical signals are transmitted to the voice coil 31 through the frame 10 and the flexible circuit board 35. Only one bending portion 353 exists in one flexible circuit board 35, and two wires connecting the first bonding pad 3511 and the second bonding pad 3521 extend side by side in the bending portion 353, so that the two wires are simultaneously forced to move during sounding, and falling off is prevented. The two first pads 3511 are located at two sides of the circuit, and are electrically connected to leads (not shown) of the voice coil 31 respectively through soldering. The mounting block 133 at one corner of the basin frame 10 is provided with two third pads 1331 on a side facing the top wall 11. The second pads 3521 are electrically connected to the third pads 1331 by soldering, respectively.

The gasket 313 is provided with a stopper 3131 at a side near the top surface 311, and the vibration part 351 is attached to the stopper 3131 at a side near the top surface 311 and is connected to the voice coil 31 through the first pad 3511. The stopper 3131 serves to restrict a position where the vibration part 351 is provided, so as to prevent interference from occurring at the time of vibration due to the proximity of the flexible circuit board 35 to the diaphragm 32.

An internal circuit 19 is also arranged in the basin stand 10. The internal wiring 19 has one side connected to the third pad 1331 and the other side extending toward the bottom wall 12 to connect the flexible circuit board 35 electrically connected to the third pad 1331 to an external circuit.

The internal wire 19 is formed in the tub 10 by injection molding, but not limited thereto, and the internal wire 19 may be installed in the tub 10 through a hole provided in the tub 10.

Two centrosymmetric flexible circuit boards 35 are located on the short side wall 132, two centrosymmetric corners of the edge pole piece 24, which are opposite to the basin frame 10, are provided with avoiding grooves 241, and a first bonding pad 3511 is located at the corner of each avoiding groove 241, a balancing part 343 of the secondary vibrating diaphragm 34 is located in each avoiding groove 241, and a fourth connecting part 342 is connected with one side of the edge pole piece 24, which is close to each avoiding groove 241. The two side magnets 22 are disposed on the other two corners of the side pole piece 24, the long sides of the two L-shaped side magnets 22 are attached to the side pole piece 24 connected to the long side wall 131, and the short sides of the two L-shaped side magnets are away from the first bonding pad 3511 and the auxiliary diaphragm 34.

The two corners of the bottom wall 12 are further provided with mounting portions 121 protruding outwards, and the side magnets 22 and the lower pole piece 25 are provided with avoiding

portions

221 and 251 at corresponding positions to avoid the mounting portions 121.

The vibration part 351 is matched with the shape of the gasket 313 of the voice coil 31, and is adhered to the gasket 313 by means of adhesion, and the top surface 311 of the voice coil 31 is adhered to the gasket 313, so that when the voice coil 31 moves, the vibration part 351 and the voice coil 31 do not move relatively, and the welding point between the first welding pad 3511 and the lead is prevented from falling off. The fixing portion 352 corresponds to the shape of the mounting block 133 facing the top wall 11, and is provided on the mounting block 133 by bonding, so that the fixing portion 352 is stably connected to the tub 10.

Since the magnetic induction intensity generated by the magnetic circuit assembly 20 when the voice coil 31 is inserted into the magnetic gap of the magnetic circuit assembly 20 is B, the coil length L corresponding to the voice coil 31, when the voice coil 31 is applied with a voltage and generates a current i, the driving force that can be generated is F, where f=bli, where BL is called an electric power transduction coefficient.

According to the loudspeaker 100, two parallel double-channel circuit structures are designed on the flexible circuit board 35, so that positive and negative electrodes can be led out to one corner of the basin frame 10 through the two first bonding pads 3511 of the vibration part 351 of the flexible circuit board 35 and the internal circuit 19 in the basin frame 10, when the basin frame 10 is communicated with the flexible circuit board 35, two corners of the basin frame 10 are not required to be connected, positive and negative circuits are only required to be led out from one corner, the influence of the internal circuit 19 in the basin frame 10 on the external dimension of the loudspeaker 100 is reduced, the dimension of the basin frame 10 can be increased, the magnetic induction area and the volume of the magnetic circuit assembly 20 are increased, the magnetic induction intensity B is increased, the electric power transduction coefficient of the loudspeaker 100 is improved, the external discharging capacity of the loudspeaker 100 can be increased, and better sound effects are obtained.

The present application is not limited to the flexible circuit board 35 and the sub-diaphragm 34 of the center-symmetrical design. It will be appreciated that in other embodiments, four flexible circuit boards 35 may be provided and each connected to one corner of the voice coil 31. Wherein, at least one flexible circuit board 35 is provided with two parallel circuits, and the voice coil 31 is in circuit communication with one corner of the frame 10 through two corresponding first bonding pads 3511 and second bonding pads 3521. Four secondary diaphragms 34 are correspondingly arranged on four corners of the basin stand 10, and four side magnets 22 are correspondingly arranged on the magnetic circuit assembly 20.

In the illustrated embodiment, the shape of the speaker 100 is rectangular, so that it is described, but it should be understood that the shape of the speaker 100 may be a regular shape or an irregular shape such as a sphere, a cylinder, a cube, etc., and the shape may be freely selected according to the application scenario of the speaker 100, and the frame 10, the magnetic circuit assembly 20, and the vibration assembly 30 included in the speaker 100 may be adjusted accordingly according to the shape of the speaker 100.

The present application also proposes a terminal device provided with the above speaker 100.

The terminal device can be electronic equipment with a communication function, such as a telephone, a mobile phone, a notebook computer, a tablet personal computer, a Bluetooth sound device, an intelligent voice terminal, a palm game machine or an intelligent watch.

The foregoing is merely a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered in the scope of the disclosure of the present application.

Claims

1. The utility model provides a speaker, includes basin frame, magnetic circuit subassembly and vibration subassembly, the magnetic circuit subassembly reaches vibration subassembly all locates on the basin frame, its characterized in that:

the vibration assembly comprises a voice coil and a flexible circuit board, wherein the voice coil is arranged in a basin frame, the flexible circuit board comprises a vibration part, a fixing part and a bending part, the vibration part is connected with the voice coil, the fixing part is connected with the basin frame, the bending part is connected with the vibration part and the fixing part, two first bonding pads are arranged on the vibration part, two second bonding pads are arranged on the fixing part correspondingly, two circuits which are electrically connected with the first bonding pads and the second bonding pads are arranged on the bending part correspondingly, the first bonding pads are electrically connected with the voice coil, the second bonding pads are connected with the basin frame, one flexible circuit board is provided with only one bending part, the two circuits extend side by side in the bending part, one corner part of the basin frame is provided with two third bonding pads, one of the third bonding pads is electrically connected with one of the second bonding pads, and the other third bonding pad is electrically connected with the other second bonding pad.

2. The loudspeaker of claim 1, wherein the frame includes a top wall, a bottom wall disposed opposite the top wall, and side walls connecting the top wall and the bottom wall, wherein a receiving cavity is defined between the side walls, and the voice coil is disposed in the receiving cavity.

3. The loudspeaker of claim 2, wherein the magnetic circuit assembly comprises a center magnet, a side magnet, a center pole piece, a side pole piece and a lower pole piece, wherein the center magnet is arranged in the accommodating cavity, the side magnet is arranged on one side of the center magnet, a gap exists between the side magnet and the center magnet, the voice coil is sleeved outside the center magnet, the voice coil is arranged in the gap, the center pole piece is attached to one side of the center magnet, which is oriented towards the top wall, the side pole piece is arranged on the side wall and is positioned on one side of the side magnet, which is oriented towards the top wall, and the lower pole piece is arranged on one side of the center magnet and the side magnet, which is close to the bottom wall.

4. A loudspeaker according to claim 3, wherein the number of side magnets is two and the centers of the side magnets are symmetrically arranged on both sides of the center magnet.

5. A loudspeaker according to claim 3, wherein the side wall is further provided with a mounting block, a stopper is provided on a side of the mounting block facing away from the side wall, the stopper is provided on a side of the mounting block adjacent to the top wall, the side piece is provided on the side wall through the mounting block, and the side piece is limited by the stopper on a side of the stopper facing away from the top wall.

6. The loudspeaker of claim 3, wherein the vibration assembly further comprises a diaphragm and a secondary diaphragm, the inner periphery of the diaphragm is connected with the voice coil, the outer periphery of the diaphragm is connected with the top wall, the secondary diaphragm is arranged on one surface of the voice coil away from the diaphragm, one side of the secondary diaphragm is connected with the voice coil, the other side of the secondary diaphragm is connected with the edge pole piece, and the flexible circuit board is arranged between the secondary diaphragm and the diaphragm.

7. The loudspeaker of claim 6 wherein the voice coil includes a top surface adjacent to the top wall, a bottom surface adjacent to the bottom wall, and leads for connection to the flexible circuit board, the leads being connected to the first pads.

8. The loudspeaker of claim 7, wherein the diaphragm includes a first connecting portion, a second connecting portion, and a sound producing portion, the first connecting portion being connected to the top surface, the second connecting portion being connected to the top wall, the sound producing portion connecting the first connecting portion and the second connecting portion.

9. The loudspeaker of claim 8, wherein the vibration assembly further comprises a dome attached to the first connection portion.

10. The loudspeaker of claim 8, wherein the voice coil further comprises a gasket disposed on the top surface, the first connection portion being connected to a side of the gasket remote from the top surface.

11. The loudspeaker of claim 10, wherein the gasket is provided with a stopper on a side thereof adjacent to the top surface, and the vibration portion is attached to the stopper on a side thereof adjacent to the top surface.

12. The loudspeaker of claim 7, wherein the secondary diaphragm includes a third connecting portion, a fourth connecting portion, and a balancing portion, the third connecting portion being connected to the bottom surface, the fourth connecting portion being connected to the side pole piece, the balancing portion connecting the third connecting portion and the fourth connecting portion.

13. The loudspeaker of claim 12, wherein the vibration assembly comprises two flexible circuit boards and the secondary diaphragm arranged centrally symmetrically.

14. The loudspeaker of claim 12, wherein the edge pole piece is provided with an avoidance groove, the first bonding pad is positioned on the avoidance groove, the balance part of the auxiliary vibrating diaphragm is positioned in the avoidance groove, and the fourth connecting part is connected with one side of the edge pole piece, which is close to the avoidance groove.

15. The loudspeaker of claim 5, wherein the two first pads are located at two sides of the circuit and are respectively electrically connected with leads of the voice coil, the third pad is located at one side of the mounting block facing the top wall, and the second pads are respectively electrically connected with the third pad.

16. The loudspeaker of claim 15 wherein an internal circuit is further provided in the frame, the internal circuit having one side connected to the third pad and another side extending toward the bottom wall side.

17. The loudspeaker of claim 2, wherein the basin stand further comprises a cover plate covering the accommodating cavity, the cover plate is arranged on the top wall, the side wall further extends to a side far away from the accommodating cavity to form a sound outlet, a sound outlet is arranged on a side, close to the top wall, of the sound outlet, and a sound outlet groove is formed in the cover plate towards the sound outlet.

18. The loudspeaker of claim 17, wherein a side of the top wall away from the receiving cavity extends away from the bottom wall to form a mounting portion, the mounting portion and the top wall defining a mounting cavity therebetween, the cover plate being disposed in the mounting cavity.

19. A terminal device, characterized in that the terminal device is provided with a loudspeaker according to any one of claims 1-18.