CN114697827A

CN114697827A - Speaker and terminal device

Info

Publication number: CN114697827A
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: 2022-07-01
Anticipated expiration: 2040-12-30
Also published as: WO2022143235A1; CN114697827B

Abstract

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

Description

Speaker and terminal device

Technical Field

The application relates to the field of audio equipment, in particular to a loudspeaker and a terminal device.

Background

With the development of science and technology and the progress of communication technology, the mobile multimedia technology is also developed, the utilization rate of equipment related to audio functions is higher and higher, and many audio-related equipment have various entertainment functions, such as video playing, digital camera shooting, games, GPS navigation and the like, and the audio equipment is required to have good audio playing performance and a more and more compact space structure. The requirements of people on devices related to audio functions are not limited to playing of video or audio, but also put higher demands on miniaturization, portability, sound quality and the like of the devices related to audio.

In audio related devices, it is often necessary to equip miniature electroacoustic transducers for the playback of audio signals, wherein the most commonly used miniature electroacoustic transducers are moving-coil miniature loudspeakers. In order to ensure the vibration balance of the loudspeaker under large amplitude, an auxiliary diaphragm system at the bottom of the voice coil needs to be designed. In order to ensure that vibration fatigue disconnection does not occur in the electrified circuit inside the loudspeaker under large amplitude, the electrified circuit inside the loudspeaker is usually designed into a Flexible Printed Circuit (FPC) structure, so that a copper layer is ensured to be thin, stress is small, and disconnection caused by stress concentration is avoided. The flexible circuit board needs to be communicated with the voice coil at the inner side of the loudspeaker and needs to be communicated with the basin frame at the outer side of the loudspeaker, and therefore pad structures need 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 lines, and the other 2 FPCs are used for structural symmetry simulation, so that the vibration system is guaranteed to be an axially symmetric structure, and the compliance and mass systems of the FPCs in the vibration process are relatively balanced. Since the flexible circuit board is usually disposed at the corner of the speaker, the outer pads of the 2 flexible circuit boards serving as the power lines at the two corners are usually connected through the circuit board on the frame, and then the 2 flexible circuit boards are led out through one corner to be connected with the external device. And the circuit board on the basin frame of connecting two bights needs to occupy certain space, will lead to the inside length direction of speaker to go up the size limited for inside is used for arranging the area of magnetic circuit limited, makes the speaker driving capability reduce, and the effect of putting outward is poor.

Disclosure of Invention

In view of the above, it is desirable to provide a speaker and a terminal device, which are convenient for improving the external playing effect.

In a first aspect of the embodiments of the present application, a speaker is provided, which includes a frame, a magnetic circuit assembly and a vibration assembly, the magnetic circuit assembly and the vibration assembly are all disposed on the frame, the vibration assembly includes a voice coil and a flexible circuit board, the voice coil is disposed in the frame, the flexible circuit board includes a vibration portion, a fixing portion and a bending portion, the vibration portion is connected to the voice coil, the fixing portion is connected to the frame, the bending portion is connected to the vibration portion and the fixing portion, two first pads are disposed on the vibration portion, two second pads are disposed on the corresponding fixing portion, two lines electrically connecting the first pads and the second pads are disposed on the corresponding bending portion, the first pads are used for electrically connecting to the voice coil, the second pads are used for connecting to the frame, one bending portion is only present in the flexible circuit board, and the two lines extend side by side in the bent portion.

The loudspeaker is through designing two double-channel line structures side by side on a flexible circuit board, make positive negative pole all draw forth the basin frame through two first pads of the vibration portion of a flexible circuit board, when making basin frame and flexible circuit board intercommunication, need not connect two bights of basin frame, only need follow a bight draw forth positive negative circuit can, make the basin frame reduce the influence of speaker overall dimension, can increase the size of basin frame, make magnetic circuit assembly's area and volume obtain increasing, magnetic induction B obtains increasing, thereby the electric power transduction coefficient of loudspeaker has been promoted, and then make the external power of putting of loudspeaker can obtain increasing, obtain better audio.

In a possible design of the first aspect, the 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, an accommodating cavity is defined between the side walls, and the voice coil is disposed in the accommodating cavity.

In a 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 disposed in the accommodating cavity, the side magnet is disposed 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 disposed in the gap, the central pole piece is attached to one surface of the central magnet facing the top wall, the side pole piece is disposed on the side wall and located on one surface of the side magnet facing the top wall, and the lower pole piece is disposed on one surface of the central magnet and one surface of the side magnet near the bottom wall.

In one possible design of the first aspect, the two side magnets are arranged symmetrically on both sides of the central magnet. The two edge magnets arranged in central symmetry can improve the structural stability of the loudspeaker and enhance the magnetic field of the loudspeaker.

In a possible design of the first aspect, the side wall is further provided with an installation block, the installation block deviates from one side of the side wall and is provided with a limiting block, the limiting block is arranged on one side of the top wall, the side pole piece passes through the installation block and is arranged on the side wall, and the limiting block is limited on one side of the top wall. The design of the limiting block can limit the position of the edge pole piece in the basin frame.

In a possible design of the first aspect, the vibration assembly further includes a diaphragm and an auxiliary diaphragm, the diaphragm is connected with the voice coil, the outer periphery of the diaphragm is connected with the top wall of the voice coil, the auxiliary diaphragm is arranged on the side of the voice coil far away from the diaphragm, one side of the auxiliary diaphragm is connected with the voice coil, the other side of the auxiliary diaphragm is connected with the side pole piece, and the flexible circuit board is located between the auxiliary diaphragm and the diaphragm. The design of the auxiliary vibrating diaphragm can ensure the balance of vibration and reduce swing, thereby preventing the voice coil from rolling vibration.

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

In a possible design of the first aspect, the diaphragm includes a first connection portion, a second connection portion, and a sound-emitting portion, the first connection portion is connected to the top surface, the second connection portion is connected to the top wall, and the sound-emitting portion is connected to the first connection portion and the second connection portion.

In a 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 a 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 setting of packing ring can prevent that vibrating diaphragm and flexible circuit board from taking place the interference when the vibration.

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

In a possible design of the first aspect, the sub-diaphragm includes a third connecting portion, a fourth connecting portion, and a balance portion, the third connecting portion is connected to the bottom surface, the fourth connecting portion is connected to the side pole piece, and the balance portion is connected to the third connecting portion and the fourth connecting portion.

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

In a possible design of the first aspect, an avoiding groove is formed in the edge piece, the first pad is located on the avoiding groove, the balance portion of the secondary diaphragm is located in the avoiding groove, and the fourth connecting portion is connected to one side of the edge piece, which is close to the avoiding groove. The design of the avoidance groove can prevent the interference between the side pole piece and the auxiliary vibrating diaphragm when vibrating.

In a possible design of the first aspect, the two first pads are located on two sides of the circuit and are electrically connected to the lead of the voice coil, respectively, two third pads are disposed on one side of the mounting block, which faces the top wall, and the second pads are electrically connected to the third pads, respectively.

In a possible design of the first aspect, an internal circuit is further disposed in the basin stand, one side of the internal circuit is connected to the third pad, and the other side of the internal circuit extends towards one side of the bottom wall. The design of the internal circuit is convenient for electrically connecting the flexible circuit board with the external circuit.

In a possible design of the first aspect, the basin stand further comprises a cover plate covering the accommodating cavity, the cover plate is arranged on the top wall, the side wall extends to one side far away from the accommodating cavity to form a sound outlet, a sound outlet is formed in one side, close to the top wall, of the sound outlet, and a sound outlet groove is formed in the cover plate facing the sound outlet. 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.

In a possible design of the first aspect, a side of the top wall, which is far away from the accommodating cavity, extends in a direction far away from the bottom wall to form an installation portion, an installation cavity is defined between the installation portion and the top wall, and the cover plate is disposed in the installation cavity.

In a second aspect of the embodiments of the present application, a terminal device is 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 loudspeaker shown in fig. 1.

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

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

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

Description of the main elements

Loudspeaker 100

Basin stand 10

Roof wall 11

Bottom wall 12

Mounting part 121

Side wall 13

Long side wall 131

Short side wall 132

Mounting block 133

Third pad 1331

The stop block 134

Accommodating chamber 14

Cover plate 15

Sound outlet groove 151

Sound output part 16

Sound outlet 161

Mounting portion 17

Mounting cavity 18

Internal wiring 19

Magnetic circuit assembly 20

Center magnet 21

Edge magnet 22

Avoidance parts

221, 251

Central pole piece 23

Edge pole piece 24

Avoidance groove 241

Lower pole piece 25

Vibration assembly 30

Voice coil 31

Top surface 311

Bottom surface 312

Gasket 313

Dog 3131

Diaphragm 32

First connection portion 321

Second connecting part 322

Sounding part 323

Ball top 33

Sub-diaphragm 34

Third connecting part 341

Fourth connecting portion 342

Balance part 343

Flexible circuit board 35

Vibration part 351

First pad 3511

Fixed part 352

Second pad 3521

Bending part 353

The following detailed description will further illustrate the present 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", etc., if used, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified. "Upper," "lower," "left," "right," and like directional terms are defined relative to the schematically-disposed orientations of elements in the figures, and it is to be understood that the directional terms are relative terms, which are used for descriptive and clarity purposes and are intended to correspond to changes in the orientation in which the elements in the figures are disposed.

In the present application, the term "connected", if used, is to be understood broadly, unless otherwise explicitly stated or limited, for example "connected" may be a fixed connection, a detachable connection, or an integral part; may be directly connected or indirectly connected through an intermediate. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings, the drawings showing the partial structure of the device are not necessarily to scale, and are merely exemplary, which should not limit the scope of the invention.

As shown in fig. 1, a speaker 100 is provided according to a first embodiment of the present application. The speaker 100 may be provided in an electronic device in a packaged or integrated manner.

As shown in fig. 2, the speaker 100 includes a frame 10, a magnetic circuit member 20, and a vibration member 30. The frame 10 is a supporting component for supporting and protecting each component inside the speaker 100, and the speaker 100 can be installed and fixed in an electronic device. The magnetic circuit component 20 and the vibration component 30 are both arranged on the basin stand 10. The magnetic circuit assembly 20 is used 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 interact with a fixed magnetic field to generate vibration to generate sound.

Referring to fig. 3, the frame 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 an accommodating 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 away from the accommodating cavity 14 to form a sound outlet portion 16. A sound outlet 161 is arranged on one side of the sound outlet 16 close to the top wall 11. The cover plate 15 is provided with a sound outlet groove 151 facing the sound outlet 161. The cover 15 is engaged with the sound emitting portion 16 so that the sound emitted from the speaker 100 is transmitted to the outside through the sound outlet 161 and the sound outlet groove 151.

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

In some embodiments, the frame 10 is a generally rectangular frame structure, with the side walls 13 being formed by two opposing long side walls 131 and two opposing short side walls 132.

The magnetic circuit assembly 20 includes a center magnet 21, a side magnet 22, a center pole piece 23, a side pole piece 24, and a lower pole piece 25. The central magnet 21 is disposed in the accommodating chamber 14. The number of the side magnets 22 is two, and the side magnets are arranged on two sides of the central magnet 21 in a central symmetry manner. A gap is formed between the side magnets 22 and the center magnet 21. The shape of the central pole piece 23 corresponds to that 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 arranged on the side wall 13 and is positioned on one 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 one surface of the central magnet 21 and the side magnets 22 close to the bottom wall 12. The central magnet 21 and the side magnet 22 are used for generating a fixed magnetic field, and the central pole piece 23, the side pole piece 24 and the lower pole piece 25 are used for conducting magnetism, so that the N pole and the S pole of the central magnet 21 and the side magnet 22 are concentrated in a gap between the central magnet 21 and the side magnet 22 through a loop, and a strong magnetic field is generated in the gap.

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

The side wall 13 is further provided with a mounting block 133. The mounting block 133 is used to limit the position where the side pole piece 24 is disposed. And a limiting block 134 is arranged on one surface of the mounting block 133 departing from the side wall 13. The limiting block 134 is disposed on one side of the mounting block 133 close to the top wall 11, and the limiting block 134 is used for limiting the setting height of the side pole piece 24. The side pole piece 24 is arranged on the side wall 13 through the mounting block 133, and is limited by the limiting block 134 at one side of the limiting block 134 departing from the top wall 11.

In some embodiments, the central pole piece 23, the side pole pieces 24 and the lower pole piece 25 are iron pieces, but not limited thereto, the central pole piece 23, the side pole pieces 24 and the lower pole piece 25 can also be made of magnetic conductive material 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 central magnet 21. The voice coil 31 is located in the accommodating cavity 14 and is disposed in a gap formed between the central magnet 21 and the side magnet 22. The voice coil 31 is used for receiving an electrical signal (alternating audio current) to be forced to move in a fixed magnetic field formed by the magnetic circuit assembly 20. The inner peripheries of the diaphragms 32 are respectively connected with the voice coils 31, and the outer peripheries of the diaphragms are respectively connected with the top wall 11. The diaphragm 32 is configured to vibrate with the movement of the voice coil 31, so as 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 arranged on one surface of the voice coil 31 far 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 side pole piece 24. The sub-diaphragm 34 is used to ensure the balance of vibration and reduce 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 for providing 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 adjacent to the top wall 11 and a bottom surface 312 adjacent to the bottom wall 12.

The diaphragm 32 includes a first connecting portion 321, a second connecting portion 322, and a sound-emitting portion 323. The first connecting 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 generating unit 323 connects the first connecting unit 321 and the second connecting unit 322. The sound emitting portion 323 has a substantially hemispherical shape in 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 (PEEK), Polyethylene Naphthalate (PEN), Polyetherimide (PEI), Polyurethane (PU), Thermoplastic Elastomer (TPE), Thermoplastic polyester Elastomer (TPEE), silica gel or rubber material, and breathable mesh.

The vibration assembly 30 includes two sub-diaphragms 34 having central symmetry. The sub-diaphragm 34 includes a third connecting portion 341, a fourth connecting portion 342, and a balance portion 343. The third connection portion 341 is connected to the bottom surface 312. The fourth connecting portion 342 is connected to a surface of the side pole piece 24 facing away from the mounting block 133. The balance portion 343 connects the third connection portion 341 and the fourth connection portion 342. The balancing part 343 has a substantially hemispherical shape in cross section and protrudes in a direction opposite to the protruding direction of the sound generating part 323.

In some embodiments, the sub-diaphragm 34 is substantially in the shape of an elongated plate, and the middle portion is convex toward one side.

The sub-diaphragm 34 and the diaphragm 32 are made of the same material, and it is understood that the sub-diaphragm 34 may be made of a material different from that of 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 in accordance 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 bent portion 353 connects the vibrating portion 351 and the fixing portion 352. The bending portion 353 has certain elasticity.

Specifically, referring to fig. 5, the voice coil 31 further includes a washer 313. The shape of the washer 313 matches the shape of the top surface 311 of the voice coil, and the washer 313 is disposed on the top surface 311 of the voice coil 31. The first connecting portion 321 is connected to a side of the gasket 313 away from the top surface 311. The vibration assembly 30 includes two flexible circuit boards 35 disposed in a central symmetry manner, the two flexible circuit boards 35 have the same structure, and the vibration portions 351 of the two flexible circuit boards 35 are respectively located at one corner of the voice coil 31. At least one of the flexible circuit boards 35 has two first pads 3511 on the vibrating portion 351, two second pads 3521 on the corresponding fixing portion 352, and two wires (not shown) electrically connecting the first pads 3511 and the second pads 3521 on the corresponding bending portion 353. The first pad 3511 is used for electrically connecting with the voice coil 31, and the second pad 3521 is used for connecting with the frame 10, so that an external electrical signal is 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 lines connecting the first bonding pad 3511 and the second bonding pad 3521 extend in the bending portion 353 side by side, so that the two lines are simultaneously stressed and moved during sound production to prevent falling. The two first pads 3511 are located on two sides of the circuit and are electrically connected to leads (not shown) of the voice coil 31 by soldering, respectively. The mounting block 133 on one corner of the frame 10 is provided with two third pads 1331 on the side facing the top wall 11. The second pads 3521 are electrically connected to the third pads 1331 by soldering, respectively.

A stopper 3131 is disposed on a side of the gasket 313 close to the top surface 311, and the vibration portion 351 is attached to a side of the stopper 3131 close to the top surface 311 and connected to the voice coil 31 through the first pad 3511. The stopper 3131 is configured to limit a position where the vibration portion 351 is disposed, so as to prevent interference when vibrating due to a close position of the flexible circuit board 35 and the diaphragm 32.

An internal circuit 19 is also provided within the frame 10. The inner wiring 19 is connected to the third land 1331 at one side and extends toward the bottom wall 12 at the other side to connect the flexible circuit board 35 electrically connected to the third land 1331 with an external circuit.

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

Two centrosymmetries the flexible circuit board 35 is located short lateral wall 132, limit pole piece 24 is relative be equipped with on two centrosymmetries's the bight of basin frame 10 and dodge groove 241, and first pad 3511 is located and dodges groove 241 place bight, the balancing part 343 of secondary diaphragm 34 is located in dodging groove 241, just fourth connecting portion 342 is close to with limit pole piece 24 dodge one side of groove 241 and connect. 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 22 are free from the first bonding pad 3511 and the sub-diaphragm 34.

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 vibrating portion 351 is adapted to the shape of the washer 313 of the voice coil 31 and is attached to the washer 313 by means of adhesion, and the top surface 311 of the voice coil 31 is adhered to the washer 313, so that when the voice coil 31 moves, there is no relative movement between the vibrating portion 351 and the voice coil 31, and the welding point between the first pad 3511 and the lead wire 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 adhesively attached to the mounting block 133, so that the fixing portion 352 is stably connected to the frame 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, and the winding length L corresponding to the voice coil 31, when the voice coil 31 is loaded with a voltage and generates a current i, the driving force that can be generated is F, where F is BLi, where BL is called the power transduction coefficient.

Loudspeaker 100, through two double-channel line structures side by side of design on a flexible circuit board 35, make positive negative pole all can pass through two first pads 3511 of the vibration portion 351 of a flexible circuit board 35, through internal line 19 in basin frame 10, draw forth on a bight of basin frame 10, when making basin frame 10 and flexible circuit board 35 communicate, need not connect two bights of basin frame 10, only need follow a bight draw forth positive negative circuit can, make the influence of internal line 19 to loudspeaker 100 overall dimension in the basin frame 10 reduce, can increase the size of basin frame 10, make magnetic circuit assembly 20's area and volume obtain increasing, magnetic induction B obtains increasing, thereby the electric power transduction coefficient of loudspeaker 100 has been promoted, and then make loudspeaker 100's external discharge capacity can obtain increasing, obtain better audio.

The present application is not limited to the flexible circuit board 35 and the sub-diaphragm 34 of the centrosymmetric design. It will be appreciated that in other embodiments, four flexible circuit boards 35 may be provided and connected to one corner of the voice coil 31. At least one of the flexible circuit boards 35 is provided with two parallel lines, and the two corresponding first pads 3511 and second pads 3521 are used for realizing the circuit communication between the voice coil 31 and one corner of the frame 10. Four sub-diaphragms 34 are designed on four corners of the frame 10, and the magnetic circuit assembly 20 is designed with four side magnets 22.

In the illustrated embodiment, the external shape of the speaker 100 is a rectangle, so as to illustrate the present invention, but it should be understood that the external shape of the speaker 100 may also be a regular shape or an irregular shape such as a sphere, a cylinder, a cube, etc., and the external shape is not limited herein, and an appropriate shape may be freely selected according to an 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 correspondingly adjusted according to the external shape of the speaker 100.

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

The terminal device can be a telephone, a mobile phone, a notebook computer, a tablet computer, a Bluetooth sound box, an intelligent voice terminal, a handheld game console, an intelligent watch and other electronic equipment with a communication function.

The above description is only an embodiment of the present application, but the 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 by the disclosure of the present application.

Claims

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

the vibration subassembly includes voice coil loudspeaker voice coil and flexible circuit board, the voice coil loudspeaker voice coil is located in the basin frame, the flexible circuit board includes vibration portion, fixed part and the portion of bending, vibration portion with the voice coil loudspeaker voice coil is connected, the fixed part with the basin frame is connected, the portion of bending is connected vibration portion with the fixed part, be equipped with two first pads in the vibration portion, corresponding be equipped with two second pads on the fixed part, it is corresponding be equipped with the electricity in the portion of bending and connect first pad with two circuits of second pad, first pad be used for with the voice coil loudspeaker voice coil electricity is connected, the second pad be used for with the basin frame is connected, one only exist one in the flexible circuit board the portion of bending, and two the circuit is in extend side by side in the portion of bending.

2. The loudspeaker of claim 1, wherein the frame comprises a top wall, a bottom wall opposite to the top wall, and side walls connecting the top wall and the bottom wall, 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 central magnet, a side magnet, a central pole piece, a side pole piece, and a lower pole piece, the central magnet is disposed in the receiving cavity, the side magnet is disposed 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 disposed in the gap, the central pole piece is attached to a surface of the central magnet facing the top wall, the side pole piece is disposed on the side wall and is located on a surface of the side magnet facing the top wall, and the lower pole piece is disposed on a surface of the central magnet and a surface of the side magnet adjacent to the bottom wall.

4. The speaker of claim 3, wherein the side magnets are two and are disposed on both sides of the center magnet with central symmetry.

5. The loudspeaker of claim 3, wherein the side wall is further provided with a mounting block, a limiting block is arranged on one surface of the mounting block departing from the side wall, the limiting block is arranged on one side of the mounting block close to the top wall, and the side pole piece is arranged on the side wall through the mounting block and limited on one side of the limiting block departing from the top wall by the limiting block.

6. The loudspeaker of claim 3, wherein the vibration assembly further comprises a diaphragm and a sub-diaphragm, wherein the inner periphery of the diaphragm is connected to the voice coil, the outer periphery of the diaphragm is connected to the top wall, the sub-diaphragm is disposed on a side of the voice coil remote from the diaphragm, one side of the sub-diaphragm is connected to the voice coil, the other side of the sub-diaphragm is connected to the side pole piece, and the flexible circuit board is disposed between the sub-diaphragm and the diaphragm.

7. The speaker of claim 6, wherein said voice coil includes a top surface adjacent to a side of said top wall, a bottom surface adjacent to a side of said bottom wall, and a lead for connection to said flexible circuit board, said lead being connected to said first pad.

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

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

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

11. The loudspeaker of claim 10, wherein said gasket has a stop on a side thereof adjacent said top surface, said vibrating portion being attached to said stop on a side thereof adjacent said top surface.

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

13. The loudspeaker of claim 12, wherein the vibration assembly comprises two flexible circuit boards and the sub-diaphragm arranged in a central symmetry.

14. The speaker of claim 12, wherein an evasion groove is formed in the side pole piece, the first bonding pad is located on the evasion groove, the balance portion of the sub-diaphragm is located in the evasion groove, and the fourth connection portion is connected to a side of the side pole piece close to the evasion groove.

15. The speaker of claim 5, wherein the two first pads are disposed on both sides of the circuit and electrically connected to the leads of the voice coil, respectively, and two third pads are disposed on a side of the mounting block facing the top wall, the second pads being electrically connected to the third pads, respectively.

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

17. The loudspeaker of claim 2, wherein the frame further comprises a cover plate covering the accommodating cavity, the cover plate is arranged on the top wall, the side wall further extends to one side far away from the accommodating cavity to form a sound outlet, a sound outlet is formed in one side of the sound outlet close to the top wall, 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 remote from the receiving cavity extends away from the bottom wall to form a mounting portion, the mounting portion and the top wall define a mounting cavity therebetween, and the cover plate is 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.