WO2022143235A1

WO2022143235A1 - Loudspeaker and terminal device

Info

Publication number: WO2022143235A1
Application number: PCT/CN2021/139405
Authority: WO
Inventors: 刘金华; 黎椿键; 朱统; 闫涛; 郭李
Original assignee: 华为技术有限公司
Priority date: 2020-12-30
Filing date: 2021-12-18
Publication date: 2022-07-07
Also published as: CN114697827B; CN114697827A

Abstract

A loudspeaker, comprising a basket, a magnetic circuit assembly and a vibration assembly. The magnetic circuit assembly and the vibration assembly are arranged on the basket, and the vibration assembly comprises a voice coil and a flexible circuit board, the voice coil being arranged in the basket, and the flexible circuit board comprising a vibration portion, a fixing portion and a bending portion connecting the vibration portion and the fixing portion, wherein the vibration portion is connected to the voice coil, the fixing portion is connected to the basket, the vibration portion is provided with two first bonding pads for being electrically connected to the voice coil, the fixing portion is provided with two second bonding pads for being connected to the basket, the bending portion is provided with two lines for electrically connecting the first bonding pads and the second bonding pads, there is only one bending portion in the flexible circuit board, and the two lines extend side by side in the bending portion. By designing two parallel two-path line structures on the flexible circuit board, positive and negative electrodes can be led out of the basket by means of the bending portion, so that the effect of the basket on the outer dimension of the loudspeaker is reduced, and the volume of the magnetic circuit assembly is increased, thereby improving the external playback capability of the loudspeaker and achieving better sound effects.

Description

Speakers and Terminal Devices

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of the Chinese patent application with the application number 202011612749.3 and the application name "Speaker and Terminal Device" filed with the China Patent Office on December 30, 2020, the entire contents of which are incorporated into this application by reference.

technical field

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

Background technique

With the development of science and technology and the advancement of communication technology, mobile multimedia technology has also developed, and the utilization rate of equipment related to audio functions is getting higher and higher. Many audio-related equipment has a variety of entertainment functions, such as video playback, digital video, games , GPS navigation, etc., all require audio equipment to have good audio output performance and an increasingly compact space structure. People's requirements for equipment related to audio functions are not limited to playback of video or audio, but also put forward higher requirements for the miniaturization, portability, and sound quality of audio-related equipment.

In audio-related equipment, miniature electro-acoustic transducers are usually required to play audio signals, among which the most commonly used miniature electro-acoustic transducers are moving coil type miniature speakers. In order to ensure the vibration balance of the loudspeaker under large amplitude, it is necessary to design an auxiliary diaphragm system located at the bottom of the voice coil. In order to ensure that the energized circuit inside the loudspeaker does not suffer from vibration fatigue and disconnection under large amplitude, the energized circuit inside the speaker is usually designed as a flexible circuit board (FPC) structure to ensure that the copper layer is thin and the stress is small to avoid the occurrence of stress concentration. disconnected. The flexible circuit board needs to be connected to the voice coil on the inside of the speaker, and needs to be connected to the basin frame on the outside of the speaker. Therefore, the pad structure needs to be designed on both the inner and outer sides of the flexible circuit board. In the prior art solution, it is usually necessary to design 4 FPCs, of which 2 FPCs are used as energized lines, and the other 2 are used as structural symmetry simulations to ensure that the vibration system is an axially symmetrical structure, so that the compliance of the FPC in the vibration process and the quality system are relative. balance. Since the flexible circuit board is usually set at the corner of the speaker, it is usually necessary to connect the outer pads of the two flexible circuit boards on the two corners as the power lines through the circuit board on the basin frame, and then pass a corner The two flexible circuit boards are drawn out to connect with external devices. The circuit board on the basin frame connecting the two corners needs to occupy a certain space, which will limit the size of the speaker in the length direction, which will limit the area used for arranging the magnetic circuit inside the speaker, which will reduce the driving ability of the speaker and make it difficult for external speakers. poor effect.

SUMMARY OF THE INVENTION

In view of this, it is necessary to provide a loudspeaker and a terminal device, which is convenient to improve the effect of external broadcasting.

In a first aspect of the embodiments of the present application, a loudspeaker is provided, which includes a basin frame, a magnetic circuit component and a vibration component, wherein the magnetic circuit component and the vibration component are both disposed on the basin frame, and the vibration component includes a sound A coil and a flexible circuit board, the voice coil is arranged in the basin frame, the flexible circuit board includes a vibration part, a fixed part and a bending part, the vibration part is connected with the voice coil, and the fixed part is connected with The basin frame is connected, the bending part is connected to the vibration part and the fixed part, the vibration part is provided with two first pads, and the corresponding fixed part is provided with two second pads. a pad, two lines for electrically connecting the first pad and the second pad are arranged on the corresponding bending portion, and the first pad is used for electrical connection with the voice coil, The second solder pad is used for connecting with the basin frame, there is only one bent portion in one of the flexible circuit boards, and the two lines extend side by side in the bent portion.

The speaker is designed with two side-by-side dual-channel circuit structures on a flexible circuit board, so that both positive and negative electrodes can be drawn out of the basin frame through the two first pads of the vibration part of a flexible circuit board, so that the basin frame and the flexible circuit can be connected. When the circuit board is connected, it is not necessary to connect the two corners of the basin frame, and only need to draw the positive and negative circuits from one corner, so that the influence of the basin frame on the external dimensions of the speaker can be reduced, and the size of the basin frame can be increased to make the magnetic The area and volume of the circuit components are increased, and the magnetic induction intensity B is increased, thereby improving the power conversion coefficient of the speaker, thereby increasing the speaker's external output capability and obtaining better sound effects.

In a possible design of the first aspect, the basin frame includes a top wall, a bottom wall disposed opposite to the top wall, and a side wall connecting the top wall and the bottom wall, the side walls surrounding An accommodating cavity is formed, and the voice coil is arranged in the accommodating cavity.

In a possible design of the first aspect, the magnetic circuit assembly includes a center magnet, a side magnet, a center pole piece, a side pole piece and a lower pole piece, the center magnet is arranged in the accommodating cavity, and the side magnets Set on one side of the center magnet, there is a gap between the side magnet and the center magnet, the voice coil is sleeved outside the center magnet, the voice coil is set in the gap, and the center The pole piece is attached to the side of the central magnet facing the top wall, the side pole piece is arranged on the side wall and is located on the side of the side magnet facing the top wall, the lower pole piece It is arranged on one side of the center magnet and the side magnet close to the bottom wall.

In a possible design of the first aspect, there are two side magnets, and they are centrally symmetrically arranged on both sides of the center magnet. The two side magnets arranged symmetrically in the center can improve the structural stability of the loudspeaker and enhance the magnetic field of the loudspeaker.

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

In a possible design of the first aspect, the vibrating assembly further includes a vibrating membrane and a secondary vibrating membrane, the inner circumference of the vibrating membrane is connected to the voice coil, and the outer circumference is connected to the top wall, and the secondary vibrating membrane is arranged on the top wall. On the side of the voice coil away from the vibrating membrane, one side of the secondary vibrating membrane is connected to the voice coil, and the other side is connected to the side pole piece, and the flexible circuit board is located between the secondary vibrating membrane and the side pole piece. between the diaphragms. The design of the sub-diaphragm can ensure the balance of vibration and reduce swing, thereby preventing the rolling vibration of the voice coil.

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

In a possible design of the first aspect, the diaphragm includes a first connecting part, a second connecting part and a sounding part, the first connecting part is connected to the top surface, and the second connecting part is connected to the top surface. The wall is connected, and the sounding part connects the first connecting part and the second connecting part.

In a possible design of the first aspect, the vibration component further includes a spherical top, and the spherical top is attached to the first connecting portion. The design of the dome is beneficial to improve the sound quality of the speaker.

In a possible design of the first aspect, the voice coil further includes a washer, the washer is disposed on the top surface, and the first connection portion is connected to a side of the washer away from the top surface. The arrangement of the washer can prevent interference between the diaphragm and the flexible circuit board when vibrating.

In a possible design of the first aspect, a block is provided on a side of the washer close to the top surface, and the vibrating portion is attached to a side of the block close to the top surface. The arrangement of the stopper further increases the barrier between the diaphragm and the flexible circuit board, so as to prevent interference between the diaphragm and the flexible circuit board when vibrating.

In a possible design of the first aspect, the sub-diaphragm includes a third connection part, a fourth connection part and a balance part, the third connection part is connected to the bottom surface, and the fourth connection part is connected to the side The pole pieces are connected, and the balance part connects the third connection part and the fourth connection part.

In a possible design of the first aspect, the vibrating component includes two flexible circuit boards and the secondary vibrating membrane that are arranged symmetrically in the center. The two flexible circuit boards and the sub-diaphragms arranged symmetrically in the center can improve the structural stability of the speaker.

A possible design of the first aspect, the side pole piece is provided with an escape groove, the first pad is located on the escape groove, the balance part of the secondary diaphragm is located in the escape groove, and the The fourth connection part is connected to the side of the side pole piece close to the escape groove. The design of the avoidance groove can prevent the interference between the side pole piece and the auxiliary diaphragm when it vibrates.

In a possible design of the first aspect, the two first pads are located on two sides of the line and are respectively electrically connected to the leads of the voice coil, and the mounting block faces the side of the top wall Two third pads are provided, and the second pads are respectively electrically connected to the third pads.

In a possible design of the first aspect, the basin frame is further provided with an internal circuit, one side of the internal circuit is connected to the third solder pad, and the other side extends toward the bottom wall. The design of the inner circuit facilitates the electrical connection of the flexible circuit board with the outer circuit.

In a possible design of the first aspect, the basin frame further includes a cover plate covering the accommodating cavity, the cover plate is disposed on the top wall, and the side walls are further away from the accommodating cavity. A sound outlet is formed by extending from one side of the sound outlet, and a sound outlet is provided on the side of the sound outlet close to the top wall, and the cover plate is provided with a sound outlet toward the sound outlet. The cover plate is matched with the sound outlet part, so that the sound emitted by the speaker is transmitted outward through the sound outlet and the sound outlet slot.

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

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

Description of 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 shown in FIG. 1 .

FIG. 3 is a perspective view of the speaker shown in FIG. 2 from 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 shown in FIG. 1 with the cover plate, the diaphragm and the dome removed.

Description of main component symbols

speaker 100

Pot stand 10

top wall 11

Bottom wall 12

Installation Department 121

side wall 13

Long side walls 131

Short sidewall 132

Mounting block 133

The third pad 1331

Limit block 134

accommodating cavity 14

Cover 15

Outlet slot 151

Voice Department 16

Outlet 161

Installation Department 17

Installation cavity 18

Internal line 19

Magnetic circuit assembly 20

Center magnet 21

Side Magnet 22

Avoidance Department

221, 251 center pole piece 23

Side pole piece 24

Avoidance slot 241

Lower pole piece 25

Vibration components 30

Voice coil 31

top 311

Bottom 312

Washer 313

Stopper 3131

Diaphragm 32

The first connection part 321

The second connection part 322

Voice Department 323

Dome 33

Secondary diaphragm 34

The third connection part 341

Fourth connection part 342

Balance Department 343

Flexible circuit board 35

Vibration Department 351

The first pad 3511

Fixed part 352

The second pad 3521

Bending part 353

The following specific embodiments will further illustrate the present invention in conjunction with the above drawings.

Detailed ways

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

Hereinafter, if used, the terms "first", "second", etc. are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first", "second", etc., may expressly or implicitly include one or more of that feature. In the description of this application, unless stated otherwise, "plurality" means two or more. Orientation terms such as "upper", "lower", "left" and "right" are defined relative to the orientation in which the components in the drawings are schematically placed. It should be understood that these directional terms are relative concepts, and they are used with Relative to the description and clarification, it may vary accordingly depending on the orientation in which the components are placed in the figures.

In this application, if it is used, unless otherwise expressly specified and limited, the term "connection" should be understood in a broad sense, for example, "connection" can be a fixed connection, a detachable connection, or an integrated; it can be Directly connected or indirectly connected through an intermediary. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

When the following embodiments are described in detail in conjunction with schematic diagrams, for the convenience of description, the diagrams representing the partial structures of the devices will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of the protection of the present application.

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

As shown in FIG. 2 , the speaker 100 includes a basin frame 10 , a magnetic circuit component 20 and a vibration component 30 . The basin frame 10 is a support component, used for supporting and protecting various components inside the speaker 100 , and can install and fix the speaker 100 in an electronic device. The magnetic circuit assembly 20 and the vibration assembly 30 are both disposed on the basin frame 10 . The magnetic circuit assembly 20 is used to provide a fixed magnetic field to drive the vibration assembly 30 to vibrate. The vibration component 30 is used to excite a variable magnetic field through a current to interact with the fixed magnetic field to generate vibration and sound.

Please also refer to FIG. 3 , the basin frame 10 includes a top wall 11 , a bottom wall 12 disposed 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 enclosed between the side walls 13 .

The basin frame 10 further includes a cover plate 15 covering the accommodating cavity 14 . The cover plate 15 is arranged on the top wall 11 . The side wall 13 also extends to a side away from the accommodating cavity 14 to form a sound outlet 16 . A sound outlet 161 is provided on the side of the sound outlet 16 close to the top wall 11 . The cover plate 15 is provided with a sound outlet slot 151 toward the sound outlet 161 . The cover plate 15 cooperates with the sound outlet 16 , so that the sound emitted by the speaker 100 propagates outward through the sound outlet 161 and the sound outlet slot 151 .

A side of the top wall 11 away from the accommodating cavity 14 extends in a direction away from the bottom wall 12 to form an installation portion 17 . An installation cavity 18 is enclosed between the installation portion 17 and the top wall 11 . The cover plate 15 is arranged in the installation cavity 18 .

In some embodiments, the basin frame 10 is substantially a rectangular frame structure, and the side walls 13 are composed of two opposite long side walls 131 and two opposite 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 cavity 14 . There are two side magnets 22 , which are symmetrically arranged on both sides of the center magnet 21 . There is a gap between the side magnets 22 and the center magnet 21 . The shape of the center pole piece 23 corresponds to the shape of the center magnet 21 , and the center pole piece 23 is attached to the side of the center magnet 21 facing the top wall 11 . The side pole piece 24 is disposed on the side wall 13 and on the side 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 the side of the center magnet 21 and the side magnet 22 close to the bottom wall 12 . The center magnet 21 and the side magnets 22 are used to generate 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 the N and S poles of the center magnet 21 and the side magnet 22 are The loop is concentrated in the gap between the center magnet 21 and the side magnet 22, so that 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 magnets 22 are substantially L-shaped, and the side pole pieces 24 are substantially hollow plate-shaped.

A mounting block 133 is also provided on the side wall 13 . The mounting block 133 is used to limit the setting position of the side pole piece 24 . A limiting block 134 is provided on the side of the mounting block 133 facing away from the side wall 13 . The limiting block 134 is disposed on the side of the mounting block 133 close to the top wall 11 , and the limiting block 134 is used to limit the setting height of the side 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 to 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, the center pole piece 23 , the side pole piece 24 and the lower pole piece 25 can also be used Made of magnetic conductive materials such as silicon steel.

Please also refer to FIG. 4 , the vibration component 30 includes a voice coil 31 , a diaphragm 32 , a dome 33 , a secondary 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 the gap formed between the center magnet 21 and the side magnets 22 . The voice coil 31 is used to receive an electrical signal (alternating audio current), so as to move under force in the fixed magnetic field formed by the magnetic circuit assembly 20 . The inner circumference of the diaphragm 32 is respectively connected with the voice coil 31 , and the outer circumference is respectively connected with the top wall 11 . The diaphragm 32 is used to vibrate with the movement of the voice coil 31 to push the air to produce sound. The spherical top 33 is attached to the inner circumference of the diaphragm 32 . The auxiliary diaphragm 34 is disposed on the side of the voice coil 31 away from the diaphragm 32 . One side of the auxiliary diaphragm 34 is connected to the voice coil 31 , and the other side is connected to the side pole piece 24 . . The auxiliary diaphragm 34 is used to ensure the balance of vibration and reduce swing when the voice coil 31 and the diaphragm 32 have large amplitudes, thereby preventing the voice coil 31 from rolling. The flexible circuit board 35 is connected to the basin frame 10 and the voice coil 31 , and is located between the auxiliary 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 electrical signals to the voice coil 31 to control the movement of the voice coil 31 .

In some embodiments, the voice coil 31 is an annular structure, the diaphragm 32 is substantially annular, and the dome 33 is substantially rectangular.

The voice coil 31 includes a top surface 311 on a side close to the top wall 11 and a bottom surface 312 on a side close to the bottom wall 12 .

The diaphragm 32 includes a first connecting portion 321 , a second connecting portion 322 and a sounding portion 323 . The first connecting portion 321 is connected to the top surface 311 and can move with the movement of the voice coil 31 . The second connecting portion 322 is connected to the top wall 11 . The sounding part 323 connects the first connecting part 321 and the second connecting part 322 . The section of the sound-emitting portion 323 is substantially hemispherical. 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 paper, animal fiber, bulletproof cloth, PP (Polypropylene, polypropylene), polyimide (Polyimide, PI), polyether ether ketone (Poly Ether Ether Ketone, PEEK) , polyethylene naphthalate (Polyethylene Naphthalate, PEN), polyetherimide (Polyetherimide, PEI), polyurethane (Polyurethane, PU), thermoplastic elastomer (Thermoplastic Elastomer, TPE), thermoplastic polyester One of Ester Elastomer (TPEE), silicone or rubber material and breathable mesh.

The vibrating assembly 30 includes the two sub-diaphragms 34 that are symmetrical with the center. The secondary diaphragm 34 includes a third connection portion 341 , a fourth connection portion 342 and a balance portion 343 . The third connecting portion 341 is connected to the bottom surface 312 . The fourth connecting portion 342 is connected to the side of the side pole 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 cross section of the balance portion 343 is substantially hemispherical, and its protruding direction is opposite to the protruding direction of the sounding portion 323 .

In some embodiments, the sub-diaphragm 34 is substantially in the shape of a long sheet, and the middle portion is convex toward one side.

The secondary diaphragm 34 and the diaphragm 32 are made of the same material. It is understandable that the material used for the secondary diaphragm 34 may also be different from the material used for the diaphragm 32 .

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

Specifically, please refer to FIG. 5 at the same time, the voice coil 31 further includes a washer 313 . 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 washer 313 away from the top surface 311 . The vibration assembly 30 includes two flexible circuit boards 35 arranged symmetrically in the center. The structures of the two flexible circuit boards 35 are the same, and the vibration parts 351 of the two flexible circuit boards 35 are respectively located at one corner of the voice coil 31 . department. Wherein, at least one of the vibration parts 351 of the flexible circuit board 35 is provided with two first pads 3511 , the corresponding fixed part 352 is provided with two second pads 3521 , and the corresponding bending part 353 is provided with two first pads 3511 . There are two lines (not shown) electrically connecting the first pad 3511 and the second pad 3521 thereon. The first pad 3511 is used for electrical connection with the voice coil 31 , and the second pad 3521 is used for connection with the basin frame 10 , so that external electrical signals are transmitted through the basin frame 10 and the flexible circuit board 35 to the voice coil 31. There is only one bent portion 353 in one of the flexible circuit boards 35 , and two lines connecting the first pad 3511 and the second pad 3521 extend side by side in the bent portion 353 , so as to The two lines are forced to move at the same time when the sound is produced, so as to prevent them from falling off. The two first pads 3511 are located on both sides of the circuit, and are respectively electrically connected to the leads (not shown) of the voice coil 31 by soldering. Two third solder pads 1331 are provided on the side of the mounting block 133 on one corner of the basin frame 10 facing the top wall 11 . The second pads 3521 are respectively electrically connected to the third pads 1331 by soldering.

A stopper 3131 is provided on the side of the washer 313 close to the top surface 311 , and the vibrating portion 351 is attached to the side of the stopper 3131 close to the top surface 311 and passes through the first pad 3511 is connected to the voice coil 31 . The stopper 3131 is used to limit the position where the vibrating portion 351 is disposed, so as to prevent interference during vibration due to the proximity of the flexible circuit board 35 and the vibrating film 32 .

An internal circuit 19 is also provided in the basin frame 10 . One side of the inner circuit 19 is connected to the third pad 1331 , and the other side extends toward the bottom wall 12 to connect the flexible circuit board 35 electrically connected to the third pad 1331 to external circuits.

The inner circuit 19 is formed in the basin frame 10 by injection molding, but not limited thereto, the inner circuit 19 can also be installed in the basin frame 10 through a hole provided in the basin frame 10 .

The two centrally symmetric flexible circuit boards 35 are located on the short side walls 132 , the side pole pieces 24 are provided with avoidance grooves 241 on the two centrally symmetric corners of the basin frame 10 , and the first pad 3511 is located at the corner of the escape groove 241 , the balance portion 343 of the auxiliary diaphragm 34 is located in the escape groove 241 , and the fourth connection portion 342 is connected to the side of the side pole piece 24 close to the escape groove 241 . The two side magnets 22 are arranged on the other two corners of the side pole piece 24, and 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 side avoids the first pad 3511 and the sub-diaphragm 34 .

Two corners of the bottom wall 12 are also provided with mounting portions 121 protruding outward. The side magnets 22 and the lower pole piece 25 are designed with

avoidance portions

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

The vibration part 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 bonding. When the voice coil 31 is moved, there is no relative movement between the vibrating part 351 and the voice coil 31, so as to prevent the welding point between the first pad 3511 and the lead 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 means of bonding, so that the fixing portion 352 is stably connected to the mounting block 133 . on the pot rack 10.

When the voice coil 31 is inserted into the magnetic gap of the magnetic circuit assembly 20, the magnetic induction intensity generated by the magnetic circuit assembly 20 is B, and the winding length L corresponding to the voice coil 31, when a voltage is applied to the voice coil 31 and a current i is generated, it can be The resulting driving force is F, where F=BLi, where BL is called the power transduction coefficient.

In the speaker 100 , by designing two side-by-side dual-path circuit structures on one flexible circuit board 35 , both positive and negative electrodes can pass through the two first pads 3511 of the vibration part 351 of one flexible circuit board 35 , and pass through the basin. The internal circuit 19 in the frame 10 is led out to one corner of the pot frame 10, so that when the pot frame 10 is communicated with the flexible circuit board 35, it is not necessary to connect the two corners of the pot frame 10, and it is only necessary to connect the pot frame 10 from one corner. The positive and negative circuits can be drawn out, so that the influence of the internal circuit 19 in the basin frame 10 on the external dimension of the speaker 100 is reduced, the size of the basin frame 10 can be increased, the area and volume of the magnetic circuit assembly 20 can be increased, and the magnetic induction intensity B can be increased. , so that the power conversion coefficient of the speaker 100 is improved, so that the external performance of the speaker 100 can be increased, and a better sound effect can be obtained.

The present application is not limited to the flexible circuit board 35 and the sub-diaphragm 34 with a center-symmetric design. It can be understood that, in other embodiments, four flexible circuit boards 35 can also be designed and connected to one corner of the voice coil 31 respectively. Among them, at least one of the flexible circuit board 35 is designed with two parallel lines, and through the corresponding two first pads 3511 and second pads 3521, the voice coil 31 and one corner of the basin frame 10 are realized. circuit is connected. Four sub-diaphragms 34 are correspondingly designed on the four corners of the basin frame 10 , and four side magnets 22 are correspondingly designed for the magnetic circuit assembly 20 .

In the illustrated embodiment, the outer shape of the speaker 100 is a rectangle for illustration, but it should be understood that the outer shape of the speaker 100 may also be a regular shape or an irregular shape such as a sphere, a cylinder, a cube, etc. This is not limited, and a suitable shape can be freely selected according to the application scene of the speaker 100 . The basin frame 10 , the magnetic circuit component 20 and the vibration component 30 included in the speaker 100 can be adjusted according to the shape of the speaker 100 .

The present application also proposes a terminal device, where the terminal device is provided with the above-mentioned speaker 100 .

The terminal device may be an electronic device with a communication function, such as a telephone, a mobile phone, a notebook computer, a tablet computer, a Bluetooth speaker, an intelligent voice terminal, a handheld game console or a smart watch.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this, and any changes or substitutions within the technical scope disclosed in the present application should be covered within the disclosure scope of the present application. .

Claims

A loudspeaker includes a basin frame, a magnetic circuit assembly and a vibration assembly, wherein the magnetic circuit assembly and the vibration assembly are both arranged on the basin frame, characterized in that:

The vibration component includes a voice coil and a flexible circuit board, the voice coil is arranged in the basin frame, the flexible circuit board includes a vibration part, a fixed part and a bending part, and 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 vibrating part and the fixing part, and two first pads are arranged on the vibrating part, on the corresponding fixing part There are two second pads, and two lines for electrically connecting the first pads and the second pads are arranged on the corresponding bending parts, and the first pads are used for connecting with all the The voice coil is electrically connected, the second pad is used for connecting with the basin frame, there is only one bending portion in one of the flexible circuit boards, and two of the lines are in the bending portion Extend side by side.
The loudspeaker of claim 1, wherein the basin frame comprises a top wall, a bottom wall opposite to the top wall, and a side wall connecting the top wall and the bottom wall, the side walls An accommodating cavity is enclosed between the walls, and the voice coil is arranged in the accommodating cavity.
The loudspeaker according to 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, and the center magnet is arranged in the accommodating cavity, The side magnet is arranged on one side of the center magnet, there is a gap between the side magnet and the center magnet, the voice coil is sleeved outside the center magnet, and the voice coil is arranged in the gap , the center pole piece is attached to the side of the center magnet facing the top wall, the side pole piece is arranged on the side wall and is located on the side of the side magnet facing the top wall, so The lower pole piece is arranged on one side of the center magnet and the side magnet close to the bottom wall.
The loudspeaker according to claim 3, wherein the number of the side magnets is two, and they are centrally symmetrically arranged on both sides of the center magnet.
The loudspeaker according to claim 3, wherein a mounting block is further provided on the side wall, a limit block is provided on the side of the mounting block facing away from the side wall, and the limit block is arranged on the The mounting block is close to the side of the top wall, the side pole piece is arranged on the side wall through the mounting block, and is limited by the limiting block to a side of the limiting block that is away from the top wall. side.
The loudspeaker according to claim 3, wherein the vibrating assembly further comprises a vibrating membrane and a secondary vibrating membrane, the inner circumference of the vibrating membrane is connected to the voice coil, the outer circumference is connected to the top wall, and the secondary vibrating membrane is connected. The vibrating membrane is arranged on the side of the voice coil away from the vibrating membrane, one side of the auxiliary vibrating membrane is connected with the voice coil, and the other side is connected with the side pole piece, and the flexible circuit board is located in the between the auxiliary diaphragm and the diaphragm.
The loudspeaker of claim 6, wherein the voice coil comprises a top surface on a side close to the top wall, a bottom surface on a side close to the bottom wall, and leads for connecting with the flexible circuit board , the lead is connected to the first pad.
The loudspeaker according to claim 7, wherein the diaphragm comprises a first connecting part, a second connecting part and a sounding part, the first connecting part is connected to the top surface, and the second connecting part Connected with the top wall, the sounding part is connected with the first connecting part and the second connecting part.
The loudspeaker according to claim 8, wherein the vibration component further comprises a dome, and the dome is attached to the first connecting portion.
The loudspeaker according to claim 8, wherein the voice coil further comprises a washer, the washer is provided on the top surface, and the first connecting portion and the washer are away from the side of the top surface connect.
The loudspeaker according to claim 10, wherein a block is provided on a side of the gasket close to the top surface, and the vibration part is attached to a side of the block close to the top surface.
The loudspeaker according to claim 7, wherein the sub-diaphragm comprises a third connection part, a fourth connection part and a balance part, the third connection part is connected to the bottom surface, and the fourth connection part connected with the side pole piece, and the balance part is connected with the third connection part and the fourth connection part.
The loudspeaker according to claim 12, wherein the vibration component comprises two flexible circuit boards arranged symmetrically in the center and the auxiliary diaphragm.
13. The loudspeaker according to claim 12, wherein an escape groove is provided on the side pole piece, the first pad is located on the escape groove, and the balance part of the auxiliary diaphragm is located in the escape groove and the fourth connecting portion is connected to the side of the side pole piece close to the escape groove.
The loudspeaker according to claim 5, wherein the two first pads are located on two sides of the line, and are respectively electrically connected to the leads of the voice coil, and the mounting block faces the top One side of the wall is provided with two third pads, and the second pads are respectively electrically connected to the third pads.
The loudspeaker according to claim 15, wherein an internal circuit is further provided in the basin frame, one side of the internal circuit is connected to the third solder pad, and the other side extends toward the bottom wall.
The loudspeaker according to claim 2, wherein the basin frame further comprises a cover plate covering the accommodating cavity, the cover plate is arranged on the top wall, and the side walls are further away from the One side of the accommodating cavity extends to form a sound outlet, a side of the sound outlet close to the top wall is provided with a sound outlet, and the cover plate is provided with a sound outlet toward the sound outlet.
The loudspeaker of claim 17, wherein a side of the top wall away from the accommodating cavity extends in a direction away from the bottom wall to form an installation portion, the installation portion and the top wall An installation cavity is formed between them, and the cover plate is arranged in the installation cavity.
A terminal device, characterized in that, the terminal device is provided with the speaker according to any one of claims 1-18.