CN114697827B - Speaker and terminal device - Google Patents

Abstract

A loudspeaker, comprising a basin frame, a magnetic circuit assembly and a vibration assembly, the magnetic circuit assembly and the vibration assembly are arranged on the basin frame, the vibration assembly includes a voice coil and a flexible circuit board, the voice coil is arranged in the basin frame, and the flexible circuit board includes a vibration part, a fixed part and a bending part connecting the vibrating part and the fixed part, the vibrating part is connected to the voice coil, the fixed part is connected to the frame, and the vibrating part is provided with two first pads for electrical connection with the voice coil, There are two second pads for connecting with the basin frame on the fixed part, two lines electrically connecting the first pad and the second pad are provided on the bent part, and there is only one bend in the flexible circuit board section, and the two lines run side by side in the bend. By designing two side-by-side dual-channel circuit structures on the flexible circuit board, the positive and negative poles can be led out of the frame through a bending part, so that the impact of the frame on the speaker's overall size is reduced, and the volume of the magnetic circuit assembly is increased. Thereby improving the loudspeaker's loudspeaker ability and getting better sound effects.

Description

Speakers and Terminals

technical field

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

Background technique

With the development of science and technology and the progress of communication technology, mobile multimedia technology also develops, and the usage rate of equipment related to audio function is getting higher and higher. Many audio related equipment have various entertainment functions, such as video playback, digital camera, game , GPS navigation, etc., all require audio equipment to have good audio performance and an increasingly compact spatial structure. People's requirements for audio-related equipment are not limited to video or audio playback, but also put forward higher requirements for the miniaturization, portability, and sound quality of audio-related equipment.

In audio-related equipment, it is usually necessary to equip miniature electro-acoustic transducers for playing audio signals, and the most commonly used miniature electro-acoustic transducers are dynamic micro-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 lines inside the loudspeaker do not break due to vibration fatigue under large amplitude, the energized lines inside the speaker are usually designed as a flexible circuit board (FPC) structure to ensure that the copper layer is thin and the stress is small, avoiding stress concentration. Disconnected. The flexible circuit board needs to be connected to the voice coil on the inside of the speaker, and it needs to be connected to the basin frame on the outside of the speaker. Therefore, pad structures need to be designed on both the inside and outside of the flexible circuit board. In the existing technical solutions, 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 during the vibration process and the quality of the system are relatively 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 through a corner The two flexible circuit boards are led out to connect with external equipment. However, the circuit board on the basin frame connecting the two corners needs to occupy a certain amount of space, which will lead to the limitation of the internal length of the speaker, and the limitation of the internal area for arranging the magnetic circuit, which will reduce the driving ability of the speaker and reduce the poor effect.

Contents of the invention

In view of this, it is necessary to provide a loudspeaker and a terminal device, which are convenient for improving the loudspeaker effect.

According to the first aspect of the embodiments of the present application, a loudspeaker is provided, including a basin frame, a magnetic circuit assembly, and a vibration assembly, the magnetic circuit assembly and the vibration assembly are both arranged on the basin frame, and the vibration assembly includes a speaker ring and a flexible circuit board, the voice coil is arranged in the basin frame, the flexible circuit board includes a vibrating part, a fixed part and a bending part, the vibrating part is connected with the voice coil, the fixed part is connected with the The basin frame is connected, the bending part connects the vibrating part and the fixing part, two first pads are arranged on the vibrating part, and two second pads are arranged on the corresponding fixing part. Welding pads, two lines electrically connecting the first welding pad and the second welding pad are provided on the corresponding bending part, the first welding pad is used for electrical connection with the voice coil, The second soldering pad is used to connect with the basin frame, there is only one bending portion in one flexible circuit board, and the two lines extend side by side in the bending portion.

The loudspeaker is designed with two side-by-side dual-channel circuit structures on a flexible circuit board, so that the positive and negative electrodes can be drawn out of the basin frame through the two first pads of the vibration part of the flexible circuit board, so that the basin frame and the flexible circuit board When the circuit board is connected, there is no need to connect the two corners of the basin frame, just lead out the positive and negative circuits from one corner, so that the impact of the basin frame on the speaker's overall size can be reduced, and the size of the basin frame can be increased, making 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 loudspeaker's loudspeaker capability and obtaining better sound effects.

In a 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, and the side walls are surrounded by Forming an accommodating cavity, the voice coil is arranged in the accommodating cavity.

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 center magnet is arranged in the accommodating cavity, and the side magnet 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 on 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, and the lower pole piece It is arranged on the side of the central magnet and the side magnet close to the bottom wall.

In a possible design of the first aspect, there are two side magnets, which are arranged symmetrically 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, the side wall is further provided with a mounting block, and the side of the mounting block facing away from the side wall is provided with a limiting block, and the limiting block is arranged on the mounting block close to the One side of the top wall, the side pole piece is arranged on the side wall through the installation block, and is limited by the limit block on the side of the limit block away from the top wall. The design of the limit block can limit the position of the side 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 inner periphery of the diaphragm is connected to the voice coil, and the outer periphery is connected to the top wall, and the auxiliary diaphragm is arranged on On the side of the voice coil away from the diaphragm, one side of the auxiliary diaphragm 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 auxiliary diaphragm and the between the diaphragms. The design of the sub-diaphragm can ensure the balance of vibration and reduce swing, thereby preventing the voice coil from rolling.

In a possible design of the first aspect, the voice coil includes a top surface close to the top wall, a bottom surface close to the bottom wall, and leads for connecting with the flexible circuit board, the leads connected to the first pad. The connection between the lead wire and the first welding pad can improve the connection between the voice coil and the flexible circuit board, effectively avoiding connection failure.

A possible design of the first aspect, the diaphragm includes a first connection part, a second connection part and a sound emitting part, the first connection part is connected to the top surface, the second connection part is connected to the top surface The wall is connected, and the sound emitting part is connected to the first connecting part and the second connecting part.

In a possible design of the first aspect, the vibrating assembly further includes a spherical top, and the spherical top is attached to the first connecting portion. The design of the dome is conducive to improving 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 part is connected to a side of the washer away from the top surface. The setting of the washer can prevent the diaphragm from interfering with the flexible circuit board when vibrating.

In a possible design of the first aspect, a stopper is provided on a side of the washer close to the top surface, and the vibrating part is attached to a side of the stopper close to the top surface. The setting of the stopper further increases the barrier between the diaphragm and the flexible circuit board, preventing the diaphragm from interfering with the flexible circuit board when they vibrate.

A possible design of the first aspect, the secondary diaphragm includes a third connection part, a fourth connection part and a balance part, the third connection part is connected to the bottom surface, the fourth connection part is connected to the side The pole pieces are connected, and the balance part is connected to 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 auxiliary diaphragm arranged symmetrically in the center. The two flexible circuit boards and the auxiliary diaphragm arranged symmetrically in the center can improve the structural stability of the loudspeaker.

In a possible design of the first aspect, an avoidance groove is provided on the side pole piece, and the first welding pad is located on the avoidance groove, the balance part of the secondary diaphragm is located in the avoidance groove, and the The fourth connecting portion is connected to a side of the side pole piece that is close to the escape groove. The design of the avoidance groove can prevent the interference between the side pole piece and the secondary diaphragm when vibrating.

A possible design of the first aspect, the two first pads are located on both sides of the line, and are respectively electrically connected to the leads of the voice coil, and the side of the mounting block facing the top wall There are two third pads, and the second pads are respectively electrically connected to the third pads.

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

In a possible design of the first aspect, the frame further includes a cover plate covering the accommodating cavity, the cover plate is arranged on the top wall, and the side wall is further away from the accommodating cavity One side of the sound outlet is extended to form a sound outlet, the side of the sound outlet near the top wall is provided with a sound outlet, and the cover plate is provided with a sound outlet toward the sound outlet. The cover plate cooperates with the sound outlet, so that the sound from the speaker is transmitted outward through the sound outlet and the sound outlet.

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

A second aspect of the embodiments of the present application provides a terminal device, the terminal device is provided with the loudspeaker according to the first aspect and any possible design.

Description of drawings

Fig. 1 is a schematic structural diagram of a loudspeaker provided by 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 schematic perspective view of another angle of the speaker shown in FIG. 2 .

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

FIG. 5 is a schematic perspective view of the speaker shown in FIG. 1 without the cover plate, the diaphragm and the dome.

Description of main component symbols

speaker 100

Basin stand 10

top wall 11

bottom wall 12

Installation Department 121

side wall 13

long side wall 131

Short sidewall 132

Mounting block 133

The third pad 1331

Limit block 134

Accommodating chamber 14

Cover 15

Sound slot 151

Vocals 16

Sound 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

Edge pole piece 24

Avoidance slot 241

Lower pole piece 25

Vibration Components 30

Voice coil 31

top 311

Bottom 312

Washer 313

Stop 3131

Diaphragm 32

First connection part 321

Second connection part 322

Vocals 323

Dome 33

Secondary diaphragm 34

The third connecting part 341

Fourth connecting part 342

Balance Department 343

Flexible Circuit Board 35

Vibrator 351

First pad 3511

fixed part 352

Second pad 3521

Bending section 353

The following specific embodiments will further illustrate the present application in conjunction with the above-mentioned drawings.

Detailed ways

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, if used, the terms "first", "second", etc. are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying 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 the present application, unless otherwise specified, "plurality" means two or more. Orientation terms such as "upper", "lower", "left", and "right" are defined relative to the schematic placement of components in the drawings. It should be understood that these directional terms are relative concepts, and they are used With respect to description and clarification relative to it, it may change correspondingly according to the change of orientation of parts placed in the drawings.

In this application, if used, unless otherwise 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 integral body; it can be directly or indirectly 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 the schematic diagrams, for ease of explanation, the diagrams showing the local structure of the device will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present application.

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

As shown in FIG. 2 , the speaker 100 includes a basin frame 10 , a magnetic circuit assembly 20 and a vibration assembly 30 . The basin frame 10 is a supporting component, which is used to support and protect various components inside the speaker 100, and can install and fix the speaker 100 into electronic equipment. Both the magnetic circuit assembly 20 and the vibrating assembly 30 are 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 vibrating component 30 is used to excite a variable magnetic field through 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 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 receiving chamber 14 is formed between the side walls 13 .

The basin frame 10 further includes a cover plate 15 covering the accommodating cavity 14 . The cover 15 is disposed 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 formed on a side of the sound outlet portion 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 plate 15 cooperates with the sound output portion 16 so that the sound emitted by the speaker 100 is transmitted outward through the sound output port 161 and the sound output 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 a mounting portion 17 . An installation cavity 18 is defined between the installation portion 17 and the top wall 11 . The cover plate 15 is disposed in the installation cavity 18 .

In some embodiments, the basin frame 10 is substantially a rectangular frame structure, and the sidewall 13 is composed of two opposite long sidewalls 131 and two opposite short sidewalls 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 bottom pole piece 25 . The central magnet 21 is disposed in the accommodating cavity 14 . There are two side magnets 22 , which are arranged symmetrically 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 on a side of the center magnet 21 facing the top wall 11 . The side pole piece 24 is disposed on the side wall 13 and located on a side of the side magnet 22 facing the top wall 11 , and the two side magnets 22 are attached to the side pole pieces 24 respectively. The lower pole piece 25 is disposed on a side of the central magnet 21 and the side magnet 22 close to the bottom wall 12 . The center magnet 21 and the side magnet 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 pole and the S pole of the center magnet 21 and the side magnet 22 The loop is concentrated in the gap between the central 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 roughly a rectangle. The side magnet 22 is roughly L-shaped, and the side pole piece 24 is roughly hollow plate-shaped.

The side wall 13 is also provided with a mounting block 133 . The installation block 133 is used to limit the installation position of the side pole piece 24 . A limiting block 134 is disposed on a side of the mounting block 133 away from the side wall 13 . The limiting block 134 is disposed on a side of the mounting block 133 close to the top wall 11 , and the limiting block 134 is used to limit the installation 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 on a side of the limiting block 134 away from the top wall 11 .

In some embodiments, the central pole piece 23, the side pole piece 24 and the lower pole piece 25 are iron pieces, but not limited thereto, the central pole piece 23, the side pole piece 24 and the lower pole piece 25 can also adopt Made of magnetic 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 , an auxiliary diaphragm 34 and a flexible circuit board 35 . The voice coil 31 is sleeved on the outside of 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 magnets 22 . The voice coil 31 is used to receive an electric signal (alternating audio current), so as to be forced to move in the fixed magnetic field formed by the magnetic circuit assembly 20 . The inner circumference of the diaphragm 32 is respectively connected to the voice coil 31 , and the outer circumference is respectively connected to the top wall 11 . The diaphragm 32 is used to vibrate with the movement of the voice coil 31 to push air to produce sound. The dome 33 is attached to the inner periphery of the diaphragm 32 . The auxiliary diaphragm 34 is arranged 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 amplitude of the voice coil 31 and the diaphragm 32 is large, so as to prevent the voice coil 31 from rolling. The flexible circuit board 35 is connected to the frame 10 and the voice coil 31 , and is located between the secondary 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 a ring structure, the diaphragm 32 is roughly ring-shaped, and the dome 33 is roughly rectangular.

The voice coil 31 includes a top surface 311 close to the top wall 11 and a bottom surface 312 close 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 can move with the movement of the voice coil 31 . The second connecting portion 322 is connected to the top wall 11 . The sound emitting part 323 connects the first connecting part 321 and the second connecting part 322 . The section of the sound emitting part 323 is roughly hemispherical. The dome 33 is pasted on 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 (PEN), Polyetherimide (PEI), Polyurethane (PU), Thermoplastic Elastomer (TPE), Thermoplastic Polymer One of ester elastomer (TPEE), silicone or rubber material, and breathable mesh.

The vibrating assembly 30 includes two sub-diaphragms 34 that are symmetrical about 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 a side of the side pole piece 24 away from the mounting block 133 . The balance portion 343 connects the third connection portion 341 and the fourth connection portion 342 . The cross-section of the balance portion 343 is approximately hemispherical, and its protruding direction is opposite to that of the sound emitting portion 323 .

In some embodiments, the sub-diaphragm 34 is roughly in the shape of a long sheet, and the middle part protrudes toward one side.

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

The flexible circuit board 35 includes a vibration 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 bending portion 353 has certain elasticity.

Specifically, please refer to FIG. 5 , 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 vibrating assembly 30 includes two flexible circuit boards 35 symmetrically arranged in the center. The structures of the two flexible circuit boards 35 are the same, and the vibrating parts 351 of the two flexible circuit boards 35 are located at one corner of the voice coil 31 respectively. department. Wherein, at least one of the vibration parts 351 of the flexible circuit board 35 is provided with two first soldering pads 3511, two second soldering pads 3521 are provided on the corresponding fixed part 352, and two second soldering pads 3521 are provided on the corresponding bending part 353. There are two lines (not shown) electrically connecting the first pad 3511 and the second pad 3521 . 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 frame 10, so that external electrical signals are transmitted through the frame 10 and the flexible circuit board 35 to the voice coil 31. There is only one bending portion 353 in one flexible circuit board 35, and two lines connecting the first pad 3511 and the second pad 3521 extend side by side in the bending portion 353, so as to Make the two lines move under force at the same time when sounding, so as to prevent falling off. The two first solder pads 3511 are located at two sides of the circuit, and are respectively electrically connected to the lead wires (not shown) of the voice coil 31 by welding. Two third welding pads 1331 are provided on a side of the mounting block 133 on a corner of the basin frame 10 facing the top wall 11 . The second pads 3521 are electrically connected to the third pads 1331 by soldering.

The washer 313 is provided with a stopper 3131 on the side close to the top surface 311, and the vibrating part 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 with the voice coil 31. The stopper 3131 is used to limit the position of the vibrating part 351 to prevent interference during vibration due to the close location of the flexible circuit board 35 and the diaphragm 32 .

An internal circuit 19 is also provided in the pot frame 10 . One side of the internal 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 with an external circuit.

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

The two centrally symmetrical flexible circuit boards 35 are located on the short side walls 132, and the two centrally symmetrical corners of the side pole piece 24 relative to the basin frame 10 are provided with avoidance grooves 241, and the first welding pad 3511 is located at the corner of the avoidance groove 241, the balance part 343 of the secondary diaphragm 34 is located in the avoidance groove 241, and the fourth connecting part 342 is connected to the side pole piece 24 close to the avoidance 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 secondary diaphragm 34 .

The two corners of the bottom wall 12 also protrude outwards with installation parts 121 , and the side magnet 22 and the lower pole piece 25 are designed with avoidance parts 221 and 251 at corresponding positions to avoid the installation part 121 .

The vibration part 351 is adapted to the shape of the washer 313 of the voice coil 31, and is pasted on the washer 313 by bonding, and the top surface 311 of the voice coil 31 is bonded to the washer 313, so as to When the voice coil 31 is moved, there is no relative movement between the vibrating part 351 and the voice coil 31 , which prevents the welding point between the first pad 3511 and the lead from falling off. The fixing part 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 part 352 is stably connected to the mounting block 133. On the pot frame 10.

Since 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 corresponding winding length L of the voice coil 31, when the voice coil 31 is loaded with a voltage and generates a current i, can The generated driving force is F, where F=BLi, where BL is called the power conversion coefficient.

The speaker 100, by designing two side-by-side dual-channel circuit structures on a flexible circuit board 35, makes the positive and negative electrodes both pass through the two first pads 3511 of the vibrating part 351 of a flexible circuit board 35, and pass through the basin The internal circuit 19 in the frame 10 is drawn out to a corner of the pot frame 10, so that when the pot frame 10 communicates with the flexible circuit board 35, there is no need to connect the two corners of the pot frame 10, and only one corner needs to connect the 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 dimensions of the speaker 100 can be 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. , thereby improving the power conversion coefficient of the speaker 100, thereby increasing the loudspeaker capability of the speaker 100 and obtaining better sound effects.

The present application is not limited to the central symmetrical design of the flexible circuit board 35 and the secondary diaphragm 34 . 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. Wherein, 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 connection between the voice coil 31 and a corner of the frame 10 is realized. The circuit is connected. Correspondingly, four auxiliary diaphragms 34 are designed on the four corners of the frame 10 , and the magnetic circuit assembly 20 is correspondingly designed with four side magnets 22 .

In the illustrated embodiment, the loudspeaker 100 has a rectangular shape for illustration, but it should be understood that the loudspeaker 100 may also have regular or irregular shapes such as spheres, cylinders, and cubes. 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 assembly 20 and the vibration assembly 30 included in the speaker 100 can be adjusted accordingly according to the shape of the speaker 100. .

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

The terminal device can 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 is only a specific implementation of the application, but the protection scope of the application is not limited thereto, and any changes or replacements within the technical scope disclosed in the application should be covered within the disclosure scope of the application .

Claims (19)

1. A loudspeaker, comprising a basin frame, a magnetic circuit assembly and a vibration assembly, the magnetic circuit assembly and the vibration assembly are all 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 vibrating part, a fixing part and a bending part, and the vibrating part is connected to the voice coil , the fixing part is connected to the frame, the bending part is connected to the vibrating part and the fixing part, two first pads are arranged on the vibrating part, and on the corresponding fixing parts There are two second pads, and two lines electrically connecting the first pad and the second pad are provided on the corresponding bent portion, and the first pad is used to communicate with the The voice coil is electrically connected, the second pad is used to connect with the basin frame, there is only one bending part in one flexible circuit board, and the two lines are in the bending part Extending side by side, one corner of the frame is provided with two third pads, one of the third pads is electrically connected to one of the second pads, and the other third pad is electrically connected to the other the second pad. 2. The loudspeaker according to 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, so An accommodating cavity is formed between the side walls, and the voice coil is arranged in the accommodating cavity. 3. The loudspeaker according to 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, and the central magnet is arranged in the accommodating cavity wherein, the side magnet is set on one side of the center magnet, there is a gap between the side magnet and the center magnet, the voice coil is set outside the center magnet, and the voice coil is set on the In the gap, the center pole piece is attached to the side of the center magnet facing the top wall, and the side pole pieces are arranged on the side wall and located on the side of the side magnet facing the top wall , the lower pole piece is arranged on the side of the central magnet and the side magnet close to the bottom wall. 4 . The loudspeaker according to claim 3 , wherein there are two side magnets, which are symmetrically arranged on both sides of the central magnet. 5. The loudspeaker according to claim 3, wherein a mounting block is further provided on the side wall, and a limiting block is provided on a side of the mounting block away from the side wall, and the limiting block is arranged on 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 so that the limiting block is away from the top wall side. 6. The loudspeaker according to claim 3, wherein the vibrating assembly further comprises a diaphragm and a sub-diaphragm, the inner periphery of the diaphragm is connected to the voice coil, and the outer periphery is connected to the top wall, so The auxiliary diaphragm is arranged on the side of the voice coil away from the diaphragm, one side of the auxiliary diaphragm is connected to the voice coil, and the other side is connected to the side pole piece, and the flexible circuit board is located on Between the secondary diaphragm and the diaphragm. 7. The loudspeaker according to claim 6, wherein the voice coil comprises a top surface close to the top wall, a bottom surface close to the bottom wall and a flexible circuit board for connection leads, and the leads are connected to the first pad. 8. The loudspeaker according to claim 7, wherein the diaphragm comprises a first connecting portion, a second connecting portion and a sound emitting portion, the first connecting portion is connected to the top surface, and the second connecting portion The connection part is connected to the top wall, and the sound emitting part is connected to the first connection part and the second connection part. 9. The loudspeaker according to claim 8, wherein the vibrating assembly further comprises a dome, and the dome is adhered to the first connecting portion. 10. The loudspeaker according to claim 8, wherein the voice coil further comprises a washer, the washer is arranged on the top surface, and the first connection part and the washer are away from the top surface Connect on one side. 11. The loudspeaker according to claim 10, wherein a stopper is provided on the side of the washer close to the top surface, and the vibrating part is attached to the side of the stopper close to the top surface . 12. The loudspeaker according to claim 7, wherein the secondary diaphragm comprises a third connecting portion, a fourth connecting portion and a balance portion, the third connecting portion is connected to the bottom surface, and the fourth connecting portion The connection part is connected to the side pole piece, and the balance part is connected to the third connection part and the fourth connection part. 13. The loudspeaker according to claim 12, wherein the vibrating component comprises two flexible circuit boards and the auxiliary diaphragm arranged symmetrically in the center. 14. The loudspeaker according to claim 12, wherein an avoidance groove is provided on the side pole piece, and the first welding pad is located on the avoidance groove, and the balance part of the secondary diaphragm is located on the The avoidance groove, and the fourth connecting portion is connected to the side of the side pole piece close to the avoidance groove. 15. The loudspeaker according to claim 5, wherein the two first pads are located on both sides of the line, and are respectively electrically connected to the leads of the voice coil, and the third pads Located on a side of the mounting block facing the top wall, the second pads are respectively electrically connected to the third pads. 16 . The loudspeaker according to claim 15 , wherein an internal circuit is further provided in the frame, one side of the internal circuit is connected to the third pad, and the other side extends toward the bottom wall. 17 . 17. 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 wall also faces The side away from the accommodating cavity extends to form a sound outlet, the side of the sound outlet near the top wall is provided with a sound outlet, and the cover plate is provided with a sound outlet facing the sound outlet . 18. The loudspeaker according to claim 17, wherein the side of the top wall away from the accommodating cavity extends in a direction away from the bottom wall to form a mounting portion, and the mounting portion is connected to the An installation cavity is enclosed between the top walls, and the cover plate is arranged in the installation cavity. 19. A terminal device, characterized in that the terminal device is provided with the loudspeaker according to any one of claims 1-18.

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