CN214413036U

CN214413036U - Speaker and terminal device

Info

Publication number: CN214413036U
Application number: CN202023351623.3U
Authority: CN
Inventors: 刘金华; 朱统; 黎椿键; 闫涛; 刘卫
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-10-15
Anticipated expiration: 2030-12-30

Abstract

A loudspeaker comprises a basin frame, a magnetic circuit assembly and a vibration assembly, wherein the magnetic circuit assembly and the vibration assembly are arranged on the basin frame, the basin frame comprises a top wall, a bottom wall and side walls, the bottom wall is arranged opposite to the top wall, the side walls are connected with the top wall and the bottom wall, and an accommodating cavity is defined between the side walls; the vibration component comprises a voice coil, a vibrating diaphragm, an auxiliary vibrating diaphragm and a flexible circuit board, wherein the voice coil is arranged in the accommodating cavity, the inner periphery of the vibrating diaphragm is connected with the voice coil, the outer periphery of the vibrating diaphragm is connected with the top wall, the auxiliary vibrating diaphragm is arranged on one surface of the voice coil, which is far away from the vibrating diaphragm, one side of the auxiliary vibrating diaphragm is connected with the voice coil, the other side of the auxiliary vibrating diaphragm is connected with the bottom wall, and the flexible circuit board is connected with the basin frame and the voice coil and is positioned on one side of the auxiliary vibrating diaphragm, which is far away from the vibrating diaphragm; the flexible circuit board is provided with a first bonding pad, the first bonding pad is used for being electrically connected with the voice coil, and the first bonding pad is located in a projection plane of the secondary vibrating diaphragm from the top wall to the bottom wall in the projection direction. The interference of the secondary vibrating diaphragm with the flexible circuit board and the magnetic circuit assembly is avoided when the secondary vibrating diaphragm vibrates; and the magnetic circuit is avoided, so that the area and the volume of the magnetic circuit component are increased, and the outward playing effect of the loudspeaker is improved.

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 multiple 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 play performance and a more and more compact spatial structure. People's requirements for 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 audio related devices.

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 an electrified circuit inside the loudspeaker under large amplitude, the electrified circuit inside the loudspeaker is usually designed to be of 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. Usually, the position of the inner side bonding pad not only needs to keep a certain gap with a loudspeaker magnet to ensure that the bonding pad does not vibrate with a magnetic circuit to interfere with the bonding pad, but also needs to keep a certain distance with an auxiliary vibrating diaphragm of the loudspeaker to ensure that the welding of the voice coil and the bonding pad can be implemented. Because the auxiliary diaphragm system and the inner side bonding pad of the flexible circuit board all occupy the area of the loudspeaker, the area of the magnetic circuit inside the loudspeaker is limited, so that the driving capacity of the loudspeaker is reduced, and the outward-playing effect is poor.

SUMMERY OF THE UTILITY MODEL

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, including a frame, a magnetic circuit component and a vibration component, where the magnetic circuit component and the vibration component are both disposed on the frame, the frame includes a top wall, a bottom wall disposed opposite to the top wall, and side walls connecting the top wall and the bottom wall, and an accommodating cavity is defined between the side walls; the vibration component comprises a voice coil, a vibration diaphragm, an auxiliary vibration diaphragm and a flexible circuit board, the voice coil is arranged in the accommodating cavity, the inner periphery of the vibration diaphragm is connected with the voice coil, the outer periphery of the vibration diaphragm is connected with the top wall, the auxiliary vibration diaphragm is arranged on one surface of the voice coil, which is far away from the vibration diaphragm, one side of the auxiliary vibration diaphragm is connected with the voice coil, the other side of the auxiliary vibration diaphragm is connected with the bottom wall, and the flexible circuit board is connected with the basin frame and the voice coil and is positioned on one side of the auxiliary vibration diaphragm, which is far away from the vibration diaphragm; the flexible circuit board is provided with a first bonding pad, the first bonding pad is used for being electrically connected with the voice coil, and the first bonding pad is located in a projection plane of the secondary diaphragm from the top wall to the bottom wall in the projection direction.

The loudspeaker has the advantages that the flexible circuit board is arranged below the secondary vibrating diaphragm, which is far away from the vibrating diaphragm, so that the secondary vibrating diaphragm is prevented from interfering with the flexible circuit board and the magnetic circuit assembly when vibrating; the first bonding pad of the flexible circuit board is designed in the projection surface of the auxiliary vibrating diaphragm to avoid a magnetic circuit, so that the area and the volume of a magnetic circuit component of the loudspeaker can be increased, the magnetic induction intensity generated by the magnetic circuit component is increased, the power transduction coefficient of the loudspeaker is improved, the driving force under the same current is improved, and the external playing effect of the loudspeaker is improved.

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 ball top, and the ball top is attached to the first connection portion of the vibration film. The design of the dome is beneficial to improving the tone quality of the loudspeaker.

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 bottom wall, 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 sound-emitting portion has a hemispherical cross section, the balance portion has a hemispherical cross section, and the protruding direction of the balance portion is the same as the protruding direction of the sound-emitting portion. The design of the same orientation is beneficial to saving the inner space of the loudspeaker.

In one possible embodiment of the first aspect, one side of the flexible printed circuit board is connected to the bottom surface, and the other side is connected to the bottom wall. The bottom surface and diapire are connected to the flexible circuit board, can support the voice coil loudspeaker voice coil, avoid the voice coil loudspeaker voice coil incline.

In a possible design of the first aspect, the flexible circuit board includes a vibrating portion, a fixing portion, and a bending portion, the vibrating portion is connected to the bottom surface, the fixing portion is connected to the bottom wall, and the bending portion is connected to the vibrating portion and the fixing portion.

A possible design of the first aspect, the vibration subassembly includes two flexible circuit boards that centrosymmetric set up and the secondary vibrating diaphragm, two the flexible circuit board is located one of them respectively the secondary vibrating diaphragm is kept away from one side of vibrating diaphragm, set up on the bottom surface of voice coil loudspeaker voice coil the lead wire, be equipped with on the vibration portion of flexible circuit board first pad is corresponding be equipped with the second pad on the fixed part, first pad with the second pad electricity is connected, the second pad is used for being connected with external circuit. Two flexible circuit boards that centrosymmetric set up reach the secondary diaphragm can improve the structural stability of speaker, sets up first pad on the vibration portion for the welding department can remove along with the voice coil loudspeaker voice coil and prevent that the solder joint from dropping.

In one possible embodiment of the first aspect, the third connecting portion is bonded to the bottom surface, and the fourth connecting portion is bonded to the bottom wall. The secondary vibrating diaphragm is connected with the voice coil and the basin frame, so that the structural stability of the loudspeaker can be improved.

In one possible design of the first aspect, the third connecting portion is bonded to the vibrating portion, and the fourth connecting portion is bonded to the fixing portion. The secondary vibrating diaphragm is connected to the flexible circuit board, so that the secondary vibrating diaphragm and the flexible circuit board can be assembled conveniently, and the assembling efficiency is improved.

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 a possible design of the first aspect, a limiting block is disposed on the sidewall, and the side pole piece is disposed on the sidewall through the limiting block. The design of the limiting block can limit the position of the edge pole piece in the basin frame.

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 one possible design of the first aspect, the side magnet is located in a projection range of a projection direction of the side pole piece from the top wall to the bottom wall. The edge magnet is positioned in the projection of the edge pole piece and is powerful in conducting magnetic conduction on the edge magnet.

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 speaker shown in fig. 1.

Fig. 5 is a perspective view of the speaker of fig. 1 with the lower pole piece removed.

Description of the main elements

Loudspeaker 100

Basin stand 10

Roof wall 11

Bottom wall 12

Side wall 13

Long side wall 131

Short side wall 132

Stopper 133

Accommodating chamber 14

Mounting portion 15

Magnetic circuit assembly 20

Center magnet 21

Edge magnet 22

Avoidance parts

221, 251

Central pole piece 23

Edge pole piece 24

Lower pole piece 25

Vibration assembly 30

Voice coil 31

Top surface 311

Bottom surface 312

Lead 313

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

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.

The speaker 100 includes a frame 10, a magnetic circuit assembly 20, and a vibration assembly 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.

As shown in fig. 2 and 3, the 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 defined between the side walls 13.

In some embodiments, the side walls 13 are perpendicular to the top wall 11 and the bottom wall 12, respectively. 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 exists 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 positioned in the projection range of the side pole piece 24 in the projection direction from the top wall 11 to the bottom wall 12. 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 limiting block 133. The side pole piece 24 is disposed on the side wall 13 through the limiting block 133.

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 sound. The dome 33 is attached to the inner periphery of the diaphragm 32. The sub-diaphragm 34 is disposed on a surface of the voice coil 31 far away from the diaphragm 32, one side of the sub-diaphragm 34 is connected to the voice coil 31, and the other side is connected to the bottom wall 12. 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 on a side of the sub-diaphragm 34 away from 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 near the top wall 11, a bottom surface 312 near the bottom wall 12, and a lead 313 for connecting with the flexible circuit board 35.

The diaphragm 32 includes a first connecting portion 321, a second connecting portion 322, and a sound-emitting portion 323. The first connection portion 321 is connected to the top surface 311. The second connecting portion 322 is connected to the top wall 11. The sound emitting part 323 connects the first connection part 321 and the second connection part 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 of the 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 the bottom wall 12. The balance portion 343 connects the third connection portion 341 and the fourth connection portion 342. The balance portion 343 has a substantially hemispherical shape in cross section, and has a protruding direction identical to that of the sound generating portion 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 bottom surface 312 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 bottom wall 12 of the frame 10 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.

Referring to fig. 5, the vibration assembly 30 includes two flexible circuit boards 35 disposed in a central symmetry manner, and the two flexible circuit boards 35 have the same structure and are respectively located on one side of one of the sub-diaphragms 34 away from the diaphragm 32. A first bonding pad 3511 is disposed on the vibrating portion 351 of at least one of the flexible circuit boards 35, a second bonding pad (not shown) is disposed on the corresponding fixing portion 352, and a circuit (not shown) electrically connecting the first bonding pad 3511 and the second bonding pad is disposed on the corresponding bending portion 353. The first pad 3511 is used for electrical connection with the voice coil 31, and the second pad is used for connection with an external circuit, so that an external electrical signal is transmitted to the voice coil 31 through the flexible circuit board 35. The lead 313 and the first pad 3511 are electrically connected by welding, and the first pad 3511 and the welding point are located in a projection plane of the sub-diaphragm 34 in a projection direction from the top wall 11 to the bottom wall 12.

Two lead wires 313 are arranged on one side of the bottom surface 312 of the voice coil 31, two first bonding pads 3511 are arranged on the flexible circuit board 35 corresponding to the lead wires 313, and the lead wires 313 are respectively connected with the first bonding pads 3511.

Two the flexible circuit board 35 and the sub-diaphragm 34 are relatively disposed at two corners of the basin stand 10, and are located on the bottom wall 12 connected to the short side wall 132, the long sides of the two L-shaped side magnets 22 are disposed on the bottom wall 12 connected to the long side wall 131, and the short sides are retracted from the flexible circuit board 35 and the sub-diaphragm 34.

In other embodiments, the U-shaped edge magnet 22 may be designed to recede from the flexible circuit board 35 disposed at the corner, so that the area and volume of the edge magnet 22 are further increased on the basis of the edge magnet 22, and the magnetic induction intensity of the magnetic circuit assembly 20 is further increased.

Two bights of diapire 12 still outwards bulge and are equipped with installation department 15, limit magnet 22 and lower pole piece 25 are in corresponding position design dodge portion 221 and dodge portion 251, dodge installation department 15.

The vibrating portion 351 is adapted to the shape of the bottom surface 312 of the voice coil 31 and is adhesively disposed on the bottom surface 312 of the voice coil 31, 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 is prevented from dropping off. The fixing portion 352 corresponds to the bottom wall 12 in shape, and is adhesively disposed on the bottom wall 12, so that the fixing portion 352 is stably connected to the bottom wall 12.

The third connection portion 341 of the sub-diaphragm 34 is directly bonded to the bottom surface 312 of the voice coil 31, and the fourth connection portion 342 of the sub-diaphragm 34 is directly bonded to the bottom wall 12. But not limited thereto, the third connection portion 341 of the sub-diaphragm 34 may be further bonded to the vibration portion 351 of the flexible circuit board 35, and the fourth connection portion 342 of the sub-diaphragm 34 may be further bonded to the fixing portion 352 of the flexible circuit board 35.

The vibrating portion 351 of the flexible circuit board 35 may be directly bonded to the bottom surface 312 of the voice coil 31, or may be an extended support structure such that the flexible circuit board 35 is not higher than the bottom surface 312 of the voice coil 31, so that the voice coil 31 may have a larger amplitude space.

When assembling the vibration assembly 30, the voice coil 31 and the flexible circuit board 35 are assembled together, and then the glue is applied for bonding, the lead 313 of the voice coil 31 is straightened and welded with the first bonding pad 3511 of the flexible circuit board 35, and then the glue is applied for protecting the welding point, and then the assembly is turned over, the sub-diaphragm 34 is assembled on the voice coil 31 and the flexible circuit board 35, and the glue is applied for bonding, and then the redundant sub-diaphragm 34 is removed by laser, and finally the diaphragm 32 is attached to the other side of the voice coil 31, the dome 33 is attached to the diaphragm 32, and the remaining components of the speaker 100 are assembled.

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.

In the loudspeaker 100, the flexible circuit board 35 is arranged below the sub-diaphragm 34 away from the diaphragm 32, so that the bending direction of the sub-diaphragm 34 is the same as that of the diaphragm 32, thereby preventing the sub-diaphragm 34 from interfering with the flexible circuit board 35 and the lower pole piece 25 during vibration; the welding point design of the first welding disc 3511 of the flexible circuit board 35 is arranged in the projection surface of the secondary vibrating diaphragm 34 from the top wall 11 to the projection direction of the bottom wall 12, a magnetic circuit is avoided, the area and the volume of the side magnet 22 in the magnetic circuit component 20 of the loudspeaker 100 can be increased, the magnetic induction intensity B generated by the magnetic circuit component 20 is increased, the electric power transduction coefficient of the loudspeaker 100 is improved, the driving force under the same current is improved, and the external playing effect of the loudspeaker is improved.

In other embodiments, the assembly of the speaker 100 may be performed by first bonding the sub-diaphragm 34 to the flexible circuit board 35, and then bonding the flexible circuit board 35 to the voice coil 31 and soldering the flexible circuit board 35. At this time, the connection relationship of the voice coil 31, the sub-diaphragm 34, and the flexible circuit board 35 in the vibration assembly 30 of the speaker 100 is different from the above-described assembly. The vibration portion 351 of the flexible circuit board 35 has a larger width than the vibration portion 351 in the above-described assembly method, the third connection portion 341 of the sub-diaphragm 34 is bonded to the vibration portion 351 of the flexible circuit board 35, and the third connection portion 341 is bonded to the vibration portion 351 with a larger width, and can support the bonding point between the first pad 3511 and the lead 313.

During assembly, the flexible circuit board 35 and the sub-diaphragm 34 are assembled together, adhesive dispensing is performed, the third connecting portion 341 is bonded to the vibrating portion 351, the voice coil 31 is assembled on the sub-diaphragm 34 and the flexible circuit board 35, the vibrating portion 351 is bonded to the bottom surface 312 through adhesive dispensing, the voice coil 31 is turned over, the lead 313 of the voice coil 31 is welded to the first bonding pad 3511 of the flexible circuit board 35 and protected by adhesive dispensing, and finally the rest parts of the loudspeaker 100 are assembled.

The present application is not limited to the flexible circuit board 35 and the sub-diaphragm 34 of the centrosymmetric design. It is understood that in other embodiments, the flexible circuit boards 35 of the vibration assembly 30 may be designed to be four, four flexible circuit boards 35 are respectively located on four corners of the frame 10, wherein at least two flexible circuit boards 35 are provided with the first pads 3511 and the wires, and two of the first pads 3511 are soldered to the voice coil 31 to electrically connect the voice coil 31 to the flexible circuit boards 35; four sub-diaphragms 34 are correspondingly designed on four corners of the frame 10, and the first pads 3511 on the flexible circuit board 35 are positioned in the projection plane of the corresponding sub-diaphragms 34 in the projection direction from the top wall 11 to the bottom wall 12; the magnetic circuit assembly 20 is correspondingly 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 basin frame comprises a top wall, a bottom wall and side walls, wherein the bottom wall is arranged opposite to the top wall, the side walls are used for connecting the top wall and the bottom wall, and an accommodating cavity is defined between the side walls;

the vibration component comprises a voice coil, a vibration diaphragm, an auxiliary vibration diaphragm and a flexible circuit board, the voice coil is arranged in the accommodating cavity, the inner periphery of the vibration diaphragm is connected with the voice coil, the outer periphery of the vibration diaphragm is connected with the top wall, the auxiliary vibration diaphragm is arranged on one surface of the voice coil, which is far away from the vibration diaphragm, one side of the auxiliary vibration diaphragm is connected with the voice coil, the other side of the auxiliary vibration diaphragm is connected with the bottom wall, and the flexible circuit board is connected with the basin frame and the voice coil and is positioned on one side of the auxiliary vibration diaphragm, which is far away from the vibration diaphragm;

the flexible circuit board is provided with a first bonding pad, the first bonding pad is used for being electrically connected with the voice coil, and the first bonding pad is located in a projection plane of the secondary diaphragm from the top wall to the bottom wall in the projection direction.

2. The speaker of claim 1, 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.

3. The loudspeaker of claim 2, 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.

4. The loudspeaker of claim 2, wherein the vibration assembly further comprises a dome attached to the first connection of the diaphragm.

5. The loudspeaker of claim 3, 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 bottom wall, the balance portion connecting the third connecting portion and the fourth connecting portion.

6. The speaker of claim 5, wherein the sound-emitting portion has a hemispherical shape in cross section, and the balance portion has a hemispherical shape in cross section and a convex direction in the same direction as the convex direction of the sound-emitting portion.

7. The loudspeaker of claim 5, wherein one side of the flexible circuit board is connected to the bottom surface and the other side is connected to the bottom wall.

8. The loudspeaker of claim 7, wherein the flexible circuit board includes a vibrating portion, a fixing portion, and a bending portion, the vibrating portion being connected to the bottom surface, the fixing portion being connected to the bottom wall, the bending portion connecting the vibrating portion and the fixing portion.

9. The loudspeaker of claim 8, wherein the vibration assembly comprises two flexible circuit boards and the sub-diaphragms, the two flexible circuit boards are arranged in a central symmetry manner, the two flexible circuit boards are respectively arranged on one side of one of the sub-diaphragms away from the diaphragm, the leads are arranged on the bottom surfaces of the voice coils, the vibration parts of the flexible circuit boards are provided with the first bonding pads, the corresponding fixing parts are provided with second bonding pads, the first bonding pads are electrically connected with the second bonding pads, and the second bonding pads are used for being connected with an external circuit.

10. The loudspeaker of claim 8 wherein said third connector is bonded to said bottom wall and said fourth connector is bonded to said bottom wall.

11. The speaker of claim 8, wherein said third connecting portion is bonded to said vibrating portion and said fourth connecting portion is bonded to said fixing portion.

12. The loudspeaker of claim 1, 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.

13. The loudspeaker of claim 12, wherein a stop block is disposed on the sidewall, and the side pole piece is disposed on the sidewall through the stop block.

14. The speaker of claim 12, wherein the two side magnets are disposed symmetrically on both sides of the center magnet.

15. The loudspeaker of claim 12, wherein said side magnet is located within a projection of said side pole piece in a direction from said top wall to said bottom wall.

16. A terminal device, characterized in that the terminal device is provided with a loudspeaker according to any one of claims 1-15.