CN115460523A

CN115460523A - Sound production device and electronic equipment

Info

Publication number: CN115460523A
Application number: CN202211347856.7A
Authority: CN
Inventors: 蔡晓东; 刘松
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2022-12-09

Abstract

The invention discloses a sound generating device and electronic equipment, wherein the sound generating device comprises a shell, a magnetic circuit system and a vibration system, the shell is a metal piece, the shell is provided with a containing cavity, the shell is also provided with a supporting arm positioned in the containing cavity, the magnetic circuit system is connected with the shell and positioned in the containing cavity, the magnetic circuit system is provided with a magnetic gap, the supporting arm is positioned at the outer side of the magnetic gap, the vibration system comprises a vibrating diaphragm and a voice coil, the vibrating diaphragm is connected with the shell and is opposite to and spaced from the magnetic circuit system, one end of the voice coil is connected with the vibrating diaphragm, the other end of the voice coil is suspended in the magnetic gap, the voice coil is provided with a lead wire, and the lead wire is guided from the magnetic gap to the supporting arm and is supported on the supporting arm. The invention aims to provide the sound generating device which is convenient to process and assemble and reduces the cost.

Description

Sound production device and electronic equipment

Technical Field

The invention relates to the technical field of electroacoustic conversion, in particular to a sound generating device and electronic equipment using the same.

Background

With the development of the portable consumer electronics market, the miniature sound generator is widely applied, and with the multifunctional and miniaturized design of the portable terminal electronics, higher requirements are put forward on the vibration acoustic performance of the miniature sound generator.

The sound production device generally comprises a shell, and a magnetic circuit system and a vibration system which are contained in the shell, wherein the shell is generally made of an injection molding piece or integrally injection-molded by a metal conductive piece and a plastic piece, so that the whole structure is large, the processing is complex, and the production cost is high. Simultaneously, vibration system includes the vibrating diaphragm and combines the voice coil loudspeaker voice coil on one side of the vibrating diaphragm, and the lead wire of voice coil loudspeaker voice coil generally switches on with external circuit through centering branch piece or other electrically conductive pieces to make the voice coil loudspeaker voice coil of circular telegram can drive the vibrating diaphragm and take place the vibration under magnetic circuit's effect, and then realize sound generating mechanism's sound production. However, the lead of the voice coil is usually electrically conductive in a suspension lead manner, and the risk of wire breakage is easily caused.

Disclosure of Invention

The invention mainly aims to provide a sound generating device and electronic equipment, and aims to provide the sound generating device which is convenient to process and assemble and reduces the cost.

In order to achieve the above object, the present invention provides a sound generating device, including:

the shell is a metal piece, the shell is provided with a containing cavity, and the shell is also provided with a supporting arm positioned in the containing cavity;

the magnetic circuit system is connected to the shell and positioned in the cavity, a magnetic gap is formed in the magnetic circuit system, and the supporting arm is positioned on the outer side of the magnetic gap; and

the vibration system comprises a vibrating diaphragm and a voice coil, the vibrating diaphragm is connected to the shell and is opposite to and spaced from the magnetic circuit system, one end of the voice coil is connected with the vibrating diaphragm, the other end of the voice coil is suspended in the magnetic gap, the voice coil is provided with a lead, and the lead is guided to the supporting arm from the magnetic gap and is supported on the supporting arm.

In one embodiment, the housing comprises a straight wall and a vertical wall, the straight wall is formed by bending and extending the straight wall, the straight wall and the vertical wall enclose a cavity, the support arm is formed by bending and extending the vertical wall towards the cavity, and the straight walls are opposite and spaced;

the magnetic circuit system is provided with a vertical part positioned in the accommodating cavity, the vertical part is positioned on the inner side of the vertical wall and is spaced from the vertical wall to form a wiring cavity in a matched mode, and the supporting arm is positioned in the wiring cavity;

the lead is guided into the routing cavity from the magnetic gap and is supported by the supporting arm.

In one embodiment, the support arm comprises a platform part and an inclined part which are connected, the platform part is connected with the vertical wall, and the inclined part extends from the platform part towards the routing cavity in an inclined mode;

the sound production device further comprises a conductive piece, the conductive piece is arranged on the platform part, and the lead is supported on the supporting arm and connected with the conductive piece.

In one embodiment, the distance from the inclined portion to the flat wall is gradually reduced from one end adjacent to the platform portion to one end far away from the platform portion;

and/or one end of the lead wire, which is adjacent to the conductive piece, is connected with the inclined part through a glue layer, and the glue layer is damping glue;

and/or the conductive member is a FPCB.

In one embodiment, the voice coil has a long axis side and a short axis side connected end to end;

the number of the lead wires is two, and each lead wire is arranged corresponding to one long shaft side;

the vertical wall is bent and extended corresponding to each long shaft side to form the supporting arm, and the vertical part and the vertical wall are corresponding to each long shaft side to form the routing cavity;

each lead is guided to one of the routing cavities from the magnetic gap and is supported by one of the supporting arms.

In one embodiment, the magnetic circuit system comprises:

the magnetic conduction yoke comprises a bottom and the vertical part arranged on the periphery of the bottom, and the vertical part and the bottom enclose to form an accommodating groove; and

a central magnetic path portion disposed in the receiving slot and spaced from the vertical portion to form the magnetic gap.

In an embodiment, the vertical portions include a plurality of vertical portions, the vertical portions are arranged at intervals along the bottom peripheral edge, a communication gap is formed between two adjacent vertical portions, and the routing cavity is communicated with the magnetic gap through the communication gap.

In an embodiment, the magnetic yoke further includes a positioning portion, the positioning portion is formed by bending and extending one side of the vertical portion corresponding to the short axis side towards the direction away from the accommodating groove, and the positioning portion is abutted and limited with the vertical wall.

In an embodiment, the vertical wall is further provided with a positioning notch corresponding to the short shaft edge, the positioning part is convexly provided with a positioning protrusion corresponding to the positioning notch, and the positioning protrusion is accommodated and limited in the positioning notch;

and/or one side of the straight wall corresponding to the short shaft edge is bent and extended towards the containing cavity to form a positioning table, and the positioning table is abutted and positioned with the positioning part.

In an embodiment, the magnetic yoke further includes a covering portion, the covering portion is formed by bending and extending a side of the vertical portion corresponding to the long axis edge, the covering portion is opposite to the vertical wall and spaced apart from the vertical wall, so that the vertical wall, the covering portion and the vertical portion enclose the wiring cavity, and the supporting arm is located between the vertical wall and the covering portion.

In one embodiment, one side of the covering part, which is far away from the vertical part, is bent towards the straight wall to form a positioning boss, and the positioning boss is abutted with the supporting arm for positioning;

and/or, the casing still includes the limiting wall, the limiting wall by the straight wall correspond one side orientation on major axis limit the line intracavity is buckled to extend and is formed, the limiting wall with vertical wall interval and relative, and be the dislocation set with the support arm, the limiting wall, straight wall and vertical wall enclose to close and form the spacing groove, the lead wire follows guide in the magnetic gap to in the spacing groove, and support in on the support arm.

The invention also provides electronic equipment which comprises an equipment shell and the sound generating device, wherein the sound generating device is arranged on the equipment shell.

According to the sound production device, the shell is arranged as the metal piece, the metal piece is punched and formed into the shell, the processing steps of the shell are effectively simplified, the cost is reduced, the magnetic circuit system and the vibration system are arranged on the shell through the arrangement of the containing cavity in the shell, the installation stability of the magnetic circuit system and the vibration system is improved, the magnetic gap is formed in the magnetic circuit system, the vibration diaphragm of the vibration system is connected to the shell and opposite to and spaced from the magnetic circuit system to form the vibration space in a surrounding mode, one end of the voice coil is connected with the vibration diaphragm, the other end of the voice coil is suspended in the magnetic gap, current is introduced into the voice coil, the current is introduced into the magnetic field formed by the magnetic circuit system through the voice coil, and the voice coil drives the vibration diaphragm to vibrate and produce sound under the action of the magnetic circuit system. Further through set up the support arm that is located the appearance intracavity on the casing, so connect in the casing at magnetic circuit to when being located the appearance intracavity, make the support arm be located the outside in magnetic gap, thereby guide the lead wire of voice coil loudspeaker voice coil to the support arm in the magnetic gap, and support in the support arm, thereby avoid the lead wire of voice coil loudspeaker voice coil to take place to split at voice coil loudspeaker voice coil vibration in-process, improve the connection stability of voice coil loudspeaker voice coil lead wire, avoid the voice coil loudspeaker voice coil lead wire to take place the broken string risk simultaneously.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a sound generating device according to an embodiment of the present invention;

fig. 2 is a schematic structural view of another view angle of the sound generating device according to an embodiment of the present invention;

FIG. 3 is an exploded view of the sound generator according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of a sound generating device along a short axis according to an embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view of a sound generator along a long axis in an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a housing according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a magnetic yoke according to an embodiment of the invention.

The reference numbers illustrate:

the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all directional indicators (such as up, down, left, right, front, and back \8230;) in the embodiments of the present invention are only used to explain the relative positional relationship between the components, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indicators are changed accordingly.

Also, the meaning of "and/or" and/or "appearing throughout is meant to encompass three scenarios, exemplified by" A and/or B "including scenario A, or scenario B, or scenarios where both A and B are satisfied.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The sound production device generally comprises a shell, and a magnetic circuit system and a vibration system which are contained in the shell, wherein the shell is generally made of an injection molding piece or integrally injection-molded by a metal conductive piece and a plastic piece, so that the whole structure is large, the processing is complex, and the production cost is high. Simultaneously, vibration system includes the vibrating diaphragm and combines the voice coil loudspeaker voice coil on one side of the vibrating diaphragm, and the lead wire of voice coil loudspeaker voice coil usually switches on with external circuit through centering branch piece or other electrically conductive pieces to make the voice coil loudspeaker voice coil of circular telegram can drive the vibrating diaphragm and take place the vibration under magnetic circuit's effect, and then realize sound generating mechanism's sound production. However, the lead of the voice coil is usually guided to the housing by using a flying lead and connected to the conductive member, which is prone to wire breakage.

Based on the above concepts and problems, the present invention provides a sound generating device 100. It is understood that the sound generating apparatus 100 is applied to an electronic device, and the electronic device may be a mobile phone, a sound box, a computer, an earphone, a watch, a television, or the like, and is not limited herein.

Referring to fig. 1 to 7, in an embodiment of the present invention, the sound generating device 100 includes a housing 1, a magnetic circuit system 2, and a vibration system 3, where the housing 1 is a metal component, the housing 1 has a cavity 11, the housing 1 further has a supporting arm 12 located in the cavity 11, the magnetic circuit system 2 is connected to the housing 1 and located in the cavity 11, the magnetic circuit system 2 has a magnetic gap 21, the supporting arm 12 is located at an outer side of the magnetic gap 21, the vibration system 3 includes a diaphragm 31 and a voice coil 32, the diaphragm 31 is connected to the housing 1 and is opposite to and spaced apart from the magnetic circuit system 2, one end of the voice coil 32 is connected to the diaphragm 31, the other end of the voice coil is suspended in the magnetic gap 21, the voice coil 32 has a lead 321, and the lead 321 is led out from the magnetic gap 21 to the supporting arm 12 and is supported by the supporting arm 12.

In the present embodiment, the housing 1 is used for mounting, fixing, supporting and protecting the components of the vibration system 3, the magnetic circuit system 2 and the like, that is, the housing 1 provides a mounting base for the components of the vibration system 3, the magnetic circuit system 2 and the like. It is understood that the housing 1 may be a mounting shell, a housing, or a box with a mounting cavity, that is, the housing 1 defines a receiving space, that is, the housing 1 has the receiving cavity 11, which is not limited herein. Optionally, casing 1 is the rectangle structure, and casing 1 has two relative long limits and two minor faces, and the both ends of minor face are connected with two long limits respectively, and the both ends on long limit are connected with two minor faces respectively to make casing 1 inject and hold chamber 11. The housing 1 may also be of circular or similar configuration, adapted to different terminals.

It can be understood that the shell 1 is a metal piece, and the shell 1 is set to be a metal shell scheme, so that the shell 1 can be processed by adopting a stamping forming process, the cost can be greatly reduced, and the processing steps of the shell 1 are effectively simplified. In the present embodiment, the magnetic circuit system 2 and the housing 1 may be fixed by bonding or welding.

In this embodiment, the cavity 11 of the housing 1 is an accommodating space with openings at two ends, and the magnetic circuit system 2 is connected to one end of the housing 1 and covers the opening at one end of the cavity 11. Magnetic circuit 2 is provided with magnetic gap 21, vibration system 3 includes vibrating diaphragm 31 and connects in the voice coil 32 of vibrating diaphragm 31, the one end and the vibrating diaphragm 31 of voice coil 32 are connected, the other end of voice coil 32 hangs and locates in magnetic gap 21, in introducing voice coil 32 through the electric current with external circuit, utilize voice coil 32 with electric energy transfer to magnetic circuit 2 in the magnetic gap 21, make the magnetic field that magnetic circuit 2 produced convert the electric energy into mechanical energy, thereby make voice coil 32 take place the vibration, and drive vibrating diaphragm 31 and realize the vibration sound production, further convert mechanical energy into acoustic energy.

It can be understood that, after receiving the externally changing alternating current signal, the voice coil 32 disposed in the magnetic gap 21 makes a reciprocating motion of cutting magnetic lines of force under the driving of the magnetic field force of the magnetic circuit system 2, and drives the diaphragm 31 of the vibration system 3 to vibrate and sound, thereby effectively improving the BL value of the sound generating apparatus 100.

It should be noted that the voice coil 32 has a lead 321, and the voice coil 32 receives an externally changed alternating current signal through the lead 321. In the related art, it is common to inject a conductive insert into the plastic housing to introduce an external current into the lead 321 of the voice coil 32 through the conductive insert; alternatively, by providing a centering leg or the like, the centering leg and one end of the voice coil 32 located in the magnetic gap 21 are fixed, and the lead 321 is soldered to the centering leg, so that the voice coil 32 is fixed by the centering leg, and an external current is introduced into the lead 321 of the voice coil 32 through the centering leg. However, these methods not only increase the processing cost, but also complicate the assembly process.

In this embodiment, by providing the supporting arm 12 on the metal casing 1, the supporting arm 12 is located in the accommodating cavity 11, and the magnetic circuit system 2 is connected to the casing 1, and when being located in the accommodating cavity 11, the supporting arm 12 is located outside the magnetic gap 21, so that when the voice coil 32 is suspended in the magnetic gap 21, the lead 321 of the voice coil 32 is led out from the magnetic gap 21 to the supporting arm 12, and is supported by the supporting arm 12. Thereby utilize support arm 12 to support fixed lead wire 321, avoid the lead wire 321 of voice coil 32 to break off at the voice coil 32 vibration in-process, improve the connection stability that the voice coil 32 led wire 321, avoid the voice coil 32 to lead wire 321 to take place the broken string risk simultaneously. The support arm 12 is positioned outside the magnetic gap 21, and can prevent the lead wire from interfering with the main body of the voice coil 32 during vibration.

The sound production device 100 of the invention effectively simplifies the processing steps of the shell 1 and reduces the cost by arranging the containing cavity 11 on the shell 1 so as to arrange the magnetic circuit system 2 and the vibration system 3 on the shell 1 and improve the installation stability of the magnetic circuit system 2 and the vibration system 3, and by arranging the magnetic gap 21 on the magnetic circuit system 2 and connecting the vibrating diaphragm 31 of the vibration system 3 to the shell 1 and opposite to and spaced from the magnetic circuit system 2 so as to form a vibration space in a surrounding manner, one end of the voice coil 32 is connected with the vibrating diaphragm 31, and the other end is suspended in the magnetic gap 21, so that current is introduced into the voice coil 32, so that the voice coil 32 introduces the current into the magnetic field formed by the magnetic circuit system 2, and under the action of the magnetic circuit system 2, the voice coil 32 drives the vibrating diaphragm 31 to vibrate and produce sound. Further through set up the support arm 12 that is located and holds the intracavity 11 on casing 1, so connect in casing 1 at magnetic circuit 2, and when being located and hold the intracavity 11, make support arm 12 be located the outside of magnetic gap 21, thereby lead out the lead wire 321 of voice coil 32 to support arm 12 from magnetic gap 21, and support in support arm 12, thereby avoid the lead wire 321 of voice coil 32 to break off at voice coil 32 vibration in-process, improve the connection stability of voice coil 32 lead wire 321, avoid the voice coil 32 lead wire 321 to take place the off-line risk simultaneously.

In one embodiment, the diaphragm 31 includes a central portion, a folded ring portion surrounding the central portion, and a fixing portion disposed outside the folded ring portion, and the fixing portion is connected to the housing 1. As shown in fig. 1, 3 to 5, the central portion, the bending portion and the fixing portion of the diaphragm 31 are integrally formed. The folded ring part is arranged around the central part and is positioned between the central part and the fixed part, and the folded ring part can be of an upward or downward convex structure. The diaphragm 31 is connected and fixed to the casing 1 of the sound generating apparatus 100 by a fixing portion, so as to improve the connection stability and the sealing property between the casing 1 and the diaphragm 31.

It is understood that, in order to increase the effective vibration area of the diaphragm 31, the fixing portion may be formed by extending the outer side of the bending ring portion downward or upward, so that the fixing portion is connected and fixed with the inner side wall or the outer side wall of the housing 1.

In an embodiment, as shown in fig. 1, 3 to 5, the hollow hole is formed in the central portion, and the vibration system 3 further includes a dome 33, wherein the dome 33 is connected to the central portion and covers the hollow hole. It can be understood that, by providing a hollow hole in the central portion of the diaphragm 31, the overall weight of the diaphragm 31 can be effectively reduced. Optionally, a hollow hole is disposed in the central portion, and the hollow hole may be a through hole or a hollow hole or an opening. Optionally, the number of the hollowed-out holes may be one or more, which is not limited herein.

For the structural strength of reinforced diaphragm 31, avoid diaphragm 31 can take place the aggravation of shrinkage deformation at the vibration in-process, central part through at diaphragm 31 sets up ball-top 33, ball-top 33 connects in central part, and cover the fretwork hole, reinforced diaphragm 31's structural strength on the one hand, on the other hand also can avoid outside impurity or dust to pass through the inside that the fretwork hole got into sound generating mechanism 100, avoid diaphragm 31 can take place the aggravation of shrinkage deformation at the vibration in-process simultaneously, thereby reduce sound generating mechanism 100's THD distortion, promote the audio effect.

In one embodiment, the supporting arm 12 is disposed at the opposite end of the lead 321, the sound generating device 100 is provided with a trace cavity 17 communicating with the magnetic gap 21, and the lead 321 is led to the supporting arm 12 via the trace cavity 17 after being led out from the magnetic gap 21. The support arm 12 and the lead 321 are separated by a certain distance, so that the lead 321 has a sufficient lead length, the lead 321 is further ensured to have sufficient compliance, and the risk that the lead 321 is broken due to the fact that the lead is pulled by stress in the vibration process of the voice coil 32 is avoided. It is understood that the exit position may be formed by providing the magnetic circuit system 2 or the housing 1 with a notch or a groove relief.

In one embodiment, the lead 321 is supported on a side of the supporting arm 12 facing away from the diaphragm 31. That is, the lead 321 is supported on the outer surface of the support arm 12, and the lead 321 is fixed at this time, which is convenient for operation and assembly. The lead 321 may be fixed to the support arm 12 by a damping adhesive, which is a soft adhesive, such as silicon rubber, etc., and the adhesive layer may not only fix the lead 321 to the support arm 12, but also ensure that the lead 321 has a certain degree of freedom, and may buffer the vibration transmitted from the voice coil 32 to the lead 321.

It will be appreciated that the sound generating device 100 further comprises a conductive element 4, the conductive element 4 being at least partially fixed to the support arm 12 and electrically connected to the leads 321. The conductive member 4 may be a single component or a plurality of components, and may be partially fixed to the support arm 12, or may be entirely fixed to the support arm 12, so as to be electrically connected to the lead 321. The application is not limited herein, and technicians can flexibly set the setting according to actual conditions.

In one embodiment, the housing 1 includes a straight wall 13 and a vertical wall 14, the vertical wall 14 is formed by bending and extending the straight wall 13, the straight wall 13 and the vertical wall 14 enclose the receiving cavity 11, the support arm 12 is formed by bending and extending the vertical wall 14 towards the receiving cavity 11, and the straight walls 13 are opposite and spaced; the magnetic circuit system 2 is provided with a vertical part 222 positioned in the accommodating cavity 11, the vertical part 222 is positioned on the inner side of the vertical wall 14 and is spaced from the vertical wall 14 to form a routing cavity 17 in a matched mode, and the supporting arm 12 is positioned in the routing cavity 17; the lead 321 is led out from the magnetic gap 21 to the trace cavity 17 and supported by the supporting arm 12.

In the present embodiment, as shown in fig. 1 to 6, the housing 1 is a square frame structure, and the housing 1 includes a straight wall 13 and a vertical wall 14 arranged at an included angle. Optionally, the vertical wall 14 is formed by bending and extending one side of the straight wall 13, and the vertical wall 14 is perpendicular to the straight wall 13 to enclose the receiving cavity 11. The support arm 12 is arranged at the end of the vertical wall 14 remote from the straight wall 13. Alternatively, the support arm 12 is formed by a vertical wall 14 extending towards the inside of the housing 11, and the flat walls 13 are opposite and spaced apart.

It will be appreciated that the side of the flat wall 13 facing away from the vertical wall 14 is fixedly connected to a fixed part of the diaphragm 31. Alternatively, the flat wall 13 and the fixed portion of the diaphragm 31 are connected and fixed in an adhesive manner. When the magnetic circuit system 2 is installed in the accommodating cavity 11, the vertical portion 222 of the magnetic circuit system 2 is located inside the vertical wall 14 and is spaced from the vertical wall 14 to form the trace cavity 17 in a matched manner, so that the trace cavity 17 is utilized to realize trace limitation of the lead 321, and the trace cavity 17 is spaced from the magnetic gap 21, thereby further avoiding the lead 321 from affecting vibration of the voice coil 32.

It should be noted that, in order to ensure that the lead 321 has a certain moving space in the vibration process of the voice coil 32, the support arm 12 and the lead 321 are spaced at a certain distance from each other at the leading-out position, one end of the lead 321 connected to the voice coil 32 is located in the magnetic gap 21, and is led out from the magnetic gap 21 to the wiring cavity 17, and when the lead 321 is supported on the support arm 12, that is, a section of the lead 321 is suspended from the front of the support arm 12 to the lead 321, so that in the vibration process of the voice coil 32, the lead 321 vibrates along with the voice coil 32, thereby effectively avoiding the lead 321 from being broken due to the connection between the lead 321 and the support arm 12.

It will be appreciated that the lead 321 is spaced from the exit position to the support arm 12 to ensure that the lead 321 is movable. Simultaneously, thereby in order to avoid lead 321 unsettled to take place the swing along with voice coil 32 vibration in-process and influence sound generating mechanism 100's acoustic performance, through with lead 321 original voice coil 32's one end support be fixed in on the support arm 12 to reduce the length that the unsettled setting of lead 321, thereby effectively avoid lead 321 unsettled to take place the swing along with voice coil 32 vibration in-process and influence sound generating mechanism 100's acoustic performance.

In this embodiment, in order to avoid that the lead 321 is connected to the support arm 12 and is completely unable to move, so that the lead 321 is broken due to the hard connection between the lead 321 and the support arm 12 in the vibration process of the voice coil 32, the lead 321 is connected with the support arm 12 by using a glue layer, optionally, the glue layer is made of damping glue, and the damping glue is made of soft glue, such as silica gel, rubber, and the like, and the glue layer can fix the lead 321 and the support arm 12, and can ensure that the lead 321 has a certain degree of freedom, so as to buffer the vibration transmitted from the voice coil 32 to the lead 321.

In one embodiment, the support arm 12 includes a platform portion 121 and an inclined portion 122 connected to each other, the platform portion 121 is connected to the vertical wall 14, and the inclined portion 122 extends from the platform portion 121 toward the inside of the routing cavity 17; the sound generating device 100 further includes a conductive member 4, the conductive member 4 is disposed on the platform portion 121, and the lead 321 is supported by the supporting arm 12 and connected to the conductive member 4.

In the present embodiment, as shown in fig. 2, fig. 3 and fig. 6, the supporting arm 12 is provided as a platform part 121 and an inclined part 122 which are connected, so that the platform part 121 is connected with the vertical wall 14, that is, the platform part 121 is formed by bending and extending the vertical wall 14, and the inclined part 122 is formed by extending one end of the platform part 121 into the trace cavity 17.

Optionally, the inclined portion 122 extends obliquely from the platform portion 121 toward the inside of the trace cavity 17, that is, the inclined portion 122 extends from the platform portion 121 along the inside of the trace cavity 17 and extends toward one end of the lead 321 connected to the voice coil 32, that is, the inclined portion 122 is optionally suspended. It can be understood that by providing the inclined portion 122 with an inclined structure, the lead wire 321 can be guided to the platform portion 121 more gently, so as to avoid the lead wire 321 from generating a sharp bend and ensure the compliance of the lead wire 321.

It can be understood that the terrace portion 121 of the support arm 12 is located at an end of the vertical wall 14 away from the lead 321 for connecting the voice coil 32, and the terrace portion 121 is arranged so as to fix the conductive member 4 by using the terrace portion 121, thereby ensuring the connection stability of the conductive member 4 and the lead 321. In the present embodiment, after the lead 321 is connected to the conductive device 4, in order to ensure the connection stability and avoid the phenomenon of non-smooth conduction due to fracture, the lead 321 is fixed on the end portion of the inclined portion 122 close to the terrace portion 121, so as to ensure the connection stability between the lead 321 and the conductive device 4.

Alternatively, the distance from the inclined portion 122 to the flat wall 13 gradually decreases from the end adjacent to the terrace portion 121 to the end distant from the terrace portion 121. It is understood that one end of the lead 321 adjacent to the conductive member 4 is connected to the inclined portion 122 by a glue layer, which may be selected as a damping glue.

In the present embodiment, the lead wire 321 is connected to the side of the inclined portion 122 facing away from the flat wall 13, and the conductive member 4 is fixed to the side of the platform portion 121 facing away from the flat wall 13. Alternatively, the conductive member 4 is FPCB. The conductive member 4 may be fixed to the platform part 121 by an adhesive means.

In one embodiment, as shown in FIG. 3, the voice coil 32 has a long axis side 322 and a short axis side 323 that are connected end to end. Alternatively, the voice coil 32 has a rectangular ring structure, that is, two long-axis sides 322 and two short-axis sides 323 of the voice coil 32 are alternately connected to form a ring structure with an end-to-end connection. In order to ensure that an external current is supplied to the voice coil 32, the voice coil 32 has two leads 321, that is, the voice coil 32 has an input lead and an output lead, so that the external current is conveniently led into the voice coil 32 from the input lead of the voice coil 32 through the conductive member 4, led out of the voice coil 32 from the output lead to the conductive member 4, and inputted into an external circuit.

Alternatively, the two leads 321 may be disposed on the two major axis sides 322 or the two minor axis sides 323 of the voice coil 32, respectively. In the present embodiment, as shown in fig. 3, the leads 321 include two leads, and each lead 321 is disposed corresponding to one of the long-axis sides 322.

In the present embodiment, as shown in fig. 3 and fig. 6, the vertical wall 14 is bent and extended to form a supporting arm 12 corresponding to each long axis side 322, and the vertical portion 222 and the vertical wall 14 form a routing cavity 17 corresponding to each long axis side 322; each lead 321 is led out from the magnetic gap 21 to a trace cavity 17 and supported by a support arm 12.

It is understood that the lead 321 is located at one end of the long shaft side 322 of the voice coil 32, and the other end of the vertical wall 14 corresponding to the long shaft side 322 is bent and extended to form the supporting arm 12. In the present embodiment, the number of the supporting arms 12 and the number of the routing cavities 17 are the same as the number of the leads 321.

When the leads 321 are disposed on the two long-axis sides 322 of the voice coil 32, the support arm 12 and the trace cavity 17 are disposed corresponding to the long-axis sides 322 of the voice coil 32. When the leads 321 are disposed on the two short shaft sides 323 of the voice coil 32, the supporting arm 12 and the trace cavity 17 are disposed corresponding to the short shaft sides 323 of the voice coil 32, which is not limited herein.

In one embodiment, the magnetic circuit system 2 includes a magnetic yoke 22 and a central magnetic circuit portion 23, wherein the magnetic yoke 22 includes a bottom 221 and a vertical portion 222 disposed on a periphery of the bottom 221, the vertical portion 222 and the bottom 221 surround to form a receiving groove 223, and the central magnetic circuit portion 23 is disposed in the receiving groove 223 and spaced from the vertical portion 222 to form the magnetic gap 21.

In the present embodiment, as shown in fig. 2 to 5 and 7, the magnetic conductive yoke 22 may be a magnetic conductive plate or a magnetic conductive frame, which is not limited herein. The yoke 22 is used to support and mount the fixed central magnetic circuit portion 23. The magnetic circuit system 2 is fixedly connected with the housing 1 through the magnetic yoke 22. Alternatively, the magnetic yoke 22 is adhesively connected to the central magnetic circuit portion 23, and the magnetic yoke 22 is adhesively connected to the housing 1.

It can be understood that, by providing the magnetic yoke 22 as the bottom portion 221 and the vertical portion 222, the vertical portion 222 is provided at the periphery of the bottom portion 221, so that the vertical portion 222 and the bottom portion 221 surround to form the accommodating groove 223, so that the central magnetic path portion 23 and the vertical portion 222 are spaced to form the magnetic gap 21 while the fixed central magnetic path portion 23 is installed by using the accommodating groove 223.

Alternatively, the central magnetic path portion 23 includes a central magnet 231 and a central washer 232, which are stacked, and the central magnet 231 is disposed between the central washer 232 and the bottom 221 of the magnetic conductive yoke 22. The center magnet 231 and the center washer 232 are spaced apart from the vertical portion 222 to form the magnetic gap 21.

It will be appreciated that the central washer 232 may alternatively be a magnetically permeable plate structure. The central magnet 231 and the central washer 232 have the same structural contour, and the central magnet 231 and the central washer 232 may be a plate-shaped structure or a ring-shaped structure, which is not limited herein.

In the present embodiment, the vertical portion 222 may be an annular structure, and the annular vertical portion 222 surrounds the central magnetic path portion 23 and is spaced apart from the central magnetic path portion 23 to form the annular magnetic gap 21. Alternatively, the vertical portion 222 may have a circular shape, or a polygonal shape such as a quadrangle, a pentagon, a hexagon, and the like.

In an embodiment, as shown in fig. 3 and 7, the vertical portion 222 includes a plurality of vertical portions 222, the plurality of vertical portions 222 are disposed at intervals along the periphery of the bottom 221, two adjacent vertical portions 222 form a communication gap 224, and the trace cavity 17 is communicated with the magnetic gap 21 through the communication gap 224.

It will be appreciated that the lead 321 is connected at the junction of the long axis side 322 and the short axis side 323 of the voice coil 32, and thus the communication gap 224 is provided, so as to facilitate the lead 321 to be led out from the magnetic gap 21 through the communication gap 224 and into the trace cavity 17. In the present embodiment, the vertical portion 222 has a long side opposite to the long axis side 322 and a short side opposite to the short axis side 323, and the communication notch 224 is formed adjacent to the long side and the short side of the vertical portion 222.

In an embodiment, as shown in fig. 2, 3, 5 and 7, the magnetic conductive yoke 22 further includes a positioning portion 225, the positioning portion 225 is formed by bending and extending a side of the vertical portion 222 corresponding to the short-axis side 323 toward a side away from the accommodating groove 223, and the positioning portion 225 abuts against and limits the vertical wall 14. It can be understood that, by providing the positioning portion 225 on the magnetic conductive yoke 22, the magnetic conductive yoke 22 is fixedly connected to the vertical wall 14 of the housing 1 through the positioning portion 225.

Optionally, locating portion 225 is in abutting position with vertical wall 14 and is fixedly connected together by gluing or welding.

In an embodiment, as shown in fig. 3, 5 and 7, the vertical wall 14 is further provided with a positioning notch 141 corresponding to the short shaft edge 323, the positioning portion 225 is provided with a positioning protrusion 226 corresponding to the positioning notch 141, and the positioning protrusion 226 is received and limited in the positioning notch 141. It can be understood that, with such an arrangement, the positioning and installation of the magnetic circuit system 2 and the housing 1 can be achieved through the cooperation of the positioning protrusion 226 and the positioning notch 141, and it is ensured that the routing cavities 17 formed by the cooperation of the vertical portion 222 of the magnetic circuit system 2 and the vertical wall 14 of the housing 1 are symmetrically arranged, so as to ensure the performance of the sound generating device 100.

In an embodiment, as shown in fig. 3, 5 and 7, one side of the straight wall 13 corresponding to the short axis 323 is bent and extended toward the receiving cavity 11 to form a positioning table 15, and the positioning table 15 is abutted and positioned with the positioning portion 225. It will be understood that this arrangement can both support the fixing and positioning portion 225 by the positioning table 15 and ensure the positioning effect of the positioning table 15. Optionally, the protrusion thickness or bending length of the positioning table 15 is consistent with the protrusion thickness or bending length of the positioning protrusion 226.

In an embodiment, the magnetic conductive yoke 22 further includes a covering portion 227, the covering portion 227 is formed by bending and extending a side of the vertical portion 222 corresponding to the long shaft edge 322, the covering portion 227 is opposite to and spaced apart from the flat wall 13, so that the flat wall 13, the vertical wall 14, the covering portion 227 and the vertical portion 222 enclose the wiring cavity 17, and the supporting arm 12 is located between the flat wall 13 and the covering portion 227.

In this embodiment, as shown in fig. 2, 3, 4 and 7, the shielding portion 227 is disposed on the magnetic yoke 22, so that the shielding portion 227 covers the opening of the routing cavity 17 to shield the lead 321 and protect the lead 321, which not only can improve the aesthetic property, but also can adjust the airflow in the vibration space through the shielding portion 227 to control the acoustic performance of the sound generating device 100.

It is understood that the covering portion 227 is formed by bending and extending a side of the vertical portion 222 corresponding to the long axis edge 322. Optionally, the cover portion 227 is disposed flush with the bottom portion 221, and the cover portion 227 is formed by continuously bending the vertical portion 222. Optionally, the bottom 221, the vertical portion 222, and the covering portion 227 of the magnetic conductive yoke 22 are integrally formed, that is, formed by a stamping or continuous bending process. The bottom 221, the vertical portion 222, and the positioning portion 225 of the magnetic yoke 22 are integrally formed, i.e., formed by stamping or continuous bending, and are not limited herein.

In one embodiment, as shown in fig. 2, 3, 4 and 7, the side of the cover portion 227 remote from the upright portion 222 is bent toward the flat wall 13 to form a positioning boss 228, and the positioning boss 228 is positioned in abutment with the support arm 12. It can be understood that, by providing the positioning boss 228, the positioning boss 228 is utilized to support and limit the magnetic yoke 22, so as to improve the connection stability and the installation positioning effect of the magnetic yoke 22 and the shell 1.

In an embodiment, as shown in fig. 3, 4 and 6, the housing 1 further includes a limiting wall 16, the limiting wall 16 is formed by bending and extending one side of the straight wall 13 corresponding to the long axis side 322 toward the routing cavity 17, the limiting wall 16 is spaced and opposite to the vertical wall 14 and is disposed in a staggered manner with respect to the supporting arm 12, the limiting wall 16, the straight wall 13 and the vertical wall 14 enclose to form a limiting groove, and the lead 321 is led out from the magnetic gap 21 into the limiting groove and is supported on the supporting arm 12.

It will be appreciated that the positioning of the limiting wall 16 can effectively limit the lead 321 introduced into the trace cavity 17 from the magnetic gap 21 through the communication gap 224. Optionally, the limiting wall 16 is formed by bending and extending one side of the straight wall 13 corresponding to the long axis side 322 toward the inside of the routing cavity 17, so that the limiting wall 16 is spaced and opposite to the vertical wall 14, so that the limiting wall 16, the straight wall 13 and the vertical wall 14 enclose to form a limiting groove, and thus when the lead 321 is introduced into the routing cavity 17 from the magnetic gap 21 through the communication notch 224, the lead is limited in the limiting groove and is led out to the inclined portion 122 of the support arm 12 through the limiting groove.

Optionally, the limiting wall 16 and the supporting arm 12 are arranged in a staggered manner, that is, the projection of the limiting wall 16 onto the vertical wall 14 is not overlapped with the projection of the supporting arm 12 onto the vertical wall 14.

In one embodiment, the magnetic yoke 22 has air holes, and the sound generating device 100 further includes a metal mesh, which is provided with a side of the magnetic yoke 22 facing away from the casing 1 and covers the air holes.

In this embodiment, the vibrating diaphragm 31, the casing 1 and the magnetic circuit system 2 enclose and close to form a vibration space, and in order to balance the pressure inside and outside the vibration space of the sound generating device 100, the air holes are formed through the magnetic yoke 22, so that the air holes are communicated with the outside atmosphere, when the voice coil 32 drives the vibrating diaphragm 31 to vibrate, the atmospheric pressure inside and outside the vibration space can be balanced through the air holes, and the acoustic performance of the sound generating device 100 can be ensured.

It will be understood that by providing the metal mesh, the metal mesh is provided with the side of the conductive yoke 22 facing away from the housing 1 and covers the ventilation holes. Thus, when the sound generating device 100 is installed in an electronic device, the sound absorbing material can be filled to further improve the sound generating effect and the acoustic performance. Due to the arrangement of the metal net, the sound-absorbing material is effectively prevented from entering the interior of the sound-generating device 100 through the air holes to influence the sound-generating effect of the sound-generating device 100.

In one embodiment, the vibration system 3 further comprises a damper, the damper comprising an outer fixing portion, an inner fixing portion and an elastic portion connected between the outer fixing portion and the inner fixing portion, the outer fixing portion being connected to the housing 1, and the inner fixing portion being connected to the voice coil 32.

In this embodiment, through setting up the spider for the outer fixed part of spider is connected with casing 1, and the interior fixed part of spider is connected with voice coil loudspeaker voice coil 32, thereby utilizes the balance of spider and stabilizes the vibration that voice coil loudspeaker voice coil 32 drove vibrating diaphragm 31, avoids voice coil loudspeaker voice coil 32 to drive vibrating diaphragm 31 and takes place swing or polarization phenomenon.

In this embodiment, the centering branch piece is optionally made of PI material, so that the centering branch piece can be made thinner to save material and installation space, thereby effectively increasing the volume of the magnetic circuit system 2 and improving the BL value of the product. Alternatively, the centering buttresses may take a one-layer construction. Of course, in other embodiments, the centering disk may also be formed as a composite structure using a multi-layer structure, and is not limited herein. Optionally, the thickness of the centralizer sheet is greater than or equal to 0.0125mm.

In order to further increase the elongation of the centering pad, in an embodiment, the elastic portion includes two elastic arms and a bending portion connecting the two elastic arms, the bending portion and the two elastic arms enclose an elastic space 336, and ends of the two elastic arms far away from the bending portion are respectively connected to the outer fixing portion and the inner fixing portion.

It can be understood that the arm length of elastic part can be effectively increased by the arrangement, and the flexibility and the elastic deformation performance of the centering support piece are improved. It should be noted that, when the damper is set in the static state, the elastic arm of the damper can be made short, so that more space is available for enlarging the size of the magnet in the magnetic circuit system 2, and the product performance is improved.

Optionally, the centering branch sheet can be composed of one or more layers of materials, and when one layer of material is used for the centering branch sheet, the hardness and the thickness of the matched material can be selected according to the length of the elastic part; in contrast, when multiple layers of material are used for the stiffener, each layer of material may be selected to have a lower modulus of elasticity. Because the centering support piece is flexibly designed, the design scheme that the centering support piece is light in weight is selected, and the performance of a product is facilitated.

In one embodiment, the supporting core includes a plurality of supporting cores, and the magnetic circuit system 2 has a plurality of communicating gaps 224 communicating with the magnetic gaps 21, and each supporting core is disposed corresponding to one communicating gap 224.

In the present embodiment, the damper includes an outer fixing portion, an inner fixing portion, and an elastic portion connected between the outer fixing portion and the inner fixing portion, the outer fixing portion is connected to the casing 1, and the inner fixing portion is connected to a side of the voice coil 32 facing away from the diaphragm 31.

It can be understood that the centering support can be a large integral structure, the outer fixing portion can be selected as an annular structure and is connected with the casing 1, the inner fixing portion is connected with one end of the voice coil 32, which faces away from the vibrating diaphragm 31, the inner fixing portion is connected with the outer fixing portion through the elastic portion, so that when the voice coil 32 vibrates, the inner fixing portion drives the elastic portion to deform, and the voice coil 32 is prevented from driving the vibrating diaphragm 31 to swing or polarize.

Of course, in other embodiments, the centering branch pieces may also be a plurality of small pieces, for example, the centering branch pieces include two or four centering branch pieces, and when there are two centering branch pieces, the two centering branch pieces are symmetrically disposed, and the two centering branch pieces are symmetrically disposed and connected to the two short shafts or the two long shafts of the housing 1, which is not limited herein. When the number of the centering pads is four, the four centering pads are disposed at four corners of the housing 1, so as to ensure symmetry, thereby ensuring balance of vibration of the voice coil 32 of the sound generating apparatus 100. Optionally, the centering branch pieces include four, and four centering branch pieces are arranged corresponding to the four communication gaps 224 of the magnetic circuit system 2.

The invention also provides an electronic device, which comprises a device shell 1 and the sound generating device 100, wherein the sound generating device 100 is arranged on the device shell 1. The specific structure of the sound generating device 100 refers to the foregoing embodiments, and since the electronic device adopts all the technical solutions of all the foregoing embodiments, at least all the beneficial effects brought by the technical solutions of the foregoing embodiments are achieved, and no further description is given here.

The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A sound generating device, the sound generating device comprising:

the vibration system comprises a vibration diaphragm and a voice coil, the vibration diaphragm is connected to the shell and is opposite to and spaced from the magnetic circuit system, one end of the voice coil is connected with the vibration diaphragm, the other end of the voice coil is suspended in the magnetic gap, the voice coil is provided with a lead, and the lead is led out of the magnetic gap to the supporting arm and is supported on the supporting arm.

2. The sound generating device as claimed in claim 1, wherein the housing comprises a straight wall and a vertical wall, the straight wall is formed by bending and extending the straight wall, the straight wall and the vertical wall enclose a cavity, the support arm is formed by bending and extending the vertical wall towards the cavity, and the straight walls are opposite and spaced;

the magnetic circuit system is provided with a vertical part positioned in the accommodating cavity, the vertical part is positioned on the inner side of the vertical wall and is spaced from the vertical wall to form a wiring cavity in a matched manner, and the supporting arm is positioned in the wiring cavity;

the lead is led out from the magnetic gap to the wiring cavity and supported by the supporting arm.

3. The apparatus according to claim 2, wherein the supporting arm comprises a platform portion and an inclined portion connected to each other, the platform portion is connected to the vertical wall, and the inclined portion extends from the platform portion toward the wiring cavity;

the sound generating device further comprises a conductive piece, the conductive piece is arranged on the platform part, and the lead is guided to the platform part through the inclined part and is connected with the conductive piece.

4. The apparatus according to claim 3, wherein the distance from said inclined portion to said flat wall is gradually reduced from an end adjacent to said terrace portion to an end away from said terrace portion;

and/or, the conductive member is a FPCB.

5. The sound generating apparatus of claim 2, wherein said voice coil has a major axis side and a minor axis side that are connected end to end;

each lead is led out from the magnetic gap to one wiring cavity and supported by one supporting arm.

6. The sound generating apparatus as claimed in claim 5, wherein the magnetic circuit system comprises:

7. The sounding device according to claim 6, wherein the vertical portions include a plurality of vertical portions, the vertical portions are spaced along the bottom peripheral edge, a communication gap is formed between two adjacent vertical portions, and the wiring cavity is communicated with the magnetic gap through the communication gap.

8. The sounding device according to claim 6, wherein the magnetic yoke further comprises a positioning portion formed by bending and extending a side of the vertical portion corresponding to the short axis side away from the receiving groove, and the positioning portion abuts against and is limited by the vertical wall.

9. The sounding device according to claim 8, wherein the vertical wall is further provided with a positioning notch corresponding to the short axis, the positioning portion is provided with a positioning protrusion corresponding to the positioning notch, and the positioning protrusion is received and limited in the positioning notch;

and/or one side of the straight wall corresponding to the short shaft edge is bent and extended towards the accommodating cavity to form a positioning table, and the positioning table is abutted and positioned with the positioning part.

10. The sound generating device as claimed in claim 6, wherein the magnetic yoke further comprises a cover portion formed by bending and extending a side of the vertical portion corresponding to the long axis edge, the cover portion is opposite to and spaced apart from the flat wall, so that the flat wall, the vertical wall, the cover portion and the vertical portion cooperate to form the trace cavity, and the supporting arm is located between the flat wall and the cover portion.

11. The apparatus according to claim 10, wherein a side of said cover portion away from said vertical portion is bent toward said flat wall to form a positioning projection, and said positioning projection is abutted against said supporting arm;

and/or, the casing still includes spacing wall, spacing wall by the straight wall correspond one side orientation on major axis limit the line intracavity is buckled and is extended and formed, spacing wall with vertical wall interval and relative, and with the support arm is the dislocation set, spacing wall, straight wall and vertical wall enclose to close and form the spacing groove, the lead wire is followed in the magnetic gap draw forth to in the spacing groove, and support on the support arm.

12. An electronic device comprising a device housing and the sound-generating device of any one of claims 1 to 11, wherein the sound-generating device is provided in the device housing.