CN114501256A

CN114501256A - Sound production device and electronic equipment

Info

Publication number: CN114501256A
Application number: CN202210290478.7A
Authority: CN
Inventors: 蔡晓东; 郎贤忠; 张琳琳
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2022-03-23
Filing date: 2022-03-23
Publication date: 2022-05-13
Anticipated expiration: 2042-03-23
Also published as: CN114501256B

Abstract

The invention discloses a sound generating device and electronic equipment, wherein the sound generating device comprises a shell, a coil, a vibrator component and a vibration system, a vibrator main body of the vibrator component is suspended in an installation cavity of the shell, a first magnetic circuit system is arranged on the vibrator main body and is opposite to the coil, a second magnetic circuit system is arranged on one side of the vibrator main body, back to the first magnetic circuit system, and is opposite to the vibration system, a magnetic gap is formed in the second magnetic circuit system, the vibration diaphragm component of the vibration system is fixed on the shell, and a voice coil is inserted into the magnetic gap and drives the vibration diaphragm component to vibrate; the coil drives the vibrator main body to drive the first magnetic circuit system and the second magnetic circuit system to vibrate simultaneously, the centroid and the mass center of the vibrator component are defined to be coincident, the axis which is parallel to the vibration direction of the vibration system and penetrates through the mass center is defined as a rotating shaft, and the rotating angle of the vibrator component around the rotating shaft is 0-1.6 degrees. The sound generating device integrates the loudspeaker and the motor into a whole, so that the integration level of the sound generating device can be improved, and the occupied space of the sound generating device in electronic equipment is saved.

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

Electronic product equipment, especially cell-phone class product, need have audio frequency experience concurrently usually and vibrate the sense of touch and experience the function, and audio frequency experience comes from the speaker device, and sense of touch vibration experience comes from motor device, and in improving user's audio frequency and the sense of touch of vibration experience in-process, generally set up speaker device and motor device separately respectively among the correlation technique, lead to occupation space in intelligent terminal equipment big, the not ideal scheduling problem of overall arrangement effect to intelligent terminal's user experience has been influenced.

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 integrates a loudspeaker and a motor into a whole and improves the acoustic performance of the sound generating device.

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

the shell is provided with a mounting cavity;

the coil is arranged in the mounting cavity;

the vibrator component comprises a vibrator main body, a first magnetic circuit system and a second magnetic circuit system, the vibrator main body is suspended in the installation cavity, the first magnetic circuit system is arranged on the vibrator main body and is opposite to the coil, the second magnetic circuit system is arranged on one side, back to the first magnetic circuit system, of the vibrator main body, and a magnetic gap is formed in the second magnetic circuit system;

the vibration system is arranged in the installation cavity and is positioned on one side of the vibrator component, which is opposite to the coil, the vibration system comprises a voice coil and a vibrating diaphragm component connected with the voice coil, the vibrating diaphragm component is fixed on the shell, and the voice coil is inserted into the magnetic gap and drives the vibrating diaphragm component to vibrate;

the coil drives the vibrator main body to drive the first magnetic circuit system and the second magnetic circuit system to vibrate simultaneously, the centroid and the mass center of the vibrator assembly are defined to be coincident, the axis which is parallel to the vibration direction of the vibration system and penetrates through the mass center is defined as a rotating shaft, and the rotating angle of the vibrator assembly around the rotating shaft is 0-1.6 degrees.

In one embodiment, the vibrator body includes:

the counterweight seat is provided with a hollow cavity, the first magnetic circuit system is arranged in the hollow cavity and is matched with the counterweight seat to form an accommodating groove, part of the coil is accommodated in the accommodating groove, and the second magnetic circuit system is arranged on one side of the counterweight seat, which is opposite to the first magnetic circuit system; and

one end of the elastic piece is connected with the counterweight seat, and the other end of the elastic piece is connected with the cavity wall of the installation cavity, so that the counterweight seat is suspended in the installation cavity.

In an embodiment, a fixing groove is formed in a side of the counterweight seat facing away from the coil, the hollow cavity penetrates through a bottom wall of the fixing groove, the vibrator assembly further includes a magnetic conductive plate disposed in the fixing groove, and the first magnetic circuit system and the second magnetic circuit system are respectively fixed on surfaces of two opposite sides of the magnetic conductive plate.

In an embodiment, a side of the magnetic conductive plate facing the second magnetic circuit system is flush with a side of the counterweight seat facing the second magnetic circuit system.

In an embodiment, the elastic member includes two elastic pieces, the two elastic pieces are symmetrically disposed on two opposite sides of the counterweight seat, one end of each elastic piece is connected with the counterweight seat, and the other end of each elastic piece is connected with a cavity wall of the mounting cavity.

In one embodiment, the shape of the elastic sheet is V-shaped, U-shaped, W-shaped or Y-shaped;

and/or one end of the elastic sheet, which is far away from the counterweight seat, is connected with the cavity wall of the installation cavity through a connecting sheet.

In one embodiment, the second magnetic circuit system includes a central magnetic circuit portion provided to the vibrator body and a side magnetic circuit portion provided to an outer side of the central magnetic circuit portion and spaced apart from the central magnetic circuit portion to form the magnetic gap.

In one embodiment, the vibrator body has a long axis side and a short axis side, a gap between the long axis side of the vibrator body and the side wall of the mounting cavity is defined as d1, and a height difference between the central magnetic circuit portion and the side magnetic circuit portion is defined as h1, wherein h1 is not less than d 1.

In one embodiment, the side magnetic path portions include two side magnetic path portions, the two side magnetic path portions are arranged on two sides of a long axis side of the central magnetic path portion, and an extension direction of the magnetic gap formed by the two side magnetic path portions and the central magnetic path portion is consistent with an extension direction of the long axis side;

and/or the central magnetic circuit part comprises a central magnet and a central washer which are arranged on the vibrator main body, the central washer is arranged on one side of the central magnet, which faces away from the vibrator main body, the side magnetic circuit part comprises a side magnet and a side washer which are arranged on the vibrator main body, the side washer is arranged on one side of the side magnet, which faces away from the vibrator main body, and the magnetizing direction of the central magnet is opposite to the magnetizing direction of the side magnet.

In an embodiment, the vibration system further includes a centering support, one end of the centering support is connected to one end of the voice coil, which is far away from the diaphragm assembly, and the other end of the centering support is connected to the housing.

In one embodiment, the housing includes a middle frame disposed at an outer periphery of the diaphragm assembly, and the diaphragm assembly includes:

the vibrating diaphragm comprises a central part, a folded ring part arranged around the central part and a fixing part connected to the outer side of the folded ring part, and the periphery of the fixing part is connected with the inner wall of the middle frame; and

a reinforcement member provided at the central portion;

wherein the voice coil is connected to the central portion or the reinforcing member.

In one embodiment, the inner wall of the housing is convexly provided with a limiting blocking platform, the limiting blocking platform is opposite to the edge position of the reinforcing part, the limiting blocking platform surrounds to form a through opening, and the voice coil penetrates through the through opening and is suspended in the magnetic gap.

In an embodiment, a conductive metal sheet is further arranged in the housing, an inner bonding pad is arranged at one end of the conductive metal sheet, the inner bonding pad is exposed on one side, back to the bending ring portion, of the limiting blocking table and is connected with the centering support sheet in a welding mode, an outer bonding pad is arranged at the other end of the conductive metal sheet, and the outer bonding pad is exposed on the outer wall of the housing and is used for being connected with an external circuit.

In one embodiment, the diaphragm and the reinforcing member are integrally injection-molded;

and/or the vibrating diaphragm and the middle frame are integrally injection-molded;

and/or the reinforcing piece and the central part are integrally hot-pressed and molded;

and/or one of the fixing part and the inner wall of the middle frame is provided with a limiting boss, the other of the fixing part and the inner wall of the middle frame is provided with a limiting groove, and the limiting boss is limited in the limiting groove;

and/or the middle frame is connected with the shell in a sealing way or in a welding way;

and/or, one of the middle frame and the shell is provided with a limiting groove, the other of the middle frame and the shell is provided with a limiting post, and the limiting post is limited in the limiting groove;

and/or, the sound generating device further comprises a front cover, and the front cover is arranged on one side, back to the voice coil, of the vibrating diaphragm and connected with the middle frame.

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.

The sound production device of the technical scheme of the invention is characterized in that the mounting cavity is arranged in the shell, so that the mounting cavity is utilized to mount, fix and protect the coil, the vibrator component and the vibration system, the vibrator main body of the vibrator component is suspended in the mounting cavity, the first magnetic circuit system is arranged on the vibrator main body and is arranged opposite to the coil, so that the vibrator main body is driven to drive the first magnetic circuit system and the second magnetic circuit system to vibrate by utilizing the interaction of the coil and the first magnetic circuit system, so that the motor vibration function is realized, the sound production device has the vibration touch experience function, meanwhile, the second magnetic circuit system is arranged on one side of the vibrator main body back to the first magnetic circuit system, the second magnetic circuit system is provided with the magnetic gap, the vibration coil component of the vibration system is fixed on the shell and is inserted in the magnetic gap, thus, the vibration coil is used for driving the vibration diaphragm component to vibrate, namely, the vibration system is matched with the second magnetic circuit system to form the loudspeaker module, the sound production function is realized, so that the sound production device has an audio experience function, namely, a vibrator component with a motor vibration function and a loudspeaker module are integrated into a whole, the integration level of the sound production device is effectively improved, and the occupied space of the sound production device in the electronic equipment is saved; simultaneously, the centroid and the centroid coincidence of definition oscillator subassembly, and the axis that is on a parallel with vibration system's vibration direction and passes the centroid is the rotation axis, thereby make oscillator subassembly avoid the voice coil loudspeaker voice coil for 0 ~ 1.6 around the turned angle of rotation axis, make oscillator subassembly effectively avoid second magnetic circuit collision voice coil loudspeaker voice coil at normal work vibration in-process, also when utilizing coil drive oscillator main part vibration, so that sound generating mechanism's oscillator subassembly and vibration system can work respectively, and do not interfere each other, make sound generating mechanism have audio experience and vibration sense of touch experience function concurrently, promote user's experience and feel. In addition, sound generating mechanism is when being in the operating mode that falls, and through setting up that the turned angle of oscillator subassembly around the rotation axis is 0 ~ 1.6, can effectively prevent oscillator subassembly and voice coil loudspeaker voice coil from colliding to can ensure that the voice coil loudspeaker voice coil is not hurt when sound generating mechanism falls, promote sound generating mechanism's use reliability.

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 apparatus according to an embodiment of the present invention;

FIG. 2 is an exploded view of the sound generator according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a sound generator according to an embodiment of the present invention;

FIG. 4 is an exploded view of a portion of the sound generator of an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a sound generating device in a resting state according to an embodiment of the present invention;

FIG. 6 is a schematic structural view illustrating the rotation of the sound generating device to a limited angle according to an embodiment of the present invention;

FIG. 7 is a schematic view of a housing according to an embodiment of the present invention;

FIG. 8 is a schematic cross-sectional view of a portion of a diaphragm assembly in an embodiment of the invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name(s)
				100	Sound producing device	322	Magnetic block
1	Outer cover	33	Second magnetic circuit system
				11	Mounting cavity	331	Central magnetic circuit part
12	Limiting groove	3311	Center magnet
				13	Limiting stop table	3312	Central washer
14	Through opening	332	Side magnetic circuit part
				15	Conductive metal sheet	3321	Edge magnet
151	Inner bonding pad	3322	Side washer
				152	Outer bonding pad	333	Magnetic gap
16	Middle frame	34	Magnetic conductive plate
				161	Limiting groove	4	Vibration system
162	Limiting column	41	Vibrating diaphragm component
				2	Coil	412	Vibrating diaphragm
3	Vibrator assembly	4121	Center part
				31	Vibrator main body	4122	Folded ring part
311	Counterweight seat	4123	Fixing part
				3111	Hollow cavity	4124	Spacing boss
3112	Fixing groove	413	Reinforcement piece
				312	Elastic piece	42	Voice coil
3121	Spring plate	43	Centering support plate
				3122	Connecting sheet	5	Front cover
32	First magnetic circuit system	6	Circuit board
				321	Containing groove

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 the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is 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.

Electronic product equipment, especially cell-phone class product, need have audio frequency experience concurrently usually and vibrate the sense of touch and experience the function, and audio frequency experience comes from the speaker device, and sense of touch vibration experience comes from motor device, and in improving user's audio frequency and the sense of touch of vibration experience in-process, generally set up speaker device and motor device separately respectively among the correlation technique, lead to occupation space in intelligent terminal equipment big, the not ideal scheduling problem of overall arrangement effect to intelligent terminal's user experience has been influenced. In addition, in some electronic products in the related art, the speaker device and the motor device are integrated, but the speaker device and the motor device cannot interfere with each other when working synchronously, that is, the motor device cannot be satisfied to avoid the voice coil of the speaker device, and when the electronic product falls, the motor device collides with the voice coil, and the protection of the voice coil cannot be realized.

It can be understood that in some intelligent wearable devices, under the condition that the size of the whole machine space is limited, if the vibration functions of the loudspeaker and the vibration motor can be organically combined, a large amount of space can be saved for the whole machine space. Based on the above-mentioned conception and problems, the present invention provides a sound generating device 100. The sound generating apparatus 100 may be applied to an electronic device, which may be a mobile phone, a wearable device, and the like, and is not limited herein.

The sound production device 100 integrates the loudspeaker and the vibrating motor into a whole in function, not only integrates the topological structures of two functional products, but also uses the magnetic circuit components coupled together, so that the space size of the integrated product is far smaller than the simple volume added by the two. It can be understood that, the sound generating device 100 of the present application couples the functions of the speaker sound generating device and the vibration motor together, and can realize both the function of the speaker and the vibration function of the vibration motor, and when the function of the speaker is realized, the magnetic circuit component in the product structure is also the vibrator for realizing the vibration function of the vibration motor.

Referring to fig. 1 to 6, in an embodiment of the present invention, the sound generating device 100 includes a housing 1, a coil 2, a vibrator assembly 3 and a vibration system 4, wherein, the shell 1 is provided with a mounting cavity 11, the coil 2 is arranged in the mounting cavity 11, the vibrator component 3 comprises a vibrator main body 31, a first magnetic circuit system 32 and a second magnetic circuit system 33, the vibrator main body 31 is suspended in the mounting cavity 11, the first magnetic circuit system 32 is arranged on the vibrator main body 31, and is arranged opposite to the coil 2, the second magnetic circuit system 33 is arranged at one side of the vibrator main body 31 back to the first magnetic circuit system 32, the second magnetic circuit system 33 is provided with a magnetic gap 333, the vibration system 4 is arranged in the installation cavity 11, and is located on one side of the vibration module 3 opposite to the coil 2, the vibration system 4 includes a voice coil 42 and a vibration membrane module 41 connected to the voice coil 42, the vibration membrane module 41 is fixed to the housing 1, and the voice coil 42 is inserted into the magnetic gap 333 and drives the vibration membrane module 41 to vibrate; the coil 2 drives the vibrator main body 31 to drive the first magnetic circuit system 32 and the second magnetic circuit system 33 to vibrate simultaneously, the centroid and the mass center of the vibrator component 3 are defined to be overlapped, the axis which is parallel to the vibration direction of the vibration system 4 and penetrates through the mass center is defined as a rotating shaft, and the rotating angle of the vibrator component 3 around the rotating shaft is 0-1.6 degrees.

In the present embodiment, the housing 1 of the sound generating apparatus 100 is used for mounting, fixing and supporting the coil 2, the vibrator assembly 3, the vibration system 4 and other components, that is, the housing 1 provides a mounting base for the coil 2, the vibrator assembly 3, the vibration system 4 and other components. In order to facilitate mounting and protecting the coil 2, the vibrator assembly 3, the vibration system 4, and the like, the housing 1 has a mounting cavity 11. Alternatively, the structure of the housing 1 may be a mounting case, a box, or a box with a mounting cavity 11.

It can be understood that the housing 1 may be an integral structure or a separate structure. As shown in fig. 1 to 3, the housing 1 includes a first housing and a second housing, that is, the housing 1 is separated from the first housing, and the first housing and the second housing are connected to form an integral structure. Of course, in other embodiments, the housing 1 may also be formed by an integral molding method, which is not limited herein.

Optionally, the first casing and the second casing of the casing 1 are both metal pieces, and the first casing and the second casing are in sealing fit to define the installation cavity 11, that is, the first casing and the second casing are made of a metal material, so that the whole structure of the casing 1 is made of a metal material.

It can be understood that the first shell and the second shell of the housing 1 can be made of thin steel sheets, so that the housing 1 can be designed to be thinner, the volume of the cavity in the housing 1 is greatly increased, the volumes of the vibrator component 3 and the vibration system 4 in the installation cavity 11 are effectively increased, and the acoustic performance of the sound generating device 100 is further improved. Meanwhile, the vibrator assembly 3 and the vibration system 4 are fixed in the housing 1, so that heat dissipation can be achieved through the housing 1 made of a metal material, and the heat dissipation performance of the sound generating apparatus 100 is improved.

In this embodiment, the vibrator component 3 includes the vibrator main body 31, the first magnetic circuit 32 and the second magnetic circuit 33, through hanging the vibrator main body 31 in the installation cavity 11, the vibrator main body 31 is located to the first magnetic circuit 32 to set up relatively with the coil 2, thereby after letting in electric current in the coil 2, the coil 2 can drive the vibration component 3 and take place to vibrate in the installation cavity 11, in order to realize the motor vibration function, thereby make sound generating mechanism 100 have the tactile vibration to experience the function concurrently. It can be understood that, by providing the magnetic gap 333 on the vibrator component 3 and fixing the vibrating diaphragm component 41 of the vibration system 4 to the housing 1, the voice coil 42 is inserted into the magnetic gap 333, so that the vibration system 4 and the second magnetic circuit 33 cooperate to form a speaker module, and the voice coil 42 is utilized to drive the vibrating diaphragm component 41 to vibrate to implement sound production, so that the sound production device 100 has an audio experience function.

It can be understood, coil 2 forms the vibration module with the oscillator main part 31 and the first magnetic circuit 32 cooperation of oscillator subassembly 3, in order to realize the motor vibration function, and vibration system 4 forms the speaker module with the second magnetic circuit 33 cooperation of oscillator subassembly 3, in order to realize the sound production function, thereby make sound generating mechanism 100 not only with vibration module and speaker module integration in an organic whole, realize two into one of the topological structure of two kinds of functional products of function product is experienced to the sense of touch vibration and audio frequency, still set up the coupling on the oscillator main part 31 of oscillator subassembly 3 with the magnetic circuit of speaker module (also second magnetic circuit 33), so effectively reduced the volume of sound generating mechanism 100 after the integration, also the space size of sound generating mechanism 100 after the integration is less than the volume that simple vibration module and speaker module added far away. Meanwhile, when the loudspeaker module function is realized, the magnetic circuit system in the loudspeaker module is also a part for realizing the vibration of the vibrator component 3, namely, the vibrator main body 31 of the coil 2 drives the first magnetic circuit system 32 and the second magnetic circuit system 33 to vibrate simultaneously, so that the simultaneous action of the functions of the vibration module and the loudspeaker module can be realized.

In the present embodiment, the vibrator assembly 3 has a centroid and a centroid, the centroid of the vibrator assembly 3 is a geometric center of the structural shape of the vibrator assembly 3, and the centroid of the vibrator assembly 3 is a mass center of the vibrator assembly 3. The centroid and the mass center of the vibrator assembly 3 are defined to be coincident, the axis which is parallel to the vibration direction of the vibration system 4 and penetrates through the mass center is defined as a rotating shaft, the rotating angle of the vibrator assembly 3 around the rotating shaft in the vibration process is 0-1.6 degrees, the rotating angle is smaller than or equal to 1.6 degrees by limiting the rotating angle of the vibrator assembly 3 in the vibration process, and therefore the vibrator assembly 3 is effectively prevented from colliding with the voice coil 42 in the vibration process, namely the voice coil 42 is avoided.

The sound production device 100 of the present invention is provided with the mounting cavity 11 in the housing 1, so that the coil 2, the vibrator component 3 and the vibration system 4 are fixed and protected by the mounting cavity 11, the vibrator main body 32 of the vibrator component 3 is suspended in the mounting cavity 11, the first magnetic circuit system 32 is provided in the vibrator main body 31 and is arranged opposite to the coil 2, so that the vibrator main body 31 is driven to drive the first magnetic circuit system 32 and the second magnetic circuit system 33 to vibrate by the interaction of the coil and the first magnetic circuit system 32, so as to realize the motor vibration function, so that the sound production device 100 has the vibration touch experience function, meanwhile, the second magnetic circuit system 33 is provided at the side of the vibrator main body 31 facing away from the first magnetic circuit system 32, and the second magnetic circuit system 33 is provided with the magnetic gap 333, so that the vibration diaphragm component 41 of the vibration system 4 is fixed in the housing 1, and the voice coil 42 is inserted in the magnetic gap 333, therefore, the voice coil 42 is utilized to drive the diaphragm assembly 41 to vibrate, that is, the vibration system 4 and the second magnetic circuit system 33 are matched to form a speaker module, so as to realize a sound production function, so that the sound production device 100 has an audio experience function, that is, the diaphragm assembly 3 with a motor vibration function and the speaker module are integrated into an integrated structure, the integration level of the sound production device 100 is effectively improved, and the occupied space of the sound production device 100 in the electronic equipment is saved; meanwhile, the centroid and the centroid of the vibrator assembly 3 are defined to coincide, the axis which is parallel to the vibration direction of the vibration system 4 and penetrates through the centroid is a rotating shaft, so that the vibrator assembly 3 avoids the voice coil 42 by rotating the angle of 0-1.6 degrees around the rotating shaft, the vibrator assembly 3 effectively avoids the second magnetic circuit system 33 from colliding with the voice coil 42 in the normal working vibration process, namely, the coil 2 is utilized to drive the vibrator main body 31 to vibrate, so that the vibrator assembly 3 and the vibration system 4 of the sound generating device 100 can work respectively and do not interfere with each other, the sound generating device 100 has audio experience and vibration touch experience functions, and the experience of a user is improved. In addition, sound generating mechanism 100 is when being in the operating mode that falls, and is 0 ~ 1.6 through setting up the turned angle that oscillator subassembly 3 wound the rotation axis, can effectively prevent that oscillator subassembly 3 from colliding with voice coil 42 to can ensure that voice coil 42 is not hurt when sound generating mechanism 100 falls, promote sound generating mechanism 100's use reliability.

In the present embodiment, the periphery of the diaphragm assembly 41 of the vibration system 4 is connected to the housing 1 to achieve the fixed mounting of the vibration system 4. One end of voice coil 42 is connected with vibrating diaphragm subassembly 41, and the other end of voice coil 42 hangs and locates in magnetic gap 333, so after letting in electric current in voice coil 42, voice coil 42 converts electrical energy into mechanical vibration in magnetic gap 333 to make voice coil 42 drive vibrating diaphragm subassembly 41 vibration sound production, thereby realize that mechanical energy converts into sound signal. It can be understood that the voice coil 42 in the vibration system 4 drives the diaphragm assembly 41 to vibrate in the vertical direction, and the coil 2 drives the vibrator main body 31 of the vibrator assembly 3 to drive the first magnetic circuit system 32 and the second magnetic circuit system 33 to vibrate and move in the horizontal direction, so that the vibration module and the speaker module in the sound generating device 100 can work separately and do not interfere with each other.

In an embodiment, the vibrator body 31 includes a weight holder 311 and an elastic member 312, wherein the weight holder 311 has a hollow cavity 3111, the first magnetic circuit 32 is disposed in the hollow cavity 3111 and is engaged with the weight holder 311 to form an accommodating groove 321, a portion of the coil 2 is accommodated in the accommodating groove 321, the second magnetic circuit 33 is disposed on a side of the weight holder 311 facing away from the first magnetic circuit 32, one end of the elastic member 312 is connected to the weight holder 311, and the other end of the elastic member 312 is connected to a wall of the mounting cavity 11, so that the weight holder 311 is suspended in the mounting cavity 11.

In the present embodiment, as shown in fig. 2, fig. 3, fig. 5 and fig. 6, the weight holder 311 is used for not only fixing the first magnetic circuit system 32, but also supporting and fixing the second magnetic circuit system 33, that is, the first magnetic circuit system 32 and the second magnetic circuit system 33 are integrated into a unitary structure by using the weight holder 311. It can be understood that the elastic members 312 are respectively connected to two opposite sides of the weight holder 311, so that the weight holder 311 is installed and suspended in the installation cavity 11 through the elastic members 312.

It can be understood that, through set up cavity 3111 on counter weight seat 311 to utilize cavity 3111 to fix first magnetic circuit 32 easy to assemble, and make coil 2 just to setting up with first magnetic circuit 32, so after letting in current in coil 2, be in the magnetic field that first magnetic circuit 32 formed, thereby realize that first magnetic circuit 32 of drive drives counter weight seat 311 and second magnetic circuit 33 and carry out the vibration and move. In this embodiment, the first magnetic circuit system 32 is disposed in the hollow cavity 3111 and cooperates with the weight holder 311 to form the accommodating groove 321, so that at least a portion of the coil 2 is accommodated in the accommodating groove 321, and the accommodating groove 321 is utilized to avoid the coil 2, and meanwhile, the arrangement of the weight holder 311 and the coil 2 is more compact, thereby effectively improving the space utilization.

In this embodiment, the second magnetic circuit system 33 is disposed on a side of the counterweight seat 311 opposite to the coil 2 and spaced from the vibration system 4, and the second magnetic circuit system 33 is provided with a magnetic gap 333, so that the second magnetic circuit system 33 and the vibration system 4 cooperate to form a speaker module structure, so as to implement a sound generating function. Alternatively, the speaker module may be a sound generating single structure, which is not limited herein.

In this embodiment, the hollow cavity 3111 may be a groove structure, a through groove structure, a cavity structure, or the like disposed on the weight holder 311, and is not limited herein. It can be understood that the first magnetic circuit system 32 is disposed in the hollow cavity 3111 and cooperates with the weight holder 311 to form the receiving slot 321. It will be appreciated that the weight holder 311 also serves as a weight and load bearing function, and the elastic member 312 also serves to provide a directional force for the overall movement of the weight holder 311.

It can be understood that, the counterweight seat 311 is suspended in the mounting cavity 11 by using the elastic element 312, that is, one end of the elastic element 312 is connected to the counterweight seat 311, and the other end of the elastic element 312 is connected to the cavity wall of the mounting cavity 11, so that when the coil 2 drives the counterweight seat 311 to drive the first magnetic circuit system 32 and the second magnetic circuit system 33 to synchronously vibrate, the elastic element 312 is used for providing an elastic buffer force while providing a supporting and mounting base for the counterweight seat 311, and avoiding the counterweight seat 311 from being damaged by an excessive vibration force.

In this embodiment, the elastic element 312 may be a member with an elastic expansion function, such as a spring, or other elastic members, which is not limited herein. The elastic member 312 is attached to the outer circumferential wall of the weight holder 311. The elastic member 312 may be a single structure or a plurality of separate structures, which is not limited herein.

In one embodiment, a fixing groove 3112 is disposed on a side of the weight holder 311 facing away from the coil 2, the hollow cavity 3111 penetrates through a bottom wall of the fixing groove 3112, the vibrator assembly 3 further includes a magnetic conductive plate 34 disposed in the fixing groove 3112, and the first magnetic circuit 32 and the second magnetic circuit 33 are respectively fixed on surfaces of two opposite sides of the magnetic conductive plate 34.

In this embodiment, as shown in fig. 2 to 4, by disposing the magnetic conductive plate 34 on the counterweight seat 311, the first magnetic circuit system 32 and the second magnetic circuit system 33 are respectively fixed on two opposite surfaces of the magnetic conductive plate 34, so that the second magnetic circuit system 33 is fixedly integrated on the counterweight seat 311 through the magnetic conductive plate 34, and the magnetic conductive and magnetic concentrating effects on the second magnetic circuit system 33 by using the magnetic conductive plate 34 are conveniently achieved; meanwhile, the first magnetic circuit system 32 can be more stably arranged on the counterweight seat 311 through the magnetic conductive plate 34, and the magnetic conductive and magnetic gathering effects are realized on the first magnetic circuit system 32 through the magnetic conductive plate 34.

It can be understood that, taking the speaker module as an example, when the magnetic conductive plate 34 is provided, the BL value of the speaker module is 0.19 Tm; when the magnetic conductive plate 34 is not provided, the BL value of the speaker module is 0.17 Tm. It can be seen that, after the magnetic conductive plate 34 is arranged, the BL value of the speaker module can be increased by more than 10%, and the acoustic performance of the sound generating device 100 is effectively improved. Taking the vibration module as an example, when the magnetic conduction plate 34 is arranged, the BL value of the vibration module is 0.22 Tm; when the magnetic conductive plate 34 is not provided, the BL value of the vibration module is 0.18 Tm. It can be seen that, after the magnetic conductive plate 34 is arranged, the BL value of the vibration module can be increased by more than 20%, and the acoustic performance of the sound generating device 100 is effectively improved. Meanwhile, the magnetic conductive plate 34 can effectively avoid the mutual weakening influence of the magnetic fields between the first magnetic circuit system 32 and the second magnetic circuit system 33, so that the acoustic performance of the sound generating device 100 can be further improved.

In this embodiment, as shown in fig. 2, by providing the fixing groove 3112 on the weight holder 311, the fixing groove 3112 is utilized to fix and limit the magnetic conductive plate 34, thereby improving the installation stability. It can be understood that, well cavity 3111 link up the diapire of fixed slot 3112 for magnetic conduction plate 34 is connected with first magnetic circuit 32 towards one side of fixed slot 3112 diapire, so can further improve the installation stability of first magnetic circuit 32 and counter weight seat 311, and usable magnetic conduction plate 34 realizes leading magnetic and gathering magnetic effect to first magnetic circuit 32 simultaneously. Optionally, the area of the magnetic conductive plate 34 is larger than the area of the first magnetic circuit system 32.

In one embodiment, the thickness of the magnetic conductive plate 34 is defined as d, the height of the first magnetic circuit system 32 is defined as H1, and the height of the second magnetic circuit system 33 is defined as H2, wherein (H1+ H2)/d < 2.

In this embodiment, in order to reduce the mutual weakening effect between the first magnetic circuit system 32 and the second magnetic circuit system 33, when the ratio of the sum of the height H1 of the first magnetic circuit system 32 and the height H2 of the second magnetic circuit system 33 to the thickness d of the magnetic conductive plate 34 is smaller than 2 by adjusting the thickness d of the magnetic conductive plate 34, the BL value of the speaker module is reduced to 99.8%, and the first magnetic circuit system 32 of the vibration module is reduced to 99.6%, so that the mutual weakening of magnetism between the first magnetic circuit system 32 and the second magnetic circuit system 33 can be effectively avoided, and the BL value of the sound generating device 100 is affected.

In an embodiment, a side of the magnetic conductive plate 34 facing the second magnetic circuit system 33 is flush with a side of the weight holder 311 facing the second magnetic circuit system 33. It can be understood that, such an arrangement facilitates the connection of the second magnetic circuit system 33 with the magnetic conductive plate 34, and at the same time, the portion of the second magnetic circuit system 33 beyond the magnetic conductive plate 34 is connected with the counterweight seat 311, so as to improve the connection stability of the second magnetic circuit system 33. Optionally, the area of the second magnetic circuit 33 is larger than the area of the magnetic conductive plate 34.

In an embodiment, the elastic element 312 includes two elastic pieces 3121, the two elastic pieces 3121 are symmetrically disposed on opposite sides of the counterweight seat 311, one end of each elastic piece 3121 is connected to the counterweight seat 311, and the other end of each elastic piece 3121 is connected to the cavity wall of the installation cavity 11.

In the present embodiment, as shown in fig. 2, 5 and 6, by providing the elastic member 312 as the elastic sheet 3121, on one hand, the elastic sheet 3121 can improve the installation stability of the weight seat 311, and ensure that the weight seat 311 is suspended in the installation cavity 11; on the other hand, the elastic sheet 3121 may also generate an elastic buffering force and a directional moving force against the vibration of the weight holder 311.

It can be understood that the two elastic pieces 3121 are symmetrically disposed on two opposite sides of the weight seat 311. The connecting line direction of the two elastic pieces 3121 is the same as the arrangement direction of the plurality of magnetic blocks 322, that is, the moving direction of the coil 2 driving the first magnetic circuit system 32 to drive the counterweight seat 311 and the second magnetic circuit system 33 is the same as the connecting line direction of the two elastic pieces 3121. In the present embodiment, the coil 2 drives the first magnetic circuit system 32 to drive the counterweight seat 311 and the second magnetic circuit system 33 to move in a horizontal direction.

Optionally, the shape of the elastic sheet 3121 is V-shaped, U-shaped, W-shaped or Y-shaped. It is understood that the elastic sheet 3121 may be made of metal or plastic, which is not limited herein. Optionally, the elastic sheet 3121 and the weight seat 311 are integrally formed, so that the structural strength and the connection stability can be improved.

In an embodiment, an end of the elastic sheet 3121 away from the weight seat 311 is connected to a cavity wall of the installation cavity 11 through a connecting sheet 3122. It can be understood that, as shown in fig. 2, 5 and 6, by providing the connection piece 3122, the elastic piece 3121 increases a contact area with the inner wall of the case 1 through the connection piece 3122 to improve connection stability.

In one embodiment, the first magnetic circuit system 32 includes a plurality of magnetic blocks 322. It can be understood that a plurality of magnetic blocks 322 are arranged side by side in the hollow cavity 3111 of the weight holder 311. The plurality of magnetic blocks 322 may be connected into a whole by gluing, or may be provided with a connecting member to form an integrated structure, which is not limited herein. Alternatively, the plurality of magnetic blocks 322 are arranged in the same direction as the vibration moving direction of the weight holder 311 of the vibrator assembly 3.

In an embodiment, the number of coils 2 may be one or more. Optionally, the number of the coils 2 is N, and the number of the magnetic blocks 322 is N +1, where N ≧ 1. It is understood that, this arrangement enables the first magnetic circuit system 32 to provide a sufficient magnetic field for the coil 2 to ensure that the coil 2 drives the weight holder 311 to move the second magnetic circuit system 33 in an oscillating manner.

In the embodiment, the magnetizing directions of two adjacent magnetic blocks 322 in the plurality of magnetic blocks 322 are opposite. It can be understood that, when the number of the coils 2 is multiple, the arrangement direction of the plurality of magnetic blocks 322 is the same as the arrangement direction of the plurality of coils 2, so that the plurality of magnetic blocks 322 directly face the plurality of coils 2.

In one embodiment, the second magnetic circuit system 33 includes a central magnetic circuit portion 331 and a side magnetic circuit portion 332 disposed on the transducer body 31, and the side magnetic circuit portion 332 is disposed outside the central magnetic circuit portion 331 and spaced apart from the central magnetic circuit portion 331 to form a magnetic gap 333.

In the present embodiment, as shown in fig. 2 to 6, the central magnetic path portion 331 and the side magnetic path portion 332 of the second magnetic circuit system 33 provide a magnetic field for the voice coil 42 to form the driving force. It is understood that the side magnetic path portion 332 may be a unitary annular structure, and the central magnetic path portion 331 is an annular interior of the side magnetic path portion 332 and is spaced apart from the side magnetic path portion 332 to form a magnetic gap 333. Of course, in other embodiments, the side magnetic path portion 332 may be a plurality of separate structural components, and the plurality of separate structural components are disposed at intervals around the central magnetic path portion 331, which is not limited herein.

It is understood that the side magnetic path portions 332 include two side magnetic path portions 332, two side magnetic path portions 332 are provided on both sides of the long axis side of the central magnetic path portion 331, and the extending direction of the magnetic gap 333 formed by the two side magnetic path portions 332 and the central magnetic path portion 331 coincides with the vibration moving direction of the vibrator assembly 3. It is understood that the second magnetic circuit system 33 has a major axis and a minor axis, and the two side magnetic circuit portions 332 are disposed on two major axis sides of the second magnetic circuit system 33 and located on two opposite sides of the central magnetic circuit portion 331, that is, the extending direction of the magnetic gap 333 is the same as the major axis direction of the second magnetic circuit system 33, and the extending direction of the magnetic gap 333 is the same as the vibrating moving direction of the weight holder 311 of the vibrator assembly 3.

In order to avoid the collision between the second magnetic circuit system 33 and the voice coil 42 when the coil 2 drives the weight holder 311 to drive the first magnetic circuit system 32 and the second magnetic circuit system 33 to vibrate and move along the horizontal direction, the side magnetic circuit portion 332 of the second magnetic circuit system 33 is only arranged in the long axis direction, and is not arranged in the short axis direction. In order to prevent the voice coil 42 from colliding with the central magnetic circuit portion 331, the loop shape of the voice coil 42 extends in the long axis direction, that is, an escape space is provided for the central magnetic circuit portion 331 to follow the movement of the weight holder 311.

In one embodiment, the transducer body 31 has a major axis side and a minor axis side, a gap between the major axis side of the transducer body 31 and the side wall of the mounting cavity 11 is defined as d1, and a distance between the voice coil 42 and the side wall of the magnetic gap 333 is defined as d 2; wherein d1 is not less than d 2.

In the present embodiment, as shown in fig. 3, 5 and 6, by defining the gap d1 between the vibrator assembly 3 and the cavity wall (e.g., the side cavity wall or the bottom cavity wall or the top cavity wall) of the mounting cavity 11 to be smaller than or equal to the distance d2 between the voice coil 42 and the side wall of the magnetic gap 333, collision with the voice coil 42 can be effectively avoided when the vibrator assembly 3 rotates around the rotation axis during vibration. It is understood that the distance d2 between the voice coil 42 and the side wall of the magnetic gap 333 may be the distance between the voice coil 42 and the central magnetic circuit portion 331 or the distance between the voice coil 42 and the side magnetic circuit portion 332.

Alternatively, the distance between the voice coil 42 and the central magnetic circuit portion 331 is the same as the distance between the voice coil 42 and the side magnetic circuit portion 332. When the distance between the voice coil 42 and the central magnetic circuit portion 331 and the distance between the voice coil 42 and the side magnetic circuit portion 332 are different, the gap d1 between the vibrator assembly 3 and the cavity wall (e.g., the side cavity wall or the bottom cavity wall or the top cavity wall) of the mounting cavity 11 is smaller than or equal to the distance between the voice coil 42 and the central magnetic circuit portion 331 and the distance between the voice coil 42 and the side magnetic circuit portion 332.

In one embodiment, the transducer body 31 has a long axis side and a short axis side, a gap between the long axis side of the transducer body 31 and the side wall of the mounting cavity 11 is defined as d1, and a height difference between the central magnetic circuit portion 331 and the side magnetic circuit portion 332 is defined as h1, wherein h1 ≦ d 1.

In the present embodiment, as shown in fig. 3 and 4, by defining the gap d1 between the vibrator assembly 3 and the cavity wall (e.g., the side cavity wall or the bottom cavity wall or the top cavity wall) of the mounting cavity 11 to be greater than or equal to the height difference h1 between the central magnetic circuit portion 331 and the side magnetic circuit portion 332, collision with the voice coil 42 can be effectively avoided when the vibrator assembly 3 rotates around the rotation axis during vibration.

In one embodiment, the central magnetic circuit portion 331 includes a central magnet 3311 and a central washer 3312 disposed on the vibrator body 31, the central washer 3312 is disposed on a side of the central magnet 3311 facing away from the vibrator body 31, the side magnetic circuit portion 332 includes a side magnet 3321 and a side washer 3322 disposed on the vibrator body 31, the side washer 3322 is disposed on a side of the side magnet 3321 facing away from the vibrator body 31, and a magnetizing direction of the central magnet 3311 is opposite to a magnetizing direction of the side magnet 3321.

In the present embodiment, as shown in fig. 2 to 6, the center magnet 3311 of the center magnetic circuit portion 331 and the side magnet 3321 of the side magnetic circuit portion 332 are fixed on the weight holder 311 of the diaphragm assembly 3, and a magnetic gap 333 is formed at intervals, and the center washer 3312 and the side washer 3322 are respectively stacked on the center magnet 3311 and the side magnet 3321 and are disposed opposite to each other, so that the voice coil 42 generates a high driving force in the magnetic gap 333 to drive the diaphragm assembly 41 of the vibration system 4 to move.

In the present embodiment, the ratio of the sum of the height of the side magnetic path portion 332 of the second magnetic circuit system 33 and the height H1 of the first magnetic circuit system 33 to the thickness d of the magnetic conductive plate 34 is less than 2. Optionally, the ratio of the sum of the height of the edge magnet 3321 of the edge magnetic circuit portion 332 and the height H1 of the first magnetic circuit system 32 to the thickness d of the magnetic conductive plate 34 is less than 2.

It can be understood that the short axis region of the voice coil 42 is distant from the magnetic field due to the vibration of the central magnetic path portion 331 coupled to the weight holder 311 in the long axis direction, and the short axis region of the voice coil 42 distant from the magnetic field is less than 15%, so that the Bl loss is controlled to be within 15%. It should be noted that washers can be added to the bottom of the center magnet 3311 and the side magnets 3321 to raise the BL. The long axis of the voice coil 42 is close to the central magnet 3311 as much as possible, thereby improving the utilization rate of the magnetic circuit.

In one embodiment, the vibration system 4 further includes a centering disk 43, one end of the centering disk 43 is connected to one end of the voice coil 42 away from the diaphragm assembly 41, and the other end of the centering disk 43 is connected to the housing 1.

In this embodiment, as shown in fig. 2, by providing the damper 43, on one hand, the damper 43 is used to effectively prevent the voice coil 42 from polarization and vibration, and on the other hand, the damper 43 is used to realize conduction between the voice coil 42 and an external circuit.

It is understood that the centering branch 43 may be a unitary structure, or may be two or four separate structures. In the present embodiment, the spider 43 includes two, and the two spiders 43 are disposed in the short axis direction and are respectively connected to the short axes of the voice coil 42.

In one embodiment, the housing 1 includes a middle frame 16 disposed at the periphery of the diaphragm assembly 41, the diaphragm assembly 41 includes a diaphragm 412 and a reinforcing member 413, wherein the diaphragm 412 includes a central portion 4121, a bent ring portion 4122 disposed around the central portion 4121, and a fixing portion 4123 connected to the outside of the bent ring portion 4122, the periphery of the fixing portion 4123 is connected to the inner wall of the middle frame 16, and the reinforcing member 413 is disposed at the central portion 4121; the voice coil 42 is connected to the central portion 4121 or the reinforcing member 413.

In the present embodiment, as shown in fig. 1 to fig. 3 and fig. 8, by providing the middle frame 16 on the periphery of the diaphragm assembly 41, on one hand, the diaphragm assembly 41 is fixed by using the middle frame 16, and on the other hand, the middle frame 16 is conveniently connected with the housing 1 in a sealing manner, and optionally, the middle frame 16 is connected with the housing 1 in a sealing manner or welded manner. Alternatively, the diaphragm 412 is integrally injection-molded with the middle frame 16, so that the connection strength and the sealing performance between the diaphragm assembly 41 and the middle frame 16 can be improved.

It will be appreciated that the central portion 4121 of the diaphragm 412 is structurally reinforced by the reinforcement 413 provided at the central portion 4121 of the diaphragm 412. Alternatively, the diaphragm 412 and the reinforcement 413 are integrally injection-molded. In this embodiment, the central portion 4121 of the diaphragm 412 may be a hollow structure or a flat structure, which is not limited herein.

Alternatively, the reinforcing member 413 is integrally hot press-molded with the central portion 4121. This may improve the reliability and durability of the diaphragm 412.

In this embodiment, the corrugated portion 4122 of the diaphragm 412 may be a U-shaped structure, and the corrugated portion 4122 of the diaphragm 412 has elastic recovery capability. On so setting up the basis that can provide great compliance, occupied very little vibration radiation face, effectively increased vibration sound production area. It can be understood that the corrugated portion 4122 of the diaphragm 412 is vertically disposed upward along the outer side of the corrugated portion 4122, so as to increase the contact area between the corrugated portion 4122 and the inner wall of the middle frame 16, improve the connection stability, and increase the effective sound-emitting area.

Alternatively, the reinforcing member 413 may be provided on the upper surface or the lower surface of the central portion 4121. In the present embodiment, the reinforcement 413 is connected to the lower surface of the central portion 4121, and the voice coil 42 is connected to the reinforcement 413.

In one embodiment, as shown in fig. 8, one of the corrugated ring portion 4122 and the inner wall of the middle frame 16 is provided with a limiting protrusion 4124, the other is provided with a limiting groove 161, and the limiting protrusion 4124 is limited in the limiting groove 161.

In the present embodiment, the ring-folded portion 4122 and the middle frame 16 are respectively provided with the limiting boss 4124 and the limiting groove 161, and the limiting boss 4124 is limited in the limiting groove 161, so as to improve the connection stability and the sealing effect of the ring-folded portion 4122 and the middle frame 16. It can be understood that the ring folding part 4122 is provided with a limit boss 4124, and the inner wall of the middle frame 16 is provided with a limit groove 161; or the ring folding part 4122 is provided with a limiting groove 161, and the inner wall of the middle frame 16 is provided with a limiting boss 4124; alternatively, the edge ring portion 4122 is provided with a limit groove 161 and a limit boss 4124, and the inner wall of the middle frame 16 is provided with a limit boss 4124 and a limit groove 161, which is not limited herein.

In order to realize the installation and positioning of the diaphragm assembly 41, in an embodiment, one of the middle frame 16 and the housing 1 is provided with a limiting groove 12, and the other of the middle frame 16 and the housing 1 is provided with a limiting post 162, and the limiting post 162 is limited in the limiting groove 12.

It can be understood that, as shown in fig. 2 and 8, the middle frame 16 is installed on the housing 1 to realize positioning and installation by providing the limiting columns 162 and the limiting grooves 12 on the middle frame 16 and the housing 1, respectively, so that the limiting columns 162 are limited in the limiting grooves 12.

In one embodiment, as shown in fig. 1 to 3, the sound generating apparatus 100 further includes a front cover 5, and the front cover 5 is disposed on a side of the diaphragm 412 opposite to the voice coil 42 and connected to the middle frame 16. It will be appreciated that the front cover 5 is provided so that the diaphragm 412 of the diaphragm assembly 41 is protected by the front cover 5.

In an embodiment, the inner wall of the housing 1 is convexly provided with a limit stop 13, the limit stop 13 is opposite to the edge of the reinforcement piece 413, i.e. the projection parts of the limit stop 13 and the reinforcement piece 413 along the vertical direction are overlapped, the limit stop 13 surrounds to form the through opening 14, and the voice coil 42 passes through the through opening 14 and is suspended in the magnetic gap 333.

In this embodiment, as shown in fig. 2 and fig. 3, when the sound generating apparatus 100 is applied to a wearing setting and a user is launching or swimming, when the diaphragm 412 of the diaphragm assembly 41 is affected by water pressure, the limit stop 13 may be disposed, and when the amplitude of the reinforcement piece 413 is too large, the limit stop 13 may be used to limit the movement of the central portion 4121 of the diaphragm 412, so as to effectively avoid the problems of tearing the ring-folded portion 4122 of the diaphragm 412. Meanwhile, the limiting baffle table 13 has a good waterproof effect, so that the waterproof grade of the sound generating device 100 is more than 5 ATM.

Of course, the arrangement of the limiting stop 13 is also beneficial to limiting the rotation of the counterweight seat 311 in the horizontal plane vibration process, and avoiding the collision between the second magnetic circuit system 33 and the voice coil 42.

In an embodiment, the housing 1 is further provided with a conductive metal sheet 15, one end of the conductive metal sheet 15 is provided with an inner pad 151, the inner pad 151 is exposed on one side of the limit stop 13 facing away from the ring-folded portion 4122 and is connected to the spider 43 in a welding manner, the other end of the conductive metal sheet 15 is provided with an outer pad 152, and the outer pad 152 is exposed on the outer wall of the housing 1 and is used for being connected to an external circuit.

In the present embodiment, as shown in fig. 1, fig. 2 and fig. 7, the conductive metal sheet 15 is disposed inside the casing 1, an inner pad 151 is disposed at one end of the conductive metal sheet 15, an outer pad 152 is disposed at the other end of the conductive metal sheet 15, the inner pad 151 is disposed at one side of the stopper 13 facing away from the folded ring portion 4122, and can be conveniently connected to the spider 43 in a welding manner, and the outer pad 152 is disposed on the outer wall of the casing 1 and is used for being connected to an external circuit, so as to conveniently guide the external circuit to the voice coil 42 through the conductive metal sheet 15 and the spider 43. Alternatively, the conductive metal sheet 15 and the housing 1 are integrally injection molded.

In one embodiment, as shown in fig. 1 and 2, the sound generating device 100 further includes a circuit board 6, and one end of the circuit board 6 extends into the mounting cavity 11 and is electrically connected to the coil 2. It will be appreciated that by arranging the circuit board 6 so that one end of the circuit board 6 extends into the mounting cavity 11 and is electrically connected to the coil 2, the circuit board 6 can be used to electrically connect an external circuit to the coil 2. Optionally, the circuit board 6 is a flexible circuit board, so that one end of the circuit board 6 can be attached to the bottom wall of the mounting cavity 11 of the housing 1, and the other end of the circuit board 6 is bent to extend to the outer side of the housing 1, so as to achieve conduction.

In the present application, the vibration space of the vibrator assembly 3 in the installation cavity 11 is limited in order to ensure that the voice coil 42 is not damaged by the collision of the vibrator assembly 3 and to ensure reliable operation of the speaker function and the motor vibration function. The sound generating device 100 mainly includes a falling working condition, a working condition in which the speaker and the motor work simultaneously, and a main vibration direction of the vibrator component 3 is y-axis translation (i.e. the vibrator component 3 translates along the long axis direction), and after reaching an action range, the shell 1 can limit further movement. Fig. 6 shows primarily the limitation of the rotation of the vibrator assembly 3 in the xy-plane about the z-axis. In addition, the vibrator assembly 3 is limited by the elastic sheet 3121 in translation on the x axis, rotation around the x axis and translation on the z axis. In summary, in order to ensure that the voice coil 42 is not damaged when the vibrator assembly 3 falls down, and when the speaker function and the motor vibration function work simultaneously, the voice coil is not damaged.

It can be understood that the first magnetic circuit system 32 and the second magnetic circuit system 33 are coupled to the weight holder 311, so that the vibrator assembly 3 functions as a vibrator, and the important index of the motor is to satisfy the requirement of the falling, etc., and the limitation of the movable space of the vibrator assembly 3 is particularly important. The scheme for realizing movable space limitation in the application is mainly realized by two rotatable angles and the elastic sheet 3121. The vibrator element 3 and the inner wall of the housing 1 form a gap d1 (the gap d1 may be a gap formed by the vibrator element 3 and the side wall of the housing 1, a gap formed by the vibrator element 3 and the bottom wall of the housing 1, and a gap formed by the vibrator element 3 and the stopper 13), and in general design, the gap formed by the vibrator element 3 and the side wall of the housing 1, the gap formed by the vibrator element 3 and the bottom wall of the housing 1, and the gap formed by the vibrator element 3 and the stopper 13 are equal (in practice, d1 is 0.15 mm). The range of motion of the vibrator assembly 3 is determined according to the above-described gap. When the long axis size, the short axis size, and the height size of the vibrator component 3 satisfy a certain condition, the voice coil 42 is not damaged by the vibration of the vibrator component 3. The gap formed between the voice coil 42 and the center magnet 3311 and the side magnet 3321 is d 2. In order to avoid the center magnet 3311 and the center washer 3312 thereon from rubbing against the voice coil 42 and incorporating the magnetic gap 333, the height difference h1 between the highest position of the center washer 3312 and the side washer 3322 is less than or equal to d1 (e.g., 0.15 mm).

The vibrator assembly 3 can be in a regular shape or an irregular shape, the coincidence of the centroid and the mass center of the vibrator assembly 3 is defined, and the rotation angle generated by the vibrator assembly 3 in the gap is a protection value, so that the rotation angle of the vibrator assembly 3 around a rotation axis (z axis) is 0-1.6 degrees, and the avoidance of the voice coil 42 is realized.

The invention further provides an electronic device, which comprises a device shell and the sound generating device 100, wherein the sound generating device 100 is arranged in the device shell. 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.

It is understood that the electronic device may be a mobile phone, a wearable device, etc., and is not limited herein. The device housing may be a housing of an electronic device or a housing of a wearable device, and is not limited herein.

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 shell is provided with a mounting cavity;

the coil is arranged in the mounting cavity;

2. The sound generating apparatus according to claim 1, wherein the vibrator body includes:

3. The sound generating apparatus as claimed in claim 2, wherein a fixing groove is formed on a side of the weight holder facing away from the coil, the hollow cavity extends through a bottom wall of the fixing groove, the vibrator assembly further comprises a magnetic conductive plate disposed in the fixing groove, and the first magnetic circuit system and the second magnetic circuit system are respectively fixed to surfaces of two opposite sides of the magnetic conductive plate.

4. The apparatus according to claim 3, wherein a side of the magnetic conductive plate facing the second magnetic circuit system is flush with a side of the counterweight seat facing the second magnetic circuit system.

5. The sounding device according to claim 2, wherein the elastic member comprises two elastic pieces, the two elastic pieces are symmetrically disposed on two opposite sides of the counterweight seat, one end of each elastic piece is connected to the counterweight seat, and the other end of each elastic piece is connected to a cavity wall of the installation cavity.

6. The sounding device according to claim 5, wherein the shape of the elastic sheet is V-shaped, U-shaped, W-shaped or Y-shaped;

7. The sound generating apparatus as claimed in claim 1, wherein the second magnetic circuit system includes a central magnetic circuit portion and a side magnetic circuit portion provided to the vibrator body, the side magnetic circuit portion being provided outside the central magnetic circuit portion and spaced from the central magnetic circuit portion to form the magnetic gap.

8. The sound generating apparatus as claimed in claim 7, wherein the vibrator body has a major axis side and a minor axis side, a gap between the major axis side of the vibrator body and the side wall of the mounting cavity is defined as d1, and a height difference between the central magnetic circuit portion and the side magnetic circuit portion is defined as h1, wherein h1 ≦ d 1.

9. The sound generating apparatus according to claim 7, wherein said side magnetic path portions include two side magnetic path portions, two of said side magnetic path portions being provided on both sides of a long axis side of said central magnetic path portion, an extension direction of said magnetic gap formed by said two side magnetic path portions and said central magnetic path portion being coincident with a vibration moving direction of said vibrator assembly;

10. The sound generating apparatus according to any one of claims 1 to 9, wherein the vibration system further comprises a damper, one end of the damper is connected to an end of the voice coil remote from the diaphragm assembly, and the other end of the damper is connected to the housing.

11. The sound generating apparatus of claim 10, wherein the housing includes a center frame disposed at an outer periphery of the diaphragm assembly, and the diaphragm assembly includes:

a reinforcement member provided at the central portion;

12. The sounding device according to claim 11, wherein a limit stop is protruded from an inner wall of the housing, the limit stop is opposite to an edge of the reinforcement, the limit stop forms a through opening around the reinforcement, and the voice coil is suspended in the magnetic gap through the through opening.

13. The sounding device according to claim 12, wherein a conductive metal sheet is further disposed in the housing, an inner pad is disposed at one end of the conductive metal sheet, the inner pad is exposed at a side of the limiting stop platform opposite to the hinge portion and is connected to the centering branch sheet in a welded manner, an outer pad is disposed at the other end of the conductive metal sheet, and the outer pad is exposed at an outer wall of the housing and is used for connecting to an external circuit.

14. The sound generating apparatus as claimed in claim 11, wherein the diaphragm is integrally injection-molded with the reinforcing member;

15. An electronic device comprising a device housing and a sound generating device according to any one of claims 1 to 14, wherein the sound generating device is provided in the device housing.