CN114501250A

CN114501250A - Electronic device

Info

Publication number: CN114501250A
Application number: CN202111678201.3A
Authority: CN
Inventors: 郎贤忠; 刘松; 蔡晓东
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-05-13
Anticipated expiration: 2041-12-31
Also published as: CN114501250B

Abstract

The invention discloses electronic equipment which comprises a machine shell and a sound generating device, wherein the sound generating device is arranged in an installation cavity of the machine shell and comprises a magnetic circuit system and a vibration system, the magnetic circuit system is arranged in a hollow mode to limit an accommodating space, the vibration system comprises a vibrating diaphragm assembly, a voice coil and a framework, the vibrating diaphragm assembly is located in the accommodating space, the voice coil is inserted into a magnetic gap of the magnetic circuit system, one end of the framework is connected with the vibrating diaphragm assembly, and the other end of the framework extends into the magnetic gap and is connected with the voice coil; wherein, be equipped with the sound outlet on the lateral wall of casing, sound generating mechanism and the cooperation of the interior perisporium of installation cavity prescribe a limit to the side sound channel that communicates with the sound outlet. According to the electronic equipment provided by the invention, the vibration radiation surface of the sound generating device is placed in the middle of the magnetic circuit system, and the voice coil is connected with the vibration radiation surface through the framework to transfer the motion load, so that the thickness size of the sound generating device is greatly reduced, the high-frequency resonance is effectively reduced, the acoustic performance is improved, and the processing and the assembly are convenient.

Description

Electronic device

Technical Field

The invention relates to the technical field of electroacoustic conversion, in particular to electronic equipment.

Background

With the rapid development of science and technology, people have higher and higher requirements on the tone quality of electronic equipment, the requirements on the electronic equipment are not limited to the playing of video and audio, and the requirements on the tone quality and the reliability of sound played by the electronic equipment are higher. The sounding device in the electronic device is influenced by the appearance structure of the electronic device, and the volume of the sounding device is smaller and smaller. The sound generating device is an important and indispensable functional component of the electronic device, and is an important part of the light and thin design of the electronic device, so the light and thin design of the sound generating device is very important. However, when the electronic device in the prior art is designed in a miniaturized size, the problem that the sound production performance of the sound production device needs to be sacrificed generally exists, and the sound production device needs to be designed in a more complex structure in order to meet the requirement of the miniaturized design, so that the practical performance is greatly reduced.

Disclosure of Invention

The invention mainly aims to provide electronic equipment, and aims to provide the electronic equipment capable of effectively reducing the thickness of a product.

To achieve the above object, the present invention provides an electronic device, including:

the device comprises a machine shell, a first connecting piece and a second connecting piece, wherein an installation cavity is arranged in the machine shell; and

the sound generating device is arranged in the installation cavity and comprises a magnetic circuit system and a vibration system, the magnetic circuit system is provided with a magnetic gap, the magnetic circuit system is arranged in a hollow mode to limit an accommodating space, the vibration system comprises a vibrating diaphragm assembly, a voice coil and a framework, the vibrating diaphragm assembly is located in the accommodating space, the voice coil is inserted into the magnetic gap, one end of the framework is connected with the vibrating diaphragm assembly, and the other end of the framework extends into the magnetic gap and is connected with the voice coil;

the side wall of the casing is provided with a sound outlet, and the sound generating device is matched with the inner peripheral wall of the mounting cavity to define a side sound outlet channel communicated with the sound outlet.

In one embodiment, a portion of the inner peripheral wall of the mounting chamber opposite to the diaphragm assembly is provided with a sound guide wall, and the sound guide wall is spaced from the diaphragm assembly to define the side sound outlet channel.

In one embodiment, the sound generating device is disposed obliquely relative to the sound guide wall, and the distance between the sound generating device and the sound guide wall gradually increases along the flowing direction of the airflow.

In one embodiment, the sound guide wall is provided with a sound guide surface, and the sound guide surface extends obliquely towards the direction far away from the sound generating device along the flowing direction of the airflow.

In an embodiment, a side of the sound guide wall close to the sound outlet is provided with a concave portion which is concave towards a direction far away from the sound generating device.

In one embodiment, the magnetic circuit system comprises:

a central magnetic circuit portion which is arranged in a hollow manner to define the accommodating space;

a side magnetic path portion provided on an outer periphery of the central magnetic path portion and spaced apart from the central magnetic path portion to define the magnetic gap; and

a yoke to which the center magnetic path portion and the side magnetic path portions are fixed, respectively;

the central magnetic circuit part is provided with a first avoidance port, and the framework penetrates through the first avoidance port to extend into the magnetic gap and is connected with the voice coil.

In one embodiment, the central magnetic circuit portion includes a first long side portion and a first short side portion arranged in sequence, the first long side portion and the first short side portion are separately arranged and enclose to form the accommodating space, and the first long side portion and the adjacent first short side portion are arranged at an interval to define the first avoidance opening;

and/or the side magnetic circuit part comprises a second long side part and a second short side part which are sequentially arranged, the second long side part and the second short side part are separately arranged, and the second long side part and the adjacent second short side part are arranged at intervals to limit a second avoidance port communicated with the first avoidance port.

In one embodiment, the side magnetic circuit part comprises a first side magnet, a side washer and a second side magnet which are sequentially stacked, the first side magnet and the second side magnet are magnetized along the vertical direction and have opposite magnetizing directions, and the second side magnet is fixed on the magnetic yoke;

and/or the central magnetic circuit part comprises a first central magnet, a central washer and a second central magnet which are sequentially stacked, the first central magnet and the second central magnet are magnetized in the vertical direction, the magnetizing directions of the first central magnet and the second central magnet are opposite, and the second central magnet is fixed on the magnetic yoke.

In one embodiment, the bobbin includes a supporting portion and an extending portion, the supporting portion is disposed in an annular shape, one end of the supporting portion is connected to the diaphragm assembly, the extending portion is disposed at the other end of the supporting portion, and the extending portion extends into the magnetic gap and is connected to the voice coil.

In one embodiment, the support portion and the extension portion are formed as an integral molding;

or, the support part and the extension part are welded or bonded.

In an embodiment, the sound generating device further comprises a centering branch piece, the inner end of the centering branch piece is connected with the framework, the centering branch piece is provided with an inner bonding pad, and the lead part of the voice coil is welded with the inner bonding pad.

In one embodiment, the outer end of the centering branch piece is fixed on the magnetic circuit system;

or, the sound generating device further comprises a cover plate, the magnetic circuit system and the vibration system are arranged in the cover plate, and the outer end of the centering support piece is fixed on the cover plate.

In one embodiment, the magnetic circuit system is arranged in a square shape;

the number of the centering branch pieces is two, avoidance ports are formed in at least one pair of diagonal positions of the magnetic circuit system, one centering branch piece is arranged in each avoidance port, and two ends of each centering branch piece are respectively connected with the framework and the cover plate; or, the number of the centering branch pieces is four, avoidance ports are arranged at four diagonal positions of the magnetic circuit system, one centering branch piece is arranged in each avoidance port, and two ends of each centering branch piece are respectively connected with the framework and the cover plate.

In an embodiment, an extension portion is disposed on a periphery of the bobbin, the extension portion extends into the magnetic gap and is connected to the voice coil, the number of the spider pieces is the same as the number of the extension portion, and the plurality of the spider pieces and the plurality of the extension portion are arranged in a one-to-one correspondence manner.

In one embodiment, one end of the extension portion connected to the voice coil includes a first fixing portion and a second fixing portion, the first fixing portion is formed in a circular arc shape and connected to the voice coil, the second fixing portion is formed in a long strip shape, and the inner pad of the spider is fixed to the second fixing portion.

In one embodiment, the diaphragm assembly includes a diaphragm and a dome, the dome is connected to the diaphragm and located at the center of the diaphragm, one end of the bobbin is connected to the dome, and the other end of the bobbin extends into the magnetic gap and is connected to the voice coil.

In one embodiment, in the vertical direction, a distance between a top surface of the dome and the bottom wall of the accommodating space is smaller than a distance between a top surface of the magnetic circuit system and the bottom wall of the accommodating space.

In an embodiment, the sound generating device further includes a cover plate, the cover plate is disposed on the magnetic circuit system, at least a portion of the cover plate is formed as a plastic part, and an edge portion of the diaphragm is connected to the plastic part.

In an embodiment, the edge portion of the diaphragm has a plurality of fixing protrusions distributed at intervals, the plastic part has a plurality of fixing grooves, and each fixing protrusion is fixed in the corresponding fixing groove;

and/or the cover plate comprises a metal cover plate and the plastic part which are integrally formed by injection molding, and the metal cover plate is covered on the magnetic circuit system;

and/or the dome and the framework are formed into an integrally formed metal piece.

In one embodiment, the edge portion of the diaphragm and the plastic part are integrally injection molded;

or the edge part of the vibrating diaphragm and the plastic part are integrally hot-pressed and molded;

or the edge part of the vibrating diaphragm is connected with the plastic part in an adhesive mode.

According to the electronic equipment in the technical scheme, the installation cavity is arranged in the casing, so that the sound generating device can be conveniently installed, fixed and protected by the installation cavity, the sound outlet is formed in the side wall of the casing, the sound generating device is matched with the inner peripheral wall of the installation cavity to define the side sound outlet channel communicated with the sound outlet, and the electronic equipment with the side sound outlet structure is formed; meanwhile, a magnetic gap is arranged in a magnetic circuit system of the sound generating device, and the magnetic circuit system is arranged in a hollow mode, so that an accommodating space is defined in the middle of the magnetic circuit system, a vibrating diaphragm assembly of the vibrating system is accommodated in the accommodating space of the magnetic circuit system, namely, a vibration radiation surface is placed in the middle of the magnetic circuit system, the thickness of the magnetic circuit system is parallel to the vibration height of the vibrating diaphragm assembly, the thickness size of the power generating sub-device can be reduced, the structure of the sound generating device can be simplified due to the fact that the magnetic circuit system is arranged on the periphery of the vibrating diaphragm assembly, and processing and assembling are facilitated; and insert the voice coil loudspeaker voice coil and locate in the magnetic gap, one end through the skeleton links to each other with the vibrating diaphragm subassembly, the other end of skeleton stretches into the magnetic gap, and link to each other with the voice coil loudspeaker voice coil, thereby utilize the skeleton to be connected the voice coil loudspeaker voice coil with the vibration radiation face of vibrating diaphragm subassembly, the transmission motion load, utilize the skeleton to improve torsional rigidity, thereby effectively reduce high-frequency resonance, improve acoustic performance, and sound generating mechanism's vibrating diaphragm subassembly is placed in magnetic circuit's accommodation space, can effectively reduce sound generating mechanism's size, thereby realize electronic equipment's frivolousization design.

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 cross-sectional view of an electronic device according to an embodiment of the invention;

FIG. 2 is a schematic structural diagram of a 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 generator according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a sound generating device with a cover plate and a diaphragm removed according to an embodiment of the present invention;

FIG. 6 is a schematic structural view of the sound generating device with the cover plate and the magnetic circuit removed in an embodiment of the present invention;

FIG. 7 is an exploded view of FIG. 6;

FIG. 8 is a schematic cross-sectional view illustrating the connection between the cover plate and the diaphragm assembly according to an embodiment of the present invention;

FIG. 9 is an enlarged schematic view at A in FIG. 8;

fig. 10 is a partially exploded view of a vibration system in accordance with an embodiment of the present 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 clearly and completely described below 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.

The invention provides an electronic device 600. It is understood that the electronic device 600 may be a speaker, a headset, a mobile phone, etc., and is not limited thereto.

Referring to fig. 1 to 10, in an embodiment of the present invention, the electronic device 600 includes a chassis 500 and a sound generating device 100, wherein an installation cavity 501 is disposed in the chassis 500, the sound generating device 100 is disposed in the installation cavity 501, the sound generating device 100 includes a magnetic circuit system 1 and a vibration system 2, the magnetic circuit system 1 is provided with a magnetic gap 11, the magnetic circuit system 1 is hollow to define an accommodation space 121, the vibration system 2 includes a diaphragm assembly 21, a voice coil 22 and a framework 23, the diaphragm assembly 21 is disposed in the accommodation space 121, the voice coil 22 is inserted into the magnetic gap 11, one end of the framework 23 is connected to the diaphragm assembly 21, and the other end of the framework 23 extends into the magnetic gap 11 and is connected to the voice coil 22; wherein, the side wall of the casing 500 is provided with a sound outlet 502, and the sound generating device 100 cooperates with the inner peripheral wall of the installation chamber 501 to define a side sound outlet channel 550 communicated with the sound outlet 502.

In the present embodiment, as shown in fig. 1, the casing 500 may be a housing or a casing of the electronic device 600, and the sound generating device 100 is an important and indispensable functional component of the electronic device 600. It will be appreciated that the installation chamber 501 is provided in the cabinet 500, thereby facilitating the installation, fixation and protection of the sound generating device 100 by the installation chamber 501. Through being equipped with sound outlet 502 with installation cavity 501 intercommunication on the lateral wall of casing 500 for sound generating mechanism 100 cooperates with the interior perisporium of installation cavity 501 and defines the side sound channel 550 with sound outlet 502 intercommunication, thereby transmits the sound that sound generating mechanism 100 sent to sound outlet 502 via side sound channel 550, and is passed sound from installation cavity 501 to the outside smoothly by sound outlet 502.

It can be understood that, the sound generating apparatus 100 is disposed in the installation chamber 501, so that the diaphragm assembly 21 of the sound generating apparatus 100 cooperates with the inner peripheral wall of the installation chamber 501 to define the side sound outlet channel 550 communicated with the sound outlet 502, that is, the sound outlet 502 is not directly opposite to the diaphragm assembly 21, but is located on the side of the sound generating apparatus 100, so that the electronic device 600 forms a side sound outlet structure, and the sound emitting effect of the electronic device 600 is improved.

In this embodiment, the magnetic circuit system 1 and the vibration system 2 constitute a main structure of the sound generating apparatus 100, a magnetic gap 11 is disposed in the magnetic circuit system 1, the voice coil 22 of the vibration system 2 is inserted into the magnetic gap 11, when the voice coil 22 is connected to an external power source, the voice coil 22 is used to transmit electric energy to the magnetic gap 11 of the magnetic circuit system 1, and under the action of magnetic lines of force generated by the magnetic gap 11, the voice coil 22 moves up and down, that is, the magnetic field generated by the magnetic circuit system 1 is used to convert the electric energy into mechanical energy, so that the voice coil 22 vibrates.

It can be understood that magnetic circuit 1 is a hollow setting, and defines accommodation space 121, through locating vibrating diaphragm assembly 21 of vibration system 2 in accommodation space 121, also place the vibration radiation surface of vibrating diaphragm assembly 21 in the middle of magnetic circuit 1, thereby effectively reduce the thickness dimension of sound generating mechanism 100, and utilize one end of skeleton 23 to link to each other with vibrating diaphragm assembly 21, the other end of skeleton 23 stretches into magnetic gap 11, and links to each other with voice coil 22, so when voice coil 22 takes place the vibration, drive vibrating diaphragm assembly 21 through skeleton 23 and vibrate.

In this embodiment, after receiving an externally varying alternating current signal through the voice coil 22 disposed in the magnetic gap 11, the voice coil 22 is driven by the magnetic field force of the magnetic circuit system 1 to perform a reciprocating motion of cutting magnetic lines of force, so that the voice coil 22 moves up and down, and the framework 23 drives the diaphragm assembly 21 of the vibration system 2 to vibrate and generate sound. It can be understood that the voice coil 22 is connected with the vibration radiation surface of the diaphragm assembly 21 through the framework 23, the motion load is transmitted, and the torsional rigidity is improved by the framework 23, so that the high-frequency resonance is effectively reduced, and the acoustic performance is improved.

It can be understood that, by defining the accommodating space 121 in the middle of the magnetic circuit system 1 and accommodating the diaphragm assembly 21 in the accommodating space 121, the thickness of the magnetic circuit system 1 and the vibration height of the diaphragm assembly 21 can be made parallel, rather than being added, and the thickness dimension of the sound generating device 100 can be reduced. Meanwhile, the diaphragm assembly 21 and the portion of the magnetic circuit system 1 around the accommodating space 121 form a short sound-emitting channel, which is beneficial to vibration propagation.

The electronic device 600 of the present invention is provided with the mounting chamber 501 in the chassis 500, so that the mounting chamber 501 is conveniently utilized to mount, fix and protect the sound generating device 100, and the side wall of the chassis 500 is provided with the sound outlet 502, so that the sound generating device 100 cooperates with the inner peripheral wall of the mounting chamber 501 to define the side sound outlet channel 550 communicated with the sound outlet 502, thereby forming the electronic device 600 of the side sound outlet structure; meanwhile, the magnetic gap 11 is arranged in the magnetic circuit system 1 of the sound generating device 100, and the magnetic circuit system 1 is arranged in a hollow manner, so that the accommodating space 121 is defined in the middle of the magnetic circuit system 1, the diaphragm assembly 21 of the vibration system 2 is accommodated in the accommodating space 121 of the magnetic circuit system 1, that is, the vibration radiation surface is placed in the middle of the magnetic circuit system 1, so that the thickness of the magnetic circuit system 1 is parallel to the vibration height of the diaphragm assembly 21, and the thickness of the electronic power generator 600 can be reduced; and the voice coil 22 is inserted into the magnetic gap 11, and is connected with the vibrating diaphragm assembly 21 through one end of the framework 23, and the other end of the framework 23 extends into the magnetic gap 11 and is connected with the voice coil 22, so that the framework 23 is used for connecting the voice coil 22 with the vibration radiation surface of the vibrating diaphragm assembly 21, the motion load is transmitted, the torsional rigidity is improved by the framework 23, the high-frequency resonance is effectively reduced, the acoustic performance is improved, and the processing and the assembly of the sound generating device 100 are convenient. And the diaphragm assembly 21 of the sound generating device 100 is placed in the accommodating space 121 of the magnetic circuit system 1, so that the size of the sound generating device 100 can be effectively reduced, and the light and thin design of the electronic device 600 can be realized.

In an embodiment, as shown in fig. 1, the housing 500 includes a first housing 510 and a second housing 520, the first housing 510 and the second housing 520 cooperate to define the mounting chamber 501, the sound outlet 502 may be a side wall provided at one of the first housing 510 and the second housing 520, or the sound outlet 502 is enclosed by the first housing 510 and the second housing 520, which is not limited herein.

In the present embodiment, the casing 500 is configured as two parts, i.e., the first casing 510 and the second casing 520, so as to facilitate the assembly, disassembly, maintenance or replacement of the sound generating device 100. It can be appreciated that the first housing 510 and the second housing 520 of the casing 500 may adopt a snap connection, a plug fit, a screw connection or a pin connection, so as to improve the convenience of assembling and disassembling the electronic device 600.

It is understood that at least one of the first and

second housings

510 and 520 is formed with a groove or a mounting space such that the first housing 510 and the second housing 520 cooperate to define the mounting chamber 501. By enclosing the sound outlet 502 by the first housing 510 and the second housing 520, when the sound generating apparatus 100 is installed in the installation chamber 501, the sound generating apparatus 100 cooperates with the inner peripheral wall of the installation chamber 501 to define the side sound outlet channel 550 communicated with the sound outlet 502, so that the sound outlet 502 is located at one side of the diaphragm assembly 21 of the sound generating apparatus 100.

In one embodiment, as shown in fig. 1, the first casing 510 and/or the second casing 520 is provided with a fixing table 530, and the sound generating device 100 is fixedly supported on the fixing table 530 and is in sealing engagement with the fixing table 530. It is understood that by providing the stationary stage 530, the stationary stage 530 may be utilized to mount, secure, and support the sound generating device 100.

In the present embodiment, the sound generating device 100 is fixedly supported on the fixing stage 530 such that the sound generating device 100 cooperates with the inner circumferential wall of the installation chamber 501 to define a side sound outlet channel 550 communicating with the sound outlet 502.

In one embodiment, the portion of the inner peripheral wall of the mounting chamber 501 opposite the diaphragm assembly 21 is provided with a sound guiding wall 540, and the sound guiding wall 540 is spaced apart from the diaphragm assembly 21 to define a side sound outlet channel 550.

In this embodiment, as shown in fig. 1, the bottom wall of the first casing 510 of the chassis 500 faces the diaphragm assembly 21 of the sound generating apparatus 100, such that the part of the bottom wall of the first casing 510 facing the diaphragm assembly 21 forms a sound guiding wall 540, and the sound guiding wall 540 is spaced from the diaphragm assembly 21, such that the sound guiding wall 540 and the diaphragm assembly 21 enclose to form a side sound outlet channel 550.

In one embodiment, the sound generating device 100 is disposed obliquely with respect to the sound guiding wall 540, and the distance between the sound generating device 100 and the sound guiding wall 540 gradually increases along the flowing direction of the airflow.

In this embodiment, as shown in fig. 1, the sound generating device 100 is installed in the installation chamber 501, such that the sound generating device 100 and the inner peripheral wall of the installation chamber 501 enclose to form a front sound cavity and a rear sound cavity at an interval, the front sound cavity is communicated with the sound outlet 502, and at this time, the side sound outlet channel 550 formed by the enclosure of the diaphragm assembly 21 and the sound guide wall 540 of the sound generating device 100 is located in the front sound cavity.

It can be understood that, by arranging the sound generating device 100 obliquely relative to the sound guide wall 540, the distance between the sound generating device 100 and the sound guide wall 540 gradually increases along the flowing direction of the air flow, so that the flowing resistance of the air flow can be reduced, and the sound generating effect of the sound generating device 100 is improved.

In one embodiment, the sound guiding wall 540 is provided with a sound guiding surface 541, and the sound guiding surface 541 extends obliquely in a direction away from the sound generating device 100 along the flowing direction of the airflow. It can be understood that, by arranging such that the volume of the front sound cavity formed by the sound guide surface 541 and the diaphragm assembly 21 of the sound generating apparatus 100 is increased, the flow resistance of the air flow can be reduced, and the sound generating effect of the electronic device 600 can be improved.

In one embodiment, a side of the sound guide wall 540 near the sound outlet 502 is provided with a recess 542 recessed toward a direction away from the sound generating device 100.

In the present embodiment, as shown in fig. 1, the recessed portion 542 is disposed on the side of the sound guide wall 540 close to the sound outlet 502, so that the recessed portion 542 effectively increases the volume of the front sound cavity, reduces the flow resistance of the air flow, and improves the sound production effect of the electronic device 600.

In one embodiment, the magnetic circuit system 1 includes a central magnetic circuit portion 12, a side magnetic circuit portion 13 and a magnetic yoke 14, wherein the central magnetic circuit portion 12 is disposed in a hollow manner to define a receiving space 121, the side magnetic circuit portion 13 is disposed at an outer periphery of the central magnetic circuit portion 12 and is spaced apart from the central magnetic circuit portion 12 to define a magnetic gap 11, and the central magnetic circuit portion 12 and the side magnetic circuit portion 13 are respectively fixed to the magnetic yoke 14; wherein, the central magnetic circuit portion 12 is provided with a first avoiding opening 122, and the bobbin 23 passes through the first avoiding opening 122 to extend into the magnetic gap 11 and is connected to the voice coil 22.

In the present embodiment, as shown in fig. 2 to 5, the central magnetic circuit portion 12 and the side magnetic circuit portion 13 of the magnetic circuit system 1 are both fixed to the side of the magnetic yoke 14 facing the diaphragm assembly 21, the side magnetic circuit portion 13 is located on the outer peripheral side of the central magnetic circuit portion 12, and the side magnetic circuit portion 13 is spaced from the central magnetic circuit portion 12 to define the magnetic gap 11, so that a stronger magnetic field is formed in the magnetic gap 11 by the central magnetic circuit portion 12 and the side magnetic circuit portion 13 to improve the driving force of the voice coil 22 inserted in the magnetic gap 11. The middle of the central magnetic circuit portion 12 is hollow, so that an accommodating space 121 is formed in the middle of the central magnetic circuit portion 12, the diaphragm assembly 21 is accommodated in the accommodating space 121, the thickness of the magnetic circuit system 1 is parallel to the vibration height of the diaphragm assembly 21, and the thickness of the sound generating device 100 can be reduced.

It is understood that the central magnetic path portion 12 of the magnetic circuit system 1 may be a unitary structure, and the central magnetic path portion 12 may be a plate-shaped structure, and a hollow structure is disposed in the middle of the plate-shaped structure, i.e. the central magnetic path portion 12 is a ring-shaped plate-shaped structure, which is not limited herein. Of course, in other embodiments, the central magnetic path portion 12 may also be a separate structure, for example, the central magnetic path portion 12 is composed of a plurality of portions, and the plurality of portions surround the central magnetic path portion 12 with a hollow structure in the middle.

In the present embodiment, the first avoidance hole 122 is provided in the central magnetic path portion 12, so that the first avoidance hole 122 communicates with the magnetic gap 11, thereby facilitating the bobbin 23 to extend into the magnetic gap 11 through the first avoidance hole 122 and to be connected to the voice coil 22. It is understood that the first avoiding opening 122 may be a through hole or an opening or a through groove structure passing through the central magnetic path portion 12 and communicating the accommodating space 121 and the magnetic gap 11, which is not limited herein.

It will be appreciated that the side magnetic path portions 13 may be of unitary construction, the side magnetic path portions 13 may alternatively be of annular construction disposed around the central magnetic path portion 12, with the inner ring of the side magnetic path portions 13 being spaced from the outer peripheral wall of the central magnetic path portion 12 to form the magnetic gap 11. Of course, in other embodiments, the side magnetic path portion 13 may also be a separate structure, for example, the side magnetic path portion 13 is composed of a plurality of strip-shaped structures, and the plurality of strip-shaped structures are disposed around the central magnetic path portion 12 and spaced from the outer peripheral wall of the central magnetic path portion 12, which is not limited herein.

In an embodiment, the central magnetic circuit portion 12 includes a first long side portion 123 and a first short side portion 124 sequentially arranged, the first long side portion 123 and the first short side portion 124 are separately disposed and enclose to form the accommodating space 121, and the first long side portion 123 is spaced apart from the adjacent first short side portion 124 to define the first avoiding opening 122.

In the present embodiment, as shown in fig. 3 and 5, the central magnetic path portion 12 of the magnetic path system 1 is provided as a separate body, and the central magnetic path portion 12 includes a first long side portion 123 and a first short side portion 124 which are sequentially arranged. It is understood that the first long side portion 123 and the first short side portion 124 include at least one. Alternatively, the first long side parts 123 and the first short side parts 124 include a plurality of first long side parts 123 and a plurality of first short side parts 124, which are alternately arranged and enclose the accommodating space 121, that is, the plurality of first long side parts 123 and the plurality of first short side parts 124 are alternately arranged to form a hollow ring-shaped structure. And adjacent first long side portions 123 and first short side portions 124 are spaced apart to define a first avoidance opening 122.

It is understood that the first long side portion 123 and the first short side portion 124 of the central magnetic circuit portion 12 are completely broken to define a first avoiding opening 122 communicating the accommodating space 121 and the magnetic gap 11, so that one end of the bobbin 23 is connected to the diaphragm assembly 21 located in the accommodating space 121, and the other end of the bobbin 23 extends into the magnetic gap 11 through the first avoiding opening 122 and is connected to the voice coil 22.

Alternatively, the first long side portion 123 and the first short side portion 124 of the central magnetic path portion 12 enclose to form a polygonal ring structure such as a circular ring, a rectangular ring, etc., which is not limited herein. In this embodiment, the length of the first long side 123 may be the same as or different from the length of the first short side 124, and is not limited herein.

In the present embodiment, as shown in fig. 5, the first long side portion 123 and the first short side portion 124 of the central magnetic path portion 12 are provided with chamfers at the ends adjacent to the first avoiding opening 122, so that the extending portion 232 of the framework 23 can be conveniently avoided by the chamfers, which can increase the area of the central magnetic path portion 12 and avoid the interference influence of the central magnetic path portion 12 on the extending portion 232 of the framework 23.

In one embodiment, the side magnetic path portion 13 includes second long side portions 131 and second short side portions 132 arranged in sequence, the second long side portions 131 and the second short side portions 132 are separately disposed, and the second long side portions 131 are spaced apart from the adjacent second short side portions 132 to define second avoidance ports 133 communicating with the first avoidance ports 122.

In the present embodiment, as shown in fig. 3 and 5, the side magnetic path portion 13 of the magnetic path system 1 is provided as a separate body, and the side magnetic path portion 13 includes a second long side portion 131 and a second short side portion 132 arranged in sequence. It is understood that the second long side portion 131 and the second short side portion 132 include at least one. Alternatively, the second long side portion 131 and the second short side portion 132 include a plurality of portions, and the plurality of second long side portions 131 and the plurality of second short side portions 132 are alternately arranged and are disposed around the central magnetic path portion 12, that is, the plurality of second long side portions 131 and the plurality of second short side portions 132 are alternately arranged to form a ring structure. And adjacent second long side portions 131 and second short side portions 132 are spaced apart to define a second escape opening 133.

It will be appreciated that the second long side portion 131 and the second short side portion 132 of the side magnetic path portion 13 are provided as complete interruptions to define a second avoiding opening 133 communicating with the magnetic gap 11. Alternatively, the second long side portion 131 and the second short side portion 132 of the side magnetic path portion 13 enclose to form a polygonal ring-shaped structure such as a circular ring, a rectangular ring, etc., which is not limited herein. In this embodiment, the length of the second long side 131 may be the same as or different from the length of the second short side 132, and is not limited herein.

In this embodiment, the side magnetic path portion 13 and the central magnetic path portion 12 of the magnetic circuit system 1 are both separately disposed, and at this time, the first long side portion 123 of the central magnetic path portion 12 corresponds to and is spaced apart from the second long side portion 131 of the side magnetic path portion 13, and the first short side portion 124 of the central magnetic path portion 12 corresponds to and is spaced apart from the second short side portion 132 of the side magnetic path portion 13, so that the second avoiding opening 133 is correspondingly communicated with the first avoiding opening 122.

In one embodiment, the side magnetic circuit portion 13 includes a first side magnet 134, a side washer 135 and a second side magnet 136 stacked in sequence, the first side magnet 134 and the second side magnet 136 are magnetized in opposite directions along a vertical direction, and the second side magnet 136 is fixed to the yoke 14.

In this embodiment, the side magnetic circuit portion 13 may be integrally disposed or separately disposed, and when the side magnetic circuit portion 13 is disposed as an integral structure, the side magnetic circuit portion 13 includes a first side magnet 134, a side washer 135 and a second side magnet 136 that are sequentially stacked; when the side magnetic circuit portion 13 is separately disposed, that is, the side magnetic circuit portion 13 includes the second long side portion 131 and the second short side portion 132 which are sequentially arranged, and at this time, the second long side portion 131 and the second short side portion 132 both include the first side magnet 134, the side washer 135 and the second side magnet 136 which are sequentially stacked, which is not limited herein.

It is understood that the first side magnet 134 and the second side magnet 136 of the side magnetic circuit portion 13 may be permanent magnets, and the side washer 135 of the side magnetic circuit portion 13 may be a magnetic conductive plate. The shape profile of the edge washer 135 is adapted to the shape profile of the first edge magnet 134 and the second edge magnet 136. With this arrangement, the magnetic field strength of the magnetic circuit system 1 can be effectively increased. It can be understood that limit magnetic circuit portion 13 is including stacking first limit magnet 134, limit china 135 and the second limit magnet 136 that sets up in proper order, can promote magnetic circuit 1's magnetic field intensity from this greatly, under the prerequisite of the same magnetic field intensity of magnetic circuit 1, above-mentioned structure setting can reduce magnetic circuit 1's volume to can increase sound generating mechanism 100's back cavity volume, and then can promote sound generating mechanism 100's vocal effect.

Optionally, the first side magnet 134 and the second side magnet 136 are both magnetized in a vertical direction and in opposite directions. With this arrangement, the magnetic fluxes generated by the first side magnet 134 and the second side magnet 136 of the second long side portion 131 pass through the side washer 135 located between the first side magnet 134 and the second side magnet 136, and the magnetic fluxes generated by the first side magnet 134 and the second side magnet 136 of the second short side portion 132 pass through the side washer 135 located between the first side magnet 134 and the second side magnet 136 and the central magnetic circuit portion 12 to form a region with a large magnetic flux density, so that the first side magnet 134 and the second side magnet 136 cover the voice coil 22 as much as possible, the BL value is increased, the voice coil 22 generates a high driving force in the region, and the vibration system 2 is driven to move.

In this embodiment, the sound generating device 100 further includes a cover plate 4, where the cover plate 4 includes a metal cover plate 41, and the metal cover plate 41 covers a side of the first edge magnet 134 away from the edge washer 135. It can be understood that the cover plate 4 is provided, so that the magnetic circuit system 1 and the vibration system 2 are fixedly installed by the cover plate 4.

It can be understood, apron 4 includes metal covering 41, utilize metal covering 41 lid to locate first edge magnet 134 and keep away from one side of limit china 135, utilize metal covering 41 to realize that magnetic circuit 1's installation is fixed on the one hand, on the other hand, utilize metal covering 41 to realize sound generating mechanism 100's quick heat dissipation, improve the radiating effect, moreover, metal covering 41 lid fits first edge magnet 134 and keeps away from one side of limit china 135, can play the effect that china gathers magnetism, promote the magnetic field intensity in magnetic field. In the present embodiment, the cover plate 4 includes a metal cover plate 41 and a plastic part 42 that are integrally injection-molded, and the metal cover plate 41 covers the magnetic circuit system 1.

In an embodiment, the central magnetic circuit portion 12 includes a central washer 126 and a second central magnet 127 sequentially stacked, the second central magnet 127 is fixed to the yoke 14, and the metal cover plate 41 covers both the first side magnet 134 and the central washer 126 at a side away from the yoke 14, so that the metal cover plate 41 performs a washer magnetism-gathering function.

As shown in fig. 3 and 4, the central magnetic circuit portion 12 may be integrally disposed or separately disposed, and when the central magnetic circuit portion 12 is disposed as an integral structure, the central magnetic circuit portion 12 includes a central washer 126 and a second central magnet 127 which are sequentially stacked; when the central magnetic circuit portion 12 is provided as a separate body, that is, the central magnetic circuit portion 12 includes a first long side portion 123 and a first short side portion 124 which are sequentially arranged, and at this time, the first long side portion 123 and the first short side portion 124 both include a central washer 126 and a second central magnet 127 which are sequentially stacked, which is not limited herein.

It is understood that the second central magnet 127 of the central magnetic circuit portion 12 may be a permanent magnet, and the central washer 126 of the central magnetic circuit portion 12 may be a magnetic conductive plate. The shape profile of the central washer 126 is adapted to the shape profile of the second central magnet 127. With this arrangement, the magnetic field strength of the magnetic circuit system 1 can be effectively increased.

In this embodiment, the cover plate 4 is used to cover the first edge magnet 134 and the center washer 126 at the same time, which are away from the yoke 14, that is, the metal cover plate 41 and the plastic part 42 of the cover plate 4 are used to cover the first edge magnet 134 at the same time, which is away from the edge washer 135, and the center washer 126 at the same time, which are away from the second center magnet 127, on the one hand, the metal cover plate 41 is used to fix the magnetic circuit system 1, and the metal cover plate 41 can also play a role in washer magnetism collection, on the other hand, the metal cover plate 41 is used to realize the quick heat dissipation of the sound generating device 100, so that the heat dissipation effect is improved.

In an embodiment, the central magnetic circuit portion 12 includes a first central magnet, a central washer 126 and a second central magnet 127, which are stacked in sequence, the first central magnet and the second central magnet 127 are magnetized in opposite directions along a vertical direction, and the second central magnet 127 is fixed to the magnetic yoke 14.

In this embodiment, the central magnetic circuit portion 12 may be integrally disposed or separately disposed, and when the central magnetic circuit portion 12 is disposed as an integral structure, the central magnetic circuit portion 12 includes a first central magnet, a central washer 126 and a second central magnet 127 which are sequentially stacked; when the central magnetic circuit portion 12 is separately disposed, that is, the central magnetic circuit portion 12 includes a first long side portion 123 and a first short side portion 124 sequentially arranged, and at this time, the first long side portion 123 and the first short side portion 124 both include a first central magnet, a central washer 126 and a second central magnet 127 which are sequentially stacked, which is not limited herein.

It is understood that the first and second central magnets 127 of the central magnetic circuit portion 12 may be permanent magnets and the central washer 126 of the central magnetic circuit portion 12 may be a magnetic conductive plate. The shape profile of the central washer 126 is adapted to the shape profile of the first and second central magnets 127. With this arrangement, the magnetic field strength of the magnetic circuit system 1 can be effectively increased. It can be understood that, because central magnetic circuit portion 12 is including stacking the first central magnet and the second central magnet 127 that set up, can increase magnetic circuit 1's magnetic field intensity from this, under the prerequisite of the same magnetic field intensity of magnetic circuit 1, the volume that magnetic circuit 1 can be reduced in above-mentioned structural setting to can increase sound generating mechanism 100's back cavity volume, and then can promote sound generating mechanism 100's sound production effect.

Optionally, the first and second central magnets 127 are both magnetized in a vertical direction and in opposite directions. With this arrangement, the magnetic fluxes generated by the first center magnet and the second center magnet 127 of the center magnetic circuit portion 12 and the magnetic fluxes generated by the first side magnet 134 and the second side magnet 136 of the side magnetic circuit portion 13 form a region with a relatively large magnetic flux density through the center washer 126 located between the first center magnet and the second center magnet 127 and the side washers 135 located between the first side magnet 134 and the second side magnet 136, so that the first side magnet 134 and the second side magnet 136 and the first center magnet and the second center magnet 127 are covered along the voice coil 22 as much as possible, the BL value is increased, and the voice coil 22 generates a high driving force in the region to drive the vibration system 2 to move.

In the present embodiment, the metal cover plate 41 covers both the first side magnet 134 and the first center magnet on the side away from the magnetic yoke 14. It can be understood, through utilizing apron 4 to cover the one side of keeping away from yoke 14 of locating first edge magnet 134 and first central magnet simultaneously, also utilize metal covering 41 and the plastic part 42 of apron 4 to cover simultaneously and locate one side that first edge magnet 134 kept away from limit china 135 and one side that center china 126 was kept away from to first edge magnet 134, it is fixed to utilize metal covering 41 to realize the installation of magnetic circuit 1 on the one hand, and metal covering 41 can also play the effect that china gathers magnetism, on the other hand, utilize metal covering 41 to realize sound generating mechanism 100's quick heat dissipation, and the radiating effect is improved.

In an embodiment, the side magnetic circuit portion 13 includes a first side washer, a first side magnet 134, a second side washer and a second side magnet 136, which are sequentially stacked, wherein the first side magnet 134 and the second side magnet 136 are magnetized in a vertical direction and opposite to each other, and the second side magnet 136 is fixed to the magnetic yoke 14.

It will be appreciated that the metal cover plate 41 covers the side of the first rim washer remote from the first rim magnet 134. In this embodiment, the first edge washer and the second edge washer of the edge magnetic circuit portion 13 may be magnetic conductive plates, the first edge magnet 134 and the second edge magnet 136 may be permanent magnets, the first edge magnet 134 and the second edge magnet 136 generate magnetic fluxes, and the first edge washer and the second edge washer homogenize the magnetic fluxes generated by the first edge magnet 134 and the second edge magnet 136, so as to further improve the magnetic field strength of the magnetic circuit system 1.

In an embodiment, the central magnetic circuit portion 12 includes a first central washer, a first central magnet, a second central washer, and a second central magnet 127, which are sequentially stacked, wherein the first central magnet and the second central magnet 127 are magnetized in opposite directions, the second central magnet 127 is fixed to the magnetic yoke 14, and the outer periphery of the diaphragm assembly 21 is fixed to the first central washer.

It will be appreciated that the plastic part 42 of the cover plate 4 covers the side of the first central washer remote from the first central magnet. In this embodiment, the first central washer and the second central washer of the central magnetic circuit portion 12 may be selected as magnetic conductive plates, the first central magnet and the second central magnet 127 may be selected as permanent magnets, magnetic fluxes are generated by the first central magnet and the second central magnet 127, the magnetic fluxes generated by the first central magnet and the second central magnet 127 are uniformized by the first central washer and the second central washer, and the magnetic field strength of the magnetic circuit system 1 is further improved.

In an embodiment of the present invention, the magnetic conductive yoke 14 includes a main body portion and a bent portion (not shown), the side magnetic path portion 13 is disposed on the main body portion, the bent portion is disposed on a side of the main body portion close to the accommodating space 121 and extends in a direction close to the diaphragm assembly 21 with respect to the main body portion, and the bent portion is spaced apart from the side magnetic path portion 13 to define the magnetic gap 11. The cover plate 4 includes a metal cover plate 41 and a plastic part 42 integrally injection-molded with the metal cover plate 41, the metal cover plate 41 covers the side magnetic circuit portion 13, and the plastic part 42 is located above the bending portion and connected to the edge portion of the diaphragm 211. Thus, the above arrangement can simplify the structural design of the magnetic circuit system 1.

In an embodiment of the present invention, as shown in fig. 3 to 5, in order to avoid the center washer 126 of the central magnetic circuit portion 12 from affecting the vibration of the diaphragm 211, one end of the center washer 126 near the diaphragm 211 is provided with a chamfer. It is understood that the diaphragm assembly 21 includes a diaphragm 211 and a dome 213, the dome 213 is connected to the diaphragm 211 and is located at the center of the diaphragm 211, one end of the bobbin 23 is connected to the dome 213, and the other end of the bobbin 23 extends into the magnetic gap 11 through the first avoiding opening 122 and is connected to the voice coil 22.

In an embodiment, the bobbin 23 includes a supporting portion 231 and an extending portion 232, the supporting portion 231 is disposed in a ring shape, one end of the supporting portion 231 is connected to the diaphragm assembly 21, the extending portion 232 is disposed at the other end of the supporting portion 231, and the extending portion 232 extends into the magnetic gap 11 and is connected to the voice coil 22.

In this embodiment, as shown in fig. 3, fig. 5 to fig. 7, and fig. 10, the framework 23 is provided with the supporting portion 231 and the extending portion 232, so that the supporting portion 231 is provided in a ring shape, and the supporting portion 231 is connected to the dome 213 of the diaphragm assembly 21, thereby achieving vibration transmission on one hand and saving the cost of the framework 23 on the other hand. It is understood that the extension 232 is disposed at the other end of the supporting portion 231, so that the extension 232 can extend into the magnetic gap 11 through the first avoiding opening 122 and is connected to the voice coil 22.

It can be understood that the annular support 231 of the framework 23 is connected with the dome 213, which is beneficial to improving torsional rigidity of the framework 23 and reducing high-frequency resonance. Optionally, the supporting portion 231 is a rectangular ring, the four corners of the supporting portion 231 are symmetrically provided with extending portions 232, and the bending portions of the extending portions 232 are connected to the fixed voice coil 22.

In one embodiment, the supporting portion 231 and the extending portion 232 are formed as an integral molding. It is understood that such an arrangement is advantageous to improve the connection strength of the supporting portion 231 and the extending portion 232, so that the structural strength of the framework 23 can be improved. Of course, the support portion 231 and the extension portion 232 are welded or adhesively connected, and not limited herein. Optionally, the extending portion 232 includes a plurality of extending portions 232, and the plurality of extending portions 232 are distributed at intervals along the circumferential direction of the supporting portion 231, which is not limited herein.

In one embodiment, there are two extending portions 232, and the two extending portions 232 are spaced apart along the circumferential direction of the supporting portion 231; the magnetic circuit system 1 is square, and the two extending portions 232 respectively extend into the magnetic gap 11 through a pair of diagonal positions of the magnetic circuit system 1 and are connected to the voice coil 22.

It can be understood that the central magnetic circuit portion 12 of the magnetic circuit system 1 is provided with the first avoiding opening 122 corresponding to the two extending portions 232, respectively, so that the two extending portions 232 respectively extend into the magnetic gap 11 through a pair of opposite positions of the magnetic circuit system 1 and are connected to the voice coil 22. Optionally, the two first avoidance holes 122 are located at a pair of diagonal positions of the central magnetic circuit portion 12, so that not only can the balanced placement of the bobbin 23 be achieved, but also the voice coil 22 can drive the diaphragm 211 to vibrate smoothly through the bobbin 23.

In one embodiment, the number of the extending portions 232 is four, and the four extending portions 232 are distributed at intervals along the circumferential direction of the supporting portion 231; the magnetic circuit system 1 is square, and the four extending portions 232 respectively extend into the magnetic gap 11 through four diagonal positions of the magnetic circuit system 1 and are connected to the voice coil 22.

It can be understood that the four diagonal positions of the central magnetic circuit portion 12 of the magnetic circuit system 1 are provided with the first avoidance openings 122, and the four extension portions 232 respectively extend into the magnetic gap 11 through the four diagonal positions of the magnetic circuit system 1 and are connected to the voice coil 22. By such an arrangement, the stability of the connection of the voice coil 22 and the diaphragm 211 through the bobbin 23 can be effectively improved.

In one embodiment, the sound generating device 100 further includes a spider 3, an inner end of the spider 3 is connected to the bobbin 23, the spider 3 is provided with an inner pad 31 and an outer pad (not shown), a lead portion of the voice coil 22 is soldered to the inner pad 31, and the outer pad is electrically connected to an external circuit.

In this embodiment, as shown in fig. 3 and fig. 5 to fig. 7, by providing the centering support 3 and providing the inner pad 31 and the outer pad on the centering support 3, the inner end of the centering support 3 is connected to the extension 232 of the bobbin 23, the lead portion of the voice coil 22 is welded to the inner pad 31, and the outer pad is electrically connected to the external circuit, so that the centering support 3 can be used to electrically connect the voice coil 22 to the external circuit, thereby effectively avoiding the problem of poor circuit conduction caused by lead fracture of the voice coil 22 during vibration, and meanwhile, the centering support 3 also has the effect of stabilizing the vibration of the bobbin 23, avoiding the vibration of the voice coil 22 during vibration, thereby further improving the acoustic performance of the sound generating apparatus 100.

It can be understood that, through setting up spider 3 to utilize spider 3 effectively to avoid the swing that voice coil 22 appears at the vibration in-process to prescribe a limit to, utilize spider 3 to realize that voice coil 22 and external circuit are connected and switch on simultaneously, and play the effect of stabilizing skeleton 23 vibration. It will be appreciated that the centring disk 3 may be of one integral construction or may comprise a plurality of centring disks.

In one embodiment, the outer end of the centering disk 3 is fixed to the magnetic circuit system 1. It can be understood that the centering branch piece 3 includes an inner fixing portion, an outer fixing portion and an elastic portion respectively connected to the inner fixing portion and the outer fixing portion, the inner fixing portion is provided with an inner pad 31, so that the centering branch piece 3 can be fixed to the magnetic yoke 14 of the magnetic circuit system 1 through the outer fixing portion, thereby improving the installation stability of the centering branch piece 3. Meanwhile, the elastic part can generate sound and elastically deform when the voice coil 22 vibrates, so that the voice coil 22 can be conducted with an external circuit through the centering support piece 3, and the problems of unsmooth conduction and the like caused by the fact that the lead of the voice coil is broken in the vibration process of the voice coil 22 can be solved.

In this embodiment, the inner fixing portion at the inner end of the centering branch piece 3 is further connected to the bobbin 23, so that the centering branch piece 3 can be used to further stabilize the bobbin 23, thereby further avoiding the swing phenomenon of the voice coil 22 during the vibration process, and improving the acoustic performance of the sound generating apparatus 100.

In one embodiment, the sound generating apparatus 100 further includes a cover plate 4, the magnetic circuit system 1 and the vibration system 2 are both disposed in the cover plate 4, and the outer end of the centering branch piece 3 is fixed to the cover plate 4. It can be understood that, by providing the cover plate 4, the magnetic circuit system 1 and the vibration system 2 can be conveniently installed and fixed by using the cover plate 4, so as to protect the magnetic circuit system 1 and the vibration system 2.

In the present embodiment, the damper 3 may be fixed to the cover plate 4 through the outer fixing portion, thereby improving the mounting stability of the damper 3. Meanwhile, the elastic part of the centering support 3 is elastically deformed in the vibration process of the voice coil 22, so that the voice coil 22 can be conducted with an external circuit through the centering support 3, and the problems of unsmooth conduction and the like caused by the breakage of a lead of the voice coil in the vibration process of the voice coil 22 can be solved. It can be understood that the inner fixing portion at the inner end of the centering branch piece 3 is further connected to the framework 23, so that the centering branch piece 3 can be used to further stabilize the framework 23, thereby further avoiding the swing phenomenon of the voice coil 22 during the vibration process and improving the acoustic performance of the sound generating device 100.

In one embodiment, the magnetic circuit system 1 is square, the number of the centering branch pieces 3 is two, avoidance openings 15 are arranged at least one pair of diagonal positions of the magnetic circuit system 1, one centering branch piece 3 is arranged in each avoidance opening 15, and two ends of each centering branch piece 3 are respectively connected with the framework 23 and the cover plate 4.

It can be understood that, as shown in fig. 3 and 5, by providing the avoiding opening 15 on the magnetic circuit system 1, the avoiding opening 15 is conveniently utilized to provide an installation space for the damper 3, so that the damper 3 can be installed, and the increase of the thickness of the sound generating device 100 can be avoided.

In this embodiment, the two centering branch pieces 3 are selected, at least one pair of diagonal positions of the magnetic circuit system 1 are provided with avoiding openings 15, so that one centering branch piece 3 is arranged in each avoiding opening 15, two ends of each centering branch piece 3 are respectively connected with the extending portion 232 of the framework 23 and the cover plate 4, that is, the outer fixing portion of each centering branch piece 3 is connected with the cover plate 4, and the elastic portion of each centering branch piece 3 is connected with the extending portion 232 of the framework 23. It can be understood that the escape opening 15 of the magnetic circuit system 1 communicates with the magnetic gap 11, so that the elastic part of the centering branch piece 3 can be conveniently connected with the framework 23 extending into the magnetic gap 11.

Of course, in other embodiments, the avoiding opening 15 may be only used for installing the limiting centralizer 3, the avoiding opening 15 is not connected to the magnetic gap 11 or the accommodating space 121, and at this time, the elastic portion of the centralizer 3 may be bent to achieve connection with the framework 23, which is not limited herein.

In an embodiment, the magnetic circuit system 1 is square, the number of the centering branch pieces 3 is four, the avoiding openings 15 are formed in four diagonal positions of the magnetic circuit system 1, one centering branch piece 3 is arranged in each avoiding opening 15, and two ends of each centering branch piece 3 are connected with the framework 23 and the cover plate 4 respectively.

It can be understood that, as shown in fig. 3 and fig. 5 to 7, the number of the centering branch pieces 3 can be four, and four diagonal positions of the magnetic circuit system 1 are provided with the avoiding opening 15, so that one centering branch piece 3 is arranged in each avoiding opening 15, and two ends of each centering branch piece 3 are respectively connected with the extending portion 232 of the bobbin 23 and the cover plate 4, thereby further improving the connection stability and the vibration balance of the bobbin 23, and effectively avoiding the phenomena of the voice coil 22 such as swinging in the vibration process.

Optionally, the periphery of the bobbin 23 is provided with an extension 232, the extension 232 extends into the magnetic gap 11 and is connected to the voice coil 22, the number of the centering branch pieces 3 is the same as that of the extension 232, and the plurality of centering branch pieces 3 and the plurality of extension 232 are arranged in one-to-one correspondence.

In an embodiment of the present invention, four centering fins 3 may be selected, the framework 23 includes a supporting portion 231 and four extending portions 232, the supporting portion 231 is annularly disposed, the four extending portions 232 are distributed at intervals along a circumferential direction of the supporting portion 231, the four extending portions 232 respectively penetrate through the avoidance ports 15 at four diagonal positions of the magnetic circuit system 1, the four centering fins 3 are correspondingly disposed at the four avoidance ports 15, an inner end of each centering fin 3 is connected to the corresponding extending portion 232, and an outer end of each centering fin 3 is fixed to a housing of the sound generating device 100.

In an embodiment, as shown in fig. 3, 5 to 7, and 10, one end of the extension portion 232 connected to the voice coil 22 includes a first fixing portion 2321 and a second fixing portion 2322, the first fixing portion 2321 is formed in a circular arc shape and connected to the voice coil 22, the second fixing portion 2322 is formed in a long strip shape, and the inner pad 31 of the spider 3 is fixed to the second fixing portion 2322.

It can be understood that the extension portion 232 of the framework 23 is made of a metal material, or a circuit for connecting and conducting the inner pad 31 of the centering leg 3 and the voice coil 22 is disposed in the second fixing portion 2322 of the extension portion 232, which is not limited herein.

In one embodiment, the diaphragm assembly 21 includes a diaphragm 211 and a dome 213, the dome 213 is connected to the diaphragm 211 and is located at the center of the diaphragm 211, one end of the bobbin 23 is connected to the dome 213, and the other end of the bobbin 23 extends into the magnetic gap 11 and is connected to the voice coil 22.

In this embodiment, as shown in fig. 1 to 4 and fig. 5 to 9, the dome 213 is connected to the diaphragm 211 and is located at the center of the diaphragm 211, and the edge of the diaphragm 211 is connected to the cover plate 4. By attaching the dome 213 to the center position of the diaphragm 211, the edge portion of the diaphragm 211 is connected to the cover plate 4, so that the strength of the center position of the diaphragm 211 is increased by the dome 213.

As shown in fig. 1 to 4, 6, 8, and 9, the cover plate 4 further includes a plastic part 42 integrally injection-molded with the metal cover plate 41, and the plastic part 42 of the cover plate 4 is connected to the edge portion of the diaphragm 211. It can be understood that the edge portion of the diaphragm 211 is integrally injection-molded with the plastic part 42, thereby improving the connection strength and sealing performance of the diaphragm 211 and the plastic part 42 of the cover plate 4. Of course, in other embodiments, the edge portion of the diaphragm 211 and the plastic part 42 are integrally formed by hot pressing; alternatively, the edge portion of the diaphragm 211 is adhesively connected to the plastic member 42, which is not limited herein.

It is understood that the diaphragm 211 has an upwardly convex or downwardly concave corrugated portion, the dome 213 is connected to the inner side of the corrugated portion of the diaphragm 211, and the outer side of the corrugated portion of the diaphragm 211 is connected to the plastic member 42 of the cover plate 4, which is not limited herein. In this embodiment, the bending portion of the vibrating diaphragm 211 can be selected as the bending portion of the downward depression, and the bending portion is a U-shaped structure with elastic recovery, so as to be disposed, so that the vibrating diaphragm 211 occupies a small vibration radiation surface on the basis of providing a large compliance, and the vibration sound-emitting area is effectively increased.

In this embodiment, the diaphragm 211 and the dome 213 of the diaphragm assembly 21 may be integrally formed by an integral molding technique. It can be understood that the planar portion of the diaphragm 211 is tightly pressed to the dome 213, and the outer edge of the diaphragm 211 is coupled to the plastic part 42 of the cover plate 4, the integrally formed diaphragm assembly 21 is connected by the cover plate 4, and the three integrally formed techniques ensure reliable and durable contact.

In one embodiment, the distance between the top surface of the dome 213 and the bottom wall of the accommodating space 121 is smaller than the distance between the top surface of the magnetic circuit system 1 and the bottom wall of the accommodating space 121 in the vertical direction. It is understood that, as shown in fig. 3, the thickness of the magnetic circuit system 1 is set to be parallel to the vibration height of the diaphragm assembly 21, so that the thickness of the sound generating apparatus 100 can be reduced.

In an embodiment, as shown in fig. 1 to 4 and 6 to 9, the sound generating device 100 further includes a cover plate 4, the cover plate 4 covers the magnetic circuit system 1, at least a portion of the cover plate 4 is formed as a plastic part 42, and an edge portion of the diaphragm 211 is connected to the plastic part 42.

In the present embodiment, the cover plate 4 is disposed on the magnetic circuit system 1, and at least a portion of the cover plate 4 is formed as a plastic part 42, so that the plastic part 42 of the cover plate 4 is connected to the edge portion of the diaphragm 211. It can be understood that the edge portion of the diaphragm 211 is integrally injection-molded with the plastic part 42, thereby improving the connection strength and sealing performance of the diaphragm 211 and the plastic part 42 of the cover plate 4. Of course, in other embodiments, the edge portion of the diaphragm 211 and the plastic part 42 are integrally formed by hot pressing; alternatively, the edge portion of the diaphragm 211 is adhesively connected to the plastic member 42, which is not limited herein. Alternatively, the cover plate 4 may be a plastic part 42, and the cover plate 4 may also be a plastic part 42, and a metal part, which are not limited herein.

In one embodiment, the edge portion of the diaphragm 211 has a plurality of fixing protrusions 212 distributed at intervals, the plastic part 42 has a plurality of fixing grooves 43, and each fixing protrusion 212 is fixed in a corresponding fixing groove 43.

As shown in fig. 4, 8 and 9, the fixing protrusion 212 is disposed on the edge portion of the diaphragm 211, and the fixing groove 43 is disposed on the plastic part 42, so that the fixing protrusion 212 is fixed in the fixing groove 43, which can improve the connection stability between the diaphragm 211 and the plastic part 42, and improve the positioning, mounting and sealing performance between the diaphragm 211 and the plastic part 42.

It can be understood that, the edge portion of the diaphragm 211 is provided with a plurality of fixing protrusions 212, the plurality of fixing protrusions 212 are distributed at intervals, and when the diaphragm 211 and the plastic part 42 are integrally injection-molded, the plastic part 42 is formed with a fixing groove 43 corresponding to the position of the fixing protrusion 212, so that the connection strength and the sealing performance of the diaphragm 211 and the plastic part 42 of the cover plate 4 can be improved.

In an embodiment, the cover plate 4 includes a metal cover plate 41 and a plastic part 42, which are integrally injection-molded, and the metal cover plate 41 covers the magnetic circuit system 1. It can be understood that the cover plate 4 is provided, so that the magnetic circuit system 1 and the vibration system 2 are fixedly installed by the cover plate 4. It can be understood that apron 4 includes metal covering 41, utilizes metal covering 41 lid to locate the one side that first edge magnet 134 kept away from limit china department 135, utilizes metal covering 41 to realize that magnetic circuit 1's installation is fixed on the one hand, and metal covering 41 can also play china department and gather the effect of magnetism, and on the other hand utilizes metal covering 41 to realize sound generating mechanism 100's quick heat dissipation, improves the radiating effect.

In one embodiment, the dome 213 and the armature 23 are formed as an integrally formed piece of metal. It can be understood that, by such an arrangement, the connection strength between the dome 213 and the bobbin 23 can be improved, and the vibration effect of the voice coil 22 transmitting the vibration to the diaphragm 211 through the bobbin 23 can be improved.

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. An electronic device, characterized in that the electronic device comprises:

2. The electronic device of claim 1, wherein a portion of the inner peripheral wall of the mounting chamber directly opposite the diaphragm assembly is provided with a sound guide wall spaced from the diaphragm assembly to define the side-out acoustic channel.

3. The electronic device according to claim 2, wherein the sound generating device is disposed obliquely with respect to the sound guide wall, and a distance between the sound generating device and the sound guide wall gradually increases in a flowing direction of the air flow.

4. The electronic device according to claim 2, wherein the sound guide wall is provided with a sound guide surface that extends obliquely toward a direction away from the sound emitting device in the circulating direction of the air flow.

5. The electronic device according to claim 2, wherein a side of the sound guide wall adjacent to the sound outlet is provided with a recess portion recessed toward a direction away from the sound emitting device.

6. The electronic device according to any of claims 1 to 5, wherein the magnetic circuit system comprises:

a side magnetic path portion provided at an outer periphery of the central magnetic path portion and spaced apart from the central magnetic path portion to define the magnetic gap; and

7. The electronic device according to claim 6, wherein the central magnetic circuit portion includes a first long side portion and a first short side portion arranged in sequence, the first long side portion and the first short side portion are separately disposed and enclose to form the accommodating space, and the first long side portion is disposed at an interval from the adjacent first short side portion to define the first avoidance opening;

and/or the side magnetic circuit part comprises a second long side part and a second short side part which are sequentially arranged, the second long side part and the second short side part are arranged in a split manner, and the second long side part and the adjacent second short side part are arranged at intervals to limit a second avoidance port communicated with the first avoidance port.

8. The electronic device of claim 6, wherein the side magnetic circuit portion comprises a first side magnet, a side washer and a second side magnet, which are stacked in sequence, wherein the first side magnet and the second side magnet are magnetized in vertical directions and opposite to each other, and the second side magnet is fixed to the magnetic yoke;

9. The electronic device according to any one of claims 1 to 5, wherein the bobbin comprises a supporting portion and an extending portion, the supporting portion is disposed in a ring shape, one end of the supporting portion is connected to the diaphragm assembly, the extending portion is disposed at the other end of the supporting portion, and the extending portion extends into the magnetic gap and is connected to the voice coil.

10. The electronic device of claim 9, wherein the support portion and the extension portion are formed as an integral molding;

or, the support part and the extension part are welded or bonded.

11. The electronic device according to any one of claims 1 to 5, wherein the sound generating device further comprises a centering leg, an inner end of the centering leg is connected to the bobbin, the centering leg is provided with an inner pad, and a lead portion of the voice coil is welded to the inner pad.

12. The electronic device of claim 11, wherein the outer end of the centering branch piece is fixed to the magnetic circuit system;

13. The electronic device of claim 12, wherein the magnetic circuit system is arranged in a square;

14. The electronic device of claim 11, wherein the bobbin has an extension portion at a periphery thereof, the extension portion extends into the magnetic gap and is connected to the voice coil, the number of the spider pieces is the same as the number of the extension portions, and a plurality of the spider pieces are disposed in one-to-one correspondence with the plurality of the extension portions.

15. The electronic device according to claim 14, wherein an end of the extension portion connected to the voice coil includes a first fixing portion and a second fixing portion, the first fixing portion is formed in a circular arc shape and connected to the voice coil, the second fixing portion is formed in a long strip shape, and the inner pad of the spider is fixed to the second fixing portion.

16. The electronic device of any one of claims 1 to 5, wherein the diaphragm assembly includes a diaphragm and a dome, the dome is connected to the diaphragm and located at a center of the diaphragm, one end of the bobbin is connected to the dome, and the other end of the bobbin extends into the magnetic gap and is connected to the voice coil.

17. The electronic apparatus according to claim 16, wherein a distance between a top surface of the dome and the bottom wall of the accommodation space in the vertical direction is smaller than a distance between a top surface of the magnetic circuit system and the bottom wall of the accommodation space.

18. The electronic device of claim 16, wherein the sound generating device further comprises a cover plate covering the magnetic circuit system, at least a portion of the cover plate is formed as a plastic member, and the edge portion of the diaphragm is connected to the plastic member.

19. The electronic device of claim 18, wherein the edge portion of the diaphragm has a plurality of fixing protrusions spaced apart from each other, the plastic member has a plurality of fixing grooves, and each fixing protrusion is fixed in a corresponding fixing groove;

20. The electronic device of claim 18, wherein the edge portion of the diaphragm is integrally injection-molded with the plastic part;