CN111698617A - Sound production device and electronic equipment - Google Patents

Sound production device and electronic equipment Download PDF

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Publication number
CN111698617A
CN111698617A CN201910194928.0A CN201910194928A CN111698617A CN 111698617 A CN111698617 A CN 111698617A CN 201910194928 A CN201910194928 A CN 201910194928A CN 111698617 A CN111698617 A CN 111698617A
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CN
China
Prior art keywords
vibration
magnetic
voice coil
magnetic circuit
magnet
Prior art date
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Pending
Application number
CN201910194928.0A
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Chinese (zh)
Inventor
王兴龙
李�杰
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Goertek Inc
Original Assignee
Goertek Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Goertek Inc filed Critical Goertek Inc
Priority to CN201910194928.0A priority Critical patent/CN111698617A/en
Publication of CN111698617A publication Critical patent/CN111698617A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06Loudspeakers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/02Constructional features of telephone sets
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02Details
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2400/00Loudspeakers
    • H04R2400/11Aspects regarding the frame of loudspeaker transducers

Abstract

The invention relates to a sound generating device and an electronic device. The sound generating device comprises a magnetic circuit system, a first vibration system and a second vibration system, wherein the first vibration system and the second vibration system are respectively positioned on two sides of the magnetic circuit system; the magnetic circuit system comprises a central magnet positioned in the middle, a first magnetic gap for a first voice coil of the first vibration system to extend into is formed on one surface of the magnetic circuit system, a second magnetic gap for a second voice coil of the second vibration system to extend into is formed on the other surface of the magnetic circuit system, the first magnetic gap and the second magnetic gap are positioned on the outer side of the central magnet, and the first magnetic gap is far away from the central magnet; at least the first vibration system further comprises a first vibrating diaphragm and a connecting sheet with a folded ring, the first vibrating diaphragm is located at one end, away from the magnetic circuit, of the first voice coil, and the connecting sheet is connected to the bottom end, facing the magnetic circuit, of the first voice coil to limit vertical vibration of the first voice coil in the direction perpendicular to the first magnetic gap.

Description

Sound production device and electronic equipment
Technical Field
The invention belongs to the technical field of sound-electricity transduction, and particularly relates to a sound generating device and electronic equipment.
Background
A micro-speaker is a transducer device that converts an electrical signal into an acoustic signal, which is vibrated by a diaphragm and resonates with the surrounding air to emit sound. The traditional micro loudspeaker is generally composed of a vibration system, a magnetic circuit system and a supporting system; the vibration system usually contains vibrating diaphragm, dome, voice coil loudspeaker voice coil etc. and magnetic circuit usually contains china department, basin frame and a plurality of magnet, and braced system usually contains shell, shell fragment and other inserts etc..
In the prior art, in order to meet the requirement of improving the acoustic performance of a market end, the performance is generally improved by increasing the vibration area and the working amplitude of a product; however, the increase of the vibration area can lead to the increase of the product size, influence the application of the whole machine end, and the further increase of the working amplitude can bring about various quality problems.
Disclosure of Invention
One object of the present invention is to provide a new solution for a sound generating device.
According to one aspect of the present invention, there is provided a sound generating device, comprising a magnetic circuit system and a first vibration system and a second vibration system respectively located on both sides of the magnetic circuit system;
the magnetic circuit system comprises a central magnet positioned in the middle, a first magnetic gap for a first voice coil of the first vibration system to extend into is formed on one surface of the magnetic circuit system, a second magnetic gap for a second voice coil of the second vibration system to extend into is formed on the other surface of the magnetic circuit system, and the first magnetic gap and the second magnetic gap are positioned on the outer side of the central magnet;
at least the first vibration system further comprises a first vibrating diaphragm and a connecting sheet with a folded ring, the first vibrating diaphragm is located at one end, away from the magnetic circuit, of the first voice coil, and the connecting sheet is connected to the bottom end, facing the magnetic circuit, of the first voice coil to limit vertical vibration of the first voice coil in the direction perpendicular to the first magnetic gap.
Optionally, the direction of the protrusion of the corrugated rim on the connecting sheet is the same as or opposite to the direction of the protrusion of the corrugated rim on the first diaphragm.
Optionally, the edge of the connecting plate protrudes upward or downward along the vibration direction of the first voice coil.
Optionally, the position of the corrugated rim on the connecting sheet is opposite to the position of the corrugated rim on the diaphragm.
Optionally, the first vibration system further includes a first centering support, the top end of the first voice coil is connected to the first centering support, and the first vibrating diaphragm is connected to one side of the first centering support deviating from the first voice coil.
Optionally, the second vibration system further includes a second diaphragm and a second centering support, one end of the second voice coil, which is away from the magnetic circuit system, is connected to the second centering support, and the second diaphragm is connected to one side of the second centering support, which is away from the second voice coil.
Optionally, the first magnetic gaps and the second magnetic gaps are staggered, and the first magnetic gaps are far away from the central magnet.
Optionally, the magnetic circuit system further includes a magnetic yoke, a side magnet, a center washer and a side washer, the magnetic yoke includes a frame body portion having a hollow region and a middle portion opposite to the hollow region and higher than the frame body portion, a gap is provided between the center portion and the frame body portion, and at least two ends of the center portion that are away from each other are fixedly connected to the frame body portion through a connecting wall;
a frame body part of the magnetic guide yoke is upwards provided with a side magnet and a side washer in sequence, and a first magnetic gap is formed between the side washer and the central part of the magnetic guide yoke; the center part of the magnetic guide yoke is downwards provided with a center magnet and a center washer in sequence, the center washer and the frame body part of the magnetic guide yoke form a second magnetic gap for a second voice coil of the second vibration system to extend into, and the first magnetic gap and the second magnetic gap are positioned between the center magnet and the side magnet.
Optionally, the magnetic circuit system includes a plurality of edge magnets, the edge magnets are symmetrically arranged on the outer side of the central magnet, and the connecting piece avoids the edge magnets and is connected with the first voice coil.
Optionally, magnetic circuit is rectangle or oval, center magnet is corresponding rectangle or oval, the connection wall is located magnetic circuit's minor axis is served, the connection wall is connected the interior border of frame body portion, first voice coil loudspeaker voice coil is located the outside of connection wall, limit magnet sets up magnetic circuit's major axis edge, the connection piece to magnetic circuit's minor axis edge direction stretch out with the one end of first voice coil loudspeaker voice coil is connected.
Optionally, the first vibration system includes a plurality of connection pieces, and the plurality of connection pieces are symmetrically connected to the first voice coil.
Optionally, the vibration isolator further comprises a first shell assembly and a second shell assembly, the first shell assembly and the second shell assembly are respectively arranged on two sides of the magnetic circuit system, and the washer, the first diaphragm and the connecting sheet of the first vibration system are fixedly held on the first shell assembly; the frame body part of the magnetic guide yoke and the second vibration system are fixedly held on the second shell assembly, and one side of the side magnet, which is far away from the central magnet, is exposed.
According to another aspect of the present invention, the present invention further provides an electronic device, including the sound generating device as described above, disposed in the housing.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic of the form construction of some embodiments of the present invention.
Fig. 2 is a schematic structural view of a section a-a in fig. 1.
Fig. 3 is an enlarged view of a portion of the structure at C in fig. 2.
Fig. 4 is a schematic structural view of a section B-B in fig. 2.
Fig. 5 is an exploded view of the structure of some embodiments of the present invention.
FIG. 6 is a schematic view of a magnetic yoke according to some embodiments of the present invention.
Fig. 7 is a schematic view of a magnetic yoke from another perspective in accordance with some embodiments of the present invention.
Fig. 8 is a partial structural schematic of some embodiments of the invention.
Fig. 9 is a schematic structural diagram of further embodiments of the present invention.
Fig. 10 is a schematic view of the structure of the section D-D in fig. 9.
In the figure: the magnetic circuit system comprises a magnetic circuit system, a magnetic yoke 11, a central part 12, a frame part 13, a central magnet 14, a magnet 15, a central washer 16, a washer 17, a first magnetic gap 18, a second magnetic gap 19, a first vibration system 2, a first voice coil 21, a first vibrating diaphragm 22, a connecting sheet 23, a first reinforcing part 24, a first centering support 25, a second vibration system 3, a second voice coil 31, a second vibrating diaphragm 32, a second centering support 33, a second reinforcing part 34, a first shell assembly 4 and a second shell assembly 5.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be considered a part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
According to one aspect of the present invention, the present invention provides a sound generating device, in some embodiments, referring to fig. 1 to 5, comprising a magnetic circuit system 1, a first vibration system 2 and a second vibration system 3. The first vibration system 2 and the second vibration system 3 are respectively positioned on the top surface and the bottom surface of the magnetic circuit system 1, and the magnetic circuit system 1 is used for driving the first vibration system 2 and the second vibration system 3 to vibrate and produce sound.
One side of magnetic circuit 1 forms first magnetic gap 18 that first voice coil 21 that supplies first vibration system 2 stretched into, and when first voice coil 21 inserted the signal of telecommunication for magnetic circuit 1 can drive first voice coil 21 vibration and drive first vibration system 2 vibration sound production. The other side of magnetic circuit 1 forms second magnetic gap 19 that supplies second voice coil 31 of second vibration system 3 to stretch into, and when second voice coil 31 inserts the signal of telecommunication, makes magnetic circuit 1 can drive second voice coil 31 vibration and drive second vibration system 3 vibration sound production. The magnetic circuit system 1 comprises a central magnet 14 in the middle, and a first magnetic gap 18 and a second magnetic gap 19 are located outside the central magnet 14.
At least the first vibration system 2 further comprises a first diaphragm 22 and a connection piece 23. The first diaphragm 22 is located at an end of the first voice coil 21 away from the magnetic circuit system 1. The connecting piece 23 is provided with a folding ring structure, two ends of the connecting piece 23 extend outwards and horizontally, and the folding ring is positioned between the two ends. One end of the connecting sheet 23 is fixed in the sound generating device, and the other end is connected to the bottom end of the first voice coil 21 facing the magnetic circuit system 1, so that the upper end and the lower end of the first voice coil 21 are both supported, and the first voice coil 21 is limited to vertically vibrate in the direction perpendicular to the first magnetic gap 18 by the folding ring on the connecting sheet 23 and the folding ring on the first vibrating diaphragm 22, so that the vibration balance of the first vibrating system 2 is better, and the optimized acoustic performance can be achieved.
Due to the structural design, the two sets of vibration systems can be driven to vibrate and sound only by one set of magnetic circuit system at least, and higher acoustic performance can be obtained under the condition of relatively smaller size and amplitude; the small size adapts to the structures of different machine types, and the application range is wider; small amplitudes can reduce product reliability risks. In addition, the traditional loudspeaker can cause the vibration phenomenon of the whole loudspeaker when working, and the experience of the whole loudspeaker is seriously influenced; the two-way sound production device can obviously offset the vibration problem of the whole machine due to the reverse vibration of the vibration systems on the two sides. In use, the same or different electrical signals may be input to the first and second voice coils to achieve different acoustic properties. The two ends of at least one voice coil can be simultaneously supported in the double-faced loudspeaker, so that the vibration balance of at least one vibration system is better, and the influence of polarization on acoustic performance is reduced.
In some embodiments, referring to fig. 3, the direction of the protrusion of the corrugated rim on the connecting sheet 23 is the same as the direction of the protrusion of the corrugated rim on the first diaphragm 22, so that the amplitude and the force application condition during the vibration process are the same, and interference does not occur during the vibration process, which is convenient for design. In some other embodiments, referring to fig. 10, the protruding directions of the corrugated rim on the connecting sheet 23 and the corrugated rim on the first diaphragm 22 may be opposite, which is not limited in the present application.
In some embodiments, referring to fig. 3, the edge of the connection piece 23 protrudes upward along the vibration direction of the first voice coil 21. In some other embodiments, referring to fig. 10, the folded ring on the connecting plate 23 may also be protruded downward along the vibration direction of the first voice coil 21, which is not limited in the present application.
In some embodiments, referring to FIG. 3, the convolutions on the first diaphragm 22 are upwardly convex. In some other embodiments, the corrugated rim on the first diaphragm 22 may also be downwardly convex to reduce the overall size of the sound generator.
In some embodiments, referring to fig. 3, the position of the edge on the connecting plate is opposite to the position of the edge on the diaphragm, so that the vibration process of the edge on the connecting plate 23 and the edge on the first diaphragm 22 can be consistent.
In some embodiments, referring to fig. 9 and 10, the first vibration system 2 further includes a first spider 25. The outer edge of the first centring disk 25 is held in the sound-emitting device. The top of first voice coil loudspeaker voice coil 21 is connected with the interior border of first centering branch piece 25, and first vibrating diaphragm 22 is connected and is deviated from at first centering branch piece 25 one side of first voice coil loudspeaker voice coil, anti polarization performance during the vibration of first voice coil loudspeaker voice coil 21 of further improvement guarantees its acoustic performance. The book ring on the first vibrating diaphragm 22 is upwards protruding along the vibration direction of first voice coil 21, and the book ring on the connection piece 23 is downwards protruding, dodges first centering branch piece 25, for first centering branch piece 25 provides sufficient installation and vibration space, prevents to bump at the vibration in-process, guarantees the stability of the acoustic performance of this application.
In some embodiments, referring to fig. 1 to 5, the second vibration system 3 further includes a second diaphragm 32 and a second centering disk 33. One end of the second voice coil 31 departing from the magnetic circuit system 1 is connected to the second centering branch 33, and the second diaphragm 32 is connected to one side of the second centering branch 33 departing from the second voice coil 31.
In some embodiments, referring to fig. 5, the first vibration system 2 of the present application fixes the upper and lower surfaces of the first voice coil 21 through the first diaphragm 22 and the connecting piece 23, so that the first vibration system 2 has better vibration balance; the second vibration system 3 can bring better balance through the multi-leg structure design of the complete and larger second centering support piece 33 bonded with the second diaphragm 22, so that the anti-swing polarization capability of the application is better when the two vibration systems work simultaneously, and the optimized acoustic performance can be achieved when the product is applied.
In some embodiments, referring to fig. 1 to 5, the first magnetic gap 18 is far away from the central magnet 14, so that the first magnetic gap 18 and the second magnetic gap 19 are arranged in a staggered manner, and the first voice coil 21 and the second voice coil 31 are prevented from being mutually hindered in the process of simultaneous vibration. Meanwhile, due to the staggered arrangement, the vibration spaces of the first voice coil 21 and the second voice coil 31 can be avoided, and on the premise of meeting the use requirement, the thickness of the magnetic circuit system can be as thin as possible, so that the size of the sound generating device is reduced to meet the requirement of miniaturization.
In some embodiments, referring to fig. 1 to 8, the magnetic circuit system 1 further includes a yoke 11, a side magnet 15, a center washer 16, and a side washer 17. The yoke 11 includes a center portion 12 at an intermediate position and a frame portion 13 surrounding the center portion 12. The frame portion 13 has a hollow region formed by enclosure. As shown in fig. 6, the central portion 12 is opposite to the hollow area and is higher than the frame portion 13, and it can be understood by those skilled in the art that the higher is a relative concept, and also, as shown in fig. 7, the central portion 12 is lower than the frame portion 13, and then the relative change occurs in the upper and lower directions defined in the upper and lower directions in the present application.
In horizontal projection, the outline of the central portion 12 may be matched with the outline of the hollow region of the frame portion 13, or may be smaller than the outline of the hollow region of the frame portion 13 or larger than the outline of the hollow region of the frame portion 13, which is not limited in the present application.
A gap is provided between the center portion 12 and the frame portion 13. At least two ends of the central portion 12, which are away from each other, are fixedly connected to the frame portion 13 through a connecting wall. At least the two ends of the central portion 12 facing away from each other are fixedly connected to the frame portion 13 to maintain the integrity and structural stability of the magnetic yoke 11. Referring to fig. 6 and 7, both ends of the center portion 12 may be fixedly connected to the frame portion 13 through connection walls. The yoke 11 may be formed by an integral molding process, or the central portion 12 and the frame portion 13 may be fixedly connected together by a connection process such as welding or riveting, but the present application is not limited thereto, and the central portion 12 and the frame portion 13 may be stably connected.
Referring to fig. 4 and 8, the frame portion 13 of the magnetic yoke 11 is sequentially provided with the side magnet 15 and the side washer 17 upward, the side washer 17 and the central portion 12 of the magnetic yoke 11 form a first magnetic gap 18 into which the first voice coil 21 of the first vibration system 2 extends, and when the first voice coil 21 is connected to an electric signal, the magnetic circuit system 1 can drive the first voice coil 21 to vibrate to drive the first vibration system 2 to vibrate and generate sound.
Referring to fig. 4 and 8, the central portion 12 of the magnetic yoke 11 is provided with the central magnet 14 and the central washer 16 in sequence, the central washer 16 and the frame portion 13 of the magnetic yoke 11 form a second magnetic gap 19 into which the second voice coil 31 of the second vibration system 3 extends, and when the second voice coil 31 is connected to an electric signal, the magnetic circuit system 1 can drive the second voice coil 31 to vibrate to drive the second vibration system 3 to vibrate and generate sound.
The magnetic conduction yoke of this application can play the function of basin frame, and central part and frame body portion can also play the function of the center china department and the limit china department on central magnet two sides respectively, have simplified magnetic conduction structure of magnetic circuit in the two-sided speaker, and the structure of the two-sided speaker that makes is simpler, and the size can accomplish littleer relatively.
In some embodiments, referring to fig. 4 and 8, a first magnetic gap 18 and a second magnetic gap 19 are located between the center magnet 14 and the edge magnets 15 to provide sufficient space for voice coil vibration and to avoid magnetic leakage.
In some embodiments, referring to fig. 4 and 8, the first magnetic gap 18 is far from the central magnet 14, so that the central portion 12 of the magnetic yoke 11 can be matched with the hollow area of the frame portion 13 as much as possible, thereby reducing cutting and material waste during the processing of the integrated forming process and the like. When the yoke 11 is manufactured by the integral molding process, if the first magnetic gap 18 is far from the central magnet 14, the sizes of the central portion 12 and the frame portion 13 are inevitably reduced, and the sizes of the central washer 16 and the side washers 17 are increased, which leads to an increase in material loss. Of course, in some other embodiments, the first magnetic gap 18 may be close to the central magnet 14, which is not limited in this application.
In some embodiments, referring to fig. 1 to 5, the magnetic circuit system 1 includes a plurality of side magnets 15, and the plurality of side magnets 15 are symmetrically disposed around the central magnet 14, so that the first voice coil 21 and the second voice coil 31 are uniformly stressed during vibration, providing better vibration performance. Gaps are formed between adjacent edge magnets 15, and the connecting piece 23 can be connected to the first voice coil 21 located outside while avoiding the edge magnets 15 by the gaps.
In some embodiments, referring to fig. 1-5, the magnetic circuit system 1 is rectangular or oval, and the central magnet 14 is correspondingly rectangular or oval. The side magnet 15 is arranged on the long axis side of the magnetic circuit system 1, so that the magnetic gap is positioned on the long axis side, and the magnetic gap is arranged on the long axis side, so that more magnetic gaps can be obtained relatively to meet the requirement of magnetic performance. The long axis end of the central portion 12 may be flush with the inside of the long axis end of the frame portion 13 up and down, and when the first voice coil 21 and the second voice coil 31 are located in the magnetic circuit system 1, the magnetic gap of the long side of the voice coils may be smaller, and the voice coils may obtain higher magnetic performance, so that the product performance is better.
In some embodiments, referring to fig. 1 to 5, the connecting plate 23 protrudes towards the short axis side of the magnetic circuit system 1 and is connected to one end of the first voice coil 21, and the connecting plate 23 can be connected to the bottom end of the first voice coil 21 due to the absence of the interference of the side magnet, so as to provide a mounting and moving space for the vibration of the connecting plate 23.
In some embodiments, referring to fig. 3, the connecting wall is located at the short shaft end of the magnetic circuit system 1, the connecting wall is connected to the inner edge of the frame body 13, and the first voice coil 21 is located at the outer side of the connecting wall, so that the internal structure of the present application is optimized, and the structure at the outer side of the first voice coil 21 is reduced to provide sufficient installation space for the connecting piece 23.
In some embodiments, referring to fig. 5, the first vibration system 2 includes a plurality of connection pads 23, and the plurality of connection pads 23 are symmetrically connected to the first voice coil 21 to provide balanced stress to the first voice coil 21 and ensure its acoustic performance.
In some embodiments, referring to fig. 1 to 8, the magnetic suspension further includes a first housing component 4, the washer 17 and the first diaphragm 22 and the connecting plate 23 of the first vibration system 2 are held in the first housing component 4, and the first housing component 4 is used for supporting the first vibration component 2 and keeping fixed connection with the magnetic circuit system 1.
And/or the second shell assembly 5 is further included, and the frame body part 13 of the magnetic yoke 11 and the second vibration system 3 are fixedly held on the second shell assembly 5, so as to support the second vibration assembly 3 and keep fixedly connected with the magnetic circuit system 1.
In some embodiments, the fixed connection relationship between the first housing component 4 and the second housing component 5 can be achieved by injection molding and bonding processes, and those skilled in the art can select the connection relationship according to the needs, which is not limited in this application.
In some embodiments, referring to fig. 1 to 5, the first housing component 4 and the second housing component 5 may be respectively disposed on two sides of the magnetic circuit system 1, and are fixed to form a whole by the magnetic circuit system 1. The side of the edge magnet 15 facing away from the central magnet 14 is exposed, reducing the volume of the housing of the sound generating device. The side of the edge magnet 15 facing away from the central magnet 14 may be flush with the outer wall of the first housing component 4 or/and the second housing component 5 to reduce the overall size of the present application.
In some embodiments, when the circuit is provided on the connection pad 23, the first voice coil 21 can also be electrically connected to the outside through the connection pad 23 to transmit an electrical signal. When the second damper 33 is provided with an electric circuit, the second voice coil 31 can be electrically connected to the outside through the second damper 33.
In some embodiments, the first vibration system 2 may further include a first reinforcement portion 24 disposed at a middle position of the first diaphragm 22 for improving the acoustic performance of the first vibration system 2. The second vibration system 3 further includes a second reinforcing portion 34 provided at an intermediate position of the second diaphragm 32 for improving the acoustic performance of the second vibration system 3.
According to another aspect of the present application, the present application also provides an electronic device including a housing and the sound generating device described above disposed within the housing.
In some embodiments, the electronic device may be a notebook computer, a mobile phone, a tablet computer, or the like.
Although some specific embodiments of the present invention have been described in detail by way of illustration, it should be understood by those skilled in the art that the above illustration is only for the purpose of illustration and is not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims (13)

1. A sound production device is characterized by comprising a magnetic circuit system, a first vibration system and a second vibration system, wherein the first vibration system and the second vibration system are respectively positioned on two sides of the magnetic circuit system;
the magnetic circuit system comprises a central magnet positioned in the middle, a first magnetic gap for a first voice coil of the first vibration system to extend into is formed on one surface of the magnetic circuit system, a second magnetic gap for a second voice coil of the second vibration system to extend into is formed on the other surface of the magnetic circuit system, and the first magnetic gap and the second magnetic gap are positioned on the outer side of the central magnet;
at least the first vibration system further comprises a first vibrating diaphragm and a connecting sheet with a folded ring, the first vibrating diaphragm is located at one end, away from the magnetic circuit, of the first voice coil, and the connecting sheet is connected to the bottom end, facing the magnetic circuit, of the first voice coil to limit vertical vibration of the first voice coil in the direction perpendicular to the first magnetic gap.
2. The sound-generating apparatus as claimed in claim 1, wherein the direction of the protrusion of the corrugated rim of the connecting plate is the same as or opposite to the direction of the protrusion of the corrugated rim of the first diaphragm.
3. The sound generating apparatus as claimed in claim 2, wherein the edge of the connecting piece protrudes upward or downward along the vibration direction of the first voice coil.
4. The sound generating apparatus of claim 2, wherein the position of the edge of the connecting sheet is opposite to the position of the edge of the diaphragm.
5. The apparatus according to claim 1, wherein the first vibration system further comprises a first bobbin, the top end of the first voice coil is connected to the first bobbin, and the first diaphragm is connected to a side of the first bobbin facing away from the first voice coil.
6. The apparatus according to claim 1, wherein said first magnetic gaps are staggered from said second magnetic gaps, said first magnetic gaps being remote from said central magnet.
7. The apparatus according to claim 1, wherein the second vibration system further comprises a second diaphragm and a second damper, an end of the second voice coil facing away from the magnetic circuit is connected to the second damper, and the second diaphragm is connected to a side of the second damper facing away from the second voice coil.
8. The sound production device according to claim 1, wherein the magnetic circuit system further comprises a magnetic yoke, a side magnet, a center washer and a side washer, the magnetic yoke comprises a frame body part with a hollow area and a middle part which is opposite to the hollow area and higher than the frame body part, a gap is formed between the center part and the frame body part, and at least two ends of the center part, which are far away from each other, are fixedly connected to the frame body part through connecting walls;
a frame body part of the magnetic guide yoke is upwards provided with a side magnet and a side washer in sequence, and a first magnetic gap is formed between the side washer and the central part of the magnetic guide yoke; the center part of the magnetic guide yoke is downwards provided with a center magnet and a center washer in sequence, the center washer and the frame body part of the magnetic guide yoke form a second magnetic gap for a second voice coil of the second vibration system to extend into, and the first magnetic gap and the second magnetic gap are positioned between the center magnet and the side magnet.
9. The sound generating apparatus as claimed in claim 8, wherein the magnetic circuit system comprises a plurality of side magnets symmetrically disposed outside the central magnet, and the connecting piece is connected to the first voice coil while avoiding the side magnets.
10. The sound generating apparatus as claimed in claim 9, wherein the magnetic circuit system is rectangular or oval, the central magnet is correspondingly rectangular or oval, the connecting wall is located at the short axis end of the magnetic circuit system, the connecting wall is connected to the inner edge of the frame portion, the first voice coil is located at the outer side of the connecting wall, the edge magnet is disposed on the long axis side of the magnetic circuit system, and the connecting piece extends toward the short axis side of the magnetic circuit system and is connected to one end of the first voice coil.
11. The apparatus according to claim 9 wherein said first vibration system comprises a plurality of connecting tabs symmetrically connected to said first voice coil.
12. The sound generating apparatus according to claim 9, further comprising a first housing assembly and a second housing assembly, wherein the first housing assembly and the second housing assembly are respectively disposed on two sides of the magnetic circuit system, and the bezel and the first diaphragm and the connecting plate of the first vibration system are fixed to the first housing assembly; the frame body part of the magnetic guide yoke and the second vibration system are fixedly held on the second shell assembly, and one side of the side magnet, which is far away from the central magnet, is exposed.
13. An electronic device comprising the sound generating apparatus of any one of claims 1-12, wherein a housing is disposed within the housing.
CN201910194928.0A 2019-03-14 2019-03-14 Sound production device and electronic equipment Pending CN111698617A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910194928.0A CN111698617A (en) 2019-03-14 2019-03-14 Sound production device and electronic equipment

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910194928.0A CN111698617A (en) 2019-03-14 2019-03-14 Sound production device and electronic equipment
PCT/CN2019/129732 WO2020181892A1 (en) 2019-03-14 2019-12-30 Sound production apparatus and electronic device

Publications (1)

Publication Number Publication Date
CN111698617A true CN111698617A (en) 2020-09-22

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US20030003945A1 (en) * 2001-05-08 2003-01-02 Shuji Saiki Speaker and mobile terminal device
CN103650531A (en) * 2011-05-18 2014-03-19 Gp声学(英国)有限公司 Loudspeaker with force cancelling configuration
CN102811410A (en) * 2012-08-14 2012-12-05 歌尔声学股份有限公司 Electroacoustic transducer
CN103024639A (en) * 2012-11-29 2013-04-03 郁志曰 Coaxial two-horn driving unit and earphones thereof
CN103297905A (en) * 2013-06-07 2013-09-11 景智电子股份有限公司 Horn device capable of reducing resonance voice
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