CN110149575A - A kind of sounding device - Google Patents
A kind of sounding device Download PDFInfo
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- CN110149575A CN110149575A CN201910477379.8A CN201910477379A CN110149575A CN 110149575 A CN110149575 A CN 110149575A CN 201910477379 A CN201910477379 A CN 201910477379A CN 110149575 A CN110149575 A CN 110149575A
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- sounding device
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 22
- 229910052742 iron Inorganic materials 0.000 claims description 11
- 230000006698 induction Effects 0.000 description 25
- 238000009826 distribution Methods 0.000 description 15
- 239000012528 membrane Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 238000005452 bending Methods 0.000 description 7
- 230000001965 increasing effect Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000010295 mobile communication Methods 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/025—Magnetic circuit
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
The present invention discloses a kind of sounding device, magnetic circuit system includes conductive magnetic yoke and center magnetic path portion and side magnetic circuit part on the bottom wall of the conductive magnetic yoke, magnetic gap is formed between the center magnetic path portion and the side magnetic circuit part, wherein, the center magnetic path portion includes the centring magnet being set side by side from lower to upper and center magnet assembly；The magnet when magnetic circuit part includes being set side by side from lower to upper and side magnet assembly；The centring magnet is different with the polarity of the magnetic pole of one end of the bottom wall close to the conductive magnetic yoke of the side magnet, and the polarity of the magnetic pole of one end far from the conductive magnetic yoke is also different；At least one of the center magnet assembly and the side magnet assembly are permanent magnet, and magnetic pole of the permanent magnet close to one end of the magnetic gap is identical as the separate polarity of magnetic pole of one end of bottom wall of the conductive magnetic yoke of the centring magnet or the side magnet being set side by side.Sounding device acoustical behavior in the present invention is more preferable.
Description
Technical field
The present invention relates to sound energy switch technology field, in particular to a kind of sounding devices.
Background technique
Miniature sounding device is electroacoustic converting member important in mobile communication equipment, for converting the electrical signal to sound
Sound is used to constitute the components such as the loudspeaker, earpiece, earphone of mobile communication equipment.With the hair of mobile communication equipment industry
Exhibition, miniature sounding device industry is rapidly developed, and the requirement for miniature sounding device performance is higher and higher.
Wherein, moving-coil type sounding device is widely applied a kind of specific sounding device structure in mobile communication equipment, existing
There is moving-coil type sounding device as shown in Figure 1, generally including shell and the vibrational system that is fixed on shell of receiving and magnetic circuit system,
Wherein, vibrational system includes vibrating diaphragm and voice coil 04, and magnetic circuit system formation magnetic gap is to accommodate voice coil, after being passed through electric current in voice coil,
Voice coil forced vibration under the action of the magnetic field of magnetic circuit system, and then drive diaphragm oscillations sounding.
In the structure of existing sounding device, magnetic circuit system generally includes conductive magnetic yoke 01 and the center magnetic in conductive magnetic yoke 01
Road part and side magnetic circuit part, center magnetic path portion include centring magnet 021 and center magnetic conductive board 022, and side magnetic circuit part includes
While magnet 031 and while magnetic conductive board 032, centring magnet 021 and side magnet 031 magnetize in vertical direction, and the side of magnetizing of the two
To on the contrary, conductive magnetic yoke 01 and magnetic conductive board are for assembling the magnetic induction line that two magnet generate and guiding its trend, enhancing is located at
Magnetic field strength in magnetic gap.Magnetic induction line as shown in connection with fig. 2 is distributed diagram, magnetic structure in the prior art, sounding dress
It is more flat to set magnetic circuit, magnet short-cut path phenomenon is easy to appear on the outside of the magnet of side, (conducting wire of a fixing turn is long for driving force factors BL value
L is spent multiplied by unit area magnetic flux density B) it is not high, magnetic field cannot make full use of, and the sensitivity of sounding device is not high, affect hair
The acoustical behavior of acoustic device.And it when in the prior art, adjusting BL (x) curve symmetry, needs by magnet and magnetic conductive board
The modes such as design height are re-molded, design cost is increased.
Summary of the invention
The technical problems to be solved by the present invention are: overcoming the problems of the prior art, it is more preferable to provide a kind of acoustical behavior
Sounding device.
In order to solve the above technical problems, the technical scheme is that a kind of sounding device, including vibrational system and magnetic circuit
System, the vibrational system include vibrating diaphragm and the voice coil in conjunction with the vibrating diaphragm, and the magnetic circuit system includes conductive magnetic yoke and is set to
Center magnetic path portion and side magnetic circuit part on the bottom wall of the conductive magnetic yoke, the center magnetic path portion and the side magnetic circuit part
Between form magnetic gap, the voice coil protrudes into the magnetic gap, wherein
The center magnetic path portion includes the centring magnet being set side by side from lower to upper and center magnet assembly；
The magnet when magnetic circuit part includes being set side by side from lower to upper and side magnet assembly；
The centring magnet is different with the polarity of the magnetic pole of one end of the bottom wall close to the conductive magnetic yoke of the side magnet,
The polarity of the magnetic pole of one end far from the conductive magnetic yoke is also different；
At least one of the center magnet assembly and the side magnet assembly are permanent magnet, and the permanent magnet is close to the magnetic
The magnetic pole of the one end in gap and the bottom wall far from the conductive magnetic yoke of the centring magnet or the side magnet that are set side by side
The polarity of the magnetic pole of one end is identical.
As a kind of perferred technical scheme, the centring magnet is rectangle, and the centring magnet includes opposite two
First while and it is two second opposite while；
It is described when magnetic circuit part includes positioned at the centring magnet two first on the outside of two in magnet and two
Magnet assembly；Alternatively, described when magnetic circuit part includes positioned at two first of the centring magnet and on the outside of two the second sides
Four magnet assemblies in magnet and four.
As a kind of perferred technical scheme, the magnetizing direction of the centring magnet and the side magnet is parallel to the vibration
Vibration of membrane direction, the direction of vibration of the magnetizing direction of the permanent magnet perpendicular to the vibrating diaphragm.
As a kind of perferred technical scheme, the center magnet assembly is permanent magnet, and the side magnet assembly is magnetizer；
The center magnet assembly includes two the first magnet at least corresponding with two the first sides of the centring magnet, institute
It states two the first magnet and is spaced apart from each other setting.
As a kind of perferred technical scheme, the center magnet assembly include with two the first sides of the centring magnet and
Corresponding four the first magnet in two the second sides, four first magnet are spaced apart from each other setting；
It is described when magnetic circuit part includes positioned at the centring magnet two first on the outside of two side magnet and two the
Two magnetizers, described two second magnetizers are that mutually independent structure or described two second magnetizers pass through interconnecting piece
It is connected as one；Alternatively, described when magnetic circuit part includes positioned at two first of the centring magnet and two second
Magnet and four the second magnetizers when four on the outside of, four second magnetizers are mutually independent structure, Huo Zhesuo
Four the second magnetizers are stated to be connected as one by interconnecting piece.
As a kind of perferred technical scheme, each first magnet includes the rectangle close to magnetic gap setting
Part and the trapezoidal portions being arranged far from the magnetic gap, the trapezoidal portions include two bevel edges, two neighboring first magnetic
The bevel edge of the trapezoidal portions of iron is opposite and interval is arranged.
As a kind of perferred technical scheme, the center magnet assembly is the first magnetizer, and the side magnet assembly is permanent magnetism
Body；
It is described when magnetic circuit part includes positioned at the centring magnet two first on the outside of two side magnet and two the
Two magnet；Alternatively, described when magnetic circuit part includes positioned at two first of the centring magnet and on the outside of two the second sides
Four side magnet and four the second magnet.
As a kind of perferred technical scheme, the center magnet assembly is permanent magnet, and the side magnet assembly is permanent magnet；
The center magnet assembly includes two the first magnet corresponding with two the first sides of the centring magnet, and described two
A first magnet is spaced apart from each other setting, or include with two first of the centring magnet while and corresponding four at two second,
A first magnet, four first magnet are spaced apart from each other；
It is described when magnetic circuit part includes positioned at the centring magnet two first on the outside of two side magnet and two the
Two magnet；Alternatively, described when magnetic circuit part includes positioned at two first of the centring magnet and on the outside of two the second sides
Four side magnet and four the second magnet.
As a kind of perferred technical scheme, the center magnet assembly is permanent magnet, and the side magnet assembly is permanent magnet；
The magnetizing direction of the centring magnet and the side magnet is in the inclined side of direction of vibration relative to the vibrating diaphragm
Upwards, the magnetizing direction of the magnetizing direction of the centring magnet and the side magnet forms the first angle, first angle
Opening direction deviates from the bottom wall of the conductive magnetic yoke；
The magnetizing direction of the center magnet assembly and the side magnet assembly is put down where the bottom wall relative to the conductive magnetic yoke
On the inclined direction in face, the magnetizing direction of the magnetizing direction of the center magnet assembly and the side magnet assembly forms the second angle,
The opening direction of second angle is towards the conductive magnetic yoke bottom wall.
As a kind of perferred technical scheme, the magnetizing direction of the centring magnet and the side magnet is relative to the vibration
The inclined angle in vibration of membrane direction is to be less than or equal to 45 ° more than or equal to 0 °；
The magnetizing direction of the center magnet assembly and the side magnet assembly is relative to plane where the bottom wall of the conductive magnetic yoke
Inclined angle is to be less than or equal to 45 ° greater than 0 °.
As a kind of perferred technical scheme, the center magnet assembly includes two the first sides pair with the centring magnet
Two the first magnet answered, described two first magnet are spaced apart from each other setting, or include two with the centring magnet
Four the first magnet corresponding with two the second sides, four first magnet are spaced apart from each other on one side；
It is described when magnetic circuit part includes positioned at the centring magnet two first on the outside of two side magnet and two the
Two magnet；Alternatively, described when magnetic circuit part includes positioned at two first of the centring magnet and on the outside of two the second sides
Four side magnet and four the second magnet.
As a kind of perferred technical scheme, two the first sides of the centring magnet are long side, and two the second sides are short
Side.
After above-mentioned technical proposal, the beneficial effects of the present invention are:
Sounding device of the invention can mitigate side magnetic circuit by adding permanent magnet on centring magnet and/or side magnet
Partial magnet short-cut path phenomenon enhances the magnetic field strength in magnetic gap, proposes high bl-values, improves field drives power, to promote acoustics spirit
Sensitivity.
Further, the magnetizing direction of the centring magnet and the side magnet can be parallel to the vibration vibration of membrane side
To, and the magnetizing direction of the permanent magnet is perpendicular to the direction of vibration of the vibrating diaphragm.Alternatively, the permanent magnet even center
The magnetizing direction of magnet and the side magnet is obliquely installed on the basis of above-mentioned direction, by the deflection of magnetizing direction,
Improve the symmetry of BL (x), to reduce distortion.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is sounding device structure in the prior art.
Fig. 2 is the magnetic induction line distribution map of the magnetic circuit system of sounding device in the prior art；
Fig. 3 is the diagrammatic cross-section of sounding device in the embodiment of the present invention one；
Fig. 4 is the decomposition texture schematic diagram of sounding device in Fig. 3；
Fig. 5 is the magnetic induction line distribution map of the magnetic circuit system of sounding device in Fig. 3；
Fig. 6 is BL (X) curve comparison schematic diagram of sounding device of the present invention with sounding device in the prior art；
Fig. 7 is the diagrammatic cross-section of sounding device in the embodiment of the present invention two；
Fig. 8 is the decomposition texture schematic diagram of sounding device in Fig. 7；
Fig. 9 is the top view of sounding device in Fig. 7；
Figure 10 is the magnetic induction line distribution map of the magnetic circuit system of sounding device in Fig. 7；
Figure 11 is the diagrammatic cross-section of three kinds of sounding devices of the embodiment of the present invention；
Figure 12 is the magnetic induction line distribution map of the magnetic circuit system of sounding device in Figure 11；
Figure 13 is the decomposition texture schematic diagram of sounding device in Figure 11；
Figure 14 is sounding device diagrammatic cross-section in the embodiment of the present invention four；
Figure 15 is the magnetic induction line distribution map of the magnetic circuit system of sounding device in Figure 14.
Figure 16 is BL (X) curve graph of sounding device in Figure 14.
Drawing reference numeral explanation:
1, conductive magnetic yoke, 21, centring magnet, the 22, first magnetizer, the 23, first magnet, 31, side magnet, the 32, second magnetic conduction
Body, the 33, second magnet, 4, voice coil, the BL curve of A, in the prior art sounding device, the BL curve of sounding device in B, Fig. 3, C,
The BL curve of sounding device in Fig. 7, the BL curve of sounding device in D, Figure 11, the BL curve of sounding device in E, Figure 14.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
It is to be appreciated that if relating to directionality instruction (such as up, down, left, right, before and after ...) in the embodiment of the present invention,
Then directionality instruction be only used for explain under a certain particular pose (as shown in the picture) between each component relative positional relationship,
Motion conditions etc., if the particular pose changes, directionality instruction is also correspondingly changed correspondingly.
In addition, being somebody's turn to do " first ", " second " etc. if relating to the description of " first ", " second " etc. in the embodiment of the present invention
Description be used for description purposes only, be not understood to indicate or imply its relative importance or implicitly indicate indicated skill
The quantity of art feature." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one spy
Sign.It in addition, the technical solution between each embodiment can be combined with each other, but must be with those of ordinary skill in the art's energy
It is enough realize based on, will be understood that the knot of this technical solution when conflicting or cannot achieve when occurs in the combination of technical solution
Conjunction is not present, also not the present invention claims protection scope within.
Embodiment one:
The present invention proposes a kind of sounding device, which, which can be used in earphone, mobile phone etc., is capable of the electronics of sounding and sets
In standby.
Incorporated by reference to shown in reference Fig. 3 and Fig. 4, sounding device specifically includes vibrational system and magnetic circuit system, the vibration system
System includes vibrating diaphragm and the voice coil 4 in conjunction with the vibrating diaphragm, and the magnetic circuit system includes conductive magnetic yoke 1 and set on the conductive magnetic yoke 1
Center magnetic path portion and side magnetic circuit part on bottom wall are formed between magnetic between the center magnetic path portion and the side magnetic circuit part
Gap, the voice coil 4 protrudes into the magnetic gap, and after being passed through electric current in voice coil 4, voice coil 4 is under the action of the magnetic field of magnetic circuit system
Forced vibration, and then drive diaphragm oscillations sounding.
Wherein, the center magnetic path portion includes the centring magnet 21 and center magnet assembly being set side by side from lower to upper；Institute
State magnet 31 and side magnet assembly when magnetic circuit part includes being set side by side from lower to upper.The centring magnet 21 and the side magnetic
The polarity of the magnetic pole of one end of the bottom wall close to the conductive magnetic yoke 1 of iron 31 is different, the magnetic pole of one end far from the conductive magnetic yoke 1
Polarity it is also different；At least one of the center magnet assembly and the side magnet assembly are permanent magnet, and the permanent magnet is close
The separate magnetic conduction of the magnetic pole of one end of the magnetic gap and the centring magnet 21 or the side magnet 31 that are set side by side
The polarity of the magnetic pole of one end of the bottom wall of yoke 1 is identical.The center magnet assembly or the side magnet assembly are not using permanent magnet
In the case of, then magnetizer is used, itself cannot form magnetic field, be only used for aggregation magnetic induction line and constrain the trend of magnetic induction line, add
The strong magnetic strength line density for passing through voice coil 4.
Sounding device in the present embodiment not only may be used by adding permanent magnet on centring magnet 21 and/or side magnet 31
To mitigate the magnet short-cut path phenomenon of side magnetic circuit part, enhance the magnetic field strength in magnetic gap, propose high bl-values, improves field drives power,
To promote acoustic sensitiveness.
Wherein, the centring magnet 21 is rectangle, and the centring magnet 21 includes opposite two the first sides and opposite
Two the second sides, specifically, two the first sides are preferably the long side of centring magnet 21, two the second sides are the short of center magnet 21
Side.
It is described when magnetic circuit part includes positioned at the centring magnet 21 two first on the outside of two side magnet 31 and two
A side magnet assembly；Alternatively, described when magnetic circuit part includes positioned at two first of the centring magnet 21 and two the second sides
The magnet assembly in magnet 31 and four of four of outside.It is preferred that side magnet 31, Ke Yizeng is arranged in the long side in centring magnet 21
The volume of big permanent magnet, increases the magnetic field strength of magnetic circuit system as far as possible.Specifically, in the present embodiment, in the default of sounding device
In the case that size is sufficiently large, when magnetic circuit component includes positioned at two first of the centring magnet 21 and outside two the second sides
The magnet assembly in magnet 31 and four of four of side, each edge corresponding to centring magnet 21 are respectively provided with one to be arranged above and below
The magnet 31 in magnet assembly and one.
In this specific embodiment, referring to Fig. 3, arrow direction is magnetizing direction, the centring magnet 21 and the side magnet
31 magnetizing direction is parallel to the direction of vibration of the vibrating diaphragm, and the magnetizing direction of the permanent magnet is perpendicular to the vibration vibration of membrane
Direction, according to the location status where sounding device shown in Fig. 3, it is understood that be, centring magnet 21 and side magnet 31
Magnetizing direction is vertical direction, and the magnetizing direction of permanent magnet is horizontal direction.Wherein, centring magnet 21 and side magnet 31 magnetize
It is contrary.
In conjunction with shown in Fig. 3 and Fig. 4, in the present embodiment, the center magnet assembly is one be set on centring magnet 21
First magnetizer 22, the side magnet assembly use permanent magnet.Specifically, the side magnetic circuit part includes being located at the centring magnet
Two first of 21 while and at two second, on the outside of four side magnet 31 and four the second magnet 33, correspond to centring magnet 21
Each edge be respectively provided with second magnet 33 and a side magnet 31 being arranged above and below.It is spaced using four the second magnet 33
Setting, on the one hand magnetize simple process, on the other hand forms notch between four the second magnet 33, is used to form connection sounding dress
Inside and outside channel design is set, is conducive to vibration of membrane smoothness of shaking, and the notch in corner can be the bending segment of voice coil leads
Accommodating space is provided, does not need individually to reserve the space on laterally or longitudinally for voice coil leads.
In other embodiments, in the lesser situation of the pre-set dimension of sounding device, only at centring magnet 21 two first
At outside setting two in the case where magnet 31, two the second magnet 33 are correspondingly arranged on two side magnet 31, at center
On the outside of two the second sides of magnet 21, the edge of conductive magnetic yoke 1 is correspondingly provided with bending side wall, bending side wall and center magnetic path portion it
Between form magnetic gap.
Specifically, the magnetic pole referring to magnet in Fig. 3 marks, the magnetic pole of one end close to the magnetic gap of the second magnet 33
With identical, the second magnetic far from the polarity of magnetic pole of one end of bottom wall of the conductive magnetic yoke 1 for the side magnet 31 being set side by side
The bottom close to the conductive magnetic yoke 1 of the magnetic pole of one end far from the magnetic gap of iron 33 and the side magnet 31 being set side by side
The polarity of the magnetic pole of one end of wall is identical.
In the present embodiment, by be further added by the top in magnet 31 magnetized vertically setting with while magnet 31 the side of magnetizing
To the second vertical magnet 33, the flow direction of magnetic induction line can be limited, increases the magnetic strength line density of magnetic gap, mitigates side magnetic circuit
Partial magnet short-cut path phenomenon, Fig. 5 are the magnetic induction line distribution map of the magnetic circuit system in the present embodiment, and Fig. 2 is magnetic in the prior art
The magnetic induction line distribution map of road system, as shown in Fig. 5 and Fig. 2, compared to the prior art in side magnetic conductive board, in the present embodiment,
Magnetic induction line flow density in two magnet 33 increases, and the magnetic strength line density of magnetic gap increases, and the side magnetic circuit in the present embodiment
Partial magnet short-cut path phenomenon be improved significantly.Further combined with Fig. 6 and following table 1, simulation result is shown, in the present embodiment
The BL value of sounding device improves a lot compared to the prior art, and in Fig. 6, curve B is that the BL of the sounding device of the present embodiment is bent
Line, curve A are the BL curve of prior art sounding device, and when not being passed through electric current in voice coil 4, prior art sounding device BL value is
0.78, and the BL value of the present embodiment sounding device is increased to 0.86, it is clear that the field drives Li Genggao in the present embodiment, sounding dress
The acoustic sensitiveness set is higher, and acoustical behavior is more preferable.
Table 1
Embodiment two:
Incorporated by reference to shown in reference Fig. 7, Fig. 8 and Fig. 9, the difference of sounding device and embodiment one in the present embodiment exists
In: center magnet assembly described in the present embodiment is permanent magnet, and the side magnet assembly is magnetizer.
In the present embodiment, referring to Fig. 7, arrow direction is magnetizing direction, the centring magnet 21 and the side magnet 31
Magnetizing direction is parallel to the direction of vibration of the vibrating diaphragm, and the magnetizing direction of the permanent magnet is perpendicular to the vibration vibration of membrane side
To according to the location status where sounding device shown in Fig. 7, it is understood that be that centring magnet 21 and side magnet 31 fill
Magnetic direction is vertical direction, and the magnetizing direction of permanent magnet is horizontal direction.Wherein, the side of magnetizing of centring magnet 21 and side magnet 31
To opposite.
Wherein, the center magnet assembly includes at least two first corresponding with two the first sides of the centring magnet 21
Magnet 23, described two first magnet 23 are spaced apart from each other setting.As a specific embodiment, the center magnet assembly include with
Corresponding four first magnet 23 while with two second of two first of the centring magnet 21, four first magnet 23
It is spaced apart from each other setting, and the edge pair of the one side edge of the close magnetic gap of four the first magnet 23 and the centring magnet 21
Together.Using the design of two the first magnet 23, or using the design of four the first magnet 23, magnetize simple process, magnet
High reliablity.
Specifically, the magnetic pole referring to magnet in Fig. 7 marks, the magnetic pole of one end close to the magnetic gap of the first magnet 23
It is identical as the separate polarity of magnetic pole of one end of bottom wall of the conductive magnetic yoke 1 of the centring magnet 21 being set side by side, first
The close conductive magnetic yoke 1 of the magnetic pole of one end far from the magnetic gap of magnet 23 and the centring magnet 21 being set side by side
Bottom wall one end magnetic pole polarity it is identical.
Further, as shown in figure 9, each first magnet 23 includes the rectangular portion close to magnetic gap setting
Divide 231 and the trapezoidal portions 232 far from magnetic gap setting, the trapezoidal portions 232 include two bevel edges, two neighboring
The bevel edge of the trapezoidal portions 232 of first magnet 23 is opposite and interval is arranged.This design increases the body of the first magnet 23 as far as possible
Product, and facilitate the positioning when assembly of the first magnet 23, convenient for the assembling with other parts.
Specifically, it is described when magnetic circuit part includes positioned at the centring magnet 21 two first on the outside of two side magnet
31 and two the second magnetizers 32, described two second magnetizers 32 are that mutually independent structure or described two second are led
Magnet 32 is connected as one by interconnecting piece；Alternatively, the side magnetic circuit part includes positioned at the two of the centring magnet 21
A first while and at two second, on the outside of four side magnet 31 and four the second magnetizers 32, four second magnetizers 32
It is connected as one for mutually independent structure or four second magnetizers 32 by interconnecting piece.Two or four
When second magnetizer 32 is connected as one, in the bending fragment position future insufficiency of corresponding voice coil leads, for accommodating bending
Section；And the design of integral structure facilitates the second magnetizer 32 and the shell of sounding device to be assembled, such as can pass through one
Secondary positioning, four the second magnetizers 32 with shell are subjected to injection molding in conjunction with.
In the present embodiment, by being further added by filling for setting and centring magnet 21 in the top of the centring magnet 21 to magnetize vertically
The first vertical magnet 23 of magnetic direction, can limit the flow direction of magnetic induction line, increase the magnetic strength line density of magnetic gap, Tu10Wei
The magnetic induction line distribution map of magnetic circuit system in the present embodiment, Fig. 2 are the magnetic induction line distribution map of magnetic circuit system in the prior art, such as
Shown in Figure 10 and Fig. 2, compared to the prior art in center magnetic conductive board, in the present embodiment, the magnetic induction line stream in the first magnet 23
Dynamic density increases, and the magnetic strength line density of the magnetic gap part in the present embodiment is significantly increased.Further combined with Fig. 6 and
Table 1 above, simulation result show that the BL value of sounding device improves a lot compared to the prior art in the present embodiment, Fig. 6
In, curve C is the BL curve of the sounding device of the present embodiment, and curve A is the BL curve of prior art sounding device, in voice coil 4
When not being passed through electric current, prior art sounding device BL value is 0.78, and the BL value of the present embodiment sounding device is increased to 0.85, shows
Field drives Li Genggao in right the present embodiment, the acoustic sensitiveness of sounding device is higher, and acoustical behavior is more preferable.
Embodiment three:
Incorporated by reference to shown in reference Figure 11 and Figure 13, the difference of sounding device and embodiment one in the present embodiment exists
In: center magnet assembly described in the present embodiment is permanent magnet, and the side magnet assembly is also permanent magnet.
In the present embodiment, referring to Figure 11, arrow direction is magnetizing direction, the centring magnet 21 and the side magnet 31
Magnetizing direction is parallel to the direction of vibration of the vibrating diaphragm, and the magnetizing direction of the permanent magnet is perpendicular to the vibration vibration of membrane side
To according to the location status where sounding device shown in Figure 11, it is understood that be that centring magnet 21 and side magnet 31 fill
Magnetic direction is vertical direction, and the magnetizing direction of permanent magnet is horizontal direction.Wherein, the side of magnetizing of centring magnet 21 and side magnet 31
To opposite.
Specifically, the magnetic pole referring to magnet in Figure 11 marks, the magnetic of one end close to the magnetic gap of the first magnet 23
Pole is identical as the separate polarity of magnetic pole of one end of bottom wall of the conductive magnetic yoke 1 of the centring magnet 21 being set side by side, the
The close magnetic conduction of the magnetic pole of one end far from the magnetic gap of one magnet 23 and the centring magnet 21 being set side by side
The polarity of the magnetic pole of one end of the bottom wall of yoke 1 is identical.Second magnet 33 close to the magnetic gap one end magnetic pole and side by side
The polarity of the magnetic pole of one end of the bottom wall far from the conductive magnetic yoke 1 for the side magnet 31 being arranged is identical, the second magnet 33
The magnetic pole of one end far from the magnetic gap and the one of the bottom wall close to the conductive magnetic yoke 1 for the side magnet 31 being set side by side
The polarity of the magnetic pole at end is identical.
Specifically, the center magnet assembly includes two the first magnetic corresponding with two the first sides of the centring magnet 21
Iron 23, described two first magnet 23 are spaced apart from each other setting, or include and two the first sides of the centring magnet 21 and two
Corresponding four the first magnet 23 in a second side, four first magnet 23 are spaced apart from each other.Wherein, the first magnet 23 is close
The one side edge of magnetic gap is aligned with the edge of the centring magnet 21.Using the design of two the first magnet 23, or use
The design of four the first magnet 23, magnetize simple process, the high reliablity of magnet.
Further, as shown in figure 13, each first magnet 23 includes the rectangle close to magnetic gap setting
Part and the trapezoidal portions being arranged far from the magnetic gap, the trapezoidal portions include two bevel edges, two neighboring first magnetic
The bevel edge of the trapezoidal portions of iron 23 is opposite and interval is arranged.This design increases the volume of the first magnet 23 as far as possible, and square
Just positioning when the first magnet 23 assembles, convenient for the assembling with other parts.
Specifically, it is described when magnetic circuit part includes positioned at the centring magnet 21 two first on the outside of two side magnet
31 and two the second magnet 33；Alternatively, described when magnetic circuit part includes positioned at two first of the centring magnet 21 and two
Magnet 31 and four the second magnet 33 when a second four on the outside of.Using two the second magnet 33 interval settings, or adopt
With four the second magnet 33 interval settings, on the one hand magnetize simple process, is on the other hand formed and is lacked between four the second magnet 33
Mouthful, the channel design being used to form inside and outside connection sounding device is conducive to vibration of membrane smoothness of shaking, and the notch in corner can
To provide accommodating space for the bending segment of voice coil leads, do not need individually to reserve the space on laterally or longitudinally for voice coil leads.
In the present embodiment, by being further added by filling for setting and centring magnet 21 in the top of the centring magnet 21 to magnetize vertically
The first vertical magnet 23 of magnetic direction, the top in magnet 31 magnetized vertically be further added by setting with while magnet 31 the side of magnetizing
To the second vertical magnet 33, the flow direction of magnetic induction line can be limited, increases the magnetic strength line density of magnetic gap, mitigates side magnetic circuit
Partial magnet short-cut path phenomenon, Figure 12 are the magnetic induction line distribution map of the magnetic circuit system in the present embodiment, and Fig. 2 is magnetic in the prior art
The magnetic induction line distribution map of road system, as shown in Figure 12 and Fig. 2, compared to the prior art in center magnetic conductive board and side magnetic conductive board,
In the present embodiment, the magnetic induction line flow density in the first magnet 23 and the second magnet 33 increases, and the magnetic strength line density of magnetic gap increases
Greatly, the magnet short-cut path phenomenon of the side magnetic circuit part and in the present embodiment be improved significantly.Further combined with Fig. 6 and following table
1, simulation result is shown, the BL value of sounding device improves a lot compared to the prior art in the present embodiment, and in Fig. 6, curve D is
The BL curve of the sounding device of the present embodiment, curve A are the BL curve of prior art sounding device, are not passed through electric current in voice coil 4
When, prior art sounding device BL value is 0.78, and the BL value of the present embodiment sounding device is increased to 0.88, it is clear that the present embodiment
In field drives Li Genggao, the acoustic sensitiveness of sounding device is higher, and acoustical behavior is more preferable.
Example IV:
Incorporated by reference to shown in reference Figure 14, sounding device and embodiment three in the present embodiment the difference is that: this reality
It applies center magnet assembly described in example and side magnet assembly is all made of permanent magnet, also, combine in Figure 14 and filled indicated by arrow direction
Magnetic direction, positioned at the two sides of magnetic gap, the magnetizing direction of the centring magnet 21 and the side magnet 31 is relative to the vibration
On the inclined direction in vibration of membrane direction, the magnetizing direction of the centring magnet 21 and the magnetizing direction of the side magnet 31 are formed
First angle, the opening direction of first angle deviate from the bottom wall of the conductive magnetic yoke 1；The center magnet assembly and the side magnetic
The magnetizing direction of component where the bottom wall relative to the conductive magnetic yoke 1 on the inclined direction of plane, the center magnet assembly
The magnetizing direction of magnetizing direction and the side magnet assembly forms the second angle, and the opening direction of second angle is led described in
1 bottom wall of magnetic yoke.
According to the location status where sounding device shown in Figure 14, it is understood that be centring magnet 21 and side magnet
There is angle, the magnetizing direction and water of the center magnet assembly and the side magnet assembly between 31 magnetizing direction and vertical direction
There is square between angle.
Specifically, direction of vibration of the magnetizing direction of the centring magnet 21 and the side magnet 31 relative to the vibrating diaphragm
Inclined angle is to be less than or equal to 45 ° more than or equal to 0 °；The magnetizing direction of the center magnet assembly and the side magnet assembly is opposite
The inclined angle of plane where the bottom wall of the conductive magnetic yoke 1 is to be less than or equal to 45 ° greater than 0 °.
As a kind of specific embodiment, the magnetizing direction of the centring magnet 21 and the side magnet 31 is parallel to vibrating diaphragm
Direction of vibration, namely in the vertical direction, and centring magnet 21 is opposite with the magnetizing direction of side magnet 31.Also, it is described
The magnetizing direction of center magnet assembly and the side magnet assembly relative to the conductive magnetic yoke 1 bottom wall where the inclined angle of plane be
It is less than or equal to 45 ° greater than 0 °.Alternatively, the centring magnet 21 is parallel to the direction of vibration of vibrating diaphragm as another specific embodiment,
Namely in the vertical direction, the magnetizing direction of the side magnet 31 is big relative to the inclined angle of direction of vibration of the vibrating diaphragm
It is less than or equal to 45 ° in 0 °, also, the magnetizing direction of the center magnet assembly and the side magnet assembly is relative to the conductive magnetic yoke 1
Bottom wall where the inclined angle of plane be greater than 0 ° be less than or equal to 45 °.
Specifically, the center magnet assembly includes corresponding with two the first sides of the centring magnet 21 in the present embodiment
Two the first magnet 23, described two first magnet 23 are spaced apart from each other setting, or include with the centring magnet 21 two
A first while with two second corresponding four the first magnet 23, four first magnet 23 be spaced apart from each other, wherein first
The one side edge of the close magnetic gap of magnet 23 is aligned with the edge of the centring magnet 21.Using setting for two the first magnet 23
Meter, or using the design of four the first magnet 23, magnetize simple process, the high reliablity of magnet.
It is described when magnetic circuit part includes positioned at the centring magnet 21 two first on the outside of two side magnet 31 and two
A second magnet 33；Alternatively, described when magnetic circuit part includes positioned at two first of the centring magnet 21 and two second
Magnet 31 and four the second magnet 33 when four on the outside of.Using two the second magnet 33 interval settings, or use four
The setting of second magnet 33 interval, on the one hand magnetize simple process, on the other hand forms notch between four the second magnet 33, is used for
The channel design inside and outside connection sounding device is formed, is conducive to vibration of membrane smoothness of shaking, and the notch in corner can be sound
The bending segment for enclosing lead provides accommodating space, does not need individually to reserve the space on laterally or longitudinally for voice coil leads.
In the present embodiment, by increasing again in the top of centring magnet 21 magnetized vertically or the inclination of opposed vertical direction is magnetized
It adds and sets relatively horizontal orientation and tilt the first magnet 23 for magnetizing, and magnetizing vertically or the inclination of opposed vertical direction is magnetized
The top of side magnet 31 is further added by setting relatively horizontal orientation and tilts the second magnet 33 to magnetize, can limit the flowing of magnetic induction line
Direction adjusts magnetic strength linear-density distribution in magnetic gap, mitigates the magnet short-cut path phenomenon of side magnetic circuit part, and Figure 15 is in the present embodiment
The magnetic induction line distribution map of magnetic circuit system, Fig. 2 is the magnetic induction line distribution map of magnetic circuit system in the prior art, such as Figure 15 and Fig. 2 institute
Show, compared to the prior art in center magnetic conductive board and side magnetic conductive board, in the present embodiment, in the first magnet 23 and the second magnet 33
Magnetic induction line flow density increase, magnetic strength linear-density distribution changes in magnetic gap, and the side magnetic circuit part in the present embodiment
Magnet short-cut path phenomenon be improved significantly.Further combined with Fig. 6 and following table 1, simulation result is shown, sounding in the present embodiment
The BL value of device improves a lot compared to the prior art, and in Fig. 6, curve E is the BL curve of the sounding device of the present embodiment, bent
Line A is the BL curve of prior art sounding device, and when not being passed through electric current in voice coil 4, prior art sounding device BL value is 0.78,
And the BL value of the present embodiment sounding device is increased to 0.88, it is clear that the field drives Li Genggao in the present embodiment, sounding device
Acoustic sensitiveness is higher, and acoustical behavior is more preferable.
And in conjunction with reference to shown in Figure 16, curve E1, E2, E3, E4 are adjustment centring magnet 21, side magnet 31, the first magnetic
The four BL curves obtained after the magnetizing direction of at least one of iron 23 and the second magnet 33, curve A are prior art sounding
The BL curve of device, by comparing it is found that passing through in the range of the set angle of the aforementioned magnetizing direction as defined in the present embodiment
Change magnetizing direction, compared to the prior art increase BL value in the case where, the symmetry of BL curve can also be adjusted, be allowed to
The stiffness K of vibrational systemMSCurve matches, and improves distortion phenomenon, promotes the acoustical behavior of sounding device.And by adjusting filling
Magnetic direction and then the method for adjusting BL curve symmetry, compared to the prior art in by changing voice coil structure or changing entire magnetic
The mode of line structure, simple process greatly reduce production cost.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all in the present invention
Inventive concept under, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/be used in it indirectly
He is included in scope of patent protection of the invention relevant technical field.
Claims (12)
1. a kind of sounding device, including vibrational system and magnetic circuit system, the vibrational system include vibrating diaphragm and with the vibrating diaphragm knot
The voice coil of conjunction, the magnetic circuit system include conductive magnetic yoke and center magnetic path portion and side magnetic circuit on the bottom wall of the conductive magnetic yoke
Part forms magnetic gap between the center magnetic path portion and the side magnetic circuit part, the voice coil protrudes into the magnetic gap,
It is characterized by:
The center magnetic path portion includes the centring magnet being set side by side from lower to upper and center magnet assembly；
The magnet when magnetic circuit part includes being set side by side from lower to upper and side magnet assembly；
The centring magnet is different with the polarity of the magnetic pole of one end of the bottom wall close to the conductive magnetic yoke of the side magnet, separate
The polarity of the magnetic pole of one end of the conductive magnetic yoke is also different；
At least one of the center magnet assembly and the side magnet assembly are permanent magnet, and the permanent magnet is close to the magnetic gap
One end magnetic pole and the centring magnet that is set side by side or the bottom wall far from the conductive magnetic yoke of the side magnet one end
Magnetic pole polarity it is identical.
2. a kind of sounding device as described in claim 1, which is characterized in that the centring magnet is rectangle, the center magnetic
Iron include opposite two first while and it is two second opposite while；
It is described when magnetic circuit part includes positioned at the centring magnet two first on the outside of two in magnet and two while magnetic portion
Part；Alternatively, four when magnetic circuit part includes positioned at two first of the centring magnet and on the outside of two the second sides
The magnet assembly in magnet and four.
3. a kind of sounding device as claimed in claim 2, which is characterized in that the centring magnet and the side magnet magnetize
It is oriented parallel to the direction of vibration of the vibrating diaphragm, the direction of vibration of the magnetizing direction of the permanent magnet perpendicular to the vibrating diaphragm.
4. a kind of sounding device as claimed in claim 3, which is characterized in that the center magnet assembly is permanent magnet, the side
Magnet assembly is magnetizer；
The center magnet assembly includes two the first magnet at least corresponding with two the first sides of the centring magnet, and described two
A first magnet is spaced apart from each other setting.
5. a kind of sounding device as claimed in claim 4, which is characterized in that
The center magnet assembly include with two first of the centring magnet while and two second whiles corresponding four the first magnetic
Iron, four first magnet are spaced apart from each other setting；
It is described when magnetic circuit part includes positioned at the centring magnet two first on the outside of two side magnet and two second lead
Magnet, described two second magnetizers are that mutually independent structure or described two second magnetizers are connected by interconnecting piece
It is structure as a whole；Alternatively, described when magnetic circuit part includes positioned at two first of the centring magnet and outside two the second sides
The four side magnet and four the second magnetizers of side, four second magnetizers are mutually independent structure or described four
A second magnetizer is connected as one by interconnecting piece.
6. a kind of sounding device as claimed in claim 5, which is characterized in that each first magnet includes close to the magnetic
The rectangular segment of gap setting and the trapezoidal portions being arranged far from the magnetic gap, the trapezoidal portions include two oblique
The bevel edge on side, the trapezoidal portions of two neighboring first magnet is opposite and interval is arranged.
7. a kind of sounding device as claimed in claim 3, which is characterized in that the center magnet assembly is the first magnetizer, institute
Stating side magnet assembly is permanent magnet；
It is described when magnetic circuit part includes positioned at the centring magnet two first on the outside of two side magnet and two the second magnetic
Iron；Alternatively, four when magnetic circuit part includes positioned at two first of the centring magnet and on the outside of two the second sides
Side magnet and four the second magnet.
8. a kind of sounding device as claimed in claim 3, which is characterized in that the center magnet assembly is permanent magnet, the side
Magnet assembly is permanent magnet；
The center magnet assembly includes two the first magnet corresponding with two the first sides of the centring magnet, and described two
One magnet is spaced apart from each other setting, or include with two first of the centring magnet while and two second whiles it is four corresponding
One magnet, four first magnet are spaced apart from each other；
It is described when magnetic circuit part includes positioned at the centring magnet two first on the outside of two side magnet and two the second magnetic
Iron；Alternatively, four when magnetic circuit part includes positioned at two first of the centring magnet and on the outside of two the second sides
Side magnet and four the second magnet.
9. a kind of sounding device as claimed in claim 2, which is characterized in that the center magnet assembly is permanent magnet, the side
Magnet assembly is permanent magnet；
The magnetizing direction of the centring magnet and the side magnet on the inclined direction of direction of vibration relative to the vibrating diaphragm,
The magnetizing direction of the magnetizing direction of the centring magnet and the side magnet forms the first angle, the opening side of first angle
To the bottom wall for deviating from the conductive magnetic yoke；
The magnetizing direction of the center magnet assembly and the side magnet assembly inclines in plane where the bottom wall relative to the conductive magnetic yoke
On oblique direction, the magnetizing direction of the magnetizing direction of the center magnet assembly and the side magnet assembly forms the second angle, described
The opening direction of second angle is towards the conductive magnetic yoke bottom wall.
10. a kind of sounding device as claimed in claim 9, which is characterized in that the centring magnet and the side magnet fill
Magnetic direction is to be less than or equal to 45 ° more than or equal to 0 ° relative to the inclined angle of direction of vibration of the vibrating diaphragm；
The magnetizing direction of the center magnet assembly and the side magnet assembly is relative to plane inclination where the bottom wall of the conductive magnetic yoke
Angle be greater than 0 ° be less than or equal to 45 °.
11. a kind of sounding device as claimed in claim 9, which is characterized in that
The center magnet assembly includes two the first magnet corresponding with two the first sides of the centring magnet, and described two
One magnet is spaced apart from each other setting, or include with two first of the centring magnet while and two second whiles it is four corresponding
One magnet, four first magnet are spaced apart from each other；
It is described when magnetic circuit part includes positioned at the centring magnet two first on the outside of two side magnet and two the second magnetic
Iron；Alternatively, four when magnetic circuit part includes positioned at two first of the centring magnet and on the outside of two the second sides
Side magnet and four the second magnet.
12. a kind of sounding device as described in claim 2 to 11 any claim, which is characterized in that
Two the first sides of the centring magnet are long side, and two the second sides are short side.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910477379.8A CN110149575B (en) | 2019-06-03 | 2019-06-03 | Sounding device |
| PCT/CN2019/128435 WO2020244208A1 (en) | 2019-06-03 | 2019-12-25 | Sound generating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910477379.8A CN110149575B (en) | 2019-06-03 | 2019-06-03 | Sounding device |
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| CN110149575A true CN110149575A (en) | 2019-08-20 |
| CN110149575B CN110149575B (en) | 2024-02-13 |
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| CN201910477379.8A Active CN110149575B (en) | 2019-06-03 | 2019-06-03 | Sounding device |
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| CN (1) | CN110149575B (en) |
| WO (1) | WO2020244208A1 (en) |
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|---|---|---|---|---|
| WO2020244208A1 (en) * | 2019-06-03 | 2020-12-10 | 歌尔股份有限公司 | Sound generating device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109195079A (en) * | 2018-08-14 | 2019-01-11 | 歌尔股份有限公司 | The assemble method and magnetic charging system of magnetic circuit system |
| CN109587606A (en) * | 2018-11-14 | 2019-04-05 | 歌尔股份有限公司 | A kind of sounding device and electronic equipment |
| CN109788405A (en) * | 2018-12-20 | 2019-05-21 | 歌尔股份有限公司 | A kind of sounding device and assemble method |
| CN209823998U (en) * | 2019-06-03 | 2019-12-20 | 歌尔股份有限公司 | Sound production device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN205847557U (en) * | 2016-05-26 | 2016-12-28 | 瑞声声学科技(深圳)有限公司 | Speaker |
| CN205847566U (en) * | 2016-07-01 | 2016-12-28 | 瑞声科技(新加坡)有限公司 | Speaker |
| CN207652688U (en) * | 2017-12-25 | 2018-07-24 | 歌尔科技有限公司 | A kind of acoustical generator |
| CN208462041U (en) * | 2018-08-06 | 2019-02-01 | 歌尔科技有限公司 | Sounding device and electronic equipment |
| CN110149575B (en) * | 2019-06-03 | 2024-02-13 | 歌尔股份有限公司 | Sounding device |
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2019
- 2019-06-03 CN CN201910477379.8A patent/CN110149575B/en active Active
- 2019-12-25 WO PCT/CN2019/128435 patent/WO2020244208A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109195079A (en) * | 2018-08-14 | 2019-01-11 | 歌尔股份有限公司 | The assemble method and magnetic charging system of magnetic circuit system |
| CN109587606A (en) * | 2018-11-14 | 2019-04-05 | 歌尔股份有限公司 | A kind of sounding device and electronic equipment |
| CN109788405A (en) * | 2018-12-20 | 2019-05-21 | 歌尔股份有限公司 | A kind of sounding device and assemble method |
| CN209823998U (en) * | 2019-06-03 | 2019-12-20 | 歌尔股份有限公司 | Sound production device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020244208A1 (en) * | 2019-06-03 | 2020-12-10 | 歌尔股份有限公司 | Sound generating device |
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| WO2020244208A1 (en) | 2020-12-10 |
| CN110149575B (en) | 2024-02-13 |
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