CN207638872U - A kind of sound-producing device - Google Patents
A kind of sound-producing device Download PDFInfo
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- CN207638872U CN207638872U CN201721479329.6U CN201721479329U CN207638872U CN 207638872 U CN207638872 U CN 207638872U CN 201721479329 U CN201721479329 U CN 201721479329U CN 207638872 U CN207638872 U CN 207638872U
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- vibrating diaphragm
- magnetic circuit
- shell
- sound
- producing device
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Abstract
The utility model is related to sound-producing devices, including shell, the vibrating diaphragm being arranged in shell, and two magnetic circuit systems for being symmetricly set on vibrating diaphragm both sides, further include two voice coils for being symmetrically distributed in vibrating diaphragm both sides, one end of each voice coil is connected on vibrating diaphragm, and the other end is combined together with corresponding magnetic circuit system；Each magnetic circuit system is including yoke and the magnet being arranged in yoke；Yoke includes bottom, and is formed in the side of sidewall portion of bottom surrounding position；There are four magnet settings, is distributed in the surrounding position of bottom, and each magnet defines the magnetic gap of magnetic circuit system with corresponding side of sidewall portion.The sound-producing device of the utility model, even if larger displacement occurs for vibrating diaphragm, voice coil can be still combined together with the higher region of magnetic density in magnetic circuit system, so as to substantially reduce the low-frequency distortion of generating means.And the yoke in magnetic circuit system is integrated, and simplifies the assembly of component, and improve the intensity of structure.
Description
Technical field
The utility model is related to electroacoustic conversion arts, more specifically to a kind of sound-producing device.
Background technology
Loud speaker is acoustical device important in electronic equipment comprising shell, installation in the housing vibrating diaphragm, be fixedly connected
Voice coil on vibrating diaphragm and magnetic circuit system.Wherein, voice coil is located in the magnetic gap of magnetic circuit system formation, when voice coil is receiving sound
When frequency signal, diaphragm oscillations are driven under the action of magnetic circuit system, to instigate surrounding air sounding, and then realize electric energy extremely
The conversion of acoustic energy.
This traditional loadspeaker structure, when it is operated in low frequency condition, voice coil will produce larger displacement.Magnetic at this time
Road system weakens the active force of voice coil significantly, in addition the influence of vibrating diaphragm stiffness factor at this time, can cause larger low frequency THD to lose
Very.
Utility model content
There is provided a kind of sound-producing devices for one purpose of the utility model.
One side according to the present utility model, provides a kind of sound-producing device, including shell, shaking of being arranged in shell
Film and magnetic circuit component, the magnetic circuit component include two magnetic circuit systems for being symmetricly set on vibrating diaphragm both sides, further include two right
The voice coil for being distributed in vibrating diaphragm both sides, one end of each voice coil is claimed to be connected on vibrating diaphragm, the magnetic of the other end and corresponding magnetic circuit system
Clearance fit is together；
Each magnetic circuit system is including yoke and the magnet being arranged in yoke；The yoke includes bottom, with
And it is formed in the side of sidewall portion of bottom surrounding position；The distribution of magnets is enclosed in the surrounding position of bottom, and with corresponding side of sidewall portion
At the magnetic gap of magnetic circuit system.
Optionally, the side of sidewall portion is formed in the marginal position of bottom.
Optionally, it is formed with hollow out in the central area of the yoke bottom；The side of sidewall portion is formed in the side wall of hollow out
Position.
Optionally, the shell has hollow cavity, is formed in the inner walls for installing magnetic circuit system
End face.
Optionally, it is additionally provided with washer on the end face of each magnet.
Optionally, the washer is molded together with shell, and the washer exposes from shell；The magnet is mounted on
On washer.
Optionally, the shell includes the first shell for being symmetrically distributed in vibrating diaphragm both sides, second shell, the vibrating diaphragm clamping
Between first shell, second shell；And two magnetic circuit systems are separately positioned on first shell, in second shell.
Optionally, the vibrating diaphragm is plane vibrating diaphragm.
Optionally, it is provided with top dome on the vibrating diaphragm.
Optionally, there are two the top dome settings, the both sides of vibrating diaphragm are mounted on.
The sound-producing device of the utility model, the magnetic circuit system for being symmetrically distributed in vibrating diaphragm both sides as a result of two, no matter
When towards which side larger displacement occurs for vibrating diaphragm, always there is the voice coil of side that can be deep into the magnetic gap of magnetic circuit system；
That is, even if larger displacement occurs for vibrating diaphragm, voice coil can still coordinate with the higher region of magnetic density in magnetic circuit system
Together, so as to substantially reducing the low-frequency distortion of generating means.
And the yoke in magnetic circuit system is integrated, and simplifies the assembly of component, and improve the intensity of structure.
By referring to the drawings to the detailed description of the exemplary embodiment of the utility model, the utility model it is other
Feature and its advantage will become apparent.
Description of the drawings
The attached drawing of a part for constitution instruction describes the embodiments of the present invention, and uses together with the description
In explanation the principles of the present invention.
Fig. 1 is the sectional view of the utility model sound-producing device.
Fig. 2 is the part-structure explosive view of the utility model sound-producing device.
Fig. 3 is the first implementation structural schematic diagram of the utility model magnetic circuit system.
Fig. 4 is second of implementation structural schematic diagram of the utility model magnetic circuit system.
Fig. 5 is another sectional view for implementing structure of the utility model sound-producing device.
Fig. 6 is the structural schematic diagram of the utility model washer and shell.
Fig. 7 is the third implementation structural schematic diagram of the utility model magnetic circuit system.
Fig. 8 is the exploded perspective view of the utility model voice coil and vibrating diaphragm.
Fig. 9, Figure 10 are two different implementation schematic diagrames of vibrating diaphragm and magnetic circuit component matching.
Specific implementation mode
The various exemplary embodiments of the utility model are described in detail now with reference to attached drawing.It should be noted that：Unless another
It illustrates outside, the component and the positioned opposite of step, numerical expression and numerical value otherwise illustrated in these embodiments is unlimited
The scope of the utility model processed.
It is illustrative to the description only actually of at least one exemplary embodiment below, is never used as to this practicality
Novel and its application or any restrictions used.
Technology and equipment known to person of ordinary skill in the relevant may be not discussed in detail, but in appropriate situation
Under, the technology and equipment should be considered as part of specification.
In shown here and discussion all examples, any occurrence should be construed as merely illustrative, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it need not be further discussed in subsequent attached drawing in a attached drawing.
The utility model provides a kind of sound-producing device comprising shell, vibrating diaphragm and two are symmetricly set on vibrating diaphragm two
The magnetic circuit system of side.
Vibrating diaphragm can be installed in the housing, and magnetic circuit system is distributed in the opposite sides of vibrating diaphragm so that two magnetic circuit system phases
It is symmetrical for vibrating diaphragm.It is also respectively provided with a voice coil in the both sides of vibrating diaphragm, one end of each voice coil is connected on vibrating diaphragm, the other end
It is combined together with the magnetic circuit system of the side.After two voice coils are passed through alternating current, two voice coils respectively with respective magnetic circuit system
It is under unified central planning to be combined, to drive vibrating diaphragm sounding jointly.
The sound-producing device of the utility model can be receiver, loud speaker or well-known to those skilled in the art
Other sound-producing devices.The sound-producing device can be applied in electronic equipment, such as mobile phone, computer, IPAD, player etc..For this purpose,
The utility model additionally provides a kind of electronic equipment comprising above-mentioned sound-producing device.
The sound-producing device of the utility model, the magnetic circuit system for being symmetrically distributed in vibrating diaphragm both sides as a result of two, no matter
When towards which side larger displacement occurs for vibrating diaphragm, always there is the voice coil of side that can be deep into the magnetic gap of magnetic circuit system；
That is, even if larger displacement occurs for vibrating diaphragm, voice coil can still coordinate with the higher region of magnetic density in magnetic circuit system
Together, so as to substantially reducing the low-frequency distortion of generating means.
Bl (x) curves, kms (x) curves and Rms (v) curves for measuring significant design amount inside sound-producing device, are with vibrating diaphragm
Displacement x and its derivative, that is, speed v be variable, so needing approximately to indicate THD with displacement x.
It is remoter apart from magnetic gap center when voice coil moves in magnetic gap for magnetic circuit system, magnetic field intensity B
Smaller, Bl values are smaller.Therefore Bl (x) curves of the magnetic circuit component in sound-producing device are nonlinear.
In addition, when voice coil is when equilibrium displacement moves, displacement x is smaller, and restoring force is mainly provided by ring deformation, replys
Power is smaller；When voice coil displacement x is bigger, ring deformation is bigger, and material the more stretches the more big, and restoring force is bigger, therefore, stiffness factor
K=f/x increases as displacement x increases, i.e. Kms (x) is a nonlinear curve.
Furthermore the mechanical damping Rms (v) of sound-producing device vibrational system changes with the difference of diaphragm oscillations speed, shakes
Film vibration velocity v is the first derivative of displacement x.Therefore mechanical damping Rms (v) is a nonlinear curve
When sound-producing device is in low frequency, amplitude x is larger, and speed v is smaller, and damping force Rms (v) v of sound-producing device are negligible,
Restoring force reaches maximum value.At this point, driving force Bl (x) i and restoring force Kms (x) x are the major influence factors of low-frequency harmonics distortion,
In the case of not considering that vibrating diaphragm generates diaphagras or polarization, the vibrational system of loud speaker can be reduced to shaking for a particle
Dynamic, the resultant force being subject to is：F (x)=Bl (x) i-Kms (x) x.
When in low frequency omega, displacement x is relatively large, and F (x) does not deviate F (x)=- ω with becoming larger for displacement x2X's
Linear relationship will reduce the distortion of sound-producing device.
The sound-producing device of the present invention, since magnetic circuit component is two magnetic circuit systems for being symmetricly set on vibrating diaphragm both sides, this is just
So that Bl (x) curves that the magnetic circuit component provides relative to displacement X origins are symmetrical, and by adjust voice coil length and with
The size of its magnetic gap coordinated so that BL (X) is flat straight line, or is gradually bent up with the increase of displacement X
Bent curve.
This allows for relatively easily selecting corresponding vibrating diaphragm to be combined together with magnetic circuit component, and the two is made jointly
With so as to reduce sound-producing device low-frequency harmonics distortion.
With reference to figure 9, such as when the BL (X) of magnetic circuit component is the curve being gradually bent upwards with the increase of displacement X,
Plane vibrating diaphragm can be then selected, Kms (x) curves of plane vibrating diaphragm itself are exactly gradually upward with the increase of displacement X
Bending.The two is combined together, so that F (x)=Bl (x) i-Kms (x) x can be without departing from F (x)=- ω2X's is linear
Relationship.
With reference to figure 10, and when the BL of magnetic circuit component (X) is flat straight line, then can select with flat Kms (x)
Vibrating diaphragm, such as the design to vibrating diaphragm ring shape, decorative pattern shape can be passed through so that the Kms (x) of vibrating diaphragm is flat straight line.This
Kind magnetic circuit component is combined together with vibrating diaphragm so that F (x)=Bl (x) i-Kms (x) x can be without departing from F (x)=- ω2The line of x
Sexual intercourse.
In resonant frequency f0Near, the work characteristics of sound-producing device is：The vibration velocity of vibrating diaphragm is maximum, equilbrium position (x=
0) restoring force at place is zero (i.e. Kms (x) x=0), and driving force Bl (x) i and damping force Rms (v) dx/dt are main shadow at this time
The factor of sound.Therefore, using the magnetic circuit component of symmetrical structure so that BL (X) symmetrically, at this time when displacement X is located at equilbrium position, drives
Power reaches maximum, driving force and damping force best match, therefore can significantly reduce sound-producing device resonant frequency f0Neighbouring
THD。
Fig. 1, Fig. 2 shows be the utility model sound-producing device a kind of specific implementation structure.In this embodiment, shell
First shell 1a, second shell 1b of the body 1 including being symmetrically distributed in 4 both sides of vibrating diaphragm, and the knot of first shell 1a, second shell 1b
Structure is identical, is symmetrically distributed in the both sides of vibrating diaphragm 4.With reference to the direction shown in figure 1, vibrating diaphragm 4 is clamped in first shell 1a and second
Between shell 1b, to realize fixation of the vibrating diaphragm 4 on shell.Wherein, first shell 1a is distributed in the lower section of vibrating diaphragm 4, second shell
Body 1b is distributed in the top of vibrating diaphragm 4.
Two magnetic circuit systems are denoted as opposite the first magnetic circuit 2 on first shell 1a respectively, and are mounted on relatively
The second magnetic circuit 3 on second shell 1b, and the structure of two magnetic circuit systems is identical, is symmetrically distributed in the both sides up and down of vibrating diaphragm 4.
The both sides of vibrating diaphragm 4 are respectively arranged with a voice coil 5, and one end of voice coil 5 is connected on vibrating diaphragm 4, the other end then with corresponding magnetic circuit system
The magnetic gap of system is combined together.Two voice coils 5 are combined together with the first magnetic circuit 2, the second magnetic circuit 3, to drive
4 vibration sounding of dynamic vibrating diaphragm.
The magnetic circuit system of the utility model can be single magnetic structure, can also be double magnetic circuit or those skilled in the art
Known other magnetic structures.It includes yoke and the magnet that is arranged in yoke, and washer is additionally provided on magnet.Magnetic
The structure on road is different, then magnet and the distribution mode of yoke are also different, this is depending on actual demand.
Since the structure of the first magnetic circuit 2, the second magnetic circuit 3 is identical, now by taking the first magnetic circuit 2 as an example, to the magnetic of the utility model
Road system is described in detail.In one specific embodiment of the utility model, magnetic circuit system can be single magnetic circuit knot
Structure, with reference to figure 1, Fig. 3, there are four the yoke 20 in the first magnetic circuit 2 can be arranged, which is mounted on first
After on shell 1a, a hollow rectangular configuration is surrounded jointly.
First magnetic circuit 2 further includes the magnet 21 being correspondingly arranged in yoke 20, and the washer 22 being arranged on magnet 21.
The magnetic gap 23 of magnetic circuit system is constituted between magnet 21 and the opposite two side walls of yoke 20.When installation, voice coil 5
One end is connected on vibrating diaphragm 4, and the other end stretches into the magnetic gap 23 of the magnetic circuit system.
In the utility model another specific embodiment, there are one the yoke 20 in the first magnetic circuit 2 can be arranged,
With reference to figure 4.Yoke 20 includes bottom 20a, and is formed in the side of sidewall portion 20b of bottom 20a surroundings position.Four side of sidewall portion
20b for example may be formed at four fringe regions of bottom 20a.There are four magnet 21 is correspondingly arranged, it is respectively distributed to bottom 20a's
Surrounding position, and each magnet 21 defines the magnetic gap 23 of magnetic circuit system with corresponding side of sidewall portion 20b.Certainly, magnet 21
Eight can be provided with, each two magnet 21 corresponds to a side of sidewall portion 20b.
Preferably, it is formed with hollow out in the central area of yoke bottom 20a, makes its structure annular in shape；Side of sidewall portion 20b shapes
At the marginal position in hollow out.
In the utility model another specific embodiment, magnetic circuit system can be two magnetic route structure, as follows：First
Yoke 20 in magnetic circuit 2 is in tabular, further includes the centring magnet 26 being arranged in 20 central region of yoke, which can
, in the central area of yoke 20, center washer 27 can be also bonded on the end face of centring magnet 26 by glue sticking.First
Magnetic circuit 2 further includes the side magnet 24 for surrounding the setting of centring magnet 26.There are four the settings of side magnet 24, is mounted in yoke 20 in
On the opposite position of 26 4 side walls of heart magnet；And in each washer 25 when being additionally provided on the end face of magnet 24.Side magnet
The magnetic gap of the first magnetic circuit 2 is constituted between 24 and the side wall of centring magnet 26.
First magnetic circuit 2 is mounted on first shell 1a, and the second magnetic circuit 3 is mounted on second shell 1b.Specifically, first shell
Body 1a, second shell 1b have hollow inner cavity, are provided on the inner wall of two shells for installing respective magnetic circuit system
End face.The location and installation of magnetic circuit system is realized by the end face.
In one preferred embodiment of the utility model, the washer in magnetic circuit system can be moulded in one with shell
It rises, and the washer exposes from shell；The structures such as the magnet in magnetic circuit system can be with location and installation on the washer.
The magnetic yoke structure of one shown in four independent magnetic yoke structures or Fig. 4 either shown in Fig. 3, magnet
Four washers 22 above can be independent from each other, and can also be integrated.In one preferred embodiment party of the utility model
In formula, washer 22 is integrated, and annular in shape, which is incorporated in by way of injection molding on the inner wall of first shell 2, is made
Positioning surface and mounting surface that the washer 22 can be installed as the first magnetic circuit 2 are obtained, to realize the location and installation of the first magnetic circuit 2.
When magnetic circuit system is using in above-mentioned two magnetic route structure, then it can be side washer 25 to be molded with shell together,
The side washer 25 can be integrated, annularly, no longer illustrate herein.
Traditional diaphragm structure may be used in the vibrating diaphragm 4 of the utility model, such as may include shaking positioned at central region
Dynamic portion, is used to connect the interconnecting piece of shell, and the ring portion between interconnecting piece and vibration section, this vibrating diaphragm positioned at edge
Structure belong to the common knowledge of those skilled in the art, no longer illustrate herein.It is preferred real in the utility model one
It applies in mode, the vibrating diaphragm 4 of the utility model is plane vibrating diaphragm.The vibrating diaphragm of flatness can preferably inhibit the polarization of vibrating diaphragm.
Preferably, top dome 6 is provided on vibrating diaphragm 4.Wherein, in order to ensure that the symmetry of sound-producing device, top dome 6 can be set
There are two setting, it is covered in the opposite sides of vibrating diaphragm 4 respectively, with reference to figure 1.
In one preferred embodiment of the utility model, with reference to figure 8, the central area of vibrating diaphragm 4 is provided with hollow out
40, there are one the settings of top dome 6, is the FPCB plates for being covered in 4 void region of vibrating diaphragm.That is, FPCB plates itself can be used as
The roof structure of vibrating diaphragm 4 can be covered in the upper surface of vibrating diaphragm 4, can also be covered in the lower surface of vibrating diaphragm 4, by vibrating diaphragm 4
The hollow out 40 of central area covers.The FPCB plates can also play conducting while playing the role of top dome, so as to
In the transmission of sound-producing device internal circuit signal.
Wherein, the lead positioned at the voice coil of 4 both sides of vibrating diaphragm is connected on the FPCB plates.Specifically, two voice coils can
It is denoted as the first voice coil 51 positioned at 4 lower section of vibrating diaphragm, and the second voice coil 50 above vibrating diaphragm 4 respectively, with reference to figure 8.When
After one voice coil 51, the second voice coil 50 are mounted on the both sides of vibrating diaphragm 4, the lead 51a on the first voice coil 51 can be by welding
It is connected on FPCB plates, another lead 51b back-flexings take the shape of the letter U, and are stretched out from shell.Lead 50a on second voice coil 50
It can by welding be connected on FPCB plates, another lead 50b back-flexings take the shape of the letter U, and are stretched out from shell.
Wherein, lead 51a is from the extraction location on the first voice coil 51, with lead 50a from the extraction position on the second voice coil 50
It sets relative to FPCB plate central symmetries.With reference to the view direction of figure 8, lead 51a is drawn from the lower right corner of the first voice coil 51, and is drawn
Line 50a is drawn from the upper left corner of the second voice coil 50.First voice coil 51, the second voice coil 50 another lead then can also be relative to
FPCB plate central symmetries, no longer illustrate herein.Using such structure design so that can ensure two voice coil structures pair
Claim distribution, with the generation for inhibiting vibrating diaphragm to polarize as possible.
Although some specific embodiments of the utility model are described in detail by example, this field
It is to be understood by the skilled artisans that above example merely to illustrate, rather than in order to limit the scope of the utility model.This
Field it is to be understood by the skilled artisans that can not depart from the scope of the utility model and spirit in the case of, to above example
It modifies.The scope of the utility model is defined by the following claims.
Claims (10)
1. a kind of sound-producing device, it is characterised in that：Including shell, the vibrating diaphragm being arranged in shell and magnetic circuit component, the magnetic
Road component includes two magnetic circuit systems for being symmetricly set on vibrating diaphragm both sides, further includes two sounds for being symmetrically distributed in vibrating diaphragm both sides
Circle, one end of each voice coil are connected on vibrating diaphragm, and the other end is combined together with the magnetic gap of corresponding magnetic circuit system；
Each magnetic circuit system is including yoke and the magnet being arranged in yoke；The yoke includes bottom, and is formed in
The side of sidewall portion of bottom surrounding position；The distribution of magnets defines magnetic circuit in the surrounding position of bottom, and with corresponding side of sidewall portion
The magnetic gap of system.
2. sound-producing device according to claim 1, it is characterised in that：The side of sidewall portion is formed in the marginal position of bottom.
3. sound-producing device according to claim 1, it is characterised in that：It is formed with and engraves in the central area of the yoke bottom
It is empty；The side of sidewall portion is formed in the sidewall locations of hollow out.
4. sound-producing device according to claim 1, it is characterised in that：The shell has hollow cavity, in the shell
The end face for installing magnetic circuit system is formed on inner wall.
5. sound-producing device according to claim 1, it is characterised in that：It is additionally provided with washer on the end face of each magnet.
6. sound-producing device according to claim 5, it is characterised in that：The washer is molded together with shell, and described
Washer exposes from shell；The magnet is mounted on washer.
7. sound-producing device according to claim 1, it is characterised in that：The shell includes being symmetrically distributed in vibrating diaphragm both sides
First shell, second shell, the vibrating diaphragm are clamped between first shell, second shell；And two magnetic circuit systems are respectively set
In first shell, second shell.
8. sound-producing device according to claim 1, it is characterised in that：The vibrating diaphragm is plane vibrating diaphragm.
9. sound-producing device according to claim 8, it is characterised in that：It is provided with top dome on the vibrating diaphragm.
10. sound-producing device according to claim 9, it is characterised in that：There are two the top dome settings, is mounted on vibrating diaphragm
Both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721479329.6U CN207638872U (en) | 2017-11-08 | 2017-11-08 | A kind of sound-producing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721479329.6U CN207638872U (en) | 2017-11-08 | 2017-11-08 | A kind of sound-producing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207638872U true CN207638872U (en) | 2018-07-20 |
Family
ID=62856251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721479329.6U Active CN207638872U (en) | 2017-11-08 | 2017-11-08 | A kind of sound-producing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207638872U (en) |
-
2017
- 2017-11-08 CN CN201721479329.6U patent/CN207638872U/en active Active
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