CN110049416A - Vibration-sound generating device and electronic product - Google Patents
Vibration-sound generating device and electronic product Download PDFInfo
- Publication number
- CN110049416A CN110049416A CN201910330100.3A CN201910330100A CN110049416A CN 110049416 A CN110049416 A CN 110049416A CN 201910330100 A CN201910330100 A CN 201910330100A CN 110049416 A CN110049416 A CN 110049416A
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- Prior art keywords
- vibration
- shell
- magnetic
- driving
- permanent magnet
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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
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2400/00—Loudspeakers
- H04R2400/11—Aspects regarding the frame of loudspeaker transducers
Abstract
The invention discloses a kind of vibration-sound generating device and electronic products.The device includes screen, fixing piece and driving assembly；The screen is configured to vibrate relative to the fixing piece；The driving component includes at least one coil, the floating permanent magnet of at least one magnetic and at least one piece of driving magnet, the coil, the magnetic float permanent magnet and are fixedly connected with the fixing piece, the driving magnet is fixedly connected with the screen, and the magnetic floats and forms repulsion between permanent magnet and the driving magnet；The coil passes through the magnetic field that the driving magnet generates.
Description
Technical field
The present invention relates to electroacoustic switch technology fields, more particularly, to a kind of vibration-sound generating device and electronic product.
Background technique
Sounding device is electroacoustic transduction element important in electronic product, for current signal to be converted into sound.In recent years
Carry out the fast development with electronic product, is also improved accordingly applied to the sounding device on electronic product.
It is traditionally used for the principle that the sounding device of earpiece uses and pushes air vibration sounding for vibrating diaphragm.In the recent period, with
Comprehensively screen become mobile phone the main direction of development, how screen without aperture design under realize handset function, be provided simultaneously with more
Good sense of hearing experience, is the technical problem currently faced.In this regard, those skilled in the art develop using screen vibration sounding
Technical solution.
A kind of technical solution that those skilled in the art use is as shown in Figure 1, the technical solution uses an electromagnet 02
The structure distribution mode staggered relatively with a magnet 03, by opening, closing electromagnet 02, or the magnetic of switching electromagnet 02
Pole, so that generating the absorption of variation, repulsive interaction between electromagnet 02 and magnet 03.Magnet 03 is fixed on mobile phone screen 01 again
On, electromagnet 02 is fixed on component motionless in mobile phone, so as to make mobile phone screen 01 generate vibration.
In this technical solution, it is assumed that vertical direction displacement is x, is attraction between two magnets, the first magnet and the
There is one between two magnets and is displaced relevant directed force F (x).The restoring force of screen stiffness by itself is F (kmsx), is existed at this time
The state of dynamic balanceAfter the coil of its electromagnet 02 is powered, the magnetic field between two magnet is disturbed, therefore
Active force between electromagnet 02 and magnet 03 is broken balance, such as: due to the magnetic field in the same direction of intensifying current suction, two
A magnet has a trend close to each other, while screen has in reversed a restoring force and motion process one
Damping force, therefore the equation of motion is:
Wherein B is equivalent magnetic induction intensity, and H is Equivalent Magnetic Field intensity, the equivalent face that S interacts between two permanent magnets
Product.
But this technical solution equally exists the larger problem of occupied space, is unfavorable for the lightening structure of mobile phone and sets
Meter.Under the premise of in order to make mobile phone screen 01 generate sufficiently large amplitude, need to reserve enough spaces between two magnet,
Otherwise it will cause and collide between magnet and electromagnet 02, seriously affect the acoustical behavior of screen sounding.For this purpose, will necessarily be
The thickness direction of mobile phone occupies more spaces.
In addition, magnet can generate suction to metal shell or magnetic part, performance is influenced.
Summary of the invention
It is an object of the present invention to provide a kind of new solutions of vibration-sound generating device.
According to the first aspect of the invention, a kind of vibration-sound generating device is provided.The device includes
Including shell, fixing piece and driving assembly；
At least part of the shell is configured to vibrate relative to the fixing piece；
The driving component includes at least one coil, the floating permanent magnet of at least one magnetic and at least one piece of driving magnet, institute
The floating permanent magnet of coil, the magnetic to be stated to be fixedly connected with the fixing piece, the driving magnet is fixedly connected with the shell, or
Coil described in person, the magnetic float permanent magnet and are fixedly connected with the shell, the driving magnet and the fixed company of the fixing piece
It connects, the magnetic floats and forms repulsion between permanent magnet and the driving magnet；
The coil is located at the side of the driving magnet, and the coil passes through the magnetic field that the driving magnet generates.
It optionally, further include lower casing, the coil and the magnetic float permanent magnet and is fixedly connected on the lower casing, under described
Shell is fixedly connected with the fixing piece.
Optionally, the driving magnet uses halbach magnets.
Optionally, the halbach magnets are at least two groups, and gap, institute are formed between two adjacent groups halbach magnets
The magnetic field-enhanced region that gap is the halbach magnets is stated, the coil is located in the gap, and the routing region is worn
Cross the magnetic field that the halbach magnets generate.
Optionally, the driving component further includes protective shell, and the driving magnet passes through the protective shell and the shell
For vibration part be fixedly connected.
Optionally, the protective shell includes side, the halbach magnets described in two group adjacent with the side it is remote
The side for sowing discord gap is provided with magnetic conductive board.
Optionally, every group of halbach magnets include three pieces of permanent magnets along direction of vibration arrangement, the permanent magnetism positioned at both ends
The magnetizing direction of body is perpendicular to direction of vibration, and magnetizing direction is on the contrary, the magnetizing direction for being located at the permanent magnet at middle part is parallel to vibration
Dynamic direction；The magnetizing direction of the permanent magnet at the both ends positioned at direction of vibration of two adjacent groups halbach magnets is identical, is located at
The magnetizing direction of the permanent magnet in portion is opposite.
Optionally, the centre of the coil has through-hole, is the routing region of coil, the cabling area around the through-hole
Domain includes that the first routing region of one section of part for vibration close to the shell and one section are used for far from the shell
The direction of routing of second routing region of the part of vibration, first routing region and the second routing region is parallel to described outer
The surface of the part for vibration of shell；
Two adjacent groups halbach magnets form magnetic between the permanent magnet of the part for vibration of the shell
, first routing region passes through the magnetic field；Two adjacent groups halbach magnets far from the shell for vibration
Magnetic field is formed between partial permanent magnet, second routing region passes through the magnetic field.
Optionally, the driving component is configured to correspond to coil two pieces of driving magnets of setting, in two pieces of institutes
It states and forms the gap between driving magnet, two annular end faces of the coil are respectively facing two pieces of driving magnets, and two
Magnetic field is formed between driving magnet described in block.
Optionally, the pole orientation of one of driving magnet are as follows: N is extremely close to the portion for vibration of the shell
Point, the extremely part for vibration far from the shell S；
The pole orientation of another piece of driving magnet are as follows: the N extremely part for vibration far from the shell, S are leaned on pole
The part for vibration of the nearly shell；
The routing region include one section close to the shell for the first routing region of the part of vibration and one section
Second routing region of the part for vibration far from the shell, first routing region and the second routing region are walked
Line is oriented parallel to the surface of the part for vibration of the shell；
Magnetic field is formed between the magnetic pole of the part for vibration of the close shell of two pieces of driving magnets, it is described
First routing region passes through the magnetic field；The magnetic pole of the part for vibration far from the shell of two pieces of driving magnets it
Between form magnetic field, second routing region passes through the magnetic field.
Optionally, the middle part of the lower casing forms bulge-structure, and the coil is fixed on the bulge-structure, described
Magnetic floats at least side that permanent magnet is set to the bulge-structure, and the halbach magnets are opposite with the floating permanent magnet of magnetic described in two groups
Setting；Or
The lower casing is that the floating permanent magnet of magnetic described in laminated structure is arranged on the lower casing, and the coil is arranged on institute
Magnetic is stated to float on permanent magnet.
It optionally, is permeability magnetic material in the lower casing.
Optionally, the part for vibration of the shell is screen or the rear cover opposite with the screen.
According to another aspect of the present invention, a kind of electronic product is provided.The product includes: above-mentioned vibration sounding dress
It sets；
Product main body, the fixing piece are a part of structure of the product main body, and the driving component is arranged described
In product main body.
Optionally, the fixing piece is center, PCB or the side wall of the product main body.
According to one embodiment of the disclosure, the vibration-sound generating device it is functional.
By referring to the drawings to the detailed description of exemplary embodiment of the present invention, other feature of the invention and its
Advantage will become apparent.
Detailed description of the invention
It is combined in the description and the attached drawing for constituting part of specification shows the embodiment of the present invention, and even
With its explanation together principle for explaining the present invention.
Fig. 1 is a kind of side sectional view of screen vocal skill scheme in the prior art.
Fig. 2 is the explosive view of the driving assembly of vibration-sound generating device provided by the invention.
Fig. 3 is a kind of side sectional view of vibration-sound generating device provided by the invention.
Fig. 4 is the side cross sectional views of another vibration-sound generating device provided by the invention
Fig. 5 is a kind of side sectional view of another angle of vibration-sound generating device provided by the invention.
Fig. 6 is the shaft side figure of the vibration-sound generating device of not set protection cap provided by the invention.
Fig. 7 is a kind of side sectional view of electronic product provided by the invention.
Fig. 8 is a kind of partial enlarged view of electronic product provided by the invention.
Fig. 9 is the partial enlarged view of another electronic product provided by the invention.
Specific embodiment
Carry out the various exemplary embodiments of detailed description of the present invention now with reference to attached drawing.It should also be noted that unless in addition having
Body explanation, the unlimited system of component and the positioned opposite of step, numerical expression and the numerical value otherwise illustrated in these embodiments is originally
The range of invention.
Be to the description only actually of at least one exemplary embodiment below it is illustrative, never as to the present invention
And its application or any restrictions used.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable
In the case of, the technology, method and apparatus should be considered as part of specification.
It is shown here and discuss all examples in, any occurrence should be construed as merely illustratively, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, then in subsequent attached drawing does not need that it is further discussed.
The present invention provides a kind of vibration-sound generating devices.The sounding device includes vibration component and driving assembly.Such as Fig. 2,3
Shown, the vibration component includes shell and fixing piece.At least part of the shell is configured to relative to the fixation
Part vibration.The shell has sufficiently large vibration area.For example, shell for vibration part for screen 20 or with institute
State the opposite rear cover 22 of screen 20.It is illustrated by taking screen 20 as an example below.The fixing piece can be the sounding device and be answered
A certain fixation member in electronic product, is also possible to the part of fixation being separately configured.
As Figure 8-9, the driving component includes that at least one coil 16, at least one magnetic float permanent magnet 17 and at least
One piece of driving magnet.As shown in figure 5, the coil 16 is by conducting wire coiling structure in a closed ring shape in one direction.The line
The centre of circle 16 has through-hole.It is the routing region of coil 16 around the through-hole.The routing region refers in coil 16
The region that is actually passed through of lead, entire routing region is annular in shape.
The coil 16, the magnetic float permanent magnet 17 and are fixedly connected with the fixing piece.For example, coil 16, the magnetic
Floating permanent magnet 17 is directly fixedly connected with fixing piece, or indirectly solid by other components (for example, lower casing) and fixing piece
Fixed connection.The driving magnet is fixed in the protective shell 11.Driving assembly further includes protective shell 11.Preferably, the guarantor
Protective case 11 is permeability magnetic material, for example, mild steel, SPCC etc..The protective shell 11 of permeability magnetic material can efficiently reduce leakage field.The guarantor
Protective case 11 is fixedly connected with the screen 20.The magnetic floats and forms repulsion between permanent magnet 17 and the driving magnet.
Coil 16 during the energization, can constantly generate heat.If coil 16 is fixedly connected with screen 20, heat is easy
Screen 20 is caused to damage.In this example embodiment, coil 16 is fixedly connected with fixing piece rather than connect with screen 20, can be effectively
The fever of coil 16 is avoided to cause to damage to screen 20.In other examples, the halbach magnets and the fixing piece are solid
Fixed connection, the coil are fixedly connected with the shell.
There is axis, in embodiments of the present invention, the axis of the coil 16 in the coil 16 itself of closed circular
It is parallel to the surface of the screen 20, as shown in figure 8,16 place plane of the coil and the screen vertical.As shown in figure 3,
The protective shell 11 has open end 23.The coil 16 protrudes into the protective shell 11 from the open end 23, so that
The coil is then located at the side of the driving magnet, and the annular end face of coil 16 is towards the driving magnet, the axis of coil 16
The surface of line and screen 20 is horizontal attitude.
The routing region of the coil 16 includes the first routing region 16a close to the screen 20, and far from institute
State the second routing region 16b of screen 20.The direction of routing of the first routing region 16a and the second routing region 16b are parallel
In the surface of the screen 20, in this example embodiment, coil 16 is along the paper form with outside cabling inwards.The driving magnet
Can generate magnetic field, above-mentioned first routing region 16a and the second routing region 16b at least one to pass through the driving magnetic
The magnetic field that body generates.In this way, can be generated between coil 16 and driving magnet after being passed through the current signal of alternation in coil 16
Ampere force.The routing region of energization passes through magnetic field, can generate Ampere force.Since the side of the driving magnet is arranged in coil 16
Portion, therefore a part of magnetic field that driving magnet generates can pass through coil 16 with the direction for being parallel to the surface of screen 20, in turn
Direction is generated perpendicular to the Ampere force on the surface of the screen 20.
Since coil 16 and driving magnet are separately positioned on fixing piece and screen 20, and the electric current letter being passed through in coil 16
It number is the signal of alternation, therefore the direction of generated Ampere force is also alternately inverted variation.Ampere force can pass through driving
Component is directly delivered on screen 20.Protective shell 11 is by can directly drive screen 20 after Ampere force.Above-mentioned Ampere force can make
Relative displacement is generated between screen 20 and fixing piece, and then makes screen 20 relative to fixing piece vibration sounding.
Vibration-sound generating device provided by the invention compared with the existing technology, on the one hand can directly drive at least office of shell
Portion (for example, screen 20 or rear cover 22) case vibration.
On the other hand, at least local (for example, the screen 20 or rear cover 22) shell that can preferably protect shell, reduces outer
The impaired risk of shell.By taking embodiment shown in Fig. 8 as an example, coil 16 and driving magnet are respectively arranged at fixing piece and shell
On, directly externally hull shape ensure that efficient vibration transmission efficiency at driving.Driving assembly and vibration component are directly connected to
Direct drive mode simplifies the principle of driving case vibration, and shell can directly generate vibration after by Ampere force.It is this
Design method effectively increases vibration transformation efficiency, drives case vibration without causing resonance by oscillator vibration.This sets
Meter, can be according to shell amplitude so that the amplitude that can be generated of shell and the amplitude that driving assembly can be generated are almost the same
Performance requirement designs the space for keeping for driving assembly.Without the vibration for the reserved significantly greater than shell peak swing of driving assembly
Space.
On the other hand, magnetic floats and forms repulsion between permanent magnet 17 and driving magnet, and magnetic, which floats permanent magnet 17, can generate centering
Damping prevents driving magnet vibration offset, and improves transient response.After a loss of power, driving magnet floats permanent magnet 17 in magnetic
Repulsion effect under, can stop rapidly vibrating.
On the other hand, magnetic floats permanent magnet 17 and plays buffer function, the impact force that bumper housings are subject to, to prevent shell quilt
The Ampere force of frequent changes damages.
On the other hand, it in vibration-sound generating device provided by the invention, does not need to set between protective shell 11 and fixing piece
Elastic slice is set, material utilization amount is saved.
Preferably, as shown in figure 8, the driving component, which is configured to correspond to a coil 16, is arranged two pieces of driving magnets 25
Form.Two pieces of driving magnets 25 are located at the two sides of the coil 16, the line along the axis direction of the coil 16
Circle 16 is clipped between two pieces of driving magnets 25, and two annular end faces of the coil 16 are respectively facing two blocks of driving magnetic
Body 25.Magnetic field, the first routing region 16a and the second routing region 16b of coil 16 are formed between two pieces of driving magnets 25
Above-mentioned magnetic field can be passed through, to generate Ampere force between driving magnet 25 and coil 16.It is produced using two pieces of driving magnets 25
Raw magnetic field stability, symmetry, magnetic field strength are more preferable, so that the Ampere force generated between coil 16 and driving magnet 25 is more
By force, the problems such as direction of Ampere force is less prone to inclination, so that the vibrating effect of screen 20 is more stable.Moreover, passing through setting two
Block driving magnet 25, the magnetic field formed between two pieces of driving magnets 25 is relative to one piece of driving magnet 25 close to 16 side of coil
The magnetic field of formation is more concentrated, magnetic field strength is stronger, the magnetic field that the driving magnet 25 of effective use generates.
Preferably, as in Figure 2-4, driving magnet uses halbach magnets.Halbach magnets include muti-piece permanent magnetism
Body, muti-piece permanent magnet are arranged in the form of an array, to form magnetic field-enhanced region in setting position.For example, magnetic field-enhanced region position
In magnetizing direction perpendicular to the side of the permanent magnet of direction of vibration.Halbach magnets make Ampere force bigger.For example, Haier shellfish
Gram magnet is one group.Direction of vibration is vertical direction, then the permanent magnet to magnetize in the level of this group of halbach magnets is opposite
Two sides form magnetic field-enhanced region.Coil 16 is one, and is located at the side of halbach magnets；Either coil 16 is two
It is a, and it is located at the two sides of halbach magnets.
In one example, halbach magnets 10 are at least two groups.For example, it may be 2 groups, 3 groups, 4 groups etc..Every group of sea
You arrange Bake magnet along direction of vibration.Gap 24 is formed between the halbach magnets of two adjacent groups.In each gap 24
It is provided with a coil 16.When coil 16 is multiple, the driving force of driving assembly is bigger.The gap 24 is the Haier shellfish
The magnetic field-enhanced region of gram magnet 10, the coil 16 are located in the gap 24, and the routing region passes through the Haier shellfish
The magnetic field that gram magnet 10 generates.It is along the paper form with outside cabling inwards in embodiment as shown in Figure 3,4.Institute
Magnetic field can be generated by stating halbach magnets 10, above-mentioned first routing region and the second routing region at least one to pass through
The magnetic field that the halbach magnets 10 generate.In this way, after being passed through the current signal of alternation in coil 16, coil 16 and Haier
Ampere force can be generated between Bake magnet 10.The routing region of energization passes through magnetic field, can generate Ampere force.Due to coil 16
In the gap 24 that halbach magnets 10 are formed, therefore, at least part magnetic field that halbach magnets 10 generate can
Coil 16 is passed through to be parallel to the direction on the surface of screen 20, and then generates direction perpendicular to the ampere on the surface of the screen 20
Power.
In this example embodiment, halbach magnets 10 form at least two groups, and the gap 24 between two groups is magnetic field-enhanced region,
Coil 16 is located in gap 24.Magnet is set compared in single group, this setup makes magnetic field stronger, more balanced, coil
16 Ampere forces being subject to bigger, can be balanced more, and the vibration of vibration component is more stable, and more strongly, starting of oscillation speed is faster.
Preferably, as shown in Fig. 2, every group of halbach magnets include three pieces of permanent magnets along direction of vibration arrangement, respectively
It is calculated as the first permanent magnet 13, the second permanent magnet 14 and third permanent magnet 15.Gap 24 is formed between two groups of halbach magnets.Position
In both ends permanent magnet magnetizing direction perpendicular to direction of vibration, and magnetizing direction is opposite；Permanent magnet positioned at middle part magnetizes
It is oriented parallel to direction of vibration.Direction when direction of vibration, that is, vibration component vibration.Two adjacent groups halbach magnets are located at
The magnetizing direction of the permanent magnet at the both ends of direction of vibration is identical, and the magnetizing direction positioned at the permanent magnet at middle part is opposite.
For example, as shown in Figure 3-4, positioned at the first permanent magnet 13a of left bank, (one end far from gap 24 is the pole S, between
One end of gap 24 is the pole N) (one end far from gap 24 is the pole N, close to gap 24 with the third permanent magnet 15a positioned at left bank
One end is the pole S) magnetizing direction perpendicular to direction of vibration, and the magnetizing direction of the two is opposite.Positioned at the first permanent magnetism of left bank
The first permanent magnet 13b body 13a (one end far from gap 24 is the pole S, and one end close to gap 24 is the pole N) and be located at right row
(one end far from gap 24 is the pole N, and one end close to gap 24 is the pole S) is corresponding, and the magnetizing direction of the two is identical.Positioned at a left side
Row the second permanent magnet 14a (close to open end 23 one end be the pole S, far from open end 23 one end be the pole N) be located at right row
The second permanent magnet 14b (close to open end 23 one end be the pole N, far from open end 23 one end be the pole S) it is corresponding, the two
Magnetizing direction is parallel to direction of vibration, and magnetizing direction is opposite.Third permanent magnet 15a positioned at left bank is (far from gap 24
One end is the pole N, and one end close to gap 24 is the pole S) (one end far from gap 24 is S with the third permanent magnet 15b positioned at right row
Pole, one end close to gap 24 are the pole N) it is corresponding, the magnetizing direction of the two is perpendicular to direction of vibration, and magnetizing direction phase
Together.
In this example embodiment, the magnetic field strength in the gap 24 formed between two groups of adjacent halbach magnets is maximum.
The driving force of vibration component is maximum, and starting of oscillation speed is fast.
Certainly, every group of permanent magnet is not limited to 3, can also be more.Every group of halbach magnets are located at both ends
The magnetizing direction of permanent magnet is perpendicular to direction of vibration, and magnetizing direction is opposite；Magnetizing direction positioned at the permanent magnet at middle part is flat
Row is in direction of vibration, and the magnetic field of each permanent magnet is mutually in paramagnetism linking, i.e., the pole N and the pole the S phase of adjacent permanent magnet
It is right.In this way, the magnetic field strength in gap 24 can be bigger.
Certainly, halbach magnets are not limited to the above embodiments, and those skilled in the art can carry out according to actual needs
Selection.
Preferably, the main direction of halbach magnets 10 is parallel to the long side of coil 16.Main direction, that is, Halbach
The extending direction on the longest side of magnet 10.As shown in figure 5, the long side of coil 16 is the longest side of length of coil 16.It is this
The useful effect region of set-up mode, halbach magnets 10 and coil 16 is maximum, and the Ampere force formed therebetween is maximum.
In other examples, halbach magnets 10 are not limited to above structure, and those skilled in the art can be according to reality
It needs to be configured.
Preferably, as in Figure 2-4, the halbach magnets 10 are at least two groups.In the side with the protective shell
The side in the separate gap 24 of two groups of adjacent halbach magnets is provided with magnetic conductive board 12.I.e. outermost two groups of Halbach
The side in the separate gap of magnet is provided with magnetic conductive board 12.Magnetic conductive board 12 is permeability magnetic material, for example, mild steel, SPCC etc..Magnetic conduction
Plate 12 can gather magnetic induction line, reduce the generation of leakage field, further increase the magnetic field strength in gap 24.
Preferably, as shown in Figure 3-4, two adjacent groups halbach magnets close to the screen 20 permanent magnet (for example,
First permanent magnet 13a, 13b) between form magnetic field, first routing region passes through the magnetic field；Two groups of halbach magnets
Magnetic field is formed between permanent magnet (for example, third permanent magnet 15a, 15b) far from the screen 20, second routing region is worn
Cross the magnetic field.In this example embodiment, two routing regions are each passed through the magnetic field of different location.This makes the driving force of vibration component
It significantly improves.
Preferably, as shown in Figure 2-5, driving assembly further includes lower casing 18.The coil 16 is fixed on the lower casing 18
On, the lower casing 18 is fixedly connected with the fixing piece, and one end opposite with the lower casing 18 of the protective shell 11 is unlimited
's.Lower casing 18 can be set according to actual needs biggish connection area, this becomes the connection of driving assembly and fixing piece
It is easy.
Under conditions of the lower casing 18 is permeability magnetic material, the leakage field that magnetic floats permanent magnet 17 can be reduced.However, magnetic conduction material
Material forms magnetostatic field force with halbach magnets 10, and the two attracts each other.This will lead to the close to each other of screen 20 and fixing piece.
The magnetic floats permanent magnet 17 and is arranged on the lower casing 18, and the magnetic floats permanent magnet 17 and repels each other with the driving magnet.Magnetic is floating
Permanent magnet 17 and driving magnet form repulsion, which can balance magnetostatic field force, prevent mutually leaning on for screen 20 and fixing piece
Closely.
Preferably, the middle part of the lower casing 18 forms bulge-structure 19.Bulge-structure 19 is strip projected parts or dotted convex
It rises.The coil 16 is fixed on the bulge-structure 19.For example, coil 16 is fixed on bulge-structure 19 by binder
On.The magnetic floats at least side that permanent magnet 17 is set to the bulge-structure 19, and in the present embodiment, the magnetic floats permanent magnet 17
Including two groups of magnet, two groups of magnet are separately fixed at the two sides of the bulge-structure 19.For example, every group of magnet can only include one
Block magnet is also possible to muti-piece magnet.The halbach magnets 10 are two groups, and are oppositely arranged respectively with two groups of magnet.
In this example embodiment, the magnetizing direction that magnetic floats permanent magnet 17 is filled perpendicular to direction of vibration, and with the permanent magnet close to lower casing 18
Magnetic direction is identical, to form repulsion.
For example, as shown in figure 4, the magnetizing direction for being located at the third permanent magnet 15a of left bank floats permanent magnetism with the magnetic for being located at left side
The magnetizing direction of body 17 is identical, to form repulsion.Positioned at the magnetizing direction of the third permanent magnet 15b of right row and positioned at right side
The magnetizing direction that magnetic floats permanent magnet 17 is identical, to form repulsion.Bulge-structure 19 makes coil 16 and magnetic float permanent magnet 17
It positions more acurrate.The overall volume that the magnetic of split settings floats permanent magnet 17 is smaller, smaller for the interference in magnetic field in gap 24.
It is also possible that as shown in figure 3, the lower casing 18 is laminated structure.The magnetic floats permanent magnet 17 and is structure as a whole.Example
Such as, it is whole laminated structure that magnetic, which floats permanent magnet 17, and magnetizing direction is perpendicular to direction of vibration.The magnetic floats permanent magnet 17 and is set
It sets on the lower casing 18.It is fixed on lower casing 18 for example, magnetic floats permanent magnet 17 by the modes such as bonding, being clamped.The line
Circle 16 is arranged on the magnetic and floats on permanent magnet 17.It is floated on permanent magnet 17 for example, coil 16 is bonded in magnetic by binder.Magnetic is floating
The magnetism at the both ends perpendicular to direction of vibration of permanent magnet 17 is most strong, and the magnetism at both ends is close with corresponding halbach magnets 10
The magnetism of respective end is identical, to form repulsion.For example, as shown in figure 4, being located at the separate gap of the third permanent magnet 15a in left side
24 one end are the pole N, and the left end that magnetic floats permanent magnet 17 is the pole N, to form repulsion.Positioned at right side third permanent magnet 15b it is remote
Sowing discord 24 one end of gap is the pole S, and the right end that magnetic floats permanent magnet 17 is the pole S, to form repulsion.The magnetic of integral structure floats permanent magnet 17
It is easily installed.
Certainly, the set-up mode that magnetic floats permanent magnet 17 is not limited to the above embodiments, and those skilled in the art can be according to reality
Border needs to be configured.
The present invention also provides a kind of electronic products.Electronic product can be, but not limited to, mobile phone, laptop, electricity
Sub- wrist-watch, tablet computer, intercom etc..
As Figure 7-9, which includes vibration-sound generating device provided by the invention and product main body.The screen
Curtain 20 is arranged in the product main body, the display screen as electronic product.The screen 20 can be with the rotatable company in one end
It connects in product main body, the form setting that the other end can move freely；Alternatively, can also be using with favorable elasticity deformability
Material be made screen 20, screen 20 is fixedly connected on the component of other fixations with one end, the other end is can move freely
Form setting.In this way, the screen 20 can generate vibration relative to product main body.A part of structure of the product main body can
Using as the fixing piece, the driving component is then arranged in the product main body.For example, the protective shell 11 and Haier shellfish
On the screen 20, the coil 16 is then fixed at is equivalent to one of fixing piece to the fixed setting of gram magnet 10 in product main body
On component.The Ampere force generated by driving assembly, can drive 20 vibration sounding of screen.Electronic product provided by the invention because
Using vibration-sound generating device provided by the invention, therefore occupied on the thickness direction for being parallel to screen 20 of electronic product
Space is less, is more advantageous to and the thinner of design of electronic products is met to the lightening design requirement of electronic product.
Preferably, the fixing piece can be the structures such as center 21, PCB, the side wall in product main body.In product main body
In, in order to dispose other electronic devices, product main body is often configured with the structure members such as partition, center 21.Center 21 with
The opposite side of screen is provided with rear cover 22.These structure members have good structural stability, a side in electronic product
Face is used for case electronic device, on the other hand for protecting electronic device.Therefore, using this kind of structural member in product main body as
The fixing piece can be improved the conversion ratio that Ampere force is converted to vibration, improve vibration reliability.The side wall of product main body it is interior
Surface can also be used as the fixing piece.
Although some specific embodiments of the invention are described in detail by example, the skill of this field
Art personnel it should be understood that example above merely to being illustrated, the range being not intended to be limiting of the invention.The skill of this field
Art personnel are it should be understood that can without departing from the scope and spirit of the present invention modify to above embodiments.This hair
Bright range is defined by the following claims.
Claims (15)
1. a kind of vibration-sound generating device, which is characterized in that including shell, fixing piece and driving assembly；
At least part of the shell is configured to vibrate relative to the fixing piece；
The driving component includes at least one coil, the floating permanent magnet of at least one magnetic and at least one piece of driving magnet, the line
Circle, the magnetic float permanent magnet and are fixedly connected with the fixing piece, and the driving magnet is fixedly connected with the shell, Huo Zhesuo
It states the floating permanent magnet of coil, the magnetic to be fixedly connected with the shell, the driving magnet is fixedly connected with the fixing piece, institute
It states and forms repulsion between the floating permanent magnet of magnetic and the driving magnet；
The coil is located at the side of the driving magnet, and the coil passes through the magnetic field that the driving magnet generates.
2. vibration-sound generating device according to claim 1, which is characterized in that it further include lower casing, the coil and the magnetic
Floating permanent magnet is fixedly connected on the lower casing, and the lower casing is fixedly connected with the fixing piece.
3. vibration-sound generating device according to claim 1, which is characterized in that the driving magnet uses Halbach magnetic
Body.
4. vibration-sound generating device according to claim 3, which is characterized in that the halbach magnets are at least two groups,
Gap is formed between two adjacent groups halbach magnets, the gap is the magnetic field-enhanced region of the halbach magnets, institute
It states coil to be located in the gap, the routing region passes through the magnetic field that the halbach magnets generate.
5. vibration-sound generating device according to claim 4, which is characterized in that the driving component further includes protective shell, institute
It states driving magnet and is fixedly connected by the protective shell with the part for vibration of the shell.
6. vibration-sound generating device according to claim 5, which is characterized in that the protective shell includes side, with it is described
The side in the separate gap of halbach magnets described in adjacent two groups in side is provided with magnetic conductive board.
7. vibration-sound generating device according to claim 4, which is characterized in that every group of halbach magnets include along vibration side
To three pieces of permanent magnets of arrangement, positioned at both ends permanent magnet magnetizing direction perpendicular to direction of vibration, and magnetizing direction is on the contrary, position
Direction of vibration is parallel in the magnetizing direction of the permanent magnet at middle part；Two adjacent groups halbach magnets positioned at the two of direction of vibration
The magnetizing direction of the permanent magnet at end is identical, and the magnetizing direction positioned at the permanent magnet at middle part is opposite.
8. vibration-sound generating device according to claim 7, which is characterized in that the centre of the coil has through-hole, described
Be the routing region of coil around through-hole, the routing region include one section close to the shell for vibration part the
Second routing region of the part for vibration of one routing region and one section far from the shell, first routing region and
The direction of routing of second routing region is parallel to the surface of the part for vibration of the shell；
Two adjacent groups halbach magnets form magnetic field between the permanent magnet of the part for vibration of the shell, institute
The first routing region is stated across the magnetic field；The part for vibration far from the shell of two adjacent groups halbach magnets
Magnetic field is formed between permanent magnet, second routing region passes through the magnetic field.
9. vibration-sound generating device according to claim 1, which is characterized in that the driving component is configured to correspond to one
Two pieces of driving magnets are arranged in coil, and the gap, two rings of the coil are formed between two pieces of driving magnets
Shape end face is respectively facing two pieces of driving magnets, forms magnetic field between two pieces of driving magnets.
10. vibration-sound generating device according to claim 9, which is characterized in that the magnetic pole of one of driving magnet
Direction are as follows: N is extremely close to the part for vibration of the shell, the extremely part for vibration far from the shell S；
The pole orientation of another piece of driving magnet are as follows: the extremely part for vibration far from the shell N, S is extremely close to institute
State the part for vibration of shell；
The routing region includes one section separate for the first routing region of the part of vibration and one section close to the shell
Second routing region of the part for vibration of the shell, the cabling side of first routing region and the second routing region
To the surface for the part for vibration for being parallel to the shell；
Two pieces of driving magnets form magnetic field between the magnetic pole of the part for vibration of the shell, and described first
Routing region passes through the magnetic field；Shape between the magnetic pole of the part for vibration far from the shell of two pieces of driving magnets
At magnetic field, second routing region passes through the magnetic field.
11. vibration-sound generating device according to claim 2, which is characterized in that the middle part of the lower casing forms bulge-structure,
The coil is fixed on the bulge-structure, and the magnetic floats at least side that permanent magnet is set to the bulge-structure, described
Halbach magnets are floated permanent magnet with magnetic described in two groups and are oppositely arranged；Or
The lower casing is that the floating permanent magnet of magnetic described in laminated structure is arranged on the lower casing, and the coil is arranged on the magnetic
On floating permanent magnet.
12. vibration-sound generating device according to claim 2, which is characterized in that be permeability magnetic material in the lower casing.
13. vibration-sound generating device according to claim 2, which is characterized in that the part for vibration of the shell is
Screen or the rear cover opposite with the screen.
14. a kind of electronic product characterized by comprising
Vibration-sound generating device as described in claim 1-13 is one of any；
Product main body, the fixing piece are a part of structure of the product main body, and the driving component is arranged in the product
In main body.
15. electronic product according to claim 14, which is characterized in that the fixing piece is in the product main body
Frame, PCB or side wall.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910330100.3A CN110049416B (en) | 2019-04-23 | 2019-04-23 | Vibration sound production device and electronic product |
| PCT/CN2019/129751 WO2020215786A1 (en) | 2019-04-23 | 2019-12-30 | Vibration sounding device and electronic product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910330100.3A CN110049416B (en) | 2019-04-23 | 2019-04-23 | Vibration sound production device and electronic product |
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| Publication Number | Publication Date |
|---|---|
| CN110049416A true CN110049416A (en) | 2019-07-23 |
| CN110049416B CN110049416B (en) | 2021-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910330100.3A Active CN110049416B (en) | 2019-04-23 | 2019-04-23 | Vibration sound production device and electronic product |
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| Country | Link |
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| WO (1) | WO2020215786A1 (en) |
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| CN111065026A (en) * | 2019-11-25 | 2020-04-24 | 瑞声科技(新加坡)有限公司 | Screen sounder and electronic equipment applying same |
| WO2020215786A1 (en) * | 2019-04-23 | 2020-10-29 | 歌尔股份有限公司 | Vibration sounding device and electronic product |
| WO2020215785A1 (en) * | 2019-04-23 | 2020-10-29 | 歌尔股份有限公司 | Vibrating sound production apparatus and electronic product |
| WO2021042877A1 (en) * | 2019-09-06 | 2021-03-11 | 华为技术有限公司 | Mobile terminal |
| WO2021047300A1 (en) * | 2019-09-12 | 2021-03-18 | 华为技术有限公司 | Display terminal |
| WO2021103526A1 (en) * | 2019-11-25 | 2021-06-03 | 歌尔股份有限公司 | Vibration exciter for electronic product and electronic product |
| WO2021109559A1 (en) * | 2019-12-02 | 2021-06-10 | 歌尔股份有限公司 | Vibration sound production device for electronic product, and electronic product |
| WO2021135831A1 (en) * | 2019-12-30 | 2021-07-08 | 歌尔股份有限公司 | Exciter and electronic product |
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Also Published As
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| WO2020215786A1 (en) | 2020-10-29 |
| CN110049416B (en) | 2021-02-19 |
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