CN103378703B - Linear vibrator - Google Patents

Abstract

The invention provides a kind of linear vibrator, described linear vibrator comprises: standing part, provides the inner space with preliminary dimension; Magnet and coil, be arranged in described inner space, to produce electromagnetic force; Mass body, is vibrated by electromagnetic force; Elastic component, is fixed to described standing part, and to transmit the vibration of described mass body, wherein, described standing part and described elastic component comprise the position be formed at wherein and fix holding portion, with the initial position of fixing described elastic component.

Description

Linear vibrator

Technical field

The present invention relates to a kind of linear vibrator, more particularly, relate to and a kind ofly can be mounted in portable electronic and the linear vibrator of vibration generating apparatus can be applied to.

Background technology

Recently, along with the issue of the personal digital assistant with user friendly large liquid crystal display (LCD) screen increases fast, have employed touch-screen scheme, and employed for the vibrative vibrating motor when touching.

Utilize as a kind of the assembly that electric energy conversion is mechanical oscillation by the principle producing electromagnetic force, vibrating motor is installed in personal digital assistant, thus by being used to user voicelessly notify that user receives calls by vibration passing.

According to prior art, employ and rotated with the rotor portion making to have unbalance mass, block the scheme obtaining mechanical oscillation by producing revolving force.In this scheme, by the rectified action of the contact point between brush and commutator, revolving force is converted into mechanical oscillation.

But, utilize in the electric brush type structure of commutator this, due to the gap of brush between commutator segment when motor rotates, therefore can cause mechanical friction and electric spark, and can foreign matter be produced, thus the life-span of motor can be reduced.

In addition, when voltage is applied to motor, due to moment of inertia, so a certain amount of time will be spent just to reach the vibration of target level, therefore realizing in touch-screen can Shortcomings in appropriate vibration.

In touch-screen, realize vibrating function in order to the defect that solves in the service life reduction of motor and response characteristic difference, mainly use linear vibrator.

Linear vibrator is not the Principle of Rotating utilizing motor, but periodically produces electromagnetic force according to resonance frequency, to cause resonance by the spring be installed in linear vibrator and the mass body be suspended from spring, thus produces vibration.

But, according in the linear vibrator of prior art, spring is being attached in the process of housing, is being attached to while spring dislocation often occurs the phenomenon of housing, causing linear vibrator to occur defect in generation linear oscillator.

As a result, use the performance of the portable electron device of linear vibrator to be also affected, also reduce the life-span of portable electron device.

Prior art file 2011-0125988 Korea Patent Laid openly still has defect, that is, when spring is fixed to housing, the position of spring changes, thus can make the performance degradation of portable electron device.

Summary of the invention

An aspect of of the present present invention provides a kind of and can pass through when elastic component is incorporated into standing part the initial position of elastic component is stably fixed to standing part and prevents the linear vibrator of the Contact of oscillating component and standing part in advance.

According to an aspect of the present invention, provide a kind of linear vibrator, described linear vibrator comprises: standing part, provides the inner space with preliminary dimension; Magnet and coil, be arranged in described inner space, to produce electromagnetic force; Mass body, is vibrated by electromagnetic force; Elastic component, is fixed to described standing part, and to transmit the vibration of described mass body, wherein, described standing part and described elastic component comprise the position be formed at wherein and fix holding portion, with the initial position of fixing described elastic component.

Described position is fixed holding portion and can be comprised the primary importance penetrating described standing part and fix holding portion and the second place be formed in described elastic component fixes holding portion.

The described second place fixes holding portion can penetrate described elastic component.

The described second place fixes holding portion by the pressure of the presumptive area of described elastic component being formed.

Described elastic component can comprise: stiff end, is attached to described standing part; Free end, vibrates together with described mass body; At least one intercell connector part, is connected to each other described stiff end and described free end, to provide elastic force.

The described second place fixes holding portion can be formed in described stiff end place.

The described second place is fixed holding portion and can be penetrated described stiff end or can cave in inwards along external diameter direction from the inner side of described stiff end.

Holding portion is fixed in described position can be relative to each other symmetrical based on the vibration axis of described mass body.

Described standing part can comprise provides described inner space and the bracket with the housing of unlimited bottom and the described unlimited bottom of closed described housing, and described position is fixed holding portion and can be formed in described housing and described elastic component.

Described elastic component can comprise stiff end, free end and at least one intercell connector part, described stiff end is attached to described standing part, described free end vibrates together with described mass body, described stiff end and described free end are connected to each other by least one intercell connector part described, to provide elastic force, described position is fixed holding portion and can be comprised: primary importance fixes holding portion, penetrates described housing; The second place fixes holding portion, penetrates described stiff end or caves in inwards along external diameter direction from the inner side of described stiff end.

Accompanying drawing explanation

By the detailed description of carrying out below in conjunction with accompanying drawing, above and other aspect of the present invention, feature and other advantage will clearly be understood, in the accompanying drawings:

Fig. 1 is the decomposition diagram that linear vibrator is according to an embodiment of the invention shown;

Fig. 2 is the schematic partial cut-away perspective view that linear vibrator is according to an embodiment of the invention shown;

Fig. 3 is the schematic sectional view that linear vibrator is according to an embodiment of the invention shown;

Fig. 4 illustrates that the initial position of elastic component is fixed to the schematic, exploded perspective view of the principle of the housing be arranged in linear vibrator according to an embodiment of the invention;

Fig. 5 is the perspective schematic view of the state that the housing utilizing fixture to be fixed to by the initial position of elastic component to be arranged in linear vibrator is according to an embodiment of the invention shown;

Fig. 6 illustrates to be arranged on the schematic, exploded perspective view that the modified example of elastic component in linear vibrator according to an embodiment of the invention and the initial position of elastic component are fixed to the principle of housing;

Fig. 7 is the schematic sectional view of the linear vibrator illustrated according to another embodiment of the present invention;

Fig. 8 is the schematic sectional view of the linear vibrator illustrated according to another embodiment of the present invention.

Embodiment

Embodiments of the invention are described in detail now with reference to accompanying drawing.But, should be noted that, spirit of the present invention is not limited to embodiment set forth herein, this area and understand those skilled in the art by increasing in spirit of the present invention, amendment and remove assembly and easily can obtain the invention of other embodiments or the deterioration comprised in identical spirit, but these inventions or embodiment will be interpreted as being contained in spirit of the present invention.

In addition, in all of the figs, identical label will be used to indicate the same components within the scope of the invention with identity function.

Fig. 1 is the decomposition diagram that linear vibrator is according to an embodiment of the invention shown; Fig. 2 is the schematic partial cut-away perspective view that linear vibrator is according to an embodiment of the invention shown; Fig. 3 is the schematic sectional view that linear vibrator is according to an embodiment of the invention shown.

Referring to figs. 1 through Fig. 3, linear vibrator 100 can comprise according to an embodiment of the invention: standing part 110, provides the outward appearance of linear vibrator 100; Magnet 120 and coil 130, produce electromagnetic force; Oscillating mass body 140; Elastic component 150, the vibration of Transfer Quality body 140, wherein, standing part 110 and elastic component 150 can have the position be formed at wherein and fix holding portion 160.

Standing part 110 can provide the inner space with preliminary dimension.More particularly, standing part 110 can comprise the bracket 114 of the housing 112 with unlimited bottom and the bottom opened wide being attached to housing 112.

Here, housing 112 and bracket 114 can form the space that can hold magnet 120, coil 130, mass body 140 etc., and housing 112 and bracket 114 can be formed integral with one anotherly.

Meanwhile, housing 112 can comprise the anti-contact portion 170 be arranged on its inner surface closed, to prevent from contacting along with the linear oscillator of mass body 140 between mass body 140 with the housing 112 arranged as standing part 110.

Anti-contact portion 170 can be formed by elastomeric material, and can prevent the undue oscillation due to mass body 140 from causing the Contact of mass body 140 and housing 112 and produce contact noise and cause mass body 140 to wear and tear.

Here, anti-contact portion 170 can be formed by the material of such as rubber, cork, polypropylene, Poron (polyurethane) etc., and to absorb external impact when there is external impact, but the material of anti-contact portion 170 is not limited thereto.That is, anti-contact portion 170 can be formed by any material that can absorb impact.

Meanwhile, housing 112 can have the position be formed at wherein and fix holding portion 160, to hold the directing pin P of fixture X, will provide the detailed description to this part content below with reference to Fig. 4 and Fig. 5.

The magnet 120 and yoke plate 180 of description can be formed the magnetic field part of linear vibrator 100 below, and the inner surface closed of the housing 112 of standing part 110 is incorporated into by least one in adhesive bonding method, pressing method and welding method.

Here, magnet 120 can have the overall diameter less than the interior diameter of the coil 130 being attached to support 190.Therefore, when coil 130 and mass body 140 vibrate, the Contact of coil 130 and magnet 120 can be prevented.

Meanwhile, the inner surface closed of housing 112 can be provided with outstanding with the fixation wall 113 of the overall diameter corresponding to magnet 120, and magnet 120 can be inserted into and be fixed on the inner surface of fixation wall 113, so that magnet 120 is firmly bonded to housing 112 more.

Magnet 120 can comprise the yoke plate 180 being attached to its lower surface, forms with the interaction by coil 130 and magnet 120 magnetic line of force flowing to magnet 120 reposefully, thus produces electromagnetic force.

Yoke plate 180 can be formed by magnetic material, and described magnetic material can allow magnetic fluid M to be applied reposefully.

That is, can be applied with magnetic fluid M between the outer surface of magnet 120 and yoke plate 180 and coil 130, wherein, magnetic fluid M can be used for preventing mass body 140 abnormal vibrations.

In other words, magnetic fluid M can be arranged at the gap location be formed between magnet 120 and coil 130, to make mass body 140 perform stable vertical motion, and the horizontal jitter of the magnetic fluid M mass body 140 that can prevent the factor due to such as external impact etc. from causing or vertically shake and the abnormal vibrations that causes.

When one that magnetic fluid M (a kind of material with the characteristic making the magnetic line of force of magnet 120 collect) is applied to magnet 120 surperficial, the magnetic line of force that magnetic fluid M can concentrate on magnet 120 produces some place, to form annular shape.

Here, magnetic fluid M can be prepared like this: be scattered in liquid by gluey magnetic powder particles, then add surfactant wherein, thus magnetic powder particles can not precipitate due to gravity, magnetic field etc. or condense.As the example of magnetic fluid M, use the material by iron-cobalt alloy particle being scattered in preparation in oil or water and tri-iron tetroxide.Recently, the material by cobalt being scattered in preparation in toluene has been employed.

These Magnaglos can be ultrafine particle powders, and can move according to the distinctive Brownian movement of ultra-fine grain, even if thus when external magnetic field, gravity, centrifugal force etc. are applied to these Magnaglos, magnetic powder particles also can keep uniform concentration in a fluid.

In addition, magnetic fluid M can fill the gap between the inner surface of the outer surface of magnet 120 and the hollow space of coil 130, vibrates reposefully to allow mass body 140 or slides.

As the assembly being produced electromagnetic force by the electromagnetic interaction with magnet 120, coil 130 can be fixed by support 190, and can form the oscillating component of linear vibrator 100 according to an embodiment of the invention together with mass body 140.

Here, the vibration of coil 130 and mass body 140 is transmitted by elastic component 150, and coil 130 can be configured in the face of magnet 120.

Meanwhile, a part for magnet 120 can be inserted in the space formed by coil 130, and the interior diameter of coil 130 can slightly larger than the overall diameter of magnet 120.

Therefore, in the vibration processes of mass body 140, coil 130 and magnet 120 can remain on their discontiguous states each other.

In addition, coil 130 can in conjunction with and be fixed to the hollow inner peripheral surface of support 190, and when electric current being applied to coil 130 according to preset frequency, magnetic field can be induced near coil 130.

In this case, when applying electric current by coil 130, the magnetic line of force passing coil 130 from magnet 120 can be formed along horizontal direction, and the magnetic field produced by coil 130 can be formed along vertical direction, thus mass body 140 and coil 130 vibrate along vertical direction.

Therefore, can perpendicular to one another with the direction of vibration of mass body 140 in the direction of the magnetic line of force in magnet 120.

Here, provide by power connector end 193 being attached to the substrate 192 of mass body 140 electric current being applied to coil 130, that is, there is the external power of preset frequency.

Meanwhile, substrate 192 can be provided with damping portion 194, and damping portion 194 realizes the effect identical with the effect of above-mentioned anti-contact portion 170, and wherein, damping portion 194 can be the assembly identical with anti-contact portion 170.

But damping portion 194 is not limited to be arranged on substrate 192, but also can be arranged on support 190, coil 130 or bracket 114 in the face of substrate 192 a surface on.

Support 190 can be attached to the outer surface of coil 130, can support mass body 140 regularly, and can have the cylinder form of the hollow that upper and lower is opened wide.

More particularly, support 190 can comprise the cylindrical vertical part 190a of the inner peripheral surface of outer surface and the mass body 140 being attached to coil 130 and extend the horizontal component 190b of the upper surface to support mass body 140 from the end of vertical portion 190a along external diameter direction.

In addition, support 190 can be formed by the material containing iron, to allow support 190 to utilize the material identical with the material of elastic component 150 to be formed, thus by support 190 and elastic component 150 easily and be bonded to each other securely.

But the material that support 190 and elastic component 150 are not limited to by comprising iron is formed, but can be formed by any material, as long as support 190 and elastic component 150 can easily and be bonded to each other securely.

As the lower surface of the outer surface of vertical portion 190a and the horizontal component 190b of support 190 that are attached to support 190 with the vibration main body of vertical vibrating, mass body 140 can have the overall diameter less than the interior diameter of the inner surface of housing 112, thus when mass body 140 vertical vibrating, mass body 140 can vibrate non-contactly with standing part 110 in standing part 110.

Therefore, the gap with preliminary dimension can be formed between the inner surface of housing 112 and the outer surface of mass body 140.

This mass body 140 can be formed by not being subject to the paramagnetic material of the magnetic influence produced by magnet 120 or nonmagnetic substance.

Therefore, mass body 140 can be formed by the material (such as, tungsten) of proportion higher than the proportion of iron, to increase the quality of mass body 140 while keeping volume identical, to regulate resonance frequency, thus increases vibratory output significantly.

But mass body 140 is not limited to be formed by tungsten, but also can be formed by various material according to the intention of designer.

As the housing 112 be fixed to corresponding to standing part 110 with the assembly of the vibration of Transfer Quality body 140, elastic component 150 can be flat spring, and this flat spring comprises: stiff end 152, is attached to the housing 112 corresponding to standing part 110; Free end 154, vibrates together with mass body 140; At least one intercell connector part 156, is connected to each other stiff end 152 and free end 154, to provide elastic force.

That is, stiff end 152 can be the part of the inner surface closed being fixed to housing 112, and free end 154 can be the part being fixed to support 190.

Here, free end 154 can be provided with the size accommodation hole H larger than the overall diameter of magnet 120, to hold magnet 120, so as not to affecting the vibration of mass body 140.

Therefore, when mass body 140 vertical vibrating, accommodation hole H can prevent the Contact of mass body 140 and magnet 120.

In addition, intercell connector part 156 can be the part bending to produce elastic force between stiff end 152 and free end 154 along the hand of spiral.

Here, the combination between stiff end 152 and housing 112 and the combination between free end 154 and support 190 can be fixed with welding manner.

Meanwhile, similar with housing 112, elastic component 150 can have the position be formed at wherein and fix holding portion 160, to hold the directing pin P of fixture X, will provide the detailed description to this part content below with reference to Fig. 4 and Fig. 5.

Fig. 4 illustrates that the initial position of elastic component is fixed to the schematic, exploded perspective view of the principle of the housing be arranged in linear vibrator according to an embodiment of the invention; Fig. 5 is the perspective schematic view of the state that the housing utilizing fixture to be fixed to by the initial position of elastic component to be arranged in linear vibrator is according to an embodiment of the invention shown.

With reference to Fig. 4 and Fig. 5, be included in housing 112 in standing part 110 and elastic component 150 and can have the position be formed at wherein and fix holding portion 160, to hold the directing pin P of fixture X.

The assembly that holding portion 160 can be the initial position fixing elastic component 150 when elastic component 150 is incorporated into housing 112 is fixed in position.

More particularly, position is fixed holding portion 160 and can be comprised the primary importance be formed in housing 112 and fix holding portion 162 and the second place be formed in elastic component 150 fixes holding portion 164.

At least one primary importance is fixed holding portion 162 and can be formed on the edge of the upper surface of housing 112, to penetrate the upper surface of housing 112.

Here, multiple primary importance is fixed holding portion 162 and can be formed and the vibration axis be set to based on mass body 140 is relative to each other symmetrical.

Meanwhile, the second place fixes holding portion 164 by the pressure of the presumptive area of elastic component 150 being formed.More particularly, the second place fixes stiff end 152 place that holding portion 164 can be formed in elastic component 150.

That is, the second place is fixed holding portion 164 and can be caved in inwards along external diameter direction from the inner side of stiff end 152, and it is corresponding to be formed as fixing holding portion 162 with primary importance.

In addition, multiple second place is fixed holding portion 164 and can be formed and the vibration axis be set to based on mass body 140 is relative to each other symmetrical.

Here, primary importance is fixed holding portion 162 and the second place and is fixed the directing pin P that holding portion 164 can hold fixture X, to fix the position of elastic component 150 in housing 112, thus fix the initial position of elastic component 150 when elastic component 150 being attached to housing 112 with welding manner.

In other words, due to the characteristic of manufacturing process, inner surface (zoomed-in view see Fig. 3) place that may be difficult to the border between the inner surface closed and the outer surface of housing 112 of housing 112 realizes accurate perpendicularity, thus this inner surface is formed usually to a certain extent sleekly.

Therefore, the entire outer diameter of elastic component 150, that is, the diameter in the outside of stiff end 152 should be slightly less than the diameter of the inner surface of housing 112, and housing 112 provides the space can moved for elastic component 150 wherein.

At the overall overall diameter of elastic component 150, namely, when the diameter in the outside of stiff end 152 corresponds to the diameter of the inner surface of housing 112, elastic component 150 contact with the inner surface closed of housing 112, but is separated by the closed inner surface of the inner surface (zoomed-in view see Fig. 3) formed sleekly and the housing 112 on the border between the inner surface closed of housing 112 and the outer surface of housing 112.

In this case, when elastic component 150 is welded together with housing 112, go wrong in the adhesion between elastic component 150 and housing 112.

Therefore, improve adhesion to conveniently carry out welding when being welded together with housing 112 by elastic component 150, the overall overall diameter of elastic component 150 need be slightly less than the diameter of the inner surface of housing 112 simultaneously.

Here, when elastic component 150 is soldered to housing 112, such possibility can be there is: the space that can produce due to the difference between the integral diameter of elastic component 150 and the diameter of the inner surface of housing 112 will change the initial position of elastic component 150.

But according to embodiments of the invention, position is fixed holding portion 160 and is formed in housing 112 and elastic component 150, thus can prevent above-mentioned possibility in advance.

In other words, when elastic component 150 is soldered to housing 112, technique can be performed being placed on by housing 112 under the state on fixture X.In this case, the primary importance that the directing pin P of fixture X penetrates housing 112 fixes holding portion 162, thus housing 112 stably can be fixed to the directing pin P of fixture X.

After housing 112 is stably fixed to fixture X, elastic component 150 can be placed on housing 112.Now, the directing pin P of fixture X can be housed inside the second place be formed in elastic component 150 and fixes in holding portion 164.

Therefore, elastic component 150 can be stably fixed in housing 112, and can prevent such possibility in advance: elastic component 150 moves due to the difference between the integral diameter of elastic component 150 and the diameter of the inner surface of housing 112.

Therefore, the directing pin P of fixture X is contained in position and fixes in holding portion 160, thus fixes the initial position of elastic component 150 under the state that can contact the inner surface closed of housing 112 at elastic component 150.

Then, elastic component 150 and housing 112 are bonded to each other by firm welding.After elastic component 150 and housing 112 are welded to one another, the vibration dead in line of the center of elastic component 150 and the center of housing 112 and mass body 140 can be allowed.

Therefore, prevent the difference between the center of the housing 112 that may produce when welding and the center of elastic component 150 in advance, thus the contact when mass body 140 vibrates between housing 112 and mass body 140 can be reduced significantly.

In this case, although the second place fixes holding portion 164 can be formed as hole (see Fig. 6) at stiff end 152 place, but fix holding portion 164 is formed as groove (as shown in Figures 4 and 5) in the second place, still can guarantee elastic force.

In other words, elastic component 150 can comprise stiff end 152 as above, free end 154 and intercell connector part 156, and wherein, the assembly affecting elastic force in said modules can be intercell connector part 156.

That is, the occupation ratio of intercell connector part 156 in elastic component 150 is higher, and elastic force is larger.For this reason, stiff end 152 and free end 154 need to have relative low occupation ratio.

Therefore, in order to ensure the elastic force of elastic component 150, the occupation ratio of stiff end 152 needs significantly to reduce.For this reason, the second place fixes holding portion 164 can be formed as groove, instead of hole.

Fig. 6 illustrates to be arranged on the schematic, exploded perspective view that the modified example of elastic component in linear vibrator according to an embodiment of the invention and the initial position of elastic component are fixed to the principle of housing.

With reference to Fig. 6, be included in housing 112 in standing part 110 and elastic component 250 and can comprise the position be formed at wherein and fix holding portion 260, to hold the directing pin P of fixture X.

More particularly, position is fixed holding portion 260 and can be comprised the primary importance penetrating housing 112 and elastic component 250 respectively and fix holding portion 162 and the second place fixes holding portion 264, wherein, the second place fixes stiff end 252 place that holding portion 264 can be formed in elastic component 250.

Here, primary importance is fixed holding portion 162 and the second place and is fixed holding portion 264 and can be formed in position to correspond to each other, and the directing pin P of fixture X penetrates primary importance and fixes holding portion 162 and the second place fixes holding portion 264, thus under the state that can contact the inner surface closed of housing 112 at elastic component 250, fix the initial position of elastic component 250.

Therefore, when elastic component 250 is incorporated into housing 112 by welding, the vibration dead in line of the center of elastic component 250 and the center of housing 112 and mass body 140 can be allowed after being welded.

Therefore, prevent the difference between the center of the housing 112 that may produce when welding and the center of elastic component 250 in advance, thus the contact when mass body 140 vibrates between mass body 140 and housing 112 can be reduced significantly.

Fig. 7 is the schematic sectional view of the linear vibrator illustrated according to another embodiment of the present invention.

With reference to Fig. 7, except forming the position of magnet 320 and yoke plate 380, linear vibrator 300 is according to another embodiment of the present invention identical with the linear vibrator according to an embodiment of the invention 100 described referring to figs. 1 through Fig. 6.Therefore, will omit the description except forming the position of magnet 320 and yoke plate 380.

Magnet 320 is incorporated into standing part 310, but different from above-described linear vibrator according to an embodiment of the invention 100, and magnet 320 can be attached to the bracket 314 of standing part 310, instead of is attached to the housing 312 of standing part 310.

Here, bracket 314 can comprise gives prominence to fixation wall 313 with fixed magnets 320 from the upper surface of bracket 314, and magnet 320 is inserted into and is fixed on the inner surface of fixation wall 313, thus magnet 320 can be firmly bonded to bracket 314 relatively more.

Meanwhile, magnet 320 can comprise the yoke plate 380 of the upper surface being attached to magnet 320, forms with the interaction by coil 330 and magnet 320 magnetic line of force flowing to magnet 320 reposefully, thus produces electromagnetic force.

In addition, because magnet 320 is attached to bracket 314, so the accommodation hole H of the elastic component 150 described referring to figs. 1 through Fig. 3 can not be there is.

Fig. 8 is the schematic sectional view of the linear vibrator illustrated according to another embodiment of the present invention.

With reference to Fig. 8, except magnet 420, linear vibrator 400 according to another embodiment of the present invention has the structure identical with effect with the structure of the linear vibrator according to an embodiment of the invention 100 described referring to figs. 1 through Fig. 6 and effect.Therefore, will omit the description except magnet 420.

Magnet 420 can comprise the first magnet 422 and the second magnet 424.

First magnet 422 can contact the inner surface closed on the top of the housing 412 be included in standing part 410, and the second magnet 424 can be attached to the upper surface of bracket 414.

In order to produce magnetic field, each in first magnet 422 and the second magnet 424 can be by magnetizing its upper and lower along vertical direction to have opposed polarity thus to produce the permanent magnet with the magnetic force of predetermined strength, and the first magnet 422 and the second magnet 424 can be incorporated into the inner surface closed of housing 412 and the upper surface of bracket 414 respectively.

In addition, in order to produce magnetic force, the first magnet 422 and the second magnet 424 can be provided so that the magnetic pole with identical polar is facing with each other, and the first magnet 422 and the second magnet 424 can be spaced.

Be present in the magnetic line of force between the first magnet 422 and the second magnet 424 to be propagated along external diameter direction by the magnetic pole that is provided to have identical polar the first magnet 422 facing with each other and the second magnet 424, thus magnetic efficiency can be made to improve.Specifically, magnetic force concentrates on and is positioned at coil 430 outside the first magnet 422 and the second magnet 424 position crossing with the magnetic line of force, thus compared with single magnet, a large amount of electromagnetic forces and vibration (supposing that identical volume consumes the electric current of equivalent) can be realized.

But magnet 420 is not limited to comprise the first magnet 422 and the second magnet 424, but also can comprise two or more magnets, as long as the magnetic pole with identical polar is facing with each other.

Here, the second magnet 424 can comprise the yoke plate 480 of the upper surface being attached to the second magnet 424, forms with the interaction by coil 430 and the second magnet 424 magnetic line of force flowing to the second magnet 424 reposefully, thus produces electromagnetic force.

But yoke plate 480 is not limited to the upper surface being attached to the second magnet 424, but upper surface and the lower surface of the first magnet 422 can also be attached to simultaneously, or be attached to the lower surface of the first magnet 422 individually.

As mentioned above, utilize linear vibrator according to an embodiment of the invention, when elastic component is incorporated into standing part, fix the initial position of elastic component Absorbable organic halogens.

In addition, the initial position of elastic component is stably fixed, thus can prevent the Contact of standing part and oscillating component in advance.

Although illustrate and describe the present invention in conjunction with the embodiments, to those skilled in the art it will be clear that, when not departing from the spirit and scope of the present invention defined by the claims, can modify and modification.

This application claims and be submitted to the priority of the 10-2012-0038475 korean patent application of Korean Intellectual Property Office on April 13rd, 2012, disclosed in this application, content is contained in this by reference.

Claims (3)

1. a linear vibrator, comprising:

Standing part, provides the inner space with preliminary dimension;

Magnet and coil, be arranged in described inner space, to produce electromagnetic force;

Mass body, is vibrated by electromagnetic force;

Elastic component, is fixed to described standing part, to transmit the vibration of described mass body,

Wherein, described standing part and described elastic component comprise the position be formed in described standing part and described elastic component and fix holding portion, with the initial position of fixing described elastic component,

Wherein, described position is fixed holding portion and is comprised the primary importance penetrating described standing part and fix holding portion and the second place be formed in described elastic component fixes holding portion,

Wherein, described elastic component comprises: stiff end, is attached to described standing part; Free end, vibrates together with described mass body; At least one intercell connector part, is connected to each other described stiff end and described free end, to provide elastic force,

Wherein, the described second place is fixed holding portion and is caved in inwards along external diameter direction from the inner side of described stiff end.

2. linear vibrator as claimed in claim 1, wherein, it is relative to each other symmetrical based on the vibration axis of described mass body that holding portion is fixed in described position.

3. linear vibrator as claimed in claim 1, wherein, described standing part comprises to be provided described inner space and has the housing of unlimited bottom and be attached to the bracket of described unlimited bottom of described housing,

Described position is fixed holding portion and is formed in described housing and described elastic component.