CN103378703A

CN103378703A - Linear vibrator

Info

Publication number: CN103378703A
Application number: CN201210194891XA
Authority: CN
Inventors: 房帝贤
Original assignee: Samsung Electro Mechanics Co Ltd
Current assignee: Mplus strain
Priority date: 2012-04-13
Filing date: 2012-06-13
Publication date: 2013-10-30
Anticipated expiration: 2032-06-13
Also published as: KR101300334B1; CN103378703B

Abstract

The invention provides a linear vibratior, which comprises a fixing part for providing an inner space with preset dimesion; a megnetic body and a coil, which are equipped in the inner space for generating electromagnetic force; a mass body for vibration by electromagnetic force; an elastic component which is fixed to the fixing part for transmitting vibration of the mass body, wherein, the fixing part and the elastic component comprise a fixed containing part formed in the position for fixing an initial position of the elastic component.

Description

Linear vibrator

Technical field

The present invention relates to a kind of linear vibrator, more particularly, relate to a kind of linear vibrator that can be installed in the portable electron device and can be applied to vibration generating apparatus.

Background technology

Recently, the issue rapid growth along with the personal digital assistant with user friendly large liquid crystal display (LCD) screen has adopted the touch-screen scheme, and has used for vibrative vibrating motor when touching.

With the assembly of electric energy conversion for mechanical oscillation, vibrating motor is installed in the personal digital assistant, is used to voicelessly notify the user to receive calls by vibration being passed to the user thus as a kind of principle that produces electromagnetic force of utilizing.

According to prior art, used by producing revolving force so that have the scheme that the rotor portion of unbalance mass, piece rotates to obtain mechanical oscillation.In this scheme, the rectified action by the contact point between brush and the commutator is converted into mechanical oscillation with revolving force.

Yet, in this electric brush type structure of utilizing commutator, because brush passes through gap between the commutator segment when motor rotate, so can cause mechanical friction and electric spark, and can produce foreign matter, thereby can reduce the life-span of motor.

In addition, when voltage is applied to motor, because moment of inertia so will spend the vibration that a certain amount of time just can reach target level, therefore realizes understanding Shortcomings aspect an amount of vibration in touch-screen.

For solve life-span of motor reduce and response characteristic aspect poor defective and in touch-screen, realize vibrating function, mainly used linear vibrator.

Linear vibrator is not the Principle of Rotating that utilizes motor, but periodically produces electromagnetic force according to resonance frequency, to cause resonance by the mass body that is installed on the spring in the linear vibrator and be suspended from the spring, vibrates thereby produce.

Yet, in the linear vibrator according to prior art, spring is being attached in the process of housing, the spring dislocation often occurs be attached to the phenomenon of housing, cause linear vibrator defective occurring aspect the generation linear oscillator.

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

The special permission of prior art file 2011-0125988 Korean Patent is open still to have defective, that is, be fixed at spring in the situation of housing, and the position of spring changes, thereby 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 can be incorporated in the situation of standing part the linear vibrator that stably is fixed to standing part by the initial position with elastic component and prevents from advance contacting between oscillating component and the standing part at elastic component.

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 are arranged in the described inner space, to produce electromagnetic force; Mass body vibrates 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 fixedly holding portion of the position that is formed at wherein, with the initial position of fixing described elastic component.

Described position fixedly holding portion can comprise the fixing holding portion and be formed at the fixing holding portion of the second place in the described elastic component of primary importance that penetrates described standing part.

The described second place is the penetrable described elastic component of holding portion fixedly.

The described second place fixedly holding portion can form by the presumptive area of described elastic component is depressed.

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

The described second place fixedly holding portion can be formed on described stiff end place.

The described second place is the penetrable described stiff end of holding portion or can cave in inwards along the external diameter direction from the inboard of described stiff end fixedly.

Described position fixedly holding portion can be relative to each other symmetrical based on the vibration axis of described mass body.

Described standing part can comprise the carriage that described inner space is provided and has the housing of unlimited bottom and seal the described unlimited bottom of described housing, and described position fixedly holding portion can be formed in described housing and the 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 with described mass body, described at least one intercell connector part is connected to each other described stiff end and described free end, so that elastic force to be provided, described position fixedly holding portion can comprise: primary importance is holding portion fixedly, penetrates described housing; The second place is holding portion fixedly, penetrates described stiff end or caves in inwards along the external diameter direction from the inboard of described stiff end.

Description of drawings

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

Fig. 1 illustrates the according to an embodiment of the invention decomposition diagram of linear vibrator;

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

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

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

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

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

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

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

Embodiment

Describe embodiments of the invention in detail now with reference to accompanying drawing.Yet, 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 other embodiment of in spirit of the present invention, increasing, revise and remove assembly and can easily obtaining to comprise in the identical spirit or deteriorated invention, but these inventions or embodiment will be interpreted as being contained in the spirit of the present invention.

In addition, in institute's drawings attached, identical label will be used to indicate the same components that has within the scope of the invention identity function.

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

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 fixedly holding portion 160 of the position that is formed at wherein.

Standing part 110 can provide the inner space with preliminary dimension.More particularly, standing part 110 carriage 114 that can comprise the housing 112 with unlimited bottom and be attached to the bottom of opening wide of housing 112.

Here, housing 112 and carriage 114 can form the space that can hold magnet 120, coil 130, mass body 140 etc., and housing 112 and carriage 114 can form each other.

Simultaneously, housing 112 can comprise the anti-contact portion 170 on the inner surface that is arranged on its sealing, to prevent mass body 140 and to contact along with the linear oscillator of mass body 140 between the housing 112 that arranges as standing part 110.

Anti-contact portion 170 can be formed by elastomeric material, and can prevent that contact produces contact noise and causes mass body 140 to wear and tear between mass body 140 and the housing 112 because the undue oscillation of mass body 140 causes.

Here, anti-contact portion 170 can be formed by the material such as rubber, cork, polypropylene, Poron (polyurethane) etc., and absorbing external impact in the situation of external impact to occur, the material of still anti-contact portion 170 is not limited to this.That is, anti-contact portion 170 can be formed by any material that can impact-absorbing.

Simultaneously, housing 112 can have fixedly holding portion 160 of the position that is formed at wherein, holding the guide pin P of anchor clamps X, will provide detailed description to this part content with reference to Fig. 4 and Fig. 5 below.

The magnet 120 and below yoke plate 180 of describing can be consisted of the magnetic field part of linear vibrator 100, and can be incorporated into by at least a in adhesive bonding method, pressing method and the welding method inner surface of sealing of the housing 112 of standing part 110.

Here, magnet 120 can have the little overall diameter of interior diameter than the coil 130 that is attached to support 190.Therefore, when coil 130 and mass body 140 vibration, can prevent contact between coil 130 and the magnet 120.

Simultaneously, the inner surface of the sealing of housing 112 can be provided with outstanding with the fixation wall 113 corresponding to the overall diameter of magnet 120, and magnet 120 can be inserted into and be fixed in 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 that is attached to its lower surface, forming reposefully the magnetic line of force that flows to magnet 120 with the interaction of magnet 120 by coil 130, thereby 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 the 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 that is formed between magnet 120 and the coil 130, so that mass body 140 is carried out stably vertical motion, and magnetic fluid M can prevent the horizontal jitter of the mass body 140 that causes owing to the factor such as external impact etc. or vertically shake the abnormal vibrations that causes.

Be applied at magnetic fluid M (a kind of material with characteristic that the magnetic line of force that makes magnet 120 compiles) in the situation on a surface of magnet 120, the magnetic line of force that magnetic fluid M can concentrate on magnet 120 produces the some place, to form annular shape.

Here, can prepare like this magnetic fluid M: gluey magnetic powder particles is scattered in the liquid, and then to wherein adding surfactant, thereby magnetic powder particles can be owing to gravity, magnetic field etc. precipitates or condenses.As the example of magnetic fluid M, use by iron-cobalt alloy particle being scattered in material and the tri-iron tetroxide for preparing in oil or the water.Recently, used by cobalt being scattered in the material for preparing in the toluene.

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

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

As the assembly that produces electromagnetic force by the electromagnetic interaction with magnet 120, it is fixing that coil 130 can be supported frame 190, and can consist of the according to an embodiment of the invention oscillating component of linear vibrator 100 with mass body 140.

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

Simultaneously, the part of magnet 120 can be inserted in the space that is formed by coil 130, and the interior diameter of coil 130 can be 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 each other discontiguous states.

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

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

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

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

Simultaneously, 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.

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

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

More particularly, support 190 can comprise the vertical part 190a of cylindrical shape of interior perimeter surface of the outer surface that is attached to coil 130 and mass body 140 and the horizontal component 190b that extends to support the upper surface of mass body 140 from the end of vertical part 190a along the external diameter direction.

In addition, support 190 can be formed by the material that contains iron, utilizes the material identical with the material of elastic component 150 to form to allow support 190, thereby support 190 and elastic component 150 are bonded to each other easily and securely.

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

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

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

This mass body 140 can be by not formed by paramagnetic material or nonmagnetic substance by the magnetic force that magnet 120 produces affects.

Therefore, mass body 140 can be formed by the material (such as, tungsten) that proportion is higher than the proportion of iron, increasing the quality of mass body 140 when keeping volume identical, regulating resonance frequency, thereby increases significantly vibratory output.

Yet mass body 140 is not limited to be formed by tungsten, but also can be formed by various materials according to designer's intention.

As being fixed to corresponding to the housing 112 of standing part 110 assembly with 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 is with mass body 140 vibrations; At least one intercell connector part 156 is connected to each other stiff end 152 and free end 154, so that elastic force to be provided.

That is, stiff end 152 can be the part of inner surface that is fixed to the sealing of housing 112, and free end 154 can be the part that is 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 the vibration that affects mass body 140.

Therefore, when mass body 140 vertical vibrating, accommodation hole H can prevent from contacting between mass body 140 and the magnet 120.

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

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

Simultaneously, similar with housing 112, elastic component 150 can have fixedly holding portion 160 of the position that is formed at wherein, holding the guide pin P of anchor clamps X, will provide detailed description to this part content with reference to Fig. 4 and Fig. 5 below.

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

With reference to Fig. 4 and Fig. 5, be included in housing 112 in the standing part 110 and elastic component 150 and can have fixedly holding portion 160 of the position that is formed at wherein, to hold the guide pin P of anchor clamps X.

Position fixedly holding portion 160 can be to be incorporated in the situation of housing 112 the fixedly assembly of the initial position of elastic component 150 at elastic component 150.

More particularly, the position fixedly holding portion 160 can comprise fixedly holding portion 162 and be formed at the fixing holding portion 164 of the second place in the elastic component 150 of the primary importance that is formed in the housing 112.

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

Here, a plurality of primary importances fixedly holding portion 162 can be formed and be set to based on the vibration axis of mass body 140 relative to each other symmetrical.

Simultaneously, fixedly holding portion 164 can be by depressing the presumptive area of elastic component 150 to form for the second place.More particularly, the second place fixedly holding portion 164 can be formed on stiff end 152 places of elastic component 150.

That is, the second place fixedly holding portion 164 can cave in along the external diameter direction inwards from the inboard of stiff end 152, and can form that fixedly holding portion 162 is corresponding with primary importance.

In addition, a plurality of second places fixedly holding portion 164 can be formed and be set to based on the vibration axis of mass body 140 relative to each other symmetrical.

Here, primary importance fixedly holding portion 162 and the second place fixedly holding portion 164 can hold the guide pin P of anchor clamps X, with the fixing position of elastic component 150 in housing 112, thus when with welding manner elastic component 150 being attached to housing 112 the fixing initial position of elastic component 150.

In other words, because the characteristic of manufacturing process, the inner surface (seeing the zoomed-in view of Fig. 3) that may be difficult to the border between the outer surface of the inner surface of the sealing of housing 112 and housing 112 locates to realize accurate perpendicularity, thereby 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 that can supply elasticity member 150 to move therein.

Whole overall diameter at elastic component 150, namely, in the situation of the diameter in the outside of stiff end 152 corresponding to the diameter of the inner surface of housing 112, elastic component 150 does not contact with the inner surface of the sealing of housing 112, but the inner surface of the inner surface (seeing the zoomed-in view of Fig. 3) that forms sleekly on the border between the outer surface of the inner surface of the sealing by housing 112 and housing 112 and the sealing of housing 112 separates.

In this case, when elastic component 150 and housing 112 are welded together, go wrong aspect the adhesion between elastic component 150 and housing 112.

Therefore, improve simultaneously adhesion in order conveniently to weld when elastic component 150 and housing 112 are welded together, the whole overall diameter of elastic component 150 need be slightly less than the diameter of the inner surface of housing 112.

Here, be soldered at elastic component 150 in the situation of housing 112, can have such possibility: because the difference between the diameter of the inner surface of the integral diameter of elastic component 150 and the housing 112 and space that can produce will change the initial position of elastic component 150.

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

In other words, be soldered at elastic component 150 in the situation of housing 112, can under the state that housing 112 is placed on the anchor clamps X, carry out technique.In this case, the primary importance that the guide pin P of anchor clamps X penetrates housing 112 is holding portion 162 fixedly, thereby housing 112 stably can be fixed to the guide pin P of anchor clamps X.

After housing 112 stably is fixed to anchor clamps X, elastic component 150 can be placed on the housing 112.At this moment, the guide pin P of anchor clamps X can be housed inside the second place that is formed in the elastic component 150 fixedly in the holding portion 164.

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

Therefore, the guide pin P of anchor clamps X is contained in the position fixedly in the holding portion 160, thus can be under the state of the inner surface of the sealing of elastic component 150 contact housings 112 the fixing initial position of elastic component 150.

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

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

In this case, although the second place fixedly holding portion 164 can form at stiff end 152 places hole (seeing Fig. 6), but the second place fixedly holding portion 164 form in the situation of groove (as shown in Figures 4 and 5), still can guarantee elastic force.

In other words, elastic component 150 can comprise aforesaid stiff end 152, free end 154 and intercell connector part 156, and wherein, the assembly that affects 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 need to have relative low occupation ratio with free end 154.

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 fixedly holding portion 164 can form groove, rather than the hole.

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

With reference to Fig. 6, be included in housing 112 in the standing part 110 and elastic component 250 and can comprise fixedly holding portion 260 of the position that is formed at wherein, to hold the guide pin P of anchor clamps X.

More particularly, position fixedly holding portion 260 can comprise the fixing fixing holding portion 264 of holding portion 162 and the second place of primary importance that penetrates respectively housing 112 and elastic component 250, wherein, the second place fixedly holding portion 264 can be formed on stiff end 252 places of elastic component 250.

Here, primary importance fixedly holding portion 162 and the second place fixedly holding portion 264 can be formed on the position to correspond to each other, and the guide pin P of anchor clamps X penetrates the fixedly fixing holding portion 264 of holding portion 162 and the second place of primary importance, thus can be under the state of the inner surface of the sealing of elastic component 250 contact housings 112 the fixing initial position of elastic component 250.

Therefore, be incorporated into by welding in the situation of housing 112 at elastic component 250, can after welding, allow center and the center of housing 112 and the vibration dead in line of mass body 140 of elastic component 250.

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

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

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

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

Here, carriage 314 can comprise from the outstanding fixation wall 313 with fixed magnets 320 of the upper surface of carriage 314, and magnet 320 is inserted into and is fixed in the inner surface of fixation wall 313, thereby magnet 320 can be firmly bonded to carriage 314 relatively more.

Simultaneously, magnet 320 can comprise the yoke plate 380 of the upper surface that is attached to magnet 320, forming reposefully the magnetic line of force that flows to magnet 320 with the interaction of magnet 320 by coil 330, thereby produces electromagnetic force.

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

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

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

The first magnet 422 can contact the inner surface of sealing on the top of the housing 412 that is included in the standing part 410, and the second magnet 424 can be attached to the upper surface of carriage 414.

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

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 faces with each other, and the first magnet 422 and the second magnet 424 can be spaced.

Be present in the first magnet 422 that the magnetic line of force between the first magnet 422 and the second magnet 424 faces with each other by the magnetic pole that is provided to have identical polar and the second magnet 424 and propagate along the external diameter direction, thereby magnetic efficiency is improved.Specifically, magnetic force concentrates on the position that the coil 430 that is positioned at the first magnet 422 and the second magnet 424 outsides and the magnetic line of force intersect, thereby compares with single magnet, can realize a large amount of electromagnetic forces and vibration (suppose the electric current of identical volume consumption equivalent).

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

Here, the second magnet 424 can comprise the yoke plate 480 of the upper surface that is attached to the second magnet 424, forming reposefully the magnetic line of force flow to the second magnet 424 by the interaction of coil 430 and the second magnet 424, thereby produces electromagnetic force.

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

As mentioned above, utilize according to an embodiment of the invention linear vibrator, be incorporated at elastic component in the situation of standing part, can be stably the fixing initial position of elastic component.

In addition, the initial position of elastic component is stably fixed, thereby can prevent from advance contacting between standing part and the oscillating component.

Although illustrated in conjunction with the embodiments and described the present invention, will be clear that to those skilled in the art, in the situation that does not break away from the spirit and scope of the present invention defined by the claims, can make amendment and modification.

The application requires to be submitted on April 13rd, 2012 priority of the 10-2012-0038475 korean patent application of Korea S Department of Intellectual Property, and the disclosed content of this application is contained in this by reference.

Claims

1. linear vibrator comprises:

Standing part provides the inner space with preliminary dimension;

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

Mass body vibrates by electromagnetic force;

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

Wherein, described standing part and described elastic component comprise fixedly holding portion of the position that is formed in described standing part and the described elastic component, with the initial position of fixing described elastic component.

2. linear vibrator as claimed in claim 1, wherein, described position fixedly holding portion comprises the fixing holding portion and be formed at the fixing holding portion of the second place in the described elastic component of primary importance that penetrates described standing part.

3. linear vibrator as claimed in claim 2, wherein, the described second place fixedly holding portion penetrates described elastic component.

4. linear vibrator as claimed in claim 2, wherein, the described second place fixedly holding portion forms by the presumptive area of described elastic component is depressed.

5. linear vibrator as claimed in claim 2, wherein, described elastic component comprises: stiff end is attached to described standing part; Free end vibrates with described mass body; At least one intercell connector part is connected to each other described stiff end and described free end, so that elastic force to be provided.

6. linear vibrator as claimed in claim 5, wherein, the described second place fixedly holding portion is formed on described stiff end place.

7. linear vibrator as claimed in claim 5, wherein, the described second place fixedly holding portion penetrates described stiff end or caves in inwards along the external diameter direction from the inboard of described stiff end.

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

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

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

10. linear vibrator as claimed in claim 9, wherein, described elastic component comprises: stiff end is attached to described standing part; Free end vibrates with described mass body; At least one intercell connector part is connected to each other described stiff end and described free end, so that elastic force to be provided,

Described position fixedly holding portion comprises: primary importance is holding portion fixedly, penetrates described housing; The second place is holding portion fixedly, penetrates described stiff end or caves in inwards along the external diameter direction from the inboard of described stiff end.