KR20140119360A - Voice coil motor - Google Patents

Abstract

The present invention relates to a voice coil motor that includes: a base member that accommodates a carrier part including a lens housing, and a driving part, which vertically drives the carrier part in the direction of an optic axis; a cover housing which is joined with the base member; and at least one elastic body which is arranged in the cover housing and provides elasticity that enables the carrier part to be vertically driven. At least one damping part is arranged between the elastic bodies and the base member; or/and between the cover housing and the elastic bodies.

Description

Voice coil motor {VOICE COIL MOTOR}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a voice coil motor, and more particularly, to a voice coil motor configured to absorb vibrations of an elastic body.

2. Description of the Related Art [0002] With the advent of compact and lightweight camera lens assemblies due to the development of digital camera manufacturing technology, portable communication apparatuses equipped with optical lenses and camera lens assemblies have become popular .

Particularly, the camera lens assembly employed in the portable communication device is in a trend of being developed in a direction favorable to high-performance high-capacity, miniaturization and lightweight.

The camera lens assembly employed in such a portable communication apparatus is equipped with an auto focus function, a shutter function, and a zoom function, and is equipped with an image stabilization function so as to be faithful to the camera function.

A conventional voice coil motor employed in such a camera lens assembly will now be described.

1 and 2, a conventional voice coil motor includes a base 11, a cover 12, and a cover 13. The voice coil motor 10 includes a base 11, A carrier 13 having a lens 13a, driving units 14, 16 and 17 for driving the carrier 13 up and down in the optical axis direction and upper and lower elastic members 15a and 15b . The driving units 14, 16 and 17 include a magnet 14, a yoke 16 and a coil 17. The carrier 13 and the upper and lower elastic members 15a and 15b are accommodated in the inner space provided by the combination of the base 11 and the cover 12. [

2, the upper and lower elastic members 15a and 15b mechanically support the carrier 13 and the cover (not shown) so as to accelerate the operating speed and the restoring speed of the driving units 14, 16 and 17, 12).

A conventional voice coil motor has already been disclosed in Korean Patent Laid-Open No. 10-2011-0076063 (2011, 07, 06, publication date).

However, in the conventional voice motor coil, there is a problem that when the lens is driven up and down by the driving unit, the vibration is severe and it takes a long time to hold the initial focus position of the lens

In addition, when the lens is driven in the up and down directions, in order to align the initial focal position of the lens with the initial focal position of the lens at a long distance or a long distance, not only a large initial power of the product is required, .

That is, an amount of current equal to or higher than a pre-load is required to move to the initial focal position of the lens, which has a disadvantage in that a long focus adjustment time is required. This has a problem of increasing the battery usage of a digital device having a camera module.

In addition, in the conventional voice motor coil, if the lens driven in the direction of the optical axis is supported only by the upper and lower elastic members, the settling time of the lens is increased. That is, when the settling time of the lens becomes long, continuous shooting and high-speed shooting can not be performed in proportion to the focus time of the lens.

Here, the settling time refers to a time at which the lens is stabilized at the focus position due to inertia generated when the lens is moved, a rising force of a continuously applied magnetic field, and a returning force due to the elasticity of the elastic body. That is, the settling time determines whether or not the camera is capable of high-speed shooting.

Accordingly, there is a need for a device capable of absorbing vibration during lens driving to quickly and easily hold the initial focus position of the lens, as well as to shorten the long focus adjustment time.

The present invention provides at least one damping unit that absorbs vibrations by contacting with elastic bodies, thereby absorbing vibration of the elastic bodies when the lens is driven up and down, thereby preventing long focus adjustment And to provide a voice coil motor that can shorten the time.

Further, according to the present invention, at least one damping portion for absorbing vibrations in contact with the elastic bodies is constituted, so that the lens is positioned close to the lens in order to quickly catch the initial focus position of the lens when driving up and down, The present invention is to provide a voice coil motor which can reduce the initial power consumption of a product for adjusting a focus position and can shorten a picture taking time of a user by enabling high-speed start of a lens.

In addition, the present invention eliminates the need for an initial preload for moving the lens to the initial focus position, thereby reducing the power consumption of the product and increasing the battery usage time of the product. Further, the settling time of the lens can be shortened So as to enable continuous shooting and high-speed shooting of the product.

In order to solve the above problems, the present invention provides a voice coil motor,

A base member for accommodating a carrier portion having a lens housing and a driving portion for driving the carrier portion in an optical axis direction;

A cover housing coupled to the base member; And

And at least one elastic body provided in the cover housing to provide an elastic force to be able to drive the carrier part up and down,

And at least one damping portion is provided between the elastic members and the base member, or between the cover housing and the elastic bodies, or both.

 In a voice coil motor according to a first embodiment of the present invention,

A base member for accommodating a carrier portion having a lens housing and a driving portion for driving the carrier portion in an optical axis direction;

A cover housing coupled to the base member; And

And first and second elastic members provided in the cover housing to provide an elastic force to be able to drive the carrier part up and down,

At least one damping portion is provided between the lower portion of the cover housing and the upper portion of the first elastic body or between the upper portion of the base member and the lower portion of the second elastic body.

In a voice coil motor according to a second embodiment of the present invention,

A base member for accommodating a carrier portion having a lens housing and a driving portion for driving the carrier portion in an optical axis direction;

A cover housing coupled to the base member; And

And first and second elastic members provided in the cover housing to provide an elastic force to be able to drive the carrier part up and down,

And at least one damping portion is provided between an upper portion of the base member and a lower portion of the second elastic body.

In a voice coil motor according to a third embodiment of the present invention,

A base member for accommodating a carrier portion having a lens housing and a driving portion for driving the carrier portion in an optical axis direction;

A cover housing coupled to the base member; And

And first and second elastic members provided in the cover housing to provide an elastic force to be able to drive the carrier part up and down,

And at least one damping portion is provided between a lower portion of the cover housing and an upper portion of the first elastic body.

As described above, according to the voice coil motor of the present invention,

At least one damping portion for absorbing vibration by contacting with the elastic bodies is constructed to absorb the vibration of the elastic bodies when the lens is driven up and down, thereby shortening the long focus adjustment time required for positioning the initial focus position of the existing lens And can also be positioned in close proximity to the initial focus position of the lens for a quick hold, thereby reducing the initial power requirements of the product to match the initial focus position of the lens, There is an effect that the photographing time of the user can be shortened.

In addition, since the initial pre-pressure for moving the lens to the initial focus position is not needed, the power consumption of the product is reduced and the use time of the product can be increased. Also, the settling time of the lens can be shortened It is possible not only to enable continuous shooting and high-speed shooting of the product, but also to improve the use of the product.

1 is an exploded perspective view showing a configuration of a conventional voice coil motor.
BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a voice coil motor.
3 is an exploded perspective view showing a configuration of a voice coil motor according to a first preferred embodiment of the present invention;
FIG. 4 is an exploded perspective view showing a second elastic body, a base member, and damping portions in the configuration of a voice coil motor according to a first preferred embodiment of the present invention. FIG.
FIG. 5 is an exploded perspective view of a first elastic body, a cover housing and damping portions of a voice coil motor according to a first preferred embodiment of the present invention. FIG.
FIG. 6 is a perspective view showing a coupled state of the voice coil motor according to the first preferred embodiment of the present invention. FIG.
FIG. 7 is an enlarged perspective view showing a coupled state of a voice coil motor according to a first preferred embodiment of the present invention; FIG.
FIG. 8 is a side cross-sectional view showing a coupled state of the voice coil motor according to the first preferred embodiment of the present invention. FIG.
9A is a graph showing driving characteristics of a conventional voice coil motor.
FIG. 9B is a graph showing driving characteristics of the voice coil motor according to the first preferred embodiment of the present invention. FIG.
10A is a graph showing settling time experimental data of an unused conventional voice coil motor of the present invention.
FIG. 10B is a graph showing settling time experimental data of the voice coil motor according to the first preferred embodiment of the present invention. FIG.
11 is an exploded perspective view showing a configuration of a voice coil motor according to a second preferred embodiment of the present invention.
FIG. 12 is an exploded perspective view showing a second elastic body, a base member, and damping portions in the configuration of a voice coil motor according to a second preferred embodiment of the present invention. FIG.
FIG. 13 is a side cross-sectional view showing a coupled state of a voice coil motor according to a second preferred embodiment of the present invention. FIG.
14 is an exploded perspective view showing a configuration of a voice coil motor according to a third preferred embodiment of the present invention.
FIG. 15 is a side cross-sectional view showing a coupled state of a voice coil motor according to a third preferred embodiment of the present invention. FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, a detailed description of the configuration is omitted in order to avoid obscuring the gist of the present invention.

[First Embodiment]

3 and 4 are views showing the configuration of a voice coil motor according to a first embodiment of the present invention.

The configuration of the voice coil motor 100 will be described with reference to FIG. The voice coil motor 100 includes a base member 110, a cover housing 140, first and second elastic members 150 and 160, and at least one damping unit 170. The base member 110 includes a carrier 120 having a lens housing 121 including a lens and a driving unit 130 driving the carrier unit 120 to move up and down in the optical axis A1 direction. . The cover housing 140 is coupled to the base member 110 to protect and receive the carrier 120, the driving unit 130, and the first and second elastic members 150 and 160 do. The first elastic body 150 is provided between the cover housing 140 and the carrier unit 120 to provide an elastic force to move the carrier unit 120 upward and downward. The second elastic body 160 is provided between the carrier part 120 and the base member 110 to provide an elastic force to drive the carrier part 120 up and down. The damping portions 170 may contact the first and second elastic bodies 150 and 160 to absorb vibrations between the second elastic body 160 and the base member 110 or between the cover housing 140 and the second elastic body 160. [ And is disposed between the first elastic bodies 150.

4 and 5, the damping portions 170 include first and second damping portions 170, and the first damping portions 171 are formed in contact with the first elastic body 150, And the second damping portion 172 is provided between the lower portion of the cover housing 140 and the upper portion of the first elastic body 150 so as to absorb the vibration of the first elastic body 150, Is provided between the upper portion of the base member 110 and the lower portion of the second elastic body 160 to absorb the vibration of the second elastic body 160 at the same time as the contact of the first elastic body 160.

The shape of the damping part 170 may be circular, elliptical or quadrangular, and the shape of the damping part 170 may be other than circular, elliptical and quadrangular. )

The damping part 170 may be made of silicone or urethane, and the damping part 170 may be made of silicone or urethane.

6 and 7, it is preferable that the base member 110 is provided with at least one application portion 180 so that the damping portions 170 can be coated and attached to the base member 110.

The cover housing 140 may be integrally formed with the yoke 131 of the driving unit 130 or may be formed with a spacer (not shown). The cover housing 140 may include a spacer . When the cover housing 140 functions as a spacer, the cover housing 140 may include a first elastic body 150 and a yoke 131 or a base member 110 and a second elastic body 160 So that the carrier part 120 is supported by the driving part 130 so that the carrier part 120 can be driven upward and downward.

In addition, a step (not shown) may be formed around the top opening of the cover housing 140 when the cover 130 is integrally formed with the yoke 131 of the driving unit 130.

3, the driving unit 130 includes a yoke 131, a plurality of magnetic bodies 132, and a yoke 132. The yokes 131 and 132, 133). The yoke 131 and the magnetic bodies 132 are provided on the base member 110 so as to face the coil part 133 described later. The coil part 133 is adapted to drive the carrier part 120 according to application of a power supply corresponding to the magnetic bodies 132.

That is, the yoke 131 is provided around the base member 110 and around the base member 110, and the magnetic bodies 132 are equally provided in the yoke 131.

Referring to FIGS. 3 to 5, the assembling process of the voice coil motor will be described in more detail. First, the lens housing 121 including the lens 121a is mounted on the carrier 120 120). In this state, the carrier portion 120 is coupled to the upper portion of the base member 110. At this time, the first elastic body 150 is provided on the carrier part 120. In this state, the carrier part 120 is coupled with the coil part 131, and the magnetic part 132 is provided so as to face the coil part 133. A second elastic body 160 is provided below the carrier 120 and a cover housing 140 is provided on the first elastic body 150.

8, when the power is applied to the coil part 133, the operation of the driving part 130 of the voice coil motor 100 will be described. The electric field generated by the coil part 133 and the magnetic field of the magnetic body 132 cooperate with each other so that the carrier part 120 having the lens housing 121 is moved along the optical axis A1 ) Direction.

At this time, the first and second elastic bodies 150 and 160 provide an elastic force such that the carrier part 120 can be driven to move upward and downward in the direction of the optical axis A1.

That is, when the carrier 120 is driven in both upward and downward directions, the lens 121a of the lens housing 121 is also driven upward and downward.

8, the first and second elastic bodies 150 and 160 are provided on the upper and lower surfaces of the first and second elastic bodies 150 and 160 so as to absorb the vibration, The damping portions 170 absorb the elastic force of the first and second elastic members 150 and 160 in both the upward and downward directions. That is, according to the operation of the driving unit 130, the first and second elastic members 150 and 160 are flexed in both upward and downward directions, and an elastic force is generated. At this time, the damping portions 170 absorb the bending of the first and second elastic bodies 150 and 160 as they are in contact.

1, the conventional voice motor coil 10 (shown in Fig. 1, when the lens is driven up and down by the driving part 13 (shown in Fig. 1)) vibrates the elastic bodies 15a, b It takes a lot of time to locate the initial focus position of the deep-sea lens 13a (shown in FIG. 2), and it is necessary to set the initial focus position of the lens at the initial focus position and the long- A large amount of electric power is required, which makes it impossible to perform high-speed start-up of the lens.

In order to solve such a disadvantage, the present invention forms at least one damping part 170 which absorbs vibration by contacting with the first and second elastic bodies 150 and 160, The first and second elastic bodies 150 and 160 are absorbed by the vibration of the first and second elastic members 150 and 160, thereby shortening the long focus adjustment time required for the initial focus position of the lens.

In addition, in the conventional voice motor coil 10 (shown in FIG. 1), when the lens driving in the direction of the optical axis is supported only by the upper and lower elastic members, the settling time of the lens is increased. That is, when the settling time of the lens is increased, the time for stabilizing the lens at the focus position is increased due to the returning force of the elasticity of the elastic body. As a result, There was a disadvantage that shooting was not performed.

In order to solve such a disadvantage, the damping unit 170 (shown in FIG. 3) of the present invention places the lens at a close distance (close distance) with the initial focus position of the lens when driving up and down, In addition to reducing the initial power consumption of the product in order to align the position, it is possible to shorten the photographing time of the user, continuous shooting and high speed shooting by enabling the high-speed start of the lens.

9A is a graph illustrating driving characteristics of a conventional voice coil motor. FIG. 9B is a graph illustrating a driving characteristic of a conventional voice coil motor according to a first embodiment of the present invention. FIG. 2 is a graph showing driving characteristics of a voice coil motor according to the present invention. FIG.

That is, the driving characteristic of the conventional voice coil motor 10 (shown in FIG. 1) is shown in a graph of FIG. 9A. That is, in order to move to the initial focus position of the lens, not only a current amount equal to or higher than a preload is required, but also a long focus adjustment time is required.

On the other hand, the voice coil motor 100 (shown in FIG. 3) applied to the present invention moves to the initial focus position of the lens 121a (shown in FIG. 8) Therefore, it is possible to reduce the power consumption of the battery (not shown) of the product and increase the use time of the battery. In addition, since the initial position of the lens is adjusted to the general camera photographing position, not only the movement to the initial focus position of the lens can be performed quickly and easily, but also the high-speed start is possible.

The settling time of the lens will be described in more detail as follows.

FIG. 10A is a graph showing settling time experimental data of a conventional voice coil motor in which the damping units according to the present invention are not used. FIG. 10B is a graph showing settling time experimental data of a voice coil motor according to the first embodiment of the present invention Settling Time) experimental data.

As shown in FIG. 10A, the settling time of the conventional lens 13a (shown in FIG. 2) depends on the inertia generated when the lens is moved, the upward force of the continuously applied magnetic field, and the elasticity of the elastic body The focus position of the lens is shown unstably. In other words, as shown in the graph of FIG. 10A, if the settling time of the conventional lens 13a (shown in FIG. 2) becomes long, the disadvantage that continuous shooting and high speed shooting can not be performed in proportion to the focusing time of the lens there was.

On the other hand, in the voice coil motor using the damping parts 170 of the present invention, as shown in the graph of FIG. 10B, the settling time of the lens 121a (shown in FIG. 8) As shown in Fig.

Therefore, the settling time of the lens 121a can be shortened, thereby enabling continuous shooting and high-speed shooting of the product, as well as improving the use of the product.

[Second Embodiment]

11 and 12 are views showing the configuration of a voice coil motor according to a second embodiment of the present invention.

The configuration of the voice coil motor will be described with reference to Figs. 11 and 12. Fig. The voice coil motor 200 includes a base member 210, a cover housing 240, first and second elastic members 250 and 260, and at least one damping unit 270. The base member 210 includes a carrier portion 220 having a lens housing 221 including a lens 221a and a driving portion 230 for driving the carrier portion 220 in the optical axis A1 direction As shown in Fig. The cover housing 240 is coupled to the base member 210 to protect and receive the carrier 220, the driving unit 230, and the first and second elastic members 250 and 260 do. The first elastic body 250 is provided between the cover housing 240 and the carrier 220 to provide an elastic force to move the carrier 220 up and down. The second elastic body 260 is provided between the carrier 220 and the base member 210 to provide an elastic force to move the carrier 220 up and down. The damping portions 270 are provided on the upper portion 210 of the base member and the lower portion of the second elastic body 260 so as to absorb the vibration in contact with the second elastic bodies 260.

12, the damping portions 270 may be formed on the upper portion of the base member 210 and the second elastic member 260 so as to absorb the vibration of the second elastic body 260, And is disposed between the lower portion of the elastic body 260.

The shape of the damping portion 270 may be circular, elliptical or quadrangular. The shape of the damping portion 270 may be other than circular, elliptical, and quadrangular shapes. (See, for example, rhombus and triangle Etc)

The damping part 270 may be made of silicone or urethane, and the damping part 270 may be made of silicone or urethane.

In addition, the base member 210 may be provided with at least one application unit 280 so that the damping units 270 can be applied and placed thereon.

The cover housing 240 may be integrally formed with the yoke 231 of the driving unit 230 or may be formed of a spacer (not shown). The cover housing 140 may include a spacer . The cover housing 240 is inserted between the first elastic body 250 and the yoke 331 or between the base member 210 and the second elastic body 260 when the cover housing serves as a spacer. And the carrier unit 220 is supported by the driving unit 230 so as to be movable up and down.

In addition, a step (not shown) may be formed around the upper opening of the cover housing 240 when the cover 230 is integrally formed with the yoke of the driving unit 230.

11, the driving unit 230 includes a yoke 231, a plurality of magnetic members 232, a coil portion (not shown) 233). The yoke 231 and the magnetic bodies 232 are provided on the base member 210 so as to face a coil portion 233 described later. The coil part 233 is adapted to drive the carrier part 220 according to application of a power supply corresponding to the magnetic bodies 232.

That is, the yoke 231 is provided around the outer circumference of the base member 210 and the magnetic members are equally provided in the yoke 231.

Referring to FIGS. 11 and 12, the assembling process of the voice coil motor will be described in more detail. First, as shown in FIG. 11, the lens housing 221 including the lens 221a 221). In this state, the carrier unit 220 is coupled to the upper portion of the base member 210. At this time, a second elastic body 260 is provided under the carrier part 220. A coil portion 233 is coupled to the carrier portion 220, and a magnetic body is provided so as to face the coil portion. A first elastic body 250 is provided on the carrier 220 and a cover housing 240 is provided on the first elastic body 250.

13, when the power is applied to the coil part 233, the operation of the driving part 230 of the voice coil motor 200 is completed. The electric field generated by the coil part 233 and the magnetic field of the magnetic body 232 interact with each other to cause the carrier part 220 having the lens housing 221 to move along the optical axis A1 ) Direction.

At this time, the first and second elastic bodies 250 and 260 provide an elastic force such that the carrier part 220 can be driven to move upward and downward in the direction of the optical axis A1.

That is, when the carrier unit 220 is driven in both upward and downward directions, the lens 221a of the lens housing 221 is also driven in both upward and downward directions.

13, at least one damping part 270 is provided on the lower part of the second elastic body 260 so as to be in contact with the second elastic body 260 to absorb the vibration. Therefore, The damping parts 270 absorb the elastic force of the upper and lower directions of the second elastic body 260.

That is, the second elastic body 260 is flexed in both upward and downward directions according to the operation of the driving unit 230, and elastic force is generated. At this time, the damping parts 270 absorb the bending of the second elastic body 260 according to the contact.

13, the damping portions 270 may be formed of at least one damping portion 270 that absorbs vibration by contacting the second elastic bodies 260, And absorbs the vibration of the second elastic bodies 260 during the downward movement, thereby shortening the long focus adjustment time required for the initial focus position of the lens.

The damping portions 270 of the present invention are arranged such that the lens 221a (shown in FIG. 8) is positioned close to the initial focus position of the lens when driving up and down, It is possible not only to reduce the initial power consumption of the product for aligning the lens, but also to enable the high-speed start of the lens, thereby shortening the photographing time of the user, continuous shooting and high speed shooting.

The graph showing the driving characteristics of the voice coil motor according to the present invention is the same as that of FIG.

The settling time of the lens 221a (shown in FIG. 8) is also the same as that of FIGS. 10a and 10b.

[Third Embodiment]

14 is a diagram showing a configuration of a voice coil motor according to a third embodiment of the present invention.

The configuration of the voice coil motor will be described with reference to Fig. The voice coil motor 300 includes a base member 310, a cover housing 340, first and second elastic members 350 and 360, and at least one damping unit 370. The base member 310 includes a carrier portion 320 having a lens housing 321 including a lens 321a and a driving portion 330 for driving the carrier portion 320 up and down in the optical axis A1 direction As shown in Fig. The cover housing 340 is coupled to the base member 310 to protect and receive the carrier 320, the driving unit 330, and the first and second elastic members 350 and 360 do. The first elastic body 350 is provided between the cover housing 340 and the carrier part 320 to provide an elastic force to drive the carrier part 320 upward and downward. The second elastic body 360 is provided between the carrier part 320 and the base member 310 to provide an elastic force to drive the carrier part 320 up and down. The damping portions 370 are provided on the lower portion of the cover housing 340 and the upper portion of the first elastic body 350 so as to absorb vibration in contact with the first elastic bodies 350.

That is, as shown in FIG. 15, the damping portions 370 are formed in the lower portion of the cover housing 340 and the first and second elastic bodies 350 and 350 so as to absorb the vibration of the first elastic body 350, And is provided between the upper portion of the elastic body 350.

The shape of the damping portion 370 may be circular, elliptical or quadrangular, and the shape of the damping portion 370 may be other than circular, elliptical, and quadrangular. )

The damping unit 370 may be made of silicone or urethane, and the damping unit 370 may be made of silicone or urethane.

The cover housing 340 may be integrally formed with the yoke 331 provided in the driving unit 330 or may be formed with a spacer (not shown), and the cover housing 140 may include a spacer . When the cover housing 340 functions as a spacer, the cover housing 340 may include a first elastic body 350 and a yoke 331 or a base member 310 and a second elastic body 360 And the carrier part 320 is supported by the driving part 330 so as to be movable up and down.

In addition, a step (not shown) may be formed around the top opening of the cover housing 340 when the cover 330 is integrally formed with the yoke 331 of the driving unit 330.

14, the driving unit 330 includes a yoke 331, a plurality of magnetic bodies 332, and a coil part 333, . The yoke 331 and the magnetic bodies 332 are provided on the base member 310 so as to face a coil portion 333 described later. The coil part 333 is adapted to drive the carrier part 320 according to application of a power supply corresponding to the magnetic bodies 332.

That is, the yoke 331 is provided around the base member 310 and around the base member 310, and the magnetic bodies 332 are equally provided in the yoke 331.

Referring to FIGS. 14 and 15, the assembling process of the voice coil motor will be described in more detail. Referring to FIG. 14, a lens housing (not shown) including a lens 321a 321). In this state, the carrier portion 320 is coupled to the upper portion of the base member 310. At this time, a second elastic body 360 is provided under the carrier part 320. In this state, the coil portion 333 is coupled to the carrier portion 320, and the magnetic substance 332 is provided so as to face the coil portion 333. A first elastic body 350 is provided on the carrier 320 and a cover housing 340 is provided on the first elastic body 350.

15, an operation process of the driving unit 330 provided in the voice coil motor 300 (shown in FIG. 14) in a state where the assembly is completed will be described. First, power is supplied to the coil part 333 The coil part 333 generates an electric field and the electric field generated by the coil part 333 and the magnetic field of the magnetic body 332 interact with each other to move the carrier part 320 having the lens housing 321 ) In both the upward and downward directions in the direction of the optical axis A1.

At this time, the first and second elastic bodies 350 (360) provide an elastic force such that the carrier portion 320 can be driven to move upward and downward in the optical axis direction.

That is, when the carrier section 320 is driven in both upward and downward directions, the lens 321a of the lens housing 321 is also driven in both upward and downward directions.

15, the upper portion of the first elastic body 350 is provided with at least one damping portion 370 for absorbing vibration by contacting the first elastic bodies 350. Therefore, the damping portion 370 absorb the elastic force of both the upward and downward directions of the first elastic body 350. That is, the first elastic body 350 is biased upward and downward according to the operation of the driving unit 330, and elastic force is generated. At this time, the damping portions 370 absorb the bending of the first elastic body 350 according to the contact.

As described above, the present invention provides at least one damping portion 370 that absorbs vibration by contacting with the first elastic bodies 350, so that the damping portions 270 can move the lens 321a (shown in FIG. 15) It is possible to absorb the vibration of the first elastic bodies 350 during the upward and downward driving and to shorten the long focusing time which is required for positioning the initial focus position of the lens.

Further, the damping portions 370 of the present invention position the lens 321a (shown in FIG. 15) close to the initial focus position of the lens 321a (shown in FIG. 15) Thus, not only the initial power consumption of the product for adjusting the initial focus position of the lens is reduced but also the high-speed start of the lens is possible, thereby shortening the photographing time of the user, continuous shooting and high speed shooting.

In addition, the graph showing the driving characteristics of the voice coil motor 300 (shown in FIG. 14) to which the present invention is applied is the same as that of FIG.

In addition, the settling time of the lens is also omitted in the same manner as in FIGS. 10A and 10B.

The voice coil motors 100, 200, and 300 (shown in FIGS. 3, 9, and 14) according to the embodiments of the present invention are applicable to a camera lens module of a portable communication device. However, the present invention is not limited to the camera lens module of the portable communication device, and can be applied to various types of terminals that can include a camera lens assembly

Examples of the various types of terminals according to the embodiment of the present invention include all mobile communication terminals operating based on communication protocols corresponding to various communication systems, Portable Multimedia Player), Navigation, Game Machine, Digital Camera, Notebook, Billboard, TV, Digital Broadcast Player, PDA (Personal Digital Assistant), Smart Phone and Multimedia Device and its Application Device.

The above-described voice coil motor of the present invention is not limited to the above-described embodiments and drawings, and various substitutions, modifications, and changes may be made within the technical scope of the present invention. It will be clear to those who have.

Base member: 110, 210. 310 Cover housing: 140, 240, 340
First and second elastomers: 150, 160, 250, 260, 350, 360
Damping portions 170, 270 and 370, a lens housing; 121, 221, 321
A lens; 121a, 221a, 321a

Claims (20)

In the voice coil motor,
A base member for accommodating a carrier portion having a lens housing and a driving portion for driving the carrier portion in an optical axis direction;
A cover housing coupled to the base member; And
And at least one elastic body provided in the cover housing to provide an elastic force to be able to drive the carrier part up and down,
Wherein at least one damping portion is provided between the elastic members and the base member, or between the cover housing and the elastic members, or both.
In the voice coil motor,
A base member for accommodating a carrier portion having a lens housing and a driving portion for driving the carrier portion in an optical axis direction;
A cover housing coupled to the base member; And
And first and second elastic members provided in the cover housing to provide an elastic force to be able to drive the carrier part up and down,
Wherein at least one damping portion is provided between a lower portion of the cover housing and an upper portion of the first elastic body or between an upper portion of the base member and a lower portion of the second elastic body.
The voice coil motor according to claim 2, wherein the damping portion has a circular shape, an ellipse shape, and a quadrangle shape.
The voice coil motor according to claim 2, wherein the damping portion is made of silicon or urethane.
The damping device according to claim 2, wherein the damping portion comprises first and second damping portions,
Wherein the first damper portion is provided between the lower portion of the cover housing and the upper portion of the first elastic body and the second damming portion is provided between the upper portion of the base member and the lower portion of the second elastic body. Coil motor.
[3] The voice coil motor according to claim 2, wherein the base member is provided with at least one application portion for applying and seating the damping portions.
The voice coil motor according to claim 2, wherein the cover housing is integrally formed with the yoke of the driving unit.

The voice coil motor according to claim 2, wherein the cover housing is formed of a spacer or integral with the spacer.
In the voice coil motor,
A base member for accommodating a carrier portion having a lens housing and a driving portion for driving the carrier portion in an optical axis direction;
A cover housing coupled to the base member; And
And first and second elastic members provided in the cover housing to provide an elastic force to be able to drive the carrier part up and down,
Wherein at least one damping portion is provided between an upper portion of the base member and a lower portion of the second elastic body.
The voice coil motor according to claim 9, wherein the damping portion has a circular or oval shape.
The voice coil motor according to claim 9, wherein the damping portion is made of silicon or urethane.
10. The voice coil motor according to claim 9, wherein the base member is provided with at least one application portion for applying and seating the damping portions.
10. The voice coil motor according to claim 9, wherein the cover housing is integrally formed with the yoke of the driving unit.
10. The voice coil motor according to claim 9, wherein the cover housing is formed of a spacer or integral with the spacer.
In the voice coil motor,
A base member for accommodating a carrier portion having a lens housing and a driving portion for driving the carrier portion in an optical axis direction;
A cover housing coupled to the base member; And
And first and second elastic members provided in the cover housing to provide an elastic force to be able to drive the carrier part up and down,
Wherein at least one damping portion is provided between a lower portion of the cover housing and an upper portion of the first elastic body.
16. The voice coil motor according to claim 15, wherein the damping portion has a circular or oval shape.
16. The voice coil motor according to claim 15, wherein the material of the damping portion is made of silicon or urethane.
16. The voice coil motor according to claim 15, wherein the damper portions are provided between a lower portion of the cover housing and an upper portion of the first elastic body.
16. The voice coil motor according to claim 15, wherein the cover housing is integrally formed with the yoke of the driving unit.
16. The voice coil motor according to claim 15, wherein the cover housing is made of a spacer or integral with the spacer.

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