KR101668605B1 - Camera actuator for portable device - Google Patents

Camera actuator for portable device Download PDF

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Publication number
KR101668605B1
KR101668605B1 KR1020140033399A KR20140033399A KR101668605B1 KR 101668605 B1 KR101668605 B1 KR 101668605B1 KR 1020140033399 A KR1020140033399 A KR 1020140033399A KR 20140033399 A KR20140033399 A KR 20140033399A KR 101668605 B1 KR101668605 B1 KR 101668605B1
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KR
South Korea
Prior art keywords
magnet
moving
coil
optical axis
camera
Prior art date
Application number
KR1020140033399A
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Korean (ko)
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KR20150109894A (en
Inventor
박창욱
Original Assignee
주식회사 하이소닉
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority to KR1020140033399A priority Critical patent/KR101668605B1/en
Priority to PCT/KR2015/000951 priority patent/WO2015141943A1/en
Publication of KR20150109894A publication Critical patent/KR20150109894A/en
Application granted granted Critical
Publication of KR101668605B1 publication Critical patent/KR101668605B1/en

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B5/02—Lateral adjustment of lens
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B2205/0007—Movement of one or more optical elements for control of motion blur
    • G03B2205/0015—Movement of one or more optical elements for control of motion blur by displacing one or more optical elements normal to the optical axis
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B2205/0053—Driving means for the movement of one or more optical element
    • G03B2205/0069—Driving means for the movement of one or more optical element using electromagnetic actuators, e.g. voice coils

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Adjustment Of Camera Lenses (AREA)
  • Studio Devices (AREA)

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera actuator for a portable terminal, and more particularly, to a camera actuator for a portable terminal including a camera shake correction function for correcting camera shake by moving a lens in a direction perpendicular to a lens optical axis.
According to another aspect of the present invention, there is provided a camera actuator for a portable terminal comprising: a fixing part mounted on a portable terminal; A first moving part disposed inside the fixing part and moving in a direction perpendicular to the optical axis; A plurality of magnets mounted on the first moving unit; And a plurality of first coils that are mounted on the fixed portion to correspond to the respective magnets and wound around a correction space into which the magnets can be inserted, and when a current flows through the first coils, The magnet is inserted into the correction space of the first coil facing the magnet.

Description

The present invention relates to a camera actuator for portable devices,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera actuator for a portable terminal, and more particularly, to a camera actuator for a portable terminal including a camera shake correction function for correcting camera shake by moving a lens in a direction perpendicular to a lens optical axis.

2. Description of the Related Art [0002] Portable terminals such as smart phones are widely used, and various functions can be implemented.

Among them, the camera function is essentially installed in a portable terminal, and it is possible to take a high-quality photograph that is not inferior to a general camera.

Further, according to the improvement of the performance of the camera mounted on the portable terminal, it is possible to take a picture conveniently using the portable terminal.

In order to realize such a camera function, a voice coil motor is mounted in the portable terminal, which can adjust the gap between the lens and the image sensor or correct the camera shake.

Japanese Patent Laid-Open Publication No. 10-2012-0078915 discloses a multi-function voice coil motor which is a camera actuator mounted on a portable terminal.

1 is a longitudinal sectional view of a conventional camera actuator.

The conventional camera actuator includes a lens housing unit 100 for lifting and lowering the lens housing therein; A fixed unit 200 fixed around the outer surface of the lens housing unit 100; And an outer side surface of the lens housing unit 100 and an inner side surface of the fixed unit 200. The lens housing unit 100 is mounted on the inner side of the lens housing unit 100, And a drive unit (300) for tilting the lens housing unit (100) to correct the shake.

The driving unit 300 includes a plurality of magnets 310 disposed on an outer surface of the lens housing unit 100 and a plurality of magnets 310 disposed on an inner surface of the fixed unit 200 to face the magnets 310. [ And a coil block 320 disposed on the coil block 320.

In such a conventional camera actuator, when the camera shake occurs, the lens housing unit on which the magnet is mounted moves back and forth in the direction of the coil block to correct the shake.

However, the conventional camera actuator requires a working space in which the lens housing unit can be driven between the fixed unit and the lens housing unit in order to correct the camera shake, i.e., the shaking motion.

The operating space increases the thickness of the actuator including the fixed unit and the housing unit, thereby increasing the overall size of the actuator, thereby making it difficult to miniaturize the actuator.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a camera actuator for a portable terminal which can easily secure an internal space excluding an operation space for correction of camera shake while keeping the overall size small.

According to an aspect of the present invention, there is provided a camera actuator for a portable terminal, the camera actuator including a camera shake correction function for correcting camera shake by moving a lens in a vertical direction of a lens optical axis, the camera actuator comprising: A first moving part disposed inside the fixing part and moving in a direction perpendicular to the optical axis; A plurality of magnets mounted on the first moving unit; And a plurality of first coils that are mounted on the fixed portion to correspond to the respective magnets and wound around a correction space into which the magnets can be inserted, and when a current flows through the first coils, Any one of the magnets is inserted into the correction space of the first coil facing the magnet.

The magnet is formed as a single pole and is polarized in a direction perpendicular to the optical axis.

The magnet may include a first magnet polarized in the vertical direction of the optical axis and a second magnet formed in the upper and lower portions of the first magnet and polarized in the opposite direction to the first magnet, .

Further, the camera actuator for a portable terminal of the present invention may further include a focus adjusting unit for adjusting a focus of the camera by moving the lens in the optical axis direction, wherein the focus adjusting unit includes: And a second coil mounted on an outer circumferential surface of the second moving part and positioned in a magnetic field formed by the magnet.

The second coil is composed of an upper coil and a lower coil arranged up and down.

The camera actuator for a portable terminal according to the present invention has the following effects.

The magnet mounted on the first moving part moving in the vertical direction of the lens optical axis is inserted into the correction space formed at the coil winding center in the camera shake correction so that the first moving part and the second moving part for camera- It is possible to easily install and assemble the parts and increase the size of the parts that can be installed, because the internal space excluding the operation space can be easily secured while keeping the overall size small.

As the size of components that can be installed in the camera actuator of such a limited size is increased, it is easy to implement a high-performance small-sized camera.

In addition, by using a single-pole magnet, the manufacturing cost of the actuator can be reduced while generating sufficient driving force for camera shake correction and focus adjustment.

1 is a longitudinal sectional view of a conventional camera actuator.
2 is a perspective view of a camera actuator for a portable terminal according to a first embodiment of the present invention;
3 is an exploded perspective view of a camera actuator for a portable terminal according to a first embodiment of the present invention;
4 is a vertical cross-sectional view taken along the line AA in Fig.
Fig. 5 is an exploded perspective view of the portion B in Fig.
6 is a longitudinal sectional view of a camera actuator for a portable terminal according to a second embodiment of the present invention.

The present invention relates to a camera actuator including an image stabilization function for correcting camera shake by moving a lens in a direction perpendicular to a lens optical axis.

FIG. 2 is a perspective view of a camera actuator for a portable terminal according to a first embodiment of the present invention, FIG. 3 is an exploded perspective view of a camera actuator for a portable terminal according to the first embodiment of the present invention, 4 (b) is a view showing a state in which the first moving part is moved in Fig. 4 (a), Fig. 5 is an exploded perspective view in which B part of Fig. 3 is separately exploded, Which are mounted on a first moving part, a second moving part, a first moving part, and a second moving part excluding the fixing part.

Hereinafter, a camera actuator for a portable terminal of the present invention will be described in detail with reference to the accompanying drawings.

First Embodiment

2 to 5, the camera actuator for a portable terminal according to the first embodiment of the present invention includes a fixing part 10, a first moving part 20, a magnet 30, a first coil 40 A second moving part 50, and a second coil 60. [

The fixing portion 10 is mounted on the portable terminal and forms the outer shape of the actuator as shown in Fig.

3, the fixing unit 10 includes a base 11 mounted on the portable terminal, a first moving unit 20 and a second moving unit 50 mounted on the base 11, And a spacer 13 mounted on an inner upper surface of the cover 12. The cover 12 has a substantially rectangular shape.

A space in which the first moving part 20 and the second moving part 50 are disposed is formed between the base 11 and the spacer 13.

The first moving part 20 is disposed inside the fixing part 10 and moves in the vertical direction (x-axis direction or y-axis direction) of the lens optical axis.

The first moving part 20 is disposed between the base 11 and the spacer 13 by being spaced from the upper part of the base 11 by the first suspension member 21.

3, the first suspension member 21 is formed into a spiral-wound coil spring shape so that the upper end thereof is mounted on the spacer 13 and the lower end thereof is mounted on the first moving part 20. [

Since the first suspension member 21 is formed in a coil spring shape, the shape of the first suspension member 21 can be easily deformed and restored, the first moving member 20 can be easily moved, and the shock resistance is excellent.

On the other hand, according to the embodiment, the first suspension member 21 may be a linear wire.

The magnet 30 is mounted to the first moving part 20 as shown in Figs.

Specifically, the magnet 30 is formed as a single pole as shown in FIG. 4 and is polarized in a direction perpendicular to the optical axis.

That is, the magnet 30 is polarized so that the outer side adjacent to the first coil 40 and the inner side adjacent to the second coil 60 have different polarities.

As shown in FIG. 5, four magnets 30 are mounted on the side of the first moving part 20 in the front, back, left and right directions.

Each of the magnets 30 protrudes from the outer surface of the first moving part 20. [

In other words, the thickness of the first moving part 20 is formed thinner than the thickness of the magnet 30.

As described above, by using the single-pole magnet 30, the manufacturing cost of the actuator can be reduced while generating sufficient driving force for camera shake correction and focus adjustment of the camera.

The first coil 40 is mounted on the fixed portion 10 so as to correspond to each magnet 30 and is wound around the correction space 41 into which the magnet 30 can be inserted .

4, a circuit board 42 is mounted on the inner surface of the cover 12, and four first coils 40 are mounted on a circuit board (not shown) mounted on the inner surface of the cover 12 And a magnet 30 corresponding to one of the four first coils 40 corresponds to each of the magnets 30 mounted on the center of the first coil 40, In the correction space 41 formed in the main body 41.

The magnet 30 may be inserted into the correction space 41 formed at the center of the first coil 40 in the pair of first coils 40 and the magnet 30 corresponding to each other .

An electromagnetic force is generated when a current flows through the first coil 40 to correct the camera shake, and the electromagnetic force becomes a driving force for moving the first moving part 20 in the vertical direction of the optical axis. One of the magnets 30 of the plurality of magnets 30 faces the magnet 30 in accordance with the moving direction of the first moving part 20 by the driving force, The correction space 41 is formed.

On the other hand, a hall sensor 43 (hall sensor) is mounted on the circuit board 42 to detect a change in the position of the magnet 30.

The hall sensor 43 is disposed on the top of the magnet 30 to provide feedback information on the position of the first moving part 20 moving to correct the camera shake.

The second moving part 50 is mounted inside the lens (not shown) and is coupled to the first moving part 20 to move in the optical axis direction (z-axis direction) of the lens.

The second moving part 50 is supported by the second suspension member 51 so as to be movable in the optical axis direction of the lens as shown in Fig.

That is, the second suspension member 51 is a leaf spring, one end of which is mounted on the first moving part 20 and the other end is mounted on the second moving part 50 to support the second moving part 50.

The second suspension member 51 may be formed in various shapes according to the embodiment.

The second coil 60 is placed in the magnetic field formed by the magnet 30 mounted on the outer peripheral surface of the second moving part 50.

Accordingly, when a current flows through the second coil 60, an electromagnetic force is generated, and the electromagnetic force becomes a driving force for moving the second moving part 50 in the optical axis direction.

Hereinafter, an operation method of a camera actuator for a portable terminal according to a first embodiment of the present invention will be described.

The first moving part 20 is positioned very close to the first coil 40 so that the magnet 30 is not inserted into the correction space 41 in the initial state where no current flows in the first coil 40. [

If a camera shake occurs due to camera shake, a current flows through the first coil 40, and the magnet 30, which forms a magnetic field around the first coil 40, and the first coil 40 through which current flows, A driving force for correcting the camera-shake is generated.

The first moving part 20 moves in the direction perpendicular to the optical axis of the lens by the driving force and when the first moving part 20 moves in the vertical direction of the optical axis of the lens, The magnet 30 is inserted into the correction space 41 formed at the center of the first coil 40. [

The front, rear, and left and right directions described above are based on the drawings for the sake of convenience of description, and may vary depending on the use state of the portable terminal equipped with the camera actuator or the direction in which the camera actuator is viewed.

As described above, when correcting the camera shake, the magnet 30 mounted on the first moving part 20 moving in the vertical direction of the lens optical axis is inserted into the correction space 41 formed at the winding center of the coil, It is possible to minimize the working space between the first moving part 20 and the second moving part 50 for correcting the shaking motion and to secure the inside space excluding the operating space while keeping the overall size of the actuator small, It is easy to assemble and can increase the size of installable parts.

When a current flows through the second coil 60, a driving force for adjusting the focus is generated by the magnet 30 and the second coil 60, which form a magnetic field around the second coil 60, The second moving portion 50 is moved in the optical axis direction of the lens by the driving force.

Second Example

The camera actuator for a portable terminal according to the second embodiment mainly focuses on bar magnets having different magnets as compared with the first embodiment.

6 (a) is a longitudinal sectional view of a camera actuator for a portable terminal according to a second embodiment of the present invention, and FIG. 6 (b) shows a state in which a second coil different from that of FIG. 6 Fig. 2 is a longitudinal sectional view of a camera actuator for a portable terminal.

A camera actuator for a portable terminal according to a second embodiment of the present invention includes a fixing part 10, a first moving part 20, a magnet 30, a first coil 40, a second moving part 50, And a second coil 60.

The fixing part 10, the first moving part 20 and the first coil 40 are the same as those in the first embodiment, and a detailed description thereof will be omitted.

The magnet 30 is mounted on the first moving part 20 and comprises a first magnet 30a and a second magnet 30b.

The first magnet 30a is polarized in the direction perpendicular to the optical axis of the lens as shown in Fig. 6 (a).

That is, the first magnet 30a is polarized so that the outer side adjacent to the first coil 40 and the inner side adjacent to the second coil 60 have different polarities.

The second magnet 30b is formed on the upper and lower sides of the first magnet 30a and is polarized in the opposite direction to the first magnet 30a.

On the other hand, the second coil 60 is mounted on the outer circumferential surface of the second moving part 50 as in the first embodiment.

The second coil 60 may be composed of an upper coil 60a and a lower coil 60b which are vertically spaced apart as shown in FIG. 6 (b).

The structure of the magnet 30 and the coil according to the second embodiment is for increasing the driving force for correcting the camera shake or adjusting the focus. The manufacturing cost is increased as compared with the first embodiment, There is an advantage.

The same as the first embodiment except for the points described above.

The camera actuator for a portable terminal according to the present invention is not limited to the above-described embodiments, and various modifications may be made within the scope of the technical idea of the present invention.

10: fixing part, 11: base, 12: cover, 13: spacer,
20: first moving part, 21: first suspension member,
30: magnet, 30a: first magnet, 30b: second magnet,
40: first coil, 41: correction space, 42: circuit board, 43: hall sensor,
50: second moving part, 51: second suspension member,
60: second coil, 60a: upper coil, 60b: lower coil,

Claims (5)

A camera actuator including a camera shake correction function for correcting camera shake by moving a lens in a direction perpendicular to a lens optical axis,
A fixing unit including a base mounted on the portable terminal, a cover mounted on the base, and a spacer mounted on an inner upper surface of the cover, wherein a space is formed between the base and the spacer;
A first moving unit disposed in the space and moving in a direction perpendicular to the optical axis;
A first suspension member formed in a spiral wound coil spring shape and having a top mounted on the spacer and a bottom mounted on the first moving portion to separate the first moving portion from the base;
A plurality of magnets mounted on the first moving unit;
A circuit board mounted on an inner surface of the cover so as to surround the magnet;
And a plurality of first coils mounted on the circuit board to correspond to the respective magnets and wound around a correction space into which the magnets can be inserted,
And when a current flows through the first coil, any one of the magnets is inserted into the correction space of the first coil facing the magnet. The method according to claim 1,
Wherein the magnet is a single pole and is polarized in a direction perpendicular to the optical axis. The method according to claim 1,
The magnet
A first magnet polarized in a direction perpendicular to the optical axis,
And a second magnet formed on the upper and lower portions of the first magnet and polarized in the opposite direction to the first magnet. The method according to any one of claims 1 to 3,
And a focus adjusting unit for adjusting a focus of the camera by moving the lens in the optical axis direction,
Wherein the focus adjusting unit comprises:
A second moving unit mounted with the lens and coupled to the first moving unit and moving in the optical axis direction,
And a second coil mounted on an outer circumferential surface of the second moving part and positioned in a magnetic field formed by the magnet. The method of claim 4,
Wherein the second coil is composed of an upper coil and a lower coil which are vertically spaced apart from each other.
KR1020140033399A 2014-03-21 2014-03-21 Camera actuator for portable device KR101668605B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020140033399A KR101668605B1 (en) 2014-03-21 2014-03-21 Camera actuator for portable device
PCT/KR2015/000951 WO2015141943A1 (en) 2014-03-21 2015-01-29 Camera actuator for portable terminal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020140033399A KR101668605B1 (en) 2014-03-21 2014-03-21 Camera actuator for portable device

Publications (2)

Publication Number Publication Date
KR20150109894A KR20150109894A (en) 2015-10-02
KR101668605B1 true KR101668605B1 (en) 2016-10-25

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WO (1) WO2015141943A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109073957B (en) 2016-03-17 2021-03-16 Lg伊诺特有限公司 Lens moving device, camera module and optical apparatus including the same
US10082640B2 (en) 2016-05-24 2018-09-25 Microsoft Technology Licensing, Llc Dual stage actuator
KR102264881B1 (en) * 2019-11-08 2021-06-14 중앙대학교 산학협력단 Actuator for mobile terminal camera with dual msm elements and camera module for mobile terminal with same

Citations (4)

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Publication number Priority date Publication date Assignee Title
KR101017341B1 (en) 2009-11-06 2011-02-28 주식회사 하이소닉 Compact camera device
KR101069619B1 (en) 2010-06-16 2011-10-05 주식회사 하이소닉 Compact anti shake camera module
KR101200711B1 (en) 2011-02-24 2012-11-14 주식회사 하이소닉 Autofocusing and optical image stabilizing apparutus for camera, and the camera with the same
KR101204587B1 (en) 2010-10-29 2012-11-23 삼성전기주식회사 Image photographing device having function for compensation hand vibration

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011090064A (en) * 2009-10-20 2011-05-06 Shicoh Engineering Co Ltd Lens driving device, autofocus camera and cellular phone with camera
JP2011112709A (en) * 2009-11-24 2011-06-09 Shicoh Engineering Co Ltd Lens drive device, autofocus camera, and cellular phone having built-in camera
CN102870043B (en) * 2010-07-29 2015-07-08 日本电产科宝株式会社 Tilt-correction unit
JP5828660B2 (en) * 2011-04-11 2015-12-09 日本電産サンキョー株式会社 Optical unit with shake correction function

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101017341B1 (en) 2009-11-06 2011-02-28 주식회사 하이소닉 Compact camera device
KR101069619B1 (en) 2010-06-16 2011-10-05 주식회사 하이소닉 Compact anti shake camera module
KR101204587B1 (en) 2010-10-29 2012-11-23 삼성전기주식회사 Image photographing device having function for compensation hand vibration
KR101200711B1 (en) 2011-02-24 2012-11-14 주식회사 하이소닉 Autofocusing and optical image stabilizing apparutus for camera, and the camera with the same

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KR20150109894A (en) 2015-10-02
WO2015141943A1 (en) 2015-09-24

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