WO2009128463A1 - Lens actuator - Google Patents
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- WO2009128463A1 WO2009128463A1 PCT/JP2009/057548 JP2009057548W WO2009128463A1 WO 2009128463 A1 WO2009128463 A1 WO 2009128463A1 JP 2009057548 W JP2009057548 W JP 2009057548W WO 2009128463 A1 WO2009128463 A1 WO 2009128463A1
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- displacement
- lens
- lens actuator
- actuator
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/08—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted to co-operate with a remote control mechanism
Definitions
- ⁇ Lens actuators for cameras mounted on such mobile communication devices are roughly classified into those that drive a lens by expansion and contraction displacement of a piezoelectric element or the like and those that drive a lens by a lens barrel.
- Cited Document 1 Japanese Patent Application Laid-Open No. 2002-130114 (hereinafter referred to as Cited Document 1) has been filed as a structure for driving a lens by the above-described expansion and contraction displacement.
- the cited document 1 has a structure in which the shape memory alloy is provided obliquely with respect to the optical axis, and the lens is driven by taking out only the displacement in the optical axis direction from the expansion / contraction direction, and the distance between the imaging element and the lens is shortened. This makes it possible to reduce the size of the entire camera mechanism.
- Cited Document 2 Japanese Patent Application Laid-Open No. 2005-27496 (hereinafter referred to as Cited Document 2) has been filed as a structure using a lens barrel, and the lens barrel is moved in the optical axis direction by a magnetic force acting between a coil and a magnet. It is characterized by.
- Patent Document 1 since the lens holder is supported in parallel by an elastic member, the lens moves in a direction perpendicular to the optical axis when the lens is driven. It cannot be made constant, and the use efficiency of the image sensor becomes worse.
- the lens actuator described in the cited document 2 has a structure in which the lens barrel is housed, the moving range of the lens cannot be set large with respect to the thickness of the entire actuator, and it is difficult to form a thin structure. .
- an object of the present invention is to provide a lens actuator that is thin and does not easily shift the lens position with respect to the optical axis, and that can obtain a large displacement with respect to the displacement of the drive source.
- the piezoelectric element that is a driving source and the displacement-magnification mechanism that is connected to both ends thereof are annular And a structure in which both ends of the displacement magnifying mechanism are crossed is used.
- the lens actuator according to the present invention can convert the displacement of both ends of the piezoelectric element serving as a driving source into the vertical direction. For this reason, the piezoelectric element which is a drive source can be arranged laterally with respect to the expansion / contraction direction, and the entire thickness of the lens actuator can be reduced.
- the entire frame around the lens can be used as an insulator, so that the displacement magnification rate of the piezoelectric element can be set large, and the lens is made parallel by a structure in which the ends are crossed. It is possible to move in the direction of the optical axis while maintaining the state.
- the invention described in claim 2 relates to the lens actuator described in claim 1, wherein the displacement magnifying mechanism is configured separately from the housing of the actuator. For this reason, the expansion / contraction displacement of the drive source can be set large, and the entire lens actuator can be made compact.
- the position of the end of the displacement magnifying mechanism can be adjusted by configuring the displacement magnifying mechanism as a separate body, it is possible to arrange the lens according to the internal structure of the device on which the lens actuator is mounted when the lens is mounted. .
- the invention described in claim 3 is characterized in that a plate-like spacer is provided at the intersecting portion, and it is possible to suppress the force in the twisting direction generated at the end of the displacement magnifying mechanism by connecting the insulators.
- the intersecting portion by fixing the intersecting portion with a spacer, the relative position between the end portions can be kept constant, and stable lens driving can be performed.
- the lens actuator described in the present invention uses a piezoelectric element as a drive source, unlike the rotary barrel type structure, there is no generation of friction powder during driving, and foreign matter is generated in the optical axis. It has a structure that does not easily occur.
- FIG. 1 is a perspective view of a lens actuator used in the first embodiment of the present invention.
- the lens actuator in the present embodiment expands the displacement of the piezoelectric element 5 as a driving source by an annularly arranged displacement enlarging mechanism in which the insulator portion 3 and the displacement enlarging mechanism end portion 4 are connected.
- the structure is such that the expansion / contraction displacement of the piezoelectric element is changed to the displacement in the optical axis direction A by enlarging the displacement in the direction C and fixing the displacement enlarging mechanism end 4 to the base 7.
- the displacement of the drive source can be enlarged in a state where no obstacle is generated on the optical axis, and the displacement magnifying mechanism is configured around the optical axis A. It is possible to secure the length of the portion 3 and to set a large enlargement ratio when the displacement is enlarged.
- FIG. 2 is an exploded perspective view of the lens actuator shown in the first embodiment.
- the lens actuator described in the present embodiment has a drive structure in which the end portions 4 of the displacement magnifying mechanism are crossed with the spacer 6 interposed therebetween.
- the lever portion 3 is configured separately from the base portion 7, the planar shape of the entire lens actuator is reduced, and the driving structure in which the expansion / contraction direction B of the piezoelectric element 5 serving as a driving source is orthogonal to the optical axis A is achieved. Therefore, the thickness can be reduced as compared with the lens barrel type lens actuator.
- FIG. 3 is a perspective view of a lens actuator used in the second embodiment of the present invention.
- the lens actuator in the present embodiment is different from the lens actuator shown in the first embodiment in that the both sides of the displacement magnifying mechanism end 4 are supported by the mutual insulator portions 3. Is used.
- the dimension in the thickness direction can be made lower than that of the lens actuator described in the first embodiment, and the displacement magnifying mechanism end 4 receives stress from two contact points with the insulator portion 3. Therefore, the lens driving range could be set larger than that of the first embodiment.
- FIG. 4 shows an exploded perspective view of the lens actuator used in this embodiment.
- the structure described in this embodiment does not use the base portion 7 provided in the lens actuator described in the first embodiment. For this reason, in addition to the lens actuator described in Example 1 described above, further thinning is possible.
- the height is adjusted by sandwiching the support block 8 between the displacement magnifying mechanism end portion 4 and the lens holder support portion 2, and the lens holder 1 is supported from both sides by an annular suspension 9. Yes. For this reason, it is possible to absorb the inclination generated when the lens holder 1 is moved by the suspension 9 and to suppress the vibration at the time of driving the lens to improve the responsiveness.
- the lens holder 1 has a structure in which the thickness of the lens holder support portion 2 is changed between the mounting position e and the lens holding portion d, and the lens holder 1 is changed by changing the thickness between the support block 8 and the mounting position. The focus can be adjusted even in a mounting space where the thickness is limited.
- a bending structure is applied to the end portion 4 to improve mass productivity, and by using an elastic material for the end portion 4, the displacement of the piezoelectric element 5 expanded by the insulator portion 3 can be changed in the optical axis direction A. It was possible to absorb the displacement in the torsional direction that occurred at the end portion 4 of the displacement enlarging mechanism when the displacement was changed.
- a lens actuator that is thin and does not easily shift the lens position with respect to the optical axis and that can obtain a large displacement with respect to the displacement of the drive source is provided. It became possible to do.
- the perspective view of the lens actuator used in 1st Example of this invention 1 is an exploded perspective view of a lens actuator used in the first embodiment of the present invention.
- the perspective view of the lens actuator used in 2nd Example of this invention Exploded perspective view of a lens actuator used in the second embodiment of the present invention
Abstract
A lens actuator which is thin, which is less likely to cause displacement of the position of a lens relative to the optical axis, and which provides a great amount of displacement for the amount of displacement of a drive source. A lens actuator having an annularly mounted lever type displacement enlarging mechanism has a structure in which those ends of the lever type displacement enlarging mechanism which are connected through a lever section are provided so as to face and cross a piezoelectric element which is a drive source. The construction minimizes a tilt of a lens when the lens is driven and allows the entire structure of the actuator to be thin.
Description
現在、携帯電話に代表される移動体通信機器の中にはカメラ機能を付加したものがあり、撮影した画像を外部に出力することが可能になっている。
Currently, some mobile communication devices represented by mobile phones have a camera function added, and it is possible to output captured images to the outside.
このような移動体通信機器に搭載されるカメラのレンズアクチュエータは圧電素子等の伸縮変位によってレンズを駆動するものと、レンズ鏡筒によってレンズを駆動するものに大別される。
¡Lens actuators for cameras mounted on such mobile communication devices are roughly classified into those that drive a lens by expansion and contraction displacement of a piezoelectric element or the like and those that drive a lens by a lens barrel.
上述した伸縮変位によってレンズ駆動をする構造としては特開２００２－１３０１１４（以下引用文献１として記載）が出願されている。該引用文献１は、形状記憶合金を光軸に対して斜めに設け、伸縮方向から光軸方向の変位のみを取り出してレンズを駆動させる構造となっており、撮像素子とレンズとの距離を短くすることでカメラ機構全体の小型化を可能としている。
Japanese Patent Application Laid-Open No. 2002-130114 (hereinafter referred to as Cited Document 1) has been filed as a structure for driving a lens by the above-described expansion and contraction displacement. The cited document 1 has a structure in which the shape memory alloy is provided obliquely with respect to the optical axis, and the lens is driven by taking out only the displacement in the optical axis direction from the expansion / contraction direction, and the distance between the imaging element and the lens is shortened. This makes it possible to reduce the size of the entire camera mechanism.
また、レンズ鏡筒を用いた構造としては特開２００５－２７４７９６（以下引用文献２として記載）が出願されており、コイル－マグネット間に働く磁気力によってレンズ鏡筒を光軸方向に移動させることを特徴としている。
Japanese Patent Application Laid-Open No. 2005-27496 (hereinafter referred to as Cited Document 2) has been filed as a structure using a lens barrel, and the lens barrel is moved in the optical axis direction by a magnetic force acting between a coil and a magnet. It is characterized by.
この為、従来の鏡筒を回転させる駆動構造よりも良好な即応性を得ることができると共に、鏡筒をガイドとして使うことで光軸方向へのレンズ駆動をラジアル方向のズレ無しに行うことが可能となる。
For this reason, it is possible to obtain better responsiveness than the conventional drive structure for rotating the lens barrel, and it is possible to drive the lens in the optical axis direction without deviation in the radial direction by using the lens barrel as a guide. It becomes possible.
しかしながら、前記特許文献１には、レンズホルダを弾性部材によって平行支持している構造上、レンズ駆動時にレンズが光軸に対して垂直方向に移動する為、レンズの焦点位置を撮像素子に対して一定とすることができず、撮像素子の使用効率が悪くなってしまう。
However, in Patent Document 1, since the lens holder is supported in parallel by an elastic member, the lens moves in a direction perpendicular to the optical axis when the lens is driven. It cannot be made constant, and the use efficiency of the image sensor becomes worse.
また、引用文献２に記載のレンズアクチュエータは鏡筒を内部に納めた構造の為、アクチュエータ全体の厚みに対してレンズの移動範囲を大きく設定することができず、薄型の構成とすることが難しい。
Further, since the lens actuator described in the cited document 2 has a structure in which the lens barrel is housed, the moving range of the lens cannot be set large with respect to the thickness of the entire actuator, and it is difficult to form a thin structure. .
上記述べた問題点に鑑み、本発明は薄型で光軸に対するレンズ位置がずれにくく、駆動源の変位量に対して大きい変位量を得ることができるレンズアクチュエータを提供することを目的としている。
In view of the above-described problems, an object of the present invention is to provide a lens actuator that is thin and does not easily shift the lens position with respect to the optical axis, and that can obtain a large displacement with respect to the displacement of the drive source.
前記目的のため、請求項１記載の発明では、梃子を用いて変位を拡大する変位拡大機構搭載型のレンズアクチュエータに於いて、駆動源である圧電素子及びその両端に接続した変位拡大機構を環状に配置し、前記変位拡大機構の両端部を交差させて配置した構造を用いている。
For this purpose, in the first aspect of the present invention, in the displacement-magnification-mechanism-equipped lens actuator that magnifies the displacement using an insulator, the piezoelectric element that is a driving source and the displacement-magnification mechanism that is connected to both ends thereof are annular And a structure in which both ends of the displacement magnifying mechanism are crossed is used.
前記構造を用いた事で、本発明記載のレンズアクチュエータは駆動源となる圧電素子の両端部の変位を垂直方向に変換することが可能となっている。この為、駆動源である圧電素子を伸縮方向に対して横型の配置とし、レンズアクチュエータ全体の厚みを薄く構成することができる。
By using the above-described structure, the lens actuator according to the present invention can convert the displacement of both ends of the piezoelectric element serving as a driving source into the vertical direction. For this reason, the piezoelectric element which is a drive source can be arranged laterally with respect to the expansion / contraction direction, and the entire thickness of the lens actuator can be reduced.
また、変位拡大機構を環状に配置する事でレンズ周辺のフレーム全体を梃子として使用し、圧電素子の変位拡大率を大きく設定することができると共に、端部を交差させた構造によってレンズを平行に保った状態での光軸方向の移動が可能となる。
In addition, by disposing the displacement magnification mechanism in an annular shape, the entire frame around the lens can be used as an insulator, so that the displacement magnification rate of the piezoelectric element can be set large, and the lens is made parallel by a structure in which the ends are crossed. It is possible to move in the direction of the optical axis while maintaining the state.
また、請求項２に記載の発明では、請求項１記載のレンズアクチュエータに関して、変位拡大機構を、アクチュエータの筐体とは別体で構成したことを特徴としている。この為、駆動源の伸縮変位を大きく設定することが可能になると共に、レンズアクチュエータ全体を小型に構成することができる。
Further, the invention described in claim 2 relates to the lens actuator described in claim 1, wherein the displacement magnifying mechanism is configured separately from the housing of the actuator. For this reason, the expansion / contraction displacement of the drive source can be set large, and the entire lens actuator can be made compact.
また、 変位拡大機構を別体として構成することで変位拡大機構端部の位置が調整可能となる為、レンズ取付時に、レンズアクチュエータを搭載する機器の内部構造に合わせたレンズ配置とすることができる。
In addition, since the position of the end of the displacement magnifying mechanism can be adjusted by configuring the displacement magnifying mechanism as a separate body, it is possible to arrange the lens according to the internal structure of the device on which the lens actuator is mounted when the lens is mounted. .
また、請求項３に記載の発明では、交差部分に板状のスペーサーを設けることを特徴としており、梃子の連結によって変位拡大機構端部に生じる捩れ方向の力を抑える事が可能となる。加えて、スペーサーによって交差部を固定することで端部同士の相対位置を一定に保ち、安定したレンズ駆動を行うことができる。
Further, the invention described in claim 3 is characterized in that a plate-like spacer is provided at the intersecting portion, and it is possible to suppress the force in the twisting direction generated at the end of the displacement magnifying mechanism by connecting the insulators. In addition, by fixing the intersecting portion with a spacer, the relative position between the end portions can be kept constant, and stable lens driving can be performed.
以上述べた効果に加えて、本発明に記載のレンズアクチュエータは圧電素子を駆動源としている為、回転鏡筒式の構造と異なり駆動時に摩擦粉が発生することが無く、光軸内に異物が生じにくい構造となっている。
In addition to the effects described above, since the lens actuator described in the present invention uses a piezoelectric element as a drive source, unlike the rotary barrel type structure, there is no generation of friction powder during driving, and foreign matter is generated in the optical axis. It has a structure that does not easily occur.
In addition to the effects described above, since the lens actuator described in the present invention uses a piezoelectric element as a drive source, unlike the rotary barrel type structure, there is no generation of friction powder during driving, and foreign matter is generated in the optical axis. It has a structure that does not easily occur.
以下に、図１～図４を用いて、本発明に於ける第一及び第二の実施形態を示す。
The first and second embodiments of the present invention will be described below with reference to FIGS.
図１に本発明に於ける第一の実施例で用いるレンズアクチュエータの斜視図を示す。図１から解るように、本実施例に於けるレンズアクチュエータは駆動源である圧電素子５の変位を、梃子部３と変位拡大機構端部４とを連結した環状配置の変位拡大機構によって変位拡大方向Ｃの変位に拡大し、変位拡大機構端部４を基部７に固定することで圧電素子の伸縮変位を光軸方向Ａの変位に変える構造となっている。
FIG. 1 is a perspective view of a lens actuator used in the first embodiment of the present invention. As can be seen from FIG. 1, the lens actuator in the present embodiment expands the displacement of the piezoelectric element 5 as a driving source by an annularly arranged displacement enlarging mechanism in which the insulator portion 3 and the displacement enlarging mechanism end portion 4 are connected. The structure is such that the expansion / contraction displacement of the piezoelectric element is changed to the displacement in the optical axis direction A by enlarging the displacement in the direction C and fixing the displacement enlarging mechanism end 4 to the base 7.
この為、レンズホルダ１へのレンズ搭載時、光軸上に障害物が生じない状態で駆動源の変位を拡大する事ができると共に、光軸Ａを中心として変位拡大機構を構成したことによって梃子部３の長さを確保し、前記変位拡大時の拡大率を大きく設定する事が可能となった。
For this reason, when the lens is mounted on the lens holder 1, the displacement of the drive source can be enlarged in a state where no obstacle is generated on the optical axis, and the displacement magnifying mechanism is configured around the optical axis A. It is possible to secure the length of the portion 3 and to set a large enlargement ratio when the displacement is enlarged.
図２に前記第一の実施例に於いて示したレンズアクチュエータの分解斜視図を示す。図２から解る様に、本実施例に記載のレンズアクチュエータはスペーサー６を挟んで変位拡大機構端部４を交差させた駆動構造となっている。
FIG. 2 is an exploded perspective view of the lens actuator shown in the first embodiment. As can be seen from FIG. 2, the lens actuator described in the present embodiment has a drive structure in which the end portions 4 of the displacement magnifying mechanism are crossed with the spacer 6 interposed therebetween.
この為、交差して配置した各変位拡大機構端部４に働く捩れ方向の変位をスペーサー６によって吸収し、レンズホルダ支持部２によって支持されたレンズホルダ１が光軸Ａに沿って移動する際に、傾きを生じることなく安定した状態で駆動させることができた。
For this reason, when the lens holder 1 supported by the lens holder support part 2 moves along the optical axis A, the displacement in the torsional direction acting on each of the displacement magnifying mechanism end parts 4 arranged in an intersecting manner is absorbed by the spacer 6. In addition, it was possible to drive in a stable state without causing an inclination.
また、梃子部３を基部７とは別体に構成したことでレンズアクチュエータ全体の平面形状を小さくすると共に、駆動源である圧電素子５の伸縮方向Ｂと光軸Ａが直交する駆動構造となっている為、レンズ鏡筒型のレンズアクチュエータと比較して厚みを薄くすることが可能となった。
Further, since the lever portion 3 is configured separately from the base portion 7, the planar shape of the entire lens actuator is reduced, and the driving structure in which the expansion / contraction direction B of the piezoelectric element 5 serving as a driving source is orthogonal to the optical axis A is achieved. Therefore, the thickness can be reduced as compared with the lens barrel type lens actuator.
図３に本発明に於ける第二の実施例で用いるレンズアクチュエータの斜視図を示す。図３から解るように、本実施例に於けるレンズアクチュエータは、上記第一の実施例で示したレンズアクチュエータとは異なり、変位拡大機構端部４の両側を互いの梃子部３に支持した構造を用いている。
FIG. 3 is a perspective view of a lens actuator used in the second embodiment of the present invention. As can be seen from FIG. 3, the lens actuator in the present embodiment is different from the lens actuator shown in the first embodiment in that the both sides of the displacement magnifying mechanism end 4 are supported by the mutual insulator portions 3. Is used.
この為、本実施例では前記実施例１に記載のレンズアクチュエータよりも更に厚み方向の寸法を低く構成することができると共に、変位拡大機構端部４が梃子部３との２つの接点から応力を受ける為、レンズの駆動範囲に関して前記実施例１よりも大きく設定することができた。
Therefore, in this embodiment, the dimension in the thickness direction can be made lower than that of the lens actuator described in the first embodiment, and the displacement magnifying mechanism end 4 receives stress from two contact points with the insulator portion 3. Therefore, the lens driving range could be set larger than that of the first embodiment.
図４に本実施例に於いて用いたレンズアクチュエータの分解斜視図を示す。図４から解るように、本実施例に記載の構造では前述の実施例１記載のレンズアクチュエータが備えていた基部７を使用しない構造となっている。この為、前述した実施例1記載のレンズアクチュエータに加えて更なる薄型化が可能となった。
FIG. 4 shows an exploded perspective view of the lens actuator used in this embodiment. As can be seen from FIG. 4, the structure described in this embodiment does not use the base portion 7 provided in the lens actuator described in the first embodiment. For this reason, in addition to the lens actuator described in Example 1 described above, further thinning is possible.
また、レンズホルダ１に関して、変位拡大機構端部４とレンズホルダ支持部２との間に支持ブロック８を挟んで高さを調節し、更に環状のサスペンション９によって両面からレンズホルダ１を支持している。この為、レンズホルダ１の移動時に生じる傾きをサスペンション９によって吸収すると共に、レンズ駆動時の振動を抑えて即応性を向上させることが可能となった。
Further, with respect to the lens holder 1, the height is adjusted by sandwiching the support block 8 between the displacement magnifying mechanism end portion 4 and the lens holder support portion 2, and the lens holder 1 is supported from both sides by an annular suspension 9. Yes. For this reason, it is possible to absorb the inclination generated when the lens holder 1 is moved by the suspension 9 and to suppress the vibration at the time of driving the lens to improve the responsiveness.
また、レンズホルダ１の厚みをレンズホルダ支持部２の取付位置ｅとレンズ保持部ｄとで変えた構造を用いており、支持ブロック８と前記取付位置との厚みを変える事によってレンズホルダ１の厚みが制限された搭載スペースでも焦点調節を行うことが可能な構造となった。
The lens holder 1 has a structure in which the thickness of the lens holder support portion 2 is changed between the mounting position e and the lens holding portion d, and the lens holder 1 is changed by changing the thickness between the support block 8 and the mounting position. The focus can be adjusted even in a mounting space where the thickness is limited.
また、端部４に関して曲げ構造を適用しており、量産性を向上すると共に、前記端部４に弾性材料を用いることで、梃子部３によって拡大された圧電素子５の変位を光軸方向Ａの変位に変える際に変位拡大機構端部４で生じる、捩れ方向の変位を吸収することができた。
Further, a bending structure is applied to the end portion 4 to improve mass productivity, and by using an elastic material for the end portion 4, the displacement of the piezoelectric element 5 expanded by the insulator portion 3 can be changed in the optical axis direction A. It was possible to absorb the displacement in the torsional direction that occurred at the end portion 4 of the displacement enlarging mechanism when the displacement was changed.
以上述べたように、本実施例に記載のレンズアクチュエータを用いる事で、薄型で光軸に対するレンズ位置がずれにくく、駆動源の変位量に対して大きい変位量を得ることができるレンズアクチュエータを提供することが可能となった。
As described above, by using the lens actuator described in the present embodiment, a lens actuator that is thin and does not easily shift the lens position with respect to the optical axis and that can obtain a large displacement with respect to the displacement of the drive source is provided. It became possible to do.
As described above, by using the lens actuator described in the present embodiment, a lens actuator that is thin and does not easily shift the lens position with respect to the optical axis and that can obtain a large displacement with respect to the displacement of the drive source is provided. It became possible to do.
１ レンズホルダ
２ レンズホルダ支持部
３ 梃子部
４ 変位拡大機構端部
５ 圧電素子
６ スペーサー
７ 基部
８ 支持ブロック
９ サスペンション
Ａ 光軸方向
Ｂ 伸縮方向
Ｃ 変位拡大方向
ｄ レンズ保持部
ｅ 取付位置 DESCRIPTION OFSYMBOLS 1 Lens holder 2 Lens holder support part 3 Insulator part 4 Displacement expansion mechanism edge part 5 Piezoelectric element 6 Spacer 7 Base part 8 Support block 9 Suspension A Optical axis direction B Expansion / contraction direction C Displacement expansion direction d Lens holding part e Attachment position
２ レンズホルダ支持部
３ 梃子部
４ 変位拡大機構端部
５ 圧電素子
６ スペーサー
７ 基部
８ 支持ブロック
９ サスペンション
Ａ 光軸方向
Ｂ 伸縮方向
Ｃ 変位拡大方向
ｄ レンズ保持部
ｅ 取付位置 DESCRIPTION OF
Claims (3)
- 圧電素子の伸縮方向の変位を駆動源とし、
前記変位の拡大と、変位方向の光軸方向への変換とを行う梃子型の変位拡大機構を基部に備えたレンズアクチュエータであって、
圧電素子とその両端に設けた変位拡大機構とを環状に配置し、
前記変位拡大機構の端部を前記環状配置に於ける圧電素子の対向側で交差させたレンズアクチュエータ。 The displacement in the expansion and contraction direction of the piezoelectric element is used as the drive source,
A lens actuator including a lever-type displacement magnifying mechanism at the base for magnifying the displacement and converting the displacement direction to the optical axis direction;
A piezoelectric element and displacement magnifying mechanisms provided at both ends thereof are arranged in an annular shape,
A lens actuator in which end portions of the displacement enlarging mechanism are crossed on opposite sides of the piezoelectric elements in the annular arrangement. - 前記変位拡大機構を、前記レンズアクチュエータの基部とは別体で構成した請求項１記載のレンズアクチュエータ。 The lens actuator according to claim 1, wherein the displacement enlarging mechanism is configured separately from a base portion of the lens actuator.
- 前記交差部分に板状のスペーサーを設けた請求項１又は２に記載のレンズアクチュエータ。 The lens actuator according to claim 1, wherein a plate-like spacer is provided at the intersecting portion.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009801071849A CN101960351B (en) | 2008-04-15 | 2009-04-15 | Lens actuator |
| KR1020107015509A KR101159171B1 (en) | 2008-04-15 | 2009-04-15 | Lens actuator |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008106006A JP5292529B2 (en) | 2008-04-15 | 2008-04-15 | Lens actuator |
| JP2008-106006 | 2008-04-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2009128463A1 true WO2009128463A1 (en) | 2009-10-22 |
Family
ID=41199151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2009/057548 WO2009128463A1 (en) | 2008-04-15 | 2009-04-15 | Lens actuator |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5292529B2 (en) |
| KR (1) | KR101159171B1 (en) |
| CN (1) | CN101960351B (en) |
| WO (1) | WO2009128463A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011118277A (en) * | 2009-12-07 | 2011-06-16 | Namiki Precision Jewel Co Ltd | Lens actuator |
| JP5809448B2 (en) * | 2011-05-27 | 2015-11-10 | 並木精密宝石株式会社 | Temperature compensation structure of lens actuator |
| KR102351098B1 (en) | 2015-01-16 | 2022-01-14 | 삼성전자주식회사 | Camera and lens module |
| CN108444915B (en) * | 2018-03-20 | 2020-07-07 | 山东大学苏州研究院 | Piezoelectric-driven single-degree-of-freedom optical detection platform and using method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62116910A (en) * | 1985-11-15 | 1987-05-28 | Nec Corp | Piezoelectric lens driving device |
| JPH01199302A (en) * | 1988-02-03 | 1989-08-10 | Hitachi Ltd | Optical magnetic storage device |
| JPH03296926A (en) * | 1990-04-16 | 1991-12-27 | Alps Electric Co Ltd | Objective lens supporting mechanism for optical information device |
| JPH04255919A (en) * | 1991-02-08 | 1992-09-10 | Olympus Optical Co Ltd | Optical head actuator |
| JPH09106944A (en) * | 1995-08-07 | 1997-04-22 | Canon Inc | Optical device, exposure device and method for production of device |
| JPH11204848A (en) * | 1998-01-16 | 1999-07-30 | Ricoh Co Ltd | Piezo-electric actuator device |
| JP2003258330A (en) * | 2002-03-07 | 2003-09-12 | Seiko Instruments Inc | Piezoelectric actuator having function for increasing displacement, and electronic apparatus provided with the same |
| WO2006043549A1 (en) * | 2004-10-19 | 2006-04-27 | Matsushita Electric Industrial Co., Ltd. | Piezoelectric actuator, and image pickup element moving device and image pickup device using such piezoelectric actuator |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10301013A (en) | 1997-04-25 | 1998-11-13 | Asahi Optical Co Ltd | Lens driving mechanism |
| JP2006038891A (en) * | 2004-07-22 | 2006-02-09 | Konica Minolta Photo Imaging Inc | Imaging apparatus |
| JP4317508B2 (en) * | 2004-09-29 | 2009-08-19 | ナノモーション リミテッド | Camera module and portable terminal equipped with the camera module |
| CN100498405C (en) * | 2005-01-27 | 2009-06-10 | 柯尼卡美能达精密光学株式会社 | Lens unit and image pickup unit |
| KR100799867B1 (en) * | 2006-02-20 | 2008-01-31 | 삼성전기주식회사 | Device for Lens Transfer |
| WO2008047782A1 (en) | 2006-10-16 | 2008-04-24 | Namiki Seimitsu Houseki Kabushikikaisha | Actuator |
-
2008
- 2008-04-15 JP JP2008106006A patent/JP5292529B2/en active Active
-
2009
- 2009-04-15 KR KR1020107015509A patent/KR101159171B1/en not_active IP Right Cessation
- 2009-04-15 CN CN2009801071849A patent/CN101960351B/en not_active Expired - Fee Related
- 2009-04-15 WO PCT/JP2009/057548 patent/WO2009128463A1/en active Application Filing
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62116910A (en) * | 1985-11-15 | 1987-05-28 | Nec Corp | Piezoelectric lens driving device |
| JPH01199302A (en) * | 1988-02-03 | 1989-08-10 | Hitachi Ltd | Optical magnetic storage device |
| JPH03296926A (en) * | 1990-04-16 | 1991-12-27 | Alps Electric Co Ltd | Objective lens supporting mechanism for optical information device |
| JPH04255919A (en) * | 1991-02-08 | 1992-09-10 | Olympus Optical Co Ltd | Optical head actuator |
| JPH09106944A (en) * | 1995-08-07 | 1997-04-22 | Canon Inc | Optical device, exposure device and method for production of device |
| JPH11204848A (en) * | 1998-01-16 | 1999-07-30 | Ricoh Co Ltd | Piezo-electric actuator device |
| JP2003258330A (en) * | 2002-03-07 | 2003-09-12 | Seiko Instruments Inc | Piezoelectric actuator having function for increasing displacement, and electronic apparatus provided with the same |
| WO2006043549A1 (en) * | 2004-10-19 | 2006-04-27 | Matsushita Electric Industrial Co., Ltd. | Piezoelectric actuator, and image pickup element moving device and image pickup device using such piezoelectric actuator |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20100094573A (en) | 2010-08-26 |
| KR101159171B1 (en) | 2012-06-22 |
| CN101960351B (en) | 2012-08-15 |
| JP2009258300A (en) | 2009-11-05 |
| CN101960351A (en) | 2011-01-26 |
| JP5292529B2 (en) | 2013-09-18 |
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