JP2013025035A

JP2013025035A - Lens drive device

Info

Publication number: JP2013025035A
Application number: JP2011159131A
Authority: JP
Inventors: Kokichi Terajima; 厚吉寺嶋
Original assignee: XINHONGZHOU PRECISION Tech CO Ltd; Micro Win Tech Inc; Terajima Kokichi; Largan Precision Co Ltd
Current assignee: XINHONGZHOU PRECISION Tech CO Ltd; Micro Win Tech Inc; Terajima Kokichi; Largan Precision Co Ltd
Priority date: 2011-07-20
Filing date: 2011-07-20
Publication date: 2013-02-04
Also published as: CN102890328A; CN102890328B

Abstract

PROBLEM TO BE SOLVED: To provide a lens drive device configured to include an offset in a lens holder, which can rock the lens holder, regardless of the position of the lens holder, is simple in structure, and can be miniaturized.SOLUTION: The lens drive device includes a lens holder 12 holding a lens 11, a driving coil 15 wound on the outer circumferential side of the lens holder 12, a case 14 being a fixed member, a driving magnet 16 held by the case 14 and arranged to face the driving coil 15 with a gap, and a lock member 13 arranged on the side opposite to an object side of the lens holder 12 and coming into contact with the lens holder 12. The lens drive device is configured so that the lock member 13 is suspended and supported to be swingable with respect to the case 14 by spring members for locking 19A and 19B and the lens holder 12 can be moved to the object side with respect to the lock member 13 and is suspended and supported in such a state that the lens holder 12 is energized to the opposite side to the object side by spring members for driving 18A and 18B.

Description

本発明は、例えば、撮影用光学機器などの手振れを抑制することのできるレンズ駆動装置に関するものである。 The present invention relates to a lens driving device capable of suppressing camera shake of, for example, a photographing optical apparatus.

近年、携帯電話等に搭載されるカメラはイメージセンサーの画素数が増大されて撮影画像の高品質化が進んでいる。これに伴って、搭載されるレンズ系についても、従来の固定焦点のカメラモジュールから可動焦点のカメラモジュールへと移行しつつある。これは、固定焦点のカメラモジュールでは、焦点ボケが生じて、高画素数イメージセンサーの分解能に対応することができないためである。
可動焦点のカメラモジュールにおけるレンズ系の駆動方式としては、図１６に示すような、ボイスコイルモータを用いたレンズ駆動装置５０が多く用いられている（例えば、特許文献１参照）。 In recent years, a camera mounted on a mobile phone or the like has increased in the number of pixels of an image sensor, and the quality of captured images has been improved. Along with this, the lens system to be mounted is also shifting from the conventional fixed focus camera module to the movable focus camera module. This is because a fixed-focus camera module causes out-of-focus blur and cannot cope with the resolution of the high pixel number image sensor.
As a lens system driving method in a movable focus camera module, a lens driving device 50 using a voice coil motor as shown in FIG. 16 is often used (see, for example, Patent Document 1).

レンズ駆動装置５０は、軟鉄等の磁性体から成る断面がＵ字状のヨーク５１と、ヨーク５１の内壁側に取付けられる駆動用磁石５２と、中央位置にレンズ５３を保持するレンズホルダー５４と、レンズホルダー５４に装着される駆動用コイル５５と、内周側にヨーク５１が装着されるケース５６と、レンズホルダー５４とケース５６とを連結する上下のバネ部材５７Ａ，５７Ｂとを備えている。
駆動用磁石５２としては、円筒状の磁石、あるいは、複数の円弧状の磁石をヨーク５１の内壁側に環状に配列したものが用いられる。駆動用コイル５５は、ヨーク５１と駆動用磁石５２とにより印加される、コイル周りに放射状に分布する磁界中に設置される。
したがって、駆動用コイル５５に通電すると、駆動用コイル５５には被写体の方向（図１６の矢印で示すＺ軸方向前方）へ向いたローレンツ力が発生するので、レンズホルダー５４をローレンツ力とバネ部材５７Ａ，５７Ｂの復元力との釣り合った位置に移動させることができる。すなわち、駆動用コイル５５に通電する電流値を制御することにより、レンズホルダー５４の移動量を制御して、レンズ５３の位置を制御することができる。 The lens driving device 50 includes a yoke 51 having a U-shaped cross section made of a magnetic material such as soft iron, a driving magnet 52 attached to the inner wall side of the yoke 51, a lens holder 54 that holds the lens 53 at the center position, A driving coil 55 attached to the lens holder 54, a case 56 to which the yoke 51 is attached on the inner peripheral side, and upper and lower spring members 57A and 57B connecting the lens holder 54 and the case 56 are provided.
As the driving magnet 52, a cylindrical magnet or a plurality of arc-shaped magnets arranged in an annular shape on the inner wall side of the yoke 51 is used. The drive coil 55 is installed in a magnetic field that is applied by the yoke 51 and the drive magnet 52 and is distributed radially around the coil.
Accordingly, when the drive coil 55 is energized, a Lorentz force is generated in the drive coil 55 in the direction of the subject (forward in the Z-axis direction indicated by the arrow in FIG. 16). It can be moved to a position balanced with the restoring force of 57A and 57B. That is, the position of the lens 53 can be controlled by controlling the amount of movement of the lens holder 54 by controlling the current value supplied to the driving coil 55.

ところで、レンズホルダー５４をケース５６に取付ける際には、無限遠位置の像を図示しないイメージセンサーに合焦させるため、ケース５６にレンズホルダー５４を下側から支持する係止部５６ｋを設けて、バネ部材５７Ａ，５７ＢをＺ軸方向前方にＰ₀だけオフセットした状態で取付ける。これにより、駆動用コイル５５に通電すると、図１７に示すように、駆動電流の大きさが始動電流値Ｉ₀に至るまでは、バネ部材５７Ａ，５７Ｂに加えられたオフセットＰ₀により、レンズホルダー５４は、ケース５６に当接したままの状態が維持され、駆動電流の大きさが始動電流値Ｉ₀を超えたところからは、レンズホルダー５４はフックの法則にしたがって、Ｚ軸前方に移動する。
このように、オフセットＰ₀を設けることで、レンズ駆動装置５０を上方向や下方向に向けた場合でもレンズホルダー５４を安定して最下位置に保持することができる。 By the way, when attaching the lens holder 54 to the case 56, in order to focus the image at infinity on an image sensor (not shown), the case 56 is provided with a locking portion 56k that supports the lens holder 54 from below. The spring members 57A and 57B are attached in a state offset by P ₀ forward in the Z-axis direction. Thus, when the drive coil 55 is energized, the lens holder is offset by the offset P ₀ applied to the spring members 57A and 57B until the magnitude of the drive current reaches the starting current value I ₀ as shown in FIG. 54 is maintained in contact with the case 56, and the lens holder 54 moves forward in the Z-axis according to Hook's law from the point where the magnitude of the drive current exceeds the starting current value I _0. .
Thus, by providing the offset P ₀ , the lens holder 54 can be stably held at the lowest position even when the lens driving device 50 is directed upward or downward.

特開２００４−２８００３１号公報JP 2004-280031 A

ところで、従来のレンズ駆動装置においては、上述したように焦点駆動のみで手振れを抑制できないので、手振れを抑制するためには駆動系を別途設ける必要があった。
しかしながら、手振れを抑制機構を別途設けると、構造が複雑となり小型化が困難であるといった問題点があった。 By the way, in the conventional lens driving device, as described above, since the camera shake cannot be suppressed only by the focus driving, it is necessary to separately provide a drive system in order to suppress the camera shake.
However, if a mechanism for suppressing camera shake is separately provided, there is a problem that the structure becomes complicated and it is difficult to reduce the size.

本発明は、従来の問題点に鑑みてなされたもので、係止部材によりレンズホルダーを前方に押し出してオフセットを設けた形態のレンズ駆動装置において、レンズホルダーの位置に関わらずレンズホルダーを揺動させることのできる、構造が簡単で小型化が可能なレンズ駆動装置を提供することを目的とする。 The present invention has been made in view of conventional problems, and in a lens driving device in which an offset is provided by pushing the lens holder forward by a locking member, the lens holder is swung regardless of the position of the lens holder. An object of the present invention is to provide a lens driving device that can be made simple and can be downsized.

本願の請求項１に記載の発明は、レンズを保持するレンズホルダーと、前記レンズホルダーの外周側に巻回された駆動用コイルと、固定部材であるケースと、前記ケースに保持されて前記駆動用コイルと空隙を隔てて対向するように配置された駆動用磁石とを備えたレンズ駆動装置であって、前記レンズホルダーの被写体側とは反対側に配置されて前記レンズホルダーに当接する係止部材を備え、前記係止部材が係止用バネ部材により前記ケースに対して揺動可能に懸架支持され、前記レンズホルダーが駆動用バネ部材により前記係止部材に対して被写体側に移動可能かつ被写体側とは反対側に付勢されて懸架支持されていることを特徴とする。
このような構成を採ることにより、焦点駆動に用いられる磁石を手振れ抑制駆動と共用することができるとともに、レンズホルダーの位置に関わらずレンズホルダーを揺動させることのできる、構造が簡単で小型化が可能なレンズ駆動装置を提供することができる。
なお、「揺動」は、被写体側をＺ軸方向前方としＺ軸に垂直な２方向をそれぞれＸ軸方向、Ｙ軸方向としたときに、ＸＹ平面内での移動とＺ軸に垂直な面内での回転動とを含むものとする。 According to the first aspect of the present invention, the lens holder that holds the lens, the driving coil wound around the outer periphery of the lens holder, the case that is a fixing member, and the driving that is held by the case A lens driving device comprising a driving coil and a driving magnet arranged so as to face each other with a gap, and is disposed on a side opposite to the subject side of the lens holder and abuts against the lens holder The locking member is suspended and supported by the locking spring member so as to be swingable with respect to the case, and the lens holder is movable toward the subject side with respect to the locking member by the driving spring member; It is biased to the side opposite to the subject side and is suspended and supported.
By adopting such a configuration, the magnet used for focus drive can be shared with camera shake suppression drive, and the lens holder can be swung regardless of the position of the lens holder. It is possible to provide a lens driving device capable of performing
Note that “swing” refers to the movement in the XY plane and the plane perpendicular to the Z axis when the subject side is the front in the Z axis direction and the two directions perpendicular to the Z axis are the X axis direction and the Y axis direction, respectively. And rotational movement in the inside.

請求項２に記載の発明は、請求項１に記載のレンズ駆動装置であって、前記係止部材に補助駆動用コイルが装着されていることを特徴とする。
これにより、簡単な構成で係止部材を揺動させることができる。
また、請求項３に記載の発明は、請求項２に記載のレンズ駆動装置であって、前記補助駆動用コイルが前記駆動用磁石に空隙を隔てて配設されることを特徴とする。
これにより、係止部材を効率よく揺動させることができる。
請求項４に記載の発明は、請求項２に記載のレンズ駆動装置であって、前記補助駆動用コイルに空隙を隔てて配設される補助駆動用磁石を備えたことを特徴とする。
このように、補助駆動用磁石を設けて補助駆動用コイルに磁界を印加する構成としても係止部材を効率よく揺動させることができる。
また、請求項５に記載の発明は、請求項４に記載のレンズ駆動装置であって、前記補助駆動用磁石の外側に磁気ヨークが配設されていることを特徴とする。
このように、磁気ヨークを設けることで、補助駆動用コイルに効果的に磁界を印加できるので、係止部材を効率よく揺動させることができる。 According to a second aspect of the present invention, in the lens driving device according to the first aspect, an auxiliary driving coil is attached to the locking member.
Accordingly, the locking member can be swung with a simple configuration.
According to a third aspect of the present invention, in the lens driving device according to the second aspect, the auxiliary driving coil is disposed in the driving magnet with a gap.
Thereby, the locking member can be swung efficiently.
A fourth aspect of the present invention is the lens driving device according to the second aspect, wherein the auxiliary driving coil includes an auxiliary driving magnet disposed with a gap.
As described above, even when the auxiliary driving magnet is provided and the magnetic field is applied to the auxiliary driving coil, the locking member can be efficiently swung.
According to a fifth aspect of the present invention, in the lens driving device according to the fourth aspect, a magnetic yoke is disposed outside the auxiliary driving magnet.
Thus, by providing the magnetic yoke, a magnetic field can be effectively applied to the auxiliary driving coil, so that the locking member can be swung efficiently.

請求項６に記載の発明は、請求項１に記載のレンズ駆動装置であって、被写体側をＺ軸方向前方としたときに、前記駆動用コイルが、レンズホルダーを挟んで互いに対向するように設けられＺ軸方向に直交する方向に巻き回された少なくとも１対のコイルを備え、前記駆動用磁石が、Ｚ軸方向前方に配置される第１の磁石と、前記第１の磁石とは異なる極性を有しＺ軸方向後方に配置される第２の磁石とを備えたことを特徴とする。
このような構成を採ることにより、補助駆動用コイルを設けることなく、係止部材を揺動させることができる。 A sixth aspect of the present invention is the lens driving device according to the first aspect, wherein the driving coils face each other across the lens holder when the subject side is the front in the Z-axis direction. Provided with at least one pair of coils wound in a direction orthogonal to the Z-axis direction, and the drive magnet is different from the first magnet disposed in front of the Z-axis direction. And a second magnet having polarity and disposed rearward in the Z-axis direction.
By adopting such a configuration, the locking member can be swung without providing an auxiliary drive coil.

なお、前記発明の概要は、本発明の必要な全ての特徴を列挙したものではなく、これらの特徴群のサブコンビネーションもまた、発明となり得る。 The summary of the invention does not list all necessary features of the present invention, and a sub-combination of these feature groups can also be an invention.

本発明の実施の形態１に係るレンズ駆動装置の構成を示す縦断面図である。It is a longitudinal cross-sectional view which shows the structure of the lens drive device which concerns on Embodiment 1 of this invention. 実施の形態１に係るレンズ駆動装置の平面図である。1 is a plan view of a lens driving device according to Embodiment 1. FIG. 実施の形態１のレンズ駆動装置の分解斜視図である。FIG. 3 is an exploded perspective view of the lens driving device according to the first embodiment. 駆動用磁石の発生する磁界と磁束密度分布を示す図である。It is a figure which shows the magnetic field and magnetic flux density distribution which a drive magnet generate | occur | produces. 本発明によるレンズ駆動装置の他の構成を示す平面図である。It is a top view which shows the other structure of the lens drive device by this invention. 本発明によるレンズ駆動装置の他の構成を示す縦断面図である。It is a longitudinal cross-sectional view which shows the other structure of the lens drive device by this invention. 駆動用磁石と磁気ヨークとの関係を示す図である。It is a figure which shows the relationship between a drive magnet and a magnetic yoke. 実施の形態２に係るレンズ駆動装置の構成を示す図である。6 is a diagram illustrating a configuration of a lens driving device according to Embodiment 2. FIG. 実施の形態２のレンズ駆動装置の分解斜視図である。FIG. 6 is an exploded perspective view of a lens driving device according to a second embodiment. 実施の形態３に係るレンズ駆動装置の構成を示す図である。6 is a diagram illustrating a configuration of a lens driving device according to Embodiment 3. FIG. 実施の形態３のレンズ駆動装置の動作を説明するための図である。FIG. 10 is a diagram for explaining the operation of the lens driving device according to the third embodiment. 実施の形態３のレンズ駆動装置の動作を説明するための図である。FIG. 10 is a diagram for explaining the operation of the lens driving device according to the third embodiment. 本発明によるレンズ駆動装置の他の構成を示す平面図である。It is a top view which shows the other structure of the lens drive device by this invention. 本発明によるレンズ駆動装置の他の構成を示す平面図である。It is a top view which shows the other structure of the lens drive device by this invention. 図１４のレンズ駆動装置における補助駆動用コイルと補助磁石との関係を示す図である。It is a figure which shows the relationship between the coil for auxiliary drives and an auxiliary magnet in the lens drive device of FIG. 従来のレンズ駆動装置の構成を示す縦断面図である。It is a longitudinal cross-sectional view which shows the structure of the conventional lens drive device. オフセットがあるときの印加電流とレンズホルダーの移動量との関係を示す図である。It is a figure which shows the relationship between the applied electric current when there exists offset, and the moving amount | distance of a lens holder.

以下、実施の形態を通じて本発明を詳説するが、以下の実施の形態は特許請求の範囲に係る発明を限定するものでなく、また、実施の形態の中で説明される特徴の組み合わせの全てが発明の解決手段に必須であるとは限らない。 Hereinafter, the present invention will be described in detail through embodiments, but the following embodiments do not limit the invention according to the claims, and all combinations of features described in the embodiments are included. It is not necessarily essential for the solution of the invention.

実施の形態１．
図１〜図３は、本実施の形態１に係るレンズ駆動装置１０の構成を示す図で、図１は縦断面図、図２は平面図、図３（ａ）は分解斜視図、図３（ｂ）は係止用バネ部材１９Ａ（１９Ｂ）の詳細を示す図である。
レンズ駆動装置１０はレンズ１１を保持するレンズホルダー１２と、係止部材１３と、ケース１４と、駆動用コイル１５と、駆動用磁石１６と、補助駆動用コイル１７と、駆動用バネ部材１８Ａ，１８Ｂと、係止用バネ部材１９Ａ，１９Ｂとを備える。
図１に示すように、レンズ駆動装置１０のケース１４の被写体側とは反対側にはカメラモジュール基板２１が取付けられ、このカメラモジュール基板２１のレンズホルダー１２側に、レンズ１１により合焦された被写体像を検出するためのイメージセンサー２２が装着されて被写体の撮影を行う。また、レンズホルダー１２の駆動制御及び手振れ抑制制御は図示しない電流制御手段により行う。電流制御手段は駆動用コイル１５と補助駆動用コイル１７に流れる電流を制御する。
レンズホルダー１２は、例えば円筒状の部材で、内側には対物レンズや接眼レンズの組み合わせから成るレンズ１１が保持され、外側には駆動用コイル１５が装着される。
なお、レンズホルダー１２としては、円筒状の他に四角筒状や八角筒状のものを用いてもよい。
以下、レンズ１１の光軸方向の被写体側をＺ軸方向前方（＋Ｚ側）とし、Ｚ軸に垂直な２方向をそれぞれＸ軸方向、Ｙ軸方向とすると、駆動用コイル１５はレンズホルダー１２の外側にＺ軸周りに巻き回される。＋Ｚ側を上側、−Ｚ側を下側ともいう。 Embodiment 1 FIG.
1 to 3 are diagrams showing the configuration of the lens driving device 10 according to the first embodiment. FIG. 1 is a longitudinal sectional view, FIG. 2 is a plan view, FIG. 3A is an exploded perspective view, and FIG. (B) is a figure which shows the detail of 19 A of spring members for locking (19B).
The lens driving device 10 includes a lens holder 12 that holds the lens 11, a locking member 13, a case 14, a driving coil 15, a driving magnet 16, an auxiliary driving coil 17, a driving spring member 18A, 18B and locking spring members 19A and 19B.
As shown in FIG. 1, a camera module substrate 21 is attached to the lens drive device 10 on the side opposite to the subject side of the case 14, and the lens 11 is focused on the lens holder 12 side of the camera module substrate 21. An image sensor 22 for detecting a subject image is attached to shoot the subject. Further, drive control and camera shake suppression control of the lens holder 12 are performed by current control means (not shown). The current control means controls the current flowing through the driving coil 15 and the auxiliary driving coil 17.
The lens holder 12 is, for example, a cylindrical member, and a lens 11 that is a combination of an objective lens and an eyepiece is held on the inner side, and a driving coil 15 is mounted on the outer side.
In addition to the cylindrical shape, the lens holder 12 may be a rectangular tube shape or an octagonal tube shape.
Hereinafter, assuming that the subject side in the optical axis direction of the lens 11 is the front (+ Z side) in the Z-axis direction, and the two directions perpendicular to the Z-axis are the X-axis direction and the Y-axis direction, respectively, the driving coil 15 It is wound around the Z axis on the outside. The + Z side is also called the upper side, and the -Z side is also called the lower side.

係止部材１３は、レンズホルダー１２の被写体側とは反対側に配置されてレンズホルダー１２に当接する円筒状の突き出し部１３Ｔと、突き出し部１３Ｔの周面から径方向に突出する円盤状のフランジ部１３ａと、フランジ１３ａの外縁部から上方に突出するように設けられた円筒状のコイル保持部１３ｂとを備える。コイル保持部１３ｂの外周側には、補助駆動用コイル１７を装着するための孔部（コイル装着部）１３ｓが設けられている。
また、係止部材１３は、コイル保持部１３ｂの内周側の上部と下部にて、駆動用バネ部材１８Ａ，１８Ｂによりレンズホルダー１２を被写体側である＋Ｚ側に移動可能に懸架支持するとともに、突き出し部１３Ｔにより、レンズホルダー１２を＋Ｚ側にＰ₀だけオフセットさせる。したがって、駆動用バネ部材１８Ａ，１８Ｂの復元力により、レンズホルダー１２には、常に下方に引き戻される力が付勢される。
ケース１４は、底部１４ａに開口１４ｈを有する上側が開放された箱状の部材で、４つの側面１４ｂの内側にはそれぞれ、駆動用磁石１６を保持するための取付け凹部１４ｓが形成されている。
また、ケース１４は係止部材１３の外側に配置され、コイル保持部１３ｂの上端側と突き出し部１３Ｔの下端側とにおいて、係止用バネ部材１９Ａ，１９Ｂにより、係止部材１３を遥動可能に懸架支持する。 The locking member 13 is disposed on the opposite side to the subject side of the lens holder 12 and has a cylindrical protruding portion 13T that contacts the lens holder 12, and a disc-shaped flange that protrudes in the radial direction from the peripheral surface of the protruding portion 13T. A portion 13a and a cylindrical coil holding portion 13b provided so as to protrude upward from the outer edge portion of the flange 13a. A hole (coil mounting portion) 13s for mounting the auxiliary driving coil 17 is provided on the outer peripheral side of the coil holding portion 13b.
The locking member 13 suspends and supports the lens holder 12 movably to the subject side + Z side by the driving spring members 18A and 18B at the upper and lower portions on the inner peripheral side of the coil holding portion 13b. The lens holder 12 is offset by P ₀ to the + Z side by the protruding portion 13T. Therefore, the restoring force of the drive spring members 18A and 18B urges the lens holder 12 to always be pulled back downward.
The case 14 is a box-like member having an opening 14h on the bottom 14a and having an open upper side, and mounting recesses 14s for holding the driving magnets 16 are formed on the inner sides of the four side surfaces 14b.
In addition, the case 14 is disposed outside the locking member 13, and the locking member 13 can be swung by the locking spring members 19A and 19B on the upper end side of the coil holding portion 13b and the lower end side of the protruding portion 13T. Suspended to support.

駆動用コイル１５は、レンズホルダー１２の外周にＺ軸周りに巻き回される自動焦点駆動用のコイルで、＋Ｚ側から見たときの外形はレンズホルダー１２と同じ円筒状、または、四角筒状、あるいは、八角筒状である。
駆動用磁石１６は、板面に垂直な方向に磁化された第１〜第４の磁石１６Ａ〜１６Ｄを備え、各磁石１６Ａ〜１６Ｄが駆動用コイル１５に空隙を隔てて対向するようにケース１４に取付けられる。第１及び第２の磁石１６Ａ，１６Ｂは磁界の方向がそれぞれ−Ｘ軸方向及び＋Ｘ軸方向になるように配置され、第３及び第４の磁石１６Ｃ，１６Ｄは磁界の方向がそれぞれ−Ｙ軸方向及び＋Ｙ軸方向になるように配置される。すなわち、第１〜第４の磁石１６Ａ〜１６Ｄの駆動用コイル１５側の面は全てＮ極になるよう配置される。
補助駆動用コイル１７は、Ｘ軸周りに巻き回されて第１及び第２の磁石１６Ａ，１６Ｂとそれぞれ空隙を隔てて配置される第１及び第２の補助コイル１７Ａ，１７Ｂと、第３及び第４の磁石１６Ｃ，１６Ｄとそれぞれ空隙を隔てて配置される第３及び第４の補助コイル１７Ｃ，１７Ｄとを備える。
本例では、第１〜第４の補助コイル１７Ａ〜１７Ｄの上側の辺が第１〜第４の磁石１６Ａ〜１６Ｄの上端部近傍に、下側の辺が第１〜第４の磁石１６Ａ〜１６Ｄの下端部近傍に位置するように、第１〜第４の補助コイル１７Ａ〜１７Ｄを配置するようにしている。 The driving coil 15 is a coil for autofocus driving that is wound around the Z axis around the outer periphery of the lens holder 12, and the outer shape when viewed from the + Z side is the same cylindrical shape or the rectangular cylindrical shape as the lens holder 12. Or it is an octagonal cylinder shape.
The drive magnet 16 includes first to fourth magnets 16A to 16D magnetized in a direction perpendicular to the plate surface, and the case 14 so that each magnet 16A to 16D faces the drive coil 15 with a gap. Mounted on. The first and second magnets 16A and 16B are arranged so that the magnetic field directions are in the −X axis direction and the + X axis direction, respectively, and the third and fourth magnets 16C and 16D are in the −Y axis direction, respectively. And the + Y-axis direction. That is, the surfaces of the first to fourth magnets 16 A to 16 D on the side of the driving coil 15 are all arranged to be N poles.
The auxiliary driving coil 17 is wound around the X-axis and is arranged with a first gap and a gap between the first and second magnets 16A and 16B, and the third and second auxiliary coils 17A and 17B. The fourth magnets 16C and 16D are provided with third and fourth auxiliary coils 17C and 17D, respectively, spaced apart from each other.
In this example, the upper side of the first to fourth auxiliary coils 17A to 17D is near the upper end of the first to fourth magnets 16A to 16D, and the lower side is the first to fourth magnets 16A to 16A. The first to fourth auxiliary coils 17A to 17D are arranged so as to be positioned near the lower end of 16D.

ここで、各磁石１６Ａ〜１６Ｄの発生する磁界について、第２の磁石１６Ｂを例にとって説明する。図４（ａ），（ｂ）に示すように、第２の磁石１６ＢのＺ方向の両端部からＸ方向に距離ｄ離れた点Ａ，Ｂを結ぶ線上では磁界の方向はほぼＸ方向で、点Ａよりも下側及び点Ｂよりも上側では磁界の方向がほぼＺ方向となる。
本例では、駆動用コイル１５を、図４（ｃ）に示すようなＸ方向の磁束密度が平坦な位置に配置し、第２の磁石１６Ｂを、図４（ｄ）に示すようなＺ方向の磁束密度が大きな位置に上辺と下辺とが位置するように配置すれば、駆動用コイル１５にほぼ＋Ｘ方向を向いた磁界を印加することができるとともに、第２の補助コイル１７Ｂの上辺に上向きの磁界を下辺に下向きの磁界を印加することができる。 Here, the magnetic field generated by each of the magnets 16A to 16D will be described using the second magnet 16B as an example. As shown in FIGS. 4A and 4B, the direction of the magnetic field is substantially in the X direction on a line connecting points A and B that are separated by a distance d in the X direction from both ends in the Z direction of the second magnet 16B. Below the point A and above the point B, the direction of the magnetic field is substantially the Z direction.
In this example, the driving coil 15 is arranged at a position where the magnetic flux density in the X direction is flat as shown in FIG. 4C, and the second magnet 16B is arranged in the Z direction as shown in FIG. If the upper and lower sides are arranged at a position where the magnetic flux density is large, a magnetic field substantially directed in the + X direction can be applied to the driving coil 15 and the upper side of the second auxiliary coil 17B faces upward. A downward magnetic field can be applied to the lower side of the magnetic field.

駆動用バネ部材１８Ａ，１８Ｂは、それぞれ、中央部に開口が形成された円環状の外周部１８ａと、円環状の内周部１８ｂと、外周部１８ａと内周部１８ｂとを連結する略円弧状の４本の腕部１８ｃとを備えており、外周部１８ａが係止部材１３のコイル保持部１３ｂの内周側の上部と下部とにそれぞれ固定され、内周部１８ｂがレンズホルダー１２の上側と下側とにそれぞれ固定される。４本の腕部１８ｃは、レンズホルダー１２を係止部材１３に懸架するバネとして機能する。
係止用バネ部材１９Ａ，１９Ｂは、図３（ｂ）にも示すように、中央部に開口が形成された正方形状の外周部１９ａと、円環状の内周部１９ｂと、外周部１９ａと内周部１９ｂとの間に配置される円環状の中間部１９ｃとを備え、内周部１９ｂと中間部１９ｃとが＋Ｙ側と−Ｙ側にてそれぞれ連結子１９ｍで連結され、外周部１９ａと中間部１９ｃとが＋Ｘ側と−Ｘ側にてそれぞれ連結子１９ｎで連結されている。外周部１９ａはケース１４に固定され、内周部１９ｂは係止部材１３に固定される。中間部１９ｃが係止部材１３をケース１４に懸架するバネとして機能する。
本例では、バネの変形を抑制するため、図３（ｂ）に示すように、中間部１９ｃの厚さを外周部１９ａと内周部１９ｂの厚さよりも厚くしているが、レンズホルダー１２の重さや係止部材１３の形状によっては、同じ厚さにしてもよい。 The drive spring members 18A and 18B are respectively substantially circular connecting an annular outer peripheral portion 18a having an opening at the center, an annular inner peripheral portion 18b, and an outer peripheral portion 18a and an inner peripheral portion 18b. The outer peripheral portion 18a is fixed to the upper and lower portions on the inner peripheral side of the coil holding portion 13b of the locking member 13, and the inner peripheral portion 18b is fixed to the lens holder 12. It is fixed to the upper side and the lower side, respectively. The four arm portions 18 c function as springs that suspend the lens holder 12 from the locking member 13.
As shown in FIG. 3B, the locking spring members 19A and 19B include a square outer peripheral portion 19a having an opening at the center, an annular inner peripheral portion 19b, and an outer peripheral portion 19a. An annular intermediate portion 19c disposed between the inner peripheral portion 19b, the inner peripheral portion 19b and the intermediate portion 19c are connected to each other by a connector 19m on the + Y side and the −Y side, and the outer peripheral portion 19a. And the intermediate portion 19c are connected by a connector 19n on the + X side and the -X side, respectively. The outer peripheral portion 19 a is fixed to the case 14, and the inner peripheral portion 19 b is fixed to the locking member 13. The intermediate portion 19 c functions as a spring that suspends the locking member 13 from the case 14.
In this example, in order to suppress the deformation of the spring, as shown in FIG. 3B, the thickness of the intermediate portion 19c is made larger than the thickness of the outer peripheral portion 19a and the inner peripheral portion 19b. Depending on the weight and the shape of the locking member 13, the thickness may be the same.

次に、本発明によるレンズ駆動装置１０の動作について説明する。
レンズホルダー１２を被写体方向（Ｚ軸方向）に移動させる、いわゆる自動焦点駆動の場合には、駆動用コイル１５に通電してレンズホルダー１２をＺ軸方向に移動させる。
駆動用コイル１５には、第１〜第４の磁石１６Ａ〜１６Ｄから電流の方向にほぼ直交する磁界が印加されているので、駆動用コイル１５に＋Ｚ軸方向時計回りの電流を流すと、駆動用コイル１５には、図１に示すような＋Ｚ側を向いたローレンツ力Ｆ_Lが発生する。したがって、レンズホルダー１２は＋Ｚ側に移動して、ローレンツ力Ｆ_Lと駆動用バネ部材１８Ａ，１８Ｂの復元力とが釣り合った位置に移動する。
レンズホルダー１２を−Ｚ側に移動させようとする場合には、駆動用コイル１５にＺ軸方向反時計回りの電流を流せばよい。 Next, the operation of the lens driving device 10 according to the present invention will be described.
In the case of so-called autofocus driving in which the lens holder 12 is moved in the subject direction (Z-axis direction), the driving coil 15 is energized to move the lens holder 12 in the Z-axis direction.
Since a magnetic field substantially orthogonal to the direction of current is applied to the drive coil 15 from the first to fourth magnets 16A to 16D, when a clockwise current in the + Z-axis direction is supplied to the drive coil 15, the drive coil 15 is driven. the use coil 15, the Lorentz force F _L is generated which faces the + Z side shown in FIG. Therefore, the lens holder 12 + moves to the Z side, moves to a position where the Lorentz force F _L and the driving spring member 18A, and the restoring force of 18B balanced.
In order to move the lens holder 12 to the −Z side, a current counterclockwise in the Z-axis direction may be supplied to the driving coil 15.

一方、手振れを抑制する場合には、第１〜第４の補助コイル１７Ａ〜１７Ｄのいずれかもしくは複数に通電する。
まず、レンズ１１やイメージセンサー２２に手振れが生じたか否かを図示しない角速度センサーにて検出する。手振れが生じている場合には、角速度センサーで検出した手振れの大きさと方向とを図示しない電流制御手段に送る。電流制御手段では、検出された手振れの大きさと方向に応じて、第１〜第４の補助コイル１７Ａ〜１７Ｄに通電する電流量と通電方向とを制御して、係止部材１３を揺動させて手振れを抑制する。
前述したように、第１〜第４の補助コイル１７Ａ〜１７Ｄの上側の辺には第１〜第４の磁石１６Ａ〜１６Ｄからの上向きの磁界が印加され、下側の辺に下向きの磁界が印加される。したがって、例えば、レンズ１１やイメージセンサー２２を支持または保持する係止部材１３を、図１の左側（−Ｘ方向）に移動させるような手振れが生じた場合には、第１及び第２の補助コイル１７Ａ，１７Ｂのいずれか一方または両方に、図１に示すようなＸ軸方向反時計回りの電流を流せばよい。これにより、第１及び第２の補助コイル１７Ａ，１７Ｂには＋Ｘ方向を向いたローレンツ力Ｆ_cが発生して係止部材１３を右側（＋Ｘ方向）に揺動させるので、係止部材１３を左側に移動させるような手振れを抑制できる。
なお、係止部材１３を右側に移動させるような手振れが生じた場合には、第１及び第２の補助コイル１７Ａ，１７Ｂのいずれか一方または両方に、Ｘ軸方向時計回りの電流を流せばよい。
また、係止部材１３を図２の上側（＋Ｙ側）もしくは下側（−Ｙ側）に移動させるような手振れが生じた場合には、第３及び第４の補助コイル１７Ｃ，１７Ｄのいずれか一方または両方に、Ｙ軸方向反時計回りもしくはＹ軸方向時計回りの電流を流せばよい。
したがって、レンズ１１やイメージセンサー２２に手振れが生じた場合には、第１〜第４の補助コイル１７Ａ〜１７Ｄに流す電流の方向と大きさとを制御して係止部材１３をＸＹ平面内で移動させるようにすれば、手振れを効果的に抑制することができる。
なお、第１〜第４の補助コイル１７Ａ〜１７Ｄの上側の辺のみを第１〜第４の磁石１６Ａ〜１６Ｄの上端部近傍に位置させたり、下側の辺のみを第１〜第４の磁石１６Ａ〜１６Ｄの下端部近傍に位置させても、係止部材１３をＸＹ平面内で移動させたり、Ｚ軸に直交する軸周りに回転させることができる。 On the other hand, in order to suppress camera shake, current is supplied to one or more of the first to fourth auxiliary coils 17A to 17D.
First, whether or not camera shake has occurred in the lens 11 or the image sensor 22 is detected by an angular velocity sensor (not shown). If camera shake has occurred, the magnitude and direction of camera shake detected by the angular velocity sensor are sent to a current control means (not shown). The current control means controls the amount of current to be supplied to the first to fourth auxiliary coils 17A to 17D and the direction of supply in accordance with the detected magnitude and direction of the camera shake, thereby swinging the locking member 13. To suppress camera shake.
As described above, the upward magnetic field from the first to fourth magnets 16A to 16D is applied to the upper side of the first to fourth auxiliary coils 17A to 17D, and the downward magnetic field is applied to the lower side. Applied. Therefore, for example, when a camera shake occurs that moves the locking member 13 that supports or holds the lens 11 or the image sensor 22 to the left side (−X direction) in FIG. A current counterclockwise in the X-axis direction as shown in FIG. 1 may be supplied to one or both of the coils 17A and 17B. As a result, a Lorentz force F _c directed in the + X direction is generated in the first and second auxiliary coils 17A and 17B, and the locking member 13 is swung to the right (+ X direction). Camera shake that moves to the left side can be suppressed.
In addition, when a hand movement that causes the locking member 13 to move to the right side occurs, if a current clockwise in the X-axis direction is supplied to one or both of the first and second auxiliary coils 17A and 17B, Good.
Further, when a camera shake occurs that moves the locking member 13 to the upper side (+ Y side) or the lower side (−Y side) in FIG. 2, one of the third and fourth auxiliary coils 17C and 17D. One or both may be supplied with a current counterclockwise in the Y-axis direction or clockwise in the Y-axis direction.
Accordingly, when camera shake occurs in the lens 11 or the image sensor 22, the direction and magnitude of the current flowing through the first to fourth auxiliary coils 17A to 17D are controlled to move the locking member 13 within the XY plane. By doing so, camera shake can be effectively suppressed.
In addition, only the upper side of the first to fourth auxiliary coils 17A to 17D is positioned near the upper end of the first to fourth magnets 16A to 16D, or only the lower side is set to the first to fourth. Even when the magnets 16A to 16D are positioned in the vicinity of the lower ends, the locking member 13 can be moved in the XY plane or rotated around an axis orthogonal to the Z axis.

また、第１及び第２の補助コイル１７Ａ，１７ＢのＺ軸方向の位置を上側の係止用バネ部材１９Ａ寄りに配置し、電流の方向を上記と同じくＸ軸方向反時計回りとすれば、第１の補助コイル１７Ａには−Ｚ方向を向いたローレンツ力Ｆ_cが発生し、第２の補助コイル１７Ｂには＋Ｚ方向を向いたローレンツ力Ｆ_cが発生するので、レンズホルダー１２をＹ軸方向時計回り（図１における右回り）に回転させることができる。逆に、第１及び第２の補助コイル１７Ａ，１７ＢのＺ軸方向の位置を下側の係止用バネ部材１９Ｂ寄りに配置すれば、レンズホルダー１２を図１のＹ軸方向反時計回り（図１における左回り）に回転させることができる。
同様に、第３及び第４の補助コイル１７Ｃ，１７ＤのＺ軸方向の位置を上側の係止用バネ部材１９Ａ寄りに配置したり、下側の係止用バネ部材１９Ｂ寄りに配置すれば、レンズホルダー１２をＸ軸方向反時計回りに回転させたり、Ｘ軸方向時計回りに回転させたりすることができる。
したがって、第１〜第４の補助コイル１７Ａ〜１７Ｄの位置をＺ軸方向にずらして配置することで、係止部材１３をＺ軸に直交する軸周りに回転させることができる。
このように、本発明によるレンズ駆動装置１０では、駆動用コイル１５に通電せずレンズホルダー１２が係止部材１３の突き出し部１３Ｔに当接した状態であっても、駆動用コイル１５に通電してレンズホルダー１２が係止部材１３の突き出し部１３Ｔを離れた状態でであっても、第１〜第４の補助コイル１７Ａ〜１７Ｄに通電する電流の方向と大きさとを制御することで、レンズホルダー１２をＸＹ平面内で移動させたり、Ｚ軸に直交する軸周りに回転させたりすることができる。 Further, if the position of the first and second auxiliary coils 17A, 17B in the Z-axis direction is arranged closer to the upper locking spring member 19A, and the current direction is the X-axis direction counterclockwise as described above, Lorentz force F _c is generated which faces the -Z direction in the first auxiliary coil 17A, because the Lorentz force F _c which faces the + Z direction in the second auxiliary coil 17B is generated, the lens holder 12 Y axis It can be rotated clockwise (clockwise in FIG. 1). Conversely, if the position of the first and second auxiliary coils 17A, 17B in the Z-axis direction is arranged closer to the lower locking spring member 19B, the lens holder 12 is rotated counterclockwise in the Y-axis direction in FIG. It can be rotated counterclockwise in FIG.
Similarly, if the positions of the third and fourth auxiliary coils 17C, 17D in the Z-axis direction are arranged closer to the upper locking spring member 19A or closer to the lower locking spring member 19B, The lens holder 12 can be rotated counterclockwise in the X-axis direction or rotated clockwise in the X-axis direction.
Therefore, by disposing the positions of the first to fourth auxiliary coils 17A to 17D in the Z-axis direction, the locking member 13 can be rotated around an axis orthogonal to the Z-axis.
Thus, in the lens driving device 10 according to the present invention, the driving coil 15 is energized even when the lens holder 12 is in contact with the protruding portion 13T of the locking member 13 without energizing the driving coil 15. Even when the lens holder 12 is away from the protrusion 13T of the locking member 13, the lens direction can be controlled by controlling the direction and magnitude of the current supplied to the first to fourth auxiliary coils 17A to 17D. The holder 12 can be moved in the XY plane or rotated around an axis orthogonal to the Z axis.

なお、前記実施の形態１では、第１〜第４の補助コイル１７Ａ〜１７Ｄの上側の辺を第１〜第４の磁石１６Ａ〜１６Ｄの上端部近傍に、下側の辺を第１〜第４の磁石１６Ａ〜１６Ｄの下端部近傍に位置させることで、係止部材１３をＸＹ平面内で移動させたり、Ｚ軸に直交する軸周りに回転させたりしたが、左右の辺（Ｚ軸方向に延長する辺）を第１〜第４の磁石１６Ａ〜１６Ｄの左右の両端部に位置させて通電させれば、第１〜第４の補助コイル１７Ａ〜１７Ｄの上側の辺や下側の辺が第１〜第４の磁石１６Ａ〜１６Ｄの下端部近傍になくても、係止部材１３をＸＹ平面内で遥動させることができる。
また、第１〜第４の補助コイル１７Ａ〜１７Ｄの各辺が必ずしも第１〜第４の磁石１６Ａ〜１６Ｄの端部近傍に位置する必要はなく、上辺のみ、または、下辺のみ、または、左右の辺のみを第１〜第４の磁石１６Ａ〜１６Ｄの端部近傍に位置させてもよい。
また、前記例では、駆動用磁石１６として、板面に垂直な方向に磁化された第１〜第４の磁石１６Ａ〜１６Ｄを用いたが、図５に示すように、駆動用コイル１５に空隙を隔てて対向する側が全て同極（ここでは、Ｎ極）になるよう配置された三角柱状の磁石１６ａ〜１６ｄを用いた構成のレンズ駆動装置１０Ｔを用いても、同様の効果を得ることができる。なお、この場合には、ケース１４に代えて、＋Ｚ軸から見たときの頂点の位置がＸ軸上及びＹ軸上にあるような、ケース１４を４５°回転したケース１４Ｔを用いればよい。
また、前記例では、係止用バネ部材１９Ａ，１９Ｂをケース１４の上側と下側とに配置したが、上側と下側のいずれか一方のみとしてもよい。 In the first embodiment, the upper side of the first to fourth auxiliary coils 17A to 17D is in the vicinity of the upper end portion of the first to fourth magnets 16A to 16D, and the lower side is set to the first to first sides. Although the locking member 13 is moved in the XY plane or rotated around an axis orthogonal to the Z axis by being positioned in the vicinity of the lower ends of the four magnets 16A to 16D, the left and right sides (Z axis direction 1) to the left and right ends of the first to fourth magnets 16A to 16D and energized, the upper side and the lower side of the first to fourth auxiliary coils 17A to 17D However, even if the first to fourth magnets 16A to 16D are not near the lower ends, the locking member 13 can be swung in the XY plane.
In addition, each side of the first to fourth auxiliary coils 17A to 17D does not necessarily have to be positioned near the end of the first to fourth magnets 16A to 16D, only the upper side, only the lower side, or left and right Only the side may be positioned near the ends of the first to fourth magnets 16A to 16D.
In the above example, the first to fourth magnets 16 A to 16 D magnetized in the direction perpendicular to the plate surface are used as the drive magnets 16, but as shown in FIG. The same effect can be obtained even if the lens driving device 10T having the configuration using the triangular columnar magnets 16a to 16d arranged so that all the sides facing each other with the same polarity (N pole in this case) are used. it can. In this case, instead of the case 14, a case 14T obtained by rotating the case 14 by 45 ° so that the position of the apex when viewed from the + Z axis is on the X axis and the Y axis may be used.
In the above example, the locking spring members 19A and 19B are arranged on the upper and lower sides of the case 14, but only one of the upper and lower sides may be provided.

また、図６に示すように、駆動用磁石１６を構成する第１〜第４の磁石１６Ａ〜１６Ｄの外側にそれぞれ磁気ヨーク２３を配設した構成のレンズ駆動装置１０Ｙを用いれば、補助駆動用コイル１７を構成する第１〜第４の補助コイル１７Ａ〜１７Ｄの上辺と下辺とにそれぞれ印加される上向き及び下向きの磁界の強度を高めることができるので、レンズホルダー１２を効率よくＸＹ平面内で移動させたりＺ軸に直交する軸周りに回転させたりすることができる。
図７（ａ）は、Ｘ軸方向もしくはＹ軸方向から見たときの、磁石１６ｊ（第１〜第４の磁石１６Ａ〜１６Ｄのいずれか）と磁気ヨーク２３との関係を示す図で、磁気ヨーク２３は、磁石１６ｊの＋Ｚ側と−Ｚ側とをそれぞれ覆う板状の水平片２３ａと、＋Ｘ側と−Ｘ側もしくは＋Ｙ側と−Ｙ側とをそれぞれ覆う板状の垂直片２３ｂとを備えた磁石１６ｊ側が開口する箱状の部材で、水平片２３ａと垂直片２３ｂとにより、磁石１６のＺ軸方向の縁部から外に広がる磁界を磁気ヨーク２３内に導くことで、第１〜第４の補助コイル１７Ａ〜１７Ｄの４辺にそれぞれ印加される外向きの磁界の強度を高めることができる。
なお、図７（ｂ）に示すように、垂直片２３ｂを省略した、断面コの字状の磁気ヨーク２３Ｋを用いてもよい。
また、駆動用磁石１６や補助駆動用コイル１７の配置や大きさ等によっては、図６に示すように、駆動用磁石１６と磁気ヨーク２３との間に非磁性体からスペーサー１６Ｎを設けて、第１〜第４の補助コイル１７Ａ〜１７Ｄの上辺と下辺とにそれぞれ印加される上向き及び下向きの磁界の強度を調整することが好ましい。
なお、前記実施の形態１では、イメージセンサー２２を装着したカメラモジュール基板２１をケース１４に取付けたが、これらを係止部材１３に取付けてもよい。 Further, as shown in FIG. 6, if a lens driving device 10Y having a configuration in which a magnetic yoke 23 is disposed outside each of the first to fourth magnets 16A to 16D constituting the driving magnet 16 is used, it is for auxiliary driving. Since the strengths of the upward and downward magnetic fields applied to the upper and lower sides of the first to fourth auxiliary coils 17A to 17D constituting the coil 17 can be increased, the lens holder 12 can be efficiently moved in the XY plane. It can be moved or rotated around an axis perpendicular to the Z axis.
FIG. 7A is a diagram showing the relationship between the magnet 16j (any one of the first to fourth magnets 16A to 16D) and the magnetic yoke 23 when viewed from the X-axis direction or the Y-axis direction. The yoke 23 includes a plate-like horizontal piece 23a that covers the + Z side and the −Z side of the magnet 16j, and a plate-like vertical piece 23b that covers the + X side and the −X side or the + Y side and the −Y side, respectively. It is a box-shaped member that opens on the side of the magnet 16j provided, and the horizontal piece 23a and the vertical piece 23b guide the magnetic field that spreads outward from the edge in the Z-axis direction of the magnet 16 into the magnetic yoke 23. The strength of the outward magnetic field applied to each of the four sides of the fourth auxiliary coils 17A to 17D can be increased.
As shown in FIG. 7B, a magnetic yoke 23K having a U-shaped cross section in which the vertical piece 23b is omitted may be used.
Further, depending on the arrangement and size of the drive magnet 16 and the auxiliary drive coil 17, as shown in FIG. 6, a spacer 16N is provided from a non-magnetic material between the drive magnet 16 and the magnetic yoke 23. It is preferable to adjust the strengths of the upward and downward magnetic fields applied to the upper and lower sides of the first to fourth auxiliary coils 17A to 17D, respectively.
In the first embodiment, the camera module substrate 21 on which the image sensor 22 is mounted is attached to the case 14, but these may be attached to the locking member 13.

実施の形態２．
前記実施の形態１では、係止部材１３に補助駆動用コイル１７を設けて係止部材１３をＸＹ平面内で移動させたりＺ軸と直交する軸周りに回転させるようにしたが、図８（ａ），（ｂ）及び図９に示すように、駆動用コイルとして、Ｘ軸周り及びＹ軸周りに巻き回された第１〜第４の駆動用コイル２５Ａ〜２５Ｄを用いるとともに、駆動用磁石として、＋Ｚ側に配置される第１〜第４の上側磁石２６Ａ〜２６Ｄと、第１〜第４の上側磁石２６Ａ〜２６Ｄとは異なる極性を有する第１〜第４の下側磁石２７Ａ〜２７Ｄとを備えたレンズ駆動装置１０Ｄを用いれば、補助駆動用コイル１７を用いることなく、係止部材１３をＸＹ平面内で揺動させたりＺ軸と直交する軸周りに回転させることができる。
なお、レンズ駆動装置１０Ｄでは、レンズホルダー１２は上側と下側とで、駆動用バネ部材１８Ａ，１８Ｂにより、係止部材１３に懸架支持され、係止部材１３は下側で、下側の係止用バネ部材１９Ｂにより、ケース１４に懸架支持されている。 Embodiment 2. FIG.
In the first embodiment, the auxiliary driving coil 17 is provided on the locking member 13 so that the locking member 13 is moved in the XY plane or rotated around an axis orthogonal to the Z axis. As shown in a), (b) and FIG. 9, as the driving coil, first to fourth driving coils 25A to 25D wound around the X axis and the Y axis are used, and a driving magnet is used. The first to fourth upper magnets 26A to 26D arranged on the + Z side and the first to fourth lower magnets 27A to 27D having different polarities from the first to fourth upper magnets 26A to 26D. Is used, the locking member 13 can be swung in the XY plane or rotated around an axis orthogonal to the Z axis without using the auxiliary driving coil 17.
In the lens driving device 10D, the lens holder 12 is suspended and supported on the locking member 13 by the driving spring members 18A and 18B on the upper side and the lower side, and the locking member 13 is on the lower side and on the lower side. The case 14 is suspended and supported by a stop spring member 19B.

第１〜第４の駆動用コイル２５Ａ〜２５Ｄの上辺と下辺とは、詳細には、レンズホルダー１２側の形状がレンズホルダー１２の周面に沿うように弧状に形成されて、レンズホルダー１２に装着される。
第１の駆動用コイル２５Ａはレンズホルダー１２の＋Ｘ側に装着され、第２の駆動用コイル２５Ｂはレンズホルダー１２の−Ｘ側に装着される。また、第３の駆動用コイル２５Ｃはレンズホルダー１２の＋Ｙ側に装着され、第４の駆動用コイル２５Ｄはレンズホルダー１２の−Ｙ側に装着される。
第１〜第４の上側磁石２６Ａ〜２６Ｄは板面に垂直な方向に磁化されて、それぞれ、第１〜第４の駆動用コイル２５Ａ〜２５Ｄの上辺側に空隙を隔てて対向するように配置される。一方、第１〜第４の下側磁石２７Ａ〜２７Ｄは、それぞれ第１〜第４の上側磁石２６Ａ〜２６Ｄとは逆極性に磁化されて、それぞれ、第１〜第４の駆動用コイル２５Ａ〜２５Ｄの下辺側に空隙を隔てて対向するように配置される。
本例では、第１〜第４の上側磁石２６Ａ〜２６Ｄを、第１〜第４の駆動用コイル２５Ａ〜２５Ｄ側の面が全てＮ極となるように配置し、第１〜第４の下側磁石２７Ａ〜２７Ｄを、第１〜第４の駆動用コイル２５Ａ〜２５Ｄ側の面が全てＳ極となるよう配置した。 Specifically, the upper side and the lower side of the first to fourth drive coils 25 A to 25 D are formed in an arc shape so that the shape on the lens holder 12 side is along the peripheral surface of the lens holder 12. Installed.
The first driving coil 25A is mounted on the + X side of the lens holder 12, and the second driving coil 25B is mounted on the −X side of the lens holder 12. The third driving coil 25C is mounted on the + Y side of the lens holder 12, and the fourth driving coil 25D is mounted on the −Y side of the lens holder 12.
The first to fourth upper magnets 26A to 26D are magnetized in a direction perpendicular to the plate surface, and are arranged so as to face the upper sides of the first to fourth driving coils 25A to 25D with a gap therebetween, respectively. Is done. On the other hand, the first to fourth lower magnets 27A to 27D are magnetized to have opposite polarities to the first to fourth upper magnets 26A to 26D, respectively, and the first to fourth driving coils 25A to 25A to 25D, respectively. It arrange | positions so that the space | interval may be opposed to the lower side of 25D.
In this example, the first to fourth upper magnets 26A to 26D are arranged so that the surfaces on the first to fourth drive coils 25A to 25D side are all N poles, and the first to fourth lower magnets are arranged. The side magnets 27 A to 27 D are arranged so that the surfaces on the first to fourth drive coils 25 A to 25 D side are all S poles.

次に、本発明によるレンズ駆動装置１０Ｄの動作について説明する。
レンズホルダー１２を被写体方向（Ｚ軸方向）に移動させる自動焦点駆動をさせる場合には、第１の駆動用コイル２５ＡにＸ軸方向反時計回りの電流を流し第２の駆動用コイル２５ＢにＸ軸方向時計回りの電流を流すか、もしくは、第３の駆動用コイル２５ＣにＹ軸方向反時計回りの電流を流し第４の駆動用コイル２５ＤにＹ軸方向時計回りの電流を流すことで、レンズホルダー１２を被写体側である＋Ｚ側に移動させることができる。
すなわち、第１〜第４の駆動用コイル２５Ａ〜２５Ｄの上辺にはそれぞれレンズホルダー１２側に向かう磁界が印加され、下辺にはそれぞれケース１４側に向かう磁界が印加されるので、第１の駆動用コイル２５ＡにはＸ軸方向反時計回りの電流を、第２の駆動用コイル２５ＢにはＸ軸方向時計回りの電流を、第３の駆動用コイル２５ＣにはＹ軸方向反時計回りの電流を、第４の駆動用コイル２５ＤにＹ軸方向時計回りの電流を流せば、第１〜第４の駆動用コイル２５Ａ〜２５Ｄのそれぞれに上向きのローレンツ力を発生させることができる。
レンズホルダー１２を−Ｚ側に移動させるには、第１〜第４の駆動用コイル２５Ａ〜２５Ｄの通電方向を逆にすればよい。 Next, the operation of the lens driving device 10D according to the present invention will be described.
In the case of performing auto-focus driving for moving the lens holder 12 in the subject direction (Z-axis direction), a current counterclockwise in the X-axis direction is supplied to the first driving coil 25A and X is supplied to the second driving coil 25B. By flowing an axial clockwise current, or by passing a Y-axis counterclockwise current through the third drive coil 25C and a Y-axis clockwise current through the fourth drive coil 25D, The lens holder 12 can be moved to the subject side + Z side.
That is, a magnetic field directed toward the lens holder 12 is applied to the upper sides of the first to fourth drive coils 25A to 25D, and a magnetic field directed to the case 14 is applied to the lower sides, respectively. X-axis counterclockwise current for the coil 25A, X-axis clockwise current for the second drive coil 25B, and Y-axis counterclockwise current for the third drive coil 25C. If a current clockwise in the Y-axis direction is supplied to the fourth driving coil 25D, an upward Lorentz force can be generated in each of the first to fourth driving coils 25A to 25D.
In order to move the lens holder 12 to the -Z side, the energization directions of the first to fourth drive coils 25A to 25D may be reversed.

一方、手振れを抑制する場合には、第１〜第４の駆動用コイル２５Ａ〜２５Ｄのいずれかもしくは複数に通電する。
例えば、第１及び第２の駆動用コイル２５Ａ，２５ＢにそれぞれＸ軸方向反時計回りの電流を流せば、レンズホルダー１２を係止部材１３の突き出し部１３Ｔに当接させた状態でＹ軸周りに左回転させることができる。
また、第１の駆動用コイル２５ＡにＸ軸方向反時計回りの電流を流し、第２の駆動用コイル２５Ｂに第１の駆動用コイル２５Ａに流す電流とは異なる大きさのＸ軸方向時計回りの電流を流せば、レンズホルダー１２を＋Ｚ側に移動させつつＹ軸周りに回転させることができる。第１の駆動用コイル２５Ａに流す電流が第２の駆動用コイル２５Ｂに流す電流よりも大きければ、レンズホルダー１２は＋Ｚ側に移動しつつＹ軸周りに左回転し、小さければ＋Ｚ側に移動しつつＹ軸周りに右回転する。 On the other hand, in order to suppress camera shake, current is supplied to one or more of the first to fourth drive coils 25A to 25D.
For example, if a current counterclockwise in the X-axis direction is supplied to the first and second drive coils 25A and 25B, the lens holder 12 is in contact with the protruding portion 13T of the locking member 13 and is rotated around the Y-axis. Can be rotated to the left.
Further, an X-axis direction counterclockwise current is supplied to the first drive coil 25A, and an X-axis direction clockwise rotation having a magnitude different from the current supplied to the second drive coil 25B is supplied to the first drive coil 25A. If the current is applied, the lens holder 12 can be rotated around the Y axis while moving to the + Z side. If the current flowing through the first driving coil 25A is larger than the current flowing through the second driving coil 25B, the lens holder 12 rotates to the left around the Y axis while moving to the + Z side, and if smaller, moves to the + Z side. While rotating right around the Y axis.

同様に、第３及び第４の駆動用コイル２５Ｃ，２５ＤにそれぞれＹ軸方向反時計回りの電流を流せば、レンズホルダー１２を係止部材１３の突き出し部１３Ｔに当接させた状態でＸ軸周りに右回転させることができる。
また、第３の駆動用コイル２５ＣにＹ軸方向反時計回りの電流を流し、第４の駆動用コイル２５Ｄに第３の駆動用コイル２５Ｃに流す電流とは異なる大きさのＹ軸方向時計回りの電流を流せば、レンズホルダー１２を＋Ｚ側に移動させつつＸ軸周りに回転させることができる。第３の駆動用コイル２５Ｃに流す電流が第４の駆動用コイル２５Ｄに流す電流よりも大きければ、レンズホルダー１２は＋Ｚ側に移動しつつＸ軸周りに右回転し、小さければＸ軸周りに左回転する。
このように、第１〜第４の駆動用コイル２５Ａ〜２５Ｄのいずれかもしくは複数に通電する電流の方向と大きさとを適宜制御すれば、レンズホルダー１２が係止部材１３の突き出し部１３Ｔに当接していても当接もしていなくても、レンズホルダー１２をＺ軸に直交する軸周りに回転させることができる。 Similarly, if a current counterclockwise in the Y-axis direction is supplied to the third and fourth drive coils 25C and 25D, the X-axis is in a state where the lens holder 12 is in contact with the protruding portion 13T of the locking member 13. Can rotate right around.
Also, a Y-axis counterclockwise current is passed through the third drive coil 25C, and a Y-axis clockwise run of a magnitude different from the current passed through the fourth drive coil 25D through the third drive coil 25C. When the current is applied, the lens holder 12 can be rotated around the X axis while moving to the + Z side. If the current flowing through the third driving coil 25C is larger than the current flowing through the fourth driving coil 25D, the lens holder 12 rotates to the right around the X axis while moving to the + Z side, and if smaller, around the X axis. Rotate left.
In this way, if the direction and magnitude of the current applied to one or more of the first to fourth drive coils 25A to 25D are appropriately controlled, the lens holder 12 will contact the protruding portion 13T of the locking member 13. The lens holder 12 can be rotated around an axis orthogonal to the Z axis, whether in contact or not.

実施の形態３．
前記実施の形態１，２では、レンズホルダー１２を上下の駆動用バネ部材１８Ａ，１８Ｂで係止部材１３に懸架支持したが、図１０に示すように、レンズホルダー１２を一方の駆動用バネ部材（ここでは、下側の駆動用バネ部材１８Ｂ）で係止部材３３に懸架支持するとともに、他方の駆動用バネ部材（ここでは、上側の駆動用バネ部材１８Ａ）でケース３４に懸架支持した構成のレンズ駆動装置３０を用いても、レンズホルダー１２が係止部材３３の突き出し部３３Ｔに当接した状態でも突き出し部３３Ｔから離れた状態でも、レンズホルダー１２をＺ軸に直交する軸周りに回転させることができる。
レンズ駆動装置３０は、レンズ１１を保持するレンズホルダー１２と、係止部材３３と、ケース３４と、駆動用コイル１５と、駆動用磁石１６と、補助駆動用コイル３５と、補助駆動用磁石３６と、駆動用バネ部材１８Ａ，１８Ｂと、係止用バネ部材１９Ｂとを備える。図１０に示すように、電磁駆動装置３０にイメージセンサー２２と図示しない電流制御手段とが搭載または接続されて、被写体の撮影とレンズホルダー１２の駆動及び手振れ抑制の制御がなされる。
レンズ駆動装置３０を構成する部材で実施の形態１と同一の部材については同符号とし、その説明を省略する。 Embodiment 3 FIG.
In the first and second embodiments, the lens holder 12 is suspended and supported on the locking member 13 by the upper and lower driving spring members 18A and 18B. However, as shown in FIG. (Here, the lower drive spring member 18B) is suspended and supported by the locking member 33, and the other drive spring member (here, the upper drive spring member 18A) is suspended and supported by the case 34. Even when the lens driving device 30 is used, the lens holder 12 is rotated about an axis orthogonal to the Z-axis regardless of whether the lens holder 12 is in contact with the protruding portion 33T of the locking member 33 or away from the protruding portion 33T. Can be made.
The lens driving device 30 includes a lens holder 12 that holds the lens 11, a locking member 33, a case 34, a driving coil 15, a driving magnet 16, an auxiliary driving coil 35, and an auxiliary driving magnet 36. And driving spring members 18A and 18B and a locking spring member 19B. As shown in FIG. 10, an image sensor 22 and current control means (not shown) are mounted on or connected to the electromagnetic drive device 30 to control photographing of a subject, driving of the lens holder 12, and suppression of camera shake.
The members constituting the lens driving device 30 that are the same as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

係止部材３３は、レンズホルダー１２の被写体側とは反対側に配置されてレンズホルダー１２に当接する円筒状の突き出し部３３Ｔと、突き出し部３３Ｔの周面から径方向に突出する円盤状のフランジ部３３ａと、フランジ３３ａの外縁部に設けられて補助駆動用コイル３５を装着するため補助コイル装着部３３ｂとを備える。
また、係止部材３３は、補助コイル装着部３３ｂの内周側にて、駆動用バネ部材１８Ｂによりレンズホルダー１２を被写体側である＋Ｚ側に移動可能に懸架支持するとともに、突き出し部３３Ｔにより、レンズホルダー１２を＋Ｚ側にＰ₀だけオフセットさせる。したがって、駆動用バネ部材１８Ｂの復元力により、レンズホルダー１２には、常に下方に引き戻される力が付勢される。
ケース３４は、底部に開口部を有する上側が開放された箱状の部材で、Ｘ軸またはＹ軸に直交する４つの側面の内側の駆動用コイル１５に対向する箇所にはそれぞれ駆動用磁石１６を保持するための第１の凹部３４ａが形成され、係止部材３３の補助コイル装着部３３ｂに装着される補助駆動用コイル３５に対向する箇所にはそれぞれ補助駆動用磁石３６を取付けるための第２の凹部３４ｂが形成されている。
また、ケース３４は、係止部材３３の外側に配置され、係止用バネ部材１９Ｂにより、突き出し部３３Ｔの下端側において係止部材３３を遥動可能に懸架支持するとともに、駆動用バネ部材１８Ａによりレンズホルダー１２を被写体側である＋Ｚ側に移動可能に懸架支持する。 The locking member 33 is disposed on the opposite side to the subject side of the lens holder 12 and has a cylindrical protruding portion 33T that contacts the lens holder 12, and a disc-shaped flange that protrudes in the radial direction from the peripheral surface of the protruding portion 33T. A portion 33a and an auxiliary coil mounting portion 33b provided on the outer edge portion of the flange 33a for mounting the auxiliary driving coil 35 are provided.
The locking member 33 suspends and supports the lens holder 12 so as to be movable to the subject side + Z side by the driving spring member 18B on the inner peripheral side of the auxiliary coil mounting portion 33b, and by the protruding portion 33T, The lens holder 12 is offset by P ₀ to the + Z side. Therefore, the lens holder 12 is always biased by a downward pulling force by the restoring force of the driving spring member 18B.
The case 34 is a box-like member having an opening at the bottom and an open upper side. The drive magnets 16 are provided at locations facing the drive coils 15 on the inside of the four side surfaces orthogonal to the X axis or the Y axis. The first concave portion 34a for holding the auxiliary drive magnet 36 is formed, and the first drive magnet 36 for attaching the auxiliary drive magnet 36 to each of the portions facing the auxiliary drive coil 35 attached to the auxiliary coil attachment portion 33b of the locking member 33 is formed. Two recesses 34b are formed.
The case 34 is disposed outside the locking member 33, and the locking spring member 19B suspends and supports the locking member 33 on the lower end side of the protruding portion 33T so as to be able to swing, and the driving spring member 18A. Thus, the lens holder 12 is suspended and supported so as to be movable toward the subject side + Z side.

補助駆動用コイル３５は、Ｘ軸周りに巻き回されて補助コイル装着部３３ｂの＋Ｘ側及び−Ｘ側に配置される第１及び第２の補助コイル３５Ａ，３５Ｂを備える。
補助駆動用磁石３６は、第１の補助コイル３５Ａに空隙を隔てて対向するように設けられた第１の補助磁石３６Ａと、第２の補助コイル３５Ｂに空隙を隔てて対向するように設けられた第２の補助磁石３６Ｂとを備える。第１及び第２の補助磁石３６Ａ，３６Ｂはそれぞれ、上側に配置される上側磁石３６Ｕと、上側磁石３６Ｕとは異なる極性を有し上側磁石３６Ｕの下側に配置される下側磁石３６Ｄとを備え、上側磁石３６Ｕが第１及び第２の補助コイル３５Ａ，３５Ｂの上辺に対向する位置に配置され、下側磁石３６Ｄが第１及び第２の補助コイル３５Ａ，３５Ｂの下辺に対向する位置に配置される。 The auxiliary driving coil 35 includes first and second auxiliary coils 35A and 35B which are wound around the X axis and are arranged on the + X side and the −X side of the auxiliary coil mounting portion 33b.
The auxiliary driving magnet 36 is provided so as to face the first auxiliary coil 35A with a gap therebetween, and the first auxiliary magnet 36A provided with a gap therebetween. And a second auxiliary magnet 36B. Each of the first and second auxiliary magnets 36A, 36B includes an upper magnet 36U disposed on the upper side and a lower magnet 36D having a polarity different from that of the upper magnet 36U and disposed on the lower side of the upper magnet 36U. Provided, the upper magnet 36U is disposed at a position facing the upper sides of the first and second auxiliary coils 35A, 35B, and the lower magnet 36D is disposed at a position facing the lower sides of the first and second auxiliary coils 35A, 35B. Be placed.

次に、レンズ駆動装置３０の動作について説明する。
レンズホルダー１２を自動焦点駆動する場合は、実施の形態１と同様に、駆動用コイル１５に通電してレンズホルダー１２をＺ軸方向に移動させる。
一方、手振れを抑制する場合には、例えば、第１及び第２の補助駆動用コイル３５Ａ，３５ＢにＸ軸方向反時計回りの電流を流して、第１の補助駆動用コイル３５Ａに上向きのローレンツ力を発生させ、第２の補助駆動用コイル３５Ｂに下向きのローレンツ力を発生させるようにすれば、レンズホルダー１２をＹ軸周りに左回転させることができる。
すなわち、第１の補助駆動用コイル３５Ａの上辺には第１の補助磁石３６Ａの上側磁石３６Ｕから−Ｘ方向の磁界が印加され、下辺には第１の補助磁石３６Ａの下側磁石３６Ｄから＋Ｘ方向の磁界が印加されるので、第１の補助駆動用コイル３５Ａには上向きのトルクが作用する。一方、第２の補助駆動用コイル３５Ｂの上辺には第２の補助磁石３６Ｂの上側磁石３６Ｕから＋Ｘ方向の磁界が印加され、下辺には第２の補助磁石３６Ａの下側磁石３６Ｄから−Ｘ方向の磁界が印加されるので、第２の補助駆動用コイル３５Ｂには下向きのトルクが作用する。その結果、レンズホルダー１２はＹ軸周りに左回転する。
一方、第１及び第２の補助駆動用コイル３５Ａ，３５ＢにＸ軸方向時計回りの電流を流すと、第１の補助駆動用コイル３５Ａには下向きのローレンツ力が作用し、第２の補助駆動用コイル３５Ｂには上向きのローレンツ力が作用するので、レンズホルダー１２はＹ軸周りに右回転する。
なお、レンズホルダー１２をＸ軸周りに回転させるには、第１の補助コイル３５Ａと第１の補助磁石３６Ａの組と、第２の補助コイル３５Ｂと第２の補助磁石３６Ｂの組とに相当する補助コイルと補助磁石の組を、第１及び第２の補助コイル３５Ａ，３５Ｂと第１及び第２の補助磁石３６Ａ，３６Ｂに対してそれぞれ９０°回転した位置（＋Ｙ側と−Ｙ側と）に配設する構成とすればよい。
また、Ｘ軸方向にはＸ軸周りに巻き回された補助コイルを配置し、Ｙ軸方向にはＹ軸周りに巻き回された補助コイルを配置するとともに、ケース３４の前記補助コイルに対向する位置に、前記上側磁石３６Ｕと下側磁石３６Ｄと同様の上側磁石と下側磁石とを備えた補助磁石を配置すれば、レンズホルダー１２をＺ軸に直交する軸周りに回転させることができる。 Next, the operation of the lens driving device 30 will be described.
When the lens holder 12 is automatically focused, the driving coil 15 is energized to move the lens holder 12 in the Z-axis direction as in the first embodiment.
On the other hand, in order to suppress camera shake, for example, a current flowing counterclockwise in the X-axis direction is passed through the first and second auxiliary drive coils 35A and 35B, and an upward Lorentz is supplied to the first auxiliary drive coil 35A. If a force is generated to generate a downward Lorentz force in the second auxiliary driving coil 35B, the lens holder 12 can be rotated to the left around the Y axis.
That is, a magnetic field in the −X direction is applied to the upper side of the first auxiliary driving coil 35A from the upper magnet 36U of the first auxiliary magnet 36A, and the lower side 36D of the first auxiliary magnet 36A is applied to + X. Since a directional magnetic field is applied, upward torque acts on the first auxiliary driving coil 35A. On the other hand, a magnetic field in the + X direction is applied from the upper magnet 36U of the second auxiliary magnet 36B to the upper side of the second auxiliary driving coil 35B, and -X from the lower magnet 36D of the second auxiliary magnet 36A to the lower side. Since a directional magnetic field is applied, a downward torque acts on the second auxiliary driving coil 35B. As a result, the lens holder 12 rotates counterclockwise around the Y axis.
On the other hand, when a clockwise current in the X-axis direction is passed through the first and second auxiliary drive coils 35A and 35B, a downward Lorentz force acts on the first auxiliary drive coil 35A, and the second auxiliary drive Since an upward Lorentz force acts on the coil 35B, the lens holder 12 rotates clockwise around the Y axis.
In order to rotate the lens holder 12 around the X axis, it corresponds to a set of the first auxiliary coil 35A and the first auxiliary magnet 36A, and a set of the second auxiliary coil 35B and the second auxiliary magnet 36B. Positions of the auxiliary coil and auxiliary magnet to be rotated by 90 ° with respect to the first and second auxiliary coils 35A and 35B and the first and second auxiliary magnets 36A and 36B (+ Y side and −Y side) ) May be arranged.
Further, an auxiliary coil wound around the X axis is disposed in the X axis direction, and an auxiliary coil wound around the Y axis is disposed in the Y axis direction, and is opposed to the auxiliary coil of the case 34. If an auxiliary magnet having an upper magnet and a lower magnet similar to the upper magnet 36U and the lower magnet 36D is arranged at the position, the lens holder 12 can be rotated around an axis orthogonal to the Z axis.

図１１は、駆動用コイル１５に通電してレンズホルダー１２を係止部材３３の突き出し部３３Ｔから離れた状態にて第１及び第２の補助駆動用コイル３５Ａ，３５Ｂに通電してレンズホルダー１２を回転させた例を示す図である。
レンズホルダー１２が浮上したときに第１及び第２の補助駆動用コイル３５Ａ，３５Ｂに通電すると、第１及び第２の補助駆動用コイル３５Ａ，３５Ｂに生じたローレンツ力がトルクとなってレンズホルダー１２を回転させることができる。
一方、駆動用コイル１５に通電せずレンズホルダー１２が係止部材３３の突き出し部３３Ｔに当接している状態にて第１及び第２の補助駆動用コイル３５Ａ，３５Ｂに通電しても、レンズホルダー１２は係止部材３３側に付勢されているので、図１２に示すように、レンズホルダー１２を係止部材３３に当接させつつ回転させることができる。 In FIG. 11, the lens holder 12 is energized by energizing the driving coil 15 and energizing the first and second auxiliary driving coils 35 A and 35 B in a state where the lens holder 12 is separated from the protrusion 33 T of the locking member 33. It is a figure which shows the example which rotated.
When the first and second auxiliary driving coils 35A and 35B are energized when the lens holder 12 floats, the Lorentz force generated in the first and second auxiliary driving coils 35A and 35B becomes torque and the lens holder 12 can be rotated.
On the other hand, even if the first and second auxiliary driving coils 35A and 35B are energized while the lens holder 12 is in contact with the protruding portion 33T of the locking member 33 without energizing the driving coil 15, the lens Since the holder 12 is biased toward the locking member 33, the lens holder 12 can be rotated while contacting the locking member 33 as shown in FIG. 12.

なお、前記実施の形態３では、第１及び第２の補助磁石３６Ａ，３６Ｂとして、上側磁石３６Ｕと下側磁石３６Ｄとを備えた補助磁石を用いたが、図１３に示すように、レンズ駆動装置として、第１及び第２の補助磁石３６Ａ，３６Ｂに代えて、第１及び第２の補助駆動用コイル３５Ａ，３５Ｂの下辺に対向する位置に駆動用磁石１６と同じ極性の第３の補助磁石３６Ｃを配置するとともに、凸部３８ａを備えた磁気ヨーク３８を設けた構成のレンズ駆動装置３０Ｙを用いてもよい。
磁気ヨーク３８の凸部３８ａは、駆動用磁石１６のケース３４側から第３の補助磁石３６Ｃのケース３４側まで延長する板状の基部３８ｂから第１及び第２の補助駆動用コイル３５Ａ，３５Ｂ側に突出するように設けられている。
凸部３８ａの下端は第３の補助磁石３６Ｃの上面に接触し、上端は第１及び第２の補助駆動用コイル３５Ａ，３５Ｂの上辺よりも上側に位置している。
これにより、前記実施の形態３と同様に、補助駆動用コイル３５Ａの上辺には＋Ｘ方向の磁界が印加され、下辺には−Ｘ方向の磁界が印加されるとともに、補助駆動用コイル３５Ｂの上辺には−Ｘ方向の磁界が印加され、下辺には＋Ｘ方向の磁界が印加されるので、レンズホルダー１２をＹ軸周りに回転させることができる。
なお、本例では、磁気ヨーク３８の凸部３８ａの上面と駆動用磁石１６の下面との間にスペーサー３９を設けて、駆動用磁石１６を下側から支持するようにしている。 In the third embodiment, as the first and second auxiliary magnets 36A and 36B, auxiliary magnets having an upper magnet 36U and a lower magnet 36D are used. However, as shown in FIG. As a device, instead of the first and second auxiliary magnets 36A and 36B, a third auxiliary having the same polarity as that of the driving magnet 16 at a position facing the lower sides of the first and second auxiliary driving coils 35A and 35B. A lens driving device 30Y having a configuration in which a magnet 36C is disposed and a magnetic yoke 38 having a convex portion 38a is provided may be used.
The convex portion 38a of the magnetic yoke 38 extends from the plate-like base portion 38b extending from the case 34 side of the driving magnet 16 to the case 34 side of the third auxiliary magnet 36C, and the first and second auxiliary driving coils 35A and 35B. It is provided so as to protrude to the side.
The lower end of the convex portion 38a is in contact with the upper surface of the third auxiliary magnet 36C, and the upper end is located above the upper sides of the first and second auxiliary driving coils 35A and 35B.
Thus, as in the third embodiment, a magnetic field in the + X direction is applied to the upper side of the auxiliary driving coil 35A, a magnetic field in the -X direction is applied to the lower side, and the upper side of the auxiliary driving coil 35B. Since a magnetic field in the −X direction is applied to and a magnetic field in the + X direction is applied to the lower side, the lens holder 12 can be rotated around the Y axis.
In this example, a spacer 39 is provided between the upper surface of the convex portion 38a of the magnetic yoke 38 and the lower surface of the driving magnet 16 so as to support the driving magnet 16 from the lower side.

図１４（ａ），（ｂ）は、Ｚ軸周りに巻き回された補助駆動用コイルを用いたレンズ駆動装置４０の一例を示す図で、（ａ）図は−Ｙ側から見たときの縦断面図、（ｂ）図は−Ｘ側から見たときの縦断面図である。また、図１５は、レンズ駆動装置４０に用いられる補助駆動用コイルと補助磁石との関係を示す図である
レンズ駆動装置４０では、第１及び第２の補助駆動用コイル３５Ａ，３５Ｂに代えて、Ｚ軸周りに巻き回された上側補助駆動用コイル４５ＵとＺ軸周りに巻き回されて上側補助駆動用コイル４５Ｕの下側に配置された下側補助駆動用コイル４５Ｄを係止部材３３に装着するとともに、ケース３４の上側補助駆動用コイル４５Ｕに対向する位置の＋Ｘ側と−Ｘ側とにそれぞれ同じ方向（ここでは、−Ｘ方向）に磁化された第１及び第２の上側補助磁石４６Ａ，４６Ｂを配置し、ケース３４の下側補助駆動用コイル４５Ｄに対向する位置の＋Ｙ側と−Ｙ側とにそれぞれ同じ方向（ここでは、＋Ｙ方向）に磁化された第１及び第２の下側補助磁石４６Ｃ，４６Ｄを配している。
第１及び第２の上側補助磁石４６Ａ，４６ＢのＺ方向の中心位置と第１及び第２の下側補助磁石４６Ｃ，４６ＤのＺ方向の中心位置とは、図１５に示すように、上側補助駆動用コイル４５Ｕの中心位置と下側補助駆動用コイル４５Ｄの中心位置との差に相当する距離ｈだけ離れている。 FIGS. 14A and 14B are views showing an example of a lens driving device 40 using an auxiliary driving coil wound around the Z axis, and FIG. 14A is a view when viewed from the −Y side. A longitudinal sectional view, (b) is a longitudinal sectional view when viewed from the -X side. FIG. 15 is a diagram showing the relationship between auxiliary driving coils and auxiliary magnets used in the lens driving device 40. In the lens driving device 40, instead of the first and second auxiliary driving coils 35A and 35B. The locking member 33 includes the upper auxiliary driving coil 45U wound around the Z axis and the lower auxiliary driving coil 45D wound around the Z axis and disposed below the upper auxiliary driving coil 45U. First and second upper auxiliary magnets that are mounted and magnetized in the same direction (here, the -X direction) on the + X side and the -X side of the case 34 facing the upper auxiliary driving coil 45U. 46A and 46B are disposed, and the first and second magnets magnetized in the same direction (here, the + Y direction) on the + Y side and the −Y side at positions facing the lower auxiliary driving coil 45D of the case 34, respectively. Lower auxiliary magnet Stones 46C and 46D are arranged.
The center position in the Z direction of the first and second upper auxiliary magnets 46A and 46B and the center position in the Z direction of the first and second lower auxiliary magnets 46C and 46D are as shown in FIG. It is separated by a distance h corresponding to the difference between the center position of the drive coil 45U and the center position of the lower auxiliary drive coil 45D.

このような構成を採ることにより、上側補助駆動用コイル４５ＵにＺ軸周り時計方向の電流を流すと、上側補助駆動用コイル４５Ｕの第１の上側補助磁石４６Ａ側には上向きのローレンツ力が発生し、第２の上側補助磁石４６Ｂ側には下向きのローレンツ力が発生するので、レンズホルダー１２はＹ軸周りに左回りに回転する。逆に、上側補助駆動用コイル４５ＵにＺ軸周り反時計方向の電流を流すとレンズホルダー１２はＹ軸周りに右回りに回転する。
一方、下側補助駆動用コイル４５ＤにＺ軸周り時計方向の電流を流すと、下側補助駆動用コイル４５Ｄの第１の下側補助磁石４６Ｃ側には下向きのローレンツ力が発生し、第２の下側補助磁石４６Ｄ側には上向きのローレンツ力が発生するので、レンズホルダー１２はＸ軸周りに左回りに回転する。
下側補助駆動用コイル４５ＤにＺ軸周り反時計方向の電流を流すとレンズホルダー１２はＸ軸周りに右回りに回転する。
したがって、上側補助駆動用コイル４５Ｕと下側補助駆動用コイル４５Ｄに通電する電流の方向と大きさとを適宜制御すれば、レンズホルダー１２をＺ軸に直交する軸周りに回転させることができる。 By adopting such a configuration, when a current in the clockwise direction around the Z-axis is passed through the upper auxiliary driving coil 45U, an upward Lorentz force is generated on the first upper auxiliary magnet 46A side of the upper auxiliary driving coil 45U. Since a downward Lorentz force is generated on the second upper auxiliary magnet 46B side, the lens holder 12 rotates counterclockwise around the Y axis. Conversely, when a counterclockwise current around the Z axis is passed through the upper auxiliary driving coil 45U, the lens holder 12 rotates clockwise around the Y axis.
On the other hand, when a clockwise current around the Z-axis is passed through the lower auxiliary driving coil 45D, a downward Lorentz force is generated on the first lower auxiliary magnet 46C side of the lower auxiliary driving coil 45D. Since an upward Lorentz force is generated on the lower auxiliary magnet 46D side, the lens holder 12 rotates counterclockwise around the X axis.
When a counterclockwise current around the Z axis is passed through the lower auxiliary drive coil 45D, the lens holder 12 rotates clockwise around the X axis.
Therefore, the lens holder 12 can be rotated about an axis orthogonal to the Z axis by appropriately controlling the direction and magnitude of the current supplied to the upper auxiliary driving coil 45U and the lower auxiliary driving coil 45D.

以上、本発明を実施の形態を用いて説明したが、本発明の技術的範囲は前記実施の形態に記載の範囲には限定されない。前記実施の形態に、多様な変更または改良を加えることが可能であることが当業者にも明らかである。そのような変更または改良を加えた形態も本発明の技術的範囲に含まれ得ることが、特許請求の範囲から明らかである。 As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the embodiment. It is apparent from the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

１０レンズ駆動装置、１１レンズ、１２レンズホルダー、１３係止部材、
１４ケース、１５駆動用コイル、１６駆動用磁石、１７補助駆動用コイル、
１８Ａ，１８Ｂ駆動用バネ部材、１９Ａ，１９Ｂ係止用バネ部材、
２１カメラモジュール基板、２２イメージセンサー。 10 lens driving device, 11 lens, 12 lens holder, 13 locking member,
14 cases, 15 driving coils, 16 driving magnets, 17 auxiliary driving coils,
18A, 18B Driving spring member, 19A, 19B Locking spring member,
21 Camera module board, 22 Image sensor.

Claims

A lens holder for holding the lens, a driving coil wound around the outer periphery of the lens holder, a case as a fixing member, and held by the case so as to face the driving coil with a gap. A lens driving device including a driving magnet disposed;
A locking member disposed on the side opposite to the subject side of the lens holder and contacting the lens holder;
The locking member is suspended and supported by a locking spring member so as to be swingable with respect to the case,
A lens driving device characterized in that the lens holder is movable to the subject side with respect to the locking member by a driving spring member, and is urged toward the opposite side of the subject side to be suspended and supported.

The lens driving device according to claim 1, wherein an auxiliary driving coil is attached to the locking member.

The lens driving device according to claim 2, wherein the auxiliary driving coil is disposed in the driving magnet with a gap.

The lens driving device according to claim 2, further comprising an auxiliary driving magnet disposed in the auxiliary driving coil with a gap.

The lens driving device according to claim 4, wherein a magnetic yoke is disposed outside the auxiliary driving magnet.

When the subject side is the front in the Z-axis direction,
The driving coil includes at least one pair of coils provided so as to face each other across the lens holder and wound in a direction perpendicular to the Z-axis direction,
The drive magnet includes a first magnet disposed forward in the Z-axis direction, and a second magnet having a polarity different from that of the first magnet and disposed rearward in the Z-axis direction. The lens driving device according to claim 1, wherein: