JP2007101627A - Automatic focus adjustment method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic focus adjustment method that makes it possible to adjust optical members with high accuracy, having lenses of different optical characteristics and freely displaced in three-dimensional directions. <P>SOLUTION: An operation member 3 is a cam member, having cam parts 5 and 6 corresponding to the optical members 1 and 2. The came parts 5 and 6 have a first cam face 7 formed around the support shaft 3a of the operation member 3 and used to retract the optical members 1 and 2 respectively to their retracted positions; and a second cam face 8 for adjusting the focus of the optical members 1 and 2 at the position of an optical axis. The second cam face 8 has an inclining part 82, formed in a face perpendicular to the support shaft 3a and inclining along the circumference. The declining face 82b of the inclining part 82 in the direction in which the operation member 3 is driven has a focus adjustment area, where focus adjustment is made. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、携帯端末等に搭載されるカメラモジュールにおける焦点の自動調整方法に関する。   The present invention relates to a method for automatically adjusting a focus in a camera module mounted on a portable terminal or the like.

従来、レンズを光軸上の位置と光軸から外れた位置とに切り換えることにより、単一のレンズを用いて倍率の変更を行うようにしたカメラモジュールは公知である（例えば、特許文献１）。また、焦点距離の異なる複数のレンズを選択的に切り換えることにより、倍率の変更を行うようにしたカメラモジュールも公知である（例えば、特許文献２）。
特開平６−１０２５７２号公報 特許第２６５７１０４号明細書 2. Description of the Related Art Conventionally, a camera module is known in which a magnification is changed using a single lens by switching a lens between a position on the optical axis and a position off the optical axis (for example, Patent Document 1). . A camera module is also known in which a magnification is changed by selectively switching a plurality of lenses having different focal lengths (for example, Patent Document 2).
JP-A-6-102572 Japanese Patent No. 2657104

近時は、携帯電話機等のいわゆる携帯端末にもカメラモジュールが搭載され、簡易に撮影を行えるようになったが、撮影モードの多様化や撮影技術の高度化、高品質化等の要請に応えるために、例えば、倍率変更と焦点調整を適宜選択して行えるようなモード変換機能が追求されるようになった。しかし、上記従来のカメラモジュール（特許文献１，２等）は焦点調整機能を備えていない。   Recently, so-called mobile terminals such as mobile phones have also been equipped with camera modules that allow easy shooting, but respond to demands for diversified shooting modes, advanced shooting techniques, and higher quality. For this reason, for example, a mode conversion function has been pursued so that magnification change and focus adjustment can be appropriately selected. However, the conventional camera modules (Patent Documents 1, 2, etc.) do not have a focus adjustment function.

倍率変更に加えて焦点調整を可能とするためには、特性の異なるレンズをそれぞれ有する複数の光学部材を、光軸に沿う方向及び光軸と交差する方向に変位自在となるように各独立に支持させなければならない。そして、鮮明な画像を得るためには精度の高い焦点調整が必要とされ、そのためには、各光学部材を焦点位置に高い精度で設定できなければならない。   In order to enable focus adjustment in addition to changing the magnification, a plurality of optical members each having a lens with different characteristics can be independently displaced so as to be displaceable in a direction along the optical axis and in a direction crossing the optical axis. Must be supported. In order to obtain a clear image, high-precision focus adjustment is required. For this purpose, each optical member must be set at a focus position with high accuracy.

本発明は、このような実情に鑑みてなされ、それぞれ光学的な特性の異なるレンズを備えて三次元方向に変位自在な光学部材を高い精度で焦点調整できるようにする焦点の自動調整方法を提供することを目的とする。   The present invention has been made in view of such circumstances, and provides an automatic focus adjustment method that enables high-precision focus adjustment of an optical member that is provided with lenses having different optical characteristics and that can be displaced in a three-dimensional direction. The purpose is to do.

（１）本発明に係る焦点の自動調整方法は、光学的な特性がそれぞれ異なるレンズを備えて光軸に沿う方向及び光軸と交差する方向に各独立に変位自在に支持される複数の光学部材を、前記光軸に対応する光軸位置と前記光軸から外れた退避位置とにそれぞれ独立に変位させる操作部材が、単一の駆動手段によって駆動され、前記操作部材は、前記光学部材を前記光軸位置と前記退避位置とに変位させるための第一カム面と、前記支軸と交差する面で構成され前記光学部材を前記光軸位置にて焦点調整するための第二カム面とを備え、該第二カム面は、前記支軸と交差する面内に周方向に沿って傾斜する傾斜部を有するカメラモジュールにおける焦点の自動調整方法であって、前記傾斜部における前記操作部材の駆動方向の下り斜面に焦点調整領域を設定し、該焦点調整領域にて焦点調整を行うことを特徴とする。   (1) The method for automatically adjusting a focus according to the present invention includes a plurality of optical elements that are provided with lenses having different optical characteristics and are independently displaced in a direction along the optical axis and a direction intersecting the optical axis. An operating member for independently displacing the member to an optical axis position corresponding to the optical axis and a retracted position deviating from the optical axis is driven by a single driving means, and the operating member moves the optical member to A first cam surface for displacing to the optical axis position and the retracted position, and a second cam surface for adjusting the focus of the optical member at the optical axis position. The second cam surface is a method of automatically adjusting a focus in a camera module having an inclined portion inclined along a circumferential direction in a plane intersecting the support shaft, and the second cam surface includes Focus on the down slope in the driving direction Set the region, and performs focus adjustment by said focus adjustment area.

上記のように構成されるカメラモジュールは、カム部が操作部材の支軸周りに形成され、光学部材を退避位置に退避させるための第一カム面と、光学部材を光軸位置で焦点調整するための第二カム面と、を備えているので、操作部材を単一の駆動手段によって（例えば、反時計回りに）駆動させることにより、特性の異なるレンズを光軸に対して出退させるように各光学部材を変位させることで倍率変更を行うことができ、また、レンズが光軸上に位置する光軸位置にて、光学部材を光軸に沿って変位させることで焦点調整を行うことができる。   In the camera module configured as described above, the cam portion is formed around the support shaft of the operation member, and the first cam surface for retracting the optical member to the retracted position and the optical member at the optical axis position are adjusted in focus. And a second cam surface for driving the operating member by a single driving means (for example, counterclockwise) so that lenses having different characteristics can be moved back and forth with respect to the optical axis. It is possible to change the magnification by displacing each optical member and to adjust the focus by displacing the optical member along the optical axis at the optical axis position where the lens is positioned on the optical axis. Can do.

このようなカメラモジュールでは、光学部材を光軸に沿う方向と光軸と交差する方向との両方の方向に変位させるには、駆動手段の駆動方向は光学部材が光軸位置から退避位置に移動する方向に一致させる必要がある。この場合、第二カム面における操作部材の駆動方向の上り斜面に光学部材（のカムフォロワー）を付勢状態で当接させている過程（領域）では、斜面から受ける摩擦抵抗が大となるため、光学部材が退避方向に移動しようとし、焦点調整中に光軸から外れることも懸念されるが、この方法のように、操作部材の駆動方向の下り斜面に焦点調整領域を設定すれば、その下り斜面では光学部材との摩擦抵抗が軽減されるため、その焦点調整領域において光学部材が光軸から外れにくくなり、安定した焦点調整が可能となる。なお、操作部材の駆動方向は、例えば、反時計回りに設定してもよく、時計回りに設定してもよいが、いずれにしても、光学部材が光軸位置から退避位置に向かう方向に一致させる必要がある。   In such a camera module, in order to displace the optical member in both the direction along the optical axis and the direction intersecting the optical axis, the optical member moves from the optical axis position to the retracted position. It is necessary to match with the direction to do. In this case, in the process (region) in which the optical member (cam follower) is brought into contact with the upward slope in the driving direction of the operation member on the second cam surface, the frictional resistance received from the slope is large. The optical member tends to move in the retracting direction, and there is a concern that the optical member may deviate from the optical axis during focus adjustment, but if a focus adjustment region is set on the downward slope in the driving direction of the operation member as in this method, Since the frictional resistance with the optical member is reduced on the down slope, the optical member is less likely to be off the optical axis in the focus adjustment region, and stable focus adjustment is possible. The driving direction of the operation member may be set, for example, counterclockwise or clockwise, but in any case, the optical member coincides with the direction from the optical axis position toward the retracted position. It is necessary to let

（２）前記光学部材を前記傾斜部における上り斜面から下り斜面に移動させた後、一旦、前記光学部材を少なくとも前記下り斜面の前記焦点調整領域の下端まで移動させた後に前記操作部材を逆転させ、前記光学部材が前記下り斜面を上る過程で焦点調整するようにしてもよい。このようにすれば、操作部材を一時的に逆転させるので、その際、光学部材は退避位置から光軸位置に向かう方向に付勢されることとなり、摩擦抵抗に拘わらず焦点調整時に光学部材が退避しようとすることがなくなる。   (2) After the optical member is moved from the ascending slope to the descending slope in the inclined portion, the optical member is once moved at least to the lower end of the focus adjustment region on the descending slope, and then the operation member is reversed. The focus may be adjusted in the process in which the optical member goes up the down slope. In this way, since the operation member is temporarily reversed, the optical member is urged in the direction from the retracted position toward the optical axis position, and the optical member is adjusted during focus adjustment regardless of the frictional resistance. No longer trying to evacuate.

（３）前記第一カム面と第二カム面は、前記操作部材の両端に形成され、２つの異なる操作モード下において前記第二カム面に設定された焦点調整領域でそれぞれ焦点調整を行うようにしてもよい。このようにすれば、単一の操作部材によって、例えば、テレ操作モードとワイド操作モードの両方でそれぞれ同様の方法によって焦点調整を行うことができる。   (3) The first cam surface and the second cam surface are formed at both ends of the operation member, and focus adjustment is performed in a focus adjustment region set on the second cam surface under two different operation modes. It may be. In this way, the focus adjustment can be performed by the same method using a single operation member, for example, in both the tele operation mode and the wide operation mode.

本発明の焦点の自動調整方法によれば、第二カム面の傾斜部における操作部材の駆動方向の下り斜面に焦点調整領域を設定するので、光学部材が傾斜部から受ける摩擦抵抗を低く抑えることができ、その焦点調整領域において光学部材が光軸から外れにくくなり、安定した焦点調整が可能となる。   According to the automatic focus adjustment method of the present invention, the focus adjustment region is set on the downward slope in the drive direction of the operation member in the inclined portion of the second cam surface, so that the frictional resistance that the optical member receives from the inclined portion is kept low. In this focus adjustment region, the optical member is less likely to be off the optical axis, and stable focus adjustment is possible.

また、操作部材を一旦逆転させて前記下り斜面を上る過程で焦点調整を行うようにすれば、光学部材は退避位置から光軸位置に向かう方向に付勢されることとなり、摩擦抵抗に拘わらず焦点調整時に光学部材が退避しようとすることがなくなる。   Also, if the operating member is reversed once and the focus adjustment is performed in the process of climbing the descending slope, the optical member is biased in the direction from the retracted position toward the optical axis position, regardless of the frictional resistance. The optical member does not attempt to retract during focus adjustment.

本発明の最良の形態に係る焦点の自動調整方法について図面を参照しつつ詳細に説明する。   An automatic focus adjustment method according to the best mode of the present invention will be described in detail with reference to the drawings.

図１は、光学部材１，２を操作するための操作部材３のカム面の展開図、図２及び図３は光軸位置にある光学部材１と操作部材３の対応状態を示し（他方の光学部材２は退避位置にある）、図２は焦点調整動作時、図３は焦点調整動作以外時の状態を示す。この焦点の自動調整方法は、図２及び図３に示すように、光学的な特性がそれぞれ異なるレンズを備えて光軸に沿う方向及び光軸と交差する方向に各独立に変位自在となるように支軸１１に支持される上下一対の光学部材１，２を、そのレンズ１ａ（他方の符号は省略）が光軸に対応する光軸位置と光軸から外れた退避位置（図２に二点鎖線で示す）とに各独立に変位させる操作部材３が、単一の駆動手段（図示省略）によって駆動されるようにしたカメラモジュールに適用される。   FIG. 1 is a development view of the cam surface of the operating member 3 for operating the optical members 1 and 2, and FIGS. 2 and 3 show the correspondence between the optical member 1 and the operating member 3 at the optical axis position (the other side). The optical member 2 is in the retracted position), FIG. 2 shows a state during the focus adjustment operation, and FIG. 3 shows a state other than the focus adjustment operation. As shown in FIGS. 2 and 3, this automatic focus adjustment method includes lenses having different optical characteristics so that they can be independently displaced in the direction along the optical axis and in the direction intersecting the optical axis. A pair of upper and lower optical members 1 and 2 supported by a support shaft 11 are arranged such that an optical axis position corresponding to the optical axis of the lens 1a (the other reference is omitted) and a retracted position where the lens 1a deviates from the optical axis (see FIG. The operation members 3 that are displaced independently of each other (shown by dotted lines) are applied to a camera module that is driven by a single drive means (not shown).

その操作部材３は、各光学部材１，２に対応したカム部５，６を備え、カム部５，６は、操作部材３の光軸に沿う方向に立設されてステップモータ等からなる駆動手段によって制御駆動される支軸３ａの周りに上下にほぼ対称に形成され、光学部材１，２を退避位置に退避させるために支軸３ａに沿う面内に形成される第一カム面７（他方の符号は省略）と、光学部材１，２を光軸位置で焦点調整するための第二カム面８（他方の符号は省略）と、光学部材１，２を支軸３ａに沿う方向に位置規制するために第一カム面７の周りに支軸３ａに交差する面内に形成される第三カム面９（他方の符号は省略）と、を備え、第二カム面８は、支軸３ａと交差する面内に周方向に沿って平坦部８１と傾斜部８２を有し、傾斜部８２は、上り斜面８２ａと下り斜面８２ｂとからなる。   The operation member 3 includes cam portions 5 and 6 corresponding to the optical members 1 and 2, and the cam portions 5 and 6 are erected in a direction along the optical axis of the operation member 3 and are driven by a step motor or the like. A first cam surface 7 (formed in a plane substantially symmetrical up and down around the support shaft 3a controlled and driven by the means, and formed in a plane along the support shaft 3a in order to retract the optical members 1 and 2 to the retracted position. The other sign is omitted), the second cam surface 8 for adjusting the focus of the optical members 1 and 2 at the optical axis position (the other sign is omitted), and the optical members 1 and 2 in the direction along the support shaft 3a. In order to regulate the position, a third cam surface 9 (the other symbol is omitted) formed in a plane intersecting the support shaft 3a around the first cam surface 7 is provided. A flat portion 81 and an inclined portion 82 are provided along a circumferential direction in a plane intersecting the shaft 3a, and the inclined portion 82 is an upward inclined surface 82a. Consisting of a downward slope 82b.

光学部材１，２は、上述のように、光軸に沿う方向及び光軸と交差（直交）する方向に各独立に変位自在となるように、光軸に沿う方向に立設された支軸１１に支持され、かつ、その光学部材１，２の端末部間に掛張された引張スプリング１０によって、光学部材１，２が共に光軸方向に付勢されている。また、光学部材１，２のアーム基部にはフォロア部１ｃ，２ｃが設けられ、そのフォロア部１ｃ，２ｃには、第二カム面８に付勢当接するカムフォロワーと、第三カム面９に付勢当接するカムフォロワーが設けられている。なお、第一カム面７には、フォロア部１ｃ，２ｃの側端部が付勢当接する。   As described above, the optical members 1 and 2 are support shafts erected in the direction along the optical axis so as to be independently displaceable in the direction along the optical axis and in the direction intersecting (orthogonal) with the optical axis. 11 and the optical members 1 and 2 are both urged in the optical axis direction by a tension spring 10 that is supported between the end portions of the optical members 1 and 2. The arm bases of the optical members 1 and 2 are provided with follower portions 1c and 2c. The follower portions 1c and 2c are provided with a cam follower that is in urging contact with the second cam surface 8 and a third cam surface 9 respectively. A cam follower for urging contact is provided. Note that the side end portions of the follower portions 1 c and 2 c are in urging contact with the first cam surface 7.

このように構成されるカメラモジュールは、操作部材３を、例えば、反時計回りに回転駆動させることにより、特性の異なるレンズを光軸に対して出退させるように各光学部材１，２を（光軸位置と退避位置とに）変位させることで倍率変更を行うことができ、また、レンズを光軸位置にて、光学部材１，２を光軸に沿って変位させることで焦点調整を行うことができる。   In the camera module configured as described above, each of the optical members 1 and 2 is moved so that the lens having different characteristics is moved out and with respect to the optical axis by rotating the operation member 3 counterclockwise, for example ( The magnification can be changed by displacing (to the optical axis position and the retracted position), and the focus is adjusted by displacing the optical members 1 and 2 along the optical axis at the optical axis position. be able to.

このようなカメラモジュールでは、カム部５を例にとって説明すると、前述したように、第二カム面８における操作部材３の駆動方向の上り斜面８２ａに光学部材１のカムフォロワーを付勢当接させている過程（領域）では、斜面から受ける摩擦抵抗が大となるため、光学部材１が光軸位置から退避位置に向かって移動しようとし、焦点調整中に光軸から外れることも懸念される。そこで、本焦点の自動調整方法では、図１に示すように、第二カム面８の傾斜部８２における操作部材３の駆動方向（回転方向）の下り斜面８２ｂに焦点調整領域ＦＡ（Ｔ，テレ側），ＦＡ（Ｗ，ワイド側）を設定し、該焦点調整領域ＦＡ（Ｔ），ＦＡ（Ｗ）にて焦点調整を行うようにしている。この方法のように、操作部材３の駆動方向の下り斜面８２ｂに焦点調整領域ＦＡ（Ｔ），ＦＡ（Ｗ）を設定すれば、その下り斜面８２ｂから受ける摩擦抵抗は、上り斜面８２ａから受ける摩擦抵抗よりも大幅に低減されるため、その焦点調整領域において光学部材１が光軸から外れにくくなり、安定した焦点調整が可能となる。   In such a camera module, the cam portion 5 will be described as an example. As described above, the cam follower of the optical member 1 is urged and brought into contact with the ascending slope 82a in the driving direction of the operation member 3 on the second cam surface 8. In this process (region), the frictional resistance received from the slope increases, so that the optical member 1 tends to move from the optical axis position toward the retracted position, and there is a concern that the optical member 1 may deviate from the optical axis during focus adjustment. Thus, in the automatic focus adjustment method, as shown in FIG. 1, the focus adjustment area FA (T, telephoto) is formed on the down slope 82b in the drive direction (rotation direction) of the operation member 3 in the inclined portion 82 of the second cam surface 8. Side) and FA (W, wide side) are set, and focus adjustment is performed in the focus adjustment areas FA (T) and FA (W). If the focus adjustment areas FA (T) and FA (W) are set on the down slope 82b in the driving direction of the operation member 3 as in this method, the frictional resistance received from the down slope 82b is the friction received from the up slope 82a. Since the resistance is much lower than the resistance, the optical member 1 is less likely to be off the optical axis in the focus adjustment region, and stable focus adjustment is possible.

また、好ましくは、フォロア部１ｃ，２ｃを、傾斜部８２における上り斜面８２ａから下り斜面８２ｂに移動させた後、一旦、フォロア部１ｃ，２ｃを下り斜面８２ｂの焦点調整領域ＦＡ（Ｔ）の下端まで移動させた後に操作部材３を（例えば、時計回りに）逆転させ、フォロア部１ｃ，２ｃが下り斜面８２ｂを上る過程で焦点調整する。このようにすれば、操作部材３を一時的に逆転させるので、その際、光学部材１は退避位置から光軸位置に向かう方向に付勢されることとなり、焦点調整時に光学部材１が退避しようとすることがなくなり、より安定した焦点調整が可能となる。   Preferably, after the follower portions 1c and 2c are moved from the ascending slope 82a to the descending slope 82b in the inclined portion 82, the follower portions 1c and 2c are temporarily moved to the lower end of the focus adjustment area FA (T) of the descending slope 82b. Then, the operation member 3 is reversed (for example, clockwise), and the focus adjustment is performed in the process in which the follower portions 1c and 2c rise on the descending slope 82b. In this case, since the operation member 3 is temporarily reversed, the optical member 1 is biased in the direction from the retracted position toward the optical axis position, and the optical member 1 is retracted during focus adjustment. Thus, more stable focus adjustment is possible.

なお、以上はカム部５を例にとって説明したが、カム部６についても同様の方法が適用されており、同様の作用、効果を奏する。   Although the above description has been made by taking the cam portion 5 as an example, the same method is applied to the cam portion 6 and the same actions and effects are achieved.

次いで、このような焦点の自動調整方法を、図１を参照しつつ、光学部材１，２と操作部材３の一連の動作と共に、順を追って説明する。なお、便宜上、上方のカム部５を例にとり、フォロア部１ｃが、第一カム面７及び第三カム面９から第二カム面８へ移行する箇所を０°（基準点）として説明する。まず、０°においては、光学部材１は退避位置の終端にあり、フォロア部１ｃの側端部が第一カム面７に付勢当接し、かつ、一方のカムフォロワーが第三カム面９に付勢当接しており、光学部材１は支軸１１に沿う方向の位置規制が行われ他部材との当接干渉が防止される。   Next, such an automatic focus adjustment method will be described step by step together with a series of operations of the optical members 1 and 2 and the operation member 3 with reference to FIG. For convenience, the upper cam portion 5 is taken as an example, and the location where the follower portion 1c transitions from the first cam surface 7 and the third cam surface 9 to the second cam surface 8 will be described as 0 ° (reference point). First, at 0 °, the optical member 1 is at the end of the retracted position, the side end portion of the follower portion 1c is in urging contact with the first cam surface 7, and one cam follower is in contact with the third cam surface 9. The optical member 1 is positioned in the direction along the support shaft 11 so that contact interference with other members is prevented.

０°の位置から、操作部材３が反時計回りに回転すると、フォロア部１ｃの側端部は第一カム面７から外れ、かつ、一方のカムフォロワーが第三カム面９から離間し、他方のカムフォロワーが平坦部８１に当接してフォロア部１ｃが径方向内方に変位し、これに伴って、テレレンズ１ａが光軸に接近するように変位する。そして、操作部材３の回転開始から約６０°以内で、フォロア部１ｃが向きを変え、テレレンズ１ａが光軸上に挿入されて、光学部材１は光軸位置にある状態となる。   When the operation member 3 is rotated counterclockwise from the 0 ° position, the side end of the follower portion 1c is detached from the first cam surface 7, and one cam follower is separated from the third cam surface 9, and the other The cam follower comes into contact with the flat portion 81 and the follower portion 1c is displaced inward in the radial direction, and accordingly, the tele lens 1a is displaced so as to approach the optical axis. Then, within about 60 ° from the start of rotation of the operation member 3, the follower portion 1c changes its direction, the tele lens 1a is inserted on the optical axis, and the optical member 1 is in the optical axis position.

さらに操作部材３が反時計回りに回転すると、フォロア部１ｃが第二カム面８の上り斜面８２ａに至り約９０°の角度範囲に亘って該上り斜面８２ａに沿って頂部まで上昇する。この頂部は、約１５０°の角度位置にある。そして、フォロア部１ｃが、第二カム面８の下り斜面８２ｂに至り約３０°の角度範囲に亘って下り斜面８２ｂに沿って降下する。   Further, when the operation member 3 rotates counterclockwise, the follower portion 1c reaches the ascending slope 82a of the second cam surface 8 and rises to the top along the ascending slope 82a over an angle range of about 90 °. This top is at an angular position of about 150 °. Then, the follower portion 1c reaches the descending slope 82b of the second cam surface 8 and descends along the descending slope 82b over an angle range of about 30 °.

次いで、フォロア部１ｃが下り斜面８２ｂの焦点調整領域ＦＡ（Ｔ）の下端に到達すると、操作部材３を逆転させ、フォロア部１ｃが下り斜面８２ｂを上る過程で焦点調整を行う。このような上り過程で焦点調整を行えば、光学部材１，２が光軸から外れることがなく、フォロア部１ｃの動作が安定化するため、焦点位置をより確実に精度よく捉えることができる。   Next, when the follower portion 1c reaches the lower end of the focus adjustment area FA (T) of the downward slope 82b, the operation member 3 is reversed, and focus adjustment is performed in the process in which the follower portion 1c rises the downward slope 82b. If the focus adjustment is performed in such an ascending process, the optical members 1 and 2 are not deviated from the optical axis, and the operation of the follower portion 1c is stabilized, so that the focal position can be captured more reliably and accurately.

焦点調整が終了すると、操作部材３を正転させ、フォロア部１ｃを約１８０°の角度位置にある平坦部８１に移動させる。さらに、フォロア部１ｃは、約６０°の角度範囲に亘って、平坦部８１上を径方向外方に変位し、これに伴って、テレレンズ１ａが光軸から離脱するように変位する。また、フォロア部１ｃは、第二カム面８の終端を画する端面に当接し、該端面の端縁を支点として径方向外方に作用する力を受ける。   When the focus adjustment is completed, the operation member 3 is rotated forward, and the follower portion 1c is moved to the flat portion 81 at an angular position of about 180 °. Further, the follower portion 1c is displaced radially outward on the flat portion 81 over an angle range of about 60 °, and accordingly, the tele lens 1a is displaced so as to be separated from the optical axis. Further, the follower portion 1c abuts on an end surface that defines the end of the second cam surface 8, and receives a force acting radially outward with the edge of the end surface as a fulcrum.

その際に、フォロア部１ｃの一方のカムフォロワーが、第三カム面９の移行部に付勢当接した時点で、フォロア部１ｃが向きを変え、フォロア部１ｃの側端部が第一カム面７に付勢当接し、かつ一方のカムフォロワーが第三カム面９に移行しテレレンズ１ａが光軸から離脱して、光学部材１が退避位置に復帰する。   At that time, when one cam follower of the follower portion 1c comes into urging contact with the transition portion of the third cam surface 9, the follower portion 1c changes its direction, and the side end portion of the follower portion 1c is the first cam. The cam follower is brought into urging contact with the surface 7, and one cam follower moves to the third cam surface 9, the tele lens 1a is detached from the optical axis, and the optical member 1 returns to the retracted position.

なお、本発明は、実施の形態に限定されることなく、発明の要旨を逸脱しない限りにおいて、適宜、必要に応じて、設計変更や改良等を行うのは自由である。   It should be noted that the present invention is not limited to the embodiment, and it is free to make design changes and improvements as needed as long as they do not depart from the gist of the invention.

本発明に係る焦点の自動調整方法は、倍率変更機能や焦点調整機能という高度な機能を有するカメラモジュールに適用することができる。   The focus automatic adjustment method according to the present invention can be applied to a camera module having advanced functions such as a magnification change function and a focus adjustment function.

本発明の焦点の自動調整方法が適用されるカメラモジュールの操作部材のカムの展開図FIG. 4 is a development view of a cam of an operation member of a camera module to which the automatic focus adjustment method of the present invention is applied. 同焦点調整動作時の光学部材と操作部材の対応状態を示す構成説明図Configuration explanatory diagram showing the corresponding state of the optical member and the operation member during the same focus adjustment operation 同光軸位置にある光学部材と操作部材の焦点調整動作以外の対応状態を示す構成説明図Structure explanatory drawing which shows corresponding states other than the focus adjustment operation | movement of the optical member in the same optical axis position, and an operation member

符号の説明Explanation of symbols

１，２ 光学部材
１ａ レンズ
３ 操作部材
３ａ 支軸
５，６ カム部
７ 第一カム面
８ 第二カム面
９ 第三カム面
８２ 傾斜部
８２ａ 上り斜面
８２ｂ 下り斜面
ＦＡ（Ｔ），ＦＡ（Ｗ）…焦点調整領域
DESCRIPTION OF SYMBOLS 1, 2 Optical member 1a Lens 3 Operation member 3a Support shaft 5,6 Cam part 7 First cam surface 8 Second cam surface 9 Third cam surface 82 Inclination part 82a Up slope 82b Down slope FA (T), FA (W ) ... Focus adjustment area

Claims (3)

光学的な特性がそれぞれ異なるレンズを備えて光軸に沿う方向及び光軸と交差する方向にそれぞれ独立に変位自在に支持される複数の光学部材を、前記光軸に対応する光軸位置と前記光軸から外れた退避位置とにそれぞれ独立に変位させる操作部材が、単一の駆動手段によって駆動され、前記操作部材は、前記光学部材を前記光軸位置と前記退避位置とに変位させるための第一カム面と、前記操作部材の支軸と交差する面で構成され前記光学部材を前記光軸位置にて焦点調整するための第二カム面とを備え、該第二カム面は、前記支軸と交差する面内に周方向に沿って傾斜する傾斜部を有するカメラモジュールにおける焦点の自動調整方法であって、
前記傾斜部における前記操作部材の駆動方向の下り斜面に焦点調整領域を設定し、該焦点調整領域にて焦点調整を行うことを特徴とする焦点の自動調整方法。 A plurality of optical members which are provided with lenses having different optical characteristics and are supported so as to be independently displaceable in a direction along the optical axis and in a direction crossing the optical axis, and an optical axis position corresponding to the optical axis, An operating member for independently displacing to the retracted position off the optical axis is driven by a single drive means, and the operating member is for displacing the optical member to the optical axis position and the retracted position. A first cam surface and a second cam surface configured to adjust the focus of the optical member at the optical axis position, the second cam surface comprising: a surface intersecting with the support shaft of the operation member; A method for automatically adjusting a focus in a camera module having an inclined portion that is inclined along a circumferential direction in a plane intersecting with a support shaft,
An automatic focus adjustment method, wherein a focus adjustment region is set on a downward slope in the drive direction of the operation member in the inclined portion, and focus adjustment is performed in the focus adjustment region. 前記光学部材を前記傾斜部における上り斜面から下り斜面に移動させた後、一旦、前記光学部材を少なくとも前記下り斜面の前記焦点調整領域の下端まで移動させた後に前記操作部材を逆転させ、前記光学部材が前記下り斜面を上る過程で焦点調整することを特徴とする請求項１に記載の焦点の自動調整方法。   After the optical member is moved from the ascending slope to the descending slope in the inclined portion, the optical member is once moved at least to the lower end of the focus adjustment region of the descending slope, and then the operation member is reversed, and the optical 2. The focus automatic adjustment method according to claim 1, wherein focus adjustment is performed in a process in which a member goes up the down slope. 前記第一カム面と第二カム面は、前記操作部材の両端に形成され、２つの異なる操作モード下において前記第二カム面に設定された焦点調整領域でそれぞれ焦点調整を行うことを特徴とする請求項１又は２に記載の焦点の自動調整方法。
The first cam surface and the second cam surface are formed at both ends of the operation member, respectively, and perform focus adjustment respectively in a focus adjustment region set on the second cam surface under two different operation modes. The method for automatically adjusting a focus according to claim 1 or 2.