JP2020187281A - Optical device - Google Patents
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Abstract
Description
本発明は、カムを利用して光学素子を駆動する光学機器に関する。 The present invention relates to an optical device that drives an optical element using a cam.
従来、光軸と平行な軸周りに回転するカム部材を用いて、夫々カムフォロアを有する複数の光学素子（移動群）を進退させるレンズ鏡筒が知られている。例えば、特許文献１は、凸形状のカム部（リブカム部）を２つのカムフォロアで挟み、両者間に引張力（付勢力）を加えることによってカム部の端面であるカムとカムフォロワを係合させ、二つのカムの径をカム交角に応じて変更する駆動装置を開示している。 Conventionally, a lens barrel has been known in which a plurality of optical elements (moving groups) each having a cam follower are moved forward and backward by using a cam member that rotates around an axis parallel to the optical axis. For example, in Patent Document 1, a convex cam portion (rib cam portion) is sandwiched between two cam followers, and a tensile force (urging force) is applied between the two cam followers to engage a cam and a cam follower, which are end faces of the cam portion. A drive device that changes the diameters of two cams according to the cam intersection angle is disclosed.
しかしながら、特許文献１の構造では、２つの移動群が最も接近する位置において十分な付勢力を確保すると、２つの移動群が最も離れた位置において過剰な付勢力が発生して移動群を駆動する駆動部への負荷が過剰となるおそれがある。この結果、駆動装置ひいては光学機器全体の大型化やコストアップを招くおそれがあり、また、設計上の制約も大きい。 However, in the structure of Patent Document 1, when a sufficient urging force is secured at the position where the two moving groups are closest to each other, an excessive urging force is generated at the position where the two moving groups are closest to each other to drive the moving group. The load on the drive unit may be excessive. As a result, there is a risk of increasing the size and cost of the driving device and thus the entire optical device, and there are also large design restrictions.
そこで、本発明は、高い設計自由度を有してカムを利用して移動群を移動させることが可能な小型の光学機器を提供することを目的とする。 Therefore, an object of the present invention is to provide a small optical device having a high degree of freedom in design and capable of moving a moving group by using a cam.
本発明の光学機器は、それぞれが光学素子とカムフォロアを有し、光軸方向に移動可能な複数の移動群と、前記複数の移動群の移動を案内する複数のカムを有し、前記光軸方向に平行な軸の周りに回転可能なカム部材と、前記複数の移動群のうち第１の移動群の第１のカムフォロアを、前記カム部材の第１の端面に付勢する付勢部材と、前記付勢部材を押える押え部を有する押え部材と、を有し、前記付勢部材は、前記押え部から前記第１のカムフォロアが離れる方向に前記第１のカムフォロアを付勢することを特徴とする。 The optical device of the present invention has an optical element and a cam follower, each of which has a plurality of moving groups that can move in the optical axis direction, and a plurality of cams that guide the movement of the plurality of moving groups. A cam member that can rotate around an axis parallel to the direction, and an urging member that urges the first cam follower of the first moving group among the plurality of moving groups to the first end surface of the cam member. It has a pressing member having a pressing portion for pressing the urging member, and the urging member urges the first cam follower in a direction in which the first cam follower separates from the pressing portion. And.
本発明によれば、高い設計自由度を有してカムを利用して移動群を移動させることが可能な小型の光学機器を提供することができる。 According to the present invention, it is possible to provide a small optical device having a high degree of freedom in design and capable of moving a moving group by using a cam.
特許文献１は、駆動装置の大型化を招くと共に移動群の数が偶数でなければならないという設計上の制約を受ける。仮に、移動群の数を奇数にしようとすると、図９に示す構成が考えられる。図９（ａ）及び（ｂ）は、３つの移動群を駆動する２種類の比較例としての光学機器の概略側面図であり、各図において左側は物体側、右側は像側である。 Patent Document 1 is subject to design restrictions that the drive device becomes large and the number of moving groups must be an even number. Assuming that the number of moving groups is an odd number, the configuration shown in FIG. 9 can be considered. 9 (a) and 9 (b) are schematic side views of optical instruments as two types of comparative examples for driving three moving groups, in which the left side is the object side and the right side is the image side.
図９に示す光学機器は、移動群１００１、１０１１、１０２１を有する。移動群１００１、１０１１、１０２１は、それぞれ、レンズ１００２、１０１２、１０２２を保持する。各移動群は、光軸Ｏに沿って移動可能に構成されている。 The optical instrument shown in FIG. 9 has moving groups 1001, 1011 and 1021. The moving groups 1001, 1011 and 1021 hold the lenses 1002, 1012 and 1022, respectively. Each moving group is configured to be movable along the optical axis O.
即ち、図９（ａ）では、移動群１００１はコロ１００３を有し、移動群１０１１はコロ１０１３、１０１４を有し、移動群１０２１はコロ１０２３を有する。図９（ｂ）では、移動群１００１はコロ１００３、１００４を有し、移動群１０１１はコロ１０１３を有し、移動群１０２１はコロ１０２３を有する。コロ１００３、１０１３、１０２３はカムフォロアとして機能する。 That is, in FIG. 9A, the moving group 1001 has rollers 1003, the moving group 1011 has rollers 1013 and 1014, and the moving group 1021 has rollers 1023. In FIG. 9B, the moving group 1001 has rollers 1003 and 1004, the moving group 1011 has rollers 1013, and the moving group 1021 has rollers 1023. The rollers 1003, 1013, and 1023 function as cam followers.
また、光学機器は、不図示の筐体部材（固定部）と不図示のベアリングを介して光軸Ｏと平行なＸ軸の周りに回転可能に保持されたカム筒１０４０、１０４５を更に有する。図９（ａ）に示すカム筒１０４０は、基部１０４１と、基部１０４１の外周に一体に設けられた第１のカム部１０４２と、第１のカム部１０４２から突出した凸形状の第２のカム部１０４３と、を有する。図９（ｂ）に示すカム筒１０４５は、基部１０４６と、基部１０４６の外周に一体に設けられた第１のカム部１０４７と、第１のカム部１０４７から突出した凸形状の第２のカム部１０４８と第３のカム部１０４９と、を有する。基部１０４１、１０４６の両側端面が不図示のベアリングを介して不図示の筐体部材に回転可能に保持される。 Further, the optical instrument further includes cam cylinders 1040 and 1045 rotatably held around an X axis parallel to the optical axis O via a housing member (fixed portion) (not shown) and a bearing (not shown). The cam cylinder 1040 shown in FIG. 9A has a base portion 1041, a first cam portion 1042 integrally provided on the outer periphery of the base portion 1041, and a convex second cam protruding from the first cam portion 1042. It has a part 1043 and. The cam cylinder 1045 shown in FIG. 9B has a base portion 1046, a first cam portion 1047 integrally provided on the outer periphery of the base portion 1046, and a convex second cam protruding from the first cam portion 1047. It has a portion 1048 and a third cam portion 1049. Both end faces of the bases 1041 and 1046 are rotatably held by a housing member (not shown) via bearings (not shown).
図９（ａ）では、移動群１００１と１０２１の間に引張バネ１０３１が接続されている。コロ１００３は基部１０４１上で第１のカム部１０４２の端面１０４２ａに付勢され、コロ１０２３は基部１０４１上で第１カム１０４２の端面１０４２ｂに付勢される。また、コロ１０１３と１０１４の間には引張バネ１０３２が設けられ、コロ１０１３は第１カム部１０４２上で第２のカム部１０４３の端面１０４３ａに付勢され、コロ１０１４は第１カム部１０４２上で第２のカム部１０４３の端面１０４３ｂに付勢される。端面１０４２ａ、１０４２ｂ及び１０４３ａはカムとして機能する。端面１０４３ｂは引張バネ１０３２を押える押え面として機能する。 In FIG. 9A, the tension spring 1031 is connected between the moving groups 1001 and 1021. The roller 1003 is urged on the base 1041 to the end face 1042a of the first cam portion 1042, and the roller 1023 is urged on the base 1041 to the end face 1042b of the first cam 1042. Further, a tension spring 1032 is provided between the rollers 1013 and 1014, the rollers 1013 are urged on the end surface 1043a of the second cam portion 1043 on the first cam portion 1042, and the rollers 1014 are on the first cam portion 1042. Is urged to the end face 1043b of the second cam portion 1043. The end faces 1042a, 1042b and 1043a function as cams. The end face 1043b functions as a holding surface for holding the tension spring 1032.
図９（ｂ）では、コロ１００３と１００４との間には引張バネ１０３３が設けられる。コロ１００３は第１カム部１０４７上で第２のカム部１０４８の端面１０４８ａに付勢され、コロ１００４は第１のカム部１０４７上で第２のカム部１０４８の端面１０４８ｂに付勢される。また、移動群１０１１と１０２１の間には引張バネ１０３４が設けられ、コロ１０１３は第１のカム部１０４７上で第３のカム部１０４９の端面１０４９ａに付勢され、コロ１０２３は基部１０４５上で第１のカム部１０４７の端面１０４７ａに付勢される。端面１０４７ａ、１０４８ａ及び１０４９ａはカムとして機能する。端面１０４８ｂは引張バネ１０３３を押える押え面として機能する。 In FIG. 9B, a tension spring 1033 is provided between the rollers 1003 and 1004. The roller 1003 is urged on the first cam portion 1047 to the end surface 1048a of the second cam portion 1048, and the roller 1004 is urged on the first cam portion 1047 to the end surface 1048b of the second cam portion 1048. Further, a tension spring 1034 is provided between the moving groups 1011 and 1021, the roller 1013 is urged on the end face 1049a of the third cam portion 1049 on the first cam portion 1047, and the roller 1023 is on the base 1045. It is urged to the end surface 1047a of the first cam portion 1047. The end faces 1047a, 1048a and 1049a function as cams. The end face 1048b functions as a holding surface for holding the tension spring 1033.
移動群１００１、１０１１、１０２１の中で移動群１００１のカム軌跡がリニアで最もストロークが長く、移動群１００１を不図示の駆動手段により駆動する場合、図９（ａ）に示す構成では、移動群１００１と１０２１との距離の変動が大きくなる。即ち、２つの移動群１００１、１０２１が最も接近する位置において十分な引張バネ１０３１の付勢力を確保しようとすると、２つの移動群１００１、１０２１が最も離れた位置においては過剰な引張バネ１０３１の付勢力が発生する。この結果、特許文献１と同様に、移動群１００１を駆動する不図示の駆動手段への負荷が過剰となるおそれがあり、駆動装置ひいては光学機器全体の大型化やコストアップを招くおそれがある。図９（ｂ）に示す構成では、移動群１００１はコロ１００４を利用して他の移動群とは接続されずに第２のカム部１０４８に付勢されるため、第１カム１０４７の物体側の端面をカム面として利用することができないという設計上の制約が存在する。 Among the moving groups 1001, 1011 and 1021, when the cam locus of the moving group 1001 is linear and has the longest stroke and the moving group 1001 is driven by a driving means (not shown), the moving group has the configuration shown in FIG. 9A. The variation in the distance between 1001 and 1021 becomes large. That is, when trying to secure a sufficient urging force of the tension spring 1031 at the position where the two moving groups 1001 and 1021 are closest to each other, an excessive tension spring 1031 is attached at the position where the two moving groups 1001 and 1021 are closest to each other. Power is generated. As a result, as in Patent Document 1, there is a possibility that the load on the driving means (not shown) for driving the moving group 1001 becomes excessive, which may lead to an increase in size and cost of the driving device and thus the entire optical device. In the configuration shown in FIG. 9B, since the moving group 1001 is urged by the second cam portion 1048 without being connected to the other moving groups by using the roller 1004, the object side of the first cam 1047 There is a design restriction that the end face of the can not be used as a cam face.
以下に、本発明の好ましい実施の形態を、添付の図面に基づいて詳細に説明する。 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
本実施形態の光学機器は、変倍時に光軸と平行な軸の周りに回転するカム部材によって複数の移動群（移動部、移動ユニット）を光軸方向に移動させる撮像装置である。但し、本発明はこれに限定されず、撮像装置に着脱可能な交換レンズ装置等のレンズ装置や他の光学機器にも適用可能である。なお、以下の説明において、カム部材は一以上のカム部を有する。カム部は、カムフォロアの移動を案内する一以上のカムを備えた部材である。以下の実施例では、カムは、カム部の端面に形成されるが、溝状に（凹部として）形成されることを妨げるものではない。 The optical device of this embodiment is an imaging device that moves a plurality of moving groups (moving parts, moving units) in the optical axis direction by a cam member that rotates around an axis parallel to the optical axis at the time of scaling. However, the present invention is not limited to this, and can be applied to a lens device such as an interchangeable lens device that can be attached to and detached from an image pickup device and other optical devices. In the following description, the cam member has one or more cam portions. The cam portion is a member including one or more cams that guide the movement of the cam follower. In the following examples, the cam is formed on the end face of the cam portion, but does not prevent it from being formed in a groove shape (as a recess).
図４は、本発明の実施例１に係るレンズ鏡筒（光学機器）の概略側面図であり、左側は物体側、右側は像側である。レンズ鏡筒は、複数の（ここでは、４つの）移動群２００１、２０１１、２０２１、２０３１を有し、それぞれ、レンズ（光学素子）２００２、２０１２、２０２２、２０３２を保持し、光軸Ｏに沿って移動可能に構成される。なお、移動群の数は限定されない。図４に示す例では、最も物体側（最も左側）の移動群２００１は、駆動部（駆動手段）としてのリニアアクチュエータ２００９によって光軸方向に駆動されるが、本発明はこれに限定されない。最も像側の移動群２０３１や他の移動群が駆動されてもよいし、後述するカム筒や蓋部材が駆動部（駆動手段）によって回転駆動されてもよい。図４では、移動群２００１が駆動され、その駆動力でカム筒が回転し、この結果、カム筒に係合している他の移動群が光軸方向に駆動される。 FIG. 4 is a schematic side view of the lens barrel (optical device) according to the first embodiment of the present invention, with the left side being the object side and the right side being the image side. The lens barrel has a plurality of (here, four) moving groups 2001, 2011, 2021, and 2031, holding lenses (optical elements) 2002, 2012, 2022, and 2032, respectively, along the optical axis O. It is configured to be movable. The number of moving groups is not limited. In the example shown in FIG. 4, the moving group 2001 on the most object side (leftmost side) is driven in the optical axis direction by a linear actuator 2009 as a driving unit (driving means), but the present invention is not limited thereto. The moving group 2031 on the most image side or another moving group may be driven, or the cam cylinder or lid member described later may be rotationally driven by a driving unit (driving means). In FIG. 4, the moving group 2001 is driven, and the driving force rotates the cam cylinder, and as a result, the other moving group engaged with the cam cylinder is driven in the optical axis direction.
移動群（第１の移動群）２００１は、コロ２００３、２００４を有し、移動群２０１１は、コロ２０１３、２０１４を有し、移動群２０２１は、コロ２０２３を有し、移動群２０３１は、コロ２０３３を有する。コロ２００３、２０１３、２０２３、２０３３はカムフォロアとして機能する。コロ（第１のカムフォロア）２００３は付勢部材２００５の一端に係合し、付勢部材２００５によりカム筒２０５０の端面２０５１ａに付勢（押圧、接触）される。コロ２００４は付勢部材２００５の他端に係合し、押え部である蓋部材２０６０の端面（第２の端面）２０６２ａに接触する。なお、押え部とは対象物（ここでは付勢部材）が（ある方向に）動かないように力（ここでは付勢部材の反力）を加える部材をいう。このように、コロ２００３と２００４の間には付勢部材２００５が設けられ、コロ２０１３と２０１４の間には引張バネ２０１５が設けられ、移動群２０２１と２０３１の間には引張バネ２０２５が設けられている。 The moving group (first moving group) 2001 has rollers 2003 and 2004, the moving group 2011 has rollers 2013 and 2014, the moving group 2021 has rollers 2023, and the moving group 2031 has rollers 2031. It has 2033. The rollers 2003, 2013, 2023, and 2033 function as cam followers. The roller (first cam follower) 2003 engages with one end of the urging member 2005, and is urged (pressed, contacted) with the end surface 2051a of the cam cylinder 2050 by the urging member 2005. The roller 2004 engages with the other end of the urging member 2005 and comes into contact with the end face (second end face) 2062a of the lid member 2060 which is a holding portion. The pressing portion refers to a member that applies a force (here, a reaction force of the urging member) so that the object (here, the urging member) does not move (in a certain direction). As described above, the urging member 2005 is provided between the rollers 2003 and 2004, the tension spring 2015 is provided between the rollers 2013 and 2014, and the tension spring 2025 is provided between the moving groups 2021 and 2031. ing.
レンズ鏡筒は、固定部である筐体部材２０４１、２０４３を有する。筐体部材２０４１の保持部２０４２と、筐体部材２０４３の保持部２０４４の間には、不図示のベアリングを介して光軸Ｏと平行なＸ軸の周りに回転可能に保持されたカム筒（カム部材）２０５０と蓋部材（押え部材）２０６０が設けられている。 The lens barrel has housing members 2041 and 2043 which are fixed portions. A cam cylinder rotatably held around the X-axis parallel to the optical axis O via a bearing (not shown) between the holding portion 2042 of the housing member 2041 and the holding portion 2044 of the housing member 2043. A cam member) 2050 and a lid member (pressing member) 2060 are provided.
カム筒２０５０と蓋部材２０６０の回転軸はＸ軸と同軸であり、両者はＸ軸周りに一体に回転するように構成されている。カム筒２０５０と蓋部材２０６０の接続は、凹凸係合、継手、接着等を利用した機械的接続、磁気的接続など限定されない。図４では、移動群２００１がリニアアクチュエータ２００９によって駆動され、蓋部材２０６０がＸ軸方向におけるカム筒２０５０の物体側に設けられている。但し、移動群２０３１が駆動手段によって駆動され、蓋部材２０６０がカム筒２０５０のＸ軸方向における像側に設けられていてもよい。 The rotation axes of the cam cylinder 2050 and the lid member 2060 are coaxial with the X axis, and both are configured to rotate integrally around the X axis. The connection between the cam cylinder 2050 and the lid member 2060 is not limited to mechanical connection using uneven engagement, joints, adhesion, and magnetic connection. In FIG. 4, the moving group 2001 is driven by a linear actuator 2009, and the lid member 2060 is provided on the object side of the cam cylinder 2050 in the X-axis direction. However, the moving group 2031 may be driven by the driving means, and the lid member 2060 may be provided on the image side of the cam cylinder 2050 in the X-axis direction.
カム筒２０５０は、円筒形状の不図示の基部、基部の外周に一体に設けられた第１のカム部２０５１、第１のカム部２０５１からそれぞれ突出した凸形状の第２のカム部（リブカム部）２０５２と第３のカム部（リブカム部）２０５３を有する。このように、カム筒２０５０は複数のカム部を有し、各カム部は一以上のカムとして機能する端面を有する。基部の像側端面は、不図示のベアリングを介して保持部２０４４によって回転可能に支持され、基部の物体側端部は蓋部材２０６０の像側端部と接続している。 The cam cylinder 2050 has a cylindrical base portion (not shown), a first cam portion 2051 integrally provided on the outer periphery of the base portion, and a convex second cam portion (rib cam portion) protruding from the first cam portion 2051. ) 2052 and a third cam portion (rib cam portion) 2053. As described above, the cam cylinder 2050 has a plurality of cam portions, and each cam portion has an end face that functions as one or more cams. The image-side end face of the base is rotatably supported by a holding portion 2044 via a bearing (not shown), and the object-side end of the base is connected to the image-side end of the lid member 2060.
蓋部材２０６０は、カム筒２０５０とは異なる部材として設けられ（別個の部材として製造され）、カム筒２０５０と係合している。蓋部材２０６０は、図４では２つの円筒を重ねた形状を有しているが、本発明はこの形状に限定されない。蓋部材２０６０は、接続部２０６１と保持部２０６２を有する。接続部２０６１は像側端部でカム筒２０５０と接続する。保持部２０６２は、接続部２０６１から外側に張り出しており、この張り出し部でコロ２００４と接触する。接続部２０６１は、カム筒２０５０に設けられ、接続部２０６１と保持部２０６２が接続してもよい。保持部２０６２の物体側の端面は、不図示のベアリングを介して筐体部材２０４１の一部である保持部２０４２によって回転可能に支持されている。 The lid member 2060 is provided as a member different from the cam cylinder 2050 (manufactured as a separate member) and engages with the cam cylinder 2050. The lid member 2060 has a shape in which two cylinders are overlapped in FIG. 4, but the present invention is not limited to this shape. The lid member 2060 has a connecting portion 2061 and a holding portion 2062. The connection portion 2061 is connected to the cam cylinder 2050 at the end on the image side. The holding portion 2062 projects outward from the connecting portion 2061, and the holding portion 2062 comes into contact with the roller 2004 at this projecting portion. The connecting portion 2061 may be provided on the cam cylinder 2050, and the connecting portion 2061 and the holding portion 2062 may be connected to each other. The object-side end face of the holding portion 2062 is rotatably supported by the holding portion 2042, which is a part of the housing member 2041, via a bearing (not shown).
付勢部材２００５は、カム筒２０５０の最も物体側に位置し、カムとして機能するカム筒２０５０の端面（第１の端面）２０５１ａと、これに対向する蓋部材２０６０の端面（第２の端面）２０６２ａの間に設けられる。なお、以下の説明において、「対向」とは、第１の端面と第２の端面が向かい合っていることを意味し、リブカム部の両側の端面などお互いが向き合っていないもの（見えないもの）は含まない。また、第１の端面と第２の端面が平行であることを要求しない。より詳細には、付勢部材２００５は、端面２０５１ａと２０６２ａを含む凹部に設けられる。付勢部材２００５は、カム筒２０５０の複数のカムのうち蓋部材２０６０に最も近いカムとして機能する端面２０５１ａに付勢する。ここで、付勢部材２００５は、端面２０６２ａからコロ２００３が離れる方向にコロ２００３を付勢する。付勢部材２００５は、（引張力ではなく）圧縮力をコロ２００３に加え、圧縮バネやゴム等から構成される。蓋部材２０６０の端面２０６２ａは付勢部材２００５を押える機能を有する。端面２０６２ａは、端面２０５１ａの物体側にある。 The urging member 2005 is located on the most object side of the cam cylinder 2050, and has an end face (first end face) 2051a of the cam cylinder 2050 that functions as a cam and an end face (second end face) of the lid member 2060 that faces the end face (first end face) 2051a. It is provided between 2062a. In the following description, "opposing" means that the first end face and the second end face face each other, and the end faces on both sides of the rib cam portion that do not face each other (invisible) Not included. Also, it does not require that the first end face and the second end face be parallel. More specifically, the urging member 2005 is provided in a recess including the end faces 2051a and 2062a. The urging member 2005 urges the end face 2051a which functions as the cam closest to the lid member 2060 among the plurality of cams of the cam cylinder 2050. Here, the urging member 2005 urges the rollers 2003 in the direction in which the rollers 2003 are separated from the end surface 2062a. The urging member 2005 is composed of a compression spring, rubber, etc. by applying a compressive force (not a tensile force) to the roller 2003. The end face 2062a of the lid member 2060 has a function of pressing the urging member 2005. The end face 2062a is on the object side of the end face 2051a.
付勢部材２００５により、コロ２００３は接続部２０６１上で第１のカム部２０５１の端面２０５１ａに付勢され、コロ２００４は接続部２０６１上で保持部２０６２の端面２０６２ａに付勢される。引張バネ２０１５により、コロ２０１３は第１のカム部２０５１上で第２のカム部２０５２の端面２０５２ａに付勢され、コロ２０１４は第１のカム部２０５１上で第２のカム部２０５２の端面２０５２ｂに付勢される。引張バネ２０２５により、コロ２０２３は第１のカム部２０５１上で第３のカム部２０５３の端面２０５３ａに付勢され、コロ２０３３は保持部２０４４上で第１のカム部２０５１の端面２０５１ｂに付勢される。 The urging member 2005 urges the roller 2003 on the connecting portion 2061 to the end surface 2051a of the first cam portion 2051, and the roller 2004 is urged on the connecting portion 2061 to the end surface 2062a of the holding portion 2062. The tension spring 2015 urges the roller 2013 on the first cam portion 2051 to the end face 2052a of the second cam portion 2052, and the roller 2014 is urged on the first cam portion 2051 to the end face 2052b of the second cam portion 2052. Be urged to. The tension spring 2025 urges the roller 2023 on the first cam portion 2051 to the end face 2053a of the third cam portion 2053, and the roller 2033 to urge the end face 2051b of the first cam portion 2051 on the holding portion 2044. Will be done.
移動群２００１は、カム軌跡がリニアで最もストロークが長く、リニアアクチュエータ２００９によって光軸方向に移動される。そして、その駆動力でカム筒２０５０及び蓋部材２０６０を回転させ、他の移動群を移動させる。ここで、カム筒２０５０及び蓋部材２０６０は成型部品である。端面２０６２ａには高い加工精度を要さず、蓋部材２０６０はカム筒２０５０のような精密加工部品ではないため、比較的低コストで製造が可能である。また、端面２０５１ａのＸ軸となす角度であるカム交角（径）を小さくすることができるので、駆動手段であるリニアアクチュエータ２００９の負荷を小さく抑えることができ、駆動部やレンズ鏡筒の小型化を達成することができる。更に、移動群の数は限定されず、付勢部材２００５は、複数の移動群のうち第１の移動群以外の移動群には接続されていない。即ち、移動群２００１を他の移動群と接続しなくてもコロ２００３をカム筒２０５０の端面２０５１ａに係合させることができるので、設計の自由度も高い。 The moving group 2001 has a linear cam locus and the longest stroke, and is moved in the optical axis direction by the linear actuator 2009. Then, the cam cylinder 2050 and the lid member 2060 are rotated by the driving force to move other moving groups. Here, the cam cylinder 2050 and the lid member 2060 are molded parts. Since the end face 2062a does not require high processing accuracy and the lid member 2060 is not a precision processed part such as the cam cylinder 2050, it can be manufactured at a relatively low cost. Further, since the cam intersection angle (diameter), which is the angle formed by the end face 2051a with the X axis, can be reduced, the load of the linear actuator 2009, which is a driving means, can be suppressed to a small size, and the driving unit and the lens barrel can be miniaturized. Can be achieved. Further, the number of moving groups is not limited, and the urging member 2005 is not connected to any moving group other than the first moving group among the plurality of moving groups. That is, since the roller 2003 can be engaged with the end face 2051a of the cam cylinder 2050 without connecting the moving group 2001 to another moving group, the degree of freedom in design is high.
以下、図１乃至図４を参照して、実施例１に係るレンズ鏡筒（光学機器）の具体的な構成について説明する。図１（ａ）及び（ｂ）は、それぞれ、レンズ鏡筒のＷＩＤＥ位置（広角端位置）とＴＥＬＥ位置（望遠端位置）における要部側面図である。カム筒９１と蓋部材９２の回転に伴い、図１（ａ）の状態から図１（ｂ）の状態まで変倍動作が行われる。図２は、実施例１に係るレンズ鏡筒の要部斜視図である。 Hereinafter, a specific configuration of the lens barrel (optical device) according to the first embodiment will be described with reference to FIGS. 1 to 4. 1 (a) and 1 (b) are side views of a main part of the lens barrel at the WIDE position (wide-angle end position) and the TELE position (telephoto end position), respectively. As the cam cylinder 91 and the lid member 92 rotate, the scaling operation is performed from the state shown in FIG. 1A to the state shown in FIG. 1B. FIG. 2 is a perspective view of a main part of the lens barrel according to the first embodiment.
レンズ鏡筒の光学系は、光路（光軸Ｏ）に沿って物体側（左側）から像側（右側）に向かって順に、第１レンズ１、第２レンズ２、第３レンズ３、不図示のフォーカスレンズ群等の光学素子を有する。撮像素子４は、光学系が形成した被写体の光学像を光電変換し、ＣＣＤセンサやＣＭＯＳセンサ等の光電変換素子を含む。 The optical system of the lens barrel is the first lens 1, the second lens 2, the third lens 3, and not shown in order from the object side (left side) to the image side (right side) along the optical path (optical axis O). It has an optical element such as a focus lens group of. The image sensor 4 photoelectrically converts an optical image of a subject formed by an optical system, and includes a photoelectric conversion element such as a CCD sensor or a CMOS sensor.
第１レンズ１は、１群レンズ枠（移動群）１０に保持され、撮像素子４は４群移動枠（移動群）４０に保持されている。１群レンズ枠１０及び４群移動枠４０は１４群案内部材８１によって光軸方向に移動可能に案内支持される。第２レンズ２は２群レンズ枠（移動群）２０に保持され、第３レンズ３は３群レンズ枠（移動群）３０に保持されている。２群レンズ枠２０及び３群レンズ枠３０は２３群案内部材８２によって光軸方向に移動可能に案内支持される。１群レンズ枠１０、２群レンズ枠２０、３群レンズ枠３０、４群移動枠４０は回転止め支持部材８３とも係合し、第１レンズ１、第２レンズ２、第３レンズ３、撮像素子４の中心が光軸Ｏ上に位置するように支持されている。 The first lens 1 is held by the 1st group lens frame (moving group) 10, and the image sensor 4 is held by the 4th group moving frame (moving group) 40. The 1st group lens frame 10 and the 4th group moving frame 40 are guided and supported by the 14th group guiding member 81 so as to be movable in the optical axis direction. The second lens 2 is held by the second group lens frame (moving group) 20, and the third lens 3 is held by the third group lens frame (moving group) 30. The group 2 lens frame 20 and the group 3 lens frame 30 are guided and supported by the group 23 guide member 82 so as to be movable in the optical axis direction. The 1st group lens frame 10, the 2nd group lens frame 20, the 3rd group lens frame 30, and the 4th group moving frame 40 also engage with the rotation stop support member 83, and the first lens 1, the second lens 2, the third lens 3, and the image pickup are performed. The center of the element 4 is supported so as to be located on the optical axis O.
１群レンズ枠１０はラック部材１０１を保持し、ラック部材１０１はラック付勢部材１０２によって駆動部（駆動手段）５と係合している。駆動部５は、駆動部移動群５１と駆動部固定群５２を有し、駆動部移動群５１が駆動部固定群５２に対して一次線形的に相対移動するリニアアクチュエータの構成となっている。１群レンズ枠１０はラック部材１０１を介して駆動部５から受けた駆動力によって光軸方向に進退する。 The group 1 lens frame 10 holds the rack member 101, and the rack member 101 is engaged with the drive unit (driving means) 5 by the rack urging member 102. The drive unit 5 has a drive unit moving group 51 and a drive unit fixed group 52, and is configured as a linear actuator in which the drive unit moving group 51 moves linearly relative to the drive unit fixed group 52. The group 1 lens frame 10 moves back and forth in the optical axis direction by the driving force received from the driving unit 5 via the rack member 101.
カム筒（カム部材）９１と蓋部材（押え部材）９２は、前側筺体部材６の前側カム保持部６ａと後側筺体部材７０の後側カム保持部７０ａによって回転軸としてのＸ軸の周りに回転可能に保持されている。蓋部材９２は圧縮バネを押える機能を有する。 The cam cylinder (cam member) 91 and the lid member (pressing member) 92 are formed around the X-axis as a rotation axis by the front cam holding portion 6a of the front housing member 6 and the rear cam holding portion 70a of the rear housing member 70. It is held rotatably. The lid member 92 has a function of pressing the compression spring.
１群レンズ枠１０は１群カムフォロワ１１０を保持し、１群カムフォロワ１１０はカム筒９１と蓋部材９２と係合している。駆動部５の駆動力によって１群レンズ枠１０が光軸方向に進退するのに伴い、カム筒９１及び蓋部材９２はＸ軸の周りに回転する。２群レンズ枠２０、３群レンズ枠３０、４群移動枠４０はカム筒９１に係合し、カム筒９１の回転に伴い、各々のカム軌跡に基づきそれぞれが光軸方向に移動する。 The group 1 lens frame 10 holds the group 1 cam follower 110, and the group 1 cam follower 110 is engaged with the cam cylinder 91 and the lid member 92. The cam cylinder 91 and the lid member 92 rotate around the X-axis as the group 1 lens frame 10 moves back and forth in the optical axis direction due to the driving force of the drive unit 5. The second group lens frame 20, the third group lens frame 30, and the fourth group moving frame 40 engage with the cam cylinder 91, and as the cam cylinder 91 rotates, each moves in the optical axis direction based on each cam locus.
１群レンズ枠１０の１群カムフォロワ１１０は、二つの１群コロ部材１１１と伸縮可能な１群スライダ部材１１２と不図示の圧縮バネ（付勢手段）を有する。二つの１群コロ部材１１１は、１群スライダ部材１１２の長手方向に案内支持されると共に、お互いが離間する向きに圧縮バネによって付勢されている。 The group 1 cam follower 110 of the group 1 lens frame 10 has two group 1 roller members 111, a stretchable group 1 slider member 112, and a compression spring (a urging means) (not shown). The two group 1 roller members 111 are guided and supported in the longitudinal direction of the group 1 slider member 112, and are urged by a compression spring in a direction in which they are separated from each other.
図３は、カム筒９１と蓋部材９２の斜視図である。カム筒９１は、円筒形状の基部９１Ａ、基部９１Ａの外周に一体に設けられた第１のカム部９１Ｂ、第１のカム部９１Ｂからそれぞれ突出した凸形状の第２のカム部（リブカム部）９１Ｃと第３のカム部（リブカム部）９１Ｄを有する。基部９１Ａの像側の端面９１ｆは、ベアリング７０ｂを介して後側カム保持部７０ａによって回転可能に支持され、基部９１Ａの物体側端部は蓋部材９２の像側端部と接続している。 FIG. 3 is a perspective view of the cam cylinder 91 and the lid member 92. The cam cylinder 91 has a cylindrical base 91A, a convex second cam portion (rib cam portion) protruding from the first cam portion 91B and the first cam portion 91B integrally provided on the outer periphery of the base 91A. It has a 91C and a third cam portion (rib cam portion) 91D. The image-side end surface 91f of the base 91A is rotatably supported by the rear cam holding portion 70a via a bearing 70b, and the object-side end of the base 91A is connected to the image-side end of the lid member 92.
蓋部材９２は、カム筒９１とは異なる部材として設けられ（別個の部材として製造され）、カム筒９１の基部９１Ａの物体側の端部と一体的に接続している。蓋部材９２の物体側の端面９２ｂは、ベアリング６ｂを介して回転可能に支持されている。 The lid member 92 is provided as a member different from the cam cylinder 91 (manufactured as a separate member), and is integrally connected to the object-side end of the base 91A of the cam cylinder 91. The end face 92b on the object side of the lid member 92 is rotatably supported via a bearing 6b.
カム筒９１には、カム筒９１の最も物体側に位置し、カムとして機能する１群カム面（第１の端面）９１ａが設けられ、蓋部材９２には、１群カム面９１ａに対向する１群カム押え面（押え部、第２の端面）９２ａが設けられている。１群カム押え面９２ａは、１群カム面９１ａの物体側にある。 The cam cylinder 91 is provided with a group 1 cam surface (first end surface) 91a located on the most object side of the cam cylinder 91 and functioning as a cam, and the lid member 92 faces the group 1 cam surface 91a. A group 1 cam holding surface (holding portion, second end face) 92a is provided. The group 1 cam holding surface 92a is on the object side of the group 1 cam surface 91a.
１群カム押え面９２ａは１群カム面９１ａとの距離が略一定となるような形状を有し、その間に二つの１群コロ部材１１１が圧縮された状態で設けられることにより、１群レンズ枠１０とカム筒９１と蓋部材９２が係合している。１群カム面９１ａに押圧される１群コロ部材１１１が第１のカムフォロアである。圧縮バネは、１群カム面９１ａ側の１群コロ部材１１１（第１のカムフォロア）を１群カム面９１ａに付勢する。また、圧縮バネは、１群カム面９１ａ側の１群コロ部材１１１が１群カム押え面９２ａから離れる方向に１群カム面９１ａ側の１群コロ部材１１１を付勢する。 The group 1 cam pressing surface 92a has a shape so that the distance from the group 1 cam surface 91a is substantially constant, and the two group 1 roller members 111 are provided in a compressed state between them, so that the group 1 lens The frame 10, the cam cylinder 91, and the lid member 92 are engaged with each other. The group 1 roller member 111 pressed against the group 1 cam surface 91a is the first cam follower. The compression spring urges the group 1 roller member 111 (first cam follower) on the group 1 cam surface 91a side to the group 1 cam surface 91a. Further, the compression spring urges the 1st group roller member 111 on the 1st group cam surface 91a side in the direction in which the 1st group roller member 111 on the 1st group cam surface 91a side is separated from the 1st group cam pressing surface 92a.
１群カム押え面９２ａと１群カム面９１ａとの距離の変動は、二つの１群コロ部材１１１間に働く圧縮バネの付勢力の変動が許容できる限り（あるいは駆動部５にとって許容できる限り）許容できる。図３において、１群カム押え面９１ａと９２ａの間の部分はカム筒９１の基部９１Ａである。１群カム面９１ａ、基部９１Ａの表面、１群カム押え面９２ａは凹部を形成し、この凹部に１群カムフォロワ１１０が配置される。 The fluctuation of the distance between the 1st group cam pressing surface 92a and the 1st group cam surface 91a is as long as the fluctuation of the urging force of the compression spring acting between the two 1st group roller members 111 is acceptable (or as long as it is acceptable for the drive unit 5). acceptable. In FIG. 3, the portion between the group 1 cam holding surfaces 91a and 92a is the base 91A of the cam cylinder 91. The surface of the group 1 cam surface 91a and the base 91A, the surface of the group 1 cam holding surface 92a form a recess, and the group 1 cam follower 110 is arranged in the recess.
第２のカム部９１Ｃの両側には、カムとして機能する２群カム面９１ｂと３群カム面９１ｃが設けられている。２群カム面９１ｂには２群レンズ枠２０に保持された２群コロ部材２１１が係合し、３群カム面９１ｃには３群レンズ枠３０に保持された３群コロ部材３１１が係合している。 On both sides of the second cam portion 91C, a second group cam surface 91b and a third group cam surface 91c that function as cams are provided. The second group roller member 211 held by the second group lens frame 20 is engaged with the second group cam surface 91b, and the third group roller member 311 held by the third group lens frame 30 is engaged with the third group cam surface 91c. doing.
２群レンズ枠２０には２群ばね係合部２０１が設けられ、３群レンズ枠３０には３群ばね係合部３０１が設けられ、２群ばね係合部２０１と３群ばね係合部３０１には３４群付勢部材１１が係合している。３４群付勢部材１１は引張バネであり、２群レンズ枠２０と３群レンズ枠３０を光軸方向に関して接近させる向きに付勢する。その付勢力により、２群カム面９１ｂと３群カム面９１ｃを含む第１のカム部９１Ｃを２群コロ部材２１１と３群コロ部材３１１がＸ軸方向の前後から挟むように係合する。これにより、２群レンズ枠２０及び３群レンズ枠３０とカム筒９１との係合がなされる。 The second group lens frame 20 is provided with the second group spring engaging portion 201, the third group lens frame 30 is provided with the third group spring engaging portion 301, and the second group spring engaging portion 201 and the third group spring engaging portion are provided. The 34 group urging member 11 is engaged with the 301. The 34-group urging member 11 is a tension spring and urges the 2nd group lens frame 20 and the 3rd group lens frame 30 in a direction in which they approach each other in the optical axis direction. Due to the urging force, the first cam portion 91C including the second group cam surface 91b and the third group cam surface 91c is engaged so as to sandwich the second group roller member 211 and the third group roller member 311 from the front and rear in the X-axis direction. As a result, the second group lens frame 20 and the third group lens frame 30 are engaged with the cam cylinder 91.
４群移動枠４０の４群カムフォロワ４１０は、二つの４群コロ部材４１１、伸縮性のある４群スライダ部材４１２及び不図示の引張バネを有する。二つの４群コロ部材４１１が４群スライダ部材４１２の長手方向に案内支持されるとともに、お互いが接近する向きに引張バネにより付勢される。第３のカム部９１Ｄには、４群カム面９１ｄ及び４群カム押え面９１ｅが設けられており、それぞれが４群コロ部材４１１一つずつと係合している。４群カム押え面９１ｅは４群カム面９１ｄとの距離が略一定となるような形状となっており、その二つの面を含む凸形状を二つの４群コロ部材４１１が光軸方向前後に挟むように引っ張り付勢することで４群移動枠４０とカム筒９１が係合している。 The 4th group cam follower 410 of the 4th group moving frame 40 has two 4th group roller members 411, an elastic 4th group slider member 412, and a tension spring (not shown). The two 4-group roller members 411 are guided and supported in the longitudinal direction of the 4-group slider member 412, and are urged by a tension spring in a direction in which they approach each other. The third cam portion 91D is provided with a fourth group cam surface 91d and a fourth group cam holding surface 91e, each of which is engaged with one fourth group roller member 411. The 4th group cam holding surface 91e has a shape such that the distance from the 4th group cam surface 91d is substantially constant, and the two 4th group roller members 411 form a convex shape including the two surfaces in the front-rear direction in the optical axis direction. The 4th group moving frame 40 and the cam cylinder 91 are engaged with each other by pulling and urging them so as to sandwich them.
カム筒９１及び蓋部材９２は、樹脂材料を射出成型することによって作成される。１群カム押え面９２ａは１群カムフォロワ１１０の付勢の押え部であるため、１群カム面９１ａのような高い加工精度を要しない。このため、蓋部材９２はカム筒９１のような精密加工部品ではないため比較的低コストであり、カム筒９１と蓋部材９２を一つの部品で構成した場合よりもコストを抑えることができる。カム筒９１と蓋部材９２を一つの部品で構成しようする場合、型にカム形状を形成するための複数の外スライド駒を要するため、この部品は非常に高価になる。一方、カム筒９１及び蓋部材９２は、前後抜き構成の単純な駒構成で成型可能な形状であるため、型（モールド）を低コストで作成することができる。 The cam cylinder 91 and the lid member 92 are made by injection molding a resin material. Since the group 1 cam pressing surface 92a is an urging pressing portion of the group 1 cam follower 110, it does not require high processing accuracy as in the group 1 cam surface 91a. Therefore, since the lid member 92 is not a precision machined part like the cam cylinder 91, the cost is relatively low, and the cost can be suppressed as compared with the case where the cam cylinder 91 and the lid member 92 are composed of one part. When the cam cylinder 91 and the lid member 92 are to be composed of one component, this component is very expensive because a plurality of outer slide pieces for forming the cam shape in the mold are required. On the other hand, since the cam cylinder 91 and the lid member 92 have a shape that can be molded with a simple piece structure having a front and rear punching structure, a mold can be produced at low cost.
レンズ鏡筒は、駆動部５によって１群レンズ枠１０を光軸方向に移動させ、１群レンズ枠１０の１群コロ部材１１１を介してカム筒９１と蓋部材９２を回転させ、カム筒９１に係合する他の移動群を光軸方向に移動させる。この構成を用いた場合、駆動部５の負荷を小さく抑えるために、１群レンズ枠１０と係合する１群カム面９１ａのカム交角（径）は小さい方がよい。実施例１の構成を用いれば、カム筒９１に設けられた他のカム面と比べて、１群カム面９１ａの径を小さくすることができるため、駆動部５の負荷を減らすことができ、大型の駆動部を用いる必要がないため、レンズ鏡筒を小型にすることができる。 In the lens barrel, the drive unit 5 moves the group 1 lens frame 10 in the optical axis direction, and the cam cylinder 91 and the lid member 92 are rotated via the group 1 roller member 111 of the group 1 lens frame 10, and the cam cylinder 91 The other moving group that engages with is moved in the optical axis direction. When this configuration is used, the cam intersection angle (diameter) of the group 1 cam surface 91a that engages with the group 1 lens frame 10 should be small in order to keep the load of the drive unit 5 small. By using the configuration of the first embodiment, the diameter of the first group cam surface 91a can be made smaller than that of the other cam surfaces provided on the cam cylinder 91, so that the load on the drive unit 5 can be reduced. Since it is not necessary to use a large drive unit, the lens barrel can be made smaller.
図８（ａ）は、本発明の実施例２に係るレンズ鏡筒（光学機器）の概略側面図であり、左側は物体側、右側は像側である。図４と同一の参照符号を付した部材は図４と同様の機能を有する。以下、図４と異なる部分を中心に説明する。レンズ鏡筒は、複数の（ここでは、３つの）移動群２００１、２０１１、２０３１を有し、それぞれ、レンズ（光学素子）２００２、２０１２、２０３２を保持し、光軸Ｏに沿って移動可能に構成される。なお、移動群の数は限定されない。移動群（第１の移動群）２０３１は、コロ２０３３と２０３４を有する。コロ（第１のカムフォロア）２０３３は付勢部材２０３５の一端に係合し、カム筒２０５５の端面２０５６ｂに付勢（押圧、接触）される。コロ２０３４は固定部２０４５の端面２０４５ａと接触する。 FIG. 8A is a schematic side view of the lens barrel (optical device) according to the second embodiment of the present invention, with the left side being the object side and the right side being the image side. Members with the same reference numerals as those in FIG. 4 have the same functions as those in FIG. Hereinafter, the parts different from FIG. 4 will be mainly described. The lens barrel has a plurality of (here, three) moving groups 2001, 2011, 2031, holds lenses (optical elements) 2002, 2012, and 2032, respectively, and can move along the optical axis O. It is composed. The number of moving groups is not limited. The moving group (first moving group) 2031 has rollers 2033 and 2034. The roller (first cam follower) 2033 engages with one end of the urging member 2035 and is urged (pressed, contacted) with the end surface 2056b of the cam cylinder 2055. The roller 2034 comes into contact with the end face 2045a of the fixing portion 2045.
筐体部材２０４１、２０４３の間には、不図示のベアリングを介して光軸Ｏと平行なＸ軸の周りに回転可能に保持されたカム筒（カム部材）２０５５と蓋部材（押え部材）２０６０が設けられている。カム筒２０５５と蓋部材２０６０の回転軸はＸ軸と同軸であり、両者はＸ軸周りに一体的に回転するように構成されている。カム筒２０５５と蓋部材２０６０の接続方法は限定されない。 Between the housing members 2041 and 2043, a cam cylinder (cam member) 2055 and a lid member (pressing member) 2060 are rotatably held around the X axis parallel to the optical axis O via a bearing (not shown). Is provided. The rotation axes of the cam cylinder 2055 and the lid member 2060 are coaxial with the X axis, and both are configured to rotate integrally around the X axis. The connection method between the cam cylinder 2055 and the lid member 2060 is not limited.
図８（ａ）では、カム筒２０５５が不図示の駆動部によって駆動され、それにより、カム筒２０５５に係合している移動群２００１、２０１１、２０３１が光軸Ｏに沿って移動する。但し、いずれかの移動群や蓋部材２０６０が駆動部によって駆動されてもよい。カム筒２０５５は、円筒形状の不図示の基部、基部の外周に一体に設けられた第１のカム部２０５６、第１のカム部２０５６から突出した凸形状の第２のカム部（リブカム部）２０５７を有する。このように、カム筒２０５５は複数のカム部を有し、各カム部は一以上のカムとして機能する端面を有する。図４と同様に、基部の像側端面は、保持部２０４４に回転可能に支持され、物体側の端部は蓋部材２０６０と接続している。 In FIG. 8A, the cam cylinder 2055 is driven by a drive unit (not shown), whereby the moving groups 2001, 2011, and 2031 engaged with the cam cylinder 2055 move along the optical axis O. However, any of the moving groups or the lid member 2060 may be driven by the driving unit. The cam cylinder 2055 has a cylindrical base portion (not shown), a first cam portion 2056 integrally provided on the outer periphery of the base portion, and a convex second cam portion (rib cam portion) protruding from the first cam portion 2056. Has 2057. As described above, the cam cylinder 2055 has a plurality of cam portions, and each cam portion has an end face that functions as one or more cams. Similar to FIG. 4, the image-side end face of the base is rotatably supported by the holding portion 2044, and the object-side end is connected to the lid member 2060.
引張バネ２０１５により、コロ２０１３は第１のカム部２０５６上で第２のカム部２０５７の端面２０５７ａに付勢され、コロ２０１４は第１のカム部２０５６上で第２のカム部２０５７の端面２０５７ｂに付勢される。 The tension spring 2015 urges the roller 2013 on the first cam portion 2056 to the end face 2057a of the second cam portion 2057, and the roller 2014 on the first cam portion 2056 the end face 2057b of the second cam portion 2057. Be urged to.
付勢部材２０３５は、カム筒２０５５の最も像側に位置し、カムとして機能するカム筒２０５５の端面（第１の端面）２０５６ｂと、端面２０５６ｂに対向する筐体部材２０４３の端面（第２の端面）２０４５ａとの間に設けられる。端面２０４５ａは、端面２０５６ｂの像側にあり、付勢部材２０３５を押える。 The urging member 2035 is located on the most image side of the cam cylinder 2055, and has an end surface (first end surface) 2056b of the cam cylinder 2055 that functions as a cam and an end surface (second end surface) of the housing member 2043 that faces the end surface 2056b. It is provided between the end face and 2045a. The end face 2045a is on the image side of the end face 2056b and presses the urging member 2035.
付勢部材２０３５は、コロ２０３３をカム筒２０５５の複数のカムのうち筐体部材２０４３に最も近いカムとして機能する端面２０５６ｂに付勢する。ここで、付勢部材２０３５は、コロ２０３３が端面２０４５ａから離れる方向にコロ２０３３を付勢する。付勢部材２０３５は、（引張力ではなく）圧縮力をコロ２０３３に加え、圧縮バネやゴム等から構成される。付勢部材２０３５により、コロ２０３３は保持部２０４４上で第１のカム部２０５６の端面２０５６ｂに付勢され、コロ２０３４は保持部２０４４上で保持部２０４４から突出した固定部２０４５の端面２０４５ａに付勢される。固定部（押え部材）２０４５は付勢部材２０３５を押える機能を有する。蓋部材２０６０と同様に、最も像側の移動群２０３１に係合する固定部２０４５にもカム形状の高精度は要求されないので、コストアップを招かない。端面２０４５ａはＸ軸と直交する平面でもよい。移動群２００１については実施例１と同様の効果を得ることができる。なお、押え部材である固定部２０４５はカム筒２０５５の像側に設けられているが、蓋部材２０６０を像側に配置して物体側の固定部を押え部材として利用してもよい。 The urging member 2035 urges the roller 2033 to the end face 2056b that functions as the cam closest to the housing member 2043 among the plurality of cams of the cam cylinder 2055. Here, the urging member 2035 urges the roller 2033 in the direction in which the roller 2033 is separated from the end surface 2045a. The urging member 2035 is composed of a compression spring, rubber, etc. by applying a compressive force (not a tensile force) to the roller 2033. The roller 2033 is urged on the holding portion 2034 by the urging member 2035 to the end surface 2056b of the first cam portion 2056, and the roller 2034 is attached to the end surface 2045a of the fixing portion 2045 protruding from the holding portion 2044 on the holding portion 2044. Be forced. The fixing portion (pressing member) 2045 has a function of pressing the urging member 2035. Similar to the lid member 2060, the fixed portion 2045 that engages with the moving group 2031 on the image side is not required to have high precision in the cam shape, so that the cost is not increased. The end face 2045a may be a plane orthogonal to the X axis. The same effect as in Example 1 can be obtained for the moving group 2001. Although the fixing portion 2045 which is a pressing member is provided on the image side of the cam cylinder 2055, the lid member 2060 may be arranged on the image side and the fixing portion on the object side may be used as the pressing member.
図８（ｂ）はカム筒２０５５の断面図である。同図に丸で囲うように、第１のカム部２０５６と第２のカム部２０５７の位相は重複している。カム筒部材の外周から凸となる形状の複数のリブカムの位相を重複させた場合、カム筒部材を型割前後抜きで成型する事は不可能になる。しかし、第１のカム部２０５６はカム筒２０５５の端面に形成されており、外周から凸とならないため、カム筒２０５５の外周から凸となる第２のカム２０５７と位相を重複させても型割前後抜きで成型する事が可能となり、低コストで製造が可能となる。また、（Ｘ軸に端面（カム面）が直交している）テーパーのないリブカムを製造が可能であり、これによってコロに金属製のベアリングを使用することができる。このため、カムフォロアを樹脂製とする場合等に比べてレンズ鏡筒の耐久性は向上する。また、カム角度が大きくなり、駆動部による必要推力は小さくなるため、装置全体が小型化する。更に、移動群の数は限定されず、付勢部材２０３５は、複数の移動群のうち第１の移動群以外の移動群には接続されていない。即ち、移動群２０３１を他の移動群と接続しなくてもコロ２０３３をカム筒２０５５の端面２０５６ｂに係合させることができるので、設計の自由度も高い。 FIG. 8B is a cross-sectional view of the cam cylinder 2055. As shown in a circle in the figure, the phases of the first cam portion 2056 and the second cam portion 2057 overlap. When the phases of a plurality of rib cams having a shape protruding from the outer circumference of the cam cylinder member are overlapped, it becomes impossible to mold the cam cylinder member without cutting the mold before and after. However, since the first cam portion 2056 is formed on the end surface of the cam cylinder 2055 and does not become convex from the outer circumference, the mold is divided even if the phase overlaps with the second cam 2057 which becomes convex from the outer circumference of the cam cylinder 2055. It is possible to mold without front and back, and it is possible to manufacture at low cost. In addition, it is possible to manufacture a rib cam having no taper (the end surface (cam surface) is orthogonal to the X-axis), whereby a metal bearing can be used for the roller. Therefore, the durability of the lens barrel is improved as compared with the case where the cam follower is made of resin. In addition, the cam angle becomes large and the thrust required by the drive unit becomes small, so that the entire device is miniaturized. Further, the number of moving groups is not limited, and the urging member 2035 is not connected to any moving group other than the first moving group among the plurality of moving groups. That is, since the roller 2033 can be engaged with the end face 2056b of the cam cylinder 2055 without connecting the moving group 2031 to another moving group, the degree of freedom in design is high.
以下、図５乃至図８を参照して、実施例２に係るレンズ鏡筒（光学機器）の具体的な構成について説明する。図５（ａ）及び（ｂ）は、それぞれ、レンズ鏡筒のＷＩＤＥ位置（広角端位置）とＴＥＬＥ位置（望遠端位置）における要部側面図である。カム筒９４と蓋部材９２の回転に伴い、図５（ａ）の状態から図５（ｂ）の状態まで変倍動作が行われる。図６は、レンズ鏡筒の要部斜視図である。実施例１と同一の構成要素には同一の参照符号を付しており、以下、実施例１と異なる点を中心に説明する。実施例２のレンズ鏡筒の光学系の構成要素は実施例１と同様である。 Hereinafter, a specific configuration of the lens barrel (optical device) according to the second embodiment will be described with reference to FIGS. 5 to 8. 5 (a) and 5 (b) are side views of the main parts of the lens barrel at the WIDE position (wide-angle end position) and the TELE position (telephoto end position), respectively. As the cam cylinder 94 and the lid member 92 rotate, the scaling operation is performed from the state shown in FIG. 5A to the state shown in FIG. 5B. FIG. 6 is a perspective view of a main part of the lens barrel. The same components as those in the first embodiment are designated by the same reference numerals, and the differences from the first embodiment will be mainly described below. The components of the optical system of the lens barrel of the second embodiment are the same as those of the first embodiment.
カム筒（カム部材）９４と蓋部材（押え部材）９２は、前側筺体部材６の前側カム保持部６ａと後側筺体部材７１の後側カム保持部（押え部材）７１ａによって回転軸としてのＸ軸の周りに回転可能に保持されている。 The cam cylinder (cam member) 94 and the lid member (pressing member) 92 are X as a rotation axis by the front cam holding portion 6a of the front housing member 6 and the rear cam holding portion (pressing member) 71a of the rear housing member 71. It is held rotatably around the axis.
１群レンズ枠１０は１群カムフォロワ１１０を保持し、１群カムフォロワ１１０はカム筒９４と蓋部材９２と係合している。駆動部５の駆動力によって１群レンズ枠１０が光軸方向に進退するのに伴い、カム筒９１と蓋部材９２はＸ軸の周りに回転する。２群レンズ枠２０、３群レンズ枠３０、４群移動枠４１はカム筒９４に係合し、カム筒９４の回転に伴い、各々のカム軌跡に基づきそれぞれが光軸方向に進退する。 The group 1 lens frame 10 holds the group 1 cam follower 110, and the group 1 cam follower 110 is engaged with the cam cylinder 94 and the lid member 92. As the group 1 lens frame 10 moves back and forth in the optical axis direction due to the driving force of the driving unit 5, the cam cylinder 91 and the lid member 92 rotate around the X axis. The second group lens frame 20, the third group lens frame 30, and the fourth group moving frame 41 engage with the cam cylinder 94, and as the cam cylinder 94 rotates, each moves back and forth in the optical axis direction based on each cam trajectory.
図４と同様に、１群レンズ枠１０の１群カムフォロワ１１０は、二つの１群コロ部材１１１と伸縮可能な１群スライダ部材１１２と不図示の圧縮バネ（付勢手段）を有する。二つの１群コロ部材１１１は、１群スライダ部材１１２の長手方向に案内支持されると共に、お互いが離間する向きに圧縮バネによって付勢されている。 Similar to FIG. 4, the 1st group cam follower 110 of the 1st group lens frame 10 has two 1st group roller members 111, a stretchable 1st group slider member 112, and a compression spring (biasing means) (not shown). The two group 1 roller members 111 are guided and supported in the longitudinal direction of the group 1 slider member 112, and are urged by a compression spring in a direction in which they are separated from each other.
図７は、カム筒９４と蓋部材９２の斜視図である。カム筒９４は、円筒形状の支柱としての基部９４Ａ、基部９４Ａの外周に一体に設けられた第１のカム部９４Ｂ、第１のカム部９４Ｂから突出した（凸形状の）第２のカム部（リブカム部）９４Ｃを有する。基部９４Ａの像側の端面９４ｆは、不図示のベアリングを介して後側カム保持部７１ａによって回転可能に支持され、基部９４Ａの物体側端部は蓋部材９２の像側端部と接続している。蓋部材９２は、カム筒９４とは異なる部材として設けられ（別個の部材として製造され）、カム筒９４の基部９４Ａの物体側端部と一体的に接続している。 FIG. 7 is a perspective view of the cam cylinder 94 and the lid member 92. The cam cylinder 94 has a base portion 94A as a cylindrical support, a first cam portion 94B integrally provided on the outer periphery of the base portion 94A, and a second cam portion (convex shape) protruding from the first cam portion 94B. It has a (rib cam portion) 94C. The image-side end surface 94f of the base 94A is rotatably supported by the rear cam holding portion 71a via a bearing (not shown), and the object-side end of the base 94A is connected to the image-side end of the lid member 92. There is. The lid member 92 is provided as a member different from the cam cylinder 94 (manufactured as a separate member), and is integrally connected to the object-side end portion of the base portion 94A of the cam cylinder 94.
第１のカム部９４Ｂと第２のカム部９４Ｃはそれぞれ図８（ｂ）に示す第１のカム部２０５６と第２のカム部２０５７に対応し、両者の位相は重複している。これにより、図８（ｂ）と同様に、低コストで製造が可能になり、レンズ鏡筒の耐久性が向上し、小型化が可能になる。 The first cam portion 94B and the second cam portion 94C correspond to the first cam portion 2056 and the second cam portion 2057 shown in FIG. 8B, respectively, and their phases overlap. As a result, as in FIG. 8B, manufacturing becomes possible at low cost, the durability of the lens barrel is improved, and miniaturization becomes possible.
カム筒９４には、カム筒９４の最も物体側に位置し、カムとして機能する１群カム面９４ａが設けられ、蓋部材９２には、１群カム面９４ａに対向する１群カム押え面９２ａが設けられている。１群カム押え面９２ａは１群カム面９４ａの物体側に位置する。圧縮バネは、１群カム面９４ａ側の１群コロ部材１１１（第１のカムフォロア）を１群カム面９４ａに付勢する。また、圧縮バネは、１群カム面９４ａ側の１群コロ部材１１１が１群カム押え面９２ａから離れる方向に１群カム面９４ａ側の１群コロ部材１１１を付勢する。 The cam cylinder 94 is provided with a group 1 cam surface 94a located closest to the object side of the cam cylinder 94 and functions as a cam, and the lid member 92 is provided with a group 1 cam holding surface 92a facing the group 1 cam surface 94a. Is provided. The group 1 cam holding surface 92a is located on the object side of the group 1 cam surface 94a. The compression spring urges the group 1 roller member 111 (first cam follower) on the group 1 cam surface 94a side to the group 1 cam surface 94a. Further, the compression spring urges the 1st group roller member 111 on the 1st group cam surface 94a side in the direction in which the 1st group roller member 111 on the 1st group cam surface 94a side is separated from the 1st group cam pressing surface 92a.
１群カム押え面９２ａは１群カム面９４ａとの距離が略一定となるような形状を有し、その間に二つの１群コロ部材１１１が圧縮力で付勢されることで１群レンズ枠１０とカム筒９４が係合している。１群カム押え面９２ａと１群カム面９４ａとの距離の変動は、二つの１群コロ部材１１１間に働く圧縮バネの付勢力の変動が許容できる限り（あるいは駆動部５にとって許容できる限り）許容できる。図７において、１群カム押え面９２ａと１群カム面９４ａの間の部分はカム筒９４の基部９４Ａである。１群カム面９４ａ、基部９４Ａの表面、１群カム押え面９２ａは凹部を形成し、この凹部に１群カムフォロワ１１０が配置される。かかる構成によって、実施例１と同様に、レンズ鏡筒は小型で高い設計自由度を有する構成でレンズ鏡筒は移動群を移動することができる。 The group 1 cam holding surface 92a has a shape such that the distance from the group 1 cam surface 94a is substantially constant, and the two group 1 roller members 111 are urged by a compressive force between them to form a group 1 lens frame. 10 and the cam cylinder 94 are engaged with each other. The fluctuation of the distance between the 1st group cam holding surface 92a and the 1st group cam surface 94a is as long as the fluctuation of the urging force of the compression spring acting between the two 1st group roller members 111 is acceptable (or as long as it is acceptable for the drive unit 5). acceptable. In FIG. 7, the portion between the group 1 cam pressing surface 92a and the group 1 cam surface 94a is the base portion 94A of the cam cylinder 94. The first group cam surface 94a, the surface of the base 94A, and the first group cam pressing surface 92a form a recess, and the first group cam follower 110 is arranged in this recess. With such a configuration, as in the first embodiment, the lens barrel is small and has a high degree of freedom in design, and the lens barrel can move the moving group.
第２のカム部９４Ｃの両側には、２群カム面９４ｂと３群カム面９４ｃが設けられている。２群カム面９４ｂには２群レンズ枠２０に保持された２群コロ部材２１１が係合し、３群カム面９４ｃには３群レンズ枠３０に保持された３群コロ部材３１１が係合している。３４群付勢部材１１の付勢力により、第２のカム部９４Ｃを２群コロ部材２１１と３群コロ部材３１１がＸ軸方向の前後から挟むように係合することにより、２群レンズ枠２０及び３群レンズ枠３０とカム筒９４との係合がなされる。 A second group cam surface 94b and a third group cam surface 94c are provided on both sides of the second cam portion 94C. The second group roller member 211 held by the second group lens frame 20 is engaged with the second group cam surface 94b, and the third group roller member 311 held by the third group lens frame 30 is engaged with the third group cam surface 94c. doing. By the urging force of the 34 group urging member 11, the second cam portion 94C is engaged so that the 2nd group roller member 211 and the 3rd group roller member 311 are sandwiched from the front and back in the X-axis direction, so that the 2nd group lens frame 20 The third group lens frame 30 and the cam cylinder 94 are engaged with each other.
４群移動枠４１の４群カムフォロワ４２０は、二つの４群コロ部材４２１、収縮性のある４群スライダ部材４２２及び不図示の圧縮バネを有する。二つの４群コロ部材４２１が４群スライダ部材４２２の長手方向に案内支持されると共に、お互いが離間する向きに圧縮バネによって付勢されている。第１のカム部９４Ｂにはカム筒９４の最も像側に位置し、カムとして機能する４群カム面（第１の端面）９４ｄが設けられている。後側筺体部材７１の後側カム保持部７１ａには、４群カム面９４ｄの像側にあり、物体側の端面（第２の端面）である４群カム押え部７１ｂが設けられている。４群カム押え部７１ｂはＸ軸に直交する平面で足りる。４群カム面９４ｄと４群カム押え部７１ｂには、４群コロ部材４２１が圧縮された状態で係合している。４群カム押え部７１ｂは不図示の圧縮バネを押える機能を有する。このため、本実施例では、固定部である後側筐体部材７１の一部が押え部材として機能する。圧縮バネは、４群カム面９４ｄ側の４群コロ部材４２１（第１のカムフォロア）を４群カム面９４ｄに付勢している。また、付勢部材は、４群カム面９４ｄ側の４群コロ部材４２１が４群カム押え部７１ｂから離れる方向に４群カム面９４ｄ側の４群コロ部材４２１を付勢している。 The 4th group cam follower 420 of the 4th group moving frame 41 has two 4th group roller members 421, a contractile 4th group slider member 422, and a compression spring (not shown). The two 4-group roller members 421 are guided and supported in the longitudinal direction of the 4-group slider member 422, and are urged by compression springs in a direction in which they are separated from each other. The first cam portion 94B is provided with a fourth group cam surface (first end surface) 94d located on the image side of the cam cylinder 94 and functioning as a cam. The rear cam holding portion 71a of the rear housing member 71 is provided with a fourth group cam holding portion 71b which is on the image side of the fourth group cam surface 94d and is an end surface (second end surface) on the object side. The fourth group cam holding portion 71b suffices in a plane orthogonal to the X axis. The 4th group cam surface 94d and the 4th group cam holding portion 71b are engaged with the 4th group roller member 421 in a compressed state. The group 4 cam pressing portion 71b has a function of pressing a compression spring (not shown). Therefore, in this embodiment, a part of the rear housing member 71, which is a fixing portion, functions as a pressing member. The compression spring urges the 4th group roller member 421 (first cam follower) on the 4th group cam surface 94d side to the 4th group cam surface 94d. Further, as the urging member, the 4th group roller member 421 on the 4th group cam surface 94d side urges the 4th group roller member 421 on the 4th group cam surface 94d side in the direction away from the 4th group cam holding portion 71b.
４群カム面９４ｄは回転するカム筒９４に設けられ、４群カム押え部７１ｂは固定部材である後側筺体部材７１に設けられているため、４群カムフォロワ４２０は回転子と固定子の両方に係合することになる。しかし、４群カムフォロワ４２０はそれぞれの面に転動する４群コロ部材４２１にて接しているため、変倍動作の間、力のこじれ等の発生がなく安定して係合し続けることができる。また、４群カム押え部７１ｂは、光軸Ｏに略垂直な平面で足りるため、４群カム面９４ｄのような高い加工精度を要しない。このため、後側筺体部材７１にカム部材としての機能を設けても、後側筺体部材７１のコストは増加しない。 Since the 4th group cam surface 94d is provided on the rotating cam cylinder 94 and the 4th group cam holding portion 71b is provided on the rear housing member 71 which is a fixing member, the 4th group cam follower 420 has both a rotor and a stator. Will be engaged in. However, since the 4th group cam follower 420 is in contact with the 4th group roller member 421 that rolls on each surface, it is possible to continue to engage stably without generating force twisting during the scaling operation. .. Further, since the 4th group cam holding portion 71b requires a plane substantially perpendicular to the optical axis O, it does not require high processing accuracy as in the 4th group cam surface 94d. Therefore, even if the rear housing member 71 is provided with a function as a cam member, the cost of the rear housing member 71 does not increase.
本実施形態の光学機器は、カム部材（カム筒９１、９４、２０５０、２０５５）と、押え部材（蓋部材９２、２０６０、固定部７１ａ、２０４５）と、付勢部材（２００５、２０３５）を有する。カム部材は、複数の移動群（１０、２０、３０、４０、４１、２００１、２０１１、２０２１、２０３１）の移動を案内する複数のカムを有し、光軸方向に平行なＸ軸の周りで回転可能である。付勢部材は、第１のカムフォロア（１１１、２００３、２０３３）を第１の端面（９１ａ、９４ａ、２０５１ａ、２０５６ａ、２０５６ｂ）に付勢する。押え部材は、付勢部材を押える（付勢部材（の端部）がある方向に動かないようにする）押え部を有する。付勢部材は、押え部から第１のカムフォロアが離れる方向に第１のカムフォロアを付勢する。このような構成によって第１のカムフォロアを外側にある第２の端面側から付勢できるので、小型化と設計の自由度を向上することができる。 The optical device of the present embodiment has a cam member (cam cylinders 91, 94, 2050, 2055), a pressing member (lid members 92, 2060, fixing portions 71a, 2045), and an urging member (2005, 2035). .. The cam member has a plurality of cams that guide the movement of the plurality of movement groups (10, 20, 30, 40, 41, 2001, 2011, 2021, 2031) around the X-axis parallel to the optical axis direction. It is rotatable. The urging member urges the first cam followers (111, 2003, 2033) to the first end faces (91a, 94a, 2051a, 2056a, 2056b). The pressing member has a pressing portion that presses the urging member (prevents the urging member (end) from moving in a certain direction). The urging member urges the first cam follower in the direction in which the first cam follower separates from the holding portion. With such a configuration, the first cam follower can be urged from the second end face side on the outside, so that the miniaturization and the degree of freedom in design can be improved.
前記押え部は、第１の端面と対向する第２の端面（９２ａ、２０６２ａ、２０４５ａ）であってもよい。第１の端面は、カム部材の最も物体側または最も像側に位置してもよい。これにより、設計の自由度を向上することができる。押え部材は、第１の端面の物体側および像側のうちカム部材に対して第１の端面が位置する側にあり、例えば、第１の端面がカム部材の最も物体側の端面であれば、第２の端面は第１の端面の物体側にあってもよい。 The pressing portion may be a second end face (92a, 2062a, 2045a) facing the first end face. The first end face may be located on the most object side or the most image side of the cam member. As a result, the degree of freedom in design can be improved. The pressing member is located on the object side and the image side of the first end face on the side where the first end face is located with respect to the cam member. For example, if the first end face is the end face on the most object side of the cam member. , The second end face may be on the object side of the first end face.
付勢部材は、例えば、（引張力ではなく）圧縮力を前記第１のカムフォロアに加える。付勢部材は、複数の移動群のうち第１の移動群以外の移動群には接続されていないことが好ましい。これにより、小型化を向上することができる。付勢部材は、例えば、圧縮バネ又はゴム（弾性部材）である。第２の端面は、光軸方向に平行な軸に直交する平面であってもよい。これにより、製造が容易になる。 The urging member applies, for example, a compressive force (rather than a tensile force) to the first cam follower. It is preferable that the urging member is not connected to a moving group other than the first moving group among the plurality of moving groups. Thereby, miniaturization can be improved. The urging member is, for example, a compression spring or rubber (elastic member). The second end face may be a plane orthogonal to an axis parallel to the optical axis direction. This facilitates manufacturing.
押え部材は樹脂材料によって構成されてもよい。これにより、製造が容易になる。各カムフォロアは金属材料から構成されてもよい。これにより、耐久性が向上する。光学機器は、第１の移動群、カム部材、又は押え部材を光軸方向に移動する駆動手段（２００９）を有してもよい（移動群を駆動する場合は移動群を介してカム筒が回転する）。複数の移動群の中で第１のカムフォロアのストロークが最も長くてもよい。この場合に本発明は特に有効である。 The presser member may be made of a resin material. This facilitates manufacturing. Each cam follower may be composed of a metallic material. This improves durability. The optical instrument may have a driving means (2009) for moving the first moving group, the cam member, or the pressing member in the optical axis direction (when driving the moving group, the cam cylinder is moved via the moving group. Rotate). The stroke of the first cam follower may be the longest among the plurality of moving groups. In this case, the present invention is particularly effective.
第１の端面は、カム部材の最も物体側の端面または最も像側の端面であってもよい。カム部材と押え部材とは同軸であってもよい。第１の部材は、第１のカム部（９４Ｂ）と、第１のカム部の周りに第１のカム部から突出して設けられた第２のカム部（９４Ｃ）と、を有し、第１のカム部の位相と第２のカム部の位相は、光軸方向に直交する断面において重複してもよい。 The first end face may be the end face on the most object side or the end face on the image side of the cam member. The cam member and the pressing member may be coaxial. The first member has a first cam portion (94B) and a second cam portion (94C) provided around the first cam portion so as to project from the first cam portion. The phase of the first cam portion and the phase of the second cam portion may overlap in a cross section orthogonal to the optical axis direction.
以上説明したように、本発明によれば、高い設計自由度を有してカムを利用して移動群を移動させることが可能な小型の光学機器を提供することができる。 As described above, according to the present invention, it is possible to provide a small optical device having a high degree of freedom in design and capable of moving a moving group by using a cam.
以上、本発明の好ましい実施形態について説明したが、本発明はこれらの実施形態に限定されず、その要旨の範囲内で種々の変形及び変更が可能である。 Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications and modifications can be made within the scope of the gist thereof.
１、２、３、４、２００２、２０１２、２０２２、２０３２…光学素子、１１１…１群コロ部材（第１のカムフォロア）、２００３、２０１３、２０２３、２０３３…コロ（カムフォロア）、１０、２０、３０、４０、４１、２００１、２０１１、２０２１、２０３１…レンズ枠（移動群）、９１、９４、２０５０、２０５５…カム筒（カム部材）、９２、２０６０…蓋部材（押え部材）、７１ａ、２０４５…固定部（押え部材）、２００５、２０３５…付勢手段、９１ａ、９４ａ、２０５１ａ、２０５６ａ、２０５６ｂ…第１の端面、９２ａ、２０６２ａ…第２の端面（押え部）、１０、４１、２００１、２０３１…第１の移動群 1, 2, 3, 4, 2002, 2012, 2022, 2032 ... Optical element, 111 ... Group 1 roller member (first cam follower), 2003, 2013, 2023, 2033 ... Roller (cam follower), 10, 20, 30 , 40, 41, 2001, 2011, 2021, 2031 ... Lens frame (moving group), 91, 94, 2050, 2055 ... Cam cylinder (cam member), 92, 2060 ... Lid member (pressing member), 71a, 2045 ... Fixed portion (holding member), 2005, 2035 ... Biasing means, 91a, 94a, 2051a, 2056a, 2056b ... First end face, 92a, 2062a ... Second end face (holding part), 10, 41, 2001, 2031 … First moving group
Claims (17)
前記複数の移動群の移動を案内する複数のカムを有し、前記光軸方向に平行な軸の周りに回転可能なカム部材と、
前記複数の移動群のうち第１の移動群の第１のカムフォロアを、前記カム部材の前記カムの第１の端面に付勢する付勢部材と、
前記付勢部材を押える押え部を有する押え部材と、
を有し、
前記付勢部材は、前記押え部から前記第１のカムフォロアが離れる方向に前記第１のカムフォロアを付勢することを特徴とする光学機器。 A plurality of moving groups, each of which has an optical element and a cam follower and can move in the optical axis direction,
A cam member having a plurality of cams for guiding the movement of the plurality of movement groups and rotating around an axis parallel to the optical axis direction,
A urging member that urges the first cam follower of the first moving group among the plurality of moving groups to the first end face of the cam of the cam member.
A pressing member having a pressing portion for pressing the urging member,
Have,
The urging member is an optical device that urges the first cam follower in a direction in which the first cam follower separates from the holding portion.
前記第１のカム部の位相と前記第２のカム部の位相は、前記光軸方向に直交する断面において重複していることを特徴とする請求項１乃至１４のうちいずれか１項に記載の光学機器。 The first member has a first cam portion and a second cam portion provided around the first cam portion so as to project from the first cam portion.
The aspect of any one of claims 1 to 14, wherein the phase of the first cam portion and the phase of the second cam portion overlap in a cross section orthogonal to the optical axis direction. Optical equipment.
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