JP5677533B2 - Conversion adapter device and interchangeable lens system - Google Patents

Conversion adapter device and interchangeable lens system Download PDF

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JP5677533B2
JP5677533B2 JP2013165920A JP2013165920A JP5677533B2 JP 5677533 B2 JP5677533 B2 JP 5677533B2 JP 2013165920 A JP2013165920 A JP 2013165920A JP 2013165920 A JP2013165920 A JP 2013165920A JP 5677533 B2 JP5677533 B2 JP 5677533B2
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communication contact
contact group
lens
camera body
conversion adapter
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JP2013232015A (en
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俊史 浦上
俊史 浦上
海原　昇二
昇二 海原
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Canon Inc
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Description

本発明は、変換アダプタ装置及び交換レンズシステムに関する。   The present invention relates to a conversion adapter device and an interchangeable lens system.

デジタル一眼レフカメラの小型化・軽量化への要望に応えるため、近年、従来のデジタル一眼レフカメラとは異なる新しいタイプの一眼レフカメラが提案されている。新しいタイプの一眼レフカメラは、撮影光束をファインダーへ導くためのクイックリターンミラーが設けられておらず、また、フランジバックが従来のカメラより短い。上記のような新しいタイプのカメラに対応した、フランジバックの短い新しいタイプの交換レンズが提案されている。しかし、上記の新しいタイプの交換レンズは、品種が少なく、様々な撮影条件に対応することは困難である。従って、既に市場に導入され、品種及び数量が豊富な従来タイプの交換レンズを新しいタイプのカメラに使用したい場合がある。そのためには、従来タイプの交換レンズと新しいタイプのカメラ本体とを接続するための変換アダプタが必要である。この変換アダプタに求められる機能は、主に、レンズとカメラ本体とで異なるマウント形状の整合をとること、レンズとカメラ本体とで異なるフランジバックを整合させること、レンズとカメラ本体の通信システムを阻害しないことである。   In order to meet the demand for downsizing and weight reduction of digital single-lens reflex cameras, a new type of single-lens reflex camera different from conventional digital single-lens reflex cameras has been proposed in recent years. The new type single-lens reflex camera does not have a quick return mirror for guiding the photographing light flux to the viewfinder, and has a shorter flange back than the conventional camera. A new type of interchangeable lens with a short flange back has been proposed that is compatible with the new type of camera described above. However, the above-mentioned new type of interchangeable lens has few varieties, and it is difficult to cope with various photographing conditions. Therefore, there are cases where it is desired to use a conventional type interchangeable lens that has already been introduced to the market and has a wide variety of products and quantities for a new type of camera. For this purpose, a conversion adapter for connecting a conventional type interchangeable lens and a new type camera body is required. The functions required for this conversion adapter are mainly to match different mount shapes between the lens and camera body, align different flange backs between the lens and camera body, and hinder the communication system between the lens and camera body. Is not to.

変換アダプタに必須の機能であるカメラ本体と交換レンズとの通信を可能とするため、変換アダプタには、通信接点が設けられている。変換アダプタの、カメラ本体側に接続する通信接点と交換レンズ側に接続する通信接点とで、カメラ光軸周りの位置が同じ位置に設けられている変換アダプタが提案されている。この変換アダプタにおいては、例えば、カメラ本体側に接続する通信接点（カメラ本体側通信接点）と交換レンズ側に接続する通信接点（レンズ側通信接点）という対応する２つの通信接点を電気的に接続する導通部材が設けられている。
なお、下記の特許文献１は、カメラ本体より出力された制御信号を第１の信号形態で第１のレンズユニットへと通信することによってこれを制御する交換レンズシステムにおける変換アダプタ装置を開示している。この変換アダプタ装置は、カメラ本体に上記第１の信号形態と異なる第２の信号形態の制御情報によって制御される第２のレンズユニットを接続可能とする。 In order to enable communication between the camera body and the interchangeable lens, which is an essential function of the conversion adapter, the conversion adapter is provided with a communication contact. A conversion adapter has been proposed in which a communication contact connected to the camera body side and a communication contact connected to the interchangeable lens side of the conversion adapter are provided at the same position around the camera optical axis. In this conversion adapter, for example, two corresponding communication contacts, a communication contact connected to the camera body (camera body communication contact) and a communication contact (lens communication contact) connected to the interchangeable lens, are electrically connected. A conducting member is provided.
Patent Document 1 below discloses a conversion adapter device in an interchangeable lens system that controls a control signal output from a camera body by communicating it with a first signal unit in a first signal form. Yes. This conversion adapter device enables connection of a second lens unit controlled by control information of a second signal form different from the first signal form to the camera body.

特開平４−２７３６７１号公報JP-A-4-273671

しかし、上述した新しいタイプのカメラのカメラ本体のフランジバックと従来タイプの交換レンズのフランジバックとが近い場合、変換アダプタの厚みを薄くする必要がある。変換アダプタの厚みが薄い場合、変換アダプタのカメラ本体側通信接点とレンズ側通信接点とをカメラ光軸周りの位置が同じ位置に設けることは、スペース的に近すぎて困難である。また、カメラ本体側通信接点とレンズ側通信接点のカメラ光軸周りの位置が近い場合には、これらの通信接点同士を導通させる導通部材のレイアウトも困難となる。また、カメラ本体側通信接点とレンズ側通信接点と導通部材部の組立作業性が悪くなる。
本発明は、フランジバックの異なるカメラ本体と交換レンズの装着を可能とする変換アダプタ装置であって、カメラ側の通信接点とレンズ側の通信接点のレイアウト、通信接点を導通させる導通部材のレイアウトを向上させる変換アダプタ装置の提供を目的とする。 However, when the flange back of the camera body of the new type camera described above is close to the flange back of the conventional interchangeable lens, it is necessary to reduce the thickness of the conversion adapter. When the thickness of the conversion adapter is thin, it is difficult to provide the camera body side communication contact and the lens side communication contact of the conversion adapter at the same position around the optical axis of the camera because the space is too close. In addition, when the positions of the camera body side communication contact and the lens side communication contact around the camera optical axis are close to each other, it is difficult to lay out a conductive member that conducts these communication contacts. Further, the assembly workability of the camera body side communication contact, the lens side communication contact, and the conducting member portion is deteriorated.
The present invention is a conversion adapter device that enables mounting of a camera body and an interchangeable lens with different flange backs, and includes a layout of communication contacts on the camera side and a communication contact on the lens side, and a layout of a conductive member that conducts the communication contacts. An object of the present invention is to provide an improved conversion adapter device.

本発明の一実施形態の変換アダプタ装置は、カメラ本体と交換レンズとを接続する変換アダプタ装置である。変換アダプタ装置は、前記カメラ本体に装着可能に設けられたカメラ本体側取り付け部と、前記交換レンズに装着可能に設けられたレンズ側取り付け部と、前記カメラ本体側取り付け部に軸周りに設けられ、前記カメラ本体の通信接点群と接する第１の通信接点群と、前記レンズ側取り付け部に前記軸周りに設けられ、前記交換レンズの通信接点群と接する第２の通信接点群と、前記第１の通信接点群と前記第２の通信接点群とを電気的に接続する導通部材とを備え、前記第１の通信接点群は前記第２の通信接点群にない接点を前記第１の通信接点群の端に設けることで前記第２の通信接点群に含まれる接点の数よりも前記第１の通信接点群に含まれる接点の数が多く、かつ前記第１の通信接点群の前記軸からの距離は、前記第２の通信接点群の前記軸からの距離よりも短い。 The conversion adapter apparatus of one Embodiment of this invention is a conversion adapter apparatus which connects a camera main body and an interchangeable lens. The conversion adapter device is provided around the axis of the camera body side mounting portion provided so as to be attachable to the camera body, the lens side mounting portion provided so as to be attachable to the interchangeable lens, and the camera body side mounting portion. , A first communication contact group in contact with the communication contact group of the camera body, a second communication contact group provided around the axis in the lens side mounting portion, and in contact with the communication contact group of the interchangeable lens; A communication member that electrically connects the first communication contact group and the second communication contact group, and the first communication contact group includes a contact that does not exist in the second communication contact group. By providing at the end of the contact group, the number of contacts included in the first communication contact group is larger than the number of contacts included in the second communication contact group , and the axis of the first communication contact group The distance from the second communication contact Shorter than the distance from said axis.

本発明の変換アダプタ装置によれば、フランジバックの異なるカメラ本体と交換レンズの装着を可能とするとともに、変換アダプタ装置のカメラ側の通信接点とレンズ側の通信接点のレイアウトを改善させることができる。また、本発明の変換アダプタ装置によれば、変換アダプタ装置が備える対応する通信接点同士を導通させる導通部材のレイアウトや、通信接点と導通部材の組立作業性を向上させることができる。   According to the conversion adapter device of the present invention, it is possible to mount the camera body and the interchangeable lens having different flange backs, and to improve the layout of the communication contact on the camera side and the communication contact on the lens side of the conversion adapter device. . Moreover, according to the conversion adapter apparatus of this invention, the layout of the conduction | electrical_connection member which conducts the communication contacts with which a conversion adapter apparatus is equipped, and the assembly workability | operativity of a communication contact and a conduction | electrical_connection member can be improved.

変換アダプタ装置を備えるカメラ全体の概略構成例を示す図である。It is a figure which shows the example of schematic structure of the whole camera provided with the conversion adapter apparatus. 変換アダプタの構成を示す図である。It is a figure which shows the structure of a conversion adapter. 変換アダプタ装置を備えるカメラ全体の概略構成例を示す図である。It is a figure which shows the example of schematic structure of the whole camera provided with the conversion adapter apparatus. 変換アダプタの構成を示す図である。It is a figure which shows the structure of a conversion adapter.

図１は、本発明の第１の実施形態の変換アダプタ装置を備えるカメラ全体の概略構成例を示す図である。図１に示すカメラは、例えば、複数の撮像光学系を制御して平面画像撮影又は立体画像撮影を実行するデジタルカメラやビデオカメラである。図１に示すカメラは、カメラ本体１０と、交換レンズ２０と、カメラ本体１０と交換レンズ２０とを接続する変換アダプタ３０とを備える。カメラ本体１０は、従来タイプのカメラよりフランジバックが短い新しいタイプのカメラである。交換レンズ２０は、変換アダプタ３０を介してカメラ本体１０に装着された状態となっている。カメラ本体１０と交換レンズ２０とは、それぞれのマウント部の規格が異なり、直接装着は不可能である。また、カメラ本体１０と交換レンズ２０とは、フランジバックが異なる。カメラ本体１０のフランジバックは、カメラ本体１０の交換レンズ２０を取り付ける基準面から撮像素子の撮像面までの距離である。また、交換レンズ２０のフランジバックは、交換レンズ２０のカメラ本体１０を取り付ける基準面から焦点位置までの距離である。   FIG. 1 is a diagram illustrating a schematic configuration example of an entire camera including the conversion adapter device according to the first embodiment of the present invention. The camera shown in FIG. 1 is, for example, a digital camera or a video camera that controls a plurality of imaging optical systems to execute planar image shooting or stereoscopic image shooting. The camera shown in FIG. 1 includes a camera body 10, an interchangeable lens 20, and a conversion adapter 30 that connects the camera body 10 and the interchangeable lens 20. The camera body 10 is a new type of camera having a shorter flange back than a conventional type camera. The interchangeable lens 20 is attached to the camera body 10 via the conversion adapter 30. The camera body 10 and the interchangeable lens 20 have different mount standards and cannot be mounted directly. Further, the camera body 10 and the interchangeable lens 20 have different flange backs. The flange back of the camera body 10 is the distance from the reference plane to which the interchangeable lens 20 of the camera body 10 is attached to the imaging surface of the imaging device. The flange back of the interchangeable lens 20 is the distance from the reference plane to which the camera body 10 of the interchangeable lens 20 is attached to the focal position.

カメラ本体１０は、カメラ本体側マウント部１１、カメラ側通信接点群１２、中央処理装置（ＭＰＵ：Micro Processing Unit）１００、撮像素子４００を備える。カメラ本体１０には、クイックリターンミラーや専用の焦点検出ユニット等は設けられていない。ＭＰＵ１００は、カメラの動作制御を行う制御部であり、カメラシステムの様々な要素に対して様々な処理や指示を実行する。撮像素子４００は、撮影光学系によって結像された被写体像を電気信号に変換する撮像デバイスである。本実施形態では撮像素子４００としてＣＭＯＳ（Complementary Metal Oxide Semiconductor）センサが用いられる。撮像素子４００として、ＣＣＤ（Charge Coupled Device）型及びＣＩＤ（Charge-injection Device）型等様々な形態の撮像デバイスを用いてもよい。撮像素子４００の電気信号はアナログ／デジタル（Ａ／Ｄ）変換された後、公知の種々の信号処理が施される。カメラ本体側マウント部１１は、カメラ本体１０の被写体側（交換レンズ側）の端部に設けられている。カメラ本体側マウント部１１の被写体側の端面にマウント面１１ａが設けられている。そして、カメラ側通信接点群１２が、カメラ本体側マウント部１１に設けられている。   The camera body 10 includes a camera body side mount unit 11, a camera side communication contact group 12, a central processing unit (MPU: Micro Processing Unit) 100, and an image sensor 400. The camera body 10 is not provided with a quick return mirror or a dedicated focus detection unit. The MPU 100 is a control unit that controls the operation of the camera, and executes various processes and instructions for various elements of the camera system. The imaging device 400 is an imaging device that converts a subject image formed by a photographing optical system into an electrical signal. In this embodiment, a CMOS (Complementary Metal Oxide Semiconductor) sensor is used as the image sensor 400. As the imaging element 400, various types of imaging devices such as a CCD (Charge Coupled Device) type and a CID (Charge-injection Device) type may be used. The electric signal of the image sensor 400 is subjected to analog / digital (A / D) conversion and then subjected to various known signal processing. The camera body side mount unit 11 is provided at the end of the camera body 10 on the subject side (interchangeable lens side). A mount surface 11 a is provided on the subject-side end surface of the camera body side mount unit 11. A camera side communication contact group 12 is provided on the camera body side mount unit 11.

交換レンズ２０は、レンズ側マウント部２１、レンズ側通信接点群２２、撮影レンズ２００、レンズ制御回路２０１、ＡＦ駆動回路２０２、絞り駆動回路２０３、絞り２０４を備える。撮影レンズ２００は、合焦させる被写体までの距離に応じて、不図示のレンズ枠やアクチュエータなどのレンズ移動手段によって、光軸方向に移動可能に保持されている。なお、図１では便宜上１枚の撮影レンズ２００を図示しているが、撮影レンズ２００は、実際には多数のレンズ群を有する。レンズ制御回路２０１は、ＭＰＵ１００との間で通信を行い、ＡＦ駆動回路２０２及び絞り駆動回路２０３を介して交換レンズ２０内の撮影レンズ２００及び絞り２０４の駆動を行う。ＡＦ駆動回路２０２は、例えばステッピングモータによって構成され、レンズ制御回路２０１の制御により撮影レンズ２００内のフォーカスレンズ位置を変化させ、撮像素子に撮影光束の焦点を合わせるように調整する。絞り駆動回路２０３は、例えばオートアイリス等によって構成され、レンズ制御回路２０１の制御により絞り２０４を変化させ、光学的な絞り値を得る。レンズ側マウント部２１は、交換レンズ２０の撮影者側（カメラ本体側）の端部に設けられている。レンズ側マウント部２１の撮影者側の端面にマウント面２１ａが設けられている。そして、レンズ側通信接点群２２が、レンズ側マウント部２１に設けられている。   The interchangeable lens 20 includes a lens side mount unit 21, a lens side communication contact group 22, a photographing lens 200, a lens control circuit 201, an AF drive circuit 202, an aperture drive circuit 203, and an aperture 204. The taking lens 200 is held so as to be movable in the optical axis direction by a lens moving means such as a lens frame (not shown) or an actuator according to the distance to the subject to be focused. In FIG. 1, one photographic lens 200 is illustrated for convenience, but the photographic lens 200 actually has a large number of lens groups. The lens control circuit 201 communicates with the MPU 100 and drives the photographing lens 200 and the diaphragm 204 in the interchangeable lens 20 via the AF driving circuit 202 and the diaphragm driving circuit 203. The AF drive circuit 202 is configured by, for example, a stepping motor, and changes the focus lens position in the photographing lens 200 under the control of the lens control circuit 201 so as to adjust the focus of the photographing light flux on the image sensor. The aperture driving circuit 203 is configured by, for example, an auto iris or the like, and changes the aperture 204 under the control of the lens control circuit 201 to obtain an optical aperture value. The lens side mount portion 21 is provided at the end of the interchangeable lens 20 on the photographer side (camera body side). A mount surface 21 a is provided on the end surface on the photographer side of the lens side mount portion 21. The lens side communication contact group 22 is provided on the lens side mount portion 21.

変換アダプタ３０は、本実施形態の変換アダプタ装置であって、カメラ本体１０と交換レンズ２０とを接続する。変換アダプタ３０は、カメラ本体側取り付け部３１、カメラ本体側通信接点群３２、レンズ側取り付け部３３、レンズ側通信接点群３４を備える。本実施形態では、変換アダプタ３０は略円環形状をしているが、変換アダプタ３０の形状は円環形状に限定されない。カメラ本体側取り付け部３１は、変換アダプタ３０の一方の端部に設けられ、カメラ本体１０のマウント部の規格に対応している。すなわち、カメラ本体側取り付け部３１は、カメラ本体１０に装着可能に設けられている。カメラ本体側取り付け部３１は、カメラ本体側の端面にカメラ本体側取り付け面３１ａを有する。そして、カメラ本体１０のマウント面１１ａとカメラ本体側取り付け面３１ａとが接する形態でカメラ本体１０が装着可能である。カメラ本体側取り付け部３１には、カメラ本体側通信接点群３２が設けられている。カメラ本体側通信接点群３２は、第１の通信接点群であって、カメラ本体側取り付け部３１にカメラ本体１０を装着した場合に、カメラ本体側マウント部１１に設けられたカメラ側通信接点群１２と接する。   The conversion adapter 30 is the conversion adapter device of the present embodiment, and connects the camera body 10 and the interchangeable lens 20. The conversion adapter 30 includes a camera body side attachment portion 31, a camera body side communication contact group 32, a lens side attachment portion 33, and a lens side communication contact group 34. In the present embodiment, the conversion adapter 30 has a substantially annular shape, but the shape of the conversion adapter 30 is not limited to the annular shape. The camera main body side attaching portion 31 is provided at one end of the conversion adapter 30 and corresponds to the standard of the mount portion of the camera main body 10. That is, the camera body side attachment portion 31 is provided so as to be attachable to the camera body 10. The camera body-side mounting portion 31 has a camera body-side mounting surface 31a on the end surface on the camera body side. The camera body 10 can be mounted in a form in which the mount surface 11a of the camera body 10 and the camera body-side mounting surface 31a are in contact with each other. The camera body side attachment portion 31 is provided with a camera body side communication contact group 32. The camera body side communication contact group 32 is a first communication contact group, and when the camera body 10 is mounted on the camera body side mounting part 31, the camera side communication contact group provided on the camera body side mount part 11 is provided. Twelve.

レンズ側取り付け部３３は、カメラ本体側取り付け部３１に対向する端部に設けられており、交換レンズ２０のマウント部の規格に対応している。すなわち、レンズ側取り付け部３３は、交換レンズ２０に装着可能に設けられている。レンズ側取り付け部３３は、交換レンズ側の端面にレンズ側取り付け面３３ａを有する。そして、交換レンズ２０のマウント面２１ａとレンズ側取り付け面３３ａとが接する形態で交換レンズ２０が装着可能である。レンズ側取り付け部３３には、レンズ側通信接点群３４が設けられている。レンズ側通信接点群３４は、第２の通信接点群であって、レンズ側取り付け部３３に交換レンズ２０を装着した場合に、レンズ側マウント部２１に設けられたレンズ側通信接点群２２と接する。   The lens side mounting portion 33 is provided at the end facing the camera body side mounting portion 31 and corresponds to the standard of the mount portion of the interchangeable lens 20. That is, the lens side attaching portion 33 is provided so as to be attachable to the interchangeable lens 20. The lens side attachment portion 33 has a lens side attachment surface 33a on the end surface on the interchangeable lens side. The interchangeable lens 20 can be mounted in a form in which the mount surface 21a of the interchangeable lens 20 and the lens side mounting surface 33a are in contact with each other. The lens side attachment portion 33 is provided with a lens side communication contact group 34. The lens side communication contact group 34 is a second communication contact group, and contacts the lens side communication contact group 22 provided on the lens side mount portion 21 when the interchangeable lens 20 is mounted on the lens side mounting portion 33. .

また、本実施形態では、変換アダプタ３０のカメラ本体側通信接点群３２とレンズ側通信接点群３４とは、光軸（カメラ光軸）を挟んで互いに対向する位置に設けられている。カメラ本体側通信接点群３２とレンズ側通信接点群３４と、フレキシブルプリント基板やリード線などの導通部材３０１によって電気的に接続されている。これにより、ＭＰＵ１００は、交換レンズ２０内のレンズ制御回路２０１と、カメラ側通信接点群１２、カメラ本体側通信接点群３２、導通部材３０１、レンズ側通信接点群３４、２２を介して、様々な通信を行うことができる。例えば、ＭＰＵ１００は、レンズ制御回路２０１に対して、レンズ着脱通信、レンズデータ通信、レンズ駆動通信等を行うことができる。   In the present embodiment, the camera body side communication contact group 32 and the lens side communication contact group 34 of the conversion adapter 30 are provided at positions facing each other across the optical axis (camera optical axis). The camera body side communication contact group 32 and the lens side communication contact group 34 are electrically connected by a conductive member 301 such as a flexible printed circuit board or a lead wire. As a result, the MPU 100 performs various operations via the lens control circuit 201 in the interchangeable lens 20, the camera side communication contact group 12, the camera body side communication contact group 32, the conducting member 301, and the lens side communication contact groups 34 and 22. Communication can be performed. For example, the MPU 100 can perform lens attachment / detachment communication, lens data communication, lens drive communication, and the like to the lens control circuit 201.

ここで、図１中に示す変換アダプタ３０の厚み（カメラ本体側取り付け面３１ａからレンズ側取り付け面３３ａまでの光軸方向における距離）はＣである。図１中に示すように、カメラ本体１０のフランジバックをＡ、交換レンズ２０のフランジバックをＢとすると、Ｃ＝Ｂ−Ａの関係が成り立つ。すなわち、カメラ本体１０のフランジバックが交換レンズ２０のフランジバックより短く、変換アダプタ３０の厚みが、カメラ本体１０のフランジバックと交換レンズ２０のフランジバックとの差に相当する。本実施形態では、カメラ本体１０のフランジバックＡと交換レンズ２０のフランジバックＢとの差Ｃ（＝Ｂ−Ａ）の厚みを持った変換アダプタ３０を用いることで、両者のフランジバックを合わせる（整合させる）ことができる。   Here, the thickness of the conversion adapter 30 shown in FIG. 1 (the distance in the optical axis direction from the camera body side mounting surface 31a to the lens side mounting surface 33a) is C. As shown in FIG. 1, when the flange back of the camera body 10 is A and the flange back of the interchangeable lens 20 is B, the relationship C = B−A is established. That is, the flange back of the camera body 10 is shorter than the flange back of the interchangeable lens 20, and the thickness of the conversion adapter 30 corresponds to the difference between the flange back of the camera body 10 and the flange back of the interchangeable lens 20. In this embodiment, by using the conversion adapter 30 having a thickness C (= B−A) between the flange back A of the camera body 10 and the flange back B of the interchangeable lens 20, both flange backs are matched ( Can be matched).

本実施形態の交換レンズシステムは、図１を参照して上述した本実施形態の変換アダプタ装置を備える交換レンズシステムとして実現することができる。本実施形態の変換アダプタ装置又は交換レンズシステムによれば、ユーザが、マウント規格やフランジバック規格の違いに影響されることなく、カメラ本体１０に交換レンズ２０を装着して、正常に撮影することが可能となる。   The interchangeable lens system of the present embodiment can be realized as an interchangeable lens system including the conversion adapter device of the present embodiment described above with reference to FIG. According to the conversion adapter device or the interchangeable lens system of the present embodiment, the user can mount the interchangeable lens 20 on the camera body 10 and shoot normally without being affected by the difference in the mount standard or the flange back standard. Is possible.

図２は、図１に示す変換アダプタの構成を示す図である。図２（Ａ）は変換アダプタ３０を交換レンズ側から見た図であり、主として変換アダプタ３０のレンズ側取り付け部３３を示す。図２（Ｂ）は変換アダプタ３０を側面から見た図である。図２（Ｃ）は変換アダプタ３０をカメラ本体側から見た図であり、主として変換アダプタ３０のカメラ本体側取り付け部３１を示す。図２（Ｃ）に示すように、カメラ本体側取り付け部３１には径方向外側に凸である爪部３５が３ヶ所設けられている。変換アダプタ３０を交換レンズ側から見て右回転させ、爪部３５を不図示のカメラ本体のマウント部の爪部に引っ掛けることで、カメラ本体１０との装着が可能となる。一方、図２（Ａ）に示すように、レンズ側取り付け部３３には径方向内側に凸である爪部３６が３ヶ所設けられている。交換レンズ２０を交換レンズ側から見て右回転させ、不図示の交換レンズのマウント部の爪部を、爪部３６に引っ掛けることで、交換レンズ２０との装着が可能となる。   FIG. 2 is a diagram showing a configuration of the conversion adapter shown in FIG. FIG. 2A is a view of the conversion adapter 30 as viewed from the interchangeable lens side, and mainly shows the lens side mounting portion 33 of the conversion adapter 30. FIG. 2B is a view of the conversion adapter 30 as viewed from the side. FIG. 2C is a view of the conversion adapter 30 as viewed from the camera body side, and mainly shows the camera body side attachment portion 31 of the conversion adapter 30. As shown in FIG. 2C, the camera body side attachment portion 31 is provided with three claw portions 35 that protrude outward in the radial direction. The conversion adapter 30 is rotated to the right when viewed from the interchangeable lens side, and the claw portion 35 is hooked on the claw portion of the mount portion of the camera body (not shown), so that the camera adapter 10 can be attached. On the other hand, as shown in FIG. 2A, the lens-side attachment portion 33 is provided with three claw portions 36 that protrude radially inward. When the interchangeable lens 20 is rotated to the right when viewed from the interchangeable lens side and the claw portion of the mount portion of the interchangeable lens (not shown) is hooked on the claw portion 36, the interchangeable lens 20 can be attached.

カメラ本体側取り付け部３１の大きさは、レンズ側取り付け部３３の大きさと比較して小さい。これは、カメラ本体側マウント部１１とレンズ側マウント部２１とでマウント規格が異なり、カメラ本体側マウント部１１の方が小さいためである。カメラ本体側取り付け部３１には、カメラ本体側通信接点群３２が光軸に対して上側（カメラ正位置状態において光軸に対して上側）に配置されている。カメラ本体側通信接点群３２は、略矩形の平面接点を有する通信接点３２０乃至３２９を有する。通信接点３２０乃至３２９は、カメラ本体１０のカメラ側通信接点群１２に含まれる通信接点に対応している。   The size of the camera body side attachment portion 31 is smaller than the size of the lens side attachment portion 33. This is because the camera body side mount unit 11 and the lens side mount unit 21 have different mount standards, and the camera body side mount unit 11 is smaller. In the camera main body side attaching portion 31, a camera main body side communication contact group 32 is arranged on the upper side with respect to the optical axis (upward with respect to the optical axis in the camera normal position state). The camera body side communication contact group 32 includes communication contacts 320 to 329 having substantially rectangular planar contacts. The communication contacts 320 to 329 correspond to communication contacts included in the camera side communication contact group 12 of the camera body 10.

カメラ本体側通信接点群３２に含まれる通信接点の役割を以下に示す。通信接点３２０は、レンズ駆動用電源接点である。通信接点３２１は、レンズ駆動用ＧＮＤ接点である。通信接点３２２乃至３２６は信号系接点である。具体的には、通信接点３２２はレンズ制御回路用電源接点、通信接点３２３はカメラからレンズへの信号接点である。通信接点３２４はレンズからカメラへの信号接点、通信接点３２５はカメラとレンズとの通信クロックを同期させるための接点、通信接点３２６はレンズ制御回路用ＧＮＤ接点である。通信接点３２７乃至３２９は、新しいタイプのカメラのマウント規格に対応した通信接点である。通信接点３２７乃至３２９は、上記の通信接点３２０、３２１とは異なる第二駆動電源系接点であり、通常のレンズ駆動とは異なる駆動をさせる場合に用いる。例えば、撮影レンズ２００内のフォーカスレンズをゆっくり動かして合焦スピードを遅くする動作やフォーカスレンズを高速で動かして合焦スピードを早くする動作などを行わせる場合に使用する。通信接点３２７は第二のレンズ駆動用電源接点、通信接点３２８は上述した特殊な動作ができるレンズが正しく装着されたか否かを確認する接点である。通信接点３２９は第二のレンズ駆動用ＧＮＤ接点である。   The role of the communication contacts included in the camera body side communication contact group 32 is shown below. The communication contact 320 is a lens driving power contact. The communication contact 321 is a lens driving GND contact. Communication contacts 322 to 326 are signal system contacts. Specifically, the communication contact 322 is a lens control circuit power supply contact, and the communication contact 323 is a signal contact from the camera to the lens. The communication contact 324 is a signal contact from the lens to the camera, the communication contact 325 is a contact for synchronizing the communication clock between the camera and the lens, and the communication contact 326 is a GND contact for the lens control circuit. The communication contacts 327 to 329 are communication contacts corresponding to a new type of camera mounting standard. The communication contacts 327 to 329 are second drive power supply system contacts different from the communication contacts 320 and 321 described above, and are used when driving different from normal lens driving. For example, it is used when an operation of slowly moving the focus lens in the photographing lens 200 to slow down the focusing speed or an operation of moving the focus lens at high speed to increase the focusing speed is performed. The communication contact 327 is a second power supply contact for driving the lens, and the communication contact 328 is a contact for confirming whether or not the lens capable of the special operation described above is correctly attached. The communication contact 329 is a second lens driving GND contact.

一方、図２（Ａ）、（Ｂ）に示すように、レンズ側取り付け部３３には、レンズ側通信接点群３４が光軸を挟んでカメラ本体側通信接点群３２と対向する位置（カメラ正位置状態において光軸に対して下側）に設けられている。すなわち、カメラ本体側通信接点群３２のカメラ光軸周りの位置と、レンズ側通信接点群３４のカメラ光軸周りの位置とが、互いに異なる。交換レンズ２０の通信接点群２２がカメラ正位置状態において光軸に対して下側に配置されているので、ユーザは通常のカメラへの交換レンズ装着作業と同様のやり方で、交換レンズ２０を変換アダプタ３０に装着することができる。   On the other hand, as shown in FIGS. 2A and 2B, the lens side communication contact group 34 is positioned on the lens side attachment portion 33 so as to face the camera body side communication contact group 32 with the optical axis in between (camera correct). It is provided on the lower side with respect to the optical axis in the position state. That is, the position of the camera body side communication contact group 32 around the camera optical axis is different from the position of the lens side communication contact group 34 around the camera optical axis. Since the communication contact group 22 of the interchangeable lens 20 is disposed below the optical axis in the camera normal position state, the user converts the interchangeable lens 20 in a manner similar to that for mounting the interchangeable lens on a normal camera. The adapter 30 can be attached.

レンズ側通信接点群３４は、略円柱状で、円形の接点面を有する通信接点３４０乃至３４７を備える。通信接点３４０乃至３４７は、各々、光軸方向に移動可能で、内部にてバネなどの弾性部材により支持されている。通信接点３４０乃至３４７はレンズの通信接点群２２に含まれる通信接点に対応している。レンズ側取り付け部３３からカメラ本体側取り付け部３１に向かって外力が加わると、通信接点３４０乃至３４７は、加わった外力に応じて移動し、無負荷状態になると元の位置に戻る。従って、交換レンズ２０が装着された場合に、通信接点３４０乃至３４７は、交換レンズ２０のレンズ側通信接点群２２に含まれる、対応する通信接点に対して、一定の反力をもって接することができる。その結果、接点間の瞬断を防ぎ、安定した通信を行うことができる。なお、通信接点３４０乃至３４７は、変換アダプタ３０に交換レンズ２０が装着された状態で交換レンズ２０の通信接点に対して所定の反力をもって接するように設けられていれば、通信接点３４０乃至３４７の移動方向は径方向であってもよい。また、通信接点３４０乃至３４７が、非可動であってもよい。   The lens side communication contact group 34 is substantially cylindrical and includes communication contacts 340 to 347 having circular contact surfaces. Each of the communication contacts 340 to 347 is movable in the optical axis direction and is supported inside by an elastic member such as a spring. Communication contacts 340 to 347 correspond to communication contacts included in the communication contact group 22 of the lens. When an external force is applied from the lens-side attachment portion 33 toward the camera body-side attachment portion 31, the communication contacts 340 to 347 move according to the applied external force, and return to the original position when no load is applied. Therefore, when the interchangeable lens 20 is attached, the communication contacts 340 to 347 can contact the corresponding communication contacts included in the lens side communication contact group 22 of the interchangeable lens 20 with a certain reaction force. . As a result, instantaneous disconnection between the contacts can be prevented and stable communication can be performed. If the communication contacts 340 to 347 are provided so as to contact the communication contact of the interchangeable lens 20 with a predetermined reaction force in a state where the interchangeable lens 20 is attached to the conversion adapter 30, the communication contacts 340 to 347 are provided. The moving direction may be the radial direction. Further, the communication contacts 340 to 347 may be non-movable.

通信接点３４０乃至３４７の役割を以下に示す。通信接点３４０乃至３４２は、駆動電源系接点である。具体的には、通信接点３４０は、レンズ駆動用電源接点、通信接点３４１はレンズ装着の有無を確認するための接点である。通信接点３４２はレンズ駆動用ＧＮＤ接点である。通信接点３４３乃至３４７は信号系接点である。具体的には、通信接点３４３はレンズ制御回路用電源接点、通信接点３４４はカメラからレンズへの信号接点、通信接点３４５はレンズからカメラへの信号接点である。また、通信接点３４６はカメラとレンズとの通信クロックを同期させるための接点、通信接点３４７はレンズ制御回路用ＧＮＤ接点である。   The role of the communication contacts 340 to 347 is shown below. Communication contacts 340 to 342 are drive power supply system contacts. Specifically, the communication contact 340 is a lens driving power contact, and the communication contact 341 is a contact for confirming whether or not a lens is mounted. The communication contact 342 is a lens driving GND contact. Communication contacts 343 to 347 are signal system contacts. Specifically, the communication contact 343 is a power supply contact for the lens control circuit, the communication contact 344 is a signal contact from the camera to the lens, and the communication contact 345 is a signal contact from the lens to the camera. The communication contact 346 is a contact for synchronizing the communication clock between the camera and the lens, and the communication contact 347 is a lens control circuit GND contact.

カメラ本体側通信接点群３２に含まれる通信接点（第１の通信接点）とレンズ側通信接点群３４に含まれる、上記第１の通信接点に対応する通信接点（第２の通信接点）とは、導通部材３０１によって電気的に接続されている。例えば、通信接点３２０が、対応する通信接点である通信接点３４０に接続され、通信接点３２１が、対応する通信接点である通信接点３４１および３４２に接続されている。また、通信接点３２２が、対応する通信接点である通信接点３４３に接続され、通信接点３２３が、対応する通信接点である通信接点３４４に接続されている。また、通信接点３２４が、対応する通信接点である通信接点３４５に接続され、通信接点３２５が、対応する通信接点である通信接点３４６に接続されている。また、通信接点３２６が、対応する通信接点である通信接点３４７に接続されている。なお、通信接点３２７乃至３２９に対応する通信接点は、レンズ側取り付け部３３には設けられていない。   What is a communication contact (first communication contact) included in the camera body side communication contact group 32 and a communication contact (second communication contact) corresponding to the first communication contact included in the lens side communication contact group 34? Are electrically connected by a conducting member 301. For example, the communication contact 320 is connected to a communication contact 340 that is a corresponding communication contact, and the communication contact 321 is connected to communication contacts 341 and 342 that are corresponding communication contacts. The communication contact 322 is connected to the communication contact 343 that is a corresponding communication contact, and the communication contact 323 is connected to the communication contact 344 that is a corresponding communication contact. Further, the communication contact 324 is connected to a communication contact 345 that is a corresponding communication contact, and the communication contact 325 is connected to a communication contact 346 that is a corresponding communication contact. The communication contact 326 is connected to a communication contact 347 that is a corresponding communication contact. Note that the communication contacts corresponding to the communication contacts 327 to 329 are not provided in the lens side mounting portion 33.

ここで、仮に、カメラ本体側通信接点群３２とレンズ側通信接点群３４とを、互いのカメラ光軸周りの位置が同一になるように配置（例えば、どちらの接点群もカメラ正位置状態において下側の位置に配置）する場合を想定する。この場合には、変換アダプタ３０の厚みが薄いことと、レンズ側通信接点群３４の光軸方向におけるレイアウトボリュームが大きいことに起因して、カメラ本体側通信接点群３２とレンズ側通信接点群３４が近接してしまう。その結果、カメラ本体側通信接点群３２とレンズ側通信接点群３４との配置レイアウトが困難となってしまう。また、仮にカメラ本体側通信接点群３２とレンズ側通信接点群３４とをレイアウトすることができたとしても、カメラ本体側通信接点群３２とレンズ側通信接点群３４とを接続する導通部材３０１が短くなってしまう。その結果、通信接点群の配置、導通部材３０１の配置、及び、通信接点群と導通部材３０１の組立作業性が悪くなる。   Here, it is assumed that the camera body side communication contact group 32 and the lens side communication contact group 34 are arranged so that their positions around the camera optical axis are the same (for example, both contact groups are in the camera normal position state). It is assumed that it is placed in the lower position. In this case, the camera body side communication contact group 32 and the lens side communication contact group 34 are attributed to the fact that the thickness of the conversion adapter 30 is thin and the layout volume in the optical axis direction of the lens side communication contact group 34 is large. Will be close. As a result, the layout of the camera body side communication contact group 32 and the lens side communication contact group 34 becomes difficult. Even if the camera body side communication contact group 32 and the lens side communication contact group 34 can be laid out, the conductive member 301 that connects the camera body side communication contact group 32 and the lens side communication contact group 34 is provided. It will be shorter. As a result, the arrangement of the communication contact group, the arrangement of the conducting member 301, and the assembly workability of the communication contact group and the conducting member 301 are deteriorated.

一方、本実施形態の変換アダプタ装置においては、カメラ本体側通信接点群３２のカメラ光軸周りの位置と、レンズ側通信接点群３４のカメラ光軸周りの位置とが互いに異なるように配置されている。具体的には、本実施形態の変換アダプタ装置においては、カメラ本体側通信接点群３２とレンズ側通信接点群３４とが光軸を挟んで対向するように配置されている。従って、本実施形態の変換アダプタ装置によれば、カメラ本体側通信接点群３２とレンズ側通信接点群３４との間に所定の距離の間隔をとることができる。その結果、カメラ本体側通信接点群３２とレンズ側通信接点群３４のレイアウトを改善させることができる。また、カメラ本体側通信接点群３２とレンズ側通信接点群３４とを導通する導通部材３０１のレイアウトや、カメラ本体側通信接点群３２とレンズ側通信接点群３４と導通部材３０１の組立作業性を向上させることができる。   On the other hand, in the conversion adapter device of the present embodiment, the position of the camera body side communication contact group 32 around the camera optical axis is different from the position of the lens side communication contact group 34 around the camera optical axis. Yes. Specifically, in the conversion adapter device of the present embodiment, the camera body side communication contact group 32 and the lens side communication contact group 34 are arranged so as to face each other across the optical axis. Therefore, according to the conversion adapter device of the present embodiment, a predetermined distance can be provided between the camera body side communication contact group 32 and the lens side communication contact group 34. As a result, the layout of the camera body side communication contact group 32 and the lens side communication contact group 34 can be improved. Further, the layout of the conductive member 301 that conducts the camera body side communication contact group 32 and the lens side communication contact group 34 and the assembly workability of the camera body side communication contact group 32, the lens side communication contact group 34 and the conduction member 301 are improved. Can be improved.

なお、本実施形態においては、通信接点３２７乃至３２９は第二駆動電源系接点であるが、通信接点３２７乃至３２９が、カメラ本体１０と交換レンズ２０との間で、従来より多くの情報を通信できるようにするための追加の信号系接点であってもよい。また、上記第二駆動電源系接点又は追加の信号系接点の数が、図２に示す通信接点３２７乃至３２９の数よりも多くても少なくてもよい。また、通信接点３２７乃至３２９の配置場所が、例えば、電源系接点と信号系接点の間であってもよい。また、カメラ本体側通信接点群３２が、通信接点３２７乃至３２９を備えない構成であってもよい。   In this embodiment, the communication contacts 327 to 329 are second drive power supply system contacts, but the communication contacts 327 to 329 communicate more information between the camera body 10 and the interchangeable lens 20 than in the past. It may be an additional signal system contact for enabling. Further, the number of the second drive power supply system contacts or the additional signal system contacts may be larger or smaller than the number of communication contacts 327 to 329 shown in FIG. Further, the communication contacts 327 to 329 may be arranged, for example, between the power system contact and the signal system contact. Further, the camera body side communication contact group 32 may be configured not to include the communication contacts 327 to 329.

本実施形態では、変換アダプタ３０のカメラ本体側通信接点群３２がカメラ正位置状態において光軸に対して上側、レンズ側通信接点群３４がカメラ正位置状態において光軸に対して下側に配置されているので、カメラ本体側にも以下のようなメリットがある。すなわち、新しいタイプのカメラは、電子ビューファインダーや表示部材、操作部材などがマウント上側に集中しており、電気実装系もマウント上側に集中して配置されている。従って、カメラ本体側通信接点群３２がカメラ正位置状態において光軸に対して上側に配置されていることによって、電気実装系のレイアウト効率がよくなる。   In the present embodiment, the camera body side communication contact group 32 of the conversion adapter 30 is arranged above the optical axis in the camera normal position, and the lens side communication contact group 34 is arranged below the optical axis in the camera normal position. Therefore, the camera body has the following advantages. That is, in a new type of camera, an electronic viewfinder, a display member, an operation member and the like are concentrated on the upper side of the mount, and an electric mounting system is also concentrated on the upper side of the mount. Accordingly, the layout efficiency of the electrical mounting system is improved by the camera body side communication contact group 32 being arranged above the optical axis in the camera normal position state.

図３は、本発明の第２の実施形態の変換アダプタ装置を備えるカメラ全体の概略構成例を示す図である。図３に示すカメラが備える構成部のうち、図１に示すカメラが備える構成部と同一の符号が付されたものは、図１に示すカメラが備える構成部と同様の機能を有する。図３に示すカメラは、カメラ本体１０と、交換レンズ２０と、カメラ本体１０と交換レンズとを接続する変換アダプタ４０とを備える。   FIG. 3 is a diagram illustrating a schematic configuration example of the entire camera including the conversion adapter device according to the second embodiment of the present invention. Among the components included in the camera illustrated in FIG. 3, components having the same reference numerals as those included in the camera illustrated in FIG. 1 have the same functions as the components included in the camera illustrated in FIG. 1. The camera shown in FIG. 3 includes a camera body 10, an interchangeable lens 20, and a conversion adapter 40 that connects the camera body 10 and the interchangeable lens.

変換アダプタ４０が図１に示す変換アダプタ３０と異なる点は、カメラ本体側取り付け部４１のカメラ本体側通信接点群４２が光軸に対して右側に配置されている点であり、その他の構成及び機能は、変換アダプタ３０が備える構成及び機能と同様である。すなわち、変換アダプタ４０が備えるカメラ本体側取り付け部４１は、図１に示すカメラ本体側取り付け部３１が有する機能と同様の機能を有する。また、カメラ本体側通信接点群４２は、図１に示すカメラ本体側通信接点群３２が有する機能と同様の機能を有する。また、レンズ側取り付け部４３は、図１に示すレンズ側取り付け部３３が有する機能と同様の機能を有する。また、レンズ側通信接点群４４は、図１に示すレンズ側通信接点群３４と同様の機能を有する。カメラ本体側取り付け部４１は、カメラ本体側の端面にカメラ本体側取り付け面４１ａを有する。カメラ本体側取り付け面４１ａは、図１に示すカメラ本体側取り付け面３１ａと同様の機能を有する。レンズ側取り付け部３３は、交換レンズ側の端面にレンズ側取り付け面４３ａを有する。レンズ側取り付け面４３ａは、図１に示すレンズ側取り付け面３３ａと同様の機能を有する。また、カメラ本体側通信接点群４２とレンズ側通信接点群４４とは、図１に示す導通部材３０１と同様の機能を有する導通部材４０１を介して電気的に接続されている。本実施形態の交換レンズシステムは、図３に示す変換アダプタ４０を備える交換レンズシステムとして実現することができる。   The conversion adapter 40 is different from the conversion adapter 30 shown in FIG. 1 in that the camera body side communication contact group 42 of the camera body side mounting portion 41 is arranged on the right side with respect to the optical axis. The function is the same as the configuration and function of the conversion adapter 30. That is, the camera main body side attaching portion 41 included in the conversion adapter 40 has the same function as that of the camera main body side attaching portion 31 shown in FIG. Further, the camera body side communication contact group 42 has the same function as that of the camera body side communication contact group 32 shown in FIG. Moreover, the lens side attaching part 43 has a function similar to the function which the lens side attaching part 33 shown in FIG. 1 has. The lens side communication contact group 44 has the same function as the lens side communication contact group 34 shown in FIG. The camera body-side mounting portion 41 has a camera body-side mounting surface 41a on the end surface on the camera body side. The camera body side mounting surface 41a has the same function as the camera body side mounting surface 31a shown in FIG. The lens-side attachment portion 33 has a lens-side attachment surface 43a on the end surface on the interchangeable lens side. The lens side attachment surface 43a has the same function as the lens side attachment surface 33a shown in FIG. Further, the camera body side communication contact group 42 and the lens side communication contact group 44 are electrically connected via a conducting member 401 having the same function as the conducting member 301 shown in FIG. The interchangeable lens system of the present embodiment can be realized as an interchangeable lens system including the conversion adapter 40 shown in FIG.

図４は、図３に示す変換アダプタの構成を示す図である。図４（Ａ）は変換アダプタ４０を交換レンズ側から見た図である。図４（Ｂ）は変換アダプタ４０を側面から見た図である。図４（Ｃ）は変換アダプタ４０をカメラ本体側から見た図である。図４（Ｃ）に示すカメラ本体側通信接点群４２が備える通信接点（通信接点４２０乃至４２９）の機能は、図２（Ｃ）に示すカメラ本体側通信接点群３２が備える通信接点（通信接点３２０乃至３２９）の機能と同様である。また、図４（Ａ）に示すレンズ側通信接点群４４が備える通信接点（通信接点４４０乃至４４７）の機能は、図２（Ｃ）に示すレンズ側通信接点群３４が備える通信接点（通信接点３４０乃至３４７）の機能と同様である。また、図４（Ａ）に示す爪部４６は、図２（Ａ）に示す爪部３６と同様の機能を有し、図４（Ｃ）に示す爪部４５は、図２（Ｃ）に示す爪部４５と同様の機能を有する。なお、カメラ本体１０が備えるカメラ側通信接点群１２も、カメラ本体１０が交換レンズ４０に装着された状態においてカメラ本体側通信接点群４２と接するように、カメラ正位置状態において光軸に対して右側に配置されている。   FIG. 4 is a diagram showing a configuration of the conversion adapter shown in FIG. FIG. 4A is a view of the conversion adapter 40 as viewed from the interchangeable lens side. FIG. 4B is a view of the conversion adapter 40 as viewed from the side. FIG. 4C is a view of the conversion adapter 40 as viewed from the camera body side. The functions of the communication contacts (communication contacts 420 to 429) included in the camera body side communication contact group 42 shown in FIG. 4C are the same as the communication contacts (communication contacts) included in the camera body side communication contact group 32 shown in FIG. 320 to 329). Further, the functions of the communication contacts (communication contacts 440 to 447) included in the lens side communication contact group 44 shown in FIG. 4A are the same as the communication contacts (communication contacts) included in the lens side communication contact group 34 shown in FIG. 340 to 347). 4A has the same function as the claw portion 36 shown in FIG. 2A, and the claw portion 45 shown in FIG. It has the same function as the claw portion 45 shown. The camera-side communication contact group 12 included in the camera body 10 is also in relation to the optical axis in the camera normal position so that the camera body-side communication contact group 42 contacts the camera body-side communication contact group 42 when the camera body 10 is attached to the interchangeable lens 40. Located on the right side.

本発明の第２の実施形態においては、図４（Ｃ）に示すように、変換アダプタ４０のカメラ本体側通信接点群４２が光軸に対して右側（カメラ正位置状態において撮影者側から見て光軸に対して右側）に配置されている。また、図４（Ａ）に示すように、変換アダプタ４０のレンズ側通信接点群４４が、光軸に対して下側（カメラ正位置状態において光軸に対して下側）に配置されている。すなわち、カメラ本体側通信接点群４２とレンズ側通信接点群４４とが、カメラ光軸周りに９０度離れた位置（図４に示す例では、光軸を中心とした円の周方向に略１/ ４回転ずれた位置）に設けられている。従って、変換アダプタ４０によれば、カメラ本体側通信接点群４２とレンズ側通信接点群４４との間に所定の距離の間隔をとることができる。その結果、カメラ本体側通信接点群４２とレンズ側通信接点群４４のレイアウトを改善させることができる。また、カメラ本体側通信接点群４２とレンズ側通信接点群４４とを導通する導通部材４０１のレイアウトや、カメラ本体側通信接点群４２とレンズ側通信接点群４４と導通部材４０１の組立作業性を向上させることができる。   In the second embodiment of the present invention, as shown in FIG. 4C, the camera body side communication contact group 42 of the conversion adapter 40 is on the right side of the optical axis (viewed from the photographer side in the camera normal position state). The right side of the optical axis. Further, as shown in FIG. 4A, the lens side communication contact group 44 of the conversion adapter 40 is disposed on the lower side with respect to the optical axis (lower side with respect to the optical axis in the camera normal position state). . That is, the camera main body side communication contact group 42 and the lens side communication contact group 44 are positioned 90 degrees apart about the camera optical axis (in the example shown in FIG. 4, approximately 1 in the circumferential direction of the circle centered on the optical axis). / Position shifted by 4 rotations). Therefore, according to the conversion adapter 40, a predetermined distance can be provided between the camera body side communication contact group 42 and the lens side communication contact group 44. As a result, the layout of the camera body side communication contact group 42 and the lens side communication contact group 44 can be improved. Further, the layout of the conductive member 401 that conducts the camera body side communication contact group 42 and the lens side communication contact group 44, and the assembly workability of the camera body side communication contact group 42, the lens side communication contact group 44, and the conduction member 401 are improved. Can be improved.

また、カメラ本体１０が、電源であるバッテリーが光軸に対して右側にあるグリップ内に配置されている新しいタイプのカメラに対応するカメラ本体である場合には、以下のようなメリットがある。すなわち、本発明の第２の実施形態のように、カメラ本体１０のカメラ側通信接点群１２を光軸に対して右側に配置することによって、カメラ側通信接点群１２が電源の近傍の位置に配置されることになり、電気実装系のレイアウト効率がよくなる。   Further, when the camera body 10 is a camera body corresponding to a new type of camera in which a battery as a power source is disposed in a grip on the right side with respect to the optical axis, there are the following merits. That is, as in the second embodiment of the present invention, the camera-side communication contact group 12 of the camera body 10 is arranged on the right side with respect to the optical axis, so that the camera-side communication contact group 12 is positioned near the power source. As a result, the layout efficiency of the electrical mounting system is improved.

以上、本発明をその好適な実施形態に基づいて詳述してきたが、本発明はこれら特定の実施形態に限られるものではなく、本発明の要旨を逸脱しない範囲の様々な形態も本発明に含まれる。上述の実施形態の一部を適宜組み合わせてもよい。例えば、本発明の変換アダプタ装置が備えるカメラ本体側通信接点群とレンズ側通信接点群との間が設けられる位置は、両者の間に所定の距離の間隔をとることができる位置であればよい。すなわち、変換アダプタ装置が備えるカメラ本体側通信接点群とレンズ側通信接点群とを、カメラ光軸周りに任意の角度離れた位置に設けてもよい。   Although the present invention has been described in detail based on preferred embodiments thereof, the present invention is not limited to these specific embodiments, and various forms within the scope of the present invention are also included in the present invention. included. A part of the above-described embodiments may be appropriately combined. For example, the position provided between the camera body side communication contact group and the lens side communication contact group included in the conversion adapter device of the present invention may be a position where a predetermined distance can be provided between them. . That is, the camera main body side communication contact group and the lens side communication contact group provided in the conversion adapter device may be provided at positions separated by an arbitrary angle around the camera optical axis.

また、本実施形態では、カメラ本体のマウント規格と交換レンズのマウント規格とがマウントの大きさも含めて異なる例を示したが、両者のマウントの大きさが同じであってもよい。その場合、変換アダプタのカメラ本体側取り付け部とレンズ側取り付け部の大きさが同じとなるだけであり、通信接点群の配置に関して、本発明の要旨を逸脱するものではない。   Further, in the present embodiment, an example in which the mount standard of the camera body and the mount standard of the interchangeable lens including the size of the mount is shown, but the size of both mounts may be the same. In that case, only the size of the camera body side attachment portion and the lens side attachment portion of the conversion adapter is the same, and the arrangement of the communication contact group does not depart from the gist of the present invention.

（その他の実施例）
また、本発明は、以下の処理を実行することによっても実現される。即ち、上述した実施形態の機能を実現するソフトウェア（プログラム）を、ネットワーク又は各種記憶媒体を介してシステム或いは装置に供給し、そのシステム或いは装置のコンピュータ（またはＣＰＵやＭＰＵ等）がプログラムを読み出して実行する処理である。この場合、そのプログラム、及び該プログラムを記憶した記憶媒体は本発明を構成することになる。 (Other examples)
The present invention can also be realized by executing the following processing. That is, software (program) that realizes the functions of the above-described embodiments is supplied to a system or apparatus via a network or various storage media, and a computer (or CPU, MPU, or the like) of the system or apparatus reads the program. It is a process to be executed. In this case, the program and the storage medium storing the program constitute the present invention.

１０ カメラ本体
２０ 交換レンズ
３０ 変換アダプタ 10 Camera body 20 Interchangeable lens 30 Conversion adapter

Claims (11)

カメラ本体と交換レンズとを接続する変換アダプタ装置であって、
前記カメラ本体に装着可能に設けられたカメラ本体側取り付け部と、
前記交換レンズに装着可能に設けられたレンズ側取り付け部と、
前記カメラ本体側取り付け部に軸周りに設けられ、前記カメラ本体の通信接点群と接する第１の通信接点群と、
前記レンズ側取り付け部に前記軸周りに設けられ、前記交換レンズの通信接点群と接する第２の通信接点群と、
前記第１の通信接点群と前記第２の通信接点群とを電気的に接続する導通部材とを備え、
前記第１の通信接点群は前記第２の通信接点群にない接点を前記第１の通信接点群の端に設けることで前記第２の通信接点群に含まれる接点の数よりも前記第１の通信接点群に含まれる接点の数が多く、かつ前記第１の通信接点群の前記軸からの距離は、前記第２の通信接点群の前記軸からの距離よりも短いことを特徴とする変換アダプタ装置。 A conversion adapter device for connecting a camera body and an interchangeable lens,
A camera body side mounting portion provided so as to be attachable to the camera body;
A lens side mounting portion provided so as to be attachable to the interchangeable lens;
A first communication contact group provided around the axis of the camera body-side mounting portion and in contact with the communication contact group of the camera body;
A second communication contact group provided around the axis in the lens side mounting portion and in contact with the communication contact group of the interchangeable lens;
A conductive member that electrically connects the first communication contact group and the second communication contact group;
The first communication contact group is provided with a contact that is not in the second communication contact group at an end of the first communication contact group, so that the first communication contact group includes the first communication contact group rather than the number of contacts included in the second communication contact group . The number of contacts included in the communication contact group is large, and the distance of the first communication contact group from the axis is shorter than the distance of the second communication contact group from the axis. Conversion adapter device. 前記第１の通信接点群と前記第２の通信接点群とが、前記軸を挟んで対向する位置に設けられていることを特徴とする請求項１に記載の変換アダプタ装置。   2. The conversion adapter device according to claim 1, wherein the first communication contact group and the second communication contact group are provided at positions facing each other across the shaft. 前記第１の通信接点群が、カメラ正位置状態において、前記軸に対して上側に設けられていることを特徴とする請求項２に記載の変換アダプタ装置。   The conversion adapter device according to claim 2, wherein the first communication contact group is provided on the upper side with respect to the axis in a camera normal position state. 前記第１の通信接点群と前記第２の通信接点群とが、前記軸周りに９０度離れた位置に設けられていることを特徴とする請求項１に記載の変換アダプタ装置。   2. The conversion adapter device according to claim 1, wherein the first communication contact group and the second communication contact group are provided at positions 90 degrees apart about the axis. 前記第１の通信接点群と接する前記カメラ本体の通信接点群が、カメラの電源の近傍の位置に設けられていることを特徴とする請求項４に記載の変換アダプタ装置。   The conversion adapter device according to claim 4, wherein a communication contact group of the camera body that is in contact with the first communication contact group is provided at a position near a power source of the camera. 前記第２の通信接点群が、前記変換アダプタ装置に前記交換レンズが装着された状態で前記交換レンズの通信接点に対して所定の反力をもって接するように設けられていることを特徴とする請求項１乃至５のいずれかに記載の変換アダプタ装置。   The second communication contact group is provided to contact the communication contact of the interchangeable lens with a predetermined reaction force in a state where the interchangeable lens is mounted on the conversion adapter device. Item 6. The conversion adapter device according to any one of Items 1 to 5. 前記カメラ本体のフランジバックが前記交換レンズのフランジバックより短く、前記変換アダプタ装置の厚みが、該カメラ本体のフランジバックと該交換レンズのフランジバックとの差であることを特徴とする請求項１乃至６のいずれかに記載の変換アダプタ装置。   2. The flange back of the camera body is shorter than the flange back of the interchangeable lens, and the thickness of the conversion adapter device is a difference between the flange back of the camera body and the flange back of the interchangeable lens. The conversion adapter apparatus in any one of thru | or 6. 前記軸は、少なくとも自装置の中心軸またはカメラ光軸であることを特徴とする請求項1乃至７のいずれかに記載の変換アダプタ装置。   8. The conversion adapter apparatus according to claim 1, wherein the axis is at least a central axis of the own apparatus or a camera optical axis. 前記第１の通信接点群は、少なくともレンズ駆動系の接点と、前記レンズ駆動系と異なる駆動系の第二駆動系の接点とを含むことを特徴とする請求項１乃至８のいずれかに記載の変換アダプタ装置。   9. The first communication contact group includes at least a contact of a lens drive system and a contact of a second drive system of a drive system different from the lens drive system. Conversion adapter device. 前記第二駆動系の接点は、前記第１の通信接点群の端に設けられることを特徴とする請求項９に記載の変換アダプタ装置。The conversion adapter device according to claim 9, wherein the contact of the second drive system is provided at an end of the first communication contact group. カメラ本体と交換レンズとを接続する変換アダプタ装置を備える交換レンズシステムであって、
前記変換アダプタ装置が、
前記カメラ本体に装着可能に設けられたカメラ本体側取り付け部と、
前記交換レンズに装着可能に設けられたレンズ側取り付け部と、
前記カメラ本体側取り付け部に軸周りに設けられ、前記カメラ本体の通信接点群と接する第１の通信接点群と、
前記レンズ側取り付け部に前記軸周りに設けられ、前記交換レンズの通信接点群と接する第２の通信接点群と、
前記第１の通信接点群と前記第２の通信接点群とを電気的に接続する導通部材とを備え、
前記第１の通信接点群は前記第２の通信接点群にない接点を前記第１の通信接点群の端に設けることで前記第２の通信接点群に含まれる接点の数よりも前記第１の通信接点群に含まれる接点の数が多く、かつ前記第１の通信接点群の前記軸からの距離は、前記第２の通信接点群の前記軸からの距離よりも短いことを特徴とする交換レンズシステム。 An interchangeable lens system comprising a conversion adapter device for connecting a camera body and an interchangeable lens,
The conversion adapter device is
A camera body side mounting portion provided so as to be attachable to the camera body;
A lens side mounting portion provided so as to be attachable to the interchangeable lens;
A first communication contact group provided around the axis of the camera body-side mounting portion and in contact with the communication contact group of the camera body;
A second communication contact group provided around the axis in the lens side mounting portion and in contact with the communication contact group of the interchangeable lens;
A conductive member that electrically connects the first communication contact group and the second communication contact group;
The first communication contact group is provided with a contact that is not in the second communication contact group at an end of the first communication contact group, so that the first communication contact group includes the first communication contact group rather than the number of contacts included in the second communication contact group . The number of contacts included in the communication contact group is large, and the distance of the first communication contact group from the axis is shorter than the distance of the second communication contact group from the axis. Interchangeable lens system.
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