JP4474253B2

JP4474253B2 - camera

Info

Publication number: JP4474253B2
Application number: JP2004281582A
Authority: JP
Inventors: 龍一永柄
Original assignee: Canon Inc
Current assignee: Canon Inc
Priority date: 2004-09-28
Filing date: 2004-09-28
Publication date: 2010-06-02
Anticipated expiration: 2024-09-28
Also published as: JP2006098486A

Description

本発明は、撮影レンズを覆う位置と覆わない位置とにレンズバリアを開閉するカメラに関するものである。 The present invention relates to a camera for opening and closing position and the lens barrier does not cover a position covering the shooting lens.

従来、カメラに備えられる撮影レンズに不意に傷を付けたり、ユーザが撮影レンズを汚したりしてしまうことなどを防ぐために、カメラの電源がＯＦＦの時に撮影レンズを覆い、カメラの電源がＯＮの時に開放することによってカメラを撮影可能にするレンズバリア装置が種々提案されている。 Conventionally, scratched or suddenly taking lens provided in the camera, in order to prevent such a user ends up or fouling the photographing lens, the power of the camera covers the photographing lens when OFF, the power source of the camera is ON Various lens barrier devices have been proposed that can be photographed by opening the camera at the time.

図９に従来のレンズバリア装置を示す。３０はバリア部材であり、３０ａはバリア部材３０の回転中心である。そして、バリア部材３０には、バリア駆動部材３１に係合するピン３０ｂが設けられている。なお、ピン３０ｂを説明するため、図９ではバリア部材３０の一部切り欠いた状態を示している。また、３１はバリア部材３０を駆動するための駆動部材であり、バリア部材３０に係合する溝部３１ａが設けられている。３２は撮影レンズの光軸中心である。 FIG. 9 shows a conventional lens barrier device. Reference numeral 30 denotes a barrier member, and reference numeral 30 a denotes a rotation center of the barrier member 30. The barrier member 30 is provided with a pin 30 b that engages with the barrier driving member 31. In order to explain the pin 30b, FIG. 9 shows a state in which the barrier member 30 is partially cut away. Reference numeral 31 denotes a drive member for driving the barrier member 30, and a groove 31 a that engages with the barrier member 30 is provided. Reference numeral 32 denotes the optical axis center of the photographing lens.

そして、バリア駆動部材３１がＪ方向に回転すると、バリア部材３０のピン３０ｂがバリア駆動部材３１の溝部３１ａによって押され、バリア部材３０がＩ方向に回転する。 When the barrier driving member 31 rotates in the J direction, the pin 30b of the barrier member 30 is pushed by the groove 31a of the barrier driving member 31, and the barrier member 30 rotates in the I direction.

また、特許文献１では、バリア駆動部材とバリア部材の駆動アームとが直接接するように構成し、駆動アームの力の作用点をバリア部材に近くなるようして、薄型でかつ安定した動作を実現している。
特開２００４−１２５６７（段落０００８〜００１１、図１、図４等） Also, in Patent Document 1, the barrier drive member and the drive arm of the barrier member are configured to be in direct contact with each other, and the operation point of the force of the drive arm is close to the barrier member, thereby realizing a thin and stable operation. is doing.
JP-A-2004-12567 (paragraphs 0008 to 0011, FIG. 1, FIG. 4, etc.)

しかしながら、一般にレンズバリア装置は、レンズ鏡筒の直進動作を光路遮光部材であるバリア部材の回転動作に変換することで、バリア部材を動作させている。つまり、この回転動作への変換効率が低下したり、また、バリア部材の動作が不安定となると、バリア部材の閉じ位置が安定せず、バリア部材が撮影レンズを適切に覆うことができなくなってしまう。 However, in general, the lens barrier device operates the barrier member by converting the straight movement of the lens barrel into the rotation of the barrier member that is an optical path light blocking member. That, or reduces the conversion efficiency to the rotating operation and, when the operation of the barrier member becomes unstable, closed position is not stable in the barrier member, the barrier member is no longer able to properly cover the photographing lens End up.

さらには、バリア部材はカメラの外観面を形成するため、バリア部材の閉じ位置が不安定であるとカメラの品位（外観）を損なうことになる。 Furthermore, since the barrier member forms the appearance surface of the camera, if the closing position of the barrier member is unstable, the quality (appearance) of the camera is impaired.

具体的には、図９に示すようにバリア部材３０の回転中心３０ａを構成する部材（例えばレンズ鏡筒やバリア仕切り板）とバリア駆動部材３１とが偏芯する場合、例えば、バリア駆動部材３１がＨ方向に偏芯した場合、バリア部材３０の左右の回転角度が異なってしまう。このため、バリア部材３０の中心部に隙間ができ、閉じきらない状態となる。 Specifically, as shown in FIG. 9, when a member (for example, a lens barrel or a barrier partition plate) constituting the rotation center 30a of the barrier member 30 and the barrier driving member 31 are eccentric, for example, the barrier driving member 31 Is eccentric in the H direction, the left and right rotation angles of the barrier member 30 are different. For this reason, a gap is formed in the central portion of the barrier member 30 and the barrier member 30 is not fully closed.

また、特許文献１には図示されていないが、レンズ鏡筒の機構に対してバリア機構をさらに組み立てるため、各々の機構には組み立て時に必要なガタをもつ。ガタがあるとレンズ鏡筒機構の直線運動をバリア機構の回転動作に変換する際の変換効率が低下し、バリア駆動部材の所望の回転角を得ることができなくなる。このため、バリア部材が適切に回転できなくなるため、最終的にはバリア部材の閉じ位置が不安定になってしまう。 Although not shown in Patent Document 1, in order to further assemble the barrier mechanism with respect to the lens barrel mechanism, each mechanism has a backlash necessary for assembly. If there is a backlash, the conversion efficiency when converting the linear motion of the lens barrel mechanism into the rotation operation of the barrier mechanism is reduced, and a desired rotation angle of the barrier drive member cannot be obtained. For this reason, the barrier member cannot be properly rotated, and eventually the closing position of the barrier member becomes unstable.

また、レンズバリア装置は撮影レンズの前面に取り付けられるものであるため、組み立て時の撮影レンズの損傷を防ぐためにも簡単な構成で組み立て可能な構造が必要とされる。 Further, since the lens barrier device is intended to be attached to the front of the taking lens, is assemblable structure with a simple structure in order to prevent damage during assembly of the taking lens is needed.

本発明の例示的な目的の１つは、簡略化された構造で、かつ安定したレンズバリアの動作が可能なカメラを実現することにある。 An exemplary object of the present invention is to realize a camera having a simplified structure and capable of stable lens barrier operation.

本発明に係るカメラは、第１のカム部を有するベース部材と、レンズ鏡筒を構成するレンズ保持部材と、前記レンズ保持部材に対して回動可能に保持され、この回動によってレンズの光路を遮光可能なバリア部材と、前記レンズ保持部材に対して回転することにより前記バリア部材を回動させる駆動部材と、前記駆動部材との間に付勢部材が設けられた部材であって、前記レンズ保持部材の移動に応じて前記第１のカム部と接して回転力を伝達する第２のカム部を有していて当該回転力により前記駆動部材を回転させる差動部材とを備え、前記差動部材と前記駆動部材とは、互いに有する係合部により係合して前記付勢部材により付勢することでガタを持ってユニット化される部材であって、当該ユニット化された前記差動部材及び前記駆動部材を前記レンズ保持部材に組み付けることによって、前記レンズ保持部材に対して前記差動部材及び前記駆動部材が位置決めされていることを特徴とする。
The camera according to the present invention includes a base member having a first cam portion, a lens holding member constituting a lens barrel, and a lens holding member which is rotatably supported by the rotation. and a barrier member capable shading, and a drive member for rotating said barrier member by rotating with respect to the lens holding member, a member urging member provided between the driving member, wherein A differential member that has a second cam portion that contacts the first cam portion according to the movement of the lens holding member and transmits a rotational force, and rotates the drive member by the rotational force; The differential member and the drive member are members that are united with a backlash by being engaged with each other by engaging portions and being biased by the biasing member, Moving member and the drive By assembling the timber to the lens holding member, the differential member and the drive member relative to said lens holding member, characterized in that it is positioned.

本発明によれば、簡略化された構成で、かつバリア部材の位置精度が向上し、バリア部材の安定した動作を実現することができる。
According to the present invention, the position accuracy of the barrier member is improved with a simplified configuration, and a stable operation of the barrier member can be realized.

以下に本発明の実施例について説明する。 Examples of the present invention will be described below.

図１は本発明の実施例１におけるカメラの外観斜視図である。１はカメラ本体で、このカメラ本体１の前面には撮影レンズの焦点距離が変更可能なレンズ鏡筒ユニット２、被写体に照明光を照射するストロボ装置を構成する発光窓部４、発光窓部４の左側にファインダ窓５が設けられている。そして、レンズ鏡筒ユニット２の前面にカメラの電源ＯＮ・ＯＦＦに従って撮影レンズの前面（被写体側）を開閉するレンズバリア装置３が備えられている。 FIG. 1 is an external perspective view of a camera in Embodiment 1 of the present invention. Reference numeral 1 denotes a camera body. A front surface of the camera body 1 has a lens barrel unit 2 capable of changing a focal length of a photographic lens, a light emission window portion 4 constituting a strobe device for irradiating a subject with illumination light, and a light emission window portion 4. A finder window 5 is provided on the left side. A lens barrier device 3 is provided on the front surface of the lens barrel unit 2 to open and close the front surface (subject side) of the photographing lens in accordance with the power ON / OFF of the camera.

また、カメラ本体１の上面には撮影準備動作（焦点調節動作および測光動作）及び撮影動作（フィルムやＣＭＯＳセンサ、ＣＣＤセンサ等の撮像素子１０ｂへの露光）を開始させるためのレリーズボタン６が設けられている。 Further, a release button 6 is provided on the upper surface of the camera body 1 for starting a shooting preparation operation (focus adjustment operation and photometry operation) and a shooting operation (exposure to the image sensor 10b such as a film, a CMOS sensor, or a CCD sensor). It has been.

図２はレンズ鏡筒ユニット２を繰り出した状態でのカメラの断面図である。７は第１レンズユニット７０を保持し、レンズ鏡筒ユニット２の外観面を形成するレンズ保持部材（第１の部材）であり、８はシャッターユニットと第２レンズユニット８０を保持する第１レンズ保持枠、９は第３レンズユニット９０を保持する第２レンズ保持枠である。これら第１、第２、第３の各レンズユニットによって撮影レンズが構成されている。１０は撮像素子１０ｂが設けられるベース部材である。そして、レンズ保持部材７の前面部にはレンズバリア装置３が備えられている。 FIG. 2 is a sectional view of the camera with the lens barrel unit 2 extended. Reference numeral 7 denotes a lens holding member (first member) that holds the first lens unit 70 and forms the external surface of the lens barrel unit 2, and 8 denotes a first label that holds the shutter unit and the second lens unit 80. lens holding frame 9 is second lenses holding frame that holds the third lens unit 90. These first, second and third lens units constitute a photographic lens. Reference numeral 10 denotes a base member on which the image sensor 10b is provided. A lens barrier device 3 is provided on the front surface of the lens holding member 7.

また、１１はレンズ保持部材７（第１レンズユニット７０）をレンズ鏡筒ユニット２の駆動時に直進規制するための直進筒、１２は内部にレンズ保持部材７（第１レンズユニット７０）及び第１レンズ保持枠８を駆動するためのカムを備えた移動カム環であり、レンズ保持部材７に設けられたカムピン７ｂが移動カム環１２のカム溝部に係合している。１３は移動カム環１２を駆動するめのカムを備えた固定筒である。なお、レンズ鏡筒ユニット２の構成及び駆動方法は従来から公知の技術であり、詳しい説明は省略するが上記の構成に限定されるものではない。 Reference numeral 11 denotes a rectilinear cylinder for restricting the lens holding member 7 (first lens unit 70) from moving straight when the lens barrel unit 2 is driven. Reference numeral 12 denotes an internal lens holding member 7 (first lens unit 70) and a first lens. A moving cam ring provided with a cam for driving the lens holding frame 8, and a cam pin 7 b provided on the lens holding member 7 is engaged with a cam groove portion of the moving cam ring 12. Reference numeral 13 denotes a fixed cylinder provided with a cam for driving the movable cam ring 12. The configuration and driving method of the lens barrel unit 2 are conventionally known techniques, and detailed description is omitted, but is not limited to the above configuration.

図３、図４は本実施例におけるカメラのバリア機構の展開斜視図である。図３において、１４はレンズ鏡筒ユニット２の外観面を形成する外観カバー、１５は外観カバー１４と共にレンズ鏡筒ユニット２の前面を覆い、カメラの外観面を形成するバリアカバーである。図３及び図４において、１６は電源ＯＮ・ＯＦＦの動作（レンズ鏡筒ユニット２の動作）に従って撮影レンズ（第１レンズユニット７０）の前面を開閉するバリア部材であり、後述する駆動部材１８と係合するピン部１６ａを備えている。また、バリア部材１６の回転中心はレンズ保持部材７に対して基準軸７ｃの位置に設けられている。このためバリア部材１６はレンズ保持部材７の基準軸（回転中心）７ｃに取り付けられ、これを中心に回転する。 3 and 4 are developed perspective views of the barrier mechanism of the camera in this embodiment. In FIG. 3, 14 is an external cover that forms the external surface of the lens barrel unit 2, and 15 is a barrier cover that covers the front surface of the lens barrel unit 2 together with the external cover 14 and forms the external surface of the camera. 3 and 4, reference numeral 16 denotes a barrier member that opens and closes the front surface of the photographing lens (first lens unit 70) in accordance with the power ON / OFF operation (operation of the lens barrel unit 2). An engaging pin portion 16a is provided. The center of rotation of the barrier member 16 is provided at the position of the reference axis 7 c with respect to the lens holding member 7. For this reason, the barrier member 16 is attached to the reference axis (rotation center) 7c of the lens holding member 7 and rotates around this.

１７はバリア部材１６が撮影レンズ（第１レンズユニット７０）に触れないように光軸方向の位置を規制するバリア仕切り板、１８はバリア仕切り板１７よりも結像面側に配置され、バリア部材１６を駆動する駆動部材（第２の部材）である。駆動部材１８にはバリア部材１６（ピン部１６ａ）を駆動するためのＵ字型の溝部１８ａが備えられている。 Reference numeral 17 denotes a barrier partition plate that regulates the position in the optical axis direction so that the barrier member 16 does not touch the photographing lens (first lens unit 70) , and 18 is arranged closer to the image plane than the barrier partition plate 17 , and the barrier member 16 is a drive member (second member) for driving 16. The drive member 18 is provided with a U-shaped groove portion 18a for driving the barrier member 16 (pin portion 16a) .

また、１９はレンズ保持部材７の動作を回転運動に変換する差動部材（第３の部材）であり、ベース部材１０に備えられるカム部１０ａと当接するカム部１９ａが設けられている。駆動部材１８と差動部材１９間には駆動部材１８を回転方向Ａに付勢する付勢ばね２０が設けられており、レンズ保持部材７と差動部材１９間にはＢ方向に差動部材１９をレンズ保持部材７に対して常に付勢するように付勢ばね２１が設けられている。このように、付勢ばね２０によって駆動部材１８と差動部材１９は一体で回転することが可能となる。また、付勢ばね２１は、バリア部材１６を開き方向へ付勢するためのばねである。 Further, 19 is a differential member that converts operation of the lens holding member 7 to the rotary motion (third member), a cam portion 19a which abuts against the cam portion 10a provided on the base member 10 is provided. A biasing spring 20 that biases the driving member 18 in the rotation direction A is provided between the driving member 18 and the differential member 19, and the differential member in the B direction is provided between the lens holding member 7 and the differential member 19. A biasing spring 21 is provided so as to always bias 19 to the lens holding member 7. In this way, the driving member 18 and the differential member 19 can be rotated together by the biasing spring 20. The urging spring 21 is a spring for urging the barrier member 16 in the opening direction.

次に、本実施例におけるカメラのバリア機構とレンズ保持部材７との動作について図５及び図６を用いて説明する。図５にはベース部材１０、バリア部材１６、駆動部材１８、差動部材１９、付勢ばね２１を示しており、カメラの電源ＯＦＦ時の状態である。 Next, the operation of the camera barrier mechanism and the lens holding member 7 in this embodiment will be described with reference to FIGS. FIG. 5 shows the base member 10, the barrier member 16, the driving member 18, the differential member 19, and the biasing spring 21, which is in a state when the camera is turned off.

図５においてカメラの電源がＯＮされると、レンズ鏡筒ユニット２は光軸方向Ｃに繰り出す。そして、レンズ鏡筒ユニット２が繰り出すことにより、差動部材１９のカム部１９ａがベース部材１０のカム部１０ａから離れる方向（光軸方向）に移動するとともに、付勢ばね２１の開き力によって差動部材１９は図中Ｂ方向に回転する。差動部材１９と駆動部材１８は付勢ばね２０によって一体に回転するため駆動部材１８も図中Ｂ方向に回転する。 In FIG. 5, when the camera is turned on, the lens barrel unit 2 extends in the optical axis direction C. By the lens barrel unit 2 is fed out, together with the cam portion 19a of the differential member 19 is moved in the direction (optical axis direction) away from the cam portion 10a of the base member 10, the difference by the opening force of the biasing spring 21 The moving member 19 rotates in the direction B in the drawing. Since the differential member 19 and the drive member 18 are integrally rotated by the biasing spring 20, the drive member 18 is also rotated in the direction B in the drawing.

次にバリア部材１６と駆動部材１８との関係を説明する。なお、図６において、バリア部材１６のピン部１６ａと駆動部材１８のＵ字型溝部１８ａを説明するために、バリア部材１６の一部を切り欠いて図示している。 Next, the relationship between the barrier member 16 and the drive member 18 will be described. In FIG. 6, in order to explain the pin portion 16a of the barrier member 16 and the U-shaped groove portion 18a of the drive member 18, a part of the barrier member 16 is cut away.

図６（ａ）はカメラの電源ＯＦＦ時の図であり、図５と同一の状態である。上述のように差動部材１９が図中Ｂ方向に回転する時、駆動部材１８も図中Ｂ方向に回転する。駆動部材１８の回転に伴うＵ字型溝部１８ａの移動によって、バリア部材１６はＵ字型溝部１８ａと係合するピン部１６ａを介して駆動部材１８の回転力を受けて図中Ｄ方向に回転する。レンズ鏡筒ユニット２の繰り出しが終わるとバリア部材１６と駆動部材１８は図６（ｂ）の状態になり、バリア部材１６の開き動作が終了してカメラが撮影可能状態となる。 FIG. 6A is a diagram when the camera is turned off, which is the same state as FIG. As described above, when the differential member 19 rotates in the direction B in the figure, the drive member 18 also rotates in the direction B in the figure. Due to the movement of the U-shaped groove 18a accompanying the rotation of the drive member 18 , the barrier member 16 receives the rotational force of the drive member 18 through the pin portion 16a engaged with the U -shaped groove 18a and rotates in the direction D in the figure. To do. When the feeding of the lens barrel unit 2 is finished, the barrier member 16 and the driving member 18 are in the state shown in FIG. 6B, and the opening operation of the barrier member 16 is finished, so that the camera can be photographed.

また、カメラの電源ＯＦＦ時には、バリア部材１６は閉じ方向に、すなわち上記開き方向の動作とは逆方向の動作をする。具体的には、レンズ保持部材７（第１レンズユニット７０）がワイド端のとき、差動部材１９はカムによって回動するが、駆動部材１８は回転せず、レンズ保持部材７が沈胴したときに初めて差動部材１９と駆動部材１８が一体となって回転してバリア部材１６が閉じ方向に動作する。 When the camera is turned off, the barrier member 16 moves in the closing direction, that is, in the direction opposite to the opening direction. Specifically, when the lens holding member 7 (first lens unit 70) is at the wide end, the differential member 19 is rotated by the cam, but the drive member 18 does not rotate and the lens holding member 7 is retracted. For the first time, the differential member 19 and the drive member 18 rotate together to move the barrier member 16 in the closing direction.

次に、差動部材１９と駆動部材１８の組み立てについて図７を用いて説明をする。図７において駆動部材１８に設けられている爪部１８ｂと差動部材１９に設けられている引掛け部１９ｂの位相を合わせて、図中Ｅ方向に回転させる。これによって駆動部材１８と差動部材１９は組み立て時には回転可能で、且つ光軸方向には位置が規制されるようになる。この時、駆動部材１８と差動部材１９はガタを持った状態で組み込まれる。 Next, assembly of the differential member 19 and the drive member 18 will be described with reference to FIG. The combined hook portion 19b of the phase provided to the claw portion 18b and the differential member 19 provided on the drive member 18 in FIG. 7, it is rotated in the direction E in FIG. This drive member 18 and the differential member 19 is rotatable at the time of assembly, and so the position is regulated in the optical axis direction. At this time, the drive member 18 and the differential member 19 are assembled with a backlash.

その後、付勢ばね２０を駆動部材１８と差動部材１９間にかけることによって、駆動部材１８は差動部材１９を基準に図中Ｆ方向に常に付勢されつつ一体となる。このため、駆動部材１８と差動部材１９は簡単な構成でユニット化することができる。 After that, by applying the biasing spring 20 between the driving member 18 and the differential member 19, the driving member 18 is integrated while being always biased in the F direction in the figure with respect to the differential member 19. For this reason, the drive member 18 and the differential member 19 can be unitized with a simple configuration.

そして、一体となった差動部材１９と駆動部材１８をレンズ保持部材７（レンズ鏡筒ユニット２）に組み付けるが、両者はユニット化されているため、レンズ保持部材７に組み付ける時にレンズ近傍での作業が１回で終わる。そして、余計な作業を必要としないため、不用意にレンズに傷をつけてしまうこと等が防止される。 The integrated differential member 19 and the drive member 18 are assembled to the lens holding member 7 (lens barrel unit 2). Since both are unitized, when the lens holding member 7 is assembled, Work is completed in one time. Further , since unnecessary work is not required, it is possible to prevent the lens from being carelessly damaged.

より具体的には、ユニット化された駆動部材１８と差動部材１９はレンズ保持部材７に対して図８に示すように構成される。同図においてレンズ保持部材７の係合部７ｄと駆動部材１８の内周係合部１８ｃが嵌合し、また、レンズ保持部材７の係合部７ｄと差動部材１９の内周係合部１９ｃが嵌合している。 More specifically, the unitized drive member 18 and differential member 19 are configured with respect to the lens holding member 7 as shown in FIG. The inner peripheral engaging portion 18c is fitted in the engagement portion 7d and the drive member 18 of the lenses holding member 7 Te FIG odor, also, the inner peripheral engagement of the engagement portion 7d and the differential member 19 of the lens holding member 7 The joint portion 19c is fitted.

このため、駆動部材１８（及び差動部材１９）の回転中心位置が係合部（中心決め部）７ｄによって位置決めされ、駆動部材１８と差動部材１９はレンズ鏡筒ユニット２の光軸中心に対して偏芯することなく回動することができる。 Therefore, the rotational center position of the drive member 18 (and the differential member 19) is positioned by the engaging portion (centering portion) 7d, and the drive member 18 and the differential member 19 are centered on the optical axis of the lens barrel unit 2. It can be rotated without being eccentric.

すなわち、本実施例では、駆動部材１８、差動部材１９がレンズ保持部材７の係合部７ｄに位置決めされて該レンズ保持部材７を基準に回動し、また、バリア部材１６はレンズ保持部材７に設けられた回転中心７ｃを基準に回転する。このため、レンズバリア装置は全てレンズ保持部材７を基準に動作する機構となり、余計なガタ等、すなわち駆動部材１８等が偏芯せずに動作することが可能となる。したがって、簡略化された構成で、かつ安定動作が可能なレンズバリア装置を提供することが可能になる。 That is, in this embodiment, the driving member 18 and the differential member 19 are positioned at the engaging portion 7d of the lens holding member 7 and rotated with reference to the lens holding member 7, and the barrier member 16 is the lens holding member. 7 is rotated with reference to a rotation center 7c provided on the rotation center 7c. For this reason, all the lens barrier devices have a mechanism that operates with the lens holding member 7 as a reference, and it is possible to operate without extra play or the drive member 18 or the like being decentered. Therefore, it is possible to provide a lens barrier device that can be stably operated with a simplified configuration.

また、駆動部材１８と差動部材１９は簡単な構成で一体（ユニット）化しているので組み立て時の撮影レンズの近傍での作業を少なくすることができ、撮影レンズを傷つける等の問題も回避され、簡単に組み立てることができる。 Further, since the drive member 18 and the differential member 19 are integrated (unit) with a simple configuration, the work in the vicinity of the photographic lens during assembly can be reduced, and problems such as damaging the photographic lens can be avoided. Easy to assemble.

なお、レンズ保持部材７の係合部７ｄは、円筒部７ｅの外周面における周方向の複数箇所に凸面状に形成されている。これは、円筒部７ｅの外周面に駆動部材１８及び差動部材１９をほとんどガタなく係合（嵌合）させると、両部材の当接（摺動）する面積が大きくなり大きな摩擦が生じ、該摩擦によって駆動部材１８と差動部材１９の動作が円滑に行われ難くなるためであり、本実施例のように係合部７ｄを凸面状とすることで内周係合部１８ｃ、１９ｃとの摺動における摩擦を低減させ、円滑な動作が可能となる。 The engaging portions 7d of the lens holding member 7 are formed in a convex shape at a plurality of locations in the circumferential direction on the outer peripheral surface of the cylindrical portion 7e. This is because when the drive member 18 and the differential member 19 are engaged (fitted) with almost no play on the outer peripheral surface of the cylindrical portion 7e, the contact (sliding) area of both members increases and a large friction occurs. This is because the operation of the drive member 18 and the differential member 19 is difficult to be performed smoothly due to the friction. By making the engaging portion 7d convex as in this embodiment, the inner peripheral engaging portions 18c, 19c and Friction during sliding is reduced, and smooth operation becomes possible.

本発明の実施例１におけるカメラの外観斜視図。1 is an external perspective view of a camera according to Embodiment 1 of the present invention. 本発明の実施例１におけるカメラの中央断面図（繰出し状態）。FIG. 2 is a central cross-sectional view of the camera according to Embodiment 1 of the present invention (the extended state). 本発明の実施例１におけるカメラに係るレンズバリア装置の展開斜視図。1 is a developed perspective view of a lens barrier device according to a camera in Embodiment 1 of the present invention. 本発明の実施例１におけるカメラに係るレンズバリア装置の展開斜視図。1 is a developed perspective view of a lens barrier device according to a camera in Embodiment 1 of the present invention. 本発明の実施例１におけるカメラに係るレンズバリア装置の組立て斜視図。1 is an assembled perspective view of a lens barrier device according to a camera in Embodiment 1 of the present invention. 本発明の実施例１におけるカメラに係るバリア部材の動作説明図。Explanatory drawing of operation | movement of the barrier member which concerns on the camera in Example 1 of this invention. 本発明の実施例１におけるカメラに係るレンズバリア装置の組み立て説明図。FIG. 3 is an assembly explanatory diagram of a lens barrier device according to the camera in Embodiment 1 of the present invention. 本発明の実施例１におけるカメラに係るレンズバリア装置の組み立て説明図。FIG. 3 is an assembly explanatory diagram of a lens barrier device according to the camera in Embodiment 1 of the present invention. 従来のレンズバリア装置を示す斜視図。The perspective view which shows the conventional lens barrier apparatus.

符号の説明Explanation of symbols

１カメラ本体
２レンズ鏡筒ユニット
７レンズ保持部材
７ｄ係合部（中心決め部）
１６バリア部材
１８駆動部材
１９差動部材 DESCRIPTION OF SYMBOLS 1 Camera main body 2 Lens barrel unit 7 Lens holding member 7d Engagement part (centering part)
16 Barrier member 18 Drive member 19 Differential member

Claims

第１のカム部を有するベース部材と、
レンズ鏡筒を構成するレンズ保持部材と、
前記レンズ保持部材に対して回動可能に保持され、この回動によってレンズの光路を遮光可能なバリア部材と、
前記レンズ保持部材に対して回転することにより前記バリア部材を回動させる駆動部材と、
前記駆動部材との間に付勢部材が設けられた部材であって、前記レンズ保持部材の移動に応じて前記第１のカム部と接して回転力を伝達する第２のカム部を有していて当該回転力により前記駆動部材を回転させる差動部材とを備え、
前記差動部材と前記駆動部材とは、互いに有する係合部により係合して前記付勢部材により付勢することでガタを持ってユニット化される部材であって、当該ユニット化された前記差動部材及び前記駆動部材を前記レンズ保持部材に組み付けることによって、前記レンズ保持部材に対して前記差動部材及び前記駆動部材が位置決めされていることを特徴とするカメラ。 A base member having a first cam portion ;
A lens holding member constituting the lens barrel;
A barrier member that is rotatably held with respect to the lens holding member, and is capable of blocking the optical path of the lens by this rotation;
A drive member that rotates the barrier member by rotating with respect to the lens holding member ;
A biasing member is provided between the driving member and a second cam portion that contacts the first cam portion and transmits a rotational force in accordance with the movement of the lens holding member. And a differential member that rotates the drive member by the rotational force,
The differential member and the driving member are members that are united with a backlash by being engaged with each other by an engaging portion and being urged by the urging member. A camera, wherein the differential member and the drive member are positioned with respect to the lens holding member by assembling the differential member and the drive member to the lens holding member .

前記レンズ保持部材には前記差動部材及び前記駆動部材に対する位置決め部が設けられ、該位置決め部は、前記差動部材の回転方向における複数箇所に設けられた凸形状部であることを特徴とする請求項１に記載のカメラ。 The said lens holding member positioning unit is provided with respect to the differential member and the drive member, the positioning unit, wherein the a convex portion provided at a plurality of positions in the rotational direction of the differential member The camera according to claim 1.

前記レンズ鏡筒を通過した光により形成される被写体像を光電変換する撮像素子を備えたことを特徴とする請求項１又は２に記載のカメラ。
The camera according to claim 1 or 2, characterized in that an imaging device for photoelectrically converting an object image formed by light having passed through the lens barrel.