JPH06308592A - Safety device for camera - Google Patents

Safety device for camera

Info

Publication number
JPH06308592A
JPH06308592A JP6069306A JP6930694A JPH06308592A JP H06308592 A JPH06308592 A JP H06308592A JP 6069306 A JP6069306 A JP 6069306A JP 6930694 A JP6930694 A JP 6930694A JP H06308592 A JPH06308592 A JP H06308592A
Authority
JP
Japan
Prior art keywords
lens
signal
camera
group
motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP6069306A
Other languages
Japanese (ja)
Other versions
JPH07101272B2 (en
Inventor
Hiroshi Wakabayashi
央 若林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nikon Corp
Original Assignee
Nikon Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nikon Corp filed Critical Nikon Corp
Priority to JP6930694A priority Critical patent/JPH07101272B2/en
Publication of JPH06308592A publication Critical patent/JPH06308592A/en
Publication of JPH07101272B2 publication Critical patent/JPH07101272B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Lens Barrels (AREA)
  • Camera Bodies And Camera Details Or Accessories (AREA)
  • Structure And Mechanism Of Cameras (AREA)

Abstract

PURPOSE:To provide a safety device not hindering the function of a camera because of foreign matter entering through the aperture of a film, when a rear cover is opened. CONSTITUTION:A rear group lens moving mechanism 16 withdrawing a rear group lens 2 in a direction perpendicular to an optical axis by the drive of a motor 15, a motor control circuit means controlling the drive of the motor, a detecting means detecting the displacement of a mobile member displaced prior to the rewinding, taking out or loading of the film are provided and a constitution that the rear group lens is automatically withdrawn to the withdrawal position of a photographic optical path with the detection signal of the detecting means is adopted as a technical point.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、カメラのフイルムアパ
ーチヤ部分から侵入する異物から暗箱内のレンズ等を保
護する安全装置、特に、前群レンズと後群レンズとの間
にシヤツタが設けられた撮影レンズを有するカメラの安
全装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for protecting a lens or the like in a dark box from foreign matter entering from a film aperture portion of a camera, and more particularly, a shutter is provided between a front lens group and a rear lens group. Safety device for a camera having a taking lens.

【0002】[0002]

【従来の技術】前群レンズと後群レンズとの間にシヤツ
タが設けられた撮影レンズを有するカメラにおいては、
従来前群レンズの前面はレンズバリア等によつて塵その
他の異物から安全に保護されている。しかし、後群レン
ズの後面については従来何等の保護手段も設けられてい
ないため、フイルム装填の際にカメラの裏蓋を開ける
と、カメラのフイルムアパーチヤを通してレンズ後面が
露出する。その為、フイルムアパーチヤを通して塵、切
屑その他フイルム断片等が侵入し、レンズ面に付着し、
最悪の場合には、レンズを傷付ける恐れが有つた。
2. Description of the Related Art In a camera having a photographing lens in which a shutter is provided between a front lens group and a rear lens group,
Conventionally, the front surface of the front lens group is safely protected from dust and other foreign matter by a lens barrier or the like. However, since no protection means is conventionally provided for the rear surface of the rear lens group, if the back cover of the camera is opened when the film is loaded, the rear surface of the lens is exposed through the film aperture of the camera. Therefore, dust, chips and other film fragments enter through the film aperture and adhere to the lens surface.
In the worst case, it could damage the lens.

【0003】このことは、通常のビトウインシヤツタを
有する撮影レンズばかりでなく、ビハインドシヤツタを
有する撮影レンズにリヤコンバージヨンレンズを付加し
た場合、或いは、主レンズをシヤツタと共に繰り出して
その後に副レンズを挿入するいわゆる二焦点式カメラに
おいても同様で、従来、フイルムアパーチヤ側からの内
部装置の保護については何等の対策もなされていなかつ
た。
This is not only the case when a photographing lens having a normal through shutter is used, but also when a rear conversion lens is added to a photographing lens having a behind shutter, or when the main lens is extended together with the shutter and then the sub lens. The same applies to a so-called bifocal type camera in which a lens is inserted, and conventionally, no measures have been taken to protect the internal device from the film aperture side.

【0004】[0004]

【発明が解決しようとする課題】本発明は、上記従来の
カメラにおける欠点を解決し、裏蓋を開いたときには、
フイルムアパーチヤを通して侵入した異物によつてカメ
ラの機能が阻害されることの無い安全装置を提供するこ
とを目的とする。
SUMMARY OF THE INVENTION The present invention solves the drawbacks of the conventional camera described above, and when the case back is opened,
It is an object of the present invention to provide a safety device in which the function of the camera is not hindered by foreign matter that has entered through the film aperture.

【0005】[0005]

【課題を解決するための手段】上記の目的を達成するた
めに本発明は、モータの駆動によつて後群レンズを光軸
に直角な方向に退避させる後群レンズ移動機構と、モー
タの駆動を制御するモータ制御回路手段と、フイルムの
巻戻し、フイルムの取出しまたはフイルム装填に先立つ
て変位する移動部材の変位を検知する検知手段とを設
け、その検知手段の検出信号に後群レンズを撮影光路の
退避位置へ自動的に退避させるように構成することを技
術的要点とするものである。
In order to achieve the above object, the present invention provides a rear lens group moving mechanism for retracting a rear lens group in a direction perpendicular to an optical axis by driving a motor, and a motor driving device. The motor control circuit means for controlling the movement of the film and the detection means for detecting the displacement of the moving member which is displaced prior to the film rewinding, the film removal or the film loading are provided, and the rear group lens is photographed by the detection signal of the detection means. The technical point is that the optical path is automatically retracted to the retracted position.

【0006】[0006]

【実施例】次に、本発明の実施例を添付の図面に基づい
て詳しく説明する。図1は本発明の実施例を示す二焦点
カメラの一部上面を残して破断した断面図で、撮影レン
ズ鏡筒がカメラ本体から繰り出された望遠状態を示す。
図1において、撮影レンズは、単独にても撮影可能な前
群の短焦点距離(以下「広角」と称する。)の主レンズ
1と、長焦点距離(以下「望遠」と称する。)に切り替
える際に主レンズ1の光軸上に挿入される後群の副レン
ズ2とから成り、主レンズ1を保持する主レンズ枠3は
台板4に固設されたシヤツタ基板5に取り付けられてい
る。台板4とシヤツタ基板5との間には絞り兼用のシヤ
ツタ6が設けられ、また、主レンズ1の前側には、レン
ズバリア装置7が設けられ、主レンズ枠3、シヤツタ基
板5およびレンズバリア装置7の外周を覆つて撮影レン
ズ鏡筒8が台板4の前側に固設されている。
Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 is a sectional view of a bifocal camera according to an embodiment of the present invention, which is cut away with a part of its upper surface left, showing a telephoto state in which a taking lens barrel is extended from a camera body.
In FIG. 1, the photographic lens is switched between a main lens 1 having a short focal length (hereinafter referred to as “wide angle”) of the front group and a long focal length (hereinafter referred to as “telephoto”) that can be photographed independently. At this time, the main lens frame 3 which is composed of the rear lens sub-lens 2 which is inserted on the optical axis of the main lens 1 and which holds the main lens 1 is attached to the shutter substrate 5 fixed to the base plate 4. . A shutter 6 that also serves as a diaphragm is provided between the base plate 4 and the shutter substrate 5, and a lens barrier device 7 is provided in front of the main lens 1, and the main lens frame 3, the shutter substrate 5, and the lens barrier are provided. A taking lens barrel 8 is fixed to the front side of the base plate 4 so as to cover the outer periphery of the device 7.

【0007】台板4の裏側には、副レンズ2を保持する
副レンズ枠9が支軸10のまわりに回動可能に支持さ
れ、さらに図2に示すように、光軸方向に伸びた送りね
じ軸11と螺合する送りナツト12と一体の歯車12
を、ベベルギヤ14を介して回転させる駆動モータ15
が固設され、駆動モータの回転により台板4が光軸に沿
つて移動するように構成されている。また、副レンズ枠
9は、減速ギヤ列16を介して駆動モータ15によつて
駆動され、撮影レンズ鏡筒8が台板4と共に図1に示す
望遠位置から図3に示す広角位置へ繰り込まれると、そ
の副レンズ枠9は副レンズ2を主レンズ1の光軸に一致
して置く図2中で実線にて示す挿入位置から破線にて示
す撮影光路外の退避位置まで移動する如く構成されてい
る。
A sub-lens frame 9 for holding the sub-lens 2 is rotatably supported on the back side of the base plate 4 about a support shaft 10. Further, as shown in FIG. Gear 12 integrated with feed nut 12 screwed with screw shaft 11
Drive motor 15 for rotating the motor through the bevel gear 14.
Is fixed, and the base plate 4 is configured to move along the optical axis by the rotation of the drive motor. Further, the sub lens frame 9 is driven by the drive motor 15 via the reduction gear train 16, and the taking lens barrel 8 is retracted together with the base plate 4 from the telephoto position shown in FIG. 1 to the wide angle position shown in FIG. Then, the sub-lens frame 9 moves from the insertion position shown by the solid line in FIG. 2 where the sub-lens 2 is placed so as to match the optical axis of the main lens 1 to the retracted position outside the photographing optical path shown by the broken line. Has been done.

【0008】フイルムアパーチヤ17とフイルム供給室
18およびフイルム巻取り室19を有するカメラ本体2
0の前面には、移動可能な台板4と撮影レンズ鏡筒8と
を収容する突出壁21が設けられ、そのカメラ本体20
と突出壁21とは、外装カバー22によつて覆われてい
る。またその外装カバー22の上面には、図1に示す如
く焦点距離切替え操作部材23とレリーズ釦24とが設
けられている。カメラ本体20と台板4との間には、台
板4に設けられた駆動モータ15やシヤツタ制御装置2
5等の電気装置と、これ等を制御するカメラ側の制御装
置とを電気的に接続するためのフレキシブル回路板26
が設けられている。さらにまた、カメラの裏蓋27の内
側には、カメラ本体20側に設けられた裏蓋スイツチS
1 を開閉させる突子28が設けられている。この裏蓋
スイツチSW1 は裏蓋27が閉位置に在るか開位置に在
るかを検出するための検知手段を構成している。また、
カメラ本体20のフイルムアパーチヤ17の前側の周囲
には突出壁29が設けられ、台板4は、広角位置におい
てその突出壁29の前端29aに接近する位置まで繰り
込まれるように構成されている。これにより、台板4の
裏面に設けられた副レンズ2、減速ギヤ列16、駆動モ
ータ15等はフイルムアパーチヤ17を通して見えない
ようになり、また、塵等が内部に侵入して副レンズ2を
曇らせたり歯車列16との作動を害することが防止され
る。特に副レンズ2はフイルムアパーチヤ17の前面か
ら退避するので、フイルムアパーチヤを通して侵入する
異物等によつて傷付けられる恐れが無く安全に保護され
る。
A camera body 2 having a film aperture 17, a film supply chamber 18 and a film winding chamber 19.
On the front surface of 0, a projecting wall 21 that accommodates the movable base plate 4 and the taking lens barrel 8 is provided.
The projecting wall 21 and the projecting wall 21 are covered with an exterior cover 22. A focal length switching operation member 23 and a release button 24 are provided on the upper surface of the outer cover 22 as shown in FIG. Between the camera body 20 and the base plate 4, a drive motor 15 provided on the base plate 4 and a shutter control device 2 are provided.
A flexible circuit board 26 for electrically connecting an electric device such as 5 and a control device on the camera side for controlling these electric devices.
Is provided. Furthermore, inside the back cover 27 of the camera, a back cover switch S provided on the camera body 20 side is provided.
A protrusion 28 for opening and closing W 1 is provided. The back cover switch SW 1 constitutes a detecting means for detecting whether the back cover 27 is in the closed position or the open position. Also,
A projecting wall 29 is provided around the front side of the film aperture 17 of the camera body 20, and the base plate 4 is configured to be retracted to a position approaching the front end 29a of the projecting wall 29 in the wide-angle position. . As a result, the sub-lens 2, the reduction gear train 16, the drive motor 15 and the like provided on the back surface of the base plate 4 become invisible through the film aperture 17 and dust and the like enter the sub-lens 2. It is possible to prevent clouding of the gear and damage to the operation of the gear train 16. In particular, since the sub lens 2 is retracted from the front surface of the film aperture 17, there is no risk of being scratched by foreign matter or the like that enters through the film aperture, so that it is safely protected.

【0009】また、前群の主レンズ1の後面はシヤツタ
6によつて覆われているので塵や異物が付着する恐れが
無く安全に保護される。図4は、図1に示す実施例カメ
ラにおける駆動モータ15を制御する回路の概略を示す
回路図である。このカメラにおいては、図1には図示さ
れない被写体輝度検出装置40および自動距離検出装置
50が設けられ、絞り兼用シヤツタ6を駆動制御するシ
ヤツタ制御装置23と駆動モータ15の回転を制御する
モータ制御回路60とは、その輝度検出装置40、自動
距離検出装置50と共に、電源スイツチSW0 の投入に
より動作を開始するマイクロプロセツサ(CPU)30
の指令に従つて動作するように構成されている。レリー
ズ釦24(図1参照)を半押しすると、レリーズスイツ
チSW3 が閉じ、そのレリーズ情報がCPU30に入力
される。これにより、CPU30は、自動距離検出装置
を動作させて被写体までの距離を検出し、その検出信号
に基づいて、モータ制御回路60を介して駆動モータを
駆動させ、台板4を被写体距離に応じて移動させて距離
調節を行う。また同時に被写体からの光を受光する輝度
検出装置からの検出信号に基づいて適正な絞り値とシヤ
ツタ速度値とを演算し、その演算結果をメモリーする。
さらにレリーズ釦24が全押しされるとシヤツタ6はレ
リーズされ、シヤツタ制御装置23はCPU30にメモ
リーされた絞り値と速度値との組合せに従つてシヤツタ
6を開閉させ、露光を終了する。露光が終了すると、C
PU30は所定のシーケンスに従つてモータ制御回路6
0に信号を送り駆動モータ15を逆転させて台板4と共
に撮影レンズ鏡筒8をリセツト位置へ復帰させる。撮影
レンズ鏡筒8がリセツト位置に復帰すると、CPU30
はリセツト台板4に連動するリセツトスイツチSW5
らのリセツト情報を入力して、駆動モータ15を停止さ
せる。
Further, since the rear surface of the main lens 1 of the front group is covered by the shutter 6, there is no danger of dust or foreign matter adhering to it, and the lens is protected safely. FIG. 4 is a circuit diagram showing an outline of a circuit for controlling the drive motor 15 in the camera of the embodiment shown in FIG. In this camera, a subject luminance detecting device 40 and an automatic distance detecting device 50, which are not shown in FIG. 1, are provided, and a shutter control device 23 for driving and controlling the diaphragm / shutter 6 and a motor control circuit for controlling the rotation of the drive motor 15. Reference numeral 60 denotes a brightness detecting device 40, an automatic distance detecting device 50, and a microprocessor (CPU) 30 which starts its operation when a power switch SW 0 is turned on.
It is configured to operate according to the instructions of. When the release button 24 (see FIG. 1) is pressed halfway, the release switch SW 3 is closed and the release information is input to the CPU 30. As a result, the CPU 30 operates the automatic distance detecting device to detect the distance to the subject, and based on the detection signal, drives the drive motor via the motor control circuit 60 to make the base plate 4 respond to the subject distance. Move to adjust the distance. At the same time, an appropriate aperture value and shutter speed value are calculated on the basis of a detection signal from a brightness detection device that receives light from a subject, and the calculation result is stored in memory.
Further, when the release button 24 is fully pressed, the shutter 6 is released, and the shutter control device 23 opens and closes the shutter 6 according to the combination of the aperture value and the speed value stored in the CPU 30, and the exposure is completed. After exposure, C
The PU 30 follows the motor control circuit 6 according to a predetermined sequence.
A signal is sent to 0 to reverse the drive motor 15 to return the taking lens barrel 8 together with the base plate 4 to the reset position. When the taking lens barrel 8 returns to the reset position, the CPU 30
Inputs reset information from the reset switch SW 5 which is interlocked with the reset base plate 4 to stop the drive motor 15.

【0010】一方、焦点距離切替え操作部材23(図1
参照)を記号「T」から「W」に切り替えると、この焦
点距離切替え操作部材23に連動するT/W切替えスイ
ツチSW2 からの切替え情報に基づいて、CPUは駆動
モータ15を駆動させ、台板4と共に撮影レンズ鏡筒8
は望遠位置から広角位置へ図3に示すように繰り込まれ
る。また同時に、副レンズ枠9は図1の挿入位置から、
図3に示すように、フイルムアパーチヤ17の前部に設
けられた突出壁29より外側の退避位置へ移動し、撮影
レンズは主レンズ1のみの短焦点レンズに切り替えられ
る。さらに、台板4が望遠位置から広角位置へ移動する
と、台板4の動きに連動して撮影レンズ鏡筒8が望遠・
広角いずれの位置に在るかを検出する図示されないエン
コーダのようなレンズ位置検出装置のレンズ位置検出ス
イツチSW4 からの位置情報がCPU30に入力され
る。
On the other hand, the focal length switching operation member 23 (see FIG.
Reference) from the symbol “T” to “W”, the CPU drives the drive motor 15 on the basis of the switching information from the T / W switching switch SW 2 linked to the focal length switching operation member 23, Taking lens barrel 8 together with plate 4
Is moved from the telephoto position to the wide-angle position as shown in FIG. At the same time, the sub lens frame 9 is moved from the insertion position in FIG.
As shown in FIG. 3, the photographing lens is moved to the retracted position outside the projecting wall 29 provided at the front part of the film aperture 17 and the photographing lens is switched to the short focus lens having only the main lens 1. Furthermore, when the base plate 4 moves from the telephoto position to the wide-angle position, the taking lens barrel 8 is moved to the telephoto position as the base plate 4 moves.
Position information from a lens position detection switch SW 4 of a lens position detection device such as an encoder (not shown) for detecting the wide angle position is input to the CPU 30.

【0011】図5はCPU30におけるレンズ制御の流
れ線図である。CPU30は、裏蓋スイツチSW1 、T
/W切替えスイツチSW2 またはレリーズスイツチSW
3 が切り替わる信号により動作を開始し、先ず、裏蓋2
7が閉じているか否かを判断(ステツプ101)する。
この判断は、裏蓋スイツチSW1 からの裏蓋開閉情報に
基づいて行われる。さらに、ステツプ101がNOの場
合、すなわち裏蓋27が開成状態にあるときは、台板4
と共にレンズ位置が広角側リセツト位置にあるか否かが
判断(ステツプ102)される。この場合レンズ位置情
報は、台板4に連動するT/W位置検出スイツチSW4
とリセツトスイツチSW5 からの情報に基づいて判断さ
れる。もし、レンズが広角側リセツト位置に無い場合す
なわちステツプ102がNOのときは、レンズは台板4
と共に繰り込まれ(ステツプ103)、広角リセツト位
置に達すると、裏蓋27が閉じられるまで待機する(ス
テツプ105)。また、ステツプ102における判断が
YESのとき、すなわちレンズが広角側セツト位置にあ
るときも、裏蓋27が閉じられるまで待機する(ステツ
プ104)。
FIG. 5 is a flow chart of lens control in the CPU 30. The CPU 30 has a back cover switch SW 1 , T
/ W switch switch SW 2 or release switch SW
The operation is started by the signal that 3 is switched, and first, the back cover 2
It is determined whether or not 7 is closed (step 101).
This judgment is made based on the back lid opening / closing information from the back lid switch SW 1 . Further, when step 101 is NO, that is, when the back cover 27 is in the open state, the base plate 4
At the same time, it is judged whether or not the lens position is at the wide-angle side reset position (step 102). In this case, the lens position information is the T / W position detection switch SW 4 linked to the base plate 4.
It is judged based on the information from the reset switch SW 5 . If the lens is not in the wide-angle side reset position, that is, if step 102 is NO, the lens is the base plate 4
When the wide-angle reset position is reached, the process waits until the back cover 27 is closed (step 105). Also, when the determination in step 102 is YES, that is, when the lens is at the wide-angle side set position, it waits until the back cover 27 is closed (step 104).

【0012】ステツプ101またはステツプ104にお
いて裏蓋27が閉じられていると判断された場合すなわ
ちYESのときは、焦点距離切替え操作部材23に連動
するT/W切替えスイツチSW2 からの情報により望遠
(T)側が選択されているか否かが判断(ステツプ10
5)される。もし、その判断がNOの場合すなわち広角
(W)が選択されているときは、レンズ位置検出スイツ
チSW4 からの情報により、実際にレンズが広角側リセ
ツト位置に在るか否かが判断(ステツプ106)され、
YESの場合すなわち広角側リセツト位置にレンズが在
るときはステップ110に移行し、望遠位置に在る場合
にはレンズは繰り込まれ(ステツプ107)、リセツト
位置に達するとステップ110に移行する。
If it is determined in step 101 or step 104 that the back cover 27 is closed, that is, if the answer is YES, the telephoto (from the T / W switching switch SW 2 interlocked with the focal length switching operation member 23 is set to the telephoto ( It is judged whether or not the (T) side is selected (step 10
5) is done. If the determination is NO, that is, if the wide angle (W) is selected, it is determined whether the lens is actually at the wide angle side reset position from the information from the lens position detection switch SW 4 (step 106)
In the case of YES, that is, when the lens is at the wide-angle side reset position, the process proceeds to step 110, and when it is at the telephoto position, the lens is retracted (step 107), and when the lens reaches the reset position, the process proceeds to step 110.

【0013】一方、ステツプ105における。判断がY
ESのとき、すなわちT/W切替え操作部材23が望遠
位置(T)にセツトされている場合には、レンズ位置検
出スイツチSW4 からの情報によりレンズが望遠側リセ
ツト位置に置かれているか否かが判断(ステツプ10
8)され、もしNOのときすなわちレンズが広角側リセ
ツト位置にあるときは、レンズが繰り出され(ステツプ
109)、望遠リセツト位置に到達したとき、次のステ
ップ110に移行する。
On the other hand, in step 105. Judgment is Y
At the time of ES, that is, when the T / W switching operation member 23 is set to the telephoto position (T), it is determined whether the lens is placed at the telephoto side reset position based on the information from the lens position detection switch SW 4 . Is judged (Step 10
8) If NO, that is, if the lens is at the wide-angle side reset position, the lens is extended (step 109), and when the lens reaches the telephoto reset position, the routine proceeds to the next step 110.

【0014】ステツプ108において、YESの場合、
すなわちレンズが望遠側リセツト位置にあると判断され
たならば、次にレリーズ釦24に連動するレリーズスイ
ツチSW3 がONされたか否かが判断(ステツプ11
0)され、レリーズスイツチSW3 がONとなると、C
PU30は、自動距離検出装置50からの検出信号に基
づいて自動焦点調節(ステツプ111)の動作を行いさ
らに、被写体からの光を受光する輝度検出装置(40)
からの検出信号に基づいて適正な絞り値とシヤツタ速度
値とが演算して適正露出値を自動設定(ステツプ11
2)し、引き続くシーケンスに従つて撮影(ステツプ1
16)のために動作し、撮影が完了すると、その完了信
号により動作をストツプする。
If YES at step 108,
That if the lens is determined to be in the telephoto side reset position, then whether or not the release Sui Tutsi SW 3 interlocked with the shutter release button 24 is ON is determined (step 11
0) and the release switch SW 3 is turned on, C
The PU 30 performs the operation of automatic focus adjustment (step 111) based on the detection signal from the automatic distance detection device 50, and further, the brightness detection device (40) that receives the light from the subject.
A proper aperture value and a shutter speed value are calculated on the basis of a detection signal from the camera to automatically set a proper exposure value (step 11).
2) and shoot according to the following sequence (Step 1
16), and when the photographing is completed, the operation is stopped by the completion signal.

【0015】上記の実施例においては、フイルム交換あ
るいはフイルム装填に先立つて開かれる裏蓋の動きを検
知する裏蓋スイツチSW1 からの情報に基づいて主レン
ズ1と副レンズ2とが移動するように構成されている。
しかし、主レンズ1と副レンズ2との駆動は、裏蓋の開
閉に直接連動するスイツチSW からの情報ばかりでな
く、例えば、巻戻し釦の押動やフイルム巻上げ終端にお
けるフイルムの張力変化を検知するスイツチのような、
フイルムの巻戻しに先立つて変位する部材の動きを検知
するスイツチ手段や、フイルムパトローネ軸と巻戻し軸
との結合を解除する巻戻しノブの軸方向の摺動動作や裏
蓋錠止装置の錠止解除動作のようなフイルムの取出し、
装填に先立つて変位する部材に連動するスイツチを設
け、そのスイツチからの信号により、副レンズを自動的
に退避させると共に主レンズを沈胴位置まで繰込むよう
に構成してもよい。
In the above embodiment, the main lens 1 and the sub lens 2 are moved based on the information from the back cover switch SW 1 which detects the movement of the back cover which is opened prior to the film exchange or the film loading. Is configured.
However, the driving of the main lens 1 and the sub-lens 2 is not limited to the information from the switch SW that is directly linked to the opening and closing of the back cover, but also detects, for example, the pressing of the rewind button or the change in the film tension at the end of film winding. Like a switch,
A switch means for detecting the movement of the member that is displaced prior to the film rewinding, an axial sliding movement of the film rewinding knob for releasing the coupling between the film cartridge shaft and the rewinding shaft, and a lock for the back cover locking device. Taking out the film like the stop release operation,
A switch that interlocks with a member that is displaced prior to loading may be provided, and the sub-lens may be automatically retracted and the main lens may be retracted to the retracted position according to a signal from the switch.

【0016】また、上記の実施例においては、裏蓋の閉
動作によつて、副レンズの自動退避が解除されるように
構成されているが、裏蓋錠止装置の錠止動作、フイルム
の空送りまたは空送り釦の押圧動作を検知するスイツチ
の検出信号等に応じて副レンズの自動退避が解除される
ようにしてもよい。なお、上記の実施例は二焦点式カメ
ラにおいて主レンズと共に副レンズが同一のモータによ
つて駆動されるように構成されているが前群レンズと後
群レンズとの間にシヤツタが設けられた撮影レンズを有
するカメラにおいては後群のみを退避させるように構成
すればよい。
Further, in the above embodiment, the automatic retraction of the sub-lens is released by the closing operation of the back cover. However, the locking operation of the back cover locking device and the film The automatic retraction of the sub-lens may be canceled in response to a detection signal of a switch for detecting the idling or the pushing operation of the idling button. In the above-described embodiment, in the bifocal type camera, the main lens and the sub-lens are driven by the same motor, but a shutter is provided between the front lens group and the rear lens group. In a camera having a taking lens, only the rear group may be retracted.

【0017】[0017]

【発明の効果】以上の如く本発明によれば、少なくとも
裏蓋が開成されたときは、副レンズ(後群レンズ)がフ
イルムアパーチヤ前面から退避し、主レンズ(前群レン
ズ)の後面はシヤツタによつて覆われるので、フイルム
アパーチヤを通して侵入する塵その他の異物から、撮影
レンズを安全に保護することができる。さらに、実施例
に示すように二焦点式カメラに組み込めば、後群レンズ
が退避すると同時に前群レンズと共にレンズ移動機構が
フイルムアパーチヤの外側部に接近し、フイルムアパー
チヤの前面がシヤツタ部分によつて覆われるので、フイ
ルムアパーチヤから侵入する塵や異物が直接レンズ移動
機構に付着することが無い。従つてレンズ移動機構の作
動が不円滑になつたり故障を起こす原因を除去すること
ができる。
As described above, according to the present invention, at least when the case back is opened, the sub lens (rear group lens) is retracted from the front surface of the film aperture and the rear surface of the main lens (front group lens) is Since it is covered by the shutter, the taking lens can be safely protected from dust and other foreign substances that enter through the film aperture. Furthermore, if it is incorporated into a bifocal camera as shown in the embodiment, the rear lens group retracts and at the same time the lens moving mechanism moves closer to the outer side of the film aperture with the front lens group, and the front surface of the film aperture becomes the shutter part. Since it is covered with dust, dust and foreign matter entering from the film aperture will not directly adhere to the lens moving mechanism. Therefore, it is possible to eliminate the cause of the operation of the lens moving mechanism becoming unsmooth or causing a failure.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の実施例を示す二焦点式カメラの横断面
FIG. 1 is a cross-sectional view of a bifocal camera showing an embodiment of the present invention.

【図2】図1の実施例におけるレンズ駆動機構部の斜視
FIG. 2 is a perspective view of a lens driving mechanism portion in the embodiment of FIG.

【図3】図1の実施例カメラの裏蓋を開いたときの状態
を示す断面図
FIG. 3 is a cross-sectional view showing a state when the back cover of the embodiment camera of FIG. 1 is opened.

【図4】図1の実施例カメラの制御回路図FIG. 4 is a control circuit diagram of the camera of the embodiment shown in FIG.

【図5】図4中に設けられたマイクロプロセツサCPU
の動作を示す流れ線図
5 is a microprocessor CPU provided in FIG. 4;
Flow diagram showing the operation of

【主要部分の符号の説明】[Explanation of symbols for main parts]

1----主レンズ(前群レンズ) 2----副レンズ(後群レンズ) 3----主レンズ枠 4----台板 6----シヤツタ 8----撮影レンズ鏡筒 11〜13----台板移動機構 15----モータ 16----減速ギヤ列(後群レンズ移動機構) 23----焦点距離切替え操作部材 27----裏蓋(変位部材) 30,60----モータ制御回路手段 SW1 ----裏蓋スイツチ(検知手段)1 ---- Main lens (front lens group) 2 ---- Sub lens (rear lens group) 3 ---- Main lens frame 4 ---- Base plate 6 ---- Shutter 8 ---- Shooting lens barrel 11-13 ---- Base plate moving mechanism 15 ---- Motor 16 ---- Reduction gear train (rear group lens moving mechanism) 23 ---- Focal length switching operation member 27 --- -Back cover (displacement member) 30, 60 ---- Motor control circuit means SW 1 ---- Back cover switch (detection means)

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 前群レンズと後群レンズとの間にシヤ
ツタが設けられた撮影レンズを有するカメラにおいて、 モータの駆動によつて前記後群レンズを撮影光路外の退
避位置へ移動させる後群レンズ移動手段と、 フイルムの巻戻し、フイルムの取出しまたはフイルムの
装填のいずれかに先立って起こる状態の変化を検知する
検知手段と、 該検知手段からの検知信号を受けて前記後群レンズを前
記退避位置へ移動させるように前記モータの駆動を制御
するモータ制御回路手段とを有することを特徴とするカ
メラの安全装置。
1. A camera having a photographing lens in which a shutter is provided between a front lens group and a rear lens group, wherein the rear lens group is moved to a retracted position outside a photographing optical path by driving a motor. A lens moving means, a detecting means for detecting a change in state occurring prior to either film rewinding, film taking out or film loading, and a rear group lens which receives a detection signal from the detecting means. And a motor control circuit means for controlling the drive of the motor so as to move it to the retracted position.
【請求項2】 前記撮影レンズは、それ自身撮影可能
な前群の主レンズ(1)と、焦点距離を短焦点から長焦
点に切り替える後群の副レンズ(2)とから成り、前記
主レンズ(1)と副レンズ(2)とは前記モータによつ
て駆動され前記副レンズ(2)が退避位置まで移動した
ときに前記シヤツタ(6)は前記主レンズ(1)と共
に、カメラのフイルムアパーチヤ(17)に近付く方向
に繰り込まれることを特徴とする請求項1記載のカメラ
の安全装置。
2. The taking lens comprises a front group main lens (1) capable of photographing itself and a rear group sub lens (2) for switching a focal length from a short focus to a long focus. (1) and the sub-lens (2) are driven by the motor and when the sub-lens (2) moves to the retracted position, the shutter (6) together with the main lens (1) causes the film aperture of the camera. The safety device for a camera according to claim 1, wherein the safety device is retracted in a direction approaching the chaier (17).
【請求項3】 前記検知手段は、カメラの裏蓋(2
7)の開動作を検知するスイツチ(SW1 )であること
を特徴とする請求項1または請求項2記載のカメラの安
全装置。
3. The camera back cover (2)
The safety device for a camera according to claim 1 or 2, which is a switch (SW 1 ) for detecting the opening operation of 7).
【請求項4】 前群レンズと後群レンズとの間にシヤ
ツタが設けられた撮影レンズを有するカメラにおいて、
モータの駆動によつて前記後群レンズを撮影光路内の
挿入位置から撮影光路外の退避位置へ移動させる後群レ
ンズ移動手段と、 前記後群レンズを前記退避位置に位置させるべく操作さ
れると退避信号を、前記挿入位置に位置させるべく操作
されると挿入信号をそれぞれ出力する操作手段と、 全フィルムの撮影完了から裏蓋の開放までの間に起こる
状態の変化を検知し、裏蓋開放信号を出力する検知手段
と、 前記後群レンズが、前記退避位置にあると退避位置信号
を、該退避位置にないと非退避位置信号を、前記挿入位
置にあると挿入位置信号を、該挿入位置にないと非挿入
位置信号をそれぞれ出力する位置検出手段と、 前記退避信号と裏蓋開放信号とのいずれか少なくとも一
方と、前記非退避位置信号とを共に受けると、前記後群
レンズを前記退避位置へ移動させるように前記モータの
駆動を制御し、前記挿入信号と前記非挿入位置信号とを
共に受け、かつ前記裏蓋開放信号を受けないと、前記後
群レンズを前記挿入位置へ移動させるように前記モータ
の駆動を制御するモータ制御回路手段と、 前記退避信号と退避位置信号とを共に受けてからでない
と、または前記挿入信号と挿入位置信号とを共に受けて
からでないと、シャッタレリーズ操作を不可能とする手
段とを有することを特徴とするカメラの安全装置。
4. A camera having a photographing lens in which a shutter is provided between a front lens group and a rear lens group,
Rear group lens moving means for moving the rear group lens from the insertion position in the photographing optical path to a retracted position outside the photographing optical path by driving a motor, and when operated to position the rear group lens in the retracted position. When the retract signal is operated to position it at the insertion position, the operation means that outputs the insertion signal respectively, and the state change that occurs between the completion of shooting of all films and the opening of the back cover are detected, and the back cover is opened. When the rear group lens is in the retracted position, a retracting position signal, a non-retracted position signal when the rear group lens is in the retracted position, and an insertion position signal when the rear position lens is in the inserted position When both the position detecting means that outputs a non-insertion position signal when not in the position, at least one of the retreat signal and the back lid opening signal, and the non-retract position signal are received, the rear group lens is activated. The rear lens group is moved to the insertion position by controlling the drive of the motor so as to move it to the retracted position, receiving both the insertion signal and the non-insertion position signal, and not receiving the case back opening signal. Motor control circuit means for controlling the drive of the motor so as to move, and after receiving both the retreat signal and the retreat position signal, or after receiving both the insertion signal and the insertion position signal, A safety device for a camera, comprising: means for making a shutter release operation impossible.
JP6930694A 1994-04-07 1994-04-07 Camera safety device Expired - Fee Related JPH07101272B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6930694A JPH07101272B2 (en) 1994-04-07 1994-04-07 Camera safety device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6930694A JPH07101272B2 (en) 1994-04-07 1994-04-07 Camera safety device

Publications (2)

Publication Number Publication Date
JPH06308592A true JPH06308592A (en) 1994-11-04
JPH07101272B2 JPH07101272B2 (en) 1995-11-01

Family

ID=13398751

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6930694A Expired - Fee Related JPH07101272B2 (en) 1994-04-07 1994-04-07 Camera safety device

Country Status (1)

Country Link
JP (1) JPH07101272B2 (en)

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US7043154B2 (en) 2002-08-27 2006-05-09 Pentax Corporation Photographing lens having an optical element retracting mechanism
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USRE40609E1 (en) 1997-06-12 2008-12-23 Hoya Corporation Digital camera with moveable image pickup device
USRE40610E1 (en) 1997-06-12 2008-12-23 Hoya Corporation Digital camera with moveable image pickup device
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JP2006133796A (en) * 2002-02-21 2006-05-25 Pentax Corp Collapsible zoom lens barrel and method of collapsing zoom lens barrel
US7025512B2 (en) 2002-08-27 2006-04-11 Pentax Corporation Retracting mechanism of a retractable lens
US7043154B2 (en) 2002-08-27 2006-05-09 Pentax Corporation Photographing lens having an optical element retracting mechanism
US7039311B2 (en) 2002-08-27 2006-05-02 Pentax Corporation Rotation transfer mechanism and a zoom camera incorporating the rotation transfer mechanism
CN100460979C (en) * 2002-08-27 2009-02-11 Hoya株式会社 Method of controlling brightness of user-selected area for image desplay device
USRE42717E1 (en) 2002-08-27 2011-09-20 Hoya Corporation Cam mechanism of a photographing lens
US7455465B2 (en) 2004-07-26 2008-11-25 Ricoh Company, Ltd. Optical system apparatus, camera and portable information terminal apparatus
US8000042B2 (en) 2004-07-26 2011-08-16 Ricoh Company, Ltd. Lens barrel, camera and mobile information terminal
US8537478B2 (en) 2004-07-26 2013-09-17 Ricoh Company, Ltd. Lens barrel, camera and mobile information terminal

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