JPH0763969A - Device for preventing internal reflection in lens barrel of zoom camera - Google Patents
Device for preventing internal reflection in lens barrel of zoom cameraInfo
- Publication number
- JPH0763969A JPH0763969A JP20925693A JP20925693A JPH0763969A JP H0763969 A JPH0763969 A JP H0763969A JP 20925693 A JP20925693 A JP 20925693A JP 20925693 A JP20925693 A JP 20925693A JP H0763969 A JPH0763969 A JP H0763969A
- Authority
- JP
- Japan
- Prior art keywords
- lens barrel
- shielding plate
- printed circuit
- internal reflection
- circuit board
- 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
Links
Landscapes
- Lens Barrels (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ズームカメラにおける
鏡筒内の内面反射を防止する装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing internal reflection inside a lens barrel in a zoom camera.
【０００２】[0002]
【従来の技術】ズームカメラにおいて、鏡筒内の内面反
射を防止するために遮光板等を設けており、従来は、固
定された遮光板か、移動可能なカム筒などに固設された
遮光板、あるいは鏡筒内に設けられた植毛紙等が知られ
ている。2. Description of the Related Art In a zoom camera, a light-shielding plate or the like is provided to prevent internal reflection inside a lens barrel. Conventionally, a light-shielding plate fixed or a light-shielding member fixed to a movable cam barrel is used. A plate or flocked paper provided in a lens barrel is known.
【０００３】[0003]
【発明が解決しようとする課題】しかし、先ず、固定さ
れた遮光板では、ズームカメラなどの場合、収納時と繰
り出した時とでは、入射光線の角度が違い、その両方の
位置で十分な遮光を得るのは難しい。また、遮光板を途
中に固定してしまうため、レンズを収納したときにその
分のスペースが必要となり、コンパクト化には向かない
ものであった。However, first of all, in the case of a zoom camera or the like, the angle of the incident light beam is different between the retracted state and the extended state in the case of the fixed light-shielding plate, and sufficient light-shielding is performed at both positions. Hard to get. Further, since the light shielding plate is fixed in the middle, a space corresponding to that is required when the lens is stored, which is not suitable for downsizing.
【０００４】次に、移動可能なカム筒などに固設された
遮光板の場合も、前記と同様、入射光線の角度の違いか
ら、繰り出した時に遮光が十分とはいえないものであっ
た。また、植毛紙の場合は、鏡筒内に貼り付けるため、
鏡筒の径がどうしても大きくなってしまうという欠点が
あった。Next, in the case of a light-shielding plate fixedly mounted on a movable cam barrel or the like, as in the above case, due to the difference in the angle of the incident light beam, it cannot be said that the light-shielding is sufficient when it is extended. Also, in the case of flocked paper, since it is attached inside the lens barrel,
There was a drawback that the diameter of the lens barrel would inevitably increase.
【０００５】そこで、本発明の目的は、ズームカメラに
おいて、鏡筒の変倍動作に追従して、有効光線に対し遮
光板をほぼ一定の間隔で動かすことにより、コンパクト
化を図りながら、有害な内面反射を効果的に防止できる
ようにした鏡筒内内面反射防止装置を提供することにあ
る。Therefore, an object of the present invention is to reduce the size of a zoom camera by moving the light shield plate at a substantially constant interval with respect to the effective light rays in accordance with the zooming operation of the lens barrel, thereby reducing harmful effects. An object of the present invention is to provide a lens barrel inner surface antireflection device capable of effectively preventing inner surface reflection.
【０００６】[0006]
【課題を解決するための手段】以上の課題を解決すべく
本発明は、カメラ本体と鏡筒内のシャッター機構とを接
続するフレキシブルプリント基板を有するズームカメラ
において、前記フレキシブルプリント基板を前記鏡筒の
周方向の少なくとも３箇所に折り曲げ状態で設け、前記
鏡筒内の内面反射を防止する遮光板を、変倍動作の際の
前記フレキシブルプリント基板の移動に追従して、その
フレキシブルプリント基板の折り曲げ端部に接するよう
移動可能に組み付けてなる鏡筒内内面反射防止装置の構
成を特徴としている。In order to solve the above problems, the present invention provides a zoom camera having a flexible printed circuit board for connecting a camera body and a shutter mechanism in the lens barrel, wherein the flexible printed circuit board is the lens barrel. A light-shielding plate that is provided in a bent state at at least three positions in the circumferential direction of the lens barrel to prevent internal reflection inside the lens barrel, and follows the movement of the flexible printed circuit board during the zooming operation to bend the flexible printed circuit board. It is characterized by the structure of the inner reflection preventing device for the inner surface of the lens barrel, which is movably assembled so as to come into contact with the end portion.
【０００７】なお、前記遮光板を前記フレキシブルプリ
ント基板の折り曲げ端部に当接する方向に付勢するバネ
をさらに設けている。A spring is further provided for urging the light shielding plate in a direction in which the light shielding plate is brought into contact with the bent end portion of the flexible printed circuit board.
【０００８】[0008]
【作用】遮光板は、変倍動作の際のフレキシブルプリン
ト基板の移動に追従して、その折り曲げ端部に接しなが
ら移動し、即ち、シャッター機構等が設けられた前進筒
などの動きの約半部の動きを常にするため、有効光線に
対し、ほぼ一定の間隔で動くことにより内面反射を防止
する。The light-shielding plate follows the movement of the flexible printed circuit board during the zooming operation and moves while contacting the bent end portion thereof, that is, about half of the movement of the forward movement cylinder or the like provided with the shutter mechanism and the like. In order to constantly move the part, the internal reflection is prevented by moving the effective ray at a substantially constant interval.
【０００９】例えば、遮光板の駆動はバネにより行われ
る。For example, the light shielding plate is driven by a spring.
【００１０】[0010]
【実施例】以下に、本発明に係るズームカメラの鏡筒内
内面反射防止装置の実施例を図１乃至図７に基づいて説
明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the internal reflection preventing device for a lens barrel of a zoom camera according to the present invention will be described below with reference to FIGS.
【００１１】先ず、本発明を適用した一例としてのズー
ムカメラの鏡筒の構成を示す図１乃至図４において、１
はカメラ本体、２は固定筒、３は直進筒、４は回転筒、
５は前進筒、６はカム筒、７はレンズ保持筒、８はレン
ズ、９はフレキシブルプリント基板（以下、ＦＰＣと略
称する）、１０はＦＰＣ押え板、１１は移動遮光板、１
２は遮光板駆動用バネである。First, in FIGS. 1 to 4 showing the configuration of a lens barrel of a zoom camera as an example to which the present invention is applied, 1
Is a camera body, 2 is a fixed barrel, 3 is a straight-moving barrel, 4 is a rotating barrel,
Reference numeral 5 is a forward cylinder, 6 is a cam cylinder, 7 is a lens holding cylinder, 8 is a lens, 9 is a flexible printed circuit board (hereinafter abbreviated as FPC), 10 is an FPC pressing plate, 11 is a movable light shielding plate, 1
Reference numeral 2 is a light shielding plate driving spring.
【００１２】カメラ本体１の内部に固定筒２が固定され
て、この固定筒２の内側に直進筒３が配置されている。
固定筒２にその軸線方向に沿った直進溝２ａが形成され
て、この直進溝２ａに、直進筒３の外周に形成した突出
部３ａが係合している。この直進筒３の内側には、回転
筒４、前進筒５、カム筒６が配置されており、さらに、
カム筒６の内側には、レンズ保持筒７が配置されてい
る。このレンズ保持筒７の内側にレンズ８が固定されて
いる。A fixed barrel 2 is fixed inside the camera body 1, and a straight-moving barrel 3 is arranged inside the fixed barrel 2.
A straight advancing groove 2a is formed in the fixed cylinder 2 along the axial direction thereof, and a projection 3a formed on the outer periphery of the straight advancing cylinder 3 is engaged with the straight advancing groove 2a. A rotary cylinder 4, a forward cylinder 5, and a cam cylinder 6 are arranged inside the straight-moving cylinder 3, and further,
A lens holding cylinder 7 is arranged inside the cam cylinder 6. A lens 8 is fixed inside the lens holding cylinder 7.
【００１３】以上の鏡筒は、回転筒４およびカム筒６の
回転によって、直進筒３および前進筒５が軸線方向に沿
って前後に移動するようになっている。さらに、カム筒
６の回転によって、レンズ保持筒７が前後に移動するよ
うになっている。このような鏡筒の駆動方法は、従来公
知の方法で行われるものであり、ここではその詳述を省
略する。In the above lens barrel, the rectilinear barrel 3 and the forward barrel 5 are moved back and forth along the axial direction by the rotation of the rotary barrel 4 and the cam barrel 6. Further, by rotating the cam barrel 6, the lens holding barrel 7 is moved back and forth. Such a method of driving the lens barrel is a conventionally known method, and a detailed description thereof will be omitted here.
【００１４】そして、固定筒２には、その軸線方向に沿
ったＦＰＣ収容溝２ｂが形成されて、このＦＰＣ収容溝
２ｂに、固定筒２と前進筒５とを接続するＦＰＣ９が収
容されている。即ち、途中でＵ字型に折り曲げた状態
で、一端が前進筒５に備える図示せぬシャッター機構な
どに接続されて、他端が固定筒２に接続されたＦＰＣ９
をＦＰＣ収容溝２ｂ内に収容して、このＦＰＣ収容溝２
ｂをＦＰＣ押え板１０によって外側から閉じている。An FPC accommodation groove 2b is formed in the fixed cylinder 2 along the axial direction thereof, and an FPC 9 for connecting the fixed cylinder 2 and the forward movement cylinder 5 is accommodated in the FPC accommodation groove 2b. . That is, in the state of being bent in the shape of a U in the middle, one end is connected to a shutter mechanism or the like (not shown) provided in the advancing cylinder 5, and the other end is connected to the fixed cylinder 2.
Is housed in the FPC housing groove 2b, and the FPC housing groove 2
b is closed from the outside by the FPC pressing plate 10.
【００１５】実施例では、このＦＰＣ９を鏡筒の周方向
の３箇所に設けており、従って、ＦＰＣ収容溝２ｂも３
本となっている。この３つのＦＰＣ９，９，９におい
て、少なくともその一つは、カメラ本体１と前進筒５の
シャッター機構などを電気的に接続する配線を有する
が、他は、電気的に接続する働きを持たないで力量的に
等価なダミーＦＰＣとしている。なお、この３つのＦＰ
Ｃ９，９，９とも電気的に接続する配線を有するもので
あっても勿論よい。In the embodiment, the FPCs 9 are provided at three positions in the circumferential direction of the lens barrel, so that the FPC receiving groove 2b is also three.
It is a book. At least one of the three FPCs 9, 9, 9 has wiring for electrically connecting the camera body 1 and the shutter mechanism of the forward movement barrel 5, and the other has no function of electrically connecting. Therefore, the dummy FPC is equivalently competent. In addition, these three FP
Of course, it may have wirings electrically connected to C9, 9, and 9.
【００１６】さらに、この３つのＦＰＣ９，９，９のＵ
字型をなす折り曲げ端部に当接するように環板状の移動
遮光板１１を配置している。この移動遮光板１１は、そ
の環板部の外周に周方向３箇所の突出片１１ａ，１１
ａ，１１ａを有しており、この突出片１１ａ，１１ａ，
１１ａを、固定筒２の周方向の３箇所に設けた直進溝２
ａ，２ａ，２ａにそれぞれ係合している。Further, the U of these three FPCs 9, 9, 9
A ring-shaped movable light-shielding plate 11 is arranged so as to come into contact with the bent end of the character shape. This movable light-shielding plate 11 has projecting pieces 11a, 11 at three locations in the circumferential direction on the outer periphery of its ring plate portion.
a, 11a, and these protruding pieces 11a, 11a,
Straight grooves 2 provided with 11a at three positions in the circumferential direction of the fixed cylinder 2.
a, 2a, 2a, respectively.
【００１７】そして、突出片１１ａ，１１ａ，１１ａか
ら延長したバネ係止片１１ｂ，１１ｂ，１１ｂと、固定
筒２の前部外周に起設したバネ係止ピン２ｃ，２ｃ，２
ｃとの間に、移動遮光板１１の環板部をＦＰＣ９，９，
９の折り曲げ端部に常時当接させるに必要十分な弱い引
張コイルバネによる遮光板駆動用バネ１２，１２，１２
をそれぞれ張設している。Then, the spring locking pieces 11b, 11b, 11b extending from the projecting pieces 11a, 11a, 11a and the spring locking pins 2c, 2c, 2 provided on the outer periphery of the front portion of the fixed cylinder 2 are provided.
The ring plate portion of the movable light shielding plate 11 is connected to the FPCs 9, 9,
Light-shielding plate drive springs 12, 12, 12 by a weak tension coil spring that is necessary and sufficient for always contacting the bent end of 9
Are stretched respectively.
【００１８】このような構成の鏡筒内内面反射防止装置
によれば、変倍（ズーム）動作により固定筒２に対し前
進筒５が前後に移動すると、３つのＦＰＣ９，９，９の
Ｕ字型をなす折り曲げ端部に当接する移動遮光板１１
は、その遮光板駆動用バネ１２，１２，１２の力により
前進筒５の半分の距離を移動するため、有害光線をカッ
トする。According to the internal reflection preventing device for a lens barrel having such a structure, when the forward moving barrel 5 moves back and forth with respect to the fixed barrel 2 due to the zooming operation, the three FPCs 9, 9, 9 are U-shaped. A movable light-shielding plate 11 that abuts the bent end of the mold
Moves the half distance of the advancing barrel 5 by the force of the light shielding plate driving springs 12, 12, 12 and cuts harmful rays.
【００１９】即ち、図５から図７にかけて（ａ），
（ｂ），（ｃ），（ｄ），（ｅ），（ｆ）で変倍動作状
態をそれぞれ示したように、移動遮光板１１が前進筒５
の動きの常に半部の動きをして、有効光線１３に対し、
一定の間隔をもって移動遮光板１１が動くため、例え
ば、図５（ａ）および図６（ｃ）に示したように、有害
光線１４が鏡筒（固定筒２）の内面に反射しようとする
のを移動遮光板１１により効果的に防止できる。That is, (a) from FIG. 5 to FIG.
As shown in (b), (c), (d), (e), and (f) of the variable magnification operation state, the movable light-shielding plate 11 is moved to the forward barrel 5.
The movement of half of the movement of
Since the movable light shielding plate 11 moves at a constant interval, for example, as shown in FIGS. 5 (a) and 6 (c), harmful rays 14 tend to be reflected on the inner surface of the lens barrel (fixed barrel 2). Can be effectively prevented by the moving light shielding plate 11.
【００２０】なお、以上の実施例においては、遮光板の
安定支持のためにダミーを含む３つのＦＰＣとしたが、
本発明はこれに限定されるものではなく、４つ以上のＦ
ＰＣであってもよい。また、遮光板の材質やバネの種類
等も任意であり、例えば、引張コイルバネに代えて圧縮
コイルバネを使用することも可能であり、その他、具体
的な細部構造等についても適宜に変更可能であることは
勿論である。In the above embodiment, the three FPCs including the dummy are provided for the stable support of the light shield plate.
The present invention is not limited to this, and four or more F
It may be a PC. Further, the material of the light shielding plate, the type of spring, and the like are arbitrary, and for example, a compression coil spring can be used instead of the tension coil spring, and other specific detailed structures can be appropriately changed. Of course.
【００２１】[0021]
【発明の効果】以上のように、本発明に係るズームカメ
ラの鏡筒内内面反射防止装置によれば、変倍動作の際の
フレキシブルプリント基板の移動に追従して、その折り
曲げ端部に接しながら遮光板が移動し、即ち、シャッタ
ー機構等が設けられた前進筒などの動きの約半部の動き
を遮光板がするため、有効光線に対し、ほぼ一定の間隔
をもって動くことにより、有害な内面反射を効果的に防
止することができる。しかも、移動遮光板であるため、
鏡筒をコンパクトに構成できる。As described above, according to the inner reflection preventing device for a lens barrel of the zoom camera according to the present invention, the flexible printed circuit board is moved along with the movement of the flexible printed circuit board during the zooming operation, and the flexible printed circuit board is brought into contact with the bent end portion thereof. However, since the shading plate moves, that is, the shading plate moves about half of the movement of the forward movement cylinder or the like provided with the shutter mechanism, etc. Internal reflection can be effectively prevented. Moreover, because it is a moving light shield,
The lens barrel can be made compact.
【００２２】なお、請求項２記載のように、遮光板をフ
レキシブルプリント基板の折り曲げ端部に当接する方向
に付勢するバネを設けることにより、遮光板の駆動が行
える。As described in claim 2, the light shielding plate can be driven by providing a spring for urging the light shielding plate in a direction in which the light shielding plate is brought into contact with the bent end portion of the flexible printed circuit board.
【図１】本発明を適用した一例としてのズームカメラの
鏡筒の構成を示す概略斜視図である。FIG. 1 is a schematic perspective view showing a configuration of a lens barrel of a zoom camera as an example to which the present invention is applied.
【図２】図１の矢印Ｉ−Ｉ線に沿った断面図である。2 is a cross-sectional view taken along the line II of FIG.
【図３】図１の矢印ＩＩ−ＩＩ線に沿った半部断面図で
ある。3 is a half sectional view taken along the line II-II in FIG.
【図４】図１の矢印ＩＩＩ−ＩＩＩ線に沿った半部断面
図である。FIG. 4 is a half sectional view taken along the line III-III in FIG.
【図５】鏡筒の変倍状態の態様を示すもので、（ａ）は
テレスコープ状態の半部縦断側面図、（ｂ）はテレスコ
ープ状態より短くした状態の半部縦断側面図である。5A and 5B are views showing a mode in which the lens barrel is in a variable magnification state, wherein FIG. 5A is a half-section vertical side view in a telescope state, and FIG. 5B is a half-section vertical side view in a state shorter than the telescope state. .
【図６】同じく鏡筒の変倍状態の態様を示すもので、
（ｃ）は図５（ｂ）の状態より短くした状態の半部縦断
側面図、（ｄ）は（ｃ）の状態よりさらに短くした状態
の半部縦断側面図である。FIG. 6 is also a view showing a mode of a variable magnification state of the lens barrel,
FIG. 5C is a side view of the half part longitudinally cut in a state shorter than that of FIG. 5B, and FIG. 5D is a side view of the half part longitudinally made shorter than the state of FIG. 5C.
【図７】同じく鏡筒の変倍状態の態様を示すもので、
（ｅ）は図６（ｄ）の状態より短くしたワイド状態の半
部縦断側面図、（ｆ）は（ｅ）の状態よりさらに短くし
た沈胴状態の半部縦断側面図である。FIG. 7 is a view showing a mode in which the lens barrel is in a variable magnification state.
FIG. 6E is a side view of a half section in a wide state, which is shorter than the state in FIG. 6D, and FIG. 6F is a side view of a half section in a retracted state, which is shorter than the state in FIG. 6E.
１ カメラ本体 ２ 固定筒 ２ａ 直進溝 ２ｂ ＦＰＣ収容溝 ２ｃ バネ係止ピン ３ 直進筒 ３ａ 突出部 ４ 回転筒 ５ 前進筒 ６ カム筒 ７ レンズ保持筒 ８ レンズ ９ フレキシブルプリント基板（ＦＰＣ） １０ ＦＰＣ押え板 １１ 移動遮光板 １１ａ 突出片 １１ｂ バネ係止片 １２ 遮光板駆動用バネ １３ 有効光線 １４ 有害光線 1 camera body 2 fixed barrel 2a straight advance groove 2b FPC accommodation groove 2c spring locking pin 3 straight advance barrel 3a protruding portion 4 rotary barrel 5 forward barrel 6 cam barrel 7 lens holding barrel 8 lens 9 flexible printed circuit board (FPC) 10 FPC retainer plate 11 Moving Light-shielding Plate 11a Projecting Piece 11b Spring Locking Piece 12 Light-shielding Plate Driving Spring 13 Effective Light Ray 14 Harmful Light Ray
Claims (2)
を接続するフレキシブルプリント基板を有するズームカ
メラにおいて、 前記フレキシブルプリント基板を前記鏡筒の周方向の少
なくとも３箇所に折り曲げ状態で設け、 前記鏡筒内の内面反射を防止する遮光板を、変倍動作の
際の前記フレキシブルプリント基板の移動に追従して、
そのフレキシブルプリント基板の折り曲げ端部に接する
よう移動可能に組み付けてなることを特徴とするズーム
カメラの鏡筒内内面反射防止装置。1. A zoom camera having a flexible printed circuit board for connecting a camera body and a shutter mechanism in a lens barrel, wherein the flexible printed circuit board is provided in a bent state at at least three positions in a circumferential direction of the lens barrel. A light-shielding plate that prevents internal reflection inside the cylinder, following the movement of the flexible printed circuit board during zooming,
An internal reflection preventing device for a lens barrel of a zoom camera, wherein the flexible printed circuit board is movably assembled so as to come into contact with a bent end of the flexible printed circuit board.
基板の折り曲げ端部に当接する方向に付勢するバネを設
けたことを特徴とする請求項１記載のズームカメラの鏡
筒内内面反射防止装置。2. The internal reflection preventing device for a lens barrel of a zoom camera according to claim 1, further comprising a spring for urging the light-shielding plate in a direction in which the light-shielding plate abuts on a bent end of the flexible printed circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20925693A JP3447013B2 (en) | 1993-08-24 | 1993-08-24 | Anti-reflection device inside lens barrel of zoom camera |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20925693A JP3447013B2 (en) | 1993-08-24 | 1993-08-24 | Anti-reflection device inside lens barrel of zoom camera |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0763969A true JPH0763969A (en) | 1995-03-10 |
| JP3447013B2 JP3447013B2 (en) | 2003-09-16 |
Family
ID=16569947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20925693A Expired - Lifetime JP3447013B2 (en) | 1993-08-24 | 1993-08-24 | Anti-reflection device inside lens barrel of zoom camera |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3447013B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006047747A (en) * | 2004-08-05 | 2006-02-16 | Nitto Kogaku Kk | Lens barrel |
| JP2006091311A (en) * | 2004-09-22 | 2006-04-06 | Casio Comput Co Ltd | Zoom lens barrel and digital camera using the same |
| US8275255B2 (en) | 2009-07-24 | 2012-09-25 | Panasonic Corporation | Lens barrel and imaging device |
| US8471957B2 (en) | 2009-07-24 | 2013-06-25 | Panasonic Corporation | Lens barrel with supporting flames and imaging device |
| JP2019152781A (en) * | 2018-03-05 | 2019-09-12 | 株式会社シグマ | Lens barrel |
-
1993
- 1993-08-24 JP JP20925693A patent/JP3447013B2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006047747A (en) * | 2004-08-05 | 2006-02-16 | Nitto Kogaku Kk | Lens barrel |
| JP4583102B2 (en) * | 2004-08-05 | 2010-11-17 | 日東光学株式会社 | Tube |
| JP2006091311A (en) * | 2004-09-22 | 2006-04-06 | Casio Comput Co Ltd | Zoom lens barrel and digital camera using the same |
| US8275255B2 (en) | 2009-07-24 | 2012-09-25 | Panasonic Corporation | Lens barrel and imaging device |
| US8471957B2 (en) | 2009-07-24 | 2013-06-25 | Panasonic Corporation | Lens barrel with supporting flames and imaging device |
| JP2019152781A (en) * | 2018-03-05 | 2019-09-12 | 株式会社シグマ | Lens barrel |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3447013B2 (en) | 2003-09-16 |
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