JPH0343601U - - Google Patents

Description

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

図面はこの考案に係る初期焦点調節機構の好ま
しい実施例を示すものである。第１図は、光軸を
含む垂直面で切断した一部省略断面図である。第
２図は第１図における−線に沿つて切断した
一部断面図、第３図は調節ナツトの正面図、第４
図はフリクシヨンワツシヤの正面図である。第５
図は第２の実施例を示すもので、要部の光軸方向
の断面図である。第６図は第３の実施例を示すも
ので、第５図に相当する、要部の光軸方向の断面
図である。第７図および第８図は、二焦点カメラ
の概略を説明するための図で、光軸を含む水平面
で切断した断面図であり、第７図はワイド撮影時
を、第８図はテレ撮影時をそれぞれ示している。 ２……前群レンズ、４……後群レンズ、６……
移動鏡筒、６ａ……壁部、６ｂ……蓋体、８……
カメラ本体、１０……固定鏡筒、１６……前群レ
ンズ保持部材、２０……後群レンズ保持部材、２
０ａ……フオーク部、２０ｄ……接着剤充填孔、
２２……回動軸、２２ａ……雄ネジ部、２４……
後群レンズ調節部材、３０……調節ナツト（調節
部材）、３２……フリクシヨンワツシヤ、３４…
…駆動バネ、３６……板バネ、４２……回動軸、
４４……調節ナツト（調節部材）、４６……後群
レンズ保持部材、４８……蓋体、５２……回動軸
、５４……調節ナツト（調節部材）、５６……後
群レンズ保持部材、５８……蓋体、６０……押し
バネ。 The drawings show a preferred embodiment of the initial focus adjustment mechanism according to the invention. FIG. 1 is a partially omitted sectional view taken along a vertical plane including the optical axis. Figure 2 is a partial sectional view taken along the - line in Figure 1, Figure 3 is a front view of the adjustment nut, and Figure 4 is a front view of the adjustment nut.
The figure is a front view of the friction washer. Fifth
The figure shows the second embodiment, and is a sectional view of the main part in the optical axis direction. FIG. 6 shows a third embodiment, and is a sectional view of the main part in the optical axis direction, corresponding to FIG. 5. Figures 7 and 8 are diagrams for explaining the outline of a bifocal camera, and are cross-sectional views taken along a horizontal plane that includes the optical axis. Figure 7 is for wide shooting, and Figure 8 is for telephoto shooting. Each shows the time. 2...Front group lens, 4...Rear group lens, 6...
Movable lens barrel, 6a...wall, 6b...lid, 8...
Camera body, 10... Fixed lens barrel, 16... Front group lens holding member, 20... Rear group lens holding member, 2
0a...fork part, 20d...adhesive filling hole,
22...Rotation shaft, 22a...Male thread part, 24...
Rear group lens adjustment member, 30... Adjustment nut (adjustment member), 32... Friction washer, 34...
... Drive spring, 36 ... Leaf spring, 42 ... Rotation shaft,
44...Adjustment nut (adjustment member), 46...Rear group lens holding member, 48...Lid, 52...Rotation shaft, 54...Adjustment nut (adjustment member), 56...Rear group lens holding member , 58...lid body, 60...pressing spring.

Claims (1)

【実用新案登録請求の範囲】 複数の撮影レンズを有し、これら複数の撮影レ
ンズの適宜なものを光路中に位置付かせ、あるい
は光路中から退避させることにより焦点距離を変
更する可変焦点装置付きカメラであつて、上記撮
影レンズの光路中への進入動作と光路中からの退
避動作が回動軸を中心とした光軸方向平面内での
該撮影レンズの旋回により行なわれ、該撮影レン
ズを光軸方向に移動させることによつて初期の基
準ピント調節を行なう可変焦点装置付きカメラの
初期焦点調節機構において、 前記撮影レンズの回動軸に雄ネジ部を形成し、
該雄ネジ部と螺合して、上記回動軸の回転により
あるいはそれ自体の回転によつて該雄ネジ部に沿
つて進退する調節部材を設け、上記撮影レンズの
レンズ保持部材を上記回動軸に設けるとともに該
調節部材に連繋して光軸方向に移動自在とし、上
記調節部材の進退により基準のピント調節を行な
うようにしたことを特徴とする可変焦点装置付き
カメラの初期焦点調節機構。[Claims for Utility Model Registration] Equipped with a variable focus device that has a plurality of taking lenses and changes the focal length by positioning or withdrawing appropriate ones of the plurality of taking lenses from the optical path. In the camera, the movement of the photographic lens into the optical path and the movement of the photographic lens into the optical path are performed by rotating the photographic lens within a plane in the optical axis direction about a rotation axis, and the photographic lens is In the initial focus adjustment mechanism of a camera with a variable focus device that performs initial reference focus adjustment by moving in the optical axis direction, a male screw portion is formed on the rotation axis of the photographic lens,
An adjustment member is provided which is screwed into the male threaded portion and moves forward and backward along the male threaded portion by rotation of the rotation shaft or by rotation of itself, and the lens holding member of the photographing lens is rotated. An initial focus adjustment mechanism for a camera with a variable focus device, characterized in that it is provided on a shaft and is movable in the optical axis direction in conjunction with the adjustment member, and a reference focus adjustment is performed by moving the adjustment member back and forth.