JPS6438610U

JPS6438610U -

Info

Publication number: JPS6438610U
Application number: JP13499987U
Authority: JP
Priority date: 1987-09-03
Filing date: 1987-09-03
Publication date: 1989-03-08

Description

[Brief explanation of the drawing]

第１図は本考案の実施例を示すカメラの撮影レ
ンズ鏡筒の断面図で、副レンズ系が撮影光軸上か
ら退避した広角状態を示し、第２図は第１図の実
施例において副レンズ系が撮影光軸上に挿入され
た望遠状態を示す断面図であり、第３図はキーと
キー溝との係合状態を示す上面図である。主要部分の符号の説明、２……回動部材、｛６
……直進鏡筒、７……取付け基板、１０……シヤ
ツタ制御装置、１１……レンズ系移動装置、１３
……主レンズ枠｝１６……保持部材、１７……キ
ー、１７Ａ，１７Ｂ……突出部、１８……キー溝
、Ｌ_１……主レンズ系、Ｌ_２……副レンズ系。 FIG. 1 is a cross-sectional view of the photographing lens barrel of a camera showing an embodiment of the present invention, showing a wide-angle state in which the sub-lens system is retracted from the photographing optical axis. FIG. 3 is a sectional view showing a telephoto state in which the lens system is inserted on the photographing optical axis, and FIG. 3 is a top view showing a state in which the key and the key groove are engaged. Explanation of symbols of main parts, 2...Rotating member, {6
... Straight lens barrel, 7 ... Mounting board, 10 ... Shutter control device, 11 ... Lens system moving device, 13
...Main lens frame}16...Holding member, 17...Key, 17A, 17B...Protrusion, 18...Keyway, _L1 ...Main lens system, _L2 ...Sub-lens system.

Claims

[Claims for Utility Model Registration] A holding member that holds a photographic lens and has a first helicoid carved around the optical axis of the lens; a second helicoid that is threadedly engaged with the first helicoid; a rotating member coupled to the lens holding member through the screwing of both helicoids and rotatably supported by the camera body about the optical axis; the holding member and the camera body; a key extending in the optical axis direction provided on one of the holding members; and a key provided on the other of the holding member and the camera body;
a key groove in which the key engages, the rotation of the holding member is prevented by engagement between the key and the key groove, and the holding member is rotated in response to the rotation of the rotating member. In a photographic lens barrel of a camera that is moved linearly in the optical axis direction, the holding member is set at a predetermined position by the linear movement during photographing, and when in the predetermined position, the key and the key groove are engaged with each other without a gap. A photographing lens barrel for a camera, wherein the key and the key groove engage with each other with a gap when the key is in a position other than the predetermined position.