JPH0352710U

JPH0352710U -

Info

Publication number: JPH0352710U
Application number: JP11400189U
Authority: JP
Priority date: 1989-09-28
Filing date: 1989-09-28
Publication date: 1991-05-22
Anticipated expiration: 2004-09-28
Also published as: JPH089692Y2

Description

[Brief explanation of drawings]

第１図は本考案を適用したＣＣＴＶカメラ用レ
ンズ鏡胴の一実施例の要部の側断面図であり、第
２図は本考案を適用した他の一実施例を示す側断
面図であり、第３図は可視光用補正枠に赤外カツ
トフイルターを組込んだ要部の側断面図である。１……固定鏡胴、１ａ……マウントネジ、１ｂ
……案内穴、１Ｄ……インロー径、１ｍ……当付
面、１ｕ……当付面、２……操作軸、３……操作
部材、３ｕ……端面、４……鏡筒、４Ｄ……イン
ロー径、４ａ……案内溝、５……板バネ、６……
直進案内キー、７……ピント調整ナツト、８……
飾枠、８ａ……内側壁、９……直進ガイドビス、
１０……可視光用補正枠。 FIG. 1 is a side sectional view of a main part of an embodiment of a CCTV camera lens barrel to which the present invention is applied, and FIG. 2 is a side sectional view showing another embodiment to which the present invention is applied. , FIG. 3 is a side sectional view of the main part of the visible light correction frame incorporating the infrared cut filter. 1...Fixed lens barrel, 1a...Mount screw, 1b
...Guide hole, 1D...Pilot diameter, 1m...Abutting surface, 1u...Abutting surface, 2...Operating shaft, 3...Operating member, 3u...End face, 4... Lens barrel, 4D... ... Pilot diameter, 4a... Guide groove, 5... Leaf spring, 6...
Straight guide key, 7...Focus adjustment nut, 8...
Decorative frame, 8a...inner wall, 9...straight guide screw,
10... Visible light correction frame.

Claims

[Scope of Claim for Utility Model Registration] (1) A lens barrel for optical equipment that performs focusing operations by rotating an operating member for focusing operations that protrudes partially from the exterior member of the lens barrel. The operation shaft 2 having a linear movement function is fitted into the lens barrel 4 of the optical system holding member, the operation member 3 is screwed onto the operation shaft 2, and the focus adjustment nut 7 is screwed together. The lens barrel 4 is connected to the fixed lens barrel 1 attached to the main body of the device via a straight-advancing mechanism, and at the same time, the leaf spring 5 is held between the lens barrel 4 and the fixed lens barrel 1, and the repulsive force of the leaf spring 5 causes The spring is always pressed in the direction of narrowing the distance between the lens barrel 4 and the fixed lens barrel 1, and the end surface of the operating shaft 2 is in contact with the fixed lens barrel 1, and the screwed focus adjustment nut 7 is The end face is held so that it touches the inner wall 8a of the decorative frame 8 fixed to the lens barrel 4, and by rotating the focus adjustment nut 7, the optical system can be focused at the infinity position, and the infinity position can be adjusted. Regarding lens extension due to changes in shooting distance other than position,
A focusing device for a lens barrel for an optical instrument, characterized in that a focusing operation is performed by rotation of an operating member 3 using the thrust of a screw and the repulsive force of a plate spring. (2) Scope of Utility Model Registration In the device described in claim (1), when photographing in the visible light range, the visible light correction frame 10 is used, and when the visible light correction frame 10 is removed, the photograph is taken. The dimension l of the pin adjustment nut 7 is set based on the dimension L of the visible light correction frame 10 and the correction amount Δx of the photographing wavelength range so that the focus position is automatically corrected for different wavelength ranges. A focusing device for lens barrels for optical instruments.