JPH0264908U

JPH0264908U -

Info

Publication number: JPH0264908U
Application number: JP14309388U
Authority: JP
Priority date: 1988-11-01
Filing date: 1988-11-01
Publication date: 1990-05-16
Anticipated expiration: 2003-11-01
Also published as: JPH0736334Y2

Description

[Brief explanation of drawings]

第１図は、本考案の第１実施例を示すレンズ鏡
筒の要部断面図、第２図は、上記第１実施例にお
ける移動量検出手段の部分平面図、第３図は、本
考案の第２実施例を示すレンズ鏡筒の要部断面図
、第４図は、上記第２実施例における移動量検出
手段の要部展開平面図、第５図は、従来のレンズ
鏡筒を示す要部断面図、第６図は、上記第５図の
レンズ鏡筒におけるカム溝孔およびガイド溝孔の
展開平面図である。２１，３１……固定枠、２２，３２……移動枠
、２６，３３……着磁部、２８，３４……磁気変
換素子。 FIG. 1 is a sectional view of a main part of a lens barrel showing a first embodiment of the present invention, FIG. 2 is a partial plan view of the movement amount detecting means in the first embodiment, and FIG. FIG. 4 is a developed plan view of the main portion of the movement amount detection means in the second embodiment, and FIG. 5 shows a conventional lens barrel. The principal part sectional view, FIG. 6, is a developed plan view of the cam slot and the guide slot in the lens barrel shown in FIG. 5. 21, 31... Fixed frame, 22, 32... Moving frame, 26, 33... Magnetized section, 28, 34... Magnetic conversion element.

Claims

[Scope of Claim for Utility Model Registration] A fixed frame; a movable frame that is fitted into the fixed frame and moves forward and backward in the optical axis direction by being rotated relative to the fixed frame; and the movement of the fixed frame. A magnetic transducer element which is a fitting surface with the frame and is held so as to face the movable frame, and a surface of the movable frame which is always opposed to the magnetic transducer element and which is held so as to face the movable frame. A lens barrel characterized by comprising: a magnetized part provided so that a magnetic pattern changes along a movement locus of a moving frame;