JPH0298321U

JPH0298321U -

Info

Publication number: JPH0298321U
Application number: JP712189U
Authority: JP
Priority date: 1989-01-24
Filing date: 1989-01-24
Publication date: 1990-08-06

Description

[Brief explanation of drawings]

第１図は本考案によるズームレンズの位置制御
装置の一例を示す全体の構成図、第２図は本実施
例におけるモータ回転数検知用パルス発生器の一
例を示す構成図、第３図は本実施例におけるズー
ムレンズ位置検出制御の手順を示すフローチヤー
ト、第４図は本考案におけるモータ回転数検知用
パルス発生手段の他の実施例を示す構成図、第５
図は本考案によるズームレンズ系の他の実施例を
示す構成図、第６図は従来のズームレンズ位置制
御装置の構成図である。尚、図中、１はカム環、２はレンズ枠、３は歯
車、４はモータ、５は駆動歯車、１１はモータ回
転数検知用パルス発生器、１２はアツプ／ダウン
カウンタ、１３は原点検知用スイツチ、１４はエ
ンドスイツチ、１５はレンズ位置制御部、１６は
モータ正転用スイツチ、１７はモータ逆転用スイ
ツチである。 FIG. 1 is an overall configuration diagram showing an example of a zoom lens position control device according to the present invention, FIG. 2 is a configuration diagram showing an example of a pulse generator for motor rotation speed detection in this embodiment, and FIG. FIG. 4 is a flowchart showing the procedure of zoom lens position detection control in the embodiment; FIG.
This figure is a block diagram showing another embodiment of the zoom lens system according to the present invention, and FIG. 6 is a block diagram of a conventional zoom lens position control device. In addition, in the figure, 1 is a cam ring, 2 is a lens frame, 3 is a gear, 4 is a motor, 5 is a drive gear, 11 is a pulse generator for motor rotation speed detection, 12 is an up/down counter, and 13 is an origin detection 14 is an end switch, 15 is a lens position control section, 16 is a motor forward rotation switch, and 17 is a motor reverse rotation switch.

Claims

[Claims for Utility Model Registration] A cam ring that is rotated in forward and reverse directions by a motor; a lens frame that is fitted within the cam ring and that is moved forward and backward by the forward and reverse rotation of the cam ring; a pulse generating means for detecting a motor rotation speed that generates proportional pulses; a counting means that counts the pulses from the pulse generating means; an origin detection switch that detects the backward end position of the lens frame as the origin; and the lens. an end switch that detects the forward end position of the frame, and controls forward, reverse, and stop the motor based on on/off signals of the origin detection switch and end switch, and switch signals of the motor forward/reverse switch, and performs the counting. A zoom lens position control device comprising: a control unit that calculates the position of a lens frame based on the counting contents of the means;