JPS60193513U

JPS60193513U - Lens position detection device

Info

Publication number: JPS60193513U
Application number: JP7938684U
Authority: JP
Inventors: 佐々木　豊徳; 正明高木; 正男武藤
Original assignee: 日本電産コパル株式会社
Priority date: 1984-05-31
Filing date: 1984-05-31
Publication date: 1985-12-23
Also published as: JPH0441282Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は、従来のレンズ位置検出装置に適用されている
チャタリング防止回路の一例を示した回路図、第２図は
本考案に係るレンズ位置検出装置の一実施例を示した回
路図、第３図ａおよびｂは各々第２図に示すチャタリン
グ防止回路の入力波形および出力波形を示した波形図で
ある。１０・・・・・・摺動スイッチ、１１．１２・・・・・
・電極、１３・・・・・・出力用電極、１４・・・・・
・接触子、２０・・・・・・チャタリング防止回路、２
１．２２・・・・・・比較回路、２３．　２４−−−−
−−スイッチングトランジスタ、３０・・・・・・カウ
ンタ。FIG. 1 is a circuit diagram showing an example of a chattering prevention circuit applied to a conventional lens position detection device, and FIG. 2 is a circuit diagram showing an example of a lens position detection device according to the present invention. 3A and 3B are waveform diagrams showing the input waveform and output waveform of the chattering prevention circuit shown in FIG. 2, respectively. 10...Sliding switch, 11.12...
・Electrode, 13...Output electrode, 14...
・Contactor, 20...Chattering prevention circuit, 2
1.22... Comparison circuit, 23. 24---
--Switching transistor, 30... Counter.

Claims

[Claims for Utility Model Registration] 1. First and second electrodes functioning as both terminals of a power source;
a contact that alternately contacts the first and second electrodes as the lens moves, and an output electrode that is contacted by the contact;
first and second switching elements interposed between the first and second electrodes, respectively, and outputting a corresponding voltage level signal by inputting the voltage level signal of the output electrode; circuit means for making the first and second switching elements conductive when selected so that the voltage before the non-contact state is maintained at the input section when a contact is made, and a signal formed by a change in the output voltage of this circuit means is counted. A lens position detection device comprising: means for detecting the position of a lens. 2. The first and second switching elements are each transistors, and the circuit means is configured to output voltage level signals at both terminals of the power source. , a utility model configured to forward bias between the base and emitter of the second switch element, and to provide a conduction condition to the switch element on the forward biased side when the contactor is not in contact. A lens position detection device according to registered claim 1. 3. The lens position detection device according to claim 1 or 2, wherein the first and second electrodes are disposed facing each other in a comb-teeth shape in a non-contact manner.