JPS6035364U

JPS6035364U - Record size detection device

Info

Publication number: JPS6035364U
Application number: JP12797883U
Authority: JP
Inventors: 高橋　博行
Original assignee: パイオニア株式会社
Priority date: 1983-08-19
Filing date: 1983-08-19
Publication date: 1985-03-11

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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来のレコード盤サイズ検出装置のブロック図
、第２図はこの考案のレコード盤サイズ検出装置の一実
施例の構成を示すブロック図、第３図ｇないし第３図ｇ
はそれぞれ同上レコード盤サイズ検出装置の動作を説明
するための波形図である。１１・・・・・・レーベルセンサ、１２・・・・・・増
幅器、１３・・・・・・コンパレータ、１４・・・・・
・処理回路、１５・・・・・・位置センサ、１６・・・
・・・波形整形回路、１００・・・・・・レーベル部検
出信号発生回路、２００・・・・・・位置検出部。FIG. 1 is a block diagram of a conventional record size detection device, FIG. 2 is a block diagram showing the configuration of an embodiment of the record size detection device of this invention, and FIGS. 3g to 3g.
are waveform diagrams for explaining the operation of the record disc size detection device, respectively. 11... Label sensor, 12... Amplifier, 13... Comparator, 14...
・Processing circuit, 15...Position sensor, 16...
. . . Waveform shaping circuit, 100 . . . Label section detection signal generation circuit, 200 . . . Position detection section.

Claims

[Scope of utility model registration request]

(1) Taking advantage of the fact that the size of the label section of a record is standardized by the record size, optical detection means detects the reflected light from the record surface that passes over the label section, and determines the size of each record. a label portion detection signal generation circuit portion that generates a label portion detection signal by comparing the label portion detection signal with a threshold level of the label portion detection signal, and a position detection portion that detects the position of the optical detection means in conjunction with the optical detection means;
A record disc size detection device comprising a processing circuit that determines the size of a record disc based on the position detection unit and the output of the label detection signal generation circuit unit.

(2) A record disc size detecting device according to claim 1, wherein the optical detecting means shares a photosensor in a record player having an automatic channel selection function.