JPS61118160U

JPS61118160U -

Info

Publication number: JPS61118160U
Application number: JP154985U
Authority: JP
Priority date: 1985-01-10
Filing date: 1985-01-10
Publication date: 1986-07-25
Also published as: JPH0424531Y2

Description

[Brief explanation of drawings]

第１図は本考案の実施例のブロツク線図、第２
図はピツクアツプの駆動系の構成を示す斜視図、
第３図はマイクロプロセツサ１の処理内容の一部
を示すフローチヤートである。１はマイクロプロセツサ、２は操作部、３はメ
モリ、４は入力部、５は出力部、６はコンパクト
デイスク、７はデイスクモータ、８は原点スイツ
チ、９はピツクアツプ、１０は半導体レーザ、１
１，１４，１５はレンズ、１２はビームスプリツ
タ、１３は１／４波長板、１６はデイテクタ、１
７はマトリクス回路、１８はフオーカスサーボ回
路、１９はトラツキングサーボ回路、２０はフオ
ーカスコイル、２１はトラツキングコイル、２２
は復調回路、２３は回転制御回路、２４は信号処
理回路、２５はＤＡ変換器、２６はローパスフイ
ルタ、２７は増幅器、２８はスピーカ、２９はフ
イードモータ制御回路、３０はフイードモータ、
３１は送りねじ、３２，３３は歯車、３４はシヤ
ーシ、３５は案内軸、３６はターンテーブルであ
る。 Figure 1 is a block diagram of an embodiment of the present invention;
The figure is a perspective view showing the configuration of the pickup drive system.
FIG. 3 is a flowchart showing part of the processing contents of the microprocessor 1. 1 is a microprocessor, 2 is an operating section, 3 is a memory, 4 is an input section, 5 is an output section, 6 is a compact disk, 7 is a disk motor, 8 is an origin switch, 9 is a pick-up, 10 is a semiconductor laser, 1
1, 14, 15 are lenses, 12 is a beam splitter, 13 is a quarter wavelength plate, 16 is a detector, 1
7 is a matrix circuit, 18 is a focus servo circuit, 19 is a tracking servo circuit, 20 is a focus coil, 21 is a tracking coil, 22
is a demodulation circuit, 23 is a rotation control circuit, 24 is a signal processing circuit, 25 is a DA converter, 26 is a low-pass filter, 27 is an amplifier, 28 is a speaker, 29 is a feed motor control circuit, 30 is a feed motor,
31 is a feed screw, 32 and 33 are gears, 34 is a chassis, 35 is a guide shaft, and 36 is a turntable.

Claims

[Claims for Utility Model Registration] A pick-up for converting reflected light from a compact disk into an electrical signal; a reproducing means for reproducing the stored contents of the compact disk based on the electrical signal from the pick-up; In a compact disc player equipped with a feed motor that moves the disc in the radial direction, and an origin switch that detects that the pick-up has returned to the origin, the feed motor is controlled by a origin return command that returns the pick-up to the origin. a timer that starts measurement in response to the origin return command; and a timer that starts measurement when the origin switch detects that the pickup has returned to the origin, or when the measurement time by the timer is determined in advance. A compact disc player characterized by comprising: a stop means for also stopping the feed motor when a predetermined time has elapsed.