JPS5890538U

JPS5890538U - signal detection circuit device

Info

Publication number: JPS5890538U
Application number: JP18562081U
Authority: JP
Inventors: 松田　豊司; 大塩　昭
Original assignee: Toshiba Corp
Current assignee: Toshiba Corp
Priority date: 1981-12-11
Filing date: 1981-12-11
Publication date: 1983-06-18

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 the drawing]

第１図はビデオディスクプレーヤーにおけるピックアッ
プアームの動作概要を説明するための概略図、第２図は
ピックアップアームの内部装置の一概略を説明する分解
斜視図、第３図！ま第２図の実体的配線を電気回路に変
換した回路図、第４図はカンチレバーの先端付近を詳細
に示す斜視図、第５図は本考案の信号検出回路装置を水
子分解斜視　　・図、第６図は本考案の一実施例に使用
するアーム筐体を示す斜視図である。２１・・・・・・カートリッジ、２５・・・・・・カン
チレバー、２８・・・・・・フライリード、２９・・・
・・・接点鋲、３０・・・・・・印刷配線板、３１・・
・・・・接点用ビス、３２・・・・・・サ　一ボ回路部
、３３・・・・・・発振器部、３４Ａ、３４Ｂ。３８Ａ、３８Ｂ、４２．４２’　、４４．４４’・・・
・・・リード端子、３５．３７・・・・・・キクカーコ
イル、３６．４０・・・・・・第１、第２の棒電極、３
９・・・・・・回路パターン、４３Ａ乃至４３Ｄ・・・
・・・貫通コンデンサ、４６・・・・・・アーム筐体（
アーム）、４７・・・・・・透孔、ＣＤ、、　ＣＤ２・
・・・・・可変容量ダイオード、Ｒ□、Ｒ２・・・・・
・抵抗。Fig. 1 is a schematic diagram for explaining the general operation of a pickup arm in a video disc player, Fig. 2 is an exploded perspective view for explaining an outline of the internal device of the pickup arm, and Fig. 3! Figure 2 is a circuit diagram in which the physical wiring is converted into an electric circuit, Figure 4 is a perspective view showing the vicinity of the tip of the cantilever in detail, and Figure 5 is a water molecule exploded perspective view of the signal detection circuit device of the present invention. , FIG. 6 is a perspective view showing an arm housing used in an embodiment of the present invention. 21... Cartridge, 25... Cantilever, 28... Fly lead, 29...
...Contact stud, 30...Printed wiring board, 31...
...Contact screw, 32...Sabot circuit section, 33...Oscillator section, 34A, 34B. 38A, 38B, 42.42', 44.44'...
...Lead terminal, 35.37...Kikuka coil, 36.40...First and second rod electrodes, 3
9...Circuit pattern, 43A to 43D...
...Feedthrough capacitor, 46...Arm housing (
Arm), 47...Through hole, CD,, CD2・
...Variable capacitance diode, R□, R2...
·resistance.

Claims

[Scope of utility model registration request]

(1) The electrostatic capacitance generated between the surface of the disk on which the signal is recorded and the reproducing needle at the tip of the cantilever becomes part of the resonant circuit to detect the signal recorded on the disk, and in this detection process A playback device in which the mechanical position of a playback needle with respect to a disc is corrected to a desired position by a servo circuit, comprising: an arm housing that is movable in the radial direction of the disc; and an arm housing that is detachably housed within the arm housing. a cartridge provided with a cantilever; and a printed wiring board that is attached to the arm housing near a portion in which the cartridge is housed, that is electrically connectable to the regeneration needle, and that is connected to the resonant circuit. 2. A signal detection circuit device comprising: a printed wiring board in which the resonant circuit section and the servo circuit section are integrally incorporated.

(2) Registration of a utility model characterized in that the printed wiring board has a shape in which servo circuit parts are arranged on both sides of one end in the longitudinal direction of the arm housing, and the tip of the cantilever is located in the middle part. A signal detection circuit device according to claim 1.

(3) The arm housing is formed so that an unnecessary signal blocking filter can be attached to the vicinity of where the servo circuit section of the printed wiring board is attached. and the signal detection circuit device according to item 2.