JPS6358332U

JPS6358332U -

Info

Publication number: JPS6358332U
Application number: JP15267386U
Authority: JP
Priority date: 1986-10-04
Filing date: 1986-10-04
Publication date: 1988-04-19
Anticipated expiration: 2001-10-04
Also published as: JPH0516662Y2

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示すブロツク図、
２図は同上動作説明図、第３図は従来のフリクシ
ヨンドライブのテープトランスポートのブロツク
図である。１，２……リール台、３，４……リール、５…
…キヤプスタン、６，７……ガイドピン、８……
ガイドローラ、９，１０……ローラ、１１，１２
……軸、１３，１４……テンシヨンアーム、１５
，１６……位置センサー、１７，１８……モータ
駆動回路、１９，２０……モータ、２１，２２…
…バネ、２３，２４……方向判別回路、２５，２
６……ＦＶコンバータ、２７，２８……加算器、
２９，３０……反転アンプ、３１，３２，３３，
３４……スイツチ、３５，３６……スリツト板、
３７ａ，３７ｂ，３８ａ，３８ｂ……センサー。 FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is an explanatory diagram of the same operation as above, and FIG. 3 is a block diagram of a tape transport of a conventional friction drive. 1, 2...Reel stand, 3, 4...Reel, 5...
...Capstan, 6,7...Guide pin, 8...
Guide rollers, 9, 10...Rollers, 11, 12
...Axis, 13, 14...Tension arm, 15
, 16... position sensor, 17, 18... motor drive circuit, 19, 20... motor, 21, 22...
... Spring, 23, 24 ... Direction discrimination circuit, 25, 2
6...FV converter, 27, 28...adder,
29, 30...inverting amplifier, 31, 32, 33,
34...Switch, 35, 36...Slit plate,
37a, 37b, 38a, 38b...sensor.

Claims

[Claims for Utility Model Registration] (1) In a tape recorder where the running speed of the tape is determined by the rotation of a capstan, a motor for driving a reel wound with tape, a tension detection means for detecting the tension of the tape, a motor drive circuit that drives the motor so that the tension of the tape becomes a preset value based on a signal from the tension detection means; and a rotation speed detection means that is attached to the motor and detects the rotation speed of the motor. , drive voltage correction means for adding the signal from the rotation speed detection means to the signal from the tension detection means when the motor rotates in the winding direction, and subtracting it when the motor rotates in the feed-out direction; A tape recorder characterized by: (2) The rotational speed detection means includes a slit plate directly connected to the shaft of the motor, a photo sensor that outputs a two-phase clock signal according to the rotation of the slit plate, and a photo sensor that outputs a two-phase clock signal according to the frequency of the output pulse of the photo sensor. The tape recorder according to claim 1, which is comprised of an FV converter that outputs a voltage that is a signal of the rotational speed of the motor in response to the signal. (3) The drive voltage correction means includes a direction determination circuit that determines the rotational direction of the motor based on the output signal from the rotational speed detection means and outputs a determination signal thereof, and is turned ON by the determination signal from the direction determination circuit.
, a polarity selection unit equipped with an inverting amplifier having a switch that is turned OFF, and an adder that adds the output from the polarity selection unit to the output from the tension detection means Claim 1. Or the tape recorder according to item 2.