DE2461717A1 - Photoelectric regulation of speed of tape winding spindle - involves photocell partially shadowed by tape coils to produce control signal - Google Patents

Photoelectric regulation of speed of tape winding spindle - involves photocell partially shadowed by tape coils to produce control signal

Info

Publication number
DE2461717A1
DE2461717A1 DE19742461717 DE2461717A DE2461717A1 DE 2461717 A1 DE2461717 A1 DE 2461717A1 DE 19742461717 DE19742461717 DE 19742461717 DE 2461717 A DE2461717 A DE 2461717A DE 2461717 A1 DE2461717 A1 DE 2461717A1
Authority
DE
Germany
Prior art keywords
tape
winding
motor
tape cassette
light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
DE19742461717
Other languages
German (de)
Inventor
Volkmar Thun
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Braun GmbH
Original Assignee
Braun GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Braun GmbH filed Critical Braun GmbH
Priority to DE19742461717 priority Critical patent/DE2461717A1/en
Publication of DE2461717A1 publication Critical patent/DE2461717A1/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B15/16—Control of operating function, e.g. switching from recording to reproducing by sensing presence, absence or position of record carrier or container
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
    • G11B15/46—Controlling, regulating, or indicating speed

Landscapes

  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)

Abstract

The apparatus has a lamp which shines through a lens to send a beam of light between the tape feed spool and the take up spool, parallel to the axes of the spools, and the light not cut off by the coils of tape falls onto a sensor which provies two inputs to an amplifier. The singe output of the amplifier is connected to a control device which regulates the speed of the motor which drives the spindle on the takeup spool. the torque produced by the motor is regulated according to the diameter of the coil of tape: the torque increases as the tape is wound up on the spool so as to keep the tension of the tape constant.

Description

FOTOELEKTRISCHE REGELUNG EINES WICKELDORNS Die Erfindung betrifft ein Tonbandkassettengerät, bestehend aus einem Gehäuse mit einer Kassettenaufnahme für eine Tonbandkassette und mit einem durch einen Elektromotor angetriebenen, in die Tonbandkassette eingreifenden Wickeldorn.PHOTOELECTRIC CONTROL OF A COILING mandrel The invention relates to a tape cassette device, consisting of a housing with a cassette holder for a tape cassette and with an in the mandrel engaging the tape cassette.

Bei den bisher bekannten Kassettentonbandgeräten ist der Bandzug m Tonband selbst nur schwer kontrollierbar, weil Fühlmittel, beispielsweise Drehmomente zur Erreichung der gleichen Tonbandzugkraft an den jeweiligen Radius des Wickels änpassbar geworden sind.In the previously known cassette tape recorders, the tape tension is m The tape itself is difficult to control because of feeler means, for example Torques to achieve the same tape tension on the respective radius of the roll have become customizable.

Bei einer Weiterentwicklung der Erfindung ist das der Abdeckung des Wickelfensters proporti9-nale Signal des Lichtsensors verstärkbar, sodass der den Wickeldorn antreibende Motor durch einen der Abdeckung proportionalen Strom speisbar ist.In a further development of the invention, that is the cover of the Winding window proportional signal of the light sensor can be amplified so that the Winding mandrel driving motor can be fed by a current proportional to the cover is.

Durch diese Proportionalregelung ist eine besonders feinfühlige Anpassung von Wickeldurchmesser und Drehmoment ermöglicht.This proportional control enables a particularly sensitive adjustment made possible by winding diameter and torque.

In einer besonders einfachen Ausbildung der Erfindung besteht die Lichtschranke aus mehreren nebeneinander liegenden Lichtschranken, deren jeweiliges Signal nach Verstärkung je einem elektr-ischen Schalter zur Änderung des Speisestromes für den den Wickeldorn antreibenden Motor zugeführt ist.In a particularly simple embodiment of the invention, there is Light barrier consisting of several adjacent light barriers, their respective Signal after amplification each with an electrical switch to change the supply current is supplied for the motor driving the winding mandrel.

Der Vorteil dieser vereinfachenden Anordnung besteht darin, dass die aufwendigere stetige Proportional regelung durch die robustere Stufenregelung ersetzbar ist.The advantage of this simplifying arrangement is that the more complex constant proportional control can be replaced by the more robust step control is.

Weitere Einzelheiten der Erfindung sind in der nachfolgenden Zeichnung schematisch dargestellt.Further details of the invention are in the following drawing shown schematically.

Fühlhebel, durch die geschlossene Bauweise der Tonbandkassetten nicht anbringbar sind.Feeler lever, not due to the closed design of the tape cassette are attachable.

Da zur Erzielung eines ausreichenden Tonbandglelchlaufes insbesondere bei Geräten hoher Klangqualität der Bandzug möglichst konstant gehalten, und das Tonband bei den schnellen Vor- und Rückwärtsläufen geschont werden soll, besteht die Aufgabe, eine Anordnung zu schaffen, bei der ein von der Wickelgrösse abhängiges Drehmoment für den Wickelmotor erreichbar ist.As to achieve a sufficient tape run especially in devices with high sound quality, the tape tension is kept as constant as possible, and that Tape should be spared during fast forward and backward runs the task of creating an arrangement in which one dependent on the lap size Torque for the winding motor is achievable.

Die Aufgabe wird dadurch gelöst, dass in der Kassettenaufnahme für die Tonbandkassette eine die Abdeckung des Wickelfensters der Tonbandkassette überwachende, aus einem fotoelektrischen Sensor und einer Lichtquelle bestehende Lichtschranke angeordnet ist, deren elektrisches Signal den Motorstrom des den Wickeldorn antreibenden Motors derart ändert, dass dem dringen Wickeldurchmesser des mit dem Wickeldorn im Eingriff stehende Wickels das geringe Drehmoment, dem grossen Wlckeldurchmesser das grosse Drehmoment des Regelbereiches entspricht.The object is achieved in that in the cassette holder for the tape cassette monitoring the cover of the winding window of the tape cassette, Light barrier consisting of a photoelectric sensor and a light source is arranged, the electrical signal of which the motor current of the winding mandrel driving Motor changes in such a way that the winding diameter of the penetrate with the winding mandrel engaged winding the low torque, the large winding diameter corresponds to the large torque of the control range.

Der Vorteil diester Anordnung besteht darin, dass nunmehr die mit dem Wickel radius veränderlichen Es zeigen: Figur 1 eine Anordnung mit einer Lichtschranke; Figur 2 eine Anordnung mit mehreren Lichtschranken In Figur 1 ist eine ein Wickelfenster loo aufweisende Tonbandkassette 1, In der sich Spulen lol, 102 befinden, in einer Kassettenaufnahme 2 eines Kassettentonbandgerätes eingelegt. Auf den Spulen lol, 1o2 ist ein Tonband 103 aufgewickelt, das jeweils einen Wickel 1030 und 1031 bildet.The advantage of this arrangement is that now the with the winding radius changeable They show: FIG. 1 an arrangement with a light barrier; FIG. 2 shows an arrangement with several light barriers in FIG 1 is a tape cassette 1 having a winding window loo, in which there are reels lol, 102, inserted in a cassette holder 2 of a cassette tape recorder. A tape 103 is wound onto the reels lol, 1o2, each one winding 1030 and 1031 forms.

Wickeldorne 201, 202 des Tonbandkassettengerätes greifen in die Spulen lol, 1o2 ein und treiben diese an.Winding mandrels 201, 202 of the tape cassette device grip the reels lol, 1o2 one and power this up.

In der Kassettenaufnahme 2 ist eine Lichtquelle 203 angeordnet, die über eine Linse 204 einen Fotosensor 205 bestrahlt. Wird nun das Wickelfenster loo durch den Wickel 1030 nach und nach ausgefüllt, entsteht ein abnehmendes elektrlsches Signal In Fotosensor 205, das nach Ver-.In the cassette holder 2, a light source 203 is arranged, which A photo sensor 205 is irradiated via a lens 204. Now the changing window is loo Gradually filled in by the coil 1030, a decreasing electrical effect arises Signal in photosensor 205, which after ver.

stärkung in Verstärker 206 einer einen Motor 2o7 geregelten Regelstrecke 208 zugeführt Ist.amplification in amplifier 206 of a controlled system controlled by a motor 2o7 208 is supplied.

In Figur 2 sind mehrere Lichtschranken 2o3o, 2040, 2050; 2031, 2041, 2051; 2032, 2042, 2052 nebeneinander antgeordnet, deren Signal Verstärkern.In Figure 2, several light barriers 2o3o, 2040, 2050; 2031, 2041, 2051; 2032, 2042, 2052 arranged side by side, their signal amplifiers.

2060, 2061, 2062 zugeführt ist. Diese Verstärker steuern Schalter 2080, 2081, 2082, die den Speisestrom des Motors 207 durch Kurzschliessen der Vorwiderstände 2090, 2091, 2092 ändern. Im übrigen entspricht Figur 2 der Figur 1.2060, 2061, 2062 is supplied. These amplifiers control switches 2080, 2081, 2082, the Feed current of the motor 207 by short-circuiting of the series resistors 2090, 2091, 2092 change. Otherwise, Figure 2 corresponds to the figure 1.

Claims (3)

PATENTANSPRÜCHE PATENT CLAIMS Tonbandkassettengerät, bestehend aus einem Gehäuse mit einer Kassettenaufnahme für eine Tonbandkassette und mit einem durch einen Elektromotor angetriebenen, in die Tonbandkassette eingreifenden Wickeldorn, d a d u r c h g e -k e n n z e i c h n e t , dass in der Kassettenaufnahme (2) für die Tonbandkassette (1) eine die Abdeckung des Wickelfensters (loo) der Tonbandkassette (1) überwachende, aus einem fotoelektrlschen Sensor (205) und einer Lichtquelle (203) bestehende Lichtschranke angeordnet ist, deren elektrisches Signal den Motorstrom des den Wickeldorn (202) antreibenden Motors (207) derart ändert, dass dem geringen Wickeldurchmesser des mit dem Wickeldorn im Eingriff stehenden Wickels (1031) das geringe Drehmoment, dem grossen Wickeldurchmesser das grosse Drehmoment des Regelbereiches entspricht.Tape cassette device, consisting of a housing with a cassette holder for a tape cassette and with an in the mandrel engaging the tape cassette, d a d u r c h g e -k e n n n z e i c n e t that in the cassette holder (2) for the audio tape cassette (1) a Cover of the winding window (loo) of the tape cassette (1) monitoring, from one photoelectric sensor (205) and a light source (203) existing light barrier is arranged, the electrical signal of which the motor current of the winding mandrel (202) driving motor (207) changes in such a way that the small winding diameter of the with the winding mandrel engaged winding (1031) the low torque, the large winding diameter corresponds to the large torque of the control range. 2. Anordnung nach Anspruch 1, d a d u r c h' g e k e n n z e i c h n e t , dass das der Abdeckung des Wickelfensters (loo) proportionale Signal des Lichtsensors (205) verstärkbar ist und der den Wickeldorn antreibende Motor (207) durch einen der Abdeckung proportionalen Strom speisbar ist.2. Arrangement according to claim 1, d a d u r c h 'g e k e n n z e i c h n e t that the cover of the changing window (loo) proportional signal of the Light sensor (205) can be amplified and the motor (207) driving the winding mandrel can be fed by a current proportional to the cover. 3. Anordnung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , dass die Lichtschranke aus mehreren nebeneinanderliegenden Lichtschranken (2030,...2032; 2040"..2042; 2050,...2052) besteht, deren jeweiliges Signal nach Verstärkung in einem Verstärker (2060, 2061, 2062) je einem elektrischen Schalter C2080, 2081, 2082) zur Änderung des Speisestromes für den den Wickeldorn antreibenden Motor (207) zugeführt Ist.3. Arrangement according to claim 1, d a d u r c h g e k e n n z e i c h n e t that the light barrier consists of several adjacent light barriers (2030, ... 2032; 2040 ".. 2042; 2050, ... 2052), their respective signal after Amplification in an amplifier (2060, 2061, 2062) each with an electrical switch C2080, 2081, 2082) to change the supply current for the one driving the winding mandrel Motor (207) is supplied.
DE19742461717 1974-12-28 1974-12-28 Photoelectric regulation of speed of tape winding spindle - involves photocell partially shadowed by tape coils to produce control signal Pending DE2461717A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19742461717 DE2461717A1 (en) 1974-12-28 1974-12-28 Photoelectric regulation of speed of tape winding spindle - involves photocell partially shadowed by tape coils to produce control signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742461717 DE2461717A1 (en) 1974-12-28 1974-12-28 Photoelectric regulation of speed of tape winding spindle - involves photocell partially shadowed by tape coils to produce control signal

Publications (1)

Publication Number Publication Date
DE2461717A1 true DE2461717A1 (en) 1976-07-08

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ID=5934695

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Application Number Title Priority Date Filing Date
DE19742461717 Pending DE2461717A1 (en) 1974-12-28 1974-12-28 Photoelectric regulation of speed of tape winding spindle - involves photocell partially shadowed by tape coils to produce control signal

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DE (1) DE2461717A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3143158A1 (en) * 1980-10-30 1982-06-03 Ampex Corp., 94063 Redwood City, Calif. DIGITAL CIRCUIT ARRANGEMENT FOR CONTROLLING THE TENSION OF A TAPE DRIVEN BY A CAPSTAN
AT377374B (en) * 1981-04-14 1985-03-11 Sony Corp CONTROL FOR A MOTOR FOR DRIVING A TAPE STRETCHING BETWEEN TWO REELS
EP0503105A1 (en) * 1991-03-08 1992-09-16 Lung-Ching Lin Automatic three-stage tape winding speed controller
WO2001063612A2 (en) * 2000-02-23 2001-08-30 Sensormatic Electronics Corporation Automatic rewind detection for magnetic tape cassettes

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3143158A1 (en) * 1980-10-30 1982-06-03 Ampex Corp., 94063 Redwood City, Calif. DIGITAL CIRCUIT ARRANGEMENT FOR CONTROLLING THE TENSION OF A TAPE DRIVEN BY A CAPSTAN
AT377374B (en) * 1981-04-14 1985-03-11 Sony Corp CONTROL FOR A MOTOR FOR DRIVING A TAPE STRETCHING BETWEEN TWO REELS
EP0503105A1 (en) * 1991-03-08 1992-09-16 Lung-Ching Lin Automatic three-stage tape winding speed controller
WO2001063612A2 (en) * 2000-02-23 2001-08-30 Sensormatic Electronics Corporation Automatic rewind detection for magnetic tape cassettes
WO2001063612A3 (en) * 2000-02-23 2002-04-04 Sensormatic Electronics Corp Automatic rewind detection for magnetic tape cassettes

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