DD208003A1 - RETRACTING MECHANISM FOR MAGNETIC CARDS - Google Patents

Abstract

THE INVENTION CAN BE USED IN LESEE DEVICES FOR CARD-FORMAT RECORDERS WITH A MAGNETIC DATA PATH. THE OBJECTIVE OF THE INVENTION IS TO OBTAIN AN IMPRESSION MECHANISM FOR MAGNETIC CARDS, WHERE IT CAN NOT COME TO THE DEFORMATION OF FUNCTIONAL ELEMENTS. OBJECT OF THE INVENTION IS TO OBTAIN A PRESSURE MECHANISM FOR MAGNETIC CARDS WHERE THE MAGNETIC HEAD IS NOT REPRESENTED TO THE REPRESENTATIVE ROLL IN CALENDAR. In accordance with the invention, the task is accomplished by mounting a first lever arm which is rotatable under spring tension and at which a magnet head is mounted, and a second arm arm, which is also rotatable, under spring tension and in which a counterpressure roller is located, by means of one MEASURING PENCIL MECHANICALLY COUPLED IN THE MAP CREAM.

Description

02/10/1981

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Title of the invention s

Pressure mechanism for magnetic cards

Field of application of the invention

The invention can be used in card-shaped recording media readers with a magnetic data track. Typical representatives for this are reading devices for identity cards and credit cards, preferably those in which the card is manually guided.

Characteristic of the known technical solutions

In US-PS 4,152,584 a reader for magnetic cards is presented. There, the magnetic head is resiliently mounted on a first lever and presses in the rest position against the counter-pressure roller. A second lever is in operative connection with the first lever and extends in the rest position with a first lever arm into the card slot, so it first abuts against the second lever and pushes it out of the card gap so far out that only the arranged at the end of the first lever arm Roll against the map presses. During this pivoting movement, the first lever with the magnetic head arranged thereon is pressed in the direction of the card running gap by the second lever arm of the second lever. This results in a defined pressure force of the magnetic head against the magnetic card ,,

The disadvantage of this solution is that the magnetic head is pressed in the rest position against the counter-pressure roller. this leads to

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To deformations of this counter-pressure roller and possibly damage the magnetic head and can affect the reliability of the device. ·

Object of the invention

The aim of the invention is to provide a pressure mechanism for magnetic cards, in which there may be no deformation of Funktiohselementen.

Explanation of the essence of the invention

The object of the invention is to provide a pressure mechanism for magnetic cards, wherein in the rest position of the magnetic head is not pressed against the counter-pressure roller.

According to the invention the object is achieved in that a first lever arm, which is rotatable, is under spring tension and on which a magnetic head is fixed, and a second lever arm, which is also rotatable, is under spring tension and on which there is a counter-pressure roller, by means of a Spacer pin mechanically coupled in the card running gap are arranged dipping.

The invention will be explained in more detail with reference to a drawing. FIG. 1 shows the top view of a pressure mechanism according to the invention.

embodiment

In the example of a pressure mechanism according to the invention shown in Fig. 1, a magnetic card 1, which may also be referred to as identification card or credit card, is inserted from the right into the card running gap 2. The rest position of the arrangement is as follows is rotatably mounted about a frame-fixed axis B, which is parallel to the card running gap 2. In this first lever arm 3 is integrated a holder 4 · for a magnetic head 5. Thus, the magnetic head 5 in the direction of card running gap 2 or moved away therefrom first tension spring 6, it is pulled in the direction card run gap 2.

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On the other side of the card running gap 2, a second lever 7 supporting a pinch roller 8 is arranged in a bearing 12 so that it can pivot the pinch roller 8 into or away from the card running nip. By means of a second tension spring 9, the second lever arm 7 is pulled in clearing card running gap. The resulting movement is limited by a stop pin IO. This results in a maximum immersion depth of the pressure roller in the card gap.

In order to prevent the magnetic head 5 and the pressure roller from the tension springs 6, 9 are pressed against each other, a spacer pin 11 is disposed on the second lever arm. This spacer pin 11 presses against a corresponding part of the first lever arm 3 by a corresponding dimensioning a minimum distance between the magnetic head 5 and pinch roller 8 is defined.

In order to protect the Kopfkopf.des magnetic head 5 as far as possible from damage by the edges of magnetic cards 1, the forces of the tension springs 6 and 9 and the length of the stop pin 10 are dimensioned so that the pinch roller 8 protrudes into the card running gap 2 and the Magnetic head 5 is located outside the card running gap 2, wherein both are offset by an amount S to each other.

Now, if the magnetic card is introduced, it first abuts against the pinch roller 8 and pushes it out of the card running gap. This removes the second lever arm 7 with stop pin 10 and spacer pin 11 also from its rest position. Due to the spring forces of the magnetic head 5 is resiliently to the magnetic. card 1 pressed. ,

As a result of a suitable movement reduction between the lever arms 3 and 7 via the spacer pin -11, the movement stroke of the magnetic head 5 is substantially greater than that of the pressure roller 8.

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In order to further increase the mobility of the magnetic head 5, this can be arranged in its holder 4 about an axis A pivotally.

In this way it is possible under all operating conditions, so even if the magnetic card 1 is tilted during the leadership in the card running gap 2 and / or it has warped itself, to guarantee optimal contact between the magnetic head 5 and magnetic card 1.

Claims (1)

234058 0 Inventive Ansprucli Andruckme mechanism for magnetic cards, consisting of a rotatable and under J ederspannung standing first lever on which a magnetic head is pivotally mounted and arranged on a rotatably .und spring-tensioned.state second lever arm, characterized in that the first lever arm (3 ) and the second lever arm (7) are mechanically coupled by means of a spacer pin (11) For this 1 sheet drawings