JPS6325802A - Magnetic recording medium reader and writer - Google Patents

Abstract

PURPOSE:To read and write data on plural kinds of magnetic stripe by providing a means which detects the rotative velocity of a shaft to generate a timing signal synchronized with this velocity. CONSTITUTION:Timing disk plates 2 and 6 are fixed to both ends of a shaft 4 and are rotated in accordance with the rotation of the shaft 4. Plural slits are formed at intervals of a first certain length on the peripheral part of the timing disk plate 2, and the presence of the absence of slits is detected by a sensor 3, and a pulse is generated at the time of detecting the slit to obtain a first timing signal. Data is written on or read from a magnetic stripe synchronously with this timing signal. Meanwhile, plural slits are formed at intervals of a second certain length different from the first certain length on the timing disk plates 6, and slits of the disk plate 6 are detected by a sensor 7 to generate a second timing signal different from the first timing signal, and data is written on the magnetic stripe with either of two kinds of write density.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a reading system that reads and writes data to a magnetic recording medium such as a magnetic stripe attached to a bankbook used in a financial institution, for example. - Regarding writing devices.

[Conventional technology]

The magnetic stripes attached to passbooks handled by financial institutions record data at different writing densities depending on the financial institution, and are not standardized.

In the conventional magnetic head movable magnetic stripe reader 9 writing device, the magnetic head 1 is moved as shown in FIG. 2 in order to prevent fluctuations in the moving speed of the magnetic head from affecting the writing density. The timing disc plate 2 is attached to the shaft 4 of the engine. This timing disk plate 2 has a plurality of slits formed at regular intervals around its periphery. When the shaft 4 rotates, the disk plate 2 rotates accordingly, and the sensor 3 detects the presence or absence of a slit and generates a pulse train by generating a pulse when a slit is present. This pulse train is used as a timing signal for writing and reading data to the magnetic stripe. In this way, data can be written on the magnetic stripe with uniform writing density even if the moving speed of the magnetic head varies.

[Problem that the invention seeks to solve]

The above-mentioned conventional magnetic head movable magnetic stripe reading/writing device has the disadvantage that it is not possible to read or write two or more magnetic stripes on which data is recorded at different writing densities using the same device. be.

[Means for solving problems]

The device of the present invention includes a magnetic head that reads and writes data to a magnetic recording medium, a shaft that is free to rotate in different directions so as to cause the magnetic head to reciprocate, and a shaft that detects the rotational speed of the shaft and detects the rotational speed of the shaft. and timing signal generation means for generating a plurality of different timing signals synchronized with the rotational speed.

〔Example〕 Next, the present invention will be explained in detail with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of the present invention.

In this embodiment, the magnetic head 1 is fixed to a head carrier 5. The head carrier 5 is connected to a screw-shaped shaft 4, and when the shaft 4 is rotated by another drive motor (not shown), the head carrier 5 moves in the length direction of the shaft 4 according to the rotation direction of the motor. do.

Furthermore, timing disk plates 2 and 6 are fixed to both ends of the shaft 4, respectively, and rotate in response to the rotation of the shaft 40. On the timing disc plate 2,
A plurality of slits are formed at a first constant interval around the periphery, and a sensor 3 detects the presence or absence of the slits, and generates a pulse when a slit is detected, thereby generating a first timing signal. get. Data is written to or read from the magnetic stripe in synchronization with this timing signal.

On the other hand, a second timing signal different from the first timing signal can be generated by a plurality of swivels on the timing disk plate 6 at a second fixed interval different from the first fixed interval. In this way, in this embodiment, data can be written on the magnetic stripe at either of the two writing densities.

Here, when writing, you can specify which writing density to write from the host device, but when reading, it is unknown at which writing density the magnetic stripe is written, so which density should be used for reading. The question is: As a solution to this problem, for example, during the reciprocating movement of the magnetic head 1, read according to one density during the forward movement), and if reading is not possible, read according to the other density during the return operation. Fortunately, the series of processes can be completed with the same operation as the conventional one.Also, in this embodiment, one additional timing disk was shown, but as shown in FIG. Additionally, several types of slits may be provided on different circumferences on one disk plate, each corresponding to each writing density.

〔Effect of the invention〕

As described above, the present invention has the advantage that reading and writing of a plurality of types of magnetic stripes can be achieved.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the present invention, Fig. 2 is a perspective view of a conventional magnetic head movable magnetic stripe reading/writing device, and Fig. 3 shows slits formed to match two types of writing density. FIG. 3 is a diagram showing an example of a timing disk plate. 1... Magnetic head, 2... Timing disk plate, 3... Sensor, 4... Shaft, 5... Head carrier, 6・・・・・・
・Timing disk plate, 7...Sensor.

Claims (1)

[Claims] A magnetic recording medium reading/writing device that performs read and write operations on a magnetic recording medium in synchronization with a timing signal, comprising: a magnetic head that reads and writes data on the magnetic recording medium; , a shaft rotatable in different directions to cause the magnetic head to reciprocate; and timing signal generation means for detecting the rotational speed of the shaft and generating a plurality of different timing signals synchronized with the rotational speed. A magnetic recording medium reading/writing device characterized by: