JPS61156380A - Data writing system of magnetic card - Google Patents

Abstract

PURPOSE:To require no detection of a running speed of a magnetic card by reading a writing clock previously recorded in the magnetic card and writing a data synchronously with the read clock. CONSTITUTION:A microcomputer 30 stores a data inputted from an input device 34, gives a writing control signal WC in a writing driving circuit 35 and transmits a solenoid driving signal SOL. After a solenoid 11 of a card receiving mechanism 10 is driven, an existence of a writing clock WCL written in a recording area of the card is judged. The clock WCL is read by a discharge movement of the card from a reading head 14 through an amplifier 31, a wave shape forming circuit 32. When the clock WCL rises, a new writing data WDT is given to the driving circuit 35. Synchronizing with the clock WCL, this writing data WDT is written in a data writing region of the card through a writing head 13.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a data writing method for writing data to a magnetic card.

[Description of Prior Art] As is well known, a magnetic card has a rectangular card body with a magnetic stripe for recording information parallel to its long side. On the magnetic stripe, in addition to a data bit string for recording target information, an O bit string for clock formation is written in the margins at both ends of the magnetic stripe. This O bit string is prepared for internally forming a clock signal for the magnetic card reading device to read the recorded information on the card.The reading device refers to this θ bit string and internally forms a clock signal to read the recorded information on the card. Read out.

Therefore, when writing information to the magnetic stripe,
It is necessary to write data bits at regular intervals, including 0 bit strings. Therefore, when writing data, either the magnetic card is run at a constant speed relative to the write head, or the card's running speed is continuously detected.
It was necessary to control the writing timing of data bits according to this detection speed. As a result, there was a problem that the configuration of the data writing device became complicated and the cost increased further.

[Object of the Invention] The present invention has been made based on the above-mentioned viewpoints, and its object is to eliminate the need for constant-speed running or detection of the running speed of a magnetic card, simplify the configuration of a data writing device, and reduce costs. The objective is to provide a data writing method that contributes to the invention.

[Means for Achieving the Object] In the present invention, a magnetic card is provided with a data write area and a recording area in which a write clock is recorded in advance, and a read head capable of reading the write clock; A write head capable of writing data is provided in the data write area, and when the magnetic card is moved, the write clock is read out, and the data write area is read out in synchronization with the read write clock. The above objective is achieved by writing desired data into the .

[Embodiments of the Invention] Fig. 1 is a schematic diagram showing a specific example of a magnetic card applied to the present invention, Fig. 2 is a block diagram showing an embodiment of the present invention, and Fig. 3 is a diagram showing a card acceptance mechanism. FIG. 2 is a configuration cross-sectional view showing one specific example.

In FIG. 1, l is a magnetic card, and 2 is a magnetic stripe formed parallel to the long side of the card l. The magnetic stripe 2 is provided with a data write area 3 for data recording and a recording area 4 in which a write clock is recorded in advance. Data writing area 3 is the insertion side 1 for the card acceptance mechanism described later.
A recording area 4 for the write clock is provided on the opposite side 1b of the insertion side 1a. The data write area 3 includes arbitrary data 3a, a θ bit string 3b for forming a read clock, a start code 3c, and an end code 3.
d is written, and the LRC code 3e for error detection is written.
is written. The write clock is written in advance at regular intervals, and once written, it is not erased during a data write operation, as will be described later.

In FIG. 2, a card receiving mechanism 10 includes a solenoid 11, a card detection switch 12, a write head 13, and a read head 14, and has the configuration shown in FIG.

In FIG. 3, 15 is a housing provided with an insertion passage 15a for the card 1;
A card ejection lever 16 is provided at the back of 5a.

The ejection lever 16 is rotatably supported by a shaft 17, and is held by a stopper (not shown) while being biased by a spring 18 in the direction of ejecting the card 1. The free end of the ejection lever 16 is provided with a contact portion 19 that contacts the insertion side 1a of the card l, and the front surface of the ejection lever 16 is provided with a locking lever 2.
A protruding pin 21 that engages with the locking portion 20a of 0 is provided. The card ejection lever 16 having such a structure is pushed up and locked by the locking lever 20 when the card I is inserted.

The locking lever 20 has one end rotatably supported by a shaft 22 and the other end engaged with the plunger lla of the solenoid 11. A spring 23 is provided between the locking lever 20 and the housing 15, which biases the locking lever 20 in a direction to lock the ejection lever 16. When the card l is completely inserted, the ejection lever 16 is locked by the locking lever 20, and when the plunger lla is pulled leftward in the drawing by the drive of the solenoid 11, the lock is released, and the ejection lever is rotated by the repulsive force of the spring 18. 1
6, the card l is ejected.

The card detection switch 12 is provided at the innermost part of the card insertion passage 15a, and when the card l is completely inserted, the ejection lever 16
When the ejection lever 16 is locked, the end 16a of the ejection lever 16 comes into contact with the ejection lever 16, thereby detecting the insertion of the card l.

The write head 13 is provided at the back of the insertion passage 15a on the magnetic stripe 2 of the card 1, so that data can be written in the data write area 3 while the card l is ejected by the repulsion of the spring 18. It is located in

The read head 14 is provided on the magnetic stripe 2 of the card l near the entrance of the insertion passage 15a, and is arranged so that it can read the write clock while the card l is being ejected by the repulsion of the spring 18. There is.

Returning to Figure 2, 30 is a microcomputer, CP
U301 and ROM302 containing control programs, etc.
and a RAM 303 for storing write data and the like.

The microcomputer 30 receives a card detection signal SW, a writing clock WCL, and a reading clock RC as inputs.
P, receives read data RDD and write information. The card detection signal SW is given from the card detection switch 12 when the card I is completely inserted into the receiving mechanism 10. The write clock WCL is activated by the read head 14 .during the ejection process of the card 1 . It is provided via an amplifier 31 and a waveform shaping circuit 32. The read clock RCP is generated by the read circuit 33 from the θ bit string 3b of the card I obtained through the read head 14 and the amplifier 31 during the insertion process of the card I, and is provided to the microcomputer 30.

The read data RDD is read out by the read head 14. during the insertion process of the card l. It is provided via an amplifier 31 and a readout circuit 33. The writing information is given from an input device 34 such as a keyboard.

On the other hand, outputs include a solenoid drive signal SQL for the solenoid 11, a write control signal WC and write data WDT for the write drive circuit 35 that drives the write head 13, and display information for the display device 36. . Write control signal WC is a signal for enabling write drive circuit 35. The write data VDT is input to the input device 3.
It includes the write information given from 4 as arbitrary data 3a explained in FIG.
, end code 3d and LRC code 3e.

FIG. 4 is an operation flowchart of the above configuration, and the operation of the above configuration will be explained below using FIG.

When the control program is started by applying a power supply (not shown), the program enters step 40 after initialization.

In step 40, it is determined whether the card detection switch 12 is on or off. Thereby, it is determined whether or not the card 1 remains inserted into the receiving mechanism 10 due to, for example, a power outage that occurred during the previous card insertion. If the detection switch 12 is on, that is, if the card 1 remains inserted, the process moves to step 41, and a solenoid drive signal SQL for driving the solenoid 11 for a short time to eject the card 1 is output. On the other hand, if the detection switch 12 is off, the process proceeds to the next step 42.

In step 42, it is determined whether or not the read clock RCP supplied from the read circuit 33 rises. If the clock RCP does not rise, the card l is in the receiving mechanism 1.
0 has not been inserted yet, so step 4
Return to 0. When the card 1 is inserted and the clock RCP rises, the arbitrary data 3a and 0 bit string 3b written in the data write area 3 of the card 1 are executed in a closed loop from step 43 through steps 44 and 45 and back to step 43. , the start code 3c, the end code 3d, and the LRC code 3e are read in synchronization with the clock RCP.

The complete insertion of the card 1 is detected through the on/off determination of the card detection switch 12 in step 44 of the closed loop, thereby completing the data reading and displaying the recorded information on the display device 36 (step 46);
If the reading clock RCP no longer rises in step 45, a closed loop returns to step 44, and the state waits for complete insertion of the card 1.

The above is the data read operation, and then the new data write operation is started.

In the next step 47 following the information display, new write information is allowed to be input from the input device 34, and the input new data is temporarily stored.Then, the write control signal WC is sent to the write drive circuit 35. After the drive circuit 35 is set in the write driving state (step 48), the internal timer of the microcomputer 3o is started (step 49).
The solenoid drive signal SOL for driving the solenoid I" 11 is sent out (step 50) in sequence. The time limit of the internal timer is as shown in FIG. It is sufficient to cover the time required to reach the state shown by the solid line, for example, 30
It is set to about 0m5ec.

After the solenoid 11 is driven, in step 51, the write clock WC written in the recording area 4 of the card 1 is
It is determined whether L rises or not.

Clock WCL is clocked when reading head 1 is ejected and moved when card 1 is ejected.
4 through an amplifier 31 and a waveform shaping circuit 32. When the clock WCL rises, write data WDT including new write information is given to the drive circuit 35 in a closed loop that passes through steps 51 and 52 and returns to step 51 again, and this write data W is synchronized with the clock WCL.
DT is written into the data write area 3 of the card 1 via the write head 13.

If the write clock WCL does not rise, step 5
3, it is determined whether or not the internal timer has timed up. If the internal timer times up, solenoid F
Sending of the drive signal SQL to l l is stopped (step 54), and the write operation ends. If the time-up has not occurred, the process returns to step 51 and enters a time-up waiting state.

In the embodiments described above, the end of writing is detected using a timer, but the invention is not limited to this. It is also possible to detect the end of ejection of the card l using a photo sensor, etc., and thereby detect the end of writing. Also, in this example,
Although the writing operation is performed when the card l is moved by the repulsive force of the spring, it goes without saying that the present invention is also applicable to other cases where the card l is moved manually, for example.

[Effects of the Invention] As explained below, according to the present invention, the write clock recorded on the magnetic card is read out, and data is written in synchronization with the read clock. Therefore, there is no need to run the magnetic card at a constant speed or to detect the running speed, and to provide a data writing method for a magnetic card that can simplify the configuration of a data writing device and contribute to reducing manufacturing costs. be able to.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing a specific example of a magnetic card applied to the present invention, Fig. 2 is a block diagram showing an embodiment of the present invention, and Fig. 3 is a configuration showing a specific example of a card acceptance mechanism. The sectional view and FIG. 4 are operational flowcharts of the above configuration. 1 Magnetic card 2 Magnetic stripe 3 Data write area 4 Write clock recording area 10 Card acceptance mechanism 13 Write head 14 Read head 30 Microcomputer 32 Waveform shaping circuit 33 Read circuit 34 Input circuit 35 Write drive circuit

Claims (2)

[Claims] (1) A magnetic card is provided with a data write area and a recording area in which a write clock is recorded in advance, and a read head capable of reading the write clock and a write head capable of writing in the data write area. A magnetic card characterized in that the write clock is read out when the magnetic card is moved, and desired data is written in the data write area in synchronization with the read write clock. Data writing method. (2) The magnetic card data writing method according to claim 1, wherein the magnetic card is moved by repulsion of a spring.