JPS63175268A - Security system for magnetic card application system - Google Patents

Abstract

PURPOSE:To secure a proper application form of a magnetic card by projecting the electromagnetic waves onto the synchronizing information written into a magnetic stripe and varying the amplitude of said information recorded on the magnetic stripe. CONSTITUTION:The synchronizing information is written into a magnetic stripe 3 on a magnetic card 1 at the time of shipment from a plant, for example, and at the same time a high frequency signal having its intensity varying periodically is projected on the written information for variation of the amplitude of said synchronizing information. Here the prescribed number of fluctuations of said amplitude are prepared. The value information and other necessary information can be written into another magnetic stripe 2 of the card 1 as long as the strip 2 includes at least the synchronizing information. While the value information and other necessary information can be read out of the card 1 as long as those stripes 2 and 3 includes the synchronizing information and also the amplitude variation of the synchronizing information is constant. Furthermore the value information is reduced and written when a charge is settled as long as at least the synchronizing information is included.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a security system for magnetic cards, and in particular, the present invention relates to a security system for magnetic cards, and in particular, a method for writing synchronization information on the magnetic stripe of a magnetic card provided with a magnetic stripe on which information can be written magnetically, and then The magnetic stripe is irradiated with high frequency waves whose intensity changes at a constant cycle, so that the amplitude of the synchronization information recorded on the magnetic stripe is variable, and at least the synchronization information is used to write value information, and when using a magnetic card, the synchronization information is There is information,
The present invention also relates to a security method in a magnetic card usage system in which value information is valid when there is a predetermined number of changes in the amplitude of synchronization information.

[Conventional technology]

2. Description of the Related Art Systems for making payments using magnetic cards are used in various fields, such as ticket vending machines for transportation facilities, card-operated public telephones, and game machines. In such a magnetic card usage system, a user pays a certain amount of money in advance to a service provider, etc., receives a magnetic card with value information written on it, and thereafter, each time a service is provided, the value information of the magnetic card is reduced. This is a system that allows you to pay for the card and use it at any time until the value information on the magnetic card becomes zero.

Such a magnetic card usage system has the advantage that there is no need to prepare cash each time the card is used, and it is easy to handle.

[Problem that the invention seeks to solve]

By the way, when the above-mentioned magnetic card usage system goes against the grain, a situation has arisen in which the magnetic card is used illegally. This is mainly accomplished by writing value information using a predetermined method on a new magnetic card that has no value information written on it, and then using this magnetic card. Therefore, countermeasures against such unauthorized use have been desired.

SUMMARY OF THE INVENTION An object of the present invention is to provide a security system for a magnetic card usage system that solves the above-mentioned problems and ensures proper usage of magnetic cards.

[Means for solving problems]

The present invention, which solves the above-mentioned problems, allows users to pay for services etc. when they receive a service using a magnetic card having a magnetic recording medium on which value information is written, and each time the payment is made, i.
f. In a magnetic card usage system that reduces the value information of a magnetic recording medium and makes it possible to use the magnetic card until the value information becomes zero, the magnetic card is provided with a magnetic recording medium in which synchronization information can be written, writing synchronization information on a magnetic recording medium, and irradiating the synchronization information written on the magnetic stripe with a high frequency signal whose intensity changes at a constant cycle so that the amplitude of the synchronization information recorded on the magnetic stripe is varied; The present invention is characterized in that at least the synchronous information is used to write the value information, and when a magnetic card is used, the value information is made valid on the condition that there is a certain number of amplitudes of the synchronous information in addition to the synchronous information.

[Effect]

It is assumed that the magnetic stripe of the magnetic card is provided with an area where value information and other necessary information can be written, and an area where synchronization information can be written. For example, synchronization information is written on one of the magnetic stripes of a magnetic card at the time of shipment from the factory, and the written synchronization information is irradiated with a high-frequency signal whose intensity changes at a constant cycle to generate information on the magnetic stripe. One amplitude of the synchronization information is varied, and a predetermined number of variations in this amplitude are provided.

Another part of the magnetic stripe on a magnetic card is the value information.
Other necessary information can be written on the condition that at least synchronization information is present in the magnetic stripe.

On the other hand, when using a magnetic card, value information and other information can be read on the condition that there is synchronization information on the magnetic stripe and there are a certain number of amplitude changes in the synchronization information. do. Furthermore, when the value information is reduced when the payment of the price is completed, the synchronization information is written on the condition that there is a small amount of the synchronization information.

〔Example〕

Hereinafter, the present invention will be explained based on illustrated embodiments.

FIG. 1 is a diagram showing a magnetic card used in an embodiment of the present invention. This magnetic card l is a flexible one made of thin plastic or paper, and the longitudinal direction of the magnetic card 1 is Two magnetic stripes 2.3 are provided as magnetic recording media coated with a magnetic material with a width of about one-tenth that of the card, one of which is the magnetic stripe 3.
As shown in FIG. 1 (III), synchronization information such as a timing clock is written in the factory where the magnetic card 1 was manufactured, and a certain number of amplitude changes of a certain period are formed in the synchronization information. There is no writing on the magnetic stripe 2 as shown in FIG. 1(n). This writing will be described later. On the surface of the magnetic card 1 other than the magnetic stripes 2 and 3, there is a punch hole area for visually confirming the remaining number of times, and the remaining number of times is printed on the area, and on other parts, the name of the computer game card, the issuer's name, The amount sold is printed. Such magnetic cards are delivered from a factory to a service provider such as a game center.

FIG. 2 is a block diagram showing the configuration of a synchronous information etc. writing device that writes synchronous information etc. on the magnetic stripe 3 of the magnetic card 1 in a factory etc. that manufactured the magnetic card 1.
A card ejecting mechanism 5 that can take out only one magnetic card l is provided at the bottom of the storage section 4 that stores the magnetic card l, and a roller 6.
A belt 8 is provided between the rollers 7 and 7, and a pair of rollers 9 are provided on the left side of the roller 6 in the drawing.

A pair of rollers 10 is further provided at a certain interval on the left side of the pair of rollers 9 in the figure, and a pair of rollers 11 is similarly provided on the left side of the pair of rollers 10 in the figure. An optical reading type card detector 12 and a write-only magnetic head 13 for writing a timing clock (synchronization information) on the magnetic stripe 3 of the magnetic card 1 are provided between the roller 9 and the roller IO. Also,
Between the rollers 10 and 11, there is a high frequency irradiation device 1 that forms a certain number of amplitude changes of a certain period in the period information.
4, and an optical reading type card detector 16 that detects whether the magnetic card 1 has been ejected from the apparatus. The rollers 9.1O111 are composed of a driving roller and a driven roller, and each of the rollers 9.10.1
The driving side roller 1 is driven by a motor 17, and the roller 6 of the belt 8 is also driven by the motor 17. The operation of this motor 17 is controlled by a control circuit 18. The control circuit 18 includes a motor 17, a card ejection mechanism 5,
It is connected to the card detector 12, 16, the high-frequency irradiation device 14, the clock timing generation circuit 19, and the rotation detector 20 that can detect the rotation of the roller 10, and rotates the motor 17, causing the card ejection mechanism 5 to rotate. magnetic card 1
A series of processes such as extracting the data and operating the clock timing generation circuit 19 can be performed.

The high frequency irradiation device 14 includes a high frequency generation circuit 21 that generates a high frequency signal of about 1 (GHz) to 3 (GHz) based on a command from a control circuit 18;
A transmission system for guiding the high frequency waves from 1 to the irradiation section 15 via a coaxial cable and a waveguide 22, a rotating disk 23A connected to the rotating shaft of the roller 11, and a rotating disk 23A connected to the outer periphery of the rotating disk 23A. A reciprocating mechanism 23 consisting of a connecting rod 23B
and a shutter 24 that protrudes and retreats into the waveguide 22 by the reciprocating motion of the reciprocating mechanism 23, and the reciprocating motion of the shutter supplies the irradiation section 15 with high frequency waves whose intensity changes approximately in a sinusoidal manner. will be done.

Note that the card detector 12 is for the first timing of magnetic recording on the magnetic card 1, and the rotation detector 20 is for the first timing of magnetic recording on the magnetic card 1.
The card detector 16 is used to detect whether the magnetic card has been ejected from the device.

FIG. 3 is used in an embodiment of the present invention, and shows
FIG. 2 is a perspective view showing a magnetic card issuing machine installed by a service bank provider, and the magnetic card issuing machine 25 has a storage section for storing the above-described magnetic card 1 therein, and an insertion section for inserting banknotes into the front side thereof. In addition to providing a slot 26, a display device 27 is provided to display the amount of the inserted banknote, and a magnetic card issue button 28A and a cancel button 28B are provided below the display bag M21. A tray 29 is provided as a receptacle for receiving the magnetic card 1'.

FIG. 4 shows a magnetic card issuing machine 25 used in an embodiment of the present invention.
It is a diagram showing an outline of the signal processing unit of the banknote processing mechanism 30.
determines the denomination of the banknote inserted through the insertion slot 26, displays this on the display device 27, and sends the denomination and issuance command to the magnetic card issue processing circuit 31 by pressing the magnetic card issue button 28A. At the same time, the cancel button 28B is pressed. This allows cancellation processing to be performed when the

On the other hand, the tray 29 has a pair of rollers 32, 33 located above and below the card outlet near the card outlet of the tray 29. A pair of rollers 34, 35 are provided at the top and bottom in the figure, and a pair of rollers 36, 37 are further provided at the top and bottom in the figure with a constant interval between them.
On the right side of 37 in the drawing, there is provided a conveyor belt 40 which is stretched between rollers 38 and 39. Above the conveyor belt 40 in the drawing, there is provided a take-out mechanism 41 that takes out only one magnetic card 1 when a take-out command is input, and the magnetic cards 1, 2, . . . are stored above the take-out mechanism 41. A storage section 42 is provided. The storage section 42 and the take-out mechanism 41 are provided for each denomination, and a conveyance heald 40 is extended below the take-out mechanism 41. A card detector 43 is provided between the rollers 34.35 and 36.37, and a timing clock or the like of the magnetic stripe 3 is provided between the rollers 32.33 and 34.35. same! A read-only magnetic head 44 for reading IJI information, a write-only magnetic head 45 for writing value information and other necessary sentiments, and a card detector 46 are provided.

Detection signals from the card detectors 43 and 46 are transmitted to the magnetic card issuing processing circuit 31 consisting of a microcomputer system.
It should be entered as follows. Similarly, the signal from the read-only magnetic head 44 is input to the magnetic card issuing processing circuit 31. Magnetic card issuing processing circuit 31
Each control command signal from the magnetic card issue processing circuit 31 is applied to a motor 47 that drives the rollers 32 to 37 and a take-out mechanism 41, and a write signal from the magnetic card issuing processing circuit 31 is applied to a write-only magnetic head 45. That's how it is.

FIG. 5 is a diagram showing a magnetic card 11 issued by a magnetic card issuing machine, and the data format is schematically shown in FIG. In this data format, "rSTX", "Issuing company name code", "Remaining number of times code", and rETXJ are recorded in the order of writing. rsTXJ
indicates the reading start direction, the "Issuing company name code" is a predetermined code with the name of the issuing company, and the "Remaining number code" is a code that indicates the number of times equivalent to the printed amount at the time of issue as value information. and rET, respectively.
XJ indicates the end of reading. Incidentally, the magnetic stripe 2' is provided with a blank portion, and the blank portion can be used as required.

FIG. 6 is a diagram showing a card-type game machine according to an embodiment of the present invention. The card-type game machine 50 has a casing 51 having a table-shaped external shape, and a CRT display 52 is displayed on the top surface of the casing 51. The upper surface is covered with a transparent plate 53 that protects the CRT display 52, and the housing 51
An operation panel 54 is provided on one side, and the operation panel 54 includes buttons 55 for start and operations necessary for operation, and buttons 55 for cancel and operation.
A game selection button 56 and a joystick 57 are provided, and a card insertion slot 58 is provided on the right side of the operation panel 54 as shown in the figure.
Insert the magnetic card 11 provided with the card type game machine 5.
This is a game designed to let you enjoy the game.

FIG. 7 shows a card reading/writing device 60 provided inside the card-type game machine 50.
8, a pair of rollers 61.62 are provided above and below in the figure, and a pair of rollers 63.6 are provided at regular intervals on the opposite side of the card insertion slot 58 to the pair of rollers 61.62.
4 are arranged above and below in the figure, and this pair of rollers 64.
A pair of rollers 65 and 66 are further disposed at regular intervals on the opposite side of the card insertion slot 58 from the card insertion slot 66, and these rollers are disposed on the same horizontal line. A card detector 67, a read-only magnetic head 68, and a read/write magnetic head 69 are provided between the rollers 61, 62 and 63, 64 from the card insertion slot 58 side. A card detector 71 is provided on the opposite side of the rollers 65 and 66 (the side opposite to the card insertion slot 5).

Detection signals from the card detectors 67, 71 are input to a control circuit 70 consisting of a microcomputer system. Similarly, read/write magnetic head 69
The signals from the control circuit 70 are inputted manually to the control circuit 70 in the same manner as described above. The signal from the read-only magnetic head 68 is separated into synchronization information D1 and position signal D2 by a waveform processing circuit 72, and the synchronization information Di and position signal D2 are supplied to the control circuit 70, respectively. The configuration of the waveform processing circuit 72 will be described in section a. Each control output from the control circuit 70 is connected to a read/write magnetic head 69 and a roller 61.
- 66, respectively, and can also be supplied to the game circuit 74 on the card-type game machine 50 side.

Card detection a67, (71) is a light emitting unit 67 that emits light.
a (71a) and an optical sensor part 67b (71b) that receives light from a light emitting part 67a (71a), and can detect 1° of a magnetic card by blocking the light. be.

On the other hand, on the right side of the rollers 65, 66 in the figure, a pair of rollers 76, 77 are arranged above and below the figure at a certain interval, and further to the right side in the figure with respect to the pair of rollers 76, 77. A pair of rollers 78 are arranged at a predetermined interval above and below in the figure.
．． 79 are arranged, and these rollers 76 (77) and rollers 7
A permanent magnet (or electromagnet) 80 is provided between the magnetic card 11 and the permanent magnet 80, and a small distance is provided between the permanent magnet 80 and the magnetic card 11.
．． A limit switch 82 is provided at a predetermined interval (slightly less than the length of the magnetic card l° in the longitudinal direction) to the right of these rollers 78 and 79 in the drawing. The switch 82 is connected to the control circuit 70.

Note that the punch mechanism that punches a predetermined hole in the magnetic card 1'' when the fee is reduced is omitted.
Rollers 61-66, 76-79 or rollers 61, 63.
65.76.78 or roller 62.64.66.7
7.79 can be driven, and the control 1
It is designed to be able to rotate in forward and reverse directions according to the control 4n drive signal from the ffH circuit 70.

FIG. 8 is a block diagram showing an example of the circuit configuration of the waveform processing circuit 72. An amplifier 83 is provided to amplify the signal from the read-only magnetic head 68, and the output from this amplifier 83 is sent to a limiter 84 and a detector 85. It is possible to supply - to. The limiter 84 is a circuit that eliminates a signal that is constant and exceeds a certain level to form a synchronizing signal DI. Further, the detector 85 is a circuit that extracts a specific signal from the signal from the amplifier 83, and is configured to be able to supply this specific signal to one input terminal of the comparator 86. The comparator 86 compares the reference value supplied to the other input terminal with the specific signal, and, for example, when the specific signal is larger than the reference value, II
II, and conversely, the signal D2 becomes 1°0'' when it is small.
This is a circuit that forms a

The operation of such an embodiment will be explained.

<Writing operation of synchronous information, etc.> The writing operation of synchronous information, etc. will be explained with reference to FIGS. 1, 2, 9, and 10.

The magnetic card l is transferred from the control circuit 18 to the card ejection mechanism 5.
At the same time, a command is issued to take out only one card, and the motor 17 is driven (step S100). Then, the magnetic card l stored in the storage section 4 is dropped onto the belt 8. The magnetic card l is conveyed on a belt 8, sandwiched between a pair of rollers 9, and further fed. When the leading edge of the magnetic card l is detected by the card detector 12 (step S101)
, synchronization information is supplied from the clock timing generation circuit 19 to the write-only magnetic head 13 (step S10
2). Then, the timing clock generation circuit supplies the signal shown in FIG.
The high frequency signal generated in
From there, a signal as shown in FIG. 9(B) is irradiated onto the magnetic stripe 3 of the magnetic card 1 (step 5IO4).

Next, it is determined based on the signal from the rotation detector 20 whether the magnetic card 1 has moved by a predetermined amount (step S10).
5) If it has moved a certain amount, it is determined whether the writing of a predetermined number of sheets has been completed or not (step S106); if it has not been completed, the process returns to step 5100; if it has been completed, the motor 17, clock timing generation circuit 19, The high frequency generation circuit 21 is stopped.

By operating in this manner, the synchronization information is recorded on the magnetic stripe 3 of the magnetic card 1 in a state where the amplitude of the synchronization information fluctuates by a certain number of times due to the high frequency signal, as shown in the 9th Z (C>). Such a magnetic card 1 will be supplied from a manufacturer to a service provider.

Magnetic Card Issuance> First, the magnetic card issuance operation of writing value information In to the magnetic card I will be described with reference to FIG.

FIG. 11 is a flowchart shown to explain the magnetic card issuing operation. A banknote is inserted into the banknote insertion slot 26 of the magnetic card issuing machine 25. (Step S200). The banknote processing mechanism 30 takes in the banknote from the insertion slot 26, determines the denomination, and displays the denomination on the display device 27 (step S).
201). Next, the banknote processing mechanism 30 determines whether the magnetic card issuing button 28A or the cancel button 28B is pressed (step S202), and when the cancel button 28B is pressed, the banknote processing mechanism 30 At step S203), the process is completed. When it is determined in step 5202 that the magnetic card issue button 28A has been pressed, the banknote processing mechanism 30 gives the "denomination" and "issuance command" to the magnetic card issue processing circuit 31 (step 5204). The magnetic card issuance processing circuit 31 drives the motor 47 and gives an ejection command to the ejection mechanism 41 for the magnetic card l of the denomination (step S205). The take-out mechanism 41 given the command takes out only one magnetic card l from the storage section 42, places it on the conveyor belt 40, and carries it to the rollers 36, 37 by the conveyor belt 40 (step S206).

When the magnetic card 1 is moved to the left in the figure by the rollers 36 and 37 and detected by the card detector 43 (step S
20? ), it becomes ready for writing. , after the magnetic card 1 is detected by the card detector 43, the timing clock is read out from the magnetic stripe 3 of the magnetic card 1 by the read-only magnetic head 44 (step 3208).
), necessary information and value information are written on the magnetic stripe 2 of the magnetic card 1 via this write-only magnetic head 45 (step 3209). When the writing to the magnetic card l is completed, the magnetic card issuing processing circuit 31 sends a notification to that effect.
to the banknote processing mechanism 30 (step S210).
. As a result, the magnetic card 1 becomes a magnetic card l on which necessary information is written.

Then, the end of the magnetic card 1' is inserted into the card detector 4.
6 (step S211), the motor 47 is stopped after a certain period of time has passed (step S212).
As a result, the magnetic card 1'' shown in FIG. 5 with necessary information written thereon is ejected into the tray 29. This magnetic card 1' is issued to the user. Note that if there is no synchronization information in step 3208, the process is terminated and the magnetic card l"
is stored in a predetermined location within the magnetic card issuing machine 25.

In addition, in the above explanation, value information is written based on the presence of synchronization information, but of course, value information may be written after confirming that there are a predetermined number of amplitude changes of the same 1iIII information in addition to synchronization information. Needless to say.

<Use of Magnetic Card> FIG. 7A12 is a flowchart shown to explain the operation of the embodiment of the present invention.

The magnetic card 1' issued by the magnetic card issuing machine 25 is inserted into the card insertion slot 5 of the card game machine 50 as shown in FIG. 6 (step S300).

When the magnetic card 1' is sandwiched between the rollers 61 and 62 and further inserted into the card detector 67, the optical sensor part 67b of the card detector 67 is blocked from light by the magnetic card 1'. By doing so, the magnetic card 1' can be detected (step S301). Then, a detection signal of the magnetic card 1' is supplied from the card detector 67 to the control circuit 7o, and the control circuit 70 rotates the rollers 61 to 66 by driving the motor 73 to detect the magnetic card 11. Send to the right (step 5302),
[Ki card 1' has rollers 61.62 and 63.6.
4. When passing the rollers 65.66, the rollers 61.6
A read-only magnetic head 68 is provided between the magnetic stripes 3, and a read/write magnetic strip 68 is provided between the read-only magnetic heads 68.
The timing clock written on the magnetic stripe 3 is read out when the two portions of the magnetic stripe come into sliding contact with the magnetic stripe 9 (step S303). magnetic stripe 3
The signals read out via the read-only magnetic head 68 are as shown in FIG. 13(a). This is input to the amplifier 83 of the waveform processing circuit 72 and amplified.

The output signal of the amplifier 83 is also in phase f or higher than that in FIG. 13(a). This output signal is supplied to a limiter 84 and a detector 85.

The limiter 84 changes the signal (Fig. 13 [a]) to Fig. 13 (
Separate the timing clock D1 as shown in b).

The detector 85 obtains the signal shown in FIG. 13(C) from the signal shown in FIG. 13(d) and supplies it to the comparator 86. The comparator 86 compares the signal in FIG. 13(c) with the reference value Es, and when the signal (FIG. 13(C)) is greater than the reference value Es, the I
Outputs I I II and outputs IT in other cases.
The output signal of this comparator 86 is the first
The signal is shown in Figure 2(d).

When the signals D1 and D2 from the waveform processing circuit 72 are detected (step S303), the information written on the magnetic stripe 2' is read based on this timing clock D1, and the waveform processing circuit 72 signal D from
2 are read and temporarily stored in the respective registers in the control circuit 70 (step 5303). Note that the signal D2 is added to the register. Magnetic card 1' is on roller 65.6
6 and when the 1° edge of the magnetic card is detected by the card detector 71, a signal is supplied from the card detector 71 to the control circuit 70. (Step S3)
05). The control circuit 70 determines whether or not the "issuer name code" temporarily stored in the register belongs to the company, and the signal D2.
It is determined whether or not a predetermined number of codes have been counted (step S 306), and if the signal D2 is a predetermined number, it is determined whether there is any remaining in the "remaining number code" (step S306). 307) In the case of the embodiment, as shown in FIG. 5, a magnetic card 1" issued by the company and never used is inserted, so the steps 111α of steps 8300 to 5307 are will be processed.

If the "remaining number of times code" temporarily stored in the register remains in step 5307, the "remaining number of times" is stored in the storage area M of the storage device in the control circuit 70 and the register is cleared (step 3308). .

Next, the use determination flag F in the control circuit 70 is set to 0.1 (step S309). ``The control circuit 70 issues a game enable command to the game circuit 74 (step S310).Then, the control circuit 70 receives a game start signal (step S311) or a cancel signal. (Step S312).Meanwhile, the game circuit 74 displays on the CRT display 52 that the game is available.

Here, when the user starts the game, the game circuit 7
Since the use start signal is supplied to the control circuit 70 from 4,
The control circuit 70 determines whether the contents of the storage area N (initially IT O11) for determining the number of times the game has been used is IT I
IT is added and the addition result is stored again in the storage area N (step S313). Then, in order to determine the usage state, II II II is placed in the flag F (step S314). Next, when the control circuit 70 receives the game end signal from the game circuit 74 (step S315), the control circuit 70 subtracts the contents of area N from the contents of storage area M, and the subtraction result is It is determined whether or not is zero (step S316), and if it is not zero, the process returns to step S310.

In the case of the embodiment, if the magnetic card 1'' that has never been used is inserted into the card game machine 50 and the game is played three times in a row, steps 8300 to S309 are performed, and steps 3310 to 3316 are executed three times. It has been repeated several times. Therefore, area M is 110″ and area N
It is clear that is '3''.

Next, when the user presses the selection box 56 of the card game machine 50 and a cancel signal is supplied from the game circuit 74 to the control circuit 70, the control circuit 70 sets the use determination flag F to Tj I. Determine whether IT is set (step S317), flag F is
Since the card type game machine 50 is activated even once, the control circuit 70 moves to step 8318 in this case. That is, by driving the motor 73, the rollers 61 to 66 are rotated to move the magnetic card 1' to the left in the figure (step 3318).

When the magnetic card 1' moves to the specified position, a timing clock D1 is displayed on the magnetic stripe 3 of the magnetic card 1'.
(step 3319), the control circuit 7
0 gives the read/write magnetic head 69 the result of subtracting the contents of the storage area N from the contents of the storage area M and records a new remaining number of times on the magnetic stripe 21 (step S
320). When the magnetic card 1' reaches a specified position, the control circuit 70 sends a punch mechanism (
A command is given to the solenoid (not shown) and motor 73, thereby punching a hole at a predetermined position in the magnetic card 1' (step S321). In the case of the example, since the card-type game machine 50 was used three times using the magnetic card 1' which was not used even once, naturally three puff holes were opened from the beginning (remaining number of times rlOJ). . In other words, punch holes will be punched at the remaining number of times "lO", "9j", and "8".

Next, when the magnetic card 1' is detected by the card detector 67 (step S322), the end of the magnetic card 1' on the opposite side from the card insertion 058 is detected by the card detector 67 (step S323). ), when this is detected, the control circuit 70 stops driving the motor 73 (step S324). About half of the magnetic card 1' protrudes from the card insertion slot 58. In addition, since the game was played three times using the magnetic card 1' which was not used even once, the magnetic card 1' had three punch holes P (rl
OJ, "9", "8") will be opened.

Then, the storage area MSN is cleared (step S325), and the series of processing is completed.

On the other hand, in step S303, it is determined that there is no timing clock D], and in step 5306, if the card is issued by another company and the signal D2 is a specified number, the control circuit 7
0, or if the control circuit 70 determines in step 5319 that there is no timing clock DI on the magnetic stripe 3, then in step 53
Move to 30. That is, in step 5330, the control circuit 70 drives the motor 73 to rotate the rollers 61 to 79 to carry the magnetic card 1' toward the card insertion slot 58, and then proceeds to step 5322. A small series of processing is performed.

Further, in step 8316, when the control circuit 70 determines that the result of subtracting the contents of the storage area N from the contents of the storage area M is zero, or in step S
When the control circuit 70 determines in step S307 that there is no remaining number of cents in the register, the control circuit 70 gives an "unavailable display" instruction to the game circuit 74 (step S340), and the control circuit 70 The motor 73 is driven to rotate the rollers 61 to 66 in the forward direction, and the magnetic card 1' is sent in the direction of the rollers 76 and 78, passing between the permanent magnet 80 and the iron plate 81 (step S341), and this operation is limited. The process continues until the switch 82 detects the end of the card 1'' (step S342). Next, the process moves to step 8318, where a series of subsequent processes are performed. 81, the recorded contents of the magnetic stripe 2.3 will be erased.

Note that once the magnetic card l° is inserted into the card insertion slot 58, if the cancel button of the selection button 56 is pressed, the process moves to a cancel operation, and after steps 3311 to 5312 are processed, the process moves to step S317, and step S317
In this case, since F=O, the process moves to step 5230. In the above-mentioned embodiment, a magnetic card 1' is used, which is inserted into the card slot 50 of the card game machine 50, and after the game is completed, the card is ejected again from the card slot 58. However, the present invention is not limited to this, and a type in which the insertion port and the discharge port are separate may be used.

Although the magnetic heads 44, 45 and 68, 69 are shown arranged on the left and right sides in the figure, they are arranged perpendicularly to the plane of the paper. Further, the magnetic head 44.
45, or magnetic heads 68 and 69 are shown separately,
It may be formed integrally with the magnetic heads 44, 45, or may be formed integrally with the magnetic heads 68, 69.

In the above embodiment, when there is a timing clock on the magnetic stripe 3 of the magnetic card 1, a necessary information note is written and a magnetic card 1' is issued, and when the issued magnetic card 1' is used, the magnetic stripe 3 The value information of the magnetic stripe card can be read only by a timing clock and a predetermined number of specific signals, and when the read value information has a remaining number of cards, it is possible to use a device such as a game machine, In addition to rewriting the remaining number of games at the end of the game on the magnetic stripe, punch holes are made in a predetermined area of the magnetic card according to the remaining number of times when the card is first inserted into the game machine and the number of times the game is used, and value information is also provided. When the magnetic stripe 2.3 runs out, the recorded contents of the magnetic stripe 2.3 are erased. Therefore, any device having such a configuration falls within the scope of this embodiment.

〔Effect of the invention〕

As described above, according to the present invention, information is written to other magnetic stripes only when there is timing information written to a specific magnetic stripe and the amplitude change of the synchronization information is a constant number. - Since the timing information is erased when the magnetic card can be read and there is no value information, it is completely possible to prevent unauthorized tampering or writing of information on the magnetic card, and to ensure that it is not used illegally. It has the effect of preventing

[Brief explanation of the drawing]

Fig. 1 is a diagram showing a state before writing of a magnetic card used in an embodiment of the present invention, Fig. 2 is a configuration diagram showing an example of the configuration of a synchronous information etc. writing device, and Fig. 3 is a diagram showing a configuration example of a writing device for synchronous information, etc. FIG. 4 is a block diagram showing the signal processing system of FIG. 3, FIG. 5 is a diagram showing the state of the magnetic card after writing, and FIG. 6 is a diagram showing the state of the magnetic card issuing machine according to the present invention. FIG. 7 is a block diagram showing a signal processing system of the game machine; FIG. 8 is a block diagram showing an example of the configuration of a waveform circuit; 9 is an operation waveform diagram of the synchronous information etc. writing device, FIG. 10 is a flowchart shown to explain the operation of the synchronous information etc. writing device, FIG. 11 is a flowchart shown to explain the magnetic card issuing operation, FIG. 12 is a flow chart shown to explain the operation of using a magnetic card, and FIG. 13 is a time chart shown to explain the operation of the waveform shaping circuit. l...Magnetic card, 2.3...Magnetic stripe, 2
5... Magnetic card issuing machine, 50... Card type game machine. Patent Applicant Computer Service Co., Ltd. Agent Patent Attorney Hibi Hiroaki Akira Figure 1 Figure 3 Figure 5 Figure 6 Figure 8 Figure 9 Figure 1

Claims (1)

[Claims] When a service, etc. is provided using a magnetic card having a magnetic recording medium on which value information is written, the payment is made, and each time the payment is made, the value information of the magnetic recording medium is reduced so that the value information becomes zero. In a magnetic card usage system that enables the use of magnetic cards, the magnetic card is provided with a magnetic recording medium on which synchronization information can be written, the synchronization information is written on the magnetic recording medium, and the synchronization information is written on the magnetic stripe. The amplitude of the synchronization information recorded on the magnetic stripe is made variable by irradiating electromagnetic waves to the synchronization information recorded on the magnetic stripe.
At least the synchronization information is used to write the value information,
A security system for a magnetic card, characterized in that when the magnetic card is used, value information is made valid on the condition that there is an amplitude of synchronization information in addition to the synchronization information.