JPS61147386A - Ic card reader/writer - Google Patents

Abstract

PURPOSE:To operate plural IC cards normally with one reader/writer by selecting plural clock pulses different in frequency. CONSTITUTION:When the contact of an IC card is connected to the terminal 26 of the reader/writer, a set signal is outputted from a set detector 8, and the IC card is connected electrically to the device. Then, the first clock pulse oscillating means 6a is connected to the terminal 26 through a switching means 6a, and the first clock pulse having a frequency f1 is first outputted from a clock pulse generating circuit 6, and next, a reset signal and a start signal are outputted by a reset signal generating means 9. If the first clock pulse coincides with the specification of the IC card, this card outputs a signal in a standard transmission speed, and it is read normally by the reader/writer. If the first clock pulse does not coincide with it, a control means 1 outputs a signal to a switching signal generating means 6c to operate the switching means 6d, and another clock is supplied from the second clock pulse oscillating means 6b.

Description

[Detailed description of the invention] (Technical field) The present invention relates to an IC card reading and writing device.

(Prior Art) In order to manage a relatively large amount of employee information, as shown in FIG. A one-chip microcomputer 24 to be controlled is packaged in the form of a card, and contacts 25, 25, etc. are provided on one surface for connection to a reading number writing device, and the card is operated by receiving clock pulses from the IC card reading/writing device. IC
Cards are starting to be used.

By the way, although the data transfer speed and the arrangement of contacts in IC cards are becoming standardized, it is difficult to establish a unified standard for the frequency of clock pulses.

Therefore, users had to prepare dedicated reading/writing devices for each type of IC card, which hindered the spread of IC cards.

(Objective) In view of the above circumstances, it is an object of the present invention to provide an IC card reading/writing device that can operate IC cards having different clock pulse frequencies with a single device.

(Structure) Therefore, details of the present invention will be described below based on illustrated embodiments.

FIG. 3 shows an external appearance of a device showing an embodiment of the present invention, in which reference numeral 12 denotes a read/write control circuit (described later).
1), a keyboard 2 and a printer 3 are provided on the top surface, a display 4 is integrally provided on the back surface, and an IC card loading slot 16 is provided at the bottom of the front surface.

FIG. 4 shows an example of the above-mentioned IC card loading mechanism, and reference numeral 17 in the figure indicates a transport path 18 that guides the IC card while regulating at least one side and the - side of the IC card.
A first limit switch 20 is provided near the insertion slot 16 formed at one end to detect the tip of the IC card and drive an IC card transfer mechanism 19, which will be described later. A set detector 8 is provided which detects that the IC card is set at a prescribed position, stops the operation of the IC card transfer mechanism 19, and simultaneously lowers the contact head 21. Reference numeral 19 denotes the above-mentioned IC card transfer mechanism, in which the pressing rod 1 is rotatably supported at one end by a shaft perpendicular to the transfer direction and biased toward the transfer path 18 by a spring 19a.
The feed trochanter 19d is applied to the casing 19c compressed by 9b.
is rotatably mounted and connected to the motor 19f by a bell) 19e. Reference numeral 22 denotes a contact head elevating mechanism, in which the contact head 21 is attached to a solenoid 22a via an operating rod 22b, and is normally held in an upwardly pulled state by a coil spring 22c.

FIG. 1 shows an embodiment of an IC card reading/writing device, and reference numeral l in the figure is a control means that controls the operation of the reading/writing device, and the keyboard 2 also controls the operation of the reading/writing device based on input data. Printer 3. While outputting data to the display 4, it is configured to read data stored in the IC card via the transmitting/receiving means 5, and to store data in the IC card. Reference numeral 6 denotes a clock pulse oscillation means which is a characteristic part of the present invention, and includes clock pulse oscillation means 6a, 6b having frequencies f, f2, for example, whose source oscillation is a crystal oscillator, and a switching signal generator 6C1 switching means 6d.
The clock pulses of one of the frequencies are selected and output based on the signal from the control means l. 8 is a set detector that detects that the IC card is inserted from the loading slot 16 and loaded in a predetermined position of the reading/writing device; 9 is a reset signal generating means that oscillates a reset signal to activate the IC card; 10
．． 11 is a data reading means and a data output means.

Next, the operation of the apparatus configured as described above will be explained based on the flowchart shown in FIG.

When the IC card K is inserted into the card insertion slot 16 of the main body 12 of the device and the IC card K is moved to a predetermined position, the contacts 25, 25, etc. are connected to the terminals 26 of the reading/writing device.
connected to.

At this stage, a set signal is output from the set detector 8, and the I
The C card is electrically connected to the device. As a result, the first clock pulse generation means 6a is connected to the terminal 26 via the switching means 6d, and the clock pulse generation circuit 6 first outputs the first clock pulse having the frequency f1, and then the reset signal generation means The reset signal and start signal are output. This first clock pulse is I
When the IC card conforms to the standard of the IC card, the IC card outputs a signal at the standard transmission rate, for example, 9000 baud, and is normally read by the reading/writing device.

On the other hand, the frequency f1 of the first clock pulse oscillation means 6a
If the IC card does not meet the standard of the IC card, the IC card outputs a signal at a transmission rate outside the standard or does not operate at all.Thereby, the control means 1 outputs a signal to the switching signal generation means 6C. to actuate the switching means 6d, and a clock pulse from the second clock pulse oscillation means 6b having a frequency f2 is outputted to the terminal 26 via the switching means 6d, and then a reset signal and a start signal are outputted.
Drive the C card again. When this clock pulse of frequency f2 meets the IC card standard, the IC card outputs data at a predetermined transmission speed. As a result, the control means l determines that normal reading is being performed, and
Continue reading or writing data from the C card.

In this embodiment, the case where there are two types of clock pulse frequencies has been described, but it goes without saying that the present invention can be similarly applied to a case where there are three or more types of clock pulse frequencies.

(Effects) As explained above, according to the present invention, it is possible to select a plurality of clock pulses with different frequencies.
An IC card can be operated normally with one reading/writing device regardless of the clock frequency of the card.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an apparatus showing an embodiment of the present invention;
FIG. 2 is a flowchart showing the operation of the same device;
The figure is a perspective view showing the external appearance of the IC card reading/writing device, FIG. 4 is a sectional view showing an example of the IC card loading mechanism, and FIGS. FIG. 2 is a perspective sectional view and a block diagram shown in FIG. 2... Keyboard 3... Printer 6...
Clock pulse oscillation means 12...Reading/writing device body 16...IC card loading slot 23...Non-volatile memory 24...Microcomputer Applicant Tokyo Co., Ltd. Tatsuno Attorney Patent Attorney Keiji Nishikawa Katsuhiko Kimura Figure 1 Figure 3 Figure 4 Figure 5 (b)

Claims (1)

[Claims] An IC card reading/writing device in which a plurality of clock pulse oscillation means are connected to a clock pulse output terminal via a switching means, and the switching means are switched by the output of a switching signal generation means.