JPH0374072A - Card insertion inspection method - Google Patents

Abstract

PURPOSE:To lower terminal use times of a connector and a small-size card by forming a matrix circuit having a connector which is connected with each of small-size card and in which a card insertion inspection switch is built in. CONSTITUTION:A driving circuit 1 selects only one Y-direction driving line at a certain time among driving lines Y1-Yn by N-ary counter 3 and a decoder 5 and sends a 'low level' signal to all inspection switches 8 in X-direction. An inspection circuit 2 scans the level of detection lines X1-Xm in the X direction in order and selects them by an M-ary coded counter 4 and a selector 6 and sends it as insertion condition signal to a reference circuit 7. As a result, the reference circuit 7 receives the Y-direction selected signal from N-ary counter 3, the X-direction selected signal from the M-ary coded counter 4, and the insertion condition signal and recognizes insertion condition of each of small-size cards 21 put in the X-Y matrix. In this way, terminal use times can be de creased.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for monitoring card insertion of small cards when a plurality of small cards are mounted on a large card using connectors.

[Conventional technology]

Conventionally, in this type of card insertion monitoring system, as shown in FIG. Ground air 55 is connected and a "low level" voltage level is detected. Any small card 54
If it is not mounted, the connection path with the earth 55 is cut off, so the detection circuit 60 is connected to the power supply and the voltage level is set to "high level" via the pull-up resistor 52 and buffer 51.
is detected. In other words, the detection circuit 50 monitors whether the small card 54 is mounted or not mounted by detecting the voltage level value.

[Problem to be solved by the invention]

In the case of the conventional card insertion monitoring method described above, as shown in FIG.
No matter which small card 54 is not mounted, the same voltage level is detected as "high level" by the detection circuit 50.
There are problems in that it is not possible to monitor the position of which card has been removed, and that terminals for connecting each connector 53 and each small card 54 in series are used to monitor card insertion.

An object of the present invention is to provide a card insertion monitoring system that solves the above problems.

[Means to solve the problem]

The card insertion monitoring method of the present invention is a card insertion monitoring method for monitoring the removal of a small card from a large card that is fixedly equipped with a connector for inserting a small card and connecting an electric circuit. a drive circuit that has a monitoring switch that detects card insertion and forms a matrix on the large card, and that sends a control signal to the monitoring switch for each row of connectors arranged on the matrix;
It has a monitoring circuit that reads the monitoring switch status of each connector.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

Fig. 1 is a system diagram showing one embodiment of the present invention, and Fig. 2 is a schematic diagram showing an embodiment of the present invention.
Fig. 3 is an explanatory cross-sectional view of the connector showing an example when the small card in Fig. 2 is removed, and Fig. 4 is an external perspective view showing an example of a card configuration suitable for the card configuration. FIG. 2 is an explanatory cross-sectional view of the connector showing an example of a state in which a card is inserted.

First, as shown in FIG. 1, this system has a drive circuit 1 and a monitoring circuit 2, as well as a monitoring switch 48 and a diode 9 forming a matrix circuit.

As shown in FIG. 2, a small card 21 is inserted into a connector 22 arranged on a matrix and connected to a large card 23. Drive circuit l and monitoring circuit 2 in Fig. 1
is built into the large card 23, but may be centrally located outside. Also, the monitoring switch 48 and the diode 9
are built into each connector 22 and arranged in a matrix for convenience of connection.

As shown in FIG. 3, the connector 22 in which the small card 21 is not inserted opens the contact of the monitoring switch 48 to disconnect the electric circuit.

As shown in FIG. 4, the connector 22 into which the small card 21 is inserted forms an electric circuit in which the contact of the monitoring switch 8 is closed and the diode 9 is inserted in series. The functions will be explained with reference to the figures.

First, the drive circuit 1 is composed of an n-ary counter 3 and a decoder 5. The monitoring switch 8 is built into a connector 22 arranged on the matrix. The monitoring circuit 2 is m
Advance counter 4. It is composed of a selector 6 and a verification circuit 7. The drive circuit 1 selects only one Y-direction drive line from the drive lines Yl-Y at a certain time using the n-ary counter 3 and the decoder 5, and switches all the X-direction monitoring switches 8 when the signal is 'low level'. When the small card 21 is inserted and the monitoring switch 8 is in a conductive state, the monitoring circuit 2 receives a "low level" signal through the detection lines x1 to X.

The monitoring circuit 2 sequentially scans and selects the levels of the detection lines X1 to X in the X direction using the m-ary counter 4 and the selector 6.
It is sent to the verification circuit 7 as an insertion status signal. Therefore, the collation circuit 7 receives the Y-direction selection signal from the n-ary counter 3), the X-direction selection signal from the m-ary counter 4, and the insertion status signal, and the small card 21 is arranged on the X-Y matrix. Recognize each insertion status.

〔Effect of the invention〕

As explained above, the present invention forms a matrix circuit by incorporating a monitoring switch for monitoring card insertion into the connector connected to each small card.
This has the effect of reducing the number of terminals used for connectors and small cards, and by monitoring the card insertion monitoring system using an X-Y matrix, the position of card removal can be known.

[Brief explanation of drawings]

Fig. 1 is a system diagram showing an embodiment of the card insertion monitoring system of the present invention, Fig. 2 is an external perspective view showing an embodiment of the configuration shown in Fig. 1, and Fig. 3 is a small-sized card shown in Fig. 2. FIG. 4 is a sectional view showing an example of the connector when the small card of FIG. 2 is inserted. FIG. 5 is a schematic diagram showing an example of the conventional connector. 1... Drive circuit, 2... Monitoring circuit, 3
...N-ary counter, 4...M-ary counter, 5...Decoder, 6...Selector, 7...Verification circuit, 8 ...Monitoring switch, 9...Diode, 21...Small card, 22...Connector, 23...
large card.

Claims (1)

[Claims] In a card insertion monitoring method for monitoring the removal of a small card from a large card that is fixedly equipped with a connector for inserting a small card and connecting an electric circuit, a monitoring switch is provided to detect insertion of a small card in which the connector is normal. forming a matrix on the large card, and having a drive circuit that sends a control signal to the monitoring switch for each row of connectors arranged on the matrix, and a monitoring circuit that reads the status of the monitoring switch of each connector. A card insertion monitoring method characterized by: