JPH0330398A - Card rack - Google Patents

Abstract

PURPOSE:To prevent an electric circuit on a package from being damaged out by mistake at the time of mounting or demounting of the package by a method wherein a card rack is provided with an abnormality generation circuit, which receives an abnormal state signal from a detecting circuit, cuts off power supply to each circuit assembly board and at the same time, sends out the abnormal state signal to the outside. CONSTITUTION:A card rack is provided with a tactile sensor 1 to sense a state that circuit assembly boards are inserted, a detecting circuit 3, which receives the output of the sensor 1 and detects the abnormality of the inserted state, and an abnormality generation circuit 4, which receives an abnormal state signal from the circuit 3, cuts off power supply to each circuit assembly boards and at the same time, sends out the abnormal state signal to the outside. Thereby, by cutting off the power supply to the circuit assembly boards at the time of demounting of the circuit assembly boards, the trouble of damaging out an electric circuit on a package by mounting or demounting the package at the time of supply of a power supply to the card rack can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a card rack for preventing abnormalities in mounting and removing circuit assembly boards to be mounted.

[Conventional technology] A schematic diagram of a conventional card rack is shown in FIG.

This figure shows a card rack that can mount four circuit assembly boards (hereinafter referred to as package 8).
In reality, the number of packages that can be mounted is not specified, and there are card racks of various sizes depending on the number of packages that can be mounted.

In general, a carder 2 has a plurality of connectors 7 mounted on a back panel 9 as shown in FIG. 4, and wiring for connecting signals between the connectors 7 using electric wires or printed wiring. is being done. Also,
Power is supplied to the back panel 9, and this power is supplied to the connector 7 through wiring, and then to the package 8 mounted on the connector 7.

The package 8 has electrical components mounted on an insulating substrate and wired with electric wires or printed wiring to form an electrical circuit.

In this figure, the male contact 1 is placed on the insulating substrate of the package 8.
2 and directly insert the package 8 into the connector 7 to connect electrical signals, but some card racks also have a connector on the package and connect the electrical signals by connecting the connector.

Further, the card rack is provided with a guide rail 11 for the purpose of maintaining the distance between the mounted packages so that the packages 8 can be easily mounted.

[Problems to be Solved by the Invention] In the conventional card rack described above, packages can be freely attached and removed, so even when power is being supplied to the card rack, packages cannot be attached or removed. This is possible, but the drawback is that if the package is attached or removed, the electrical circuits on the package will be damaged.

The present invention has been made in order to solve the above-mentioned conventional problems, and an object of the present invention is to provide a card rack in which the electrical circuits on the package will not be damaged by mistake when the package is attached or removed. .

[Means for Solving the Problems] The present invention provides a card rack in which a plurality of circuit assembly boards are mounted and power can be supplied to each circuit assembly board.
A sensor that detects the inserted state of the circuit assembly board, a detection circuit that receives the output of the sensor and detects an abnormality in the inserted state, and cuts off the power supply to each circuit assembly board in response to the abnormal state signal from the detection circuit. It also has an abnormality generating circuit that sends out the abnormal state signal to the outside.

[Example] Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an outline of an embodiment of the present invention, and FIG.
The figure is a schematic sectional view of a connector using a sensor for detecting the insertion state according to an embodiment of the present invention, and FIG. 3 is a schematic diagram of a card rack according to an embodiment of the present invention.

Note that the same reference numerals are used for the same parts as in the prior art, and the explanation thereof will be omitted.

The back panel 9 has a connector 6 that uses a sensor to detect the insertion state (hereinafter referred to as the connector with a tactile sensor 6).
A package 8 is attached to the connector 6 with a tactile sensor. The tactile sensor 1 is attached to the connector 6 as shown in FIG. 2, and senses the insertion state when the package 8 is inserted in the direction of the arrow.

The back panel 9 has a power supply cable l that supplies power.
O and an abnormality detection circuit block 2 are attached.

The tactile sensor l is connected to the power supply wiring on the pack panel 9, and operates when power is supplied to the back panel 9. When the tactile sensor l operates, the package 8 inserted into the tactile sensor connector 6 as shown in FIG.
The detection circuit 3 senses the insertion state of the abnormality detection circuit block 2 and sends the result to the detection circuit 3 mounted in the abnormality detection circuit block 2. Detection circuit 3
receives the signal 100 from the tactile sensor l, and the package 8
It is determined whether the connector 6 is properly inserted into the connector 6, and if there is an abnormality, the result is sent to the abnormality generating circuit 4. The abnormality generating circuit 4 receives the signal 101 from the detection circuit 3, cuts off the output 102 of the power supply circuit 5, and sends an abnormal state signal 103 to the outside.

That is, by checking the insertion state of the package 8 with the connector 6 equipped with a tactile sensor, if the package 8 is inserted incorrectly or if an attempt is made to remove the package 8 by mistake while power is being supplied, the package 8 can be checked by stopping the power supply.
This can prevent damage to the upper electrical circuit.

[Effects of the Invention] As described above, the present invention includes a sensor that detects the insertion state of a circuit assembly board, a detection circuit that receives the output of the sensor and detects an abnormality in the insertion state, and an abnormal state of the detection circuit. By having an abnormality generation circuit in the card rack that cuts off the power supply to each circuit assembly board upon receiving the signal and sends the abnormal state signal to the outside, the power supply to the circuit assembly board can be cut off when the circuit assembly board is removed. This has the effect of preventing accidents that could damage the electrical circuits on the package due to installing or removing the package while power is being supplied to the card rack. .

[Brief explanation of drawings]

FIG. 1 is a block diagram schematically showing an embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of a connector using a sensor for detecting the insertion state according to an embodiment of the present invention. FIG. 3 is a schematic diagram of a card rack according to an embodiment of the present invention. FIG. 4 is a schematic diagram of a conventional card rack. l: Touch sensor 2: Abnormality detection circuit block 3: Detection circuit 4: Abnormality generation circuit 5: Power supply circuit 6: Connector using a sensor that detects insertion state 7: Connector 8: Package 9: Back panel 10: Power supply cable 11 Ni guide rail 12: Male contact 100: Signal from tactile sensor 1 101: Signal from detection circuit 3 103: Abnormal state signal

Claims (1)

[Claims] A card rack that mounts a plurality of circuit assembly boards and can supply power to each circuit assembly board has a sensor that detects the insertion state of the circuit assembly board, and a sensor that detects an abnormality in the insertion state based on the output of the sensor. A card characterized in that it has a detection circuit that detects an abnormal state, and an abnormality generation circuit that receives an abnormal state signal from the detection circuit, cuts off power supply to each circuit assembly board, and sends the abnormal state signal to the outside. rack.