JPH01123497A - Misinsertion preventing structure for electronic circuit board - Google Patents

Abstract

PURPOSE:To confirm the right insertion of a circuit board, and prevent misinsertion, by turning ON a display when a notch part terminals installed at notched parts and notch part power supply terminals installed on shelf side with different dimensions are connected. CONSTITUTION:When an electronic circuit board 1 is inserted in a right position in a shelf 3, power supply terminals 4 for electronic parts are connected with electronic parts terminals. At the same time, a notch part terminal 5A of the board 1 is connected with a notch part power supply terminal 4A, electric power is supplied to both the inputs of a gate circuit 6, and the output turns ON a display 7. When the board 1 is inserted in a false position, electric connec tion on the terminal 4 side is done, but notch dimension of the terminal 6A is different as to each board 1, so that the terminal 5A is not connected with the terminal 4A. Current is not deliverd to the circuit 6, and the display 7 is not turned ON. Thereby preventing misinsertion.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electronic circuit board used in an electronic exchange, and more particularly to a structure for preventing incorrect insertion of an electronic circuit board.

[Conventional technology]

2. Description of the Related Art Conventionally, an electronic exchange or the like is constructed by inserting and arranging a plurality of electronic circuit boards, each of which has electronic circuit components mounted thereon, into a shelf. FIG. 2 is a side view of this type of electronic circuit board 1 inserted into the shelf 3. As shown in the figure, a plurality of electronic circuit components 2 are mounted on the electronic circuit board 1, and by inserting these electronic circuit boards 1 into predetermined positions of the shelf 3, the electronic circuit components 2 arranged at the tip of the electronic circuit board 1 can be removed. A component power supply terminal (not shown) is connected to an electronic component power supply terminal 4 provided on the shelf side, and power is supplied to the electronic circuit component 2 through these terminals.

[Problem that the invention seeks to solve]

In the conventional electronic circuit board l mentioned above, each of the plurality of electronic circuit boards has the same size in the same electronic exchange, so each board can be inserted into other board insertion positions, and this This causes the problem of incorrect insertion, which tends to lead to malfunction of the electronic exchange.

The present invention provides an incorrect insertion prevention structure that can prevent incorrect insertion of an electronic circuit board, or display the incorrect insertion and immediately correct the incorrect insertion, thereby preventing incorrect insertion of the electronic circuit board. is intended to provide.

[Means for solving problems]

The structure for preventing incorrect insertion of electronic circuit boards of the present invention forms notches with different dimensions in each of a plurality of electronic circuit boards to be inserted into the same shelf, and the notches are provided with cut parts in which the electronic circuit boards are mounted. A notch terminal is provided to connect to the display device, and a notch power supply terminal is provided on the shelf side corresponding to this notch and has a different size and is connected to the notch terminal. When the notch terminal and the notch power supply terminal are connected, the indicator is turned on to confirm correct insertion.

〔Example〕

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

FIG. 1 is a side view of an embodiment of a structure for preventing incorrect insertion according to the present invention. In the figure, a plurality of electronic circuit components 2 are mounted on an electronic circuit board l. A plurality of electronic circuit boards 1 are stacked and each is inserted into a predetermined position within the same shelf 3. In addition, each electronic circuit board 1
An electronic component terminal (not shown) is provided at the tip of the board, and when the electronic circuit board 1 is inserted into the shelf 3, it is connected to the electronic component power supply terminal 4 provided on the shelf 3 side to supply power. is now being carried out.

Note that 8 is a stopper that fixes the electronic circuit board 1 to the shelf 3.

Here, a notch 5 is provided in a part of the upper end of each electronic circuit board 1, and a notch terminal 5A is formed here, and a notch power supply terminal 4A is formed in the corresponding shelf 3. has been set up. The dimensions of this notch 5 are different for each electronic circuit board 1, and the protruding dimensions of each notch power supply terminal 4A are correspondingly different. This notch terminal 5A and the electronic component terminal are connected to each input of a gate circuit (AND gate circuit) 6, and the output of this gate circuit 6 is connected to a light emitting device mounted on the base end side of the electronic circuit board vi1. An indicator 7 made of a diode or the like is connected.

Therefore, according to this configuration, when the electronic circuit board 1 is inserted into the correct position in the shelf 3, the electronic component power supply terminal 4 is connected to the electronic component terminal, and at the same time, the notch terminal 5A of the electronic circuit board 1 is connected to the electronic component terminal 4. is connected to the notch power supply terminal 4A, power is input to the re-input of the gate circuit 6, and the display 7 is lit by its output. This confirms that the electronic circuit board 1 has been inserted correctly.

On the other hand, if the electronic circuit board 1 is inserted into the wrong position on the shelf 3, electrical connection is made on the electronic component power supply terminal 4 side, but the notch size of the notch terminal 5A is different from that of each electronic circuit board. Since they are different, the notch terminal 5A is never connected to the notch power supply terminal 4A. Therefore, no current is output to the gate circuit 16, and the display 7 does not light up. This allows it to be determined that the electronic circuit board 1 has been inserted incorrectly, and by immediately correcting this, incorrect insertion can be prevented.

The indicator 7 may be connected between the notch terminal 5A and the ground, and may be configured to be turned on simply when the notch terminal 5A is connected to the notch power supply terminal 4A.

〔Effect of the invention〕

As explained above, the present invention forms notches with different dimensions in each of a plurality of electronic circuit boards inserted into the same shelf, and connects the notch terminals provided in the notches with the notch terminals provided in the notches. The display is configured to light up when the notch power supply terminals, which are provided with different dimensions on the shelf side corresponding to the recessed terminals, are connected, so the electronic circuit board can be placed in the correct position within the shelf. When the electronic circuit board is inserted, the indicator lights up, which has the effect of confirming the correct insertion of the electronic circuit board and preventing erroneous insertion.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side sectional view of an embodiment of the incorrect insertion prevention structure of the present invention, and FIG. 2 is a side sectional view showing a state in which a conventional electronic circuit board is inserted. ■...Electronic circuit board, 2...Electronic circuit components, 3...
・Shelf, 4...Power supply terminal for electronic components, 4A・
...Notch power supply terminal, 5...Notch, 5A...
Notch terminal, 6... Gate circuit, 7... Display, 8
...Stopper. Figure 1

Claims (1)

[Claims] (1) In an electronic device in which a plurality of electronic circuit boards are inserted into the same shelf and electrical connection between the two is made through a power supply terminal for electronic components, cut portions of different dimensions are formed in each of the electronic circuit boards. , This notch is provided with a terminal that connects to the display mounted on each electronic circuit board, and the shelf side corresponding to this notch has a notch with different dimensions connected to the notch terminal. A power supply terminal is provided,
A structure for preventing incorrect insertion of an electronic circuit board, characterized in that the indicator is turned on when the notch terminal and the notch power supply terminal are connected.