JPH0818258A - Preventing method for insertion error for printed board - Google Patents

Abstract

PURPOSE:To prevent the mechanical and electrical destruction of a board if it is inserted into a slot other than specified in an apparatus or a system. CONSTITUTION:An upper notch 23 is formed on one edge of a printed board 21 to be inserted into an enclosure, and a lower notch 24 is formed on the other edge. These notches are so formed that the length of the board insertion groove in the enclosure will be almost equal to that of the edge of the printed board to be inserted into the groove.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing mechanical and electrical damage when a board is inserted in a board other than a predetermined slot in a board constituting various devices and systems.

[0002]

2. Description of the Related Art In recent years, a printed circuit board on which electronic parts are mounted (hereinafter, simply referred to as "board") has become widespread as a means for realizing electronic circuits of various devices. Many are used.

FIG. 5 is a sectional view showing the structure of a conventional printed circuit board erroneous insertion device. In FIG. 5, the housing is provided with slots A and B into which two boards A and B can be mounted. Reference numeral 1 is a mother board in the housing. Reference numeral 2 is a metal fitting for mechanically pressing the motherboard board in the housing. 3 is a board guide pin for slot A provided on the metal fitting 2, 12 is a board guide pin for slot B provided on the metal fitting 2, 4 is a connector attached on the motherboard board 1, and is a board of the slot A Connection point, 11 is a connector mounted on the motherboard board 1, is a connection point with the board of the slot B, 5 is a board A for the slot A, 6 is a connector on the board 5 and is a motherboard board of the slot A 1 is a connector to be connected to the connector 4 mounted on 1, 6 and 7 are erroneous insertion mechanism parts in which a guide is provided at a position where the board guide pin 3 of the slot A can be fitted, and 7 and 8 are for slot B Boards B and 9 are connectors on the board 2 and connect to connectors 11 mounted on the motherboard board 1 in the slot B, and 9 and 10 are slots. Is erroneous insertion mechanism part 10 is provided with a guide in a position that allows the substrate guide pin 12 and the fitting bets B. Also, the board guide pins 3 for each slot
And 12 are mounted at positions different from each other.

The above configuration will be described in detail below together with its operation. When a board is inserted into a slot other than those specified in the maintenance and manufacturing stages of a system and equipment composed of multiple boards, the connectors on the motherboard board and the board are destroyed, and the electrical components on the board are electrically damaged. Cause destruction. Therefore, it is necessary to insert the board into another slot by the board guide pin 12 which is mounted on the erroneous insertion mechanism component 7 and the motherboard holding metal fitting 2 at different positions so that the board 5 cannot be inserted into the slot B. It is possible to prevent mechanical breakage of the slot B motherboard connector 11 and slot A board connector 6 and electrical breakage of electrical components on the board 5.

[0005]

However, in the above-mentioned conventional misinsertion countermeasure method, when the misinsertion mechanism part 7 for the slot A is mistakenly installed on the substrate 5 at the manufacturing stage, the misinsertion mechanism part 10 for the slot B is installed incorrectly. The board 5 is inserted into the slot B, and the motherboard connector 11 for the slot B and the connector 6 of the board A for the slot A are mechanically destroyed, and the electric components on the board 1 are destroyed.

The present invention solves such a conventional problem, and in particular, by providing a cutout on the board without attaching a special slot misinsertion mechanism component to the board, an error in the manufacturing process can be prevented. It is an object of the present invention to provide a printed board erroneous insertion device that prevents erroneous insertion in a cost-effective manner.

[0007]

In order to achieve the above object, the present invention provides a substrate having a peculiar cut on the substrate,
The board rail has the same length as the cutout of the board to prevent erroneous insertion.

[0008]

Therefore, according to the present invention, when a board other than the board defined by the board and the board rail having the same length as the board is intended to be inserted, Prevents erroneous insertion by making sure that the slot and the notch on the board make contact with the notch on the board before the motherboard connector and the connector on the board are mated, and the board does not enter until the end be able to.

[0009]

1 to 4 show the construction of an embodiment of the present invention.

This realizes an erroneous insertion prevention method when a plurality of (two in this case) printed circuit boards are inserted into the housing. Each printed circuit board has a structure that fits into a pair of board insertion grooves called rails, which are rails.

FIG. 1 is a block diagram showing a printed circuit board.
21 is a board A for slot A, 22 is a connector for board A,
Reference numeral 23 is an upper scribe provided on one (upper) line of the substrate 21, and 24 is a lower scribe provided on the other (lower) edge of the substrate 21.

FIG. 2 is a block diagram showing another printed circuit board. 25 is a board B for slot B, 26 is a connector for board B, 27 is an upper cutout provided on one edge of the board 25, and 28 is A lower score provided on the other edge of the substrate 25.

FIG. 3 is a view showing a bottom plate which constitutes the housing. 29 is a bottom plate, 30 is a slot A board rail (board insertion groove), and 31 is a slot B board rail.

FIG. 4 is a view showing an upper plate which constitutes a housing, 32 is an upper plate, 33 is a slot A board rail, and 34 is a board rail.
Is a board rail for slot B.

1 to 4, the boards cannot be inserted into the housing unless the cuts provided above and below the various boards and the lengths of the slot board rails above and below the housing match. It is possible to prevent physical and electrical breakdown. In addition, since a mechanical component for preventing erroneous insertion is not attached to the board, manufacturing errors can be prevented.

As described above, according to the above-described embodiment, a peculiarly shaped cutout is provided for each substrate, and slot rails having the same length as the upper and lower cutouts are arranged in the slot rails for accommodating the substrates. By doing so, it is possible to prevent insertion of parts other than the specified board, and it is also effective in terms of cost since no erroneous insertion countermeasure mechanism parts are individually required.

[0017]

According to the present invention, as is clear from the above-described embodiment, each board is provided with a peculiar cutout shape, and by using the rails of the same length as the board, which is defined on the housing side, Incorrect insertion can be prevented.

[Brief description of drawings]

FIG. 1 is a sectional view of a configuration showing a conventional printed circuit board incorrect insertion device.

FIG. 2 is a configuration diagram showing a printed circuit board in the printed circuit board wrong insertion device according to the embodiment of the present invention.

FIG. 3 is a diagram showing a housing bottom plate in the printed circuit board incorrect insertion device according to the embodiment of the present invention.

FIG. 4 is a diagram showing a housing upper plate in the printed board incorrect insertion device according to the embodiment of the present invention.

FIG. 5 is a view showing a conventional printed circuit board erroneous insertion device.

[Explanation of symbols]

 21 Board A for Slot A 22 Connector for Board A 23 Upper Cutting of Board A 24 Lower Cutting of Board A 25 Board B for Slot B 26 Board B Connector 27 Board B Upper Cutting 28 Board B Lower Cutting 29 Bottom Plate of Case 30 Board Rail for Slot A 31 Board Rail for Slot B 32 Case Top Plate 33 Board Board Rail for Slot A 34 Board Board for Slot B

Claims (1)

[Claims] 1. A method for preventing erroneous insertion when a plurality of printed circuit boards are inserted into a housing, wherein a plurality of pairs of board insertion grooves provided as a pair at the top and bottom of the housing are each provided. And one edge fits in the upper board insertion groove and the other edge fits in the bottom board insertion groove, and the corresponding board insertion groove length and the corresponding edge. A method for preventing erroneous insertion of a printed circuit board, characterized in that a cutout is provided on the edge portion so that the length of the portion is substantially the same.