JPH02123798A - Preventive structure of erroneous connection of circuit unit - Google Patents

Abstract

PURPOSE:To prevent physical connection to different kinds of circuit units by mutually fitting a binding article, in which triangular blocks obtained by dividing a cubic by the diagonal of a plan-view square into two are arrayed and fixed, and an article to be bound arrayed and fastened so as to form a cubic through combination. CONSTITUTION:A pair of triangular blocks acquired by dividing a cubic into two by the diagonal of a plane-view square is used, and a binding article A21, in which the bases of one triangular blocks 1a-2, 1b-2 of n pairs (n represents an integer) are aligned on a straight line and the triangular blocks are arranged and fixed, and an article to be bound B22 in which other triangular blocks 1a-1, 1b-1 are combined and disposed and fastened so as to shape a cubic are fitted mutually, and the binding article A21 and the article to be bound B22 are connected. Accordingly, fundamantal hookup drawings are replaced and used, and arrayed and mounted on the circuit unit side and the BWB side, thus acquiring the combination of 2<n> kinds, then preventing the erroneous connection of circuit units except the combination.

Description

[Detailed Description of the Invention] [Summary] Regarding the improvement of the structure for preventing incorrect connection of circuit units, the aim is to prevent circuit units of different types from being physically connected. A combination A in which a set of triangular blocks divided into two is used, and one triangular block of n sets (n is an integer) is arranged and fixed with the bases aligned on a line;
The other triangular block is combined with the triangular block to form a cube, and the combined object B is arranged and fixed, and the triangular blocks are fitted together to form the combined object A.
and the object to be coupled B are connected to each other.

[Industrial application field] The present invention relates to an improvement in a structure for preventing incorrect connection of a circuit board.

In electronic and communication equipment, circuit units, which have electronic circuits mounted on circuit boards, are arranged and stored on racks or box-shaped shelves. They are inserted and connected to socket connectors of a back wiring board (hereinafter abbreviated as BWB) fixed to the back surface of the board, and arranged and housed.

However, as circuit units are mounted at high density on racks and box-shaped shelves, the number and types of circuit units stored have increased, and there have been cases where circuit units have been incorrectly inserted and connected to socket and throat connectors. If the connection is made incorrectly, the power supply bin of the connector may be incorrectly connected and cause a short circuit failure, and it is desired to prevent this.

[Conventional technology]

The conventional circuit unit misconnection prevention structure standardizes the arrangement position of the connector's power supply bins according to the various power supply voltages used in the circuit unit, thereby preventing short-circuit failure even in the event of an incorrect connection. Connections are made while visually checking the markings that indicate the arrangement.

[Problem to be solved by the invention]

However, according to the above-mentioned structure for preventing incorrect connections, the types and number of circuit units to be stored, as well as the number of input signals, etc., increase as the density of mounting on racks and box-shaped shelves increases.
There was a problem in that it was difficult to unify the arrangement positions of various power supply bins between each circuit unit.

In view of the above problems, an object of the present invention is to provide a structure for preventing incorrect connection of a circuit unit that cannot be physically connected to a different type of circuit unit.

[Means to solve the problem]

In order to achieve the above object, in the circuit unit misconnection prevention structure of the present invention, a set of triangular pro-7s formed by dividing a cube into two along the diagonal of a rectangle in plan view is used, and nl (
A combined object A in which one triangular block (n is an integer) is arranged and fixed with the bases aligned on a line, and a combined object B in which the other triangular block is arranged and fixed in combination with the triangular block to form the cube. The triangular blocks are fitted together to connect the bonded object A and the bonded object B.

[Operation] As shown in the schematic diagram explaining the principle in Figure 1 (a>, (b)), the rectangle 1 is divided into two by one of the two diagonals 2a and 2b (a diagonal line downward to the right). can be done (a
) A set of triangles 1 in the figure. (b) A pair of triangles 1b-1 and 1b- in the figure, which are created by dividing the rectangle 1a consisting of a-1+1a-2 into two by the other diagonal 2b (upward-right diagonal).
It is divided into a rectangle 1b consisting of 2.

Figure 2 is a schematic diagram showing the combination of triangles, and ■ is a square 1.
One of the triangles 1a-L and 1a-2 in a pair of triangles 1a-L and 1a-2, for example, the right triangle 1a-1 (shaded area) and the left triangle 1a-2 (shaded) which is symmetrical with respect to its hypotenuse.
dotted shaded area), and each setting is “0”.
” and “1”, and ■ is a set of triangles 1 of square 1b.
A combination of one of the triangles b-1 and 1b-2, for example, the left triangle shown in the figure (shaded area) 1b-1, and the right triangle 1b-2 (dotted hatched area) that is symmetrical with respect to its hypotenuse. By calling the settings "0" and "1" respectively, two basic combination figures are obtained.

This combination is a pair of triangles 1a-1 and 1a-2 created by dividing the rectangle 1 along diagonals 2a and 2b, respectively.
and 1b-L 1b-2, so they cannot be combined even if they cross each other or turn 180'. That is, when the number n of squares is n=1, 2-2 combinations are possible.

Next, if n = 2 squares are arranged, as shown in Figure 3, the ■ setting is "00" (this is the ■ setting of "0" in Figure 2).
), ■ setting "01" (this can be done by arranging ■ setting aO" and ■ setting "1" in Figure 2), ■ setting "10" (this can be done by arranging two sets of ■Setting “1” in Figure 2
” and ■setting “0”), ■setting “11”
” (This can be done by arranging two sets of setting “1” in Figure 2), and by combining each with a figure (illustrated path) that is symmetrical about the hypotenuse of the triangle, 22 = 4 ways. You can make combinations.

Similarly, n sets of rectangles (n is an integer) are formed into triangles 1a-LIb.
By arranging the right angles of −1 along base line 2, we get 2
"2" combinations can be obtained, and normal connection between the circuit unit and the BWB can be guaranteed in 2" ways.

〔Example〕

The gist of the present invention will be explained in detail below based on embodiments shown in the drawings.

As shown in the perspective view of FIG. 4, the cube 11 is divided into two parts along the diagonal line 12 of a rectangular shape in plan view to form a pair of triangular blocks 13, namely 13a-1 and 13b-1, each with a mounting hole 14. Be prepared. The outer shapes of the triangular blocks 13a-1 and 13b-1 are the same.

Now, a case where n=2 using two sets of triangular blocks 13 will be taken up and explained using the perspective view of FIG. 5 showing the state before connection.

One of the two triangular blocks 13, 13a to L13b-1, is attached to the combined body A21, that is, the circuit unit side, as shown in FIG.
A mounting screw 2 is fitted into the housing 21a having a tapped hole (not shown) corresponding to the diagonally shaded triangle 1a-Llb-1.
After fixing with 1b, it is attached to the circuit unit 21. That is, the right angles of the triangular blocks 13a-L 13b-1 are arranged along the longitudinal side of the housing 21a.

On the other hand, on the side of the object B22 and the plate BWB, two sets of other triangular blocks 13, namely 13a-2 and 13b-2, are arranged in the circuit unit 21.
b-1 and are arranged so as to fit together, and the upper part thereof is protruded into a housing 22a provided with a threaded hole (not shown) and fixed with a mounting screw 22b.

Both housings 21a and 22a form a pair and are combined and connected by fitting the concave and convex portions formed by the triangular block 13 into each other.

The side view of FIG. 6 shows a state in which the circuit unit 21, which includes a housing 21a and a plug connector 21c, is plug-in connected to the BWB 22, which includes a housing 22a and a socket connector 22c.

In this way, by replacing the basic combination figure shown in Fig. 2 with triangular blocks and arranging and attaching them to the circuit unit side and the BWB side, 2'' combinations can be obtained, and the circuit unit This can prevent incorrect connections.

In addition, in the above explanation, the triangular block was installed so that the diagonal line triangle in Figure 2 ■■ is on the circuit unit side and the diagonal line triangle in Figure 2 ■■ is on the BWB side, but it can also be installed in the opposite way. It goes without saying that 2'' combinations can be obtained without any problem.

〔Effect of the invention〕

As described in detail above, according to the present invention, it is possible to guarantee normal connection of circuit units in 2'' ways, prevent short-circuit failure of the power supply, etc., and provide highly reliable electronic
It exhibits extremely useful effects in industry, such as being able to provide communication equipment.

[Brief explanation of drawings]

FIGS. 1(a) and 1(b) are schematic diagrams explaining the present invention in detail, FIG. 2 is a schematic diagram showing a combination of FIG. 1, and FIG.
4 is a perspective view of a triangular block according to the present invention, FIG. 5 is a perspective view of an embodiment of the present invention before connection, and FIG. 6 is a schematic diagram showing another combination of FIG. 1. FIG. 4 is a side view showing the state after the connection shown in FIG. 4; In the figure, 11 is a cube, 13, 13a-1, 13a-2 are triangular blocks, 14 is a mounting hole, 21 is a bonded object A (circuit unit), and 22 is a bonded object B (BWB). 1” “O” 00′” “01” “10” “11”

Claims (1)

[Claims] Using a set of triangular blocks (13) made by dividing a cube (11) into two along the diagonal line of a rectangle in plan view, one of the n sets (n is an integer) of triangular blocks (13a-1) is placed with its base on a line. Combined objects A (21) aligned and fixed and the other triangular block (13a-2) are connected to the triangular block (13a-1).
) and a bonded object B (22) arranged and fixed in combination to form the cube (11), and the triangular blocks (13a-1) and (13a-2) are fitted together to form the bonded object B (22). A structure for preventing incorrect connection of a circuit unit, characterized in that A (21) and an object to be coupled B (22) are connected.