JPH0439995A - Printed board unit connecting device - Google Patents

Abstract

PURPOSE:To prevent erroneous insertion of a printed board unit by providing a hole opened at a backboard of a shelf and a protrusion from the unit. CONSTITUTION:A plurality of through holes 4 are opened at predetermined positions in alignment with the edge of an insertion end of a printed board unit 1. A plurality of protrusions 5 protrude forward at positions corresponding to the positions of the holes 4 of a backboard 3 at the outer edge of the insertion end of a printed board 6. A first connector 10 is connected to a second connector 20 only when a predetermined correct type of printed board unit 1 is inserted into a slot 2a.

Description

[Detailed Description of the Invention] [Summary] A printed board unit connecting device for connecting a large number of printed board units on which electronic circuits are formed by inserting them into slots of a shelf, which reliably prevents incorrect insertion of printed board units. However, with the aim of reducing manufacturing costs, a first connector is provided on the printed board unit, and
In the printed board unit connecting device, the shelf is provided with a second connector, and the first connector and the second connector are connected by inserting the printed board unit into a predetermined slot of the shelf. One or more holes are bored in the backboard of the shelf, and one or more protrusions that can be inserted into the holes are provided protruding from the insertion tip of the printed board unit in correspondence with the positions of the holes. , the first connector and the second connector are configured to be connected when all of the protrusions are inserted into the holes.

[Industrial application field]

The present invention relates to a printed board unit connecting device for connecting a large number of printed board units each having electronic circuits formed thereon by inserting them into slots of a shelf.

In information communication devices and many other electronic devices, a large number of printed circuit board units are inserted into predetermined slots of a shelf for each function to be accommodated and connected. In this case, if a given printed circuit board unit is not correctly inserted into a given slot, the device will not only not work properly, but it will also damage the very expensive printed circuit board unit circuitry and possibly have a serious negative impact on the entire system. It may even affect you.

However, if the insertion of the printed board unit relies on human judgment, erroneous insertion is likely to occur, so it is necessary to have a structure that prevents erroneous insertion.

[Conventional technology]

FIG. 5 shows a conventional printed board unit connecting device.

A removable key 82 is provided on the side wall of the housing of the concave first connector 81 provided in the printed board unit 80.
A plurality of key grooves 83 are formed for attaching. On the other hand, a plurality of notches 93 are formed in the side wall of the housing of the convex second connector 92 provided on the backboard 91 of the shelf 90, which can be cut out using a jig or the like.

Then, if the printed board unit 80 is inserted into the shelf 90 and the key 82 of the first connector 81 does not engage with the notch 93 of the second connector 92, the first connector 81 and the second connector 92 will be disconnected. It is no longer connected.

Therefore, depending on the function of the printed board unit 80,
The key 82 can be installed by matching the position of the notch 93 with the cutout position of the notch 93.
erroneous insertion is prevented.

[Problem to be solved by the invention]

However, since it is difficult to automate the work of providing keys and notches on the side walls of the housings of each connector 81, 92, it must be done manually. Therefore, a work error occurs during the process, and a product is manufactured in which the key 82 is installed in an incorrect position or the notch 93 is removed in an incorrect position, resulting in incorrect insertion.

Further, it takes a lot of man-hours to manually attach the key 82 and form the notch 93 while selecting the position, which increases manufacturing costs.

SUMMARY OF THE INVENTION An object of the present invention is to provide a printed board unit connecting device that eliminates such conventional drawbacks, reliably prevents incorrect insertion of printed board units, and is inexpensive to manufacture.

[Means to solve the problem]

In order to achieve the above object, the printed board unit connecting device of the present invention provides a printed board unit 1 on which an electronic circuit is formed, as shown in FIG. 1 for explaining an embodiment.
By providing a first connector lO on the shelf 2, and providing a second connector 20 on the shelf 2 for inserting and accommodating the printed board unit 1, the printed board unit l is inserted into a predetermined slot of the shelf 2. In the printed board unit connecting device in which the first connector IO and the second connector 20 are connected, one or more holes 4 are bored in the backboard 3 of the shelf 2, and One or more protrusions 5 that can be inserted into the holes 4 are provided protruding from the insertion tip of the printed board unit 1 in correspondence with the positions of the holes 4, and the protrusions 5
The first connector IO and the second connector 20 are connected when all the connectors are inserted into the hole 4.

Incidentally, the protrusion 5 can be formed on the outer edge of the sixth printed circuit board of the printed board unit (2).

[Effect]

When the positions of the protrusions 5 protruding from the printed board unit l match the positions of the holes 4 drilled in the backboard 3 of the shelf 2, and all the protrusions 5 are inserted into the holes 4. Only the first connector 10 and the second connector 20 are connected.

〔Example〕

Examples will be described with reference to the drawings.

In FIG. 2, ``■'' is a printed board unit on which electronic circuits including a large number of semiconductor elements are wired, and in principle, one printed board unit 1 performs one function.

2 is a shelf for inserting and accommodating a large number of printed board units l. A large number of slots 2a into which one printed board unit 1 is inserted are arranged in the shelf 2. In FIG. 1, the printed board units 1 are inserted into most of the slots 2a, and the printed board units 1 are not inserted into only some of the slots 2a.

FIG. 1 shows a state in which the printed board unit 1 is inserted halfway into one slot 2a. On the insertion end side of the printed board unit l, there is a concave first connector l connected to the electrical wiring of the printed board unit l.
O is provided.

Further, a convex second connector 20 is provided on the backboard 3 that stands upright so as to close the back of the shelf 2, and the first connector lO and the second connector 20 are connected to each other. It is formed so that it can be connected. 25 is a large number of contact pins erected on the second connector 20.

A plurality of through holes 4 are bored in the backboard 3 of the shelf 2 at predetermined positions in alignment with the edge of the insertion tip of the printed board unit I. The through hole 4 can be drilled with high precision and quickly by an automatic processing machine such as an NC processing machine, and is bored at different predetermined positions depending on the function of the printed board unit l inserted into the slot 2a. ing.

In the case of this embodiment, for example, a total of six predetermined positions, three on the upper and lower sides, are determined, and a through hole 4 is inserted in each of the predetermined positions.
The drilling pattern of the through hole 4 is changed depending on whether or not the through hole 4 is drilled.

On the other hand, a plurality of protrusions 5 are provided on the outer edge of the insertion tip of the printed board 6 of the printed board unit l to protrude forward. This protrusion 5 is provided in a protruding manner at a position corresponding to the position of the through hole 4 of the backboard 3, can be inserted into the through hole 4, and can be formed by an automatic processing machine.

In the printed board unit connecting device of the above embodiment configured in this way, when the correct printed board unit l is inserted into the predetermined slot 2a, as shown in FIG. is through hole 4
The first connector 10 and the second connector 20 are connected.

If a printed board unit 1 of a different type than the predetermined printed board unit l is inserted into the slot 2a by mistake, the printed board unit 1 will be inserted into the slot 2a as shown in FIG.
Since the protruding position of the protrusion 5 does not match the drilling position of the through hole 4 of the slot 2a, the tip of one protrusion 5a hits the backboard 3, and the printed board unit 1
can no longer be inserted into that slot 2a. Therefore, the first connector IO and the second connector 20 are not connected.

In this way, the first connector IO and the second connector 20 are connected only when a predetermined correct type of printed board unit 1 is inserted into the slot 2a.

Note that the present invention is not limited to the above embodiments,
For example, only one through hole 4 and a plurality of protrusions 5 may be provided, or a blind hole may be provided instead of a through hole.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the embodiment; Fig. 2 is an overall schematic diagram of the embodiment; Fig. 3 is an explanatory diagram of the operation of the embodiment; Fig. 4 is an explanatory diagram of the operation of the embodiment; The figure is a perspective view of a conventional example. [Effects of the Invention] According to the printed board unit connecting device of the present invention, incorrect insertion of the printed board unit can be prevented by the hole drilled in the backboard of the shelf and the protrusion provided on the printed board unit. These holes and protrusions can be easily and error-free formed by an automatic processing machine without relying on human hands. Therefore, accidents caused by incorrect insertion of the printed board unit can be completely prevented. Moreover, since no special equipment or parts are required to prevent incorrect insertion, manufacturing costs are extremely low, and costs can be significantly reduced compared to conventional methods. In the figure, 1... Printed board unit, 2 - Shelf, 3... Backboard 4... Through hole (hole), 5... Projection, IO... First connector, 20. ...Second connector.

Claims (2)

[Claims] 1. A first connector (10) is provided on the printed board unit (1) on which an electronic circuit is formed, and a second connector (20) is provided on the shelf (2) for inserting and accommodating the printed board unit (1). a printed board, wherein the first connector (10) and the second connector (20) are connected by inserting the printed board unit (1) into a predetermined slot of the shelf (2). In the unit connection device, one or more holes (4) are bored in the backboard (3) of the shelf (2), and one or more projections (5) insertable into the holes (4). is provided protrudingly at the insertion tip of the printed board unit (1) corresponding to the position of the hole (4), and when all the projections (5) are inserted into the hole (4), the first A printed board unit connecting device characterized in that a connector (10) and a second connector (20) are connected to each other. 2. The protrusion (5) is connected to the printed board unit (1)
The printed board unit connecting device according to claim 1, wherein the printed board unit connecting device is formed on the outer edge of the printed board (6) itself.