JPH07200113A - Bus system - Google Patents

Abstract

PURPOSE:To connect a bus board to all connectors of a back plane by enabling the sizes of the bus board and a subboard, which are mounted, to be selected among plural sizes. CONSTITUTION:This bus system is equipped with the bus board 12 having a lever 13 which is provide on one of opposite sides of a printed board turnably in the parallel direction of the printed board and supported at the center of the turning as a fulcrum and has a force point and an acting point and a terminal provided on the other side of the printed board provided with the lever 13, and a rack 14 which is provided with a connector 16 where the terminal of the bus boar 12 is inserted and connected on the bottom surface in a housing and also provided with a guide rail 15 where the other side of the bus board 12 is guided and inserted on the flank inside the housing, and, a pressing part which the acting point of the lever 13 of the bus board 12 is pressed against, is provided along the guide rail 15 of the rack 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bus system.

[0002]

2. Description of the Related Art In recent years, a bus system has been widely used for control equipment including a computer and a microcomputer.

A conventional bus system will be described below with reference to the drawings. FIG. 2 is a diagram showing the configuration of a conventional bus system. In FIG. 2, the bus system includes a backplane 21, a standard size bus board 22, a lever 23, a rack 24, and a guide rail 2.
5, a point 26 serving as a fulcrum of the lever, a connector 27, a bus board 28 having a size smaller than the bus board 22 in the width direction of the slot, a component 29 for supporting the guide rail 25 for mounting the bus board 28, and a depth. It is composed of a bus board 30 which is small in the direction and a sub board 32 whose total length connected to the bus board 30 by a connector 31 matches the depth of the slot.

In the above structure, the rack 24 and the guide rail 25 form a slot, the bus board 22, the bus board 28, and the bus board 30 are inserted into the slots and connected to the backplane board 21 via the connector 27. . In addition, the lever 23 allows the bus board 22 and the bus board 28 to be removed.

[0005]

However, in the conventional bus system as described above, since there is only one set of the fulcrum of the lever for each slot, the bus board having a short depth direction is surely mounted. I can't. If a small bus board is strongly mounted in the depth direction, there is no fulcrum of the lever for that purpose, which makes it difficult to insert and remove.

As a method of mounting a bus board smaller than the standard size, as shown in FIG. 3, there is also a method of mounting the bus board by keeping the dimension in the depth direction unchanged and shortening the dimension in the vertical direction. In order to connect to the backplane, a standard size bus board can be connected with two connectors, while a bus board smaller than the standard size must be connected with one connector. .

Further, as shown in FIG. 4, when the bus board is mounted using the sub board, when the sub board and the bus board are integrated, the insertion / removal can be performed by the lever of the sub board. You can, but if you are not integrated, when you remove the sub board, the bus board may remain connected to the backplane,
It is very difficult to remove the bus board in this state because there is no fulcrum of the lever.

The present invention solves the above problems, and an object of the present invention is to allow a plurality of sizes of bus boards and sub boards to be mounted in a bus system, and for the bus boards to be connected to a backplane by all signals.

[0009]

In order to achieve the above object, the present invention is provided on one of opposite sides of a printed circuit board, and is rotatably provided in a direction parallel to the printed circuit board. A bus board having a lever having a center as a fulcrum, having a force point and an action point, and a terminal provided on the other side of the printed circuit board on which the lever is provided, and the bus board on the bottom surface inside the housing. And a rack provided with a guide rail into which the other opposite side of the bus board is inserted and guided on a side surface inside the housing, and a lever for the bus board lever. Is a bus system in which a pressing portion pressed by the action point is provided along the guide rail of the rack.

[0010]

With the above-described structure, by providing a portion serving as a point of action for each type of bus board size, it becomes possible to easily mount a plurality of sizes of bus boards and sub-boards on the bus system.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

(Embodiment 1) In FIGS. 1 and 2, the bus system includes a backplane 11, a bus board 12, a lever 13, a rack 14, and a first pressing force at the end, which is the point of action of the first lever. The portion 17 and the second pressing portion 18 serving as the operating point of the second lever, and the third pressing portion 19 serving as the operating point of the third lever in the center, and the guide holding when mounting the bus board 12 Guide rail 15 and connector 16
And the sub board 20.

That is, the lever 13 is provided on one of opposite sides of the printed circuit board, is rotatably provided in a direction parallel to the printed circuit board, and has a center of rotation as a fulcrum, and a lever 13 and a lever. A bus board 12 having terminals provided on the other side of the printed circuit board on which the board 13 is provided, and a connector 16 into which the terminals of the bus board 12 are inserted and connected are provided on the bottom surface inside the housing. A rack 14 having guide rails 15 for guiding and inserting other opposite sides of the bus board 12 is provided on a side surface inside the body, and pressing portions 17 to 19 pressed by an action point of a lever 13 of the bus board 12 are provided. The rack 14 is provided along the guide rails.

Further, a plurality of pressing portions 17 to 19 are provided so that the operating point of each lever 13 can be pressed in various bus board sizes.

In the above structure, the rack 14 and the guide rail 15 form a slot, and the bus board 12
Is inserted into the slot along the guide rails 15, the terminals of the bus board 12 are connected to the connectors 16 of the rack 14, and the insertion of the bus board 12 is completed.

Next, the bus board 12 is removed by pressing the operating point of the lever 13 of the bus board 12 against any of the pressing portions 17, 18 or 19 on the guide rail 15 to connect the terminals of the bus board 12 to the connector 16. It can be achieved by removing it from the main body and removing it along the guide rail 15. This allows the lever 13 to insert and remove the bus board 12 into and from the slot.

If the first pressing portion 17 at the end of the guide rail 15 is used, a standard size bus board can be mounted.

Next, by using the third pressing portion 19 at the center of the guide rail 15, a half size bus board which is half the standard size can be mounted.

Further, the backplane 11 and the bus board 1
The connection with 2 is 2 regardless of the size of the bus board 12.
It can be connected using the individual connectors 16.

(Embodiment 2) In FIG. 3, the main structure is the same as that of (Embodiment 1). In this embodiment, the bus board 12 is mounted using the sub board 20.

Here, the size of the sub board 20 is selected according to the pressing portion 17 or 18. That is,
It is characterized in that a plurality of bus boards and a connector for electrically and mechanically connecting the bus boards to each other are provided.

Here, the method of inserting the sub-board 20 and the insertion / removal of the bus board 12 can be reliably and easily performed by using the action point of the lever and the pressing portion according to the procedure described in (Embodiment 1).

Thus, according to the present invention, the bus board 1
The size of 2 and the sub board 20 can be selected from a plurality of smaller ones so as to correspond to the pressing portion, the cost of the boards of the bus board 12 and the sub board 20 can be reduced, and the insertion and removal can be performed. Certainly easy to do. Further, since the bus board 12 can be connected to all the connectors 16 of the backplane 11, the function and design are not restricted by the signal connection.

Although three sets of pressing portions are provided for each slot in the embodiment, two sets or four sets or more may be provided at arbitrary positions. Further, although the pressing portion is constituted by the guide rail in the embodiment, the rack itself may be provided with a hole or the like so as to have the function of the pressing portion, or may be constituted by a component attached to the rack or the guide rail.

[0025]

As described above, according to the present invention, bus boards of a plurality of sizes can be easily inserted into and removed from the rack. In addition, the size of the mounted bus board and sub board can be selected from a plurality of combinations, the cost of the board of the bus board and the sub board can be reduced, and insertion / removal can be reliably and easily performed. . Furthermore, since the bus board is connected to all connectors on the backplane, the signal connection does not limit the function or design.

[Brief description of drawings]

FIG. 1A is a top view of a bus system according to an embodiment of the present invention, and FIG. 1B is a front view of the same.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB in FIG.

FIG. 4A is a top view of a conventional bus system, and FIG. 4B is a front view of the same.

FIG. 5 is a sectional view taken along line CC of FIG.

FIG. 6 is a cross-sectional view taken along line DD of FIG.

FIG. 7 is a sectional view of a conventional bus system when a sub board is used.

[Explanation of symbols]

 11 Backplane 12 Bus Board 13 Lever 14 Rack 15 Guide Rail 16 Connector 17 First Pressing Part 18 Second Pressing Part 19 Third Pressing Part 20 Sub Board

Claims (2)

[Claims] 1. A lever provided on one of opposite sides of a printed circuit board, rotatably provided in a direction parallel to the printed circuit board, having a center of rotation as a fulcrum, and having a force point and an action point, A bus board having a terminal provided on the other side of the printed circuit board on which the lever is provided, and a connector into which the terminal of the bus board is inserted and connected are provided on the bottom surface inside the housing, and the housing is provided. A rack provided with guide rails for guiding and inserting other opposite sides of the bus board on an inner side surface, and a pressing portion pressed by an action point of a lever of the bus board is provided along the guide rails of the rack. The bus system installed. 2. The bus system according to claim 1, further comprising a plurality of bus boards and a connector for electrically and mechanically connecting the bus boards to each other.