JPH03215996A - Printed circuit board mounting equipment - Google Patents

Abstract

PURPOSE:To enable a printed board to be mounted on a chassis accurately controlling the board in both a longitudinal and a lateral direction without using bent pieces by a method wherein the movement of the printed board in a vertical direction is controlled by a T-shaped protrusion formed by punching out a material in place of an L-shaped pawl formed by bending. CONSTITUTION:An inverted T-shaped protrusion 4a provided with a pawl which controls a printed board 5 in both a vertical and a lateral direction and extends upward is provided to a U-shaped chassis 4. The movement 6 of the printed board 5 fitted into the U-shaped chassis 4 is controlled in three directions by fitting an upright pawl 4c into a rectangular hole 5a and forming a protrusion 4d level with the upper face 4b of the inverted T-shaped protrusion 4a on the base of the U-shaped chassis 4. By this setup, a printed board can be mounted on a chassis without using a bent piece accurately controlling the printed board in both a longitudinal direction and a lateral direction.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a printer I/board mounting device for mounting a printed circuit board onto a chassis used for electrical equipment or the like.

Conventional technology Conventionally, in chassis such as boxes for mounting printed circuit boards, the positioning of the printed circuit board was done by cutting and bending the claws from the chassis into an L shape, and then attaching the claws provided at the rising part of the L shape to the printed circuit board. This was done by inserting it into a long hole.

The above structure will be explained below with reference to the drawings.

Figures 3 and 4 show the chassis structure used for conventional printed circuit board mounting, where 1 is the chassis, 2 is
indicates a printed circuit board. Here, the chassis is assumed to be υ-shaped for ease of explanation.

In conventional examples configured in this way, the printed circuit board 2 that fits into the chassis 1 is usually sized to match the inside of the chassis 1, and this is not a problem when the chassis 1 is a box, but as in this example, In the case of the U type, there was a problem in that the printed circuit board 2 moved because there was no positioning toward the opening side 1a.

In such a conventional structure, normal positioning is performed by providing an L-shaped protrusion 1b inside the chassis 1, and positioning the IC on the L-shaped protrusion 1b on the printed circuit board 2, as shown in the enlarged view of FIG. This was done by inserting it into a long hole 2C shaped to match the part IC. Further, the protrusion 1b performs the function of regulating vertical movement 3 at the bottom 1d of the L-shaped protrusion 1b.
In the case of a U-shape like the wooden example, a trapezoidal projection [e] was provided on the bottom of the U-shape on the same plane as the L-shape bottom 1d to support it in three directions.

Problems to be Solved by the Invention Here, since the L-shaped protrusion 1b was bent, the dimensions of the rising portion 1c were difficult to determine, causing inconvenience in regulating the position of the printed circuit board.

The present invention was developed in view of these problems, and is an apparatus that improves the precision of the printed circuit board, regulates the front and back, left and right directions, and also realizes mounting of the printed circuit board on the chassis without bending. is intended to provide.

Means for Solving the Problem In order to solve this problem, the present invention provides an inverted T-shaped protrusion on the chassis with an upwardly extending claw, and a long hole provided in the Bling I/board at the claw part of the protrusion. This is a printed circuit board mounting device that attaches a printed circuit board to a chassis by fitting the two.

Function: With this configuration, it is possible to regulate the front-back and left-right directions of the printed circuit board without using an L-shaped protrusion that uses bending.

EXAMPLES Hereinafter, examples of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an embodiment of the present invention, where 4 is a U-shaped chassis and 5 is a printed circuit board that is fitted and attached to the U-shaped chassis.

Here, FIG. 148 shows a structure corresponding to the mold protrusion in the conventional example 1, which regulates the vertical and horizontal directions of the printed circuit board 5.
If it is squeezed into an inverted T-shape as shown in FIG.

As a result, the vertical movement 6 of the printed circuit board 5 fitted to the U-shaped chassis 4 can be prevented by fitting the square hole 5a which fits into the vertical two claws 4c provided on the printed circuit board 5, as in the conventional example. A protrusion 4d formed on the same surface as the inverted T-shaped upper surface 4b is provided on the bottom of the U-shaped yam.
It is regulated by doing it in the direction. In the zero example, there are two inverted T-shaped protrusions 4a and one protrusion 4d, but since the shape of the chassis changes depending on the area and shape of the printed circuit board, the number can be increased or decreased as appropriate.

Effects of the Invention As explained above, according to the present invention, the vertical movement of the printed circuit board is controlled not by L-shaped claws using bending, but by using T-shaped apertures formed by drawing out material. In addition to the front and back directions, this has the effect of preventing a decrease in dimensional accuracy due to bending, and reducing the number of press mold surfaces by eliminating bending.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of an embodiment of the present invention, Fig. 2 is an enlarged perspective view of a T-shaped protrusion, Fig. 3 is an exploded perspective view of a conventional example, and Fig. 4 is an enlarged perspective view of an L-shaped protrusion. It is. 4...U-shaped chassis, 4a...Inverted T-shaped protrusion, 4b...Top surface, 4c...Rising portion, 4d... Protrusion, 5... Printed circuit board, 5a... Square hole, 6... Vertical movement.

Claims (1)

[Claims] This printed circuit board mounting device includes an inverted T-shaped protrusion having an upwardly extending claw on the chassis, and a long hole provided in the printed circuit board is fitted into the claw part of the protrusion to attach the printed circuit board to the chassis.