JPH08222824A - Fitting structure of printed board - Google Patents

Abstract

PURPOSE: To obtain a fitting structure of a printed board which makes it possible to fix two printed boards to be fitted in directions intersecting each other perpendicularly without using a component such as a metal fitting, a special jig or something else. CONSTITUTION: In a fitting structure of a printed board having a construction wherein a plurality of tongue pieces 3 for insertion provided in the end edge part of one printed board 1 are inserted into insertion holes 6 formed in the other printed board 2 on the occasion when the second printed board 2 is fitted in the direction intersecting the first printed board 1 perpendicularly, an engagement hole 5 is formed in one tongue piece 3 at least and a circular-arc projecting part 8 engaging with the engagement hole is formed at the inner peripheral edge of the opening of the insertion hole 6, while a circular-arc recessed part 9 is formed in the inner peripheral edge on the opposite side to the projecting part so that it corresponds to the projecting part. By inserting the tongue pieces 3 into the insertion holes 6 forcibly, the tongue pieces are bent and the projecting part engages with the engagement hole.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed circuit board mounting structure, and more particularly to a mounting structure for mounting two printed circuit boards so as to be orthogonal to each other.

[0002]

2. Description of the Related Art Conventionally, when a second printed circuit board is vertically attached to a first printed circuit board arranged in a horizontal direction, a plurality of printed circuit boards are provided at an edge of one of the printed circuit boards. There is a printed circuit board mounting structure configured to insert the insertion tongue piece into the insertion hole formed in the other printed circuit board.

FIG. 2 is a rear perspective view showing an essential part of a printed circuit board mounting structure in a portable radio communication device. In FIG. 2, 11 is a first printed circuit board mounted horizontally in a front case 13. Reference numeral 12 denotes a second printed circuit board vertically attached to the first printed circuit board 11 for arranging a circuit such as a switch operated by the knob 14, and an edge of the second printed circuit board 12. The tongue piece 15 for insertion formed in the portion is inserted into the mounting portion 17 formed between the cutout portion 16 of the first printed circuit board 11 and the side wall 18 of the front case 13 for positioning, and each printed circuit board is positioned. 11 and 12 are fixed and attached by fixing parts.

[0004]

However, the conventional means shown in FIG. 2 is a temporary fixing for the purpose of positioning the first printed circuit board and the second printed circuit board at the time of assembly and is easily detached. I was afraid.

An object of the present invention is to eliminate the above-mentioned drawbacks of the conventional printed circuit board mounting structure and to use two printed circuit boards to be mounted in the orthogonal direction by using parts such as mounting brackets or a special jig. Another object of the present invention is to provide a mounting structure for a printed circuit board that can be fixed without doing so.

[0006]

According to the printed circuit board mounting structure of the present invention, when mounting a second printed circuit board in a direction orthogonal to a first printed circuit board, the printed circuit board mounting structure is mounted on an edge of one of the printed circuit boards. In a printed circuit board mounting structure configured to insert a plurality of provided insertion tongues into insertion holes formed in the other printed circuit board, at least one tongue has an engagement hole formed therein, An arcuate convex portion that engages with the engaging hole is formed on the inner peripheral edge of the opening of the insertion hole, and an arcuate concave portion is formed on the inner peripheral edge on the opposite side of the convex portion so as to correspond to the convex portion. And the tongue piece is forcibly inserted into the insertion hole so that the tongue piece bends and the convex portion engages with the engagement hole.

[0007]

When mounting the other printed circuit board on one printed circuit board, the tongue provided on the one printed circuit board and the insertion hole of the other printed circuit board are aligned and pushed. At this time, since there is a convex portion on the inner peripheral edge of the opening of the insertion hole, it cannot be inserted in the loosely fitted state, so that forced insertion is performed. The tongue piece bends slightly as the convex portion tries to pass the tongue surface, and the convex portion is fitted and fixed in the fitting hole provided in the tongue piece in the passed state. The fitting force between the convex portion and the fitting hole is adjusted by an arcuate concave portion formed on the inner peripheral edge on the opposite side of the convex portion.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an exploded perspective view of a main part of a printed wiring board mounting structure of a portable radio communication device, viewed from the front side. In the figure, reference numeral 1 is a first printed circuit board horizontally attached to the frame 10, and 2 is a second printed circuit board vertically attached to the first printed circuit board 1, which is operated by a knob 14. It is for arranging a circuit such as a switch, and is formed of a reinforced fiber laminated plate or the like. Reference numerals 1a and 10a denote screw holes provided in the first printed circuit board and the frame 10, respectively, and 20 denotes a liquid crystal display panel arranged on the first printed circuit board 1.

Two tongue pieces 3 and 4 for insertion are provided on the edge portion of the first printed board 1, and an engaging hole 5 is formed in one tongue piece 3. An insertion hole 6 and a tongue piece 4 into which the above-mentioned tongue piece 3 is fitted are provided on the edge portion of the second printed circuit board 2.
Notch grooves 7 are formed so as to fit together.

The insertion hole 5 has a substantially rectangular shape having a width corresponding to the wall thickness of the tongue piece 3. The upper portion of the inner peripheral edge of the opening of the insertion hole 5 has an arc shape which engages with the engagement hole 5. The convex portion 8 is projected, and an arc-shaped concave portion 9 corresponding to the convex portion 8 is formed at the inner peripheral edge on the opposite side of the convex portion 8, that is, at the lower portion of the inner peripheral edge.

When the first printed circuit board 1 and the second printed circuit board 2 are attached, the tongue piece 4 provided on the first printed circuit board 1 is inserted into the notch groove 7 provided on the second printed circuit board 2. In the engaged state, the tongue piece 3 and the insertion hole 6 are aligned and pushed. At this time, since there is a convex portion 8 on the inner peripheral edge of the opening of the insertion hole 6, it cannot be inserted in the loosely fitted state, so that forced insertion is performed. The tongue piece 3 bends slightly as the convex portion 8 tries to pass the surface of the tongue piece 3, and the convex portion 8 is fitted and fixed in the fitting hole 5 provided in the tongue piece 3 in the state of passing. The fitting force between the convex portion 8 and the fitting hole 5 can be adjusted by the height of the convex portion 8 or the concave portion 9 formed at the inner peripheral edge on the opposite side.

In the embodiment, the printed circuit board mounting structure of the portable radio communication device is shown, but it is of course applicable to the printed circuit board mounting structure of other electronic equipment. The tongue piece 3 and the insertion hole 6 may be provided on either side of the first and second printed circuit boards 1 and 2.

[0013]

According to the printed circuit board mounting structure of the present invention, a mounting bracket or a special jig is used by tightly fitting the tongue piece of one printed circuit board and the insertion hole of the other printed circuit board. It can be fixed easily and securely without performing. Further, since adhesion, soldering, or special mounting metal fittings are not required, they can be easily removed and reattached.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of essential parts showing an example in which a printed circuit board mounting structure of the present invention is mounted to a printed circuit board of a wireless communication device.

FIG. 2 is a perspective view showing a printed circuit board mounting structure in a conventional wireless communication device.

[Description of sign]

 1 First Printed Circuit Board 2 Second Printed Circuit Board 3 Tongue 4 Tongue 5 Fitting Hole 6 Insertion Hole 7 Notch Groove 8 Convex 9 Recess 10 Frame

Claims (2)

[Claims] 1. When mounting a second printed circuit board in a direction orthogonal to the first printed circuit board, a plurality of insertion tongue pieces provided at an edge of one of the printed circuit boards are attached to the other printed circuit board. In a printed circuit board mounting structure configured to be inserted into an insertion hole formed in a printed circuit board, an engagement hole is formed in at least one tongue piece, and the engagement hole is formed in an inner peripheral edge of an opening of the insertion hole. An arc-shaped convex portion that engages with the projection is formed, and the tongue piece is bent by forcibly inserting the tongue piece into the insertion hole so that the convex portion engages with the engagement hole. A printed circuit board mounting structure characterized by being provided. 2. The printed circuit board according to claim 2, wherein an arcuate concave portion is formed on the inner peripheral edge of the opening of the insertion hole opposite to the convex portion so as to correspond to the convex portion. Mounting structure.