JPH04196382A - Printed board provided with reinforcing plate - Google Patents

Abstract

PURPOSE:To protect a printed board against cracks and fissures and to prevent the leads of an electronic component inserted into the printed board from being deformed or coming into contact with each other by a method wherein legs provided to the side edge of a reinforcing plate are inserted into holes bored in the sides of the board, tentatively fixed, and soldered after they are made to protrude from other openings of the holes. CONSTITUTION:Holes 2 are previously bored in a printed board 1, then the legs 4 of a reinforcing plate 3 are inserted into the holes 2, the legs 4 serving as protectors of the leads of an electronic component are twisted to tentatively fix the reinforcing plate 3 to the board 1. An electronic component 5 is inserted and soldered to the board 1, and the legs 4 are soldered 6 to the printed board 1. By this setup, a printed board can be fixed keeping horizontal with a reinforcing plate and by twisting the legs (protectors of the leads of electronic component) of the reinforcing plate, so that a printed board can be protected against warpage caused by thermal deformation induced in a soldering process and cracks induced in an after process where correcting works are carried out by a rigid reinforcing plate.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a printed circuit board with a reinforcing plate added thereto to prevent the printed circuit board used for constructing electronic equipment from warping or cracking during transportation. It is something.

[Conventional technology]

Conventional printed circuit board reinforcing plates are made of plastic, and in consideration of thermal deformation and post-work productivity, they are used just before the printed circuit board assembly is completed after electronic components are inserted and soldered. During the process, it was common to use screws or the like to reinforce printed circuit boards. However, no consideration was given to preventing warpage and cracking of the printed circuit board during the process from the electronic component insertion process to the process of attaching the reinforcing plate, as well as prevention of bending of the inserted electronic component lead.

[Problem to be solved by the invention]

The above conventional technology does not take into account the strength and warpage of the printed circuit board and the protection of the electronic component leads inserted into the printed circuit board, resulting in problems such as cranking and cracking of the printed circuit board and bending and contact of electronic component leads. there were. There was also the problem that no consideration was given to workability, and that installing the reinforcing plate required a large number of man-hours.

An object of the present invention is to provide a printed circuit board with a reinforcing plate that can prevent cracks and breaks in the printed circuit board as well as bending and contact of electronic component leads inserted into the circuit board, and has excellent workability. .

[Means to solve the problem]

In order to achieve the above object, in the present invention, holes are opened at appropriate intervals along the sides of a rectangular printed circuit board, and elongated reinforcing plates are arranged along the sides of the board, and
Legs formed at appropriate intervals on the side edges of the reinforcing plate are inserted into the holes drilled along the sides of the substrate to protrude, and the protrusions are inserted into the holes. After temporarily fixing it so that it would not come off, I soldered the temporarily fixed part.

Furthermore, in order to prevent the electronic component leads inserted into the printed circuit board from bending or contacting each other, the protrusion length of the soldered temporary fixing portion from the board surface is made slightly longer than the protrusion length of the electronic component lead.

[Effect]

The reinforcing plate of the printed circuit board is used to prevent warping and cracking of the printed circuit board.
It operates to prevent the electronic component lead from bending. This increases the strength of the printed circuit board due to the rigidity of the reinforcing plate, eliminating warping and cracking. In addition, the soldered temporary fixing part of the reinforcing plate is more rigid than the electronic component lead.
Since the electronic component lead is somewhat long, no external force is directly applied to the electronic component lead, so the electronic component lead is not bent.

In other words, by soldering the reinforcing plate to the temporarily soldered legs of the reinforcing plate, the printed circuit board and the reinforcing plate are integrated, and the warping of the printed circuit board due to the heat generated when passing through the solder bath can be suppressed. In addition, since the ends of the printed circuit board are held by reinforcing plates, the printed circuit board is not deformed due to vibrations during transportation, and cracking of the printed circuit board can be prevented.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line AA' in FIG.

Please refer to FIGS. 1 and 2. Hole 2 is pre-drilled in printed circuit board 1.
After that, the legs 4 of the reinforcing plate 3 are inserted, and the legs 4, which also serve as electronic component REIT protection parts, are twisted to temporarily fix the printed circuit board 1 to the reinforcing plate 3.

Then, the electronic components 5 are inserted and soldered, and the reinforcing plate 3
The legs 4 and the printed circuit board 1 are fixed with solder 6.

According to this embodiment, warpage and cracking of the printed circuit board 1 can be prevented, and by making the leg portions 4 longer than the electronic component leads 7, bending of the leads 7 and damage to the electronic components 5 can be prevented. effective.

3 is a plan view showing another embodiment of the present invention, FIG. 4 is a right side view thereof, FIG. 5 is an enlarged view of section A in FIG. 4, and FIG. 6 is an enlarged view of section A shown in FIG. Exploded view of the part, Figure 7 is B-B of Figure 5.
It is a sectional view.

See these figures. Reinforcing plates 12 are provided at both ends of the printed circuit board 11 at right angles to the fiber direction of the printed circuit board 11,
Holding part 12b and inclined part 12 that hold printed circuit board 11
Insert the leg part 12d whose distance t from the printed circuit board 11 is smaller than the thickness T of the printed circuit board 11 (T - 0,2 mm) into the fitting hole 11a of the printed circuit board, and move it in the direction of the arrow as shown in FIG. After sliding the reinforcing plate 12 and temporarily fixing it, the leg part 12d is soldered 13 through a solder tank and fixed.

According to this embodiment, it is possible to prevent the printed circuit board from warping when it passes through the solder bath, and it is also effective in preventing the printed circuit board from cracking during transportation of the television set.

〔Effect of the invention〕

According to the present invention, the printed circuit board includes a reinforcing plate and its legs (
By twisting the electronic component lead protector), it can be fixed horizontally, so the rigidity of the reinforcing plate can prevent warping due to thermal deformation during soldering and cracking during post-work such as correction.

Further, since the leg portions (electronic component leat protection portions) are slightly longer than the electronic component leat, there is also an effect of preventing the electronic component leat from bending.

Furthermore, since the reinforcing plate is provided perpendicularly to the fiber direction of the printed circuit board, it is possible to prevent the printed circuit board from warping when passing through a solder bath and from cracking during transportation, resulting in good workability and low cost.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing one embodiment of the present invention, and FIG. 2 is a perspective view showing one embodiment of the present invention.
3 is a plan view showing another embodiment of the present invention, FIG. 4 is a right side view thereof, and FIG. 5 is an enlarged view of section A in FIG. Figure 6 is an exploded view of part A shown in Figure 5.
FIG. 7 is a sectional view taken along line BB in FIG. 5. 1...Printed circuit board, 2...hole. 3... Reinforcement plate. 4. Legs (electronic component lead protection part). 5...Electronic parts, 6...Solder. 7...Electronic component REIT, 11...Printed circuit board. 11a... Fitting hole, 12... Reinforcement fitting. 12a... Aperture part, 12b... Holding part. 12c... Slope portion, 12d... Leg portion. 13...Solder.

Claims (1)

[Claims] 1. Holes are drilled at appropriate intervals along the sides of a rectangular printed circuit board, and a long reinforcing plate is placed along the side of the board, and at appropriate intervals on the side edges of the reinforcing plate. The leg portions formed by placing the base plate are inserted into the holes drilled along the sides of the substrate so that they protrude, and the protruding portions are temporarily fixed so that they do not come out of the inserted holes. A printed circuit board with a reinforcing plate, characterized in that the fixing part is soldered.