JPS5915090Y2 - flexible printed wiring board - Google Patents

Description

[Detailed description of the invention] This invention is based on the cutting process line of the flexible printed wiring board.
The present invention relates to a flexible printed wiring board in which holes having corners are provided to facilitate cutting of the flexible printed wiring board.

Conventionally, when cutting a rigid printed wiring board into sections, perforations or grooves such as round holes or square holes are created.

However, this method cannot be applied to flexible printed wiring boards that have no stiffness.

In addition, if a flexible printed wiring board has a sharp notch on its outside, it can be easily torn at the notch, but since it is not linear, flexible printed wiring boards are divided using a knife. I needed an easy way to divide it.

In order to easily divide the boundary line of the flexible printed wiring board in a straight line and without using a knife, it is necessary to cut out a notch on the boundary line to make it easier to tear, and to mark the path of the tear that deviates from the boundary line on the boundary line. It is necessary to create a hole that has both effects.

In the present invention, a hole having both of these effects is provided, such as a triangular hole, having a corner so that the corner is located on the cutting line.

In other words, the present invention creates a hole along the cutting line of a flexible printed wiring board, which has one corner and the side opposite to the corner forms a side, so that the corner is located on the cutting line. Moreover, the flexible printed wiring board is characterized in that the corner portion is provided so as to face the side portion of the next hole.

As shown in Figure 1, if the tear starts from the cutout point 2 on the outside, the tear always starts from the top (corner) of the inverted triangular hole, so even if the tear deviates from the boundary line (cutting line), the next It is possible to return to the boundary line again by the edge of the hole.

In other words, if a hole is torn from a sharp notch, even if the tear goes off the boundary line, it will end up inside the inverted triangle, and the next tear will start again at the sharp apex of the inverted triangular hole on the boundary line.

In Fig. 1, 1 is a flexible printed wiring board, 2 is a cutout part of the outer shape, 3 is an inverted triangular hole, 4 is a cutting part, 5 is a corner part,
6 is a side part.

For example, an inverted triangular hole is an equilateral triangular hole with sides of 1 mm and 1 mm.
By providing a large number of sheets with a spacing of m, it is possible to cut a flexible printed wiring board in a straight line by simply tearing it by hand.

FIG. 2 shows another example of the shape of a hole having a corner. As shown in a and b, the corner of the upper side may be rounded to prevent it from tearing laterally.

Further, the angle of the corner portion 5 is preferably an acute angle so as to form a sharp notch, but it does not necessarily have to be an acute angle depending on the purpose.

6 is the side of the hole. FIGS. 3 and 4 show an embodiment of the present invention, and 7 is a printed circuit.

In FIG. 4, the tear begins from the notch and stops at a hole with no sharp corners in the direction of tear propagation, as shown at 8.

Conventional means of dividing rigid printed wiring boards (perforations, etc.)
Because it cannot be applied to flexible printed circuits that have no stiffness, a knife was used as a dividing means, but with this invention, it is now possible to easily divide and slit a series of flexible printed wiring boards by hand without using a knife. Now I can do it.

[Brief explanation of drawings]

FIG. 1 is a plan view of the printed wiring board of the present invention, FIG. 2 is a plan view showing other examples of hole shapes, and FIGS. 3 and 4 are plan views of printed wiring showing other examples. be. Explanation of symbols 1...Flexible printed wiring board,
2...Outline notch, 3...Inverted triangular hole, 4...Cutting location, 5...Corner, 6...・Side part, 7...Printed circuit, 8
・・・・・・A hole without a corner.

Claims (1)

[Scope of utility model registration request] Along the cutting line of the flexible printed wiring board, there is one corner 5, and the side facing the corner 5 is a side 6.
A flexible printed wiring characterized in that a hole 3 having a shape constituting a hole 3 is provided such that a corner 5 is located on the cutting line, and further, the corner 5 is opposed to a side 6 of the next hole. Board.