JPH03129893A - Collective board - Google Patents

Abstract

PURPOSE:To simplify a collective board in manufacturing process and to ensure safety in operation by a method wherein a large hole is bored at the terminal of a full-cut slit, full-cut holes and the like are bored inside a split board, and breaking protrusions are prevented from protruding from the outline of the board. CONSTITUTION:A large hole 4 whose diameter is larger than the width of a full-cut slit 3 is bored at the terminal of the full-cut slit 3, full-cut holes 5 and the like are bored inside a split board, and breaking protrusions are prevented from protruding from an outline L of split boards 1A and 1B. When a force is applied onto the wiring boards 1A and 1B linked together with a bridge 2 in the direction of an arrow, a fissure occurs starting from the outer large hole 4 and terminating at the inner hole 4 through the left full-cut hole 5 - the left inner full-cut hole 5, and when a force continues being further applied, the fissure 9 is made to stretch and the printed wiring board 1B is separated from the board 1A. Then, the bridge 2 is bent as pinched to be broken off. By this setup, the surface treatment of the cut areas of split boards can be dispensed with after the boards are separated, and a following mounting operation can be safely and surely carried out.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a printed wiring board (Printed Ci
r・cut Board (abbreviated as PCB) and hybrid integrated circuit board (Hybrid
1rcuit board (abbreviated as HICB), etc., especially in the case of a collective board in which a wide variety of boards are formed using printing technology in a fixed-length single board, and the board is folded along a cut line provided on the board. The broken protrusions caused by the splitting process are placed between the assembled substrates in such a way that they do not protrude into the outline line of the divided substrates.

[Background of the Invention] In recent years, printed wiring boards and hybrid integrated circuit boards have come to be widely used in home appliances, audio equipment, OA equipment, and the like.

The printed wiring board and hybrid integrated circuit board are
In consideration of efficient use and economy of the board, a wide variety of boards are formed on a single fixed-sized board using printing technology, and the desired printed wiring board or It was divided into hybrid integrated circuit boards by folding.

Perforations made in the board as cut lines can be made, for example, by laser scribing (not shown) holes 7 in the hybrid integrated circuit board 6 as shown in FIG. As shown, a full cut slit 3.3 was formed by a bridge 2 in a portion of the printed wiring board 1 that was not electrically connected.

Further, a 7-shaped half-cut groove (not shown) may be carved on the cut line of the printed wiring board 1 and the printed wiring board 1 may be folded.

[Problems to be Solved by the Invention] When the cut line as described above is broken, for example, between the full cut slits 3.3 or the full cut holes 5.5
As shown in FIG. 6, the bridge between the parts becomes a broken protrusion 8 with a jagged surface, which may damage the parts or damage fingers when mounting the parts or using the equipment.

In order to avoid this situation, for example, as shown on the left side of FIG. 5, a method is known in which a small full-cut hole 5 or the like is made to surround the bridged portion 2 and then the material is broken.

However, even with the above method, a tapered fracture protrusion 8 occurs as shown in FIG.

In either case, it was necessary to perform surface treatment to remove the fracture projections 8. In particular, the tapered fracture protrusions 8 are easy to overlook, but since they always occur, surface treatment must be carried out.

This invention has been made in view of the above points, and aims to provide a collective board that does not require troublesome surface treatment after folding at the cut line and allows for safe and reliable mounting work afterward. .

[! ! Means for Solving the Problems] In order to solve the above-mentioned problems, in the present invention, in a collective board in which a single board is divided into a plurality of boards by drilling full-cut slits, full-cut holes, etc., the full-cut At the end of the slit, a large hole with a width larger than that of the full-cut slit is drilled, and at the same time, a full-cut hole, etc. is drilled inside the board to be divided, so that the break protrusion does not protrude into the outline line of the divided board. This is a characteristic feature.

[Function] In the first embodiment shown in FIGS. 1 to 3, the right printed wiring board 1A and the left printed wiring board IB, which are connected by the bridge 2, are forced as shown by the arrows in FIG. When adding , first, as shown in FIG. 2, from the large hole 4 at the back, the full cut hole 5 on the left side, the full cut hole 5 on the left front side, the large hole 4 on the front side, and the crack 9 enter. moreover,
As the force continues to be applied, the crack 9 widens and the left printed wiring board IB is separated as shown in FIG.

Next, pick up the 2 parts of the bridge and break it.

[Embodiment] Next, an embodiment of the collective substrate according to the present invention will be described in detail with reference to the drawings.

In Figure 1, a printed wiring board l as a collective board
is made of an insulating board such as glass epoxy resin, epoxy resin, paper phenol resin, etc., and has a fixed length (for example, 100
0mm x 1000sv).

Desired wiring is printed on the printed wiring board 1 for a wide variety of products, and a cut line CL is provided along the dividing line.

Standard size printed circuit board (thickness 1. (3mm) 1
For example, as part of the cut line CL shown in FIG. A large hole 4.4 with a diameter of 8 am is bored at the opposite end of the full cut slit 3.3, and a full cut hole 5.5 with a diameter of 5 mm is formed on the outside of the bridge 2.
are drilled side by side.

The above-mentioned large hole 4 is drilled so as not to leave a tapered breaking protrusion 8 outside the cut line.

In this way, the large holes 4 and the full cut slits 3 are formed in series with the bridge 2 in between, and the full cut holes 5.5 are arranged side by side and opposite each other, so that the printed wiring board l is placed on the right side. It is divided into a printed wiring board IA on the left side and a printed wiring board IB on the left side.

Then, a cut line CL of the printed wiring board IA on the right side and a cut line CL of the printed wiring board IB on the left side are formed on the printed wiring board l.

More specifically, the cut line CL of the printed wiring board IA on the right side is from the right side of the full cut slit 3 at the back to the right side 11 (approximately 90 degrees) of the large hole 4 at the back to the full cut hole 5 at the back right to the right side at the front right. It is formed to the right l1l (approximately 90 degrees) of the large hole 4 in front of the full cut hole 5.

Also, the cut line CL of the printed wiring board IB on the left side
is the left side of the back full cut slit 3 ~ the left wJ (tJ 90 degrees) of the back large hole 4 ~ the left back full cut hole 5 ~ the left front full cut hole 5 ~ the left side of the front large hole 4 (approximately 90 degrees) degree) to the left side of the front full-cut slit 3.

In the first implementation example shown in FIGS. 1 to 3, a force is applied to the right printed wiring board IA and the left printed wiring board IB, which are connected by the bridge structure 2, as shown by the arrow in FIG. First, as shown in FIG. 2, from the large hole 4 in the back, the full cut hole 5 in the back left, the full cut hole 5 in the front left, the large hole 4 in the front, and the crack 9 enter. moreover,
As the force continues to be applied, the crack 9 widens and the left printed wiring board IB is separated as shown in FIG.

Next, pick up the 2 parts of the bridge and break it.

If the substrate shape is rectangular, then capacitors, IC chips, resistors, chip components, etc. (not shown) are mounted.

If the board shape is complicated, capacitors and ICs may be placed on a single board.
After mounting chips, resistors, chip components, etc., it is folded according to the present invention.

In the above embodiment, the diameter of the large hole 4 was set to 8 mm for the full cut slit 3 with a diameter of 2 mm, but the diameter of the large hole 4 may be larger than the width of the full cut slit 3. However, the condition is that the tapered fracture protrusion 8 caused by the fracture does not protrude beyond the outline line L (shown by the two-dot chain line in FIG. 3) of the divided substrate. Similarly, the full cut hole 5 to be drilled on the outside of the bridge 2 (inside the board to be divided 11111) is also deep if the jagged fracture protrusion 8 due to the fracture does not protrude beyond the outline line L of the divided board. It doesn't matter what shape it is. Moreover, it does not have to be a full cut hole.

[Effects of the Invention] As described above, the collective board according to the present invention is capable of full-cutting in the collective board that is divided into a plurality of boards after desired wiring of various types is printed on two large boards. A large hole is formed at the end of the slit, and a full cut hole, etc., which becomes part of the cut line, is formed inside the substrate to be divided.

When such a collective substrate is folded, the breakage protrusion does not protrude from the outer contour line of the substrate.

Therefore, unlike the conventional method, there is no need for troublesome surface treatment work after folding, and the process can be simplified and costs can be reduced. Furthermore, it is possible to prevent accidents such as injuries caused by broken protrusions, damage to parts, and breakage of lead wires, as well as ensuring work safety and improving yields, which has extremely large practical and economical effects.

FIG. 3 is a perspective view showing the cut surface; FIGS. 4 and 5 are perspective views of the conventional example, and FIGS. 6 and 7.
The figure is a perspective view showing a cut surface of a conventional example.

・Cut line ・Outline line ・Printed wiring board ・Hashikake is War Furka Ntosuri Soto ・Large hole ・Full cut hole

[Brief explanation of the drawing]

Claims (1)

[Claims] (1) For collective boards that are divided into multiple boards by drilling full-cut slits, full-cut holes, etc. on a single board, at the end of the full-cut slit, a large hole wider than the full-cut slit is drilled at the end of the full-cut slit. At the same time, the assembled board is characterized in that a full cut hole or the like is formed inside the board to be divided so that the breaking protrusion does not protrude into the outline line of the divided board.