JP4311179B2 - Parent board with slit for cutting - Google Patents

Description

  The present invention relates to a substrate on which a slit for cutting out a circuit board is formed.

  FIG. 4A schematically shows an example of a substrate with a slit for cutting. The substrate with slits for cutout (hereinafter referred to as a parent substrate) 1 cuts out a plurality of rectangular circuit boards, and a plurality of lateral slits 2 extending in the lateral direction are provided on the parent substrate 1 with a gap therebetween. While being arranged in the vertical direction, a plurality of vertically oriented vertical slits 3 are arranged in the horizontal direction at intervals between adjacent horizontal slits 2. A connecting substrate portion 4 is formed between the lateral slit 2 and the end of the longitudinal slit 3.

  For example, a cutting blade such as a router that rotates with a central axis perpendicular to the parent substrate 1 as a rotation central axis is inserted into the end A of the vertical slit 3 and an arrow is directed from the insertion position toward the horizontal slit 2. For example, the circuit board 6 as shown in FIG. 4C can be cut out from the parent board 1 by advancing the cutting blade in the direction as shown in FIG.

  In addition, although the reference literature regarding the board | substrate with a slit for a cut-out was searched, there was no appropriate literature.

  The following problem has occurred in the parent substrate 1 as shown in FIG. That is, the connecting substrate portion 4 between the lateral slit 2 and the end of the longitudinal slit 3 is formed using a cutting blade such as a router that rotates with the central axis perpendicular to the parent substrate 1 as the rotational central axis. In the step of cutting and removing, as shown in FIG. 4B, after the cutting blade 7 moves from the longitudinal slit 3 and enters the lateral slit 2, for example, the cutting blade 7 cuts. A situation occurs in which the portion D (for example, the portion painted black in FIG. 4B) escapes in the direction indicated by the arrow N as the cutting blade 7 rotates. For this reason, the portion D cannot be removed and remains, so that, for example, as shown in the enlarged view of FIG. 4D and FIG. 4C at the corner of the circuit board 6 cut out from the parent substrate 1. Nabari 8 was generated.

  The flash 8 easily drops from the circuit board 6. For example, if the flash 8 drops and adheres to another circuit board 6, a short circuit problem of the circuit formed on the circuit board 6 may occur, or the circuit board 6 may be damaged. When mounting a part using solder, it causes a soldering failure.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a substrate with a slit for cutting that can prevent flash from being generated at the corner of a circuit board cut out from a parent substrate. .

In order to achieve the above object, the present invention has the following configuration as means for solving the above problems. That is, the present invention is a parent substrate from which a quadrangular circuit board is cut out, and a plurality of lateral slits are formed on the parent substrate in the vertical direction at intervals, and adjacent lateral substrates are arranged. A plurality of longitudinally oriented longitudinal slits are formed between the directional slits with an interval in the lateral direction, and a cutting blade that rotates with the central axis perpendicular to the parent substrate as the rotational central axis is an extension of the longitudinal slit. Insert into the horizontal slit position or vertical slit on the line and move along the vertical slit from the insertion position to cut and remove the substrate portion between the end of the vertical slit and the horizontal slit The circuit board can be cut out from the parent board by the above, and the lateral slit has an overhanging portion that protrudes toward the longitudinal slit at a portion facing the end of the vertical slit. Provided, overhanging portions are formed at the four corners of the circuit board to be cut out from the substrate of the parent, proceeds from the end of the longitudinal slit on the proximal end side of the projecting portion through the flared distal end of the projecting portion The slit side end on the base end side of the overhanging portion on the side where the rotation direction and the traveling direction of the cutting blade are in the forward direction is the direction along the slit side end on the base end side and the locus of the central axis of the cutting blade It is characterized by having an obtuse angle.

  According to the present invention, the lateral slit is provided with the projecting portion that projects toward the longitudinal slit at a portion facing the end of the longitudinal slit, and flash is generated on the base end side of the projecting portion. The slit side end that is likely to be formed has a shape in which the angle formed by the direction along the slit side end and the locus of the central axis of the cutting blade is an obtuse angle. With this configuration, when the cutting blade advances from the end of the longitudinal slit to the proximal side of the overhang through the overhang of the overhang of the overhang, the cutting blade is closer to the advancing direction than the portion being cut. There will be an uncut portion for holding and fixing the cut portion.

  The uncut portion prevents escape displacement due to rotation of the cutting blade at the portion being cut by the cutting blade, so that occurrence of a situation in which the cutting target portion escapes due to rotation of the cutting blade can be avoided. As a result, it is possible to prevent flash from occurring at the corners of the circuit board cut out from the parent board, and to avoid problems caused by the flash.

  In addition, it has a configuration in which the edge shape of the overhanging portion is an arc shape formed by drilling using a drill having a diameter larger than the diameter of the circle of the rotation trajectory of the cutting blade, so that it is easy for the lateral slit. An overhang can be formed on the surface.

  Embodiments according to the present invention will be described below with reference to the drawings. In the description of this embodiment, the same components as those of the parent substrate, which is the substrate with slits for cutting shown in FIG.

  FIG. 1A shows a schematic plan view of a part of the substrate with slits for cutting in this embodiment. In the parent substrate 1 which is a substrate with slits in this embodiment, both end portions of the longitudinal slit 3 are circular with a diameter larger than the slit width w of the longitudinal slit 3. Both end portions of the longitudinal slit 3 are formed by drilling using a drill having a diameter larger than the diameter of the circle of the rotation locus of the cutting blade 7 and larger than the slit width w of the longitudinal slit 3. Yes.

  In the horizontal slit 2, a protruding portion 10 that protrudes toward the vertical slit 3 is formed at a portion facing the end of the vertical slit 3. In this embodiment, the projecting portion 10 has an arc shape. This overhanging portion 10 has a diameter larger than the diameter of the circle of the rotation locus of the cutting blade 7 and larger than the slit width d of the lateral slit 2, similarly to the circular both ends of the longitudinal slit 3. It is formed by drilling using a drill. That is, the protruding portion 10 of the horizontal slit 2 can be manufactured in the same process as the circular end portions of the vertical slit 3. For this reason, complication of the manufacturing process of the parent substrate 1 can be suppressed. In addition, the construction of the overhanging portion 10 of the lateral slit 2 and the circular both ends of the longitudinal slit 3 can be produced by using a drill having the same diameter, thereby making the manufacturing process more complicated. Can be suppressed.

  In this embodiment example, since the edge shape of the overhanging portion 10 is an arc shape, the tip of the overhanging portion 10 is extended from the end of the longitudinal slit 3 as shown in FIG. The slit side end of the base end side of the overhanging portion 10 on the right side of the cutting blade 7 that has advanced to the base end side of the overhanging portion 10 (that is, the side in which the rotation direction and the traveling direction of the cutting blade 7 are the forward direction). Is a shape in which the angle α formed by the direction along the slit side end on the proximal end side as shown by the dotted line S and the locus of the central axis O of the cutting blade 7 as shown by the dotted line T is an obtuse angle. .

  In this embodiment, the edge shape of the overhanging portion 10 is symmetrical with respect to the symmetrical center line passing through the locus of the central axis O of the cutting blade 7. The slit side end on the base end side of the overhanging portion 10 on the left side of the cutting blade 7 that has advanced to the left side (that is, the side in which the rotation direction and the traveling direction of the cutting blade 7 are opposite) is also the base end side of the overhanging portion 10. In the same manner as the right side slit side end, the angle α formed between the direction along the base side slit side end and the locus T of the central axis O of the cutting blade 7 is an obtuse angle.

  In this embodiment, for example, as shown in FIG. 1A, the position A (vertical slit 3) of the protruding portion 10 of the lateral slit 2 (2 a) closest to the edge along the horizontal direction of the parent substrate 1. By inserting the cutting blade 7 at the position of the horizontal slit 2 on the extension line) and moving the cutting blade 7 from the insertion position along the vertical slit 3 as shown by an arrow a. The connecting substrate portion 4 between the end portion 3 and the lateral slit 2 is cut and removed. At this time, for example, in the region where the cutting blade 7 advances from the end of the longitudinal slit 3 toward the lateral slit 2 as in the region surrounded by the dotted line Z shown in FIG. When the cutting blade 7 cuts from the end portion of the longitudinal slit 3 to the proximal end side of the overhang portion 10 through the projecting tip portion of the overhang portion 10 of the lateral slit 2 (see FIG. The uncut portion U (the hatched portion in FIG. 1C) is present on the traveling direction side from the enlarged view of FIG. Even if the cutting portion C tries to escape and displace due to the rotation of the cutting blade 7, the cutting portion C is held (fixed) by the uncut portion U, so that the displacement of the cutting portion C due to the rotation of the cutting blade 7 is prevented. be able to. As a result, the connecting board portion 4 between the lateral slit 2 and the end of the longitudinal slit 3 can be cut and removed as designed, and the burr 8 is applied to the corner of the circuit board 6 cut out from the parent board 1. Can be avoided.

  In addition, this invention is not limited to the form of this embodiment, Various embodiment can be taken. For example, in this embodiment, the overhanging portion 10 provided in the lateral slit 2 has an arc shape, but for example, toward the end of the longitudinal slit 3 as shown in FIG. The overhanging portion 10 to be overhanging may be triangular. Also in this case, as shown in FIG. 2B, the rotational direction and the traveling direction of the cutting blade 7 that has traveled from the end portion of the longitudinal slit 3 to the proximal end side of the projecting portion 10 are forward directions. The slit side end on the base end side of the overhanging portion 10 on the side (right side) has a shape in which the angle α formed by the direction S along the slit side end and the locus T of the central axis O of the cutting blade 7 is an obtuse angle. ing. Thus, as described above, the displacement of the cutting portion C due to the rotation of the cutting blade 7 can be prevented, so that it is possible to prevent the flash 8 from being generated at the corner of the circuit board 6 cut out from the parent substrate 1.

  In this embodiment, the overhang portion 10 is formed so that the trajectory T of the central axis O of the cutting blade 7 and the center of the arcuate overhang portion 10 are on the same straight line (in other words, The protruding portion 10 is formed so as to be bilaterally symmetric with respect to the symmetrical center line passing through the locus T of the central axis O of the cutting blade 7). For example, as shown in FIG. The projecting portion 10 may be formed so that the center P of the arc-shaped projecting portion 10 is located away from the extended line of the locus T of the central axis O of the cutting blade 7.

  Furthermore, in this embodiment example, on the base end side of the overhanging portion 10, not only the side in which the rotation direction and the traveling direction of the cutting blade 7 are the forward direction (right side), but also the rotation direction and the traveling direction of the cutting blade 7. Also on the side (left side) in which the direction is opposite, the angle α formed by the direction along the slit side end and the locus T of the central axis O of the cutting blade 7 is an obtuse angle. On the other hand, on the base end side of the overhanging portion 10 on the side (left side) where the rotation direction and the traveling direction of the cutting blade 7 are opposite directions, the cutting blade 7 entrains the cutting portion. Since the cutting state C is in a state, the escape displacement of the cutting portion C on the side (right side) in which the rotation direction and the traveling direction of the cutting blade 7 are the forward directions does not occur, for example, as shown in FIG. In addition, the slit side end on the base end side of the overhanging portion 10 on the side (left side) where the rotation direction and the traveling direction of the cutting blade 7 are opposite to each other is the direction S ′ along the slit side end and the cutting blade 7. The shape may be parallel to the locus T of the central axis O.

  As described above, the slit side end on the base end side of the projecting portion 10 on the side where the rotation direction and the traveling direction of the cutting blade 7 proceeding from the longitudinal slit 3 to the projecting portion 10 is the forward direction is the base end. As long as the angle formed by the direction along the slit side end and the locus of the central axis O of the cutting blade 7 is an obtuse angle, the shape of the tip portion of the overhang portion 10 and the rotation direction of the cutting blade 7 and the progress The shape of the base end side of the overhanging portion 10 on the side opposite to the direction is not particularly limited.

  Further, in this embodiment, in the step of cutting out the circuit board 6 from the parent substrate 1, the cutting blade 7 is formed at the formation position of the protruding portion 10 in the lateral slit 2 closest to the edge extending along the lateral direction of the parent substrate 1. Is inserted, and the cutting blade 7 is moved from the insertion position along the longitudinal slit 3 to cut and remove the connecting substrate portion 4 between the end of the longitudinal slit 3 and the lateral slit 2. In the example shown in FIG. 6, for example, the cutting blade 7 is inserted into the end of the longitudinal slit 3 and moved from the insertion position toward the lateral slit 2 as indicated by an arrow a in FIG. 7, the connecting substrate portion 4 between the horizontal slit 2 and the vertical slit 3 may be removed by cutting. Thus, the method of removing the connection board | substrate part 4 between the horizontal direction slit 2 and the vertical direction slit 3 with the cutting blade 7 is not limited.

It is a figure for demonstrating the example of one Embodiment of the board | substrate with the slit for cut-out which concerns on this invention. It is a figure for demonstrating other example embodiments. It is a figure for demonstrating the other example of a form of the overhang | projection part provided in a horizontal direction slit. It is a figure for demonstrating an example of a board | substrate with a slit for cutting.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Parent substrate 2 Horizontal direction slit 3 Vertical direction slit 6 Circuit board 7 Cutting blade 10 Overhang part O Center axis of cutting blade T Trajectory of center axis of cutting edge S Direction along the slit side end on the base end side of the overhang part α Overhang Between the direction along the slit side edge of the base end side of the part and the locus of the central axis of the cutting blade

Claims (2)

A parent circuit board from which a rectangular circuit board is cut out, and a plurality of lateral slits are arranged in the parent circuit with a space in the vertical direction, and a plurality of space slits are adjacent to each other. The vertical vertical slits are arranged in the horizontal direction at intervals, and the cutting blade that rotates with the central axis perpendicular to the parent substrate as the rotation central axis is the horizontal slit position on the extension line of the vertical slit. Alternatively, the circuit is removed from the parent substrate by inserting into the longitudinal slit and moving along the longitudinal slit from the insertion position to cut and remove the substrate portion between the end of the longitudinal slit and the lateral slit. and forms a configuration capable of cutting out the substrate, the lateral slit, the portion facing the end of the longitudinal slit, projecting portion which projects toward the longitudinal slit is provided, tension And portion is formed in the four corners of the circuit board to be cut out from the substrate of the parent, the longitudinal direction the slit from the edge of the flared distal end cutting edge which has traveled on the base end side of the projecting portion through the projecting portion The angle between the slit side end on the base end side of the overhanging portion on the side where the rotation direction and the traveling direction are the forward direction is defined by the direction along the slit side end on the base end side and the locus of the central axis of the cutting blade. A substrate with a slit for cutting, characterized in that it has an obtuse shape.   The edge shape of the projecting portion formed in the lateral slit is an arc shape formed by drilling using a drill having a diameter larger than the diameter of the circle of the rotation trajectory of the cutting blade. Item 2. A substrate with slits for cutting according to Item 1.

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