KR100819723B1 - Fixing means for drilling thin printed circuit board - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a printed circuit board, and more particularly, to a means for firmly fixing a substrate to a drill table in a drilling process for fabricating holes in a very thin thin printed circuit board. In the form of a frame firmly fixed to the table, the board inserted between the entry board and the backup board is firmly fixed in the horizontal direction and the vertical direction, and fixed to the drill table through an adsorption mechanism.

Printed circuit boards, drills, tables, holes.

Description

FIXING MEANS FOR DRILLING THIN PRINTED CIRCUIT BOARD}

1A and 1B show a substrate holding apparatus according to the present invention.

<Explanation of symbols for the main parts of the drawings>

10: printed circuit board

11: entry board

12: back-up board

20a: horizontal hinge portion

20b: vertical fixture

20c: base part

20d: adsorption mechanism

100: drill table

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a printed circuit board, and more particularly, to a means for firmly fixing a printed circuit board to a drill table in a drilling process for drilling holes in a very thin thin printed circuit board. .

As electronic products become smaller and lighter, printed circuit boards are becoming thinner and denser. In particular, in the case of a thin printed circuit board having a thickness of about 0.35 mm, in order to form a hole in the circuit board, the substrate is fixed to a numerical drill table (NC drill table) and drilled. The debris is adsorbed and removed through a dust collector to remove substrate debris or other substances from the substrate.

However, as the thickness of the substrate becomes thinner, when the dust collecting residue vacuum suction for dust removal is suctioned, a phenomenon that the substrate does not endure suction force occurs. In other words, when the drill is rotated and the hole generated in the substrate is collected, the substrate is not firmly fixed when the dust is picked up and moves. As a result, an error occurs at the hole position to drill and a burr is formed around the hole. There is a problem that occurs.

As described above, in order to prevent the thin printed circuit board from being lifted up by the dust collector, the art works by attaching the table to the table with adhesive tape to prevent movement. However, after removing the tape attached to the edge of the substrate to fix the substrate to the table after the drilling process, the sticky tape adhesive material remains on the substrate surface, which contaminates the substrate and the adhesive material is present, which may cause work defects in subsequent processes. Can be.

Accordingly, a first object of the present invention is to provide a fixing device capable of firmly fixing a thin printed circuit board to a drill table without using an adhesive tape unlike the prior art.

A second object of the present invention is to provide a fixing device that, in addition to the first object, even when the thickness of the printed circuit board is a thin plate, accurately punctures the hole position of the substrate and suppresses the occurrence of burr around the hole. .

In order to achieve the above object, the present invention is a fixing device for fixing the printed circuit board firmly so as not to move during the drilling of the printed circuit board on the table of the drill machine for drilling holes in the rectangular printed circuit board, The fixing device, when mounted on the printed circuit board, exposes a central portion of the surface of the printed circuit board on which the circuit is formed, and presses the surface edge from the top down only by a predetermined width along the perimeter of the horizontal and vertical edges of the printed circuit board. A horizontal hinge portion having a rectangular frame configuration, which is formed to be covered by a central portion, is formed so as to be covered, and is connected to the horizontal hinge portion in all directions and is formed at right angles in a "b" shape to extend in the vertical direction to change the sides of the horizontal hinge portion. As a form of continuous connection, the sides of the printed circuit board closely adhered to the left and right W vertical fixing part for applying a force to the side of the substrate so as to restrict the horizontal movement of the printed circuit board, which can move during the drilling and; It is connected to the vertical fixing portion to form a right angle to the vertical fixing portion "b" shape, parallel to the horizontal hinge portion, having a base portion fixed to the drill table, the base portion is adsorbed on the lower surface It is provided with a mechanism to provide a fixing device characterized in that the suction fixed to the drill table.

Hereinafter, a drill fixing apparatus for a thin printed circuit board according to the present invention will be described in detail with reference to FIGS. 1A and 1B.

형의 꺾쇠 형태를 이룬다. 여기서, 수평 힌지부(20a)의 길이는 인쇄 회로 기판의 가로 세로 가장자리 둘레 전체를 가압하여 움직이지 않을 정도로 조절할 수 있으며, 수직 고정부(20b)의 높이는 통상적으로 기판의 두께 외에 엔트리 보드(11)와 백업 보드(12)의 두께를 감안해서 설계할 수 있다. 엔트리 보드(11)는 금속제로 제작되며 드릴 작업시에 기판(10) 위에 올려놓고 진행하며, 백업 보드(12)는 베이클라이트 또는 페놀 수지로 제작된다. The fixing device according to the present invention is characterized in that it consists of a metal- or rubber-type cramped frame 20 for fixing the substrate 10, for example, along the lateral and longitudinal edges of the 510 mm by 407 mm substrate. do. The fixing device according to the present invention is connected to the horizontal hinge portion 20a which can be pressed from the top down along the periphery of the substrate and the vertical fixing portion which is connected in a "b" shape perpendicular to the horizontal hinge portion 20a and extends downward. 20b and a base portion 20c extending in the horizontal direction by being connected at right angles to the vertical fixing portion 20b, presumably combining "a" and "b".

It forms a cramp of the sentence. Here, the length of the horizontal hinge portion 20a can be adjusted so as not to move by pressing the entire horizontal and vertical edge around the printed circuit board, the height of the vertical fixing portion 20b is typically the entry board 11 in addition to the thickness of the substrate And the thickness of the backup board 12 can be designed. The entry board 11 is made of metal and placed on the substrate 10 during the drilling operation, and the backup board 12 is made of bakelite or phenol resin.

In addition, as a preferred embodiment of the present invention, the adsorption mechanism 20d may be used to fix the base portion 20c to the drill table 100, and more preferably, the adsorption mechanism is made of rubber to double the adsorption force. Can be used. As a preferred embodiment of the present invention, the adsorption rubber sucker used when attaching the navigation device to the automobile glass may be used as the adsorption mechanism, and the suction force may be doubled between the rubber adsorption mechanism and the table by twisting the handle. .

The foregoing has somewhat broadly improved the features and technical advantages of the present invention to better understand the claims that follow. Additional features and advantages that make up the claims of the present invention will be described below. It should be appreciated by those skilled in the art that the conception and specific embodiments of the invention disclosed may be readily used as a basis for designing or modifying other structures for carrying out similar purposes to the invention.

In addition, the inventive concepts and embodiments disclosed herein may be used by those skilled in the art as a basis for modifying or designing other structures for carrying out the same purposes of the present invention. In addition, such modifications or altered equivalent structures by those skilled in the art may be variously evolved, substituted and changed without departing from the spirit or scope of the invention described in the claims.

As described above, the present invention provides a means in the form of a frame for fixing the substrate to the drill table, thereby easily fixing the substrate without leaving adhesive residue on the substrate. The printed circuit board is punched without causing any problems.

Claims (1)

A fixing device for firmly fixing the printed circuit board so as not to move during the drilling of the printed circuit board on a table of a drill machine for drilling holes in a rectangular printed circuit board. When mounted on the printed circuit board, so as to expose a central portion of the surface of the printed circuit board on which the circuit is formed, and press the surface edge from the top down to cover only a predetermined width along the perimeter of the horizontal and vertical edge of the printed circuit board, A horizontal hinge portion having a rectangular frame shape formed by opening a central portion thereof; It is connected in all directions with the horizontal hinge portion and is formed at right angles in a "b" shape to extend in the vertical direction and extends along the sides of the horizontal hinge portion. A vertical fixing portion for applying a force to a side of the substrate so as to limit horizontal movement of the printed circuit board; Is connected to the vertical fixing portion to form a right angle to the vertical fixing portion "b" shape, parallel to the horizontal hinge portion, provided with a base portion fixed to the drill table, And the base portion is provided with an adsorption mechanism on a lower surface thereof so as to be fixed to the drill table.

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