CN201394662Y

CN201394662Y - Circuit board drilling structure

Info

Publication number: CN201394662Y
Application number: CN200920150507XU
Authority: CN
Inventors: 张蓝燕
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-04-23
Filing date: 2009-04-23
Publication date: 2010-02-03
Anticipated expiration: 2019-04-23

Abstract

The utility model relates to a circuit board drilling structure. When drilling target holes in a circuit board making process, the drilling operation is performed from up down; especially, a pad is disposed under the circuit board. Therefore, the drill bit can passes through the circuit board completely, and properly feed into the pad, thus, the known defects of burr or copper cap generated on thecircuit board after drilling can be modified.

Description

The circuit boring structure

Technical field

The utility model relates to hole structure, particularly a kind of hole structure of circuit board.

Background technology

Known circuit board is in the process of producing, because of following process needs to be drilled with hole.

The boring of available circuit plate as shown in Figure 1, generally adopts drill bit 11 to hole; Mostly prior art is drill bit 11 is installed on circuit board 12 (PCB) below at present, moves drill bit 11 during boring, adopts bore mode from bottom to top; This kind bore mode from lower to upper, because being positioned at the end face of drill bit 11 upper circuit board 12 is not subjected to compacting, is open shape, cause circuit board 12 to have a little little curved arch bar phenomenon that makes progress during boring easily, during especially at 12 borings of thin type circuit board, the arch bar situation is even more serious; When drill bit 11 firm brills broke circuit board 12, arch bar was with quick resilience, and consequently wad cutter 121 edges that get out form burr or cause copper cap 122, waste material generation, and the good rate of processing procedure for entire circuit plate 12 like this can have a significant impact.This disappearance is present in circuit board and makes industry for a long time, fails to break through and improvement always.

In view of this creator special creates into this case to grind, and hope can improve existing shortcoming by the proposition of this case, and when circuit board was produced, the generation that can solve these burr and copper cap was perplexed.

Summary of the invention

The purpose of this utility model is, solves in the boring procedure of available circuit plate, easily produces the arch bar phenomenon, produces the problem of burr and copper cap.

For reaching above-mentioned purpose, the utility model provides a kind of circuit boring structure, comprising:

One drill bit is positioned at circuit board top to be holed;

One liner is positioned at circuit board bottom to be holed, and this liner is sustainable shifts one's position.

Particular content is: adopt mode from top to bottom to hole, particularly below circuit board, be provided with a liner; Drill bit can bore through circuit board fully during boring, even suitably pierces liner, support because the circuit board below is provided with liner, so circuit board does not have the situation generation of arch bar; Moreover when boring more circuit board fully because of drill bit, drill bit can be pulverized the board structure of circuit of its process fully, does not have the burr phenomenon, does not more have the copper cap and produces, and produces good rate for raising, has high industrial utilization and contribution.

The beneficial effects of the utility model are that this kind hole structure not only can solve the problem of arch bar, and the generation of can forgo burr and copper cap disappearance.

Description of drawings

Fig. 1 is the schematic diagram of known circuit boring;

Fig. 2 is the schematic diagram of the utility model circuit boring;

Fig. 3 is another schematic diagram of the utility model circuit boring;

The schematic diagram that Fig. 4 moves for liner behind the circuit boring of the present utility model.

Description of reference numerals:

The 1-drill bit; The 12-circuit board; The 121-wad cutter; 122-copper cap; The 2-drill bit; The 3-circuit board; The 31-hole; The 4-liner; The 41-shrinkage pool.

The specific embodiment

Now with regard to the detailed content and the technology of the utility model circuit boring structure, and the effect that can produce, cooperate graphicly, the preferred embodiment of lifting a this case is described in detail as follows.

See also shown in Figure 2, this case circuit boring structure, this hole structure comprises:

Adopt mode from top to bottom to hole, make drill bit 2 be positioned at circuit board 3 tops;

Be provided with a liner 4 in circuit board 3 bottoms;

Make drill bit 2 runnings, make drill bit 2 bore the circuit board 3 of ad-hoc location more fully, and suitably pierce liner 4;

On move drill bit 2, in circuit board 3, produce hole 31, and in liner 4, form shrinkage pool 41.

By aforementioned hole structure as can be known, because of drill bit 2 bores circuit board 3 structures and then formation hole 31 more fully, have following advantage:

One, because circuit board 3 belows are provided with liner 4, has supporting role, do not produce so circuit board 3 does not have the situation of arch bar.

When two, getting over circuit board 3 because of drill bit 2 brills, circuit board 3 is smooth fully, does not have the arch bar phenomenon, and drill bit 2 is pulverized circuit board 3 structures of its process fully, does not have the burr phenomenon, does not more have known copper cap and produces.

For making liner 4 can continue to play effectiveness, this liner 4 after whenever once holing, promptly can carry out shift in position.As shown in Figure 3, after drill bit 2 moves down and holes, rising drill bit 2, the liner 4 of circuit board 3 drill hole below presents recess because of drilled mistake in order to avoid next time, the effect of drill hole back support can't be provided, need mobile liner 4 earlier, promptly as Fig. 4, to guarantee that the liner 4 of circuit board 3 drill hole below all is an entity each time, can possess supporting role.

Aforementioned liner does not limit material, is a jettisonable entity structure.

The above specific embodiment only is preferred embodiment of the present utility model, and it is illustrative for the utility model, and nonrestrictive.Those skilled in the art carries out conversion, modification even equivalence to it under the situation that does not exceed the utility model spirit and scope, these changes all can fall into claim protection domain of the present invention.

Claims

1, a kind of circuit boring structure is characterized in that, comprising:

One drill bit is positioned at circuit board top to be holed;

One liner is positioned at circuit board bottom to be holed, and this liner continues to shift one's position.

2, circuit boring structure according to claim 1 is characterized in that this liner is an entity structure.