CN2435901Y

CN2435901Y - Punching structure for circuit board

Info

Publication number: CN2435901Y
Application number: CN 00238227
Authority: CN
Inventors: 陆善濬
Original assignee: Liyang Electronic Co ltd
Current assignee: Liyu Electronics Co., Ltd.
Priority date: 2000-07-04
Filing date: 2000-07-04
Publication date: 2001-06-20
Anticipated expiration: 2010-07-04

Abstract

The utility model discloses a punching structure for a circuit board. The soldering tin of screw punching periphery is at least provided with a guide groove in concave way or is at least convexly provided with a guide part structure; when the printed circuit board is coated with tin, the superfluous tin can be guided to the outside of the punching operation, or can be accumulated in the guide groove or at both sides of the guide part; then, the utility model can avoid the screw punching position being blocked by the tin; the utility model can reach the purpose of reducing the operational time and the production cost without increasing one process of getting though the punching position.

Description

The circuit board perforation structure

The utility model relates to a kind of circuit board perforation structure, and is meant the structure of soldering (pad) around a kind of change perforation especially, thereby when preventing that circuit board from crossing tin, unnecessary tin stops up this perforation.

Raising the efficiency and reducing cost is the only effective means that enterprise seeks survival under the powerful market competitive pressure, especially industrial circle is experienced strong especially.Wherein for electronic industry, printed circuit board (PCB) (PCB) and various electronic component are assembled, utilize several screws that printed circuit board (PCB) is fixed on the device afterwards again, it is the basic step in the production process, nearly all electronic products all needs through this processing procedure, and hence one can see that, follows the various course of processing and the quality of the pass of printed circuit board (PCB), can the influence of certain degree ground make the cost and the efficient of product, so have to be paid attention to.

Usually can offer many big and small perforation on printed circuit board (PCB), some is to allow various electronic component, as capacity cell, resistive element or IC (integrated circuit) element etc., inserts assembling and uses, and some then provides, and to allow screw pass sealed.No matter be above-mentioned which kind of perforation, all can around perforation, plate a scolding tin, even to weld the perforation of join dependency element, with the media that electrically connects as each interelement.

Please refer to Fig. 1, it is the organigram of the screw perforation 10 of being offered on the conventional printed circuit board (PCB), as shown in the figure, around perforation 10, can evenly plate the scolding tin 20 of one deck ring-type, make and to pass this perforation 10 and when being locked on printed circuit board (PCB) when screw, can reach the purpose of ground connection as conductor by scolding tin 20 and screw.Because the assembly program of general electronic products, meeting be plugged in all electronic components the perforation of relevant position on the printed circuit board (PCB) earlier.And then cross tin, so that each electronic component electrically connected and be fixed on the printed circuit board (PCB); But; the part of screw perforation 10 is empty (because also not locking screw) in crossing the tin process; so regular meeting has unnecessary tin to enter among the perforation 10; 10 obstructions for the treatment of just will bore a hole after tin solidifies are lived, therefore, and before using the screw closure printed circuit board (PCB); the perforation 10 that must clog being blocked earlier is open-minded; thus, many again steps increase operating time and production cost in rain in processing procedure.

The purpose of this utility model is to propose a kind of circuit board perforation structure of being made up of the perforation with guiding groove or guide portion, it can make printed circuit board (PCB) when carrying out the program of tin, make unnecessary scolding tin by guided outside toward perforation, or build up in guiding groove or the dual-side of guide portion, thereby avoid the screw perforation to be stopped up, thereby solved the existing in prior technology problem by scolding tin.

The technical scheme that the utility model adopted is: be applied on the printed circuit board (PCB) for around the perforation of screw closure, this perforation is coated with one deck scolding tin on every side, is arranged with at least one guiding groove on this layer scolding tin, thereby avoids this perforation to be blocked clogging.

Describedly be arranged with at least one guiding groove, also can be: be convexly equipped with at least one guide portion.Make and when this printed circuit board (PCB) is crossed tin, can utilize this guide portion to be directed away unnecessary tin, thereby avoided this perforation to be blocked clogging.

Advantage of the present utility model is: when printing board carried out the tin program, can reduce the screw perforation and be stopped up the situation of living by unnecessary tin, therefore finished the tin program and when desiring to lock screw when printed circuit board (PCB), must not increase the step of getting through the screw perforation together again, thereby can reduce operating time and production cost.

The organigram that Fig. 1 tightens up a screw and bores a hole for conventional printed circuit board (PCB);

Fig. 2 is the organigram of the utility model first embodiment;

Fig. 3 is the organigram of the utility model second embodiment;

Fig. 4 is the organigram of the utility model the 3rd embodiment; And

Fig. 5 is the organigram of the utility model the 4th embodiment.

Further specify preferred embodiment of the present utility model in conjunction with above-mentioned each accompanying drawing now.

The utility model wishes just can not increase under the situation of operating time and production cost not making significantly modification on structure or the processing procedure, and in the time of can lowering tin effectively, unnecessary tin stops up the phenomenon of screw perforation.

Please refer to Fig. 2, it is first embodiment of the present utility model, show among the figure, around perforation 10, evenly be coated with one deck scolding tin 20, make and to pass this perforation 10 and when being locked on printed circuit board (PCB) when screw, can contact as conductor with helical by scolding tin 20, and unnecessary electric charge on the printed circuit board (PCB) is fallen in guiding, therefore reach the purpose of ground connection; In addition, the utility model is concaved with one first guiding groove 21 and one second guiding groove 22 on scolding tin 20, and the set-up mode of this two guiding

groove

21,22 is that perforation 10 is radiosymmetric position for the center.Therefore, when carrying out the program of tin when the good all electronic components of printed circuit board (PCB) plug-in mounting, though the perforation 10 corresponding to screw is empty (because also not locking screw this moment), but because two guiding grooves, 21, the 22 discontinuous effects in the plane of being caused, and make unnecessary tin because capillary factor, but be directed into perforation 10 the outside, or stop at the periphery of perforation 10; If when unnecessary tin really surpasses the amount that can depend on perforation 10 peripheries, also can build up earlier among two guiding

grooves

21,22, therefore the perforation 10 in the middle of can directly not falling into earlier reaches perforation 10 and is not blocked the purpose of living by unnecessary tin.

Please refer to Fig. 3, it is second embodiment of the present utility model, and what show among the figure is the mode of offering of another kind of guiding groove 23,24.In the present embodiment, with the setting of two guiding

grooves

23,24 10 is the center to bore a hole still, but split the left and right sides of what perforation 10 abreast, thus, the contact range of two guiding

grooves

23,24 and tin enlarges, and in guiding

groove

23,24, can hold more the more surplus tin, thereby strengthen preventing to bore a hole 10 by tin obstruction effect firmly.

Please refer to Fig. 4, it is the 3rd embodiment of the present utility model, and what show among the figure is so that the mode of

guide portion

25,26 to be set, and reaches the effect of the unnecessary tin of resistance shelves.The utility model is on annular originally scolding tin 25, repeat to plate again the scolding tin of two strips, thereby first guide portion 25 and second guide portion 26 that form to protrude, the set-up mode of this two

guide portion

25,26 10 is that the center is radiosymmetric position to bore a hole also in the what present embodiment.Therefore, when printed circuit board (PCB) carried out the program of tin, unnecessary tin just can be blocked by two

guide portion

25,26, and built up wherein a side or the left and right sides of this

guide portion

25,26 of what, thereby reached to prevent to bore a hole and 10 stopped up the effect of living by tin.

Please refer to Fig. 5, it is the 4th embodiment of the present utility model, and what show among the figure is the set-up mode of another kind of guide portion 27,28.In the present embodiment, be 10 to be the center still to bore a hole with the setting of two

guide portion

27,28, but split the left and right sides of what perforation 10 abreast, thus, the contact range of two

guide portion

27,28 and tin enlarges, and with making

guide portion

27,28 can stop more the more surplus tin, thereby strengthen preventing to bore a hole and 10 stopped up the effect of living by tin.

Though the utility model discloses as above with several preferred embodiments; yet it is not in order to limit the utility model; any those skilled in the art; in not breaking away from spirit and scope of the present utility model; change and retouching when doing some, therefore protection range of the present utility model should be looked being as the criterion that accompanying Claim book protection range defined.

Claims

1, a kind of circuit board perforation structure, its is used on what printed circuit board (PCB) for around the perforation of screw closure, and this perforation is coated with one deck scolding tin on every side, and its characteristic is at what:

On this layer scolding tin, be arranged with at least one guiding groove, make when this printed circuit board (PCB) is crossed tin, can utilize this guiding groove to be directed away unnecessary tin.

2, by the described circuit board perforation structure of claim 1, its feature is at the said guiding groove that is arranged with of what, and it is concaved with first guiding groove and second guiding groove, and the position of this two guiding groove is to be center and radiation setting with this perforation.

3, by the structure of the described circuit board of claim 1 perforation, its feature is at the said guiding groove that is arranged with of what, and it has two guiding grooves, and the position of this two guiding groove is to be the center with this perforation, and the parallel left and right sides that splits this perforation of what.

4, by the described circuit board perforation structure of claim 2, its feature is at the said guiding groove that is arranged with of what, and the position of this two guiding groove is symmetrical.

5, a kind of circuit board perforation structure, its is used on what printed circuit board (PCB) for around the perforation of screw closure, and this perforation is coated with one deck scolding tin on every side, it is characterized in that:

On this layer scolding tin, be convexly equipped with at least one guide portion, make when this printed circuit board (PCB) is crossed tin, can utilize this guide portion to be directed away unnecessary tin.

6, by the described circuit board perforation structure of claim 5, its feature is in the described guide portion that is convexly equipped with of what, and it is formed with first guide portion and second guide portion of protrusion, and the position of this two guide portion is to be center and radiation setting with this perforation.

7, described by claim 5, the circuit board perforation structure is characterized in that said guide portion, and it convexes with two guide portion, and the position of this two guide portion is to be the center with this perforation, and the parallel left and right sides that splits this perforation of what.

8, described by claim 6, the circuit board perforation structure, its feature is convexly equipped with two guide portion in that what is described, and the position of this two guide portion is symmetrical.