CN1112354A

CN1112354A - Junction box and PCB assembly therefor

Info

Publication number: CN1112354A
Application number: CN95104206A
Authority: CN
Inventors: C·S·李
Original assignee: Whitaker LLC
Current assignee: Whitaker LLC
Priority date: 1994-04-15
Filing date: 1995-04-13
Publication date: 1995-11-22
Also published as: MY114673A; JPH07297562A; TW254008B; KR950035555A; JP3606471B2; KR100264849B1

Abstract

A junction box and a board assembly thereof, which allow simplified construction, low cost and easy assembling. A junction box 10 comprises a housing 20 and a board assembly 30 held in the housing 20. The board assembly 30 has at least two PCBs 31 and 32 with same dimensional shape, and an intermediate insulating separator 50 and a connecting pin 40. Many through holes 34 and 35 are formed along at least one edge of PCBs 31 and 32 and the connecting pin 40 is inserted, so that, for example, they are integrated electrically and mechanically by soldering. A gap between PCBs 31 and 32 is determined by height of a rib 52 formed on an edge of the insulating separator 50.

Description

Junction box and PCB assembly therefor

The present invention relates to employed junction box and printed circuit board (PCB) assembly thereof in the electric wiring parts such as electric wiring device, particularly automobile.

Electronic equipment (electronic technology) obtains more and more widely application in various machines and system.Its exemplary is exactly an automobile.The result of semiconductor technology marked improvement is applied microprocessor on automobile, engine, side reflective mirror, window, safety device and stereo set etc. are controlled.Therefore, power supply and many holding wires are set on the automobile, for assemble, maintenance and safe ready or improvement, also various electric and structure members such as multiple connector and fuse to be arranged.

Terminal box in the past, because the distribution that needs by the above high current capacity of 10A is also arranged, so, in order to obtain sufficient current capacity, generally be the copper coin that on insulation board, directly adheres to required form with abundant thickness.

Also there is scheme to propose: the critical piece of more than one printed circuit board (PCB) (being PCB) as junction box used.In the public clear 60-7448 communique of spy, announced the exemplary of relevant other junction box.For example two PCB are enclosed in the housing abreast, utilization is supported the row's terminal with forked contact of one end margin and is interconnected, and has contact or coupling part outstanding outside housing simultaneously.The printed circuit traces that this forked contact and PCB ora terminalis form contacts and carries out being connected to each other of circuit.

In above-mentioned example before previous, because can select best thickness and the width (being sectional area) of copper coin (perhaps conductive metal) that adapts to the streaming current size, so can avoid because of producing excessive Joule heat (I ²R) abnormal temperature that causes rises.But its shortcoming is: it is very complicated adhering to adapting to a plurality of conductor circuits that size of current thickness and the different copper coin of width form required form (type) on insulation board, and cost is very high.

In addition, in the example of above-mentioned back the past,,, and also change types of conductors as required easily so price comparison is cheap because used highly effective printed-board technology.But, because the Copper Foil of PCB is as thin as a wafer, be difficult to obtain fully big current capacity, perhaps big surface area must be arranged, so problem is to be difficult to form a plurality of galvanic circles and control heating for obtaining big electric current.For this reason with the overlapping use of a plurality of PCB, but difficulty is that electric and mechanism consists of one with it.

Therefore, the objective of the invention is: provide junction box cheap and that make easily, and this junction box uses at certain intervals in parallel to each other and electric and mechanical composition is a plurality of PCB of one.

Another object of the present invention is: provide by make the electric and mechanical printed circuit board (PCB) assembly that a plurality of PCB constituted that becomes one by insulating barrier.

In order to solve the above-mentioned problem of junction box in the past, reach above-mentioned purpose simultaneously, junction box of the present invention comprises: comprise the printed circuit board (PCB) assembly of 2 PCB and the insulation shell that this printed circuit board (PCB) assembly is housed at least.This printed circuit board (PCB) assembly has: form a plurality of PCB that are essentially same size shape of a plurality of through holes at least along an edge, at the insulating barrier that inserts between these PCB be inserted in a plurality of attachment plugs of for example solder in these PCB through holes; And fix a plurality of PCB abreast and electric and mechanical composition is an one with predetermined distance.Insulating barrier and PCB are essentially same size shape (but width is slightly narrow), and have the body part of thin flat plate shape and at least along the flange of the formed certain altitude of its longitudinal edge.The height of this flange has determined the interval between the overlapping PCB.

Fig. 1: the exploded perspective view of the good embodiment of junction box of the present invention.

Fig. 2: the exploded perspective view of an embodiment of printed circuit board (PCB) assembly of the present invention.

Fig. 3: be illustrated in the insulating barrier stereogram that uses in Fig. 2 printed circuit board (PCB) assembly.

Fig. 4: the front elevation of insulating barrier shown in Figure 3.

Fig. 5: the fragmentary cross-sectional view of the variation of the printed circuit board (PCB) assembly of use obedient type attachment plug.

Fig. 6: the stereogram of other embodiment of printed circuit board (PCB) assembly.

Fig. 7: the plane graph of PCB in the printed circuit board (PCB) assembly of other embodiment.

Fig. 8: the plane graph of insulating barrier in the printed circuit board (PCB) assembly among other embodiment.

Below, the good embodiment of junction box that present invention will be described in detail with reference to the accompanying and printed circuit board (PCB) assembly thereof.

Fig. 1 is the simple stereogram according to the good embodiment of junction box of the present invention.This junction box 10 is made up of insulation shell 20 and the printed circuit board (PCB) assembly 30 that is enclosed in this enclosure interior.Insulation shell 20 is formed by having lower house part 20a and the upper case portion 20b that suitable stable on heating molded of plastic material forms.Diagram is not arranged here, and two

housings part

20a, 20b preferably utilize well-known a plurality of stopper element (for example concavo-convex stop joint portion) to combine with dismantling mutually.

The printed circuit board (PCB) assembly 30 of specific embodiment shown in Figure 1 comprises the PCB31,32 and the insulating barrier (or partition) 50 that this PCB31,32 is overlapping at certain intervals of 1 pair of same size shape.Each PCB31,32 is formed with the printed circuit traces (not shown) of a plurality of required types at least at 1 primary flat, and (this specific embodiment be a lateral edges) longitudinally forms a plurality of through

holes

34,35 at least along an edge.In this specific embodiment, PCB31,32 shapes are roughly rectangle.

Insulating barrier 50 is preferably made with the thermal endurance molded of plastic material.This insulating barrier 50 is essentially same size shape with PCB31,32, but narrower slightly.This insulating barrier 50 has the mid portion 51 of thin writing board shape and the flange 52 of both sides of the edge longitudinally.This flange 52 has identical height, and determines the interval between overlapping the PCB31,32.

A plurality of attachment plugs 40 are inserted in the through

hole

34,35 of two PCB31,32 aligned positions, method before adopting in this specific embodiment for example wicking technology (not shown) on the base around the through

hole

34,35 is carried out solder, at certain intervals fixing PCB31,32 and form one abreast.Pack in the insulation shell 20 with this PCB31,32 solders and with overlapping printed circuit board (PCB) assembly 30 by attachment plug 40 by insulating barrier 50.

Not shown among Fig. 1, PCB31,32 outside be upright a plurality of joints (positive type) contact or socket (cloudy type), and solder is on the loop trace on PCB31,32 surfaces, by upside or down the opening of

side body

20a, 20b electric connector, chip fuse etc. is electrically connected.Several openings of

insulation shell

20a, 20b are represented with Reference numeral 22.Recess 23 by insulation shell 20b can connect electric connector.

Fig. 2 represents is the exploded perspective view of an embodiment of the printed circuit board (PCB) assembly 30 that is made of 1 couple of PCB31,32, insulating barrier 50 and a plurality of attachment plug 40.Fig. 3 and Fig. 4 are respectively the stereogram and the front elevations of insulating barrier 50.Can be clear that by Fig. 2 and Fig. 3, Fig. 4 insulating barrier 50 is same size shape with PCB31,32 essence, but width is narrower slightly.This insulating barrier 50 has general planar and very thin mid portion 51 and the flange 52 of the equal height that forms on its vertical both sides of the edge, middle flat 51 also can form a plurality of openings 53 of required form.This flange 52 plays a part the interval between the overlapping PCB31,32 of decision.Flat 51 is combined in the centre of flange 52 in the middle of preferably making, and equally stretches out up and down and form flange 52 from two primary flats (surface) of this centre flat 51.

Like this, make the size shape of insulating barrier 50 and PCB31,32 size shape roughly the same, only narrower slightly, thus, can promptly superimposed abreast at certain intervals two PCB31,32, can obtain disposing the space of attachment plug 40 simultaneously along the lateral edges of flange 52.Have, the middle flat 51 of insulating barrier 50 is it to be separated the heating of dissipation two PCB effectively by the opening 53 of flat 51 simultaneously from two PCB31,32 inner surface again.

Attachment plug 40 also can be the bar-shaped plug that former designed cross section is roughly circle or square shape.Solder technology before utilizing, with such attachment plug 40 solders on through hole 34,35.Have again, as this variation, attachment plug also can be as the position at its longitudinal subdivision of being announced in the fair 3-54435 communique of spy have the existing obedient type attachment plug 40 of biddability (elasticity) part 41,42 '.With the attachment plug 40 ' be pressed into by force in the through

hole

34,35 that is aligned of distortion like this, make in two PCB31, the 32 electric and mechanisms and become one, do not need the solder between two PCB31,32 and attachment plug 41 ' to connect, can improve transaction capabilities (with reference to Fig. 5).Be pressed into operation conveniently in order to make, obedient type attachment plug 40 ' preferably have lead-in portion 43 and notch part 44 is cut off attachment plug 40 ' insertion through

hole

34,35 backs or cracking-off at recess 44 places.

Fig. 6 is another embodiment according to printed circuit board (PCB) assembly of the present invention, is made of 3 PCB31,32,33 and 2 insulating barriers 50,55.Owing between PCB31,32, inserted the 3rd PCB33, the printed circuit board (PCB) assembly 30 of this embodiment ' can form other conductive path, when increasing the galvanic circle number, can meet the needs of and increase specific galvanic circle, perhaps connect a plurality of galvanic circles side by side to increase current capacity, also just can reduce caloric value thereby reduce resistance.

What Fig. 7, Fig. 8 represented is the example of other printed circuit board (PCB) assembly.What Fig. 7 represented is the plane graph of PCB31 ', Fig. 8 represents be insulating barrier 50 ' plane graph.Be characterized in: these PCB31 ' and insulating barrier 50 ' all be non-rectangular shape.The same size shape of PCB31 ' and insulating barrier 50 ' be roughly.PCB31 ' is being formed with the through hole that a row who inserts attachment plug for example is approximately the 5mm interval on an edge longitudinally along it.Among this embodiment, insulating barrier 50 ' vertical both sides of the edge form flange 52 '.

More than, illustrated and illustrated the good embodiment of junction box of the present invention and printed circuit board (PCB) assembly, but the present invention is not limited in such embodiment.Therefore, the present invention can adapt to different purposes and carry out all distortion.For example, the flange of insulating barrier also can form on full periphery, and not necessarily wants continuously, also can form the discontinuous flange that is limited to sustained height.

Be appreciated that from above-mentioned explanation, be enclosed in the printed circuit board (PCB) assembly that consists of one in the insulation shell because junction box of the present invention has used, thus simple structure, because assembly easily, so low price.In addition, the printed circuit board (PCB) assembly is overlapping with a plurality of PCB of same size shape by the insulating barrier that has flange, keeps being parallel to each other by a plurality of attachment plugs, thereby realizes electromechanical integration, so simple to operate.Therefore, utilize well-known PCB technology, can easily realize being adapted to the junction box and the low price of special-purpose.Have again because disposed the flange of insulating barrier, so can prevent that when the solder operation foreign matter from entering between the PCB, has significant effect aspect practical along through hole.

Claims

1, a kind of junction box, it is characterized by: have to comprise and be parallel to each other substantially and the printed circuit board (PCB) assembly of at least two printed circuit board (PCB)s of electromechanical integration and the insulation shell that this printed circuit board (PCB) assembly is housed, at least 2 above-mentioned printed circuit board (PCB)s insert a plurality of attachment plugs by insulating barrier in overlapped and a plurality of through holes that form at least one edge along above-mentioned printed circuit board (PCB) and form above-mentioned printed circuit board (PCB) assembly.

2, the printed circuit board (PCB) assembly that a kind of junction box is used, it is characterized by: have: same each other size shape and be formed with at least 2 printed circuit board (PCB)s of a plurality of through holes at least along an edge mutually, slightly narrow and mid portion is thin sheet form and is formed with the certain altitude flange along both sides of the edge and is configured in insulating barrier between the aforementioned printed circuit board (PCB) than this printed circuit board (PCB), be inserted in a plurality of attachment plugs in the aforementioned through-hole on the aforementioned printed circuit board (PCB) overlapping by the aforementioned dielectric dividing plate, utilize this attachment plug, make the height determined interval of aforesaid printed circuit board (PCB) maintenance, and constitute the integral body of electromechanical integration by the said flange of aforementioned dielectric dividing plate.