DE1790256B2 - TERMINAL BOX FOR LOCALLY SELECTABLE AND DETACHABLE FIXING IN A POWER BAR DEVICE - Google Patents

Description

The invention relates to a junction box for locally selectable and releasable fastening in a power strip device consisting of a hollow support strip open on one side with enclosed power conductors and protective earthing rail, consisting of a head part that can be inserted into the power strip and therein arranged, each designed as resilient, individually fastened tongues in the box, the are intended for contact with the conductors and the protective earth rail in the power strip.

Such a junction box with power strip device is suitable, for. B. for shop windows, showrooms, Laboratories, etc., for power supply to e.g. B. attached to the ceiling or walls, often relocatable small-scale electrical appliances or devices. The electricity becomes the power strip using suitable junction boxes or adapters with an upper detached one in the power strip insertable head part and excellent contact fingers that make contact with the conductors and the protective earthing rail are determined, taken at the desired point along the Power strip can be connected.

Such junction boxes and power strip devices are, for example, from the USA patent 3,286,052 became known. The attachment of the junction boxes in the power strip device takes place independently of the electrical contacts by a clamping device in which by a threaded screw clamping jaws pressed into the legs of the metal rail of the power strip device will. The contact between the contact fingers and the conductors takes place after attachment of the connection box in the metal rail by pivoting the head part carrying the contact fingers by means of a separate handle, whereby the contact fingers, which are fixedly arranged in the head part, are simultaneously come into contact with the conductors assigned to them. This construction of the junction boxes does not allow any irregularities in the course of the power strips for proper contact balance. Different handling is also necessary for fastening and making contact, which is the overall construction of the junction box

ίο make it laborious.

In another known type of junction box (German Auslegeschrift 1 177 232) are Head parts through openings provided at certain points in a power strip device.

plugged. The connection box is attached by locking behind the opening. Making contact takes place by rotating the connection box by about 90 °, with this rotational movement being resilient in the Terminal box arranged contact fingers in contact

ao tion with conductors within the power strip device to be brought. The disadvantage of this construction is that the junction boxes are only used on certain Make the power strip can be attached and only by detaching it from the power strip special unlocking of the locking device engaging behind the opening is possible.

Both of the known junction boxes mentioned with power strip devices have a common disadvantage that for making contact, the contact fingers are rotated to the current conductors along an arcuate Approach trajectory. The same applies to the removal of the contact fingers from the Conductors. This has the consequence that in a phase of both connecting and disconnecting the Contact finger there is only one point contact, which favors arcing.

The invention has for its object to provide a junction box of the type mentioned for fastening in to train a power strip device so that simultaneously with the attachment of the terminal box

in the power strip device with one and the same handle always good contact between the Contact fingers and the conductors.

To solve this problem, the invention proposes that in the box for each contact finger an eccentric is arranged which, when the common switch button is rotated, the corresponding Contact finger between a retracted layer and a layer pushed out of the head part moves, in which they engage behind retaining strips provided in the support strip of the power strip device.

This ensures that the contact is made separately and precisely for each contact finger, even below Adjustment of the resilient hand pressing pressure is achieved, and the extended contact fingers are used at the same time as a holder for the junction box in the power strip device; a special fastening device not applicable. With the attachment, the contact is made in a line contact at the same time reached between contact finger and conductor. In addition to the advantage that a line contact a better Makes contact with the conductor, the risk of arcing is also reduced by that the contact surface of the contact finger of the rail is approached and removed in a parallel position will.

In an expedient embodiment of the invention are

the eccentric arranged in the connection box and designed in relation to one another that at a rotation of the eccentric of the contact fingers or the fingers for the protective narrowing rail of the power strip in front of the other contact fingers in the extended position and in contact with the earthing rail are bringable. This means that, in addition to the immediate attachment without live contact, with the still a possibly desired shifting of the box in the power strip is possible, at the same time the Protective earthing regulations Satisfied, since the earthing contact is in front of the contact with live conductors closed is.

In the drawing, embodiments of the invention are shown, for example, and in the following Description explained. It shows

F i g. 1 shows a cross section through a single-phase power strip device for a junction box,

F i g. 2 shows a multiphase power strip device in cross section,

F i g. 3 and 4 a power strip device with connection box in earth view or side view, and

F i g. 5 shows a connection box for a multiphase power strip device in section along the line AA in FIG.

The F i g. 1 and 2 are included only to explain the subject matter of the invention in an understandable manner to be able to. However, they do not belong in the scope of protection of the subject matter of the invention.

In Fig. 1 denotes 1 serving as a protective earthing and support structure, the z. B. off may consist of a bar extruded aluminum. With an insulating and holding bar is referred to, the z. B. can be made of PVC plastic. 4 and 5 denote current conductors, which consist of a round or flat rectangular copper wire. The arcuate part 10 of the plastic retaining strip 2 is made so much larger that the retaining bar 2 is somewhat under tension when it is on their place in the support strip 1 is fitted. The position of the conductor arranged in the holding bar 2 4 in relation to the support strip 1 is through the layer thickness of the parts 6 and 7 of the insulating and Retaining bar 2 determined. In the same way, the position of the conductor 5 in relation to the support strip 1 determined by the layer thickness of parts 8 and 9 of the retaining bar.

In Fig. 2, a power strip device for a multi-phase system is shown. In addition to the insulating and retaining strip 2, it comprises another identical retaining strip 2 'with current conductors 11 and 12. Here, the conductors 4, 11 and 12 are suitably used, for example ■ ^ τ, ι "
use the oil

and T Ui einsm three-phase system unu _g ^ _{the pole N yer.}

gP ^ ^ gadefete ι is protective earthed, bound is pie iragi ^ chmfikasten 13, the

In the J ig. J ¹ T ^ "" jchtung is connected to a Jt ^ eistenv ^ ^ I ₃ comprises contact shown L) he Ans. ^ ^ _{Stronüleitern 4j}

fingers 14, 15, «> unu, ^ _{connection box be} -S 11 and 12 £ ° ™ ^aKl ' _{tfm X8} and 19, which are connected to the

^atet / ^ f ^ S have contact, whose bottom «eerfeten ^« steJ ^ K ^ splash at the same time

the ^{ι ιη} ™ _ε ; Γ _η ⁸ fj ^ the contact fingers 18, 19 and * 8 <* Hdtdeurten ^ ur _

then for ^ ^A ^ hum _junction box 13

_n f: _{he h} d line-Λ Λ in F i g. 4. The con- ^ nachderL1 _verhaltnism like _ßi g hard,

, H ^ n material ζ B made of bronze, resilient material z. a ^ _{trunk deg an}

5gt means of a in the fuselage of the

Contact finer in relation to the head part of the Ka- _Kontaktnger m ncn and an ex-

«Au« «*». ™ * ™ ξ% _{are> and zw} ar verscnooe ^ E ^ ter 20 tra-

^ Kg [^^ _{15 is} ^ ₁₁₆ I ₈ the-

ssen ^ J ^ ^

^ _n fV ₉ are also fe-

SrnJ "attached to the trunk of the connection box and derncI amι Rumr" α _der ^ _{22 ange} .

i2TSSffl through the respectively assigned Exto toch the knob 23 rotatable axis

creates weraen.

When the connection box 13 is to be inserted into the power strip, a button 23 (F i g. 3 and 4) the eccentric 20 and at the same time the eccentric (not shown) for the remaining contact fingers rotated in such a position in which the contact fingers are drawn in, the connection box can be easily inserted into the power strip. The shapes of the eccentrics 20 are expediently introduced in such a way of the junction box by turning the knob 23 to 19 in the extended path, the protective earthing contact 10 imu 17 first in contact with the grounded Support bar 1 are brought before the remaining contact fingers 14 to 17 make contact with the corresponding Get conductors 4, 5, 11, 12 to ensure a protective grounding of the consumer, before it is connected to the conductor.

1 sheet of drawings

Claims (2)

Patent claims: 1. Junction box for locally selectable and detachable fastening in a power strip device from a hollow support strip open on one side with internal conductors and protective earthing rail, consisting of a head part which can be inserted into the power strip and which is arranged therein trained as resilient, individually fastened tongues in the box, the Contact with the conductors and the protective earthing rail in the power strip are intended, characterized in that an eccentric (20) is arranged in the box for each contact finger is that when the common switch button (23) is rotated, the corresponding contact fingers shifts between a retracted layer and a layer pushed out of the head section, in which they engage behind retaining strips (2) provided in the support strip (1). 2. Box according to claim 1, characterized in that the eccentric (20) arranged in such a way and are designed in relation to one another that upon rotation of the eccentric of the contact finger or the fingers (18, 19) for the protective earthing rail of the power strip in front of the rest Contact fingers (14 to 17) in the extended position and in contact with the earthing rail are bringable.