FI94992B - Junction box for busbar adapter - Google Patents

Description

94992

Junction box for busbar adapter

The invention relates to a junction box for a busbar adapter, which enables the use of said power supply adapter in non-rail locations and comprising a body with a connection space for connecting the adapter to the box and current and ground contacts connected to the connection space for power supply of the adapter; and a cover that covers the switch-10 of the body adapter on the field side and has a connection opening at the connection space of the body.

Contact bus systems are now quite commonly used in various rooms to connect luminaires, small machines and the like to a power source by means of a power supply device, i.e. 15 adapters.

There is also often a need to use luminaires, etc., suitable for these adapters in locations where there are no busbars or where it is not possible or reasonable to install these busbars. For this purpose, junction boxes compatible with 20 adapters have been designed, which can be mounted as a conventional surface or flush mounting in a desired location, for example on a wall or ceiling, and to which electrical power is connected by means of conventional electrical cables.

However, the problem with junction boxes of the type mentioned at the beginning is the installation of power and earthing contacts and the connection of electrical wires to them, which are held in place by screws for fixing electrical wires, which are detached after removal, making it particularly difficult to hold in place. Dropping the contacts, on the other hand, most often means losing them.

The object of the present invention is to eliminate the above-mentioned drawback. This object is achieved by a junction box 2 94992 according to the invention, characterized in that each contact has a fastening tab and at each contact fastening point in the body a slot towards the bottom of the body for the fastening tab 5, and that each tab is .

The invention is based on the idea of using a form lock between the contact and the body of the junction box, whereby the contact chain remains in place even when the screw for connecting the electric cable is removed. This form-locking of the contact according to the invention can be performed by assembling the junction box with a simple pressing movement, as a result of which the contact is fixed in place. This solution considerably speeds up and simplifies the making of the connections and the assembly of the box itself, the solution being also as simple and inexpensive as possible.

Most preferably, this shape locking is implemented by weaving the opposite side edges of each tongue so that the lower edge of the tongue is slightly narrower than the upper edge, whereby the tongue engages the gap by means of a wedge effect.

This bevel of the side edges of the tabs can be, for example, of the order of about 5 °.

In the following, the invention is explained in more detail in one; By means of a preferred exemplary embodiment with reference to the accompanying drawings, in which Figure 1 shows an exploded view of a junction box according to the invention, Figure 2 shows the same junction box seen from above, * Figure 3 shows section 3-3 of Figure 2, Figure 4 shows section 4-4 of Figure 2, and Figures 5 and 6 are perspective views of current and ground contacts according to the invention.

The switch 3 94992 according to the invention shown in the drawings comprises a body 1 with a connection space 2 for connecting an adapter (not shown in the drawings) to the box and current and ground contacts 3, 4 and 5 attached to the connection space 2 for receiving current from the adapter; and 5 a cover 6 covering the body 1 on the coupling side of the adapter and having a coupling opening 7 at the coupling space 2 of the body. The adapter not shown may be, for example, of the type described in FI patent application 931743.

Each contact 3, 4, 5 has a mounting tab 10 3a, 4a, 5a and at each contact mounting point in the body 1 a slot 9, 10, 11 facing the bottom 8 of the body for the mounting tab 3a, 4a, 5a, each tab 3a, 4a, 5a being in the slot 9, 10, 11, when pressed into it by its shape, engages and locks the contact 3, 4, 5 in place 15.

The opposite side edges of each tongue 3, 4, 5 are bevelled so that the lower edge of the tongue is slightly narrower than the upper edge, whereby the tongue 3, 4, 5 engages the gap 9, 10, 11 by means of a wedge effect. Preferably, the bevels of the si-20 edge edges are of the order of about 5 ° (Angle α in Figures 5 and 6).

The slots 9, 10 and 11 and their walls are located substantially perpendicular to the base 8 of the body 1 and the walls are dimensioned to correspond substantially to the thickness and width of the tongues 3a, 4a and 5a, but narrow enough in the width direction of the tongues to provide tongues 3a. , 4a and 5a wedge the side edges into the respective walls of the slots 9, 10 and 11 and consequently lock the locks in place.

The contacts 3, 4 and 5 have connection parts 3b, 4b and 5b bent 90 ° with respect to the tabs 3a, 4a and 5a to which the wires of the electric cable to be routed to the box (not shown in the drawings) are attached to the screws 12, 13 and 14 and their mating pieces 15, 16 and 17. Loosening or removing screws 12, 35 13 and 14 does not affect the attachment of contacts 3, 4 and 5 in any way.

As can be seen from Fig. 3, the wall of the connection space 2 of the body 1 has openings 18 and 19 through which the contact fingers of the adapter can be connected to the contacts 3 and 4.

The contact 5, in turn, has an additional tab 5c extending from its locking tab 5a to the bottom surface of the connection space 2, by means of which a ground connection is made between the box and the adapter.

In particular, in order to ensure that the contacts 3 and 4 adhere to their mounting slots 9 and 10 completely, the cover 6 has clamping tongues 20 and 21 arranged in the slots 9 and 10 as shown in Fig. 4, which press the contacts 3 and 4 into the slots 9 and 10 with the cover 6 attached. place.

The drawing and the related description are only intended to illustrate the idea according to the invention.

However, its details may be modified within the scope of the appended claims without departing from the scope of the invention. Thus, the locking of the contacts could be carried out by, for example, a snap connection between the locking tabs and the locking slots, although this solution is not described in detail in the description of the invention.

Claims (4)

1. A junction box for a power strip adapter, which allows the said power supply adapter to be used on the frame where there are no rails and which box comprises a frame (1) with a coupling space (2) for coupling the adapter to the box and in connection attach to the switching equipment (2) Power and grounding contacts (3, 4, 5) for the power supply of the adapter; and a cover (6) covering the frame (1) on the coupling side of the adapter and having a coupling opening (7) at the coupling space (2) of the frame (1), characterized in that each contact (3, 4, 5) has a fastening projections (3a, 4a, 5a) and the frame (1) show a slot (9, 10, 11) directed towards the bottom of the frame (9, 10, 11) for each contact fastening point, and that each projections (3a, 4a, 5a) grabs the slot (9, 10, 11) and reads the connector in place as it is pressed into the slot. Box according to claim 1, characterized in that the opposite side edges of each projection (3a, 4a, 5a) are thus bevelled so that the lower edge of the projection is slightly narrower than the upper edge, whereby the projection engages the slot ( 9, 10, 11) due to wedge action. Box according to claim 2, characterized in that the side edges of the projections (3a, 4a, 5a) are chamfered about 5 °. Box according to any of the preceding claims, characterized in that the cover (6) has at the projection slots (9, 10, 11) arranged at the protrusion slots (9, 10, 11) which push the contacts (3, 4) and secure -or their attachment to the box frame (1) where the lid (6) is mounted in place.