CZ410697A3 - Contact mechanism of electric wiring devices - Google Patents

Abstract

Contact means for electric installation equipment have pin-shaped or tongue-shaped connecting lugs (5.1) that can be plugged into a pocket-shaped clamping piece (1) of the installation equipment and elastically establish a contact therein. In order to ensure with such contact means a reliable and lasting connection between the connecting lugs (5.1) of a bus bar (5) and the corresponding clamping piece (1) with a low transfer impedance, a hollow cylindrical spring body (3) is arranged in the clamping piece (1) to generate at the periphery the contact forces between the connecting lug (5.1) and a contact surface (1.3) of the clamping piece (1). The spring body (3) is preferably shaped as a pressure spring whose windings however are relatively closely spaced and radially biased. These contact means are particularly suitable for electrically connecting circuit breakers and other serial built-in equipment to commercially available, pluggable bus bars.

Description

SUMMARY OF THE INVENTION It is an object of the invention to improve the plug-in contact device of the above-mentioned type from the cost point of view, while providing a secure connection with low transition resistance between the connection strips and the corresponding terminals of the installation devices.

This object is achieved by a contact device having the features of claim 1. Further advantageous embodiments of the invention are set out in the dependent claims.

The invention has the advantage that the contact device is very small.

and therefore can be placed in the housing of the device spatially below the existing screw connection terminals and can be connected to them. This also makes it possible, independently of one another, to make the most common screw connection from the side, as well as a plug-in contact from the underside of the device.

Large dimensional tolerances can also be overcome and uniform contact forces can be achieved with multiple contact points according to the number of turns of the flexible body. Due to the swivel arrangement of the flexible body, the insertion forces for the supply belts are small and externally low.

Overview ....... fig. ....... on ........ drawings

The invention is explained in more detail below with reference to the drawing.

Examples ....... design ......... creep

Only the schematically shown contact device is located in the housing of a not shown installation device and has a terminal .1 .. which is connected in one piece to the screw connection terminal 2. The screw connection terminal 2 comprises, as a known type, a terminal part 2.1 which is anchored with a .2 ..., .. 2 screw. on the pressure part

As a result, the electrical conductor can be formed in a conventional manner by a wire in the direction of the arrow of the installation device.

in the party at

In the region below the clamp, preferably, as provided with the frame part 1.1, the part 2.1, there is a clip 1, 1, formed by extensions of the pressing part, which is shaped into a pocket shape 2 ..., ... 3 and is therein a flexible cylindrical body of the principle 3

The elastic body 3, the longitudinal axis of which is in is on • · · · · ·

drawing perpendicular to the drawing. At least after insertion into the frame part 1.1, the threads of the elastic body 3, which is secured against falling out only by the outline of the casing 4 shown schematically, are closely adjacent to each other. On the other hand, the elastic body 3 can rest on the bearing surface 12 in addition to the curvature 1.2 ', so that a gap remains in relation to the opposite contact surface 1.3, the width of which still depends on the dimensions of the connecting strip 5.1.

protruding on the busbar 5.

connector strips 5.1 in the form of pins on conventional connection terminals

These are located by the spacing of the installation device and in general or by the tongue.

Above this opening 4. 1, therefore, with the contact surface 1 ... 3 and the housing of the connection strip 5.1, in the direction of further connection of the series-connected devices. In addition to the screw connection terminal .2.

for plug-in connection with the contact in the housing on the underside of the device.

the lower dimension of the gap between the bodies 3 corresponds to the thickness of the insertion of the elastic connection strip, whereby

5.1 in the arrows 5.2, the corresponding cylindrical oval deformed.

flexible body radially

In this case, the elastic unions of the elastic body abut against the connecting bodies 3 and press against the contact surface 1.3. In addition, this force is also transmitted to the bearing conductively connected parts of the elastic bodies by conductivity, the ace .3 made by conducting the current with the strip 5. 1 the elastic surface 1.2, which is assisted with the clamp. electric even better.

Due to the large radial deformation of the elastic body 3, considerable tolerances can be overcome at the same contact force, which arise on the installation device both for production reasons and in particular due to the busbar 5 as a part supplied by different manufacturers. Furthermore, the contact force in a wide range can be adapted by means of the diameter of the elastic body 3 or the wire used for its production.

technical requirements. Furthermore, the insertion band 5.1 is relatively low. since the elastic body 3 can, during insertion, perform a folding movement about its longitudinal axis with minimum friction within the frame part 1.1.

The length of the elastic body 3 is dependent on the depth of the frame part 1.1 and is adapted with a sufficient margin to the width of the conventional connecting strips 5.1. wherein the windings preferably with slight preload abut the frame need not be a flexible body 3 made of part 1. 1. In addition to the wire, it can also be without departing from the scope of the invention.

made of a flat elastic strip, for example in the form of a clamping sleeve.

Claims (5)

A contact device for electrical installation devices for plug-in connection by means of a connector strip (5.1) in the form of a pin or tongue, for resiliently contacting the pocket clamp to a terminal (1) of installation devices characterized by (1) resilient in that in the form of a hollow cylinder, wherein a contact force (5.1) is formed on the connecting strip (5.1) between the connecting strip (5.1) and the contact surface (5.1) 1.3). The contact beam according to claim 1 is formed by a resilient thread (3) of threads abutting one another and 1, characterized by a compression spring of which they are radially loaded. Contact device according to claims 2 and 2, characterized in that. The spring body (3) is loosely supported and secured against falling out in the frame part (1.1) of the clamp (1), with its longitudinal axis perpendicular to the direction of insertion of the connecting strip (5.1). Contact device according to claims 1 to 3, characterized in that the resilient body (3) is supported on the side opposite to the contact surface (1.3) on the bearing surface (1.2) and on the bend (1.2) of the clamp (1). Contact device according to Claims 1 to 4, characterized in that the clamp (1) forms part of the screw connection clamp (2) and is preferably located on its bottom part within the housing of the pedestal. Contact beam according to one of the claims, characterized in that the clamp (1) consists of a separate frame part (1 - 1), which grips the contact surface (1.3) connected to the screw connection clamp (2) and the resilient body (1). 3). Contact body according to claim 1, characterized in that the clamp of the connecting part which supports the flexible body (3). The contact body of the protection switch (5), characterized by (2) depending on the line or the like. mounted on the pin bottom of the terminal housing (1). One of claims 1 to 5, characterized in that a screw-in insertion is provided below the clamping part (2.1). in the form of a longitudinal cage, the tape (5.1) of the connecting claims 1 to 7, juxtaposed and in particular for connection to other in-built devices, that the connecting busbars (5) of the pedestal are clamped by the tape and are (4.1) ( 5.1) are retracted from Pi ifM -n