SU1356026A1 - Switch - Google Patents

Abstract

This invention relates to electrical engineering and can be used in automatic switches. The invention makes it possible to increase the reliability of the construction operation. The switch contains the housing 1 of the insulating ma- | teriapa, fixed contacts 2 fixed in housing 1, self-aligning movable contact bridge 5 located on racks 12 made as a single U-shaped part 7 and installed in housing 1 can be rotated, spring 9 and a drive mechanism. U-shaped detail 7 in its middle part has two bent protrusions 14 and 15 with openings 16 II 17, into which a T-shaped detail 8 is inserted, connected to the drive mechanism by means of a spring 9, and in the gap formed by a T-shaped Part 8 and the U-shaped part 7, the contact bridge 5 with the shoulders 6 is freely positioned, with which it covers the projections 14 and 15 with a gap. Options are possible. 1 hp f-ly, 3 ill. (/)

Description

The invention relates to electrical engineering, in particular, to low-voltage electrical apparatus, in particular to switches with self-aligning contact bridges.

The purpose of the invention is to increase the reliability of the switch.

FIG. 1 shows a switch, a cut; side view; in fig. 2 - the same, front view from the fixed contacts; in fig. 3 - the unit of the movable contact system, a section, a top view.

The switch includes a housing 1 of insulating material, one or two pairs of fixed contacts 2 fixed on current-carrying elements 3, to which external conductors 4 are attached, a self-aligning contact bridge 5 with shoulders 6, U-shaped piece 7, a restricting element in the form of T- figurative parts 8, the spring 9, the lever 10 and the axis 11,

The U-shaped part with its legs 12 is placed in the recesses 13 present in the body and can be rotated around the line of contact between the ends of the part and the recesses. The U-shaped part in the middle part has two bent protrusions 14 and 15 with rectangular holes 16 and 17, into which the T-shaped part 8 enters. At part 7 between the projections 14 and 15, extrusion 18 is extended, and at part-8 - Step 19. Both extrusions are arranged symmetrically with respect to the contact bridge 5.

Clicking on the contacts creates a spring at 9, one end of which is fixed to part 8, and the other end is connected to | End of the lever-10. When the contact cycles are closed, the force of the spring 9 acts on the contact bridge 5 via extension 18, and if there are two pairs of fixed contacts (the second pair is not shown on the drawing), also through the extension

nineteen.

The axis 11, on which the lever 10 rotates, is placed in the recess 20, which is located on the housing 1 (Fig. 2), and is kept there due to the spring tension. The holes 21 in the housing 1 are designed to strengthen the switch.

The device works as follows.

When nalsatiya protruding from the body 1 shoulder lever 10 last

five

0

five

0

five

0

five

five

rotates around the axis 11 in a clockwise direction, moving the end of the spring 9 attached to it. At a certain position of the lever 10, when the force of the spring 9 is directed on the other side of the pillars 12 of the U-shaped part 7, it is rotated around the end contact line racks 12 with the surface of the grooves 13. The contact opens.

Upon termination of pressing the lever 10, it is returned to its original position by the force of the spring 9, transferring the direction of the force of the spring 9 to the opposite side of the uprights 12 of the U-shaped part 7. The U-shaped part 7, together with the contact bridge 5, rotates abruptly towards the closing. A contact bridge 5 with fixed contacts 2 closes. In this case, the contact bridge 5 which is freely located between the U-shaped piece 7, its projections 14 and 15, and the T-shaped piece 8, connects the bridge 5 to the fixed contacts 2 under the action of the transmitted on it through the extrusion 18 force spring 9. The shoulders 6 limit within the gap the longitudinal movement of the contact bridge 5 relative to the projections 14 and 15.

If there is a second pair of fixed contacts to close them with a movable bridge 5, it is necessary to press the lever 10. At the same time, one pair opens and the other closes in the same way as described above with the only difference that the contact bridge 5 is pressed to the second pair of fixed contacts The steps 19 performed on the part 8.

In the device, due to the free installation of the contact bridge in the U-shaped part, the absence of harmful frictional forces in the places of their conjugation, the contact presses are evenly distributed and the self-installation of the contact bridge is highly reliable.

Claims (1)

1. A switch comprising a case of insulating material, fixed contacts, a U-shaped part with a bent protrusion having a pivotally mounted opening, a self-aligning movable contact bridge, a spring and a drive mechanism, characterized in that, in order to increase reliability, it is provided with a restriction element, the U-shaped part is provided with an additional bent protrusion having also an opening , while both protrusions of the U-shaped part are located in its middle part, and the contact bridge is made with shoulders, the restriction element is inserted into the holes of the bent protrusions of the U-shaped part , is located with a gap relative to it and is connected through a spring with a drive mechanism, and the contact bridge is freely located in said gap formed by the U-shaped part and the restricting element so that its shoulders with a gap cover the bent projections of the U-shaped part. 2, a switch according to claim 1, characterized in that, in order to increase the uniformity of the contact pressing, the U-shaped part between its bent protrusions and the T-shaped element is made opposite to the contact bridge and located symmetrically relative to it. // 7 12 L5 FI.2 /five IB Editor L. Povhan Compiled by N. Petrakova Tehred M.DVDYK Proofreader G, Reshetnik Order 5798/45 Circulation 697 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 FIG. 3