SU143081A1 - Electric switch - Google Patents

Description

A button-type electrical switch is known with a shut-off time delay, performed by restoring the original volume of the vacuum chamber. A vacuum chamber is formed between the notch in the switch body and the diaphragm, which bends under the influence of the push button. Moving contacts are fixed on the push-button rod.

A disadvantage of the known electrical switches is the unreliable operation of the contact system.

An electric switch made according to the invention is free of this disadvantage. The essence of the invention consists in making movable contacts in the form of two joint-type flip plates connected by a common spring. The plates are fixed with one end in the button stem and are supported by free ends, respectively, on fixed contacts or on an insulator.

FIG. 1 shows the proposed electrical switch, side view; in fig. 2 - the same, top view; in fig. 3 shows a section along A-A, FIG. 2 is in the off position; in fig. 4 is a section along the A-A, in FIG. 2 is in the on position; in fig. 5 is a section along BB in FIG. one; in fig. 6 is a section along BB in FIG. 3

The switch consists of a cover 1, two moving contacts 2, a spring 3, a cover 4, a screw 5, a valve 6, a bracket 7, a spring 8, a screw 9, a diaphragm 10, a housing 11, two screws 12, two fixed contacts 13, two terminal clips 14, two screws 15 and a special washer 16.

During operation, by pressing the button 17, the diaphragm 10, lying freely on the walls of the chamber, bends so that its center touches the bottom of the chamber, the edges are bent in the direction opposite to the direction of the applied pressing force, the air is removed from the chamber partially through the calibrated orifice, but O :: IOB No. 143081-2 on the part of the vazdu |; there is an exit between the edges of the chamber and the "detaching edges of the diaphragm."

When the pressure on the button 17 is stopped, the diaphragm 10 partially rectifies, and its edges stick to the walls of the chamber.

The elastic stresses of the diaphragm 10, straining and straightening it, induce air through the calibrated orifice.

t. The air in the chamber accelerates the process of straightening the diaphragm, balanced by the force of the compressed coil spring 8, and after a time of 1.25-2.25 minutes (depending on the position of the adjusting screw), the button instantly activates, causing the contacts to open.

The presence in the mechanism of the spring switch does not reduce the performance characteristics determined by the requirement of GOSTs on similar installation products expressed in 20,000 inclusions, which is not a limit to the proposed switch design. (Springs under similar conditions of operation withstand more than 40,000 strains).

Subject invention

A button-type electrical switch with a shut-off time delay, performed by restoring the original volume of the vacuum chamber formed between a recess in the housing and a spring-loaded diaphragm, bending under the influence of a push button, on the rod of which movable contacts are strengthened, characterized in that, in order to increase reliability the work of the contact system, the movable contacts are made in the form of two connected by a common spring flip plates, fixed at one end in the button shaft and resting one ends respectively to fixed contacts or to an insulator.

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