SU807399A1 - Electric switch - Google Patents

Description

(54) ELECTRICAL SWITCH

one

The invention relates to electrical engineering and concerns designs of low voltage push-type electrical switches returning to their original position after a predetermined period of time after stopping, for example, switches for illuminating stairs.

Known electrical switches with retarding delay created by the air damper 1.

These switches have complex kinematics and fabrication.

Also known electrical vyupochateln, which contain a chamber formed by the housing and the lid, elastic diaphragm, movable and fixed contacts 2.

However, in this design, the volume is communicated with the atmosphere through a throttling orifice, which creates the danger of its clogging and leaving the switch out of operation.

Electric. contacts of this design are not sufficiently protected from external influences, and are equipped with metal springs,

which also adversely affects the reliability and safety of the switch.

The purpose of the invention is to increase the reliability, safety in operation and manufacturability.

This goal is achieved by the fact that the electrical switch containing the chamber formed by the housing and the lid is elastic

diaphragm, movement} 1 (fixed and fixed contacts, provided with an elastic vacuum chamber, which is connected to an elastic diaphragm, the housing and the lid are elastic and an elastic vacuum chamber is placed between them, while the elastic diaphragm is connected to an elastic cover and a moving contact, and the fixed contact mounted on the inner side walls of the elastic body.

The movable and fixed contacts are made of a yen in the form of a ring with electrically conducting sections.

Claims (2)

FIG. 1 shows the switch in the off position; in fig. 2 - the position is on; in fig. 3 and 4 - movable and fixed contacts. in the elasgically sealed casing 1 with elastic cover 2 fixed contacts 3 are fixed. On the inner surface of cover 2, there is an elastic diaphragm 4 connected to an elastic one: a vacuum chamber S. A diaphragm 4 carries on its surface a sliding contact 6, and a fixed contact 7 is fixed on the inside the wall of the elastic body 1. The fixed contact 7 and the movable contact 6 are made in the form of a ring with electrically conducting sections. External conductors 8, 9 and 10 are provided from the electrically conductive parts of the fixed contact. The electrical switch operates as follows. In the initial state, contacts 3 and 6 are open and the vacuum chamber is freely suspended from gate 2. When you press the cover 2, the latter is deformed, the contacts are closed, and the vacuum chamber 5 is sucked to the bottom of the housing. In this position, on the one hand, the external pressure (medium pressure inside the body) presses the chamber to the bottom of the body, the medium, and on the other hand, the elastic deformation reaction of the cover and the walls of the body, contacts, tend to tear the chamber from the bottom. The internal cavity of the vacuum chamber is communicated by means of a throttling hole (not shown) with the internal cavity of the housing. Air penetrates through this opening under the action of the pressure difference inside and outside the vacuum chamber. After a certain period of time, determined by the ratio of the diameter of the throttling hole to the deformation forces of the body, the vacuum chamber is detached; yes. The cover returns to its original state and the contacts change their position (open). The switch is ready for re-action. In this case, the contacts are opened with the formation of numerous breaks in the circuit, two breaks at each dynamic (or stationary) electroflug section. With a selected number of electrically conductive areas 4, as indicated in FIG. 3 and 4, the total number of breaks will be eight. When connecting an external circuit to pins 8 and 9, all eight will be connected in series to the connection circuit. When an external circuit is connected to pins 8 and 10, 2 parallel circuits of 4 each will be included in the circuit to be disconnected. 94. An electrical switch allows to increase the safety of its operation, since the electrical contacts are located in a sealed device. Due to the fact that the internal volume of the vacuum chamber and the contacts do not communicate with the atmosphere, possible failures of the switch are eliminated due to clogging of the throttling hole, contamination of the contacts. Metal springs are completely excluded in the switch design; the necessary forces are created when the elastic material of the body and contacts is resiliently deformed, as well as by increasing the pressure inside the body when the switch is turned on. This allows for improved switch reliability. The entire design of the driver, with the exception of contact surfaces and outlets, is made in the form of a single piece, stamped from an elastic electrically insulating material (for example, rubber, polyurethane and / etc.), which makes it possible to improve its manufacturability. Claim 1. An electric switch comprising a chamber formed by a housing and a lid, an elastic diaphragm, a moving and fixed contact, characterized in that, in order to increase reliability, safety in operation and manufacturability, it is equipped with an elastic vacuum chamber that is connected to The elastic daafragm, the case and the lid are made elastic, and between them lies the elasticity of the vacuum chamber, while the elastic diaphragm is connected to the elastic lid and with a moving contact, and izhny contact is mounted on the inner side walls of the elastic body. 2. Electric switch according to claim 1, characterized in that the movable and stationary contacts are made in the form of a ring with an electrical conductor. Sources of information taken into account in the examination. 1. Patent of Great Britain No. 1389120, 1975, H 1 N. 2. USSR author's certificate N 143081, cl. And 01 H 7/03, 1971. U3.1 Phie.g