RU2579008C1 - Switching device - Google Patents

Abstract

FIELD: electronic equipment.

SUBSTANCE: invention relates to electrical engineering, namely to switching equipment, and can be used in low-voltage electrical equipment. In initial condition control lever (7) is pressed, for example, to stop (2), contact (4) is open, and contact (5) is closed to movable contact-membrane (8). Required contact pressure and pressure force of the handle to stop is created by elastic force of membrane (8), which is partially deformed. For switching contacts transferred handle (7) in direction of stop (3), increasing deformation of membrane, and as soon as latter turns of unstable balance position, it will jump in other extreme position. At that, membrane (8) will press against static contact (4) and due to accumulated energy of elastic deformation will bring and press handle (7) to stop (3). As a result contact (5) is open, and contact (4) is closed.

EFFECT: simplified design and enlarging functional capabilities.

6 cl, 6 dwg

Description

The invention relates to electrical engineering, namely to switching equipment, and can be used in low-voltage electrical apparatus.

The prototype is a switching device containing a micro switch with a drive element, a switching element made in the form of a flexible plate with protrusions, a control handle, spring struts with holes in which the protrusions of the plate are inserted, while the control handle is located on a flexible plate that is mounted coaxially with the drive microswitch element with the ability to interact with it [A. from. USSR No. 803037, IPC H01H 21/00, 1981].

The disadvantages of the prototype are:

- design complexity;

- limited functionality.

The objective of the invention is to remedy these disadvantages, namely, simplifying the design and expanding functionality.

The problem is solved in that the switching device containing an elastic element located on a swinging control handle interacting in an extreme position with a stop is provided with fixed contacts that can interact with an elastic element made in the form of a movable contact, while the distance between the fixed contacts is not more than the distance from the points of interaction of the elastic element with fixed contacts before and after the jump.

The elastic element is made in the form of a popping membrane. The fixed contact is made in the form of a bimetallic plate. The emphasis is made in the form of an electromagnet and at least part of the control handle is made of magnetic material. The membrane is made integral with the control handle. Part of the control handle is made in the form of a permanent magnet.

These distinctive features allow you to achieve the following advantages compared with the prototype.

The supply of the switching device with fixed contacts that can interact with an elastic element made in the form of a movable contact, while the distance between the fixed contacts is not greater than the distance from the points of interaction of the elastic element with the fixed contacts before and after the jump, simplifies the design, which, according to essentially consists of three parts - the housing and contacts.

The implementation of the elastic element in the form of a popping membrane simplifies the design, making it possible to make the elastic element integral with the control handle.

Making a fixed contact in the form of a bimetallic plate expands the functionality of the device, which, when the contacts are heated by current, disconnects the load, i.e. additionally performs the function of a thermal relay.

The emphasis in the form of an electromagnet and at least part of the control handle made of magnetic material expands the functionality of the device due to the remote control of the switch. The implementation of the membrane at the same time with the control handle reduces the number of parts of the device, which simplifies its design.

The execution of part of the control handle in the form of a permanent magnet expands the functionality of the device, allowing you to set the movable contact in the desired position by means of bipolar pulses supplied to the electromagnets.

The invention is illustrated by drawings.

In FIG. 1 shows a switching device before switching contacts. In FIG. 2 shows the device at the time of switching contacts. In FIG. 3 shows the device after switching contacts. In FIG. 4 shows the device at the time of switching contacts from heating by their current. In FIG. 5 shows the device after switching contacts heated by current. In FIG. 6 shows a device with a permanent magnet in the control handle.

The switching device comprises a housing 1 with stops 2, 3, fixed contacts 4, 5 and with an axis 6, on which the control handle 7 interacting with stops is mounted with a possibility of rotation, with an elastic element (membrane) 8 that can interact with fixed contacts, which can be made with a bimetallic plate 9. The emphasis can be made in the form of an electromagnet with a coil 10, and a permanent magnet 11 can be installed on the control handle.

The switching device operates as follows.

In the initial state, the control handle 7 is pressed against one of the stops, suppose to the left 2 (Fig. 1). In this case, the contact 4 is open, and the contact 5 is closed with the movable contact — the membrane 8, the necessary contact pressure and the pressing force of the handle against the stop is created by the elastic force of the membrane 8, which is in a partially deformed state, i.e. the dome of the membrane is not fully extended.

To switch (turn off, open) the contacts, move the control handle 7 in the direction of the stop 3, increasing the deformation of the membrane, and as soon as the latter moves to the unstable equilibrium position (Fig. 2), it will jump (snapping) to another extreme position. In this case, the membrane 8 abuts against the fixed contact 4 and, due to the accumulated energy of elastic deformation, brings and presses the control handle 7 to the stop 3 (Fig. 3). As a result, contact 5 will be open, and contact 4 will be closed.

If a fixed contact is installed on the bimetallic plate 9, then when it is heated by the current passing through the contacts, it will bend along with contact 5, making the membrane 8 deflect to the position of its unstable equilibrium (Fig. 4). Further deflection leads to a jump of the membrane to another extreme position and opening of the contacts (Fig. 5). After cooling of the plate 9, the contacts can again be closed by moving the handle 7 to the stop 2. Due to this, the device can additionally perform the function of a thermal relay.

If the stops are made in the form of electromagnets, and the handle 7 is made of magnetic material, then you can remotely switch the device by applying voltage to the coil 10 and pulling the handle to the desired stop. The presence of magnet 11 allows you to set the handle in the desired position, forming the corresponding poles on the stops, one of which will create a repulsive force on the handle, and the other will attract. Note that the conclusions from the fixed contacts are performed in the usual way, and on a movable, for example, a flexible wire or a tap from the membrane, embedded in the housing and acting as the axis 6.

The implementation of the invention will allow you to create a simple design switchgear with advanced functionality.

Claims (6)

1. A switching device containing an elastic element placed on a swinging control handle interacting in an extreme position with a stop, characterized in that it is provided with fixed contacts having the ability to interact with an elastic element made in the form of a movable contact, while the distance between the fixed contacts no more than the distance from the points of interaction of the elastic element with fixed contacts before and after the jump. 2. The device according to p. 1, characterized in that the elastic element is made in the form of a popping membrane. 3. The device according to claim 1, characterized in that the fixed contact is made in the form of a bimetallic plate. 4. The device according to claim 1, characterized in that the emphasis is made in the form of an electromagnet and at least part of the control handle is made of magnetic material. 5. The device according to any one of paragraphs. 1, 2, characterized in that the membrane is made integral with the control handle. 6. The device according to any one of paragraphs. 1, 4, characterized in that the part of the control handle is made in the form of a permanent magnet.

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