SU736198A1 - Multi-row change-over switch with automatic release - Google Patents

Description

one

Multiple switch with automatic. The CMM reset is intended for use in centralized control devices.

A multi-switch with automatic reset is known, which contains electromagnets with windings and their power source, rows, including, push-button and limit switches, the moving contacts of which are interconnected, and the fixed closing contacts of the end switches of all rows are connected to the power supply terminal one .

The disadvantage of this switch is low reliability due to insufficient electrical insulation strength between the circuit and the housing and between the electrical circuits of the circuit.

The aim of the invention is to increase the reliability of the switch by increasing the electrical strength.

This is achieved by the fact that the proposed switch is provided with an additional low-voltage power source and auxiliary relays, the contacts of which are connected to the power supply of the electromagnets and to the terminals of the windings of the electromagnets, the other terminals of which are connected to fixed disconnecting contacts of the limit switches. The movable contacts of the push-button switches through the windings of the auxiliary relays are connected to one terminal of an additional power source, and the fixed contacts of the push-buttons of all rows are connected to its other terminal.

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FIG. 1 shows a circuit diagram of the proposed switch; in fig. 2 - button switch.

An automatic reset multiport switch contains in each row (on

15 of FIG. 1 shows the first and last rows of the push-button (key) switches with buttons (keys 1), return springs 2, a reset bar 3 with a return spring 4, and switching contacts 5.

Claims (1)

20 Reset bar 3 has a bevel on which the pin fixed on the cortex 6 of the electromagnet, and a series of figured Holes 7 (according to the number of switches in the row), in which the ends of the pins 8 attached to the rods of the 9 buttons of the 1st switch are located, are detached. An end switch 10 is installed at the end of the reset bar 3. The electromagnet winding 11 is powered from source 12. The movable contacts of the 13 push-button switches of all rades are connected. The movable contacts 14 of all limit switches 10 are also interconnected. Fixed closures: the contacts 15 of the limit switches 10 are connected to each other and to the power supply terminal 12. The multi-switch is provided with DO; an additional low-voltage source of voltage 16 n relay 17 with winding fulHiiH and contacts 18 19. Pins 19 are connected to one for example: put: a power supply terminal 12, and pins 18 - to the first pins 20 of the windings 11 of the electromagnets. The terminals 21 of these windings are connected to non-direct breakers} with 1 contacts 22 limit switches 10. The movable contacts of 13 pushbutton switches of each row are connected via windings 17 of auxiliary relays to the passive terminal of an additional power source 16. Fixed contacts, 23 pushbuttons of each, p Yes connected to another terminal of an additional source. 16. The contact groups 24-26 are used for switching. out of chain. The switch works as follows, When you press one of the buttons 1 of any. In a row, the rod 9 moves the reset bar 3, while the locking: contacts 13 and 23 in the power supply circuit (source 16) of the winding 17 of the relay are located. This causes the closure of pins 18 and 19. At the same time, the reset bar 3 completes the double run and reverse. I act when I push the knob to the switch 10, contacts 14 and 15 of the limit switch 10 are closed for a short period of time and turn on the power supply circuit of the winding 11 of the electromagnet of the row in which 1 button was pressed before. For example, when any button 1 of the first button is pressed (the upper one according to the diagram) row, contacts 18 and 19 of the same row close. Further, when pressing any KTU 1 of any hfg row (for example, the last), the voltage of the power source 12 to the winding 11 of the first row electromagnet is fed through a circuit: a minus terminal of a 12k source 12, the short-term closed contacts 14 and 15 of the end switch 10 of the lower row , contacts 14, 22 of the limit switch 10 of the first row, winding I, closed contacts 38, 19 of the first row and the positive terminal of the power supply 12. Contacts 14 and 15 are closed for a short time when you press any button of this row and forward stroke strips ov Thus, the electromagnet is activated only in the row in which the button of the push-button switch was previously turned on and, accordingly, the contacts 18 and .19 of the auxiliary turnip were turned on. The duration of the on state of the power supply circuit of the electromagnet is determined by the time of its operation and the time of return of the pushbutton switch to its original position. When the power supply of the winding 11 of the electromagnet is switched on, its measles 6 acts on the reset bar 3, which releases the previously fixed button I. The latter, under the action of the return spring 2, takes the initial position, opening the contacts 13, 23 and 16, 25. The auxiliary relay circuit with the winding 17 made low current. Due to this, the burning of the contacts 13, 23, as well as the insulation breakdown between contacts 13 and 26, 23 and 25 and between the contacts 13, 23 and the switch body, are eliminated in the proposed multi-switch. The formula isob. reteni. Multiple switch with automatic reset, containing electromagnets with windings and their power source, pushbutton and limit switches, installed in rows, in each row the movable contacts of the pushbutton switches are interconnected, the movable contacts of the end switches of all rows are also interconnected, fixed the closing contacts of the limit switches. all rows are connected to the source: power supply terminal, characterized in that, in order to increase its reliability by increasing the electrical strength, the switch is equipped with an additional low-voltage power source and auxiliary relays, the contacts of which are connected to the power source of electromagnets and the terminals of the windings of electromagnets, the other outputs of which are connected to the fixed opening contacts of limit switches, and the windings of the auxiliary relays are connected to one additional terminal power supply, and the non-tangent contacts of the pushbuttons of all rows are connected to its another clamp. Sources of information, taken into account in the examination I. USSR author's certificate № 427412, cl. H 01 H 13/70, 1972. 24 25 24 25 VV 26 25