SU1401646A1 - Device for automatic switchoff of television receiver - Google Patents

Abstract

The invention relates to a television technique. The purpose of the invention is to reduce energy consumption while simplifying the device. The device contains a relay 1, made polarized, two-position, two-stable, with two control windings 2 and 3, contact group 4, two contact groups 5 and 6, a button 7 of the on / off switch of the TV, made two-position without self-return , integrator (s) 8 and key 9. When a television signal (TC) hits, the control voltage Uunp takes on a high level voltage value. After a certain time required to prevent the device from tripping due to an accidental disappearance of the vehicle, the rising voltage at the output of AND 8 reaches a threshold value at which key 9 opens (closes). In the control winding 3, a current appears that causes the relay 1 to trip. The power supply circuit of the television is open. When the current becomes equal to zero, the key 9 is closed again (opened). It should be noted that in this state the relay 1 is de-energized — the device, in the absence of a TC, does not consume electricity from the DC voltage source + E. 1 Il. o (l

Description

FIELD: engineering.

television and can be used

in the receiving television equipment for its automatic disconnection from the mains

The purpose of the invention is to reduce power consumption while simplifying the device.

The drawing shows a structural electrical circuit of the device for automatically turning off the TV

The device automatically turns off the TV: the relay contains 1,: full polarized, two-way: two-stable, two-position dyon with two control windings 2 3, contact: group 49, two contact groups 5 and 6 and the switch 7 on the TV off switch: two-position without self-return ,, integrator 8 and key I: The device works as follows: ..paacfM

In the initial state, the power supply circuit of the television is open. Let j for example, the moving contact of the second contact group 6 of the switch is in the upper position, the moving contact of the first contact group 5 of the switch in the left, and the moving contact of the contact group of relay 1 in the lower position. Key 9 is closed (open. Control voltage U ,,, | p is zero.

: The TV is turned on using the non-self-reset switch-off button 7, which moves the moving contact of the second contact group 6 to the bottom and the moving contact of the first contact group 5 to the right position. In this case, the TV is connected to the power supply. After some time, the required warm-up day of the TV, ya key 9 through the integrator 8 receives a control voltage. Iunp

In the presence of a television signal, the control voltage is low, through the integrator 8, a key 9 is supplied.

When the body-wave signal disappears, the control voltage does not accept the value of a high voltage level. After some time. Necessary to prevent the device from tripping up. Disabling the accidental loss of a television signal, increasing at the output

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integrator 8, the voltage reaches a threshold value at which key 9 is opened (closed). At the same time, a current flows through the control winding 3 of the relay 1, which causes the relay 1 to operate: the moving contact of the contact group 4 of the relay 1 moves to the second (upper according to the diagram) stable position. TV power circuit is open.

Since the TV is de-energized, after some time the control voltage Uunp becomes zero. The key 9 is closed again (opened). In this state, relay 1 is de-energized — the device, when there is no television signal, does not consume electricity from the DC voltage source -f-E, the device returns to its original state; wherein the movable contacts of the contact groups 4.5 and 6 of the switch and the relay 1 are in a second, different from the initial, stable position. The television is ready for the next power-up by pressing the button 7 of the on / off switch of the TV again. The next shutdown is performed by switching the relay 1 by means of the control winding 2,

Turn off the TV at any time, regardless of the presence of a television signal and the mode of operation of the device, can be repeated, after switching on, by pressing the button 7c

Claims (1)

Invention Formula A device for automatically turning off the TV, which contains a switch for turning on and off the TV, an integrator whose input is a control signal input and an output connected to a key control input, and a relay that, in order to reduce electrical energy consumption, the relay is field , two-position, two-stable, the first terminals of the two control windings of which are combined and are the input signal of a DC voltage, and the second terminals of the control windings are connected to the corresponding conductive fixed contacts of the first contact group, the start switch - 4 vy31401646 Turning the TV on, which is the input of the mains power supply, is two-position, without self-resetting, fixed contacts of the second, moving contact of the first contact of the contact group of the switching group of the on-off-TV switch-off-TV connected to each other with the corresponding fixed key with a common bus, movable contact contacts of the relay, the movable terminal of the second contact group of the switch-cycle of which is the output of the switch-on and switch-off switch izoravogo TV power.