JPS6020077Y2 - timer - Google Patents

Description

[Detailed description of the invention] This device is connected between the power input terminal of electronic equipment such as television receivers and audio equipment and the commercial power supply terminal of ACIQQV, and turns on power to the electronic equipment at the desired set time. ,'' to turn on or turn off electronic devices at a desired time is known.

When using this timer to set the time to turn on or turn off the power of an electronic device, the previously set reservation time is changed, but the new time you are trying to set is different from the previously set time. If the current time matches the current time when changing the time, a so-called timer operation will be performed to control the power on to the electronic devices, causing the electronic devices to operate or become inactive. Well, that's really inconvenient.

For this reason, as shown in Figure 1, switches 1 and 2 are provided to switch between the current time mode and the scheduled time mode.When switch 1 is pressed, the timer enters the current time mode and operates like a normal watch. When the display unit 3 displays the current time and the time set for the reservation is reached, the timer operates to control the power on to the electronic equipment, and when the switch 2 is pressed, the timer is set to the reservation time mode. Then, the reservation setting time is displayed on the display section 3, and while looking at the display, operate the time advance switch 4゜5.6 to set the display to the desired time, and when changing the display. Another idea was to prevent the timer from operating even when the display matches the current time.

FIG. 2 shows an example of such a timer, and 10 is a current time setting circuit, which is composed of an oscillator 11 and counters 12 to 17 as frequency dividers. A signal S8 whose one period corresponds to 1 second is obtained from the signal S8, which is supplied to the counter 13.
from which one cycle corresponds to one minute.
M is obtained and supplied to the counter 14, thereby obtaining a signal SjOM whose one period corresponds to 10 minutes,
This is further supplied to the counter 15, from which a signal SH whose one cycle corresponds to one hour is obtained, and this is supplied to the counter 16, from which a signal SH whose one cycle corresponds to one full bloom is obtained. , this is further supplied to the frequency divider 17, from which the state of rlJ and the state of "0" are inverted every full bloom. Therefore, morning (AM) becomes afternoon (PM).
A signal PAP indicating whether

Further, code signals PH0P1oM and PM are obtained from the count values of the counters 16 and 15.14, respectively indicating what time it is, what 10x what minute, and these code signals PH9P10MPM and the signal PA2 from the counter 17.
are respectively supplied to one input terminal of the current time/scheduled time switching circuit 20, and are respectively supplied to one input terminal of the coincidence detection circuit 30.

40 is a reservation time memory circuit, and counters 41, 42, 43
, 44, a code signal TM indicating how many minutes it is from the counter 41, a code signal T1oM indicating how many 10 minutes it is from the counter 42, and a code signal TH indicating what time it is from the counter 43. However, a signal TAP indicating whether it is morning or afternoon is supplied from the counter 44' to the other input terminal of the switching circuit 20 and to the other input terminal of the coincidence detection circuit 30, respectively.

50 is a time feed signal forming circuit, and a one minute feed switch 4.
It has a 10-minute advance switch 5, a 1-hour advance switch 6,
1 each time the 1 minute feed switch 4 is turned on.
The minute feed pulse CM is one 10 minute feed pulse C every time the 0 minute feed switch 5 is turned on, and the one hour feed pulse C is one every time the hour feed switch 6 is turned on. Pulses CH are obtained from the time feed signal generation circuit 51, and these feed pulses CM, C1oM, CH
is supplied to the switching circuit 52.

Note that 7 is an erroneous operation prevention switch, and when this switch 7 is off, no sending pulse is obtained even if switches 4 to 6 are turned on.

Therefore, when obtaining a time advance signal, be sure to use switch 7.
Turn on switches 4 to 6 while turning on.

Reference numeral 90 denotes a mode switching signal forming circuit, which obtains mode switching signals SA and SI3 according to the states of switches 1 and 2 and the state of erroneous operation prevention switch 7, and the signal SA is supplied to the switching circuit and 52 as the switching signal. The signal S8 is also supplied to the coincidence detection circuit 30 to control its activation or inactivation, while the signal S8 is supplied to the oscillator 11 of the current time setting circuit 10.
and its oscillation drive is controlled.

That is, when the switch 1 is pressed, the signals SA and S8 from the mode switching signal forming circuit 90 are both "1", and at this time, the switching circuit 20 is set to the input terminal P side, and the switching circuit 52 is set to the output terminal P side. The oscillator 11 oscillates, the coincidence detection circuit 30 becomes active, and the timer enters the current time mode.

That is, the current time information P M t PIOM 9 P H9 and PAP, which change every moment, are obtained from the current time setting circuit 10 , and this is sent to the display device 7 via the display drive circuit 60 .
0 and the current time is displayed on the display section 3 as shown in FIG.

Further, at this time, the coincidence detection circuit 30 is activated by the signal SA, and the reservation time information TMg TloMt T) I and TAP from the reservation time storage circuit 40 and the current time information P
M, P1oM, PH, and PAP are compared, and when they match, a match detection output is obtained, which is supplied to the relay drive circuit 31, which turns on the relay switch 32, and drives the electronic device, e.g. The power is turned on to the television receiver 80 at the scheduled time,
This is turned on.

That is, a timer operation is performed. If the current time displayed on the display unit 3 is different from the correct time in the current time mode, the correction is made as follows.

That is, when the erroneous operation prevention switch 7 is pressed and turned on, the signal SB changes from "1" to "0", the oscillation of the oscillator 11 of the current time setting circuit 10 stops, and while the switch 7 is pressed, the feed switch is turned on. If you press any one of switches 4 to 6, for example 1 minute advance switch 4, the minute display (3M) on display section 3 will advance by the number of times you press this switch, and from now on, by operating switches 4 to 6, the current time The display is corrected to match the correct time.

Next, when switch 2 is pressed, mode switching signal forming circuit 9
The signal SA from 0 becomes "0", while the signal S8 becomes "1".
” remains.

At this time, the switching circuit 20 is switched to the input terminal T side, the switching circuit 52 is switched to the output terminal T side, the coincidence detection circuit 30 is inactive, and the timer is in the reservation mode.

That is, the stored reservation time information is obtained from the reservation time storage circuit 40 and is supplied to the display device 70 via the switching circuit 20 and the display drive circuit 60, so that the reservation time is displayed on the display section 3.

When setting a new reservation time, the operator presses switch 7 while viewing this display and then presses switches 4 to 6 as appropriate to turn them on.

That is, if switch 4 is pressed three times while switch 7 is pressed, the time will be adjusted to three minutes ahead of the previously set time, and thereafter the desired time will be set by operating switches 4 to 6 in the same manner. .

In this case, even if the time coincides with the current time when the correction setting is made, the coincidence detection circuit 30 is in an inactive state, so no coincidence detection output is obtained, and no timer operation is performed. The inconveniences mentioned above will disappear.

However, when switching the mode using switches 1 and 2 in this way, after setting the reservation time with switch 2 pressed, switch 1 is pressed to switch from reservation mode to current time mode. If you forget to set the timer, the coincidence detection circuit 30 will not operate, causing the inconvenience that the timer will not operate even after the set time.

In view of this point, the present invention is designed to eliminate the above-mentioned disadvantages with a simple configuration.

The present invention is a modification of the mode switching signal forming circuit 90. Hereinafter, an example of the mode switching signal forming circuit 90 for a timer according to the present invention will be explained with reference to FIG.

That is, in this example, two-pole, double-throw slide switches are used as the mode changeover switches 1 and 2, and have six contacts a, by C, d, e, and f, and normally contacts a and b. and contacts d and e are connected respectively, and when the switch is pressed, contact C and contacts e and f are connected respectively, and when one switch is pressed, the other is normally connected. It returns to the switching position.

The contact e of the switch 1 is grounded, the contact f is connected to the base of a transistor 92 via a resistor 91, the emitter of this transistor 92 is grounded, and the collector of this transistor 92 is connected to a positive direct current via a resistor 93. It is connected to a power supply terminal from which voltage +Vcc can be obtained, and an output terminal is led out from this collector via a resistor 94.
As a result, mode switching signal SA is taken out.

The other contacts a, by C and d of the switch 1 are free ends.

Further, the contact a of the switch 2 is grounded, and the contact a is connected to the base of the transistor 96 via the diode 95.
The emitter of this transistor 96 is grounded, the collector is connected to the power supply terminal via a resistor 97, and is also connected to the contact f of the switch 1 and the connection point A of the resistor 91, and when the contact is made, the connection point B of the diode 95 is It is grounded through a capacitor 98, and this connection point is connected to the connection point between switch 7 and switches 4 to 6 through a diode 99. Contact C is connected to the power supply terminal through a resistor 100, and contact d. is connected to the connection point between diode 99 and switch 7, contact e is connected to the power supply terminal via resistor 101, and an output terminal is led out from the connection point between resistor 101 and contact e via resistor 102. An output signal S8 is obtained, and the contact point f is assumed to be the roadside.

Therefore, when switch 1 is pressed and contacts C and contacts e and f are connected as shown in the figure, connection point A
is grounded via the switch 1, the potential EA at the connection point A (FIG. 4A) becomes "0", so the transistor 92 is turned off, and therefore the signal SA (FIG. 4C) becomes r.
It becomes lJ.

On the other hand, when contacts e and f of switch 2 are connected but switch 7 is off, signal SB (Fig. 4D) is "1".
”.

That is, when the signals SA and SB are both "1", the timer is in the current time mode, and since the signal SA is "1", the coincidence detection circuit 30 is activated.

Then, when switch 7 is turned on with switch 1 pressed down, contact e of switch 2 is grounded, and signal S
B becomes "0", and as mentioned above, the current time setting circuit 10
The oscillator 11 stops oscillating, the timer enters the current time correction mode, and by operating switches 4 to 6,
The current time will be corrected.

If the switch 7 is turned off in this state, the signal SB becomes "1" again and the timer enters the current time mode.

Next, when switch 2 is pressed, switches 1 and 2 will be in the opposite state to that shown in the figure, i.e. switch 1 will have contacts a and b and contact d.
When the switch 2 is brought into contact so that C and e are connected, C, e and f are connected.

Then, since the contact f of the switch 1 is opened, the base current is supplied from the power supply terminal to the transistor 92.
This turns on, the signal SA becomes rOJ, the coincidence detection circuit 30 becomes inactive, and the timer enters the reservation mode.

In this state, when the reserved time is not changed, the capacitor 98 is connected to the power supply terminal via the resistor 100 and switch 2.
A charging current flows through the node B, and the potential EB at the connection point B (Fig. 4B) gradually increases with a time constant determined by the resistor 100 and the capacitor 98, and when it exceeds a certain voltage Ea, the voltage is applied to the base of the transistor 96 through the diode 95. A current flows and turns on, and the potential at the connection point A becomes almost the ground potential, turning off the transistor 92. Therefore, the signal SA becomes "1" even though the switch 2 is pressed. Automatically changes from reservation mode to current time mode.

Next, after pressing the switch 2, when changing the reserved time, the situation will be as shown in FIG.

That is, when switch 7 is turned on after pressing switch 2, from the point at which the voltage Ea at connection point B becomes higher than the forward bias voltage ED of diode 99, diode 99 becomes conductive and voltage EB becomes The voltage ED becomes constant, the transistor 96 remains off and the signal SA becomes rOJ.
maintain the condition.

In this state, the reservation time is set by operating switches 4 to 6.

After that, when switch 7 is turned off, voltage EB at connection point B rises again, and when it exceeds voltage ET, transistor 9
3 is turned on and the transistor 92 is turned off, the signal SA changes from "0" to "1", changing to the current time mode, and the coincidence detection circuit 30 is activated.

That is, the timer automatically switches from the reservation mode to the current time mode after a certain period of time after the switch 7 is turned off.

As described above, according to the present invention, after pressing the mode changeover switch 2 to set the timer to the reservation mode, the switch 1
Even if you forget to press to return to current time mode, the timer will automatically change to current time mode, so there is no chance that the timer will not work at the scheduled time.

Moreover, in the case of the example shown in the figure, by turning on switch 7, it is possible to prevent the mode from changing from the reservation mode to the current time mode while setting the reservation time, so that the timer is turned on while the reservation time is being set. There is no such thing as ending up in current time mode.

Note that in the above example, the mode signal SA causes the coincidence detection circuit 30 to
Although the drive of the coincidence detection circuit 30 is controlled, the coincidence detection circuit 30
A gate circuit may be provided on the output side of the gate circuit, and its on/off may be controlled by the signal S^.

In addition, only one mode changeover switch is required so that when pressed, the mode is set to the reservation mode, and when in other states, the mode is set to the current time mode.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an overview of an example of a timer, Fig. 2 is a system diagram of an example of a timer, Fig. 3 is a circuit diagram of the main parts of the timer according to the present invention, and Figs. 4 and 5 are explanations thereof. FIG. 1 and 2 are mode changeover switches, 4, 5 and 6 are time feed switches, 7 is an erroneous operation prevention switch, 10 is a current time setting circuit, 30 is a coincidence detection circuit, 40 is a reserved time storage circuit, 50 is a time feed circuit, 90 is a mode switching signal forming circuit.

Claims (1)

[Scope of utility model registration request] A coincidence detection circuit that compares the current time information and the reserved time information and obtains a control signal when they match; a mode changeover switch; and a mode changeover switch that obtains a current time mode signal when the mode changeover switch is in the - position. , and a mode switching signal forming circuit from which a reservation mode signal is obtained when the mode switching signal forming circuit is in another switching position, and when the current time mode signal is obtained from the mode switching signal forming circuit, it operates as a clock and also receives a control signal from the coincidence detection circuit. is obtained, and the reservation time is set when the reservation mode signal is obtained from the mode switching signal forming circuit, and the control signal is not obtained from the coincidence detection circuit; When the changeover switch is set to the switching position of the above function, after the reservation mode signal is obtained from the mode switching signal forming circuit, the current time mode signal is obtained from the mode switching signal forming circuit after a predetermined time. timer.