JPS6135993Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a watch with a timer function.

In recent years, AC frequency signals are used as a reference, and they are divided and counted to obtain time signals such as hours, minutes, seconds, etc., as well as time fast-forward circuits that adjust the time, and buzzer sounds when a preset time is reached. A clock LSI has been developed that has a built-in alarm function circuit that sends a signal to notify the user that the set time has arrived. An example of such a clock LSI is an LSI manufactured by National Semiconductor (USA).
MM5387AA/N (product number) is commercially available. This clock LSI is designed to be effective when used with a radio, but it can also be used solely as a clock or incorporated into other electrical equipment. It is.

The present invention incorporates such a clock LSI into other electrical equipment, such as a desk fan, to add a clock and enable the fan to operate as a timer. By operating from a few minutes to up to 24
This has been improved so that the timer period can be selected arbitrarily between hours.

An embodiment of the present invention will be described in detail below based on the drawings. 1
is the above clock LSI, which includes a time signal generation circuit,
Built-in fast forward circuit for time adjustment, alarm function circuit, time signal output terminals 1 to 21, alarm output terminal 22, alarm off input terminal 23, alarm display terminal 24, time adjustment first and second terminals 25, 26,
Power supply terminals 27, 29, reference frequency signal input terminal 2
8, each has an afternoon display signal output terminal 30. 2 is a time display section using a light emitting diode as a display element, consisting of a 4-digit number, and LSI1
Hour, minute, and time signals are supplied from the time signal output terminals 1 to 21, and the time is displayed. This display section 2
In addition to light emitting diodes, liquid crystal display elements and fluorescent display tubes can also be used as display elements. In this display section 2, numeral 3 is a colon placed between the hours and minutes, which is connected to the power supply Vss via a resistor _R1 , and is always lit. Reference numeral 4 denotes an afternoon display point that lights up when the displayed time is in the afternoon, and it lights up in response to a signal from the afternoon display signal output terminal 30. Reference numeral 5 designates a timer display point that displays this while the timer is operating. 6 is the power supply section,
It includes a power transformer T. The primary side of the power transformer T is connected to 100V AC, and the secondary side outputs a voltage-dropped AC signal, rectified DC voltage, etc. In other words, among this secondary side output, the diode
The DC voltage V _DD (-22V) obtained through D ₁ is
It is applied to the power supply terminal 29 of LSI1. This voltage line will hereinafter be referred to as the power supply _VDD line 7. On the other hand, the ground potential or the used power supply Vss(ov) line 8 is applied to the other power supply terminal 27. Also a diode
The voltage obtained through D ₂ and D ₃ is supplied to the common electrode side of the display section 2. In addition, AC frequency (50/60
Hz) signal is input as a reference frequency signal to terminal ₂₈ via resistor R2. M is a motor that serves as a drive source for the desk fan, and is supplied with an AC power of 100V via a rotation control switch _S0 . 9 and 10 are motor M
The rotation control switch S ₀ is connected between one AC power line 10 and the motor M, and the first switch S ₁ is connected in series with this control switch S ₀ . A second switch _S2 is inserted in parallel with switch _S1 ,
A relay switch is used as the second switch _S2 . The operations of the switches S ₁ and S ₂ will be described later.

Next, the peripheral circuits connected to each terminal of LSI 1 will be explained. _S3 is a continuous/timer changeover switch consisting of a "continuous" terminal 11, a "timer" terminal 12, and a contact piece 13 for switching these terminals, and the "timer" terminal 12 is connected to an alarm display element via a timer switch _S4 and a diode _D4 . 24, the fixed point side of the contact piece 13 is connected to the power supply Vss line 8, and the "continuous" terminal 11 is connected to the first and second fast forward switches S ₅ and S ₆ for time adjustment via a diode D ₅ , respectively. ing. The switching operation of the contact piece 13 is performed by interlocking the first switch _S1 , so that the contact piece 13 switches to the "continuous" terminal 1.
1, this first switch _S1 is closed, and when it is in contact with the "timer" terminal 11, it is opened. When the first switch _S1 is in the closed state, the motor M is stopped or continuously driven by the operation of the control switch _S0 , and when the first switch S1 is in the open state, the motor M is operated via the first switch _S1 . The power supply to M is cut off. _S4 is a timer switch, which inputs the power supply voltage Vss to the alarm display terminal 24 via the continuous/timer changeover switch _S3 and the diode _D4 , and displays the alarm time on the time display section 2.

_D6 is a diode connected in anti-parallel between the power supply _VDD line 7 and the cathode of diode _D4 ,
C ₁ is a capacitor connected in parallel with timer switch S ₄ and diode D ₇ , S ₅ and S ₆ are first and second fast-forward switches, respectively, and one end is connected to timer switch S through diode D ₈ that is commonly connected. _Four
and connected to the connection point of diode _D4 . The other end of the first fast forward switch _S5 is connected to the power supply V _D via the correction first terminal 25 of LSI 1 and the diode _D9 .
Similarly, the other end of the second fast forward switch S6 is connected to _{the D} line 7, and the other end of the second fast forward switch _S6 is connected to the correction second terminal 26 of LSI1.
and the power supply V _DD line 7 through diode D ₁₀
are connected to each. Here, the first fast forward switch _S5 is a so-called fast forward switch (FAST).
The second fast-forward switch _S6 is called a slow switch, and is a switch that fast-forwards time at a rate of one hour per second.
It is a switch that fast-forwards time at a rate of 2 minutes per second. _C2 is a capacitor for preventing chattering connected in parallel with the second fast forward switch _S6 .

FF is an RS flip-flop consisting of two NOR gates, the set S input terminal of which is connected to the LSI alarm output terminal 22 via an inverter 14 and a resistor _R3 , and to the "continuous" terminal ₁₁ of the continuous/timer changeover switch _S3 via a resistor R4.
It is connected to the junction of the timer switch _S4 and the diode _D4 through a resistor _R5 and a diode _D11 . _Tr1 is a first switching transistor, the base of which is connected to the set output Q of the flip-flop FF through a resistor _R6 , and its collector is connected to the power supply Vss line 8 through a resistor _R7 and a relay Re.
The base of _Tr2 is connected to the collector of the first switching transistor Tr1 via a resistor _R8 , the emitter is connected to the power supply _Vss line ₈ , and the collector is connected to the timer display point 5 of the display unit 2 via a resistor _R9 . _D12 is a flywheel diode inserted in parallel with the relay Re, and _R10 is a resistor inserted between the base and emitter of the first transistor _Tr1 .

The relay Re operates the second switch _S2 , and is configured to close the second switch _S2 when the relay Re is activated. C ₃ and C ₄ are capacitors inserted between the input sides of the inverters 14 and 15 and the power supply V _DD line 7 for the purpose of noise cancellation, and also between the input power supply of the flip-flop FF and
Capacitor installed between power supply V _DD line 7
_C5 protects the gate from noise voltages. Resistors R ₁₁ and R ₁₂ are power supply voltage dividing resistors, and the divided power supply voltage is stabilized by capacitor C ₅ and is integrated into a flip-flop integrated circuit.
Supplied as FF power. R ₁₃ and R ₁₄ are resistors for obtaining a predetermined voltage to operate the flip-flop FF normally, and R ₁₅ and R ₁₆ are similarly dividing resistors for stably operating the flip-flop.

Next, the operation of such a configuration will be explained.

(b) For continuous operation: Continuous/timer selector switch _S3 is set to the "continuous" side. Therefore, the first switch _S1 is in the on state, and since AC power is supplied to the motor M via the control switch _S0 , the user can turn on the control switch _S0.
The fan can be driven continuously or stopped at will. At this time, the power supply Vss signal is connected to the "continuous" terminal ₁₁ of the continuous/timer selector switch S3, and the resistor
It is applied via R ₄ and inverter 14 to the flip-flop's set input terminal. In other words, the signal Vss at “H” level is connected to inverter 1.
4, it is inverted to "L" level and applied to the set input terminal, so the output Q of flip-flop FF becomes "L" level, the first transistor _Tr1 is off, and therefore the relay Re does not operate and the second
Switch _S2 remains open.

At the same time, since the second transistor Tr ₂ is also off, the timer display point 5 also does not light up.

On the other hand, the time display section 2 receives the time signal from the LSI 1 and displays hours and minutes. This display time can be corrected using the first and second fast forward switches _S5 ,
This is done by operating _S6 . For example, when the first fast-forward switch _S5 is pressed, the signal from the power supply voltage Vss line 8 is input to the correction first terminal 25 via the diode _D5 of the continuous/timer changeover switch _S3 and the first fast-forward switch _S5 . do. With this signal input,
The displayed time advances at a rate of 1 hour per second, and when the second fast forward switch _S6 is pressed, the displayed time advances at a rate of 2 minutes per second. Therefore, the time can be quickly adjusted by operating the first fast forward switch _S5 to adjust the time in units of hours, and by operating the second fast forward switch _S6 to adjust the time in minutes. In this state, even if the timer switch _S4 is operated, since the timer side of the continuous/timer changeover switch _S3 is in an open state, it will not operate and no alarm will be displayed.

(b) When operating the timer: Continuous/timer selector switch _S3 is set to the "timer" side. This causes the first switch S ₁
is off. Subsequently, when the timer switch _S4 is closed, the power supply voltage Vss passes through the "timer" terminal 12 of the continuous/timer changeover switch _S3 and is input to the alarm display terminal ₂₄ via the timer switch S4. Therefore, the alarm time is displayed on the time display section 2 instead of the normal time display. At the same time, the signal Vss is applied via the diode D ₁₁ , the resistor R ₅ and the inverter 15 to the reset input terminal R of the flip-flop FF.

That is, the output of the inverter 15 changes from "H" to "L" level, and the reset input of the flip-flop FF becomes an "H" level signal. On the other hand, since the input of the inverter 14 is at the "L" level, the flip-flop FF set input terminal S is at the "H" level, so the flip-flop FF changes to the set state and its output Q becomes an "H" level signal.

Therefore, this signal makes the first transistor Tr ₁ conductive, activates the relay Re, and then activates the second switch.
If _S2 is closed and the control switch _S0 is set to the on side, the motor M starts driving.

As the first transistor Tr ₁ becomes conductive, the second transistor Tr ₂ also becomes conductive, and the power supply voltage Vss is supplied to the timer display point 5 of the display section 2 through the second transistor Tr ₂ to turn it on. If a desired time is set by operating the first or second fast-forward switch S ₅ or S ₆ in this state, this set time becomes the timer-off time. This timer time can be set arbitrarily within the range of several minutes or 24 hours after the current time, and the operation and operation of switches S ₅ and S ₆ are the same as described in the case of time adjustment. . After setting the timer time in this manner, the display section 2 returns to the original time display by opening the timer switch _S4 , the electric fan is driven, and the timer display point 5 continues to light up. Then, when the timer setting time arrives, an alarm signal of "H" level is output from the alarm output terminal 22, and this signal is inverted to "L" level by the inverter 14 and sent to the set input terminal of the flip-flop FF. join. At this time, the reset input terminal of flip-flop FF is at the "H" level, so this flip-flop FF changes to the reset state, and the output Q is
It becomes "L" level.

Therefore, the first and second transistors Tr ₁ and Tr ₂ are turned off, the power supply to the relay Re and the timer display point 5 is cut off, and the second switch S ₂ is therefore opened, the electric fan is stopped, and the timer display is Light 5 also goes out. Thus, the timer operation ends. Note that while the “H” level signal is emitted from the alarm output terminal 22, the alarm off terminal 23 is connected to the power supply.
Since the Vss signal is applied and the alarm output signal is in the operating state, this alarm output signal is output immediately after its output (approximately 7 msec
(after) changes to “L” level. Note that while the timer is running, the normal time is displayed, so if you want to know the remaining time on the timer, press the timer switch S ₄ .
All you have to do is press , and the alarm time will be displayed on the display section 2.

In this embodiment, the timer switch _S4
via the first or second fast forward switch S ₅ , S ₆
However, for example, when timer switch _S4 and first fast-forward switch _S5 are closed and timer switch _S4 is momentarily opened, the current time is 1. There is a risk of rapid forwarding due to the operation of the fast forward switch _S5 . Capacitor _C1 prevents this problem from occurring.

That is, normally this capacitor _C1 is connected to the supply voltage
Vss is applied through the "timer" terminal 12 of the continuous/timer selector switch _S3 , which is in the charging state. When the timer switch _S4 is closed and the alarm time is displayed, this charging current is discharged through the timer switch _S4 and the diode _D4 , but the timer switch _S4 is momentarily opened. Then, a charging current flows to the alarm display terminal 24 side of the capacitor C ₁ from the voltage Vss, and the current flowing into the terminal 24 is maintained. The diode _D4 prevents this charging current from flowing toward the timer switch _S4 . This prevents the malfunction of fast-forwarding the current time due to momentary opening of the timer switch _S4 . Note that when the timer switch _S4 is turned off, the charging current of the capacitor _C1 flows into the alarm output display terminal 24, and the capacitor
C ₁ capacity and LSI connected to alarm display terminal 24
Since the input signal is held for a certain period of time (0.5 seconds in this case) determined by the value of the internal impedance, the alarm time display is held for 0.5 seconds even after the timer switch _S4 is opened.

As is clear from the above explanation, the timer function watch of the present invention is equipped with a timer switch on the alarm display signal input terminal normally used for the alarm function, and the alarm setting time set by operating the switch is set as the timer end time. You can get up to 24 hours of timer time from it.

[Brief explanation of drawings]

The figure is a circuit diagram of one embodiment of the present invention. 1... Clock LSI, 2... Time display section, 6... Power supply section, M... Motor, FF... Flip-flop, S ₃
...Continuous/timer changeover switch, _S4 ...Timer switch, _S5 ...1st fast-forward switch, _S6 ...2nd fast-forward switch.

Claims (1)

[Scope of utility model registration request] Clock LSI with built-in alarm function circuit, time signal generation circuit, fast forward circuit for time correction, etc.
a time display section that receives a time signal output from the time signal generation circuit and displays the time; and a time display section that displays the alarm time on the time display section when the alarm function circuit is operated to operate the alarm function circuit; A switch means that can set a predetermined alarm time by the operation of a fast-forwarding circuit, and a switch means that detects the operation of this switch means and starts driving a load electrical equipment in which the clock having the above-mentioned structure is integrated, and when the above-mentioned alarm time arrives. A clock with a timer function, which is equipped with a control circuit that detects and stops the load electrical equipment.