JPH0239272Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to a power outage countermeasure technique for a watch equipped with an analog display section and a digital display section.

(Prior art) In clock devices such as time recorders that are equipped with a large pointer-type time display mechanism and a digital display mechanism that always displays the month and day, the pointer-type time display mechanism requires a large driving force. For this reason, while commercial power is required as the driving energy source, the digital display mechanism with low power consumption is backed up by an auxiliary power source such as a battery and continues to display the month and day. However, there was a problem in that the time was not displayed at all, which caused inconvenience to the envoys.
To solve this problem, when the commercial power supply is cut off due to a power outage, etc., the digital display mechanism switches from displaying the month and day to displaying the time, so as not to cause any inconvenience to the user. However, there is still the problem that the user may be drawn to the familiar display format and unconsciously mistake the display on the analog display mechanism for the current time even during a power outage.

(Purpose) In view of these circumstances, the present invention is an analog-digital clock that can switch the time display to the digital display side in the event of a power outage, and at the same time draw the user's attention to the digital display side so that they can recognize the accurate time. The purpose is to provide equipment.

(Structure) That is, the feature of the present invention is that the digital display is switched to a blinking display in the event of a power outage.

Therefore, the details of the present invention will be explained below based on illustrated embodiments.

FIG. 3 shows an embodiment of a time recorder equipped with an analog/digital clock to which the present invention is applied, in which an hour hand 12a, an hour hand 12a, An analog display mechanism 12 consisting of a minute hand 12b and a digital display 13 such as a liquid crystal panel are disposed in the center of the analog display mechanism 12, and are configured to normally operate by receiving power from a commercial power supply.

FIG. 1 shows an embodiment of the drive circuit, which is composed of a power supply section 1, a control section 2, and a power failure detection section 3. It is configured to supply operating power to the control unit 2, the power failure detection circuit 3, the motor driver 4, and the display driver 5 via the secondary battery 61a in the current state. The control unit 2 controls hours, minutes,
Contains a control program that manages the operations of the clock circuit 2a, CPU 2b, and CPU 2b that generate a reference clock signal consisting of a second signal and month/day signals.
Memorizes ROM2c and the time at the start of power outage
It consists of a RAM 2d and a flashing circuit 2e that operates the display driver 5 intermittently in the event of a power outage, and is configured to receive a signal from the power outage detection circuit 3 and output a clock signal to the display driver 5 and motor driver 4. has been done. 14 is a motor driver 4
A pulse motor rotates by a drive signal from
It is connected to the analog display mechanism 12 and a printing wheel (not shown) via a transmission mechanism.

Next, in this embodiment, when a commercial power source is connected to the power supply section 1, the power failure detection circuit 3 outputs an L level signal and commercial power is supplied from the power supply section 1. The clock circuit 2a outputs month/day signals to the display driver 5 and hour/minute/second signals to the motor driver 4. As a result, the display driver 5 causes the digital display 6 to display the month and date in a stationary state, and the motor driver 4 causes the pulse motor 1 to display the month and date in a stationary state.
9, the hour hand 12a and minute hand 12b are rotated, and the analog display mechanism 12 and a type wheel (not shown) are rotated every minute in accordance with the time, thereby displaying the hours and minutes in analog (FIG. 2).

When the time card is inserted at this point, the date and time are printed at predetermined positions on the card using a printing hammer.

In such a state, if the supply of commercial power is cut off due to a power outage, the control section 2 continues to operate by receiving power from the backup secondary battery 1a. On the other hand, due to the interruption of the commercial power supply, the power outage detection circuit 3 inverts its output to H level. Received H level signal
The CPU 2b stores the month, day, hour, minute, and second output from the clock circuit 2a, that is, the time at the start of the power outage, in the RAM 2d, and
The hour, minute, and second signals are output from the flashing circuit 2e to the display driver 5, and the digital display 13
Switch the display from date and time to hours, minutes and seconds,
Display this in a blinking state (). This results in
The user is attracted by the blinking of the digital display 13 and looks at the digital display, thereby accurately knowing the current time and at the same time recognizing that there is a power outage.
During this power outage period, the control unit 2 including the clock circuit 2a
receives power from the backup battery 1a of the power supply unit 1 and continues the clocking operation in the same way as in the case of a power outage,
Digital display 13 shows the current time according to the blinking state.
display().

In such a state, when commercial power is supplied to the device due to recovery from a power outage, etc., the power outage detection circuit 3
is inverted and outputs an L level signal to the control section 2. The CP 2b outputs a pulse signal with a high repetition frequency to the motor driver 4, and also regards this pulse signal as a clock signal and adds it to the power outage start time stored in the RAM 2d. motor 19
In response to this pulse signal with a high repetition frequency, the analog time display mechanism 12 rapidly advances the type wheel (,). Continuing this operation, when the sum of the power outage start time and the pulse signal matches the value of the clock circuit 2a, the output of the fast-forward pulse signal is stopped, and at the same time, the blinking operation of the digital display 13 is stopped. () to switch from hour, minute, and second display to month and day display (). As a result, the displayed time and the day, hour, and minute type wheels of the analog time display mechanism 12 are automatically adjusted to the current time. When the digital display 13 stops blinking, the user recognizes that the power has been restored, that the date and time are displayed on the digital display 13, and that the analog clock is set to the correct time.

In this embodiment, the time when the commercial power supply was cut off is stored in the RAM 2d, but the time from the start of the power outage until the power outage is restored and the time required to adjust the time are different. It goes without saying that the same effect can be obtained by integrating the total value, that is, the time from the time of power outage to the completion of correction, and outputting the number of pulses that match this time.

(Effects) As explained above, according to the present invention, when the supply of commercial power is cut off, the display content of the digital display is switched from displaying the month and day to displaying the hours and minutes, and the display blinks. As a result, it is not only possible to display a power outage without using a special power outage display element, but also to draw the user's attention from the analog display section to the digital display section so that the user can recognize the accurate time. becomes possible.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a device showing an embodiment of the present invention, FIG. 2 is an explanatory diagram showing the operation of the same device,
FIG. 3 is a front view showing the external appearance of an analog-digital clock device to which the present invention is applied. DESCRIPTION OF SYMBOLS 1... Power supply part, 2... Control part, 12... Analog display mechanism, 13... Digital display, 14...
...Pulse motor.

Claims (1)

[Scope of utility model registration request] A clock circuit that generates a clock signal, an analog display mechanism that includes hour and minute hands driven by a motor that rotates in response to the clock signal from the circuit, and a digital display that displays time information in response to the clock signal. Display mechanism, power outage detection circuit that detects commercial power outages,
a control circuit that receives a signal from the power outage detection circuit and normally outputs month and day data, and outputs time data to the digital display element via a blinking display circuit during a power outage; the clock circuit; the digital display element; An analog/digital clock consisting of an auxiliary power supply that supplies power to the blinking display circuit and control circuit.