JPS6112228B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a time adjustment device for a hand-type electronic timepiece that rotates hands by rotation of a step motor and displays hours and minutes on the hands.

Generally, in a digital display type electronic watch, when setting the time, if the time adjustment switch is operated in accordance with the time signal, if the content of the second counter is less than 30 seconds when the switch is operated,
By clearing the contents of the seconds counter, the advance within 30 seconds is corrected, and when the contents of the seconds counter are over 30 seconds, by clearing the contents of the seconds counter and adding 1 to the contents of the minute counter, Delays within 30 seconds are corrected, the so-called ±30
A second correction has been made.

By the way, in a three-hand electronic watch that displays the time by rotating the second, minute, and hour hands by the rotation of a step motor, a second counter is provided to count the position of the second hand, and a time adjustment switch is installed. When operated, if the contents of the second counter are less than 30 seconds, the advance can be corrected by stopping the second hand for a certain period of time, and when the second counter is more than 30 seconds, the second hand can be fast forwarded to the 0 second position. It is considered.

However, among two-hand electronic watches that only have a minute hand and an hour hand, there is no one that can adjust the time down to the second. In particular, in a two-hand watch that is driven by multiple steps and moves by the minute, it is necessary to determine and correct how many steps the minute hand should be stopped for, or how many steps it should be fast forwarded, depending on the amount of error in the seconds. This makes the configuration complicated, and there are no commercially available products that allow corrections to be made in seconds.

This invention was made based on the above-mentioned circumstances, and its purpose is to set the minute hand to n (n is 3
An object of the present invention is to provide a time adjustment device for a pointer-type electronic timepiece, which is capable of adjusting seconds such as ±30 seconds with a simple configuration in a two-hand pointer-type electronic watch that moves in one-minute steps (odd numbers). .

Hereinafter, the present invention will be specifically described based on an embodiment shown in the drawings. Figure 1 shows a digital display function to which this invention is applied, and a minute hand with a three-way display.
(n=3) This is a circuit configuration diagram of a two-hand pointer type electronic timepiece in which the minute hand moves by one step every 20 seconds by being driven in steps. Reference numeral 1 is an oscillation circuit that generates and outputs a reference clock signal;
2 is the reference clock signal of 1P (pulse)/1S.
This is a frequency dividing circuit that divides the frequency into (seconds) signals. Said
The 1P/1S signal is given to a sexagesimal second counter 3. The second counter 3 includes a 60/n-base, that is, a 20-base counter 4a that counts the 1P/1S signal, and an n-base, that is, a 20-base counter that counts the carry signal (20 seconds signal) output from the 20-base counter 4a. It is constituted by a ternary counter 4b. Carry signal (1 minute signal) output from this ternary counter 4b
is given to a minute counter 5 which obtains minute information and is counted. The carry signal (1 hour signal) output from the minute counter 5 is used by the hour counter 6 to obtain hour information.
is given to and counted. The contents of the 2decimal counter 4a and the ternary counter 4b are provided to the decoder driver 7, and the contents of the minute counter 5 and hour counter 6 are provided to the corresponding decoder drivers 8 and 9, respectively. After decoding the input information, each of these decoder/drivers 7 to 9 converts and outputs a display drive signal to drive the digital display section 10 constituted by a liquid crystal display device.

The 20-second signal output from the 20-decimal counter 4a is applied to the reset terminal R of the SR type flip-flop 11, and the AND gate to which the side output signal (reset signal) of this flip-flop 11 is input as a gate control signal. given to 12. Note that the flip-flop 11 is
It is designed to be reset in synchronization with the falling edge of the 20 second signal. The 20-second one-shot pulse signal output from the AND gate 12 is applied to the T input terminal of a binary flip-flop (trigger flip-flop) 14 via an OR gate 13, inverting its output state and An AND gate 15 to which the Q-side output signal of the flip-flop 14 is input, and an AND gate 16 to which the Q-side output signal of the flip-flop 14 is input.
are given to each. Each of these AND gates 15,
From the flip-flop 16, pulse signals are alternately output every time the output state of the flip-flop 14 is inverted. The pulse signal output from the AND gate 15 is applied via the inverter 17 to one end of a coil 18a constituting a non-reversible step motor, and the pulse signal output from the AND gate 16 is applied to the inverter 19. through the coil 18a
is applied to the other end of When a pulse voltage is applied to the coil 18a, the two-pole permanent magnet rotor 18b constituting the step motor is rotated by one magnetic pole pitch, and by the next pulse voltage, the two-pole permanent magnet rotor 18b is rotated by one magnetic pole pitch. The rotor 18b is rotated, and by repeating this operation, the rotor 18b is rotationally driven in steps. In addition, the rotor 18
The rotation of b is transmitted to a pointer (not shown), which moves the minute hand.
Drives one step every 20 seconds. Therefore, the minute hand is driven in three steps to advance one minute.

Next, the configuration of the time adjustment means will be explained.
The contents of the 2decimal counter 4a and the ternary counter 4b are given to the corresponding decoders 20 and 21,
decoded respectively. That is, the decoder 20
Is the content of 2decimal counter 4a less than 60/2n seconds?
A detection means that detects whether 60/2n seconds or more
When the time is less than a second, that is, from 0 to 9 seconds, the signal a is output, and when the time is more than 60/2n seconds, that is, from 10 to 19 seconds, the signal b is output, and the corresponding AND gate 2
2 and 23 as gate control signals, respectively. Further, when the content of the ternary counter 4b is "0", that is, the content of the second counter 3 is 0~
At 19 seconds, signal c is output and AND gate 24
is given as a gate control signal, and when it is "1",
That is, when the content of the second counter 3 is between 20 and 39 seconds, the signal d is outputted and given to the AND gates 22 and 23 as gate control signals, and further, the signal d is output as "2".
That is, when the contents of the second counter 3 are between 40 and 59 seconds, the signal e is outputted and given to the AND gate 25 as a gate control signal. Each of these AND gates 22-25 is supplied with a pulse signal outputted from a one-shot circuit 26 each time a correction switch S for making a correction of ±30 seconds is operated. and,
The pulse signals output from the AND gates 22 and 24 are given to the OR gate 27, and the pulse signals output from the AND gates 23 and 25 are
It is given to the OR gate 27 via the OR gate 28. The output signal of this OR gate 27 is sent to the reset terminal R of the 2decimal counter 4a and the ternary counter 4b.
and clear their contents. On the other hand, the output signal of the OR gate 28 is applied to the +1 input terminal of the minute counter 5, and its contents are incremented by +1.
Further, the pulse signal output from the AND gate 22 is applied to the set terminal S of the SR type flip-flop 11 to set it. Further, the pulse signal output from the AND gate 23 is given to a two-pulse generation circuit 29, which generates and outputs two pulse signals. The two pulse signals output from the two-pulse generating circuit 29 are applied to the OR gate 13. The OR gate 13 is also given a pulse signal output from the AND gate 25.

As shown in Figure 2, the electronic watch configured as described above is designed so that the current time displayed on the hand, for example 8:14:30, is digitally displayed within the display area of the hand display. It is composed of Further, the digital display section 10 has 60 dot display bodies D arranged around the outer periphery of the pointer display section, and is adapted to display cumulative seconds information (30 seconds).

When making a correction of ±30 seconds, the correction switch S is operated in accordance with the time signal. At this time, if the content of the second counter 3 is within the range of 0 to 19 seconds, the content of the ternary counter 4b is (n-1)/2
= less than 1, that is, "0", and the decoder 2
1 is outputting signal c, and the AND gate 24, which is the first correction control means, is deregulated. Therefore, in this case, when the correction switch S is operated, the pulse signal from the one-shot circuit 26 is output from the AND gate 24, and is applied to the decimal counter 4a and the ternary counter 4b via the OR gate 27. Clear their contents.
As a result, the advance of the second counter 3 from 0 to 19 is corrected. In this case, the pointer (minute hand) is at the 00 second position and remains at that position until 20 seconds have elapsed after the correction switch S was operated.

Next, if the content of the second counter 3 is within the range of 20 to 29 seconds, the content of the ternary counter 4b is (n
-1)/2=1, the decoder 21 outputs the signal a, and the decoder 20 outputs the signal d, and the AND gate of the second correction control means consisting of the AND gates 22 and 12 and the flip-flop 11 In this case, when the correction switch S is operated, the pulse signal from the one shot circuit 26 is outputted from the AND gate 22. As a result, the contents of the 20-decimal counter 4a and the 3-digit counter 4b are cleared, so that the advance of the second counter 3 from 20 to 29 seconds is corrected. At the same time, the SR type flip-flop 11
is set, the AND gate 12 is closed. However, the SR type flip-flop 11 is
Since it is reset in synchronization with the fall of the 20-second signal from the 20-decimal counter 4a, the 20-decimal counter 4 is reset when 20 seconds have elapsed since the correction switch S was operated.
Even if a 20 second signal is output from a, a pulse signal cannot be output from the AND gate 12.
Then, when the content of the second counter 3 reaches 40 seconds, the SR flip-flop 11 has returned to the reset state, so the AND gate 12 outputs a pulse signal. Therefore, the pointer drive is 1
The step is stopped. In other words, the correction switch S
If the contents of second counter 3 are within the range of 20 to 29 seconds when is operated, the pointer (minute hand) has already moved.
Since it is at the 20 seconds position, the contents of second counter 3 will be 40 even after 20 seconds have passed since correction switch S was operated.
The minute hand is kept on standby at the 20 second position until the second is reached, and the content of the second counter 3 is made to match the position of the hand.

Next, if the content of the second counter 3 is within the range of 30 to 39 seconds, the content of the ternary counter 4b is (n
-1)/n=1, the decoder 21 outputs the signal d, and the decoder 20 outputs the signal b, and the AND Since the pulse signal is applied to the gate 23, when the correction switch S is operated in this case, the pulse signal from the one shot circuit 26 is outputted from the AND gate 23. As a result, the contents of the 2decimal counter 4a and the ternary counter 4b are cleared, and the contents of the minute counter 5 are incremented by 1, so that the delay of 21 to 30 seconds in the second counter 3 is corrected. At the same time, two pulse signals are generated and output from the two-pulse generating circuit 29, so that the pointer is fast-forwarded by two steps. That is, if the content of the second counter 3 is within the range of 30 to 39 seconds when the correction switch S is operated, the pointer (minute hand) is at the 20 second position, so by fast forwarding by two steps, The pointer will be adjusted to the 00 second position.

Next, if the content of the second counter 3 is within the range of 40 to 59 seconds, the content of the ternary counter 4b is (n
-1)/2+1=2 or more, that is, "2", and the signal e is given from the decoder 21 to the AND gate 25, which is the fourth correction control means, so the correction switch S is operated in this case. Then, the pulse signal from the one shot circuit 26 is outputted from the AND gate 25. As a result, the contents of the 2decimal counter 4a and the ternary counter 4b are cleared, and the contents of the minute counter 5 are incremented by 1, so that the delay of 1 to 20 seconds in the second counter 3 is corrected. At the same time, the one-shot pulse signal output from the AND gate 25 causes the pointer to move to 1.
The step will be fast-forwarded. In other words, when the correction switch S is operated, the contents of the second counter 3 are between 40 and 50.
When the time is within the seconds range, the pointer (minute hand) is at the 40 second position, so by fast forwarding one step, the pointer is corrected to the 00 second position.

In this way, the content of the second counter 3 is detected when the correction switch S is operated, and the pointer is stopped for a predetermined time or fast-forwarded to a predetermined position depending on the detected content of the second counter 3. Even when using a step motor that cannot be used, corrections of ±30 seconds can be made. Furthermore, since the digital display time and the hand display time can be corrected by ±30 seconds at the same time, it is possible to match the digital display time and the hand display time. Therefore,
This is particularly effective in pointer-type electronic watches that have a digital display function.

In the above embodiments, a case where the present invention is applied to a pointer type electronic timepiece having a digital display function is shown, but the present invention is not limited to a timepiece having a digital display function. Furthermore, although the above embodiment has been applied to a device in which the minute hand is moved in three steps to advance one minute, the present invention is not limited thereto. Moreover, in the above embodiment, ±30
Although the case where the second correction is performed is shown, other correction methods may be applied.

As explained above, this invention moves the minute hand to n(n
is an odd number of 3 or more) In an electronic clock that is step-driven and moves by the minute, there is a first counting means for counting 60/n seconds, and a count value of the first counting means is 60/n.
A detection means for detecting whether it is less than 2n seconds and a second counting means for counting the carry signal of the first counting means are provided, and when the correction switch is operated, the detection result of the second counting means and the detection means is provided. Since the stop or advance of the pointer is controlled according to the time, corrections of ±30 seconds can be made with a simple configuration.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a circuit diagram of a pointer-type electronic timepiece having a digital display function to which the present invention is applied, and FIG. 2 is a diagram showing a display state. 3...Second counter, 4a...2decimal counter, 4b...
Ternary counter, 18a...Coil, 18b...Rotor, 20, 21...Decoder, 29...2 pulse generation circuit.

Claims (1)

[Scope of Claims] 1. A time adjustment device for a two-hand pointer type electronic timepiece that moves the minute hand in n steps (n is an odd number of 3 or more) to move the minute hand, the first clock counting 60/n seconds. a counting means, a detection means for detecting whether the count value of the first counting means is less than 60/2n seconds, and a means for moving the minute hand one step each time a carry signal is output from the first counting means. a minute hand drive means for driving; a second n-adic counting means for counting the carry signal of the first counting means; a switch for correcting seconds; and a correction means for correcting the minute hand based on the count value of the means and the detection result of the detection means, and the correction means has a count value of the second counting means of (n+1)/2.
a first correction control means that clears the first and second counting means and stops the minute hand for a count value of the second counting means x 60/n seconds when the count value of the second counting means is less than 60/n seconds; Count value is (n-1)/2
and when the detection means detects that the count value of the first counting means is less than 60/2n seconds, the first and second counting means are cleared and the second count value x a second correction control means for stopping the minute hand for 60/n seconds; and a count value of the second counting means is (n-1)/2.
and when the detection means detects that the content of the first counting means is not less than 60/2n seconds, the first and second counting means are cleared and the minute hand is moved by (n+1)/2 steps. Step 3
a correction control means, and a count value of the second counting means is (n-1)/2.
It is characterized by comprising fourth correction control means for clearing the first and second counting means and advancing the minute hand in steps by the count value of the n-th counting means when the count value is +1 or more. Time adjustment device for pointer type electronic watches.