JPS6032146B2 - 2-hand crystal wristwatch - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a circuit configuration of a quartz wristwatch that moves the hands at a longer cycle than the seconds hand movement, and has a two-hand operation confirmation, initial setting, hand alignment function, and time difference correction function. Regarding quartz crystal watches.

Conventional quartz watches that move the hands using an electromagnetic converter generate a one-second pulse using a semiconductor circuit such as a C-MOSC to generate a 1-second pulse from the frequency of the crystal oscillator, convert it electromechanically using a step motor or an ankle-type converter, I walked through the line and started moving the needle.

These watches are well known, so I won't go into details about them, but they had various problems, such as a complicated structure and high current consumption. On the other hand, two-hand crystal wristwatches, which appeared with the aim of being thinner, smaller, simpler in structure, and lower in power consumption, operate at a cycle longer than the 1-second step and have only two hands for minutes and hours. The time display function is satisfactory, but when I try to start the initial operation after inserting a battery, etc., when using a crystal clock that uses an alternating pulse feed type step motor, it does not move for up to 2 minutes, or 1 minute. In the case of ankle transducers with directional pulse operation, there were downtimes of up to 1 minute.

Such a phenomenon is inconvenient for both manufacturers and users, and requires countermeasures. Furthermore, rate adjustment is normally done by detecting the magnetic flux leaking from the electromagnetic transducer through the case to the outside of the case, but if this magnetic flux changes at long intervals, it is impossible to measure with conventional measuring instruments. Met.

In addition, there were other problems in that the structure for aligning the needles, the means for phasing the circuit and the motor, etc. were complicated.

For reference, an example of a two-hand quartz watch is shown below.
The figure is a top view, and inside there is a crystal oscillator 1, a battery 2,
It incorporates a converter 3, a circuit 4, etc., and displays the time using only the minute hand 5 and hour hand 6, and moves the minute hand 5 and hour hand 6 intermittently with the sand at 6. In addition, 7 shows a watch case, and 8 shows a crown and its mechanism for adjusting the time. In addition,
There is also a phasing mechanism between the circuit and the motor, but the explanation will be omitted. FIG. 2 shows a circuit diagram of this watch, and the same numbers indicate the same elements.

That is, it has a crystal oscillator 1 that vibrates at several KH2 to several hundred KHZ, and a circuit 4 generates alternating pulses with a cycle of one minute, which is converted into rotational motion by a step motor 3, and a minute hand 5 and an hour hand 6.
to move the hands.

Such watches had the problems mentioned above.To solve some of the above problems, watches that used electro-optical display elements such as liquid crystals and light emitting diodes only to display seconds were proposed, but The advantages of two-hand crystal wristwatches have been diminished due to the increase in power consumption, the number of parts, and the number of man-hours required for installation.

In view of the above points, it is an object of the present invention to provide a quartz wristwatch that has the advantages of a two-hand wristwatch and has functions and circuits that solve the above drawbacks.

The configuration of the present invention is described below with reference to FIG. 3. Reference numeral 1 is a crystal oscillator, 9 is an oscillation circuit thereof, and 10 and 11 are frequency dividing circuits for obtaining a clock signal and a fast-forwarding signal of 1/2 cutting period. Reference numeral 12, which is shown divided for convenience, is a counting circuit, which generates a pulse signal with a period of one minute, which is a normal drive signal.

13 and 16 are data type flip-flops (hereinafter referred to as data FF), 14 is a set-reset flip-flop (hereinafter referred to as RS-FF), 15 is a timer circuit, and 1/1 of the frequency divider circuit 11. Instruct the table feeding signal of the sand stealing cycle and set the output to H level after 3 deposits. A drive circuit 17 drives the pulse motor 18 by determining the period of the drive signal to be 1'2 seconds or 1 minute.

19 is an or gate, 20, 21 is an and gate, 22,
23 is a switch operated by an external operating member.

The switch 22 is a switch for initial setting, and the switch 23 is a switch for IJ setting and needle alignment. Next, this operation will be explained.

When a battery (not shown) is inserted and the switch 23 is closed, an H level is applied to the set input S of the RS-FF 14, and the output Q becomes an H level.

At the same time, the FF 16 is reset, and the output Q becomes H level (that is, the output Q becomes L level). Further, the timer circuit 15 is also set to 0 seconds, and at the same time, the AND gate 21 is also opened. The frequency dividing circuit 11 and the counting circuit 12 are also reset.
When the switch 23 is opened again, if the switch 22 is closed, the output Q of the data FF 13 will be at H level, so if you open this switch 22, the FF
13 becomes L level, the frequency dividing circuit 11 starts running, and therefore the timer circuit 15 also outputs 1 from the frequency dividing circuit 11.
/2 Start counting the fast-forward signals for sand cycles. On the other hand, if the switch 22 is open, the timer circuit 15 starts counting fast-forward signals with a period of 1'2 seconds from the time the switch 23 is opened. The timer circuit 15 changes the output OUT to H when a fast forward signal with a period of 1'2 seconds is given for 30 seconds (60 pulses).
level, the reset input R of the RS-FF 14 is set to H level through the OR gate 19, and the output Q of the RS-FF 14 is set to L level. The drive circuit 17 is an RS-FF
The drive state of the pulse motor 18 is suppressed depending on the state of the output Q of the pulse motor 14. The circuit is such as to apply a drive signal with a period of one minute to the pulse motor 18 (shown in FIG. 4 and described later). Furthermore, since the data FF 16 uses the drive signal output from the drive circuit 17 as a clock input signal, when even one drive signal is received, the output Q of the data FF 16 becomes H level. Thereafter, the state will not change unless switch 23 is closed. Before the output Q of the FF 16 changes to H level and the output OUT of the timer circuit 15 changes to H level (that is, 3
If the switch 22 is closed before the data F
The output Q of F13 becomes H level, the output of AND gate 20 also becomes H level, and through OR gate 19, RS
- Set the reset input of FF14 to H level, and RS-FF
The output Q of No. 14 is set to L level. Since the state of the RS-FF 14 does not change unless the switch 23 is closed again, the drive circuit 17 continues to send a one-minute period drive signal to the pulse motor 10. FIG. 4 is a detailed circuit diagram of the drive circuit 17, and an AND gate 17a, an AND gate 17b, and an OR gate 17c determine whether a normal drive signal with a one-minute cycle of the input lnl or a normal drive signal of the input ln2 is determined by the logic of the input ln3. Select the fast forward signal with a 1/2 second cycle (2Hz) and press T.
Type flip-flop 17d, AND gate 17e, 17
A circuit system is adopted in which a well-known unidirectional pulse consisting of OR gates 17g and 17h is applied to the drive fill of the step motor 0 as a pulse current in alternate directions.

To briefly describe the operation of what has been explained above, this embodiment has two switches 22 and 23 that can be operated externally, and when either switch 22 or 23 is closed, the hand movement operation stops and the clock circuit is cleared.

2 When the switch 22 is open, closing the switch 23 will clear the above, and when the switch 23 is opened again, the minute hand will start moving in steps of 1/a sand cycle, and after moving 3 inkstones, it will move in normal 1 minute cycle steps. automatically returns to the state in which it is performed.

3 When the switch 22 is closed during the operation of 2, the clock is cleared and the pointer stops the step operation of 1/milk sand period, and when it is opened, it returns to the state of performing the step operation of 1 minute period.

In other words, operation 1 above allows for adjusting the clock hands and initial setting after battery replacement, operation 2 allows operation confirmation in addition to the above, and operation 3 allows the confirmation operation to be stopped at any time. be.

Furthermore, the needles can be aligned by the above-mentioned related operations.

That is, as a result of the above-mentioned operation 2, the pulse motor is driven for three inkstone intervals using the fast-forwarding signal of 1/phantom sand cycle, so that the pointer correction is performed by the equivalent of one hour in terms of the amount of movement of the pointer.

Even during the above-mentioned 30 seconds, it is possible to stop the fast-forwarding operation at any time by performing the operation in step 3 above and return to the normal driving state. Furthermore, rate measurement can be performed during fast forwarding.

When presenting a clock that uses a circuit with the above functions, it consists of a crystal oscillator, its frequency adjustment element, an integrated circuit element that combines the above circuits, a step motor, a small gear train, and two We present a mechanical crystal wristwatch that eliminates all conventional mechanical mechanisms that ensure various modifications and operations using only pointers, a push-button switch or a switch that opens and closes with a crown, the exterior, batteries, and wiring components. You can.

Furthermore, since the correcting operation automatically stops after the hands have been moving for one hour, repeating this operation makes it easy to correct the time difference and can be used as a world clock. It should be noted that although numerical values are limited in the examples, it should be understood that these are added to make the content easier to understand.

For example, the signal for fast forwarding is 1/milk step, a pulse with a period of 30
Although the normal drive signal is limited to a pulse signal with a period of 1 minute, such as 60 pulses per second, the present invention is not limited to this and is merely a desirable example. However, the pulse interval for normal feeding is preferably in the range of 5 seconds to 2 minutes from the viewpoint of reducing power consumption, functionality, and visibility.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional two-hand crystal watch, FIG. 2 is a circuit diagram thereof, FIG. 3 is a circuit diagram of the present invention, and FIG. 4 is a detailed circuit diagram of a part thereof. 1... Crystal oscillator, 3, 18... Step motor,
4... Clock circuit, 5... Minute hand, 6... Hour hand, 22
, 23...Switch. Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1. A crystal oscillation circuit, which divides the signal from the crystal oscillation circuit to generate a normal drive signal having a period between 5 seconds and 2 minutes, and a fast-forward signal having a period shorter than the normal drive signal. a step motor driven according to either the normal drive signal or the fast forward signal;
In a two-hand crystal wristwatch equipped with a minute hand and an hour hand that are moved by the step motor, for switching the step motor from a state in which it is driven in accordance with a normal drive signal to a state in which it is driven in accordance with a fast-forward signal. When the first switching control means counts the number of pulses of the fast-forward signal equivalent to one hour's worth of hand movement after the switching, the step motor is automatically brought into a state where it is driven in accordance with the normal drive signal. a timer circuit that forms an output for automatic return; and a timer circuit that causes the step motor to be driven in accordance with a normal drive signal even before the output for automatic return is formed. A two-hand crystal wristwatch, characterized in that it is provided with a second switching control means for returning to the desired state, and an external operating member for operating the first and second switching control means.