JPS597952B2 - How to adjust the second hand of an electronic watch and its device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a second hand adjustment method for an electronic timepiece and a second hand adjustment device directly used for carrying out the method.

The conventional method for correcting the second hand is to store the position of the second hand in a memory circuit, issue a correction instruction, and at the same time compare the memory contents of the memory circuit with the actual 00 seconds, and fast-forward or stop the second hand by the difference. What works is well known.

However, this method has the disadvantage that the configuration of the memory circuit for memorizing the position of the second hand is extremely complicated.
There is a drawback that the actual second hand position and the contents of the memory circuit that stores it do not match, making it impossible to make accurate corrections.

Therefore, the present invention proposes a method and device for correcting the second hand without such drawbacks.The gist thereof is to adjust the second hand based on a correction instruction signal until it is detected by a mechanism that detects the arrival of the second hand at the 0 second position. The second hand is fast-forwarded and, according to the number of pulses used for this fast-forwarding, it is controlled whether to move the second hand in steps of 1 second from the θ second position or to keep it at the 0 second position for a predetermined counting time. .

In the following, the invention will be explained in detail with reference to the illustrated embodiments.

A second hand (not shown) is normally moved in one-second steps by inputting an IHz pulse from a second hand one-second movement means 2 to a second hand drive mechanism 1 that drives the second hand.

When correcting the indicated position of the second hand, if you perform a prescribed external operation to stop the second hand in advance, the second hand will stop at 3,000 steps.
As a result, the IHz pulse from the second hand one-second movement means 2 that is input to the second hand drive mechanism 1 is interrupted, and the second hand immediately stops.

In this stopped state, when a correction instruction is received by an external operation, that is, when a correction instruction signal is input to the second hand fast-forwarding means 4, a pulse of, for example, 32 Hz is supplied from this to the second hand 1 drive mechanism 1, and the second hand is fast-forwarded. be done.

When the second hand stop operation and correction instruction are performed at the same time,
The second hand does not stop; it is fast forwarded.

During this fast forwarding, a counter 5 counts the pulses used for the fast forwarding.

When the second hand reaches the 0 second position due to this fast forwarding, it is detected by the second hand 0 second position arrival detection mechanism 6, and a detection signal from this is input to the counter 5, which stops its counting operation.

Therefore, the counter 5 counts the number of fast-forward pulses used from the start of fast-forwarding of the second hand until it reaches the 0 second position.

This counter 5 is, for example, a 30-decimal counter, and if the count value of the fast-forward pulse is less than 30, as described above, <
The second hand 1-second movement means 2, whose effective output of IHz pulses is cut off, is restored to its original state, and if it exceeds 30,
A minute timer 7 is operated.

Therefore, if the interval at which the second hand is fast-forwarded to the θ second position (change in the indicated position) is 30 seconds or more, this is determined to be a delay, and the hand moves in 1 second steps immediately after reaching the O second position. is restarted, and if the end of 30 seconds is reached, it is determined that the timer has advanced, and the 1-minute timer 7 is set to IH.
It remains in the θ seconds position until counting z pulses for 1 minute,
After one minute has elapsed, the original 1-second step movement of the hands begins.

Therefore, it can be said that the second hand 0 position arrival detection mechanism 6 and the counter 5 together constitute a determining means 8 that determines whether or not the second hand lags or advances after 30 seconds.

As the second hand 0 position arrival detection mechanism 6, for example, the second hand
The one shown in the figure can be considered.

The fourth wheel 9, which is one of the second hand interlocking bodies, is provided with a hole (not shown) that passes through it vertically.

In addition, the gear train insert 10 includes a light emitting element 1 such as a light emitting diode.
1, and a light receiving element 13 such as a phototransistor or photodiode is attached to the stator 12, respectively.

These holes, the light emitting element 11, and the light receiving element 13 are arranged in such a relationship that when the second hand reaches the O second position, the light from the light emitting element 11 passes through the hole and enters the light receiving element 13. .

Therefore, when the second hand reaches the 0 second position, a predetermined electrical signal is sent from the light receiving element 13, that is, a second hand O second position arrival detection signal.

The second hand O second position arrival detection mechanism 6, in addition to the one shown in FIG. The sensor may be one that performs reflection or non-reflection detection.

Furthermore, the detection is not limited to optical detection, but may also be magnetic detection using a reed switch or the like, or detection of a switch by contact.

As described above, the present invention fast-forwards the second hand to the 0-second position regardless of its current indicated position, and then determines the number of pulses used for this fast-forward. After reaching the 0-second position, the user can select whether to move the second hand in 1-second steps or to hold it for a predetermined counting time, and the position of the second hand is always memorized using a memory circuit. In addition to making the circuit configuration extremely simple compared to the conventional method that requires
Correction is certain.

Moreover, especially according to the correction device of the present invention as set forth in claim 5, the second hand can be stopped in advance before the correction operation can be performed, and the correction can be performed more reliably. be.

[Brief explanation of drawings]

FIG. 1 is a block diagram for explaining one embodiment of the present invention, and FIG. 2 is a side view of essential parts showing a specific example of a second hand O position arrival detection mechanism. 1...Second hand drive mechanism, 2...Second hand 1 second movement means, 3...Second hand stopping means, 4...Second hand fast forwarding means, 5
... Counter, 6... Second hand θ second position arrival detection mechanism,
9... Fourth wheel which is a second hand interlocking body, 11... Light emitting element, 13... Light receiving element.

Claims (1)

[Claims] 1. Based on the correction instruction signal, the second hand is fast-forwarded until the arrival of the O second position is detected by a mechanism that detects the arrival of the second hand, and according to the number of pulses used for this fast-forwarding, the second hand is A method for correcting the second hand of an electronic watch, characterized by controlling whether to move the hand in 1-second steps from the 0-second position or to keep it at the 0-second position for a predetermined counting time. 2. A means for moving the second hand in 1-second steps, a means for rapidly advancing the second hand, a 1-minute timer that can hold the movement of the second hand until counting for 1 minute, and a mechanism for detecting when the second hand reaches the 0-second position. When the second hand is fast-forwarded by the fast-forwarding means until it is detected by the detection mechanism, a means for determining the number of pulses used for fast-forwarding up to that point and moving the hand in steps of one second based on the determination result; A second hand adjustment device for an electronic watch, comprising means for effectively operating one of the timers. 3. A mechanism for detecting the arrival of the 0 second position is provided in the light emitting element and in the optical path of the light from the light emitting element, and when the second hand reaches the 0 second position, the light enters the light receiving element. A second hand adjustment device for an electronic timepiece according to claim 2, comprising a second hand interlocking body that allows or blocks light, or changes the amount of incident light. 4. The second skew correction device for an electronic timepiece according to claim 3, wherein the second hand interlocking body is a fourth wheel. 5. Means for moving the second hand in steps of 1 second, means for stopping the second hand, means for fast forwarding the second hand after stopping by the stopping means, and means for suspending movement of the second hand until one minute has been counted. minute timer and
A mechanism for detecting the arrival of the second hand at the O seconds position, and when the second hand is fast-forwarded by the fast-forwarding means until it is detected by this detection mechanism, the number of pulses used for fast-forwarding up to that point is determined, and based on the determination result. A second hand correction device for an electronic timepiece, comprising means for moving the hand in one-second steps and means for effectively operating one of the one-minute timers.