JP3745052B2 - Pointer-type electronic watch - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pointer-type electronic timepiece.
[0002]
[Prior art]
Conventional electronic watches include watches with various modes such as chronograph and alarm. When these timepieces shift from one mode to another mode, they take measures to send the hands quickly in order to adjust the display of the timepiece to the mode after the transition. Even for the user, the time required for determining the display by changing the mode is reduced, which is an effective means for a timepiece having multiple modes.
[0003]
By the way, the hand movement when displaying the normal time uses a load compensation pulse for the purpose of saving current consumption. This load compensation pulse is divided into two blocks: a drive pulse and a correction pulse. First, the drive pulse is output to detect whether it has rotated, and if it does not rotate, a correction pulse with a driving force to rotate is always output. If it is rotating, the output of the correction pulse is prohibited. With the second hand movement of 1 step per second, this load compensation pulse is output once per second. It has become.
[0004]
For fast-forwarding of the needle, it is sufficient to output the load compensation pulse earlier, but this pulse considering the time required to output the drive pulse and the correction pulse limits the rotation cycle. Therefore, a fast-forwarding pulse was prepared to rotate at a faster cycle. This fast-forwarding pulse is obtained by giving a large driving force to the driving pulse and eliminating the correction pulse. By doing so, the time taken to output the pulse is only the drive pulse, and a fast rotation cycle can be obtained.
[0005]
By the way, the conventional multi-function timepiece described above usually has a demonstration hand. In this demonstration movement, the position of the gears in the state where the train wheel is assembled is indeterminate, so that the positional relationship between the gears is clarified and the train wheel is checked so that it does not deviate from the dial scale at the time of stitching. It is provided for the purpose of, etc., and is usually fast-forwarded due to the workability of needle attachment.
[0006]
Such a conventional demonstration hand movement method will be described with reference to FIG. FIG. 2 is a block diagram of a conventional fast-forwarding method. 1 is an all-reset switch, 2 is an oscillation circuit, 3 is a frequency-dividing circuit, 4a is a frequency-dividing circuit 3, and a fast-forwarding pulse is generated and generated at 64 Hz. The fast-forwarding generation circuits A and 5 set the number of outputs and issue an output command to the fast-forwarding generation circuit A4a. When recognizing that a fast-forwarding pulse is output from the fast-forwarding generation circuit A4a, a subtraction circuit for subtracting 1 from the number of outputs, 6 is driven. A circuit, 7 is a converter, 8 is a gear, and 9 is a second hand with 60 steps per revolution. Usually, the demonstration hand movement is often performed by performing an all reset in the 0 position alignment mode for setting the reference position of the hands such as hours, minutes, and seconds, and the 0 position alignment mode is also assumed in FIG . Other clock functions, operations, mode changing methods, and the like are well-known techniques and are not necessary for explaining the present invention, and will be omitted. The same applies to the hour / minute hand and other function hands, and therefore these are also omitted.
[0007]
The actual operation will now be described. When the all reset switch 1 is turned on in one shot, the subtracting circuit 5 sets the number of outputs 60 to perform a demonstration hand movement, and issues an output command to the fast-forwarding generation circuit A4a. In response to this command, the fast forward generation circuit A4a outputs a fast forward pulse. Next, when the subtraction circuit 5 recognizes that a pulse has been output, the output number is decremented by 1, and at the same time, the pulse is transmitted to the converter 7 via the drive circuit 6, and the converter 7 turns the gear 8. This operation is performed until the number of outputs of the subtraction circuit 5 becomes zero.
[0008]
Thus, all the conventional demonstration hands use the fast-forwarding pulse, and as described above, this pulse has a driving force larger than that of the driving pulse used at the normal time. There is a difference in driving force between two pulses. The difference appears in the transducer and the gears associated with it. The state of the converter and the gears by these two pulses will be described below with reference to FIG.
[0009]
First, a description will be given of the case where the drive pulse is output at the normal time. The converter 7 rotates to the first position 1a, and at the same time, the gear 8 is rotated to the fourth position 2a. Thereafter, the converter 7 is returned to the third position 1c by the holding force. Next, when the fast-forwarding pulse is output, the converter 7 rotates to the second position 1b and simultaneously the gear 8 is rotated to the fifth position 2b because it has larger energy than the drive pulse used at the normal time. Similarly to the case of the drive pulse used at the normal time, the converter 7 is returned to the third position 1c by the holding force. Thus, it can be seen that there is a difference in gear feed between the two pulses.
[0010]
[Problems to be solved by the invention]
As described above, in the conventional technology, the position of the gear after completion of the fast-forwarding pulse hand used in the demonstration is shifted from the position of the gear of the driving pulse used at the normal time. When the hands were attached, the dial was off the scale on the dial at the normal time.
An object of the present invention is to solve the above-mentioned problems and to eliminate the deviation of the needle from the scale on the dial due to the difference in the gear feed due to the difference in pulse.
[0011]
[Means for Solving the Problems]
To achieve the above object, the present invention provides a pointer, a first driving pulse circuit for generating a first driving pulse for driving the pointer with a small driving force , and a larger driving pulse than the first driving pulse. in the second pointer-type electronic timepiece having a driving pulse circuit for generating a second drive pulse for driving the pointer by the driving force, the pointer n onset (n is an integer of 2 or more) when driving After driving the pointer by the number of pulses less than the n times by the second driving pulse, driving the pointer until reaching the n times by the first driving pulse and then stopping the pointer. It is characterized by .
Also, the period of the first driving pulse is characterized by longer than the period of the second driving pulse.
Further, the first drive pulse is a drive pulse at the time of normal time hand movement.
In addition, when the pointer is driven n times (n is an integer of 2 or more), it is at the time of mode transition of the pointer type multi-function timepiece, at the time of demonstration hand movement, at the time of zero return operation, or at the time of alarm ON / OFF display. It is characterized by.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention. The same components as those in FIG.
[0013]
Reference numeral 4b denotes a fast-forwarding generation circuit B which is a first driving pulse circuit for generating a first driving pulse with a small driving force. The driving pulse used at the normal time is generated by using the frequency dividing circuit 3 at 16 Hz. Generate . 5 is a subtracting circuit which is a counting means, sets the number of outputs, issues an output command to the fast-forwarding generation circuit A4a and the fast-forwarding generation circuit B4b, and decrements the output number by 1 when it is confirmed that a pulse has been output. 10 is a counter value detecting means for detecting the number of outputs of the subtracting circuit 5 and, if the detection result is 4 or more , a fast feed generating circuit A4a which is a second driving pulse circuit for generating a second driving pulse having a large driving force. If it is 3 or less, the selection means 11 to be described later is controlled so as to output the fast-forwarding generation circuit B4b. Reference numeral 11 denotes selection means for selecting either the fast-forwarding generation circuit A4a or the fast-forwarding generation circuit B4b.
[0014]
Next, the operation will be described. After the all reset switch 1 is turned on by one shot, the subtraction circuit 5 sets the number of outputs 60 to perform the demonstration hand movement, and issues an output command to the fast-forwarding generation circuit A4a and the fast-forwarding generation circuit B4b. In response to this command, the fast-forward generation circuit A4a and the fast-forward generation circuit B4b each output a pulse. Here, since the counter value of the subtracting circuit 5 is 60, the counter value detecting means 10 controls the selecting means 11 to output the pulse of the fast-forward generating circuit A4a. This pulse is sent to the driving circuit 6 and simultaneously to the subtracting circuit 5. Therefore, the second hand 9 is fast-forwarded, and the subtraction circuit 5 decreases the count value by one every time one pulse is input. When the value of the subtracting circuit 5 becomes 3, the counter value detecting means 10 switches the pulse output from the selecting means 11 to the pulse generated by the fast-forward generating circuit B4b. Therefore, the second hand 9 is driven at 16 Hz, and at the same time, the counter value of the subtracting circuit 5 is subtracted. When the counter value becomes 0, the subtracting circuit 5 cancels the command that has been output to the fast-forwarding generation circuit A4a and the fast-forwarding generation circuit B4b. Therefore, the second hand 9 also stops. That is, the second hand 9 operates with a fast and large driving force of 64 Hz until the 57th operation of the demonstration hand movement, and the remaining three operations operate with a slightly slow small driving force of 16 Hz (a driving force equivalent to that during normal hand movement). Therefore, at the end of the demonstration hand movement, the fast feed generation circuit B4b, that is, the drive pulse used at the normal time is always sent, and the state of the gear 8 at this time is always the fourth position 2a in FIG. If the second hand 9 is attached in this state, there will be no deviation from the dial of the dial during normal time hand movement.
[0015]
Although the embodiment of the present invention has been described above, the present invention is not limited to this, and the present invention can be implemented by driving at least the last one with the drive pulse at the time of normal time hand movement.
Further, the pointer is not limited to the second hand, and the present invention can be implemented for an hour / minute hand, a calendar hand, and the like.
In addition to the demonstration hand movement, it is also effective when a zero return operation is performed, for example, as a clock having a chrono mode, or when fast-forwarding is performed when an alarm is turned ON / OFF using a pointer.
[0016]
【The invention's effect】
According to the present invention as described above, guided by when n onset (n is an integer of 2 or more) you drive, after driving the hands only small number of pulses than n onset by a second drive pulse of a large driving force In order to stop the pointer after driving the pointer until the nth pulse is reached by the first driving pulse with a small driving force, for example , when fast-forwarding, the gear is used at a normal time at least one before it stops By using a driving pulse with such a small driving force, the gear is stopped and the state where the gear is stopped is always constant, so that there is no effect that the needle is not displaced even when the needle is attached to the dial scale. It is done.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a block diagram according to the prior art.
FIG. 3 is a diagram illustrating a difference in gear feed between a drive pulse used at a normal time and a fast-forward pulse.
[Explanation of symbols]
4a Fast forward generation circuit A
4b Fast forward generation circuit B
5 Subtraction circuit 10 Counter value detection means 11 Selection means

Claims (2)

Guidelines,
A first driving pulse circuit for generating a first driving pulse for driving the pointer with a small driving force, which is also a driving pulse during normal time hand movement;
A second drive pulse circuit that generates a second drive pulse for driving the pointer with a driving force that is shorter than the cycle of the first drive pulse and greater than the first drive pulse. In the pointer type electronic timepiece,
When driving the pointer n times (n is an integer of 2 or more),
After driving the pointer by the number of pulses smaller than the n number of pulses by the second driving pulse, driving the pointer until reaching the n number of times by the first driving pulse, and then stopping the pointer. A characteristic pointer-type electronic watch.   When the pointer is driven n times (n is an integer of 2 or more), it is at the time of mode transition of the pointer type electronic timepiece, at the time of demonstration hand movement, at the time of zero return operation, or at the time of alarm ON / OFF display. The pointer-type electronic timepiece according to claim 1.

Images