JP2534581Y2 - Analog clock - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to an analog timepiece,
More specifically, the present invention relates to a hand position correcting mechanism for an analog timepiece that adjusts the hands to the correct time.

[0002]

2. Description of the Related Art Conventionally, in correcting a clock display according to a time signal, in a digital clock, a clock switch is reset to zero by pressing a reset switch, and the display time of a display unit for displaying the contents of the clock counter is extremely easy. On the other hand, in the case of an analog timepiece, it takes time to return the hands, and the operation of the correction switch has to be maintained.

For this reason, recently, a position detecting element for detecting the position of a pointer such as a photocoupler is incorporated in a watch, and the speed of the pointer is increased by pressing a push switch. An analog timepiece incorporating a return-to-zero mechanism for stopping the hands or moving the hands at a normal speed upon detecting return has come to be used.

One example of a clock circuit having this zero-reducing mechanism is:
As shown in FIG. 13, an oscillation circuit 12 that outputs a reference frequency signal, and a reference that outputs a fast-forward reference signal Φ2 and a standard reference signal Φ3 by dividing the reference frequency signal output by the oscillation circuit 12 by a frequency dividing circuit 13 Normally, a standard reference signal Φ3 is sent to a motor drive circuit 17 via a switching circuit 15 using a signal generation circuit 11, and a stepping motor 19 is rotated at a constant speed by a normal drive pulse corresponding to the frequency of the standard reference signal Φ3. When the reverse rotation signal and the correction instruction signal are output from the correction switch circuit 25 having the normal rotation correction switch 21 and the reverse rotation correction switch 23, the motor drive circuit 17 outputs the phase of the drive pulse output to the step motor 19 by the reverse rotation signal. To change the motor 19 in the reverse direction, and in the switching circuit 15, when the correction instruction signal is input, the frequency of the correction instruction signal is higher than that of the standard reference signal Φ3. The high-speed reference signal Φ2 is passed through and the high-speed reference signal Φ2 is sent to the motor drive circuit 17, so that the motor drive circuit 17 causes the step motor 19 to rapidly rotate by the fast-forward drive pulse corresponding to the fast-forward reference signal Φ2. Some watches and the like are provided with a position detecting element such as a photocoupler and a return-zero switch circuit.

The return-to-zero switch circuit 48 uses a set / reset flip-flop, a D-flip-flop, and a push switch, and operates the return-to-zero switch 49 as the push switch. The D-flip-flop at 48 outputs an H-level return-zero instruction signal, and inputs this return-zero instruction signal to the switching circuit 15 to supply a fast-forward reference signal from the switching circuit 15 to the motor drive circuit 17 in the same manner as the correction signal. Output.

Further, the position detecting elements such as the light emitting diode 36 and the phototransistor 37 in the detecting circuit 35 are provided with the position detecting elements on a dial or the like to directly detect the hour position of the second hand or the minute hand, or the second hand wheel. Alternatively, by detecting the detection position provided on the second hand shaft or the detection position provided on the minute hand wheel or the minute hand shaft, the rotation angle of the second hand shaft or the minute hand shaft is detected, so that the hour position of the hands is detected. The reset signal is reset by a detection signal output from the position detecting element detecting the hourly position of the pointer to stop the output of the return-zero instruction signal.

[0007]

In a timepiece in which a detection element is provided on the dial and a zero-return mechanism is incorporated, the detection element is visible on the surface of the timepiece, and has a disadvantage that the appearance of the dial is deteriorated. In the case where the hour position of the hands is detected by the rotation angle of the minute hand wheel or minute hand shaft, etc., when the hands are mounted on the pointer shaft, the hands are aligned so that the hands indicate the correct hour when the pointer shaft is at the reference angle position. However, there is a disadvantage that the assembling work is complicated.

Further, the zero-return mechanism for performing only rapid-forward movement of the pointer in one direction during the zero-return operation may require a long time for the zero-return operation, and depending on the position of the pointer at the start of the zero-return operation. The zero-return mechanism for fast-return or fast-forward has the disadvantage that the stop position is slightly different depending on the rotation direction of the pointer because the detection element has a detection width, and an error occurs in the stop position depending on the rotation direction when stopping at the hour position. Was.

[0009]

Means for Solving the Problems The present invention is synchronized with the guidelines.
A detecting unit on a half-peripheral portion of the rotating body that rotates
The pointer is driven forward and reverse in response to the detection signal of
Zero signal output circuit and direction control circuit and change of detection signal
After overrunning according to
Stop by the change of the output signal and move the pointer to the predetermined position
With zero return mechanism with end control circuit
In the timepiece, the watch stops at a stop position due to a change in the detection signal.
The deviation amount between the pointer position and the predetermined position is stored.
After reaching the stop position, move the pointer by the deviation amount.
Analog clock provided with an error adjustment circuit .

[0010]

[Operation] The analog timepiece according to the present invention has a detecting portion on a half-peripheral portion of a rotating body which rotates in synchronization with the hands, so that detecting the presence or absence of the detecting portion allows the hands to rotate half a turn from the hour position. It can be easily detected whether or not it has passed.
Further, zero-reset mechanism, the zero-reset signal output circuit, thus to output the return instruction signal by detecting an operation of the zero-reset switch, it is possible to disclose the zero-reset operation of the pointer by operating the zero-reset switch, direction Since the control circuit outputs a direction signal instructing forward / reverse rotation in accordance with the presence / absence of the detection signal, that is, the position of the detection unit, the pointer operation at the time of return to zero can be rotated in a direction close to the normal time.

Further, the end control circuit of the return-to-zero mechanism outputs an end signal when the detection signal is not input when the return start pulse is input, and outputs the end signal when the detection signal is input. When the detection signal is input, when the input is restarted after the input of the detection signal is interrupted, the end signal is output, and the zero return operation is ended by the end signal. Coupled with the fact that the rotation direction of the pointer is determined by the presence or absence of the detection signal,
The direction of rotation of the hands immediately before the zero-stop can always be kept constant.

Since the error adjusting circuit stores the angle difference between the position of the detecting portion disclosed by the sensor circuit and the hour position of the pointer, and outputs the corrected position signal after the output of the detection signal, the detecting portion has a 180-degree angle of the pointer. Even if there is a width of the minute, the exact position of the pointer can be correctly detected by the end of the detection unit.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a control circuit for an analog timepiece according to the present invention divides a reference signal output from an oscillation circuit 12 by a frequency divider 13 to output a plurality of reference signals. The generation circuit 11 and, among the plurality of reference signals,
Switching circuit 15 for selecting a desired reference signal based on the correction signal from correction switch circuit 25 and sending it to motor drive circuit 17
And the input of the reverse rotation signal from the correction switch circuit 25, the rotation direction of the step motor 19 is determined.
The clock circuit having the motor drive circuit 17 that determines the pulse width of the motor drive pulse based on the reference signal Φ0 from the controller and outputs the motor drive pulse to the step motor 19 is detected. And a reset signal output circuit 41 for outputting a return start pulse signal to the C signal.
And the detection pulse signal Φ when the return instruction signal is output.
T is repeatedly output to the position detection circuit 35, and a position detection signal output circuit 31 that also outputs a detection confirmation signal ΦS synchronized with the detection pulse signal ΦT, and a detection output signal ΦR from the position detection circuit 35. A direction control circuit 51 for outputting a direction signal for determining the rotation direction of the step motor 19 to an I signal, an end control circuit 61 for outputting an end signal to a P signal, and a corrected position signal to an R signal in response to the detection signal. An error adjustment circuit 71 is provided.

In the position detecting circuit 35, for example, a photocoupler is used as a detecting element, and a semicircular reflecting mirror is provided on a disc-shaped detecting plate 81 attached to the minute hand shaft as shown in FIG. The detection circuit 35 detects the position of the detection unit 83 by receiving, with the phototransistor 37, the light output from the light emitting diode 36 of the photocoupler serving as the detection element and reflected by the detection unit 83.

The correction switch circuit 25 outputs an H-level correction signal to the S signal when the forward rotation correction switch 21 is operated, and this correction signal is input via the first OR circuit 27. When the correction signal is not input, the switching circuit 15 passes the standard reference signal Φ3 to the motor drive circuit 17 and the position detection signal output circuit 31, and when the correction signal is input, the fast-forward reference signal The motor drive circuit 17 and the position detection signal output circuit 3
When the reverse rotation correction switch 23 is operated, the correction switch circuit 25 outputs an H-level correction signal to the S signal and outputs an H-level reverse signal to the T signal to perform the reverse rotation. When a signal is input to the motor drive circuit 17 via the second OR circuit 29, the drive circuit 17
Shifts the phase of the drive pulse signal sent to the step motor 19, and the step motor 19 reversely rotates, as in the conventional case.

Then, as shown in FIG. 3, the return-to-zero signal output circuit 41 has a first input terminal connected to the D-input terminal to the H level power supply.
The clock input terminal of the D-flip-flop 42 is connected to the H-level power supply through the return switch 49, the reset input terminal of the first D-flip-flop 42 is connected to the Φ0 output terminal of the reference signal generation circuit 11, and The Q output terminal of the flip-flop 42 is connected to the reset input terminal of the second D-flip-flop 44 through the fourth AND circuit 43 and
It is connected to the clock input terminal of the D-flip-flop 45 and an end control circuit 61 described later, and the D input terminals of the second D-flip-flop 44 and the third D-flip-flop 45 are both connected to the H level power supply, 4
4 is connected to the input terminal of the first NAND circuit 46 and a direction control circuit 51 described later, and the Q output terminal of the third D-flip-flop 45 is connected to the first NAND circuit 46 and the first NAND circuit 46.
It is connected to the switching circuit 15 via the OR circuit 27 and a position detection signal output circuit 31 described later, and the clock input terminal of the second D-flip-flop 44 is connected to the position detection signal output circuit 31
, The reset input terminal of the third D-flip-flop 45 is connected to an end signal output terminal of an end control circuit 61 to be described later, and the output terminal of the first NAND circuit 46 is connected to the fourth AND circuit. 43 is connected to another input terminal.

The position detection signal output circuit 31 generates a detection confirmation signal .PHI.S having a pulse width smaller than the detection pulse signal .PHI.T by the first AND circuit 32 based on the reference signal .PHI.1 from the reference signal generation circuit 11, and issues a return instruction. When the signal is input, the detection confirmation signal ΦS is
The detection pulse signal ΦT is output from the third AND circuit 34.

Accordingly, as shown in FIG. 5, when the return-zero switch 49 is operated and the A-signal becomes H level, the return-to-zero signal output circuit 41 outputs the Q signal of the first D-flip-flop 42.
The output B signal is set to H level, the second D-flip-flop 44 is reset, and the second D-flip-flop 4 is reset.
The D signal which is the Q output of No. 4 is set to L level,
The E signal, which is the Q output of the D-flip-flop 45, is set to the H level to output a return instruction signal to the E signal.

It should be noted that the first D-flip-flop 42 is Φ
Since the signal is reset by the 0 reference signal, a single H pulse is output to the B signal which is the Q output of the first D-flip-flop 42, and the H signal output to the B signal is output.
The pulse is sent to the later-described end control circuit 61 as a return start pulse signal by the C signal via the fourth AND circuit 43, and the second D-flip-flop 44 outputs the Q output when the detection confirmation signal φS is input. A certain D signal is returned to H level, the output of the first NAND circuit 46 is set to L level, and the fourth AND circuit 43 is closed, so that noise is not input to the second D-flip-flop 44 and the third D-flip-flop 45. .

The direction control circuit 51 connects the D input terminal of the fourth D-flip-flop 52 to the detection output terminal of the detection circuit 35, as shown in FIG.
T, and the fourth D-flip-flop 52
Is connected to the Q output terminal of the second D-flip-flop 44 in the return zero signal output circuit 41, and the inverted Q output terminal of the fourth D-flip-flop 52 is connected to the input terminal of the first NOR circuit 53, The other input terminal of the first NOR circuit 53 is connected to the input terminal of the second NOR circuit 54 and the inverted Q output terminal of the third D-flip-flop 45 in the return-to-zero signal output circuit 41. The output terminal is a direction signal output terminal.
3 is connected to the drive circuit 17 via the second OR circuit 29. The output terminal of the second NOR circuit 54 is connected to the reset input terminal of the n-ary counter 55, and the n-ary counter 55
Is connected to the output terminal of the second AND circuit 33 in the position detection signal output circuit 31 to input the detection confirmation signal ΦS, and the carry signal output terminal of the n-ary counter 55 is connected to the fourth D-flip-flop 52. The other input terminal of the second NOR circuit 54 is connected to a reset input terminal, and is connected to an end control circuit 61 described later.

Accordingly, as shown in FIG. 6, the direction control circuit 51 detects when the detection element in the detection circuit 35 detects the detection unit 83 and a pulse-like detection signal is output as the detection output signal ΦR. When the D signal, which is the Q output of the second D-flip-flop 44 in the return signal output circuit 41, changes to the H level by the detection confirmation signal .PHI.S, the D input terminal of the fourth D-flip-flop 52 is set to the H level by the detection signal. Therefore, the G signal, which is the inverted Q output of the fourth D-flip-flop 52, is at the L level, and the I signal, which is the output of the first NOR circuit 53, is at the H level. The same H level signal will be output.

Then, N from an end control circuit 61 which will be described later
When the signal goes low, the reset state of the n-ary counter 55 is released, and when n pulses in the detection confirmation signal are input, a carry signal is output from the n-ary counter 55 and the fourth D-flip-flop 52 To the reset state, the G signal is set to the H level, and the first NOR circuit 53 outputs
The direction signal output from the motor driving circuit 17 is set to L level, and the driving pulse signal from the motor driving circuit 17 is
Is returned to the normal rotation phase.

When the detection output signal .PHI.R is maintained at the L level, that is, when the detection element in the detection circuit 35 does not detect the detection unit 83, as shown in FIG.
The inverted Q output of the fourth D-flip-flop 52 is maintained at the H level, and the I signal output from the first NOR circuit 53 is at the L level.
Level, and the direction signal does not output the reverse rotation signal.

That is, the direction control circuit 51 detects a detection output signal by detecting the detection unit 83 when the detection element detects the L level return zero signal as the inverted E signal from the return zero signal output circuit 41. If a pulse-like detection signal is output to ΦR, an I-level direction signal is output to the I signal, and if no detection signal is output to the detection output signal ΦR, an L-level direction signal is output, and When the H-level direction signal is output, the I signal is returned to the L level after the required number of pulses are output as the detection confirmation signal ΦS after the L level interruption signal is output to the N signal. .

As shown in FIG. 4, the end control circuit 61 connects the output terminal of the detection output signal ΦR of the detection circuit 35 to the fifth D-flip-flop 64 via the fifth AND circuit 62 and the third OR circuit 63. A detection signal is inputted by connecting to the D input terminal, and a clock input terminal of the fifth D-flip-flop 64 is connected to an output terminal of the second AND of the position detection signal output circuit 31 to receive the detection confirmation signal ΦS; A reset start pulse output to the C signal by connecting the set input terminal of the fifth D-flip-flop 64 and the reset input terminal of the sixth D-flip-flop 65 to the output terminal of the fourth AND circuit 43 in the reset signal output circuit 41 And a fifth D-flip-flop 6.
4 is connected to the input terminal of the sixth AND circuit 66 and the second NOR circuit 54 of the direction control circuit 51, and the inverted Q output terminal of the fifth D-flip-flop 64 is connected to the sixth D-flip-flop 65. To the clock input terminal,
The D input terminal of the sixth D-flip-flop 65 is connected to the H level power supply, and the Q output terminal of the sixth D-flip-flop 65 is connected to the sixth AND circuit 66 and the negative input terminals of the fifth AND circuit 62 and an error adjustment circuit 71 described later. The other input terminal of the third OR circuit 63 is connected to the output terminal of the output AND circuit 76 in the error adjustment circuit 71.

Accordingly, as shown in FIG. 8, when the return start pulse signal is output from the reset signal output circuit 41 to the C signal, the end control circuit 61 outputs the fifth D-flip-flop 6.
4 is set, the N signal as the Q output is set to the H level, the sixth D-flip-flop 65 is set to the reset state, and the O signal as the Q output is set to the L level. As described above, the O signal which is the Q output of the sixth D-flip-flop 65 becomes L
When the level reaches the level, the fifth AND circuit 62 is opened, and when a pulse-like detection signal is output as the detection output signal ΦR, the pulse-like detection signal is converted to a K signal via the fifth AND circuit 62 and further to a K signal. The signal is output to the M signal via the third OR circuit 63 and is input to the D input terminal of the fifth D-flip-flop 64. Since this detection signal is synchronized with the detection confirmation signal ΦS which is the clock input of the fifth D-flip-flop 64, the N signal which is the Q output of the fifth D-flip-flop 64 is maintained at the H level, and the detection element Does not detect the detection unit 83 of the detection plate 81, the detection output signal ΦR is maintained at L level, the N signal which is the Q output of the fifth D-flip-flop 64 becomes L level, and the inverted Q output Becomes the H level, the O signal which is the Q output of the sixth D-flip-flop 65 is set to the H level, the fifth AND circuit 62 is closed, and the error adjustment circuit 71
To output an H level start position signal.

Thereafter, the detection output signal ΦR of the detection circuit 35
When the pulse-shaped detection signal is output again, since the fifth AND circuit 62 is closed, when an H-level signal is output to the R signal from the error adjustment circuit 71, the H-level corrected position signal is output. Is the input of the fifth D-flip-flop 64, the Q output of the fifth D-flip-flop 64 is H
Level, the P signal which is the output signal of the sixth AND circuit 66 is set to H level, and the end signal is output to the reset signal output circuit 41.

As shown in FIG. 9, when the detection output signal .PHI.R of the detection circuit 35 is maintained at the L level when the return start pulse signal is output as the C signal, first, the return start pulse signal is used. After the fifth D-flip-flop 64 is set and the sixth D-flip-flop 65 is reset, the fifth D-flip-flop 64 is reset.
D input is L because no detection signal is input to D input
Since the signal is maintained at the level, the N signal, which is the Q output of the fifth D-flip-flop 64, becomes L level immediately after the pulse of the detection confirmation signal ΦS is input to the fifth D-flip-flop 64, and the sixth D-flip-flop 64 The O signal which is the Q output of the H level 65 goes to the H level, and the fifth AND circuit 62
And waits for the corrected position signal output from the error adjustment circuit 71 to the R signal, and then outputs an end signal at the L level from the sixth AND circuit 66.

As shown in FIG. 4, the error adjusting circuit 71 includes a plurality of D flip-flops connected in series,
The D input terminal of the stage D flip-flop is connected to the output terminal of the detection output signal φR in the detection circuit 35, and the clock input terminal of each D flip-flop is connected to the second AND output terminal of the position detection signal output circuit 31. To input a detection confirmation signal ΦS, and each Q output terminal of each D-flip-flop has one input terminal at H level through a dip switch.
The other input terminals of each AND circuit connected to the level power supply are connected, the outputs of all the AND circuits are collectively connected by a multi-input OR circuit 75 to the output AND circuit 76, and the other inputs of the output AND circuit 76 are connected. The terminal and the input terminal of the inverter 78 are connected to the Q output terminal of the sixth D-flip-flop 65 in the termination control circuit 61, and the output terminal of the inverter 78 is connected to the reset input terminal of each D-flip-flop. .

Therefore, when the start position signal is input to the O signal from the end control circuit 61, the error adjustment circuit 71
Since the output AND circuit 76 is opened and the reset state of each D-flip-flop is released, the termination control circuit 61
After the H level start position signal is input to the O signal from
When a pulse-like detection signal is output as the detection output signal ΦR, the m-th Q output of the D-flip-flop, which is connected in series when m pulses determined by the setting of the dip switch are input, is set to the H level. This H level signal is sent to the end control circuit 61 via the multi-input OR circuit 75 and the output AND circuit 76, and the detection element is
After detecting the first detection unit 83, when the detection confirmation signal .PHI.S is delayed by m pulses, the R signal is set to the H level and the corrected position signal is output. The correction position signal is output when the detection signal is input.

As described above, in the clock circuit according to the present embodiment,
When the return-to-zero switch 49 is operated, the return-to-zero signal output circuit 41 outputs a return instruction signal to the E signal, outputs a return start pulse signal to the C signal, and the return instruction signal causes the switching circuit 15 to output the fast-forward reference signal Φ2 to the motor. The signal is sent to the drive circuit 17 to increase the speed of the step motor 19, and the position detection signal output circuit 31 outputs a pulse-like detection confirmation signal ΦS
And a detection pulse signal ΦT is output.

When the detecting element of the detecting circuit 35 does not detect the detecting portion 83 of the detecting plate 81, the detecting circuit 3
5 is not output as the detection output signal ΦR, and the direction control circuit 51 outputs an L-level direction signal as the I signal. Rotates forward, and rapidly moves the pointer in the forward direction.

As described above, when the pointer and the detection plate 81 are fast-forwarded in the forward direction, and the detection element of the detection circuit 35 detects the detection portion 83 of the detection plate 81, a detection signal is output as a detection output signal ΦR, and m When the detection signal is input to the error adjustment circuit 71, the error adjustment circuit 71 outputs a corrected position signal to the R signal, causes the end control circuit 61 to output the end signal to the P signal, and outputs a return signal 41 Then, the output of the return instruction signal that has been output to the E signal is stopped, and the step motor 19 is returned to the normal hand operation.

When a return signal or a return start pulse signal is output from the return-to-zero signal output circuit 41, the detection element detects the detection unit 83, and when a detection signal is output as the detection output signal ΦR, The direction control circuit 51 sets the I signal to the H level and outputs a direction signal equivalent to the reverse rotation signal to the motor drive circuit 1.
7 and the step motor 19 can be quickly rotated in the reverse direction.

When the detecting element stops detecting the detecting portion 83, the end control circuit 61 outputs an L-level interruption signal to the N signal to release the reset state of the n-ary counter 55 in the direction control circuit 51. Thereafter, when n pulse signals are output as the detection confirmation signal and the hands are returned by n pulses more than the hour position, the direction control circuit 51 changes the I signal to the L level to change the direction signal, The drive circuit 17 returns the rotation direction of the step motor 19 to the normal rotation direction.

In this state, n pulses are output to the fast-forward reference signal Φ2, the hands are corrected in the hour direction again, and when the detecting element detects the detecting section 83 again, m pulses are detected from the start of detection of the detecting section 83. When the detection confirmation signal is output and the pointer correctly indicates the hour position, the correction position signal is output from the error adjustment circuit 71, the end signal is output from the end control circuit 61, and the pointer It will return to hand operation.

In the case where the detection start position of the detection unit 83 and the hour position of the hands are correctly matched by the detection element and the hands are mounted on the hands, the clock circuit without the error adjustment circuit 71 may be used. . As described above, in the present embodiment, since the detection unit 83 is provided on the half circumference of the detection plate 81 to determine the rotation direction at the time of the zero-return operation, the return direction of the pointer can be easily performed at the shortest distance to the hour position. When returning in the reverse rotation direction, once passing the hour position and then returning to the normal rotation direction to complete the return-to-zero operation, errors due to the detection width of the detection element and mechanical backlash are reduced. The pointer can be correctly stopped at the hour position.

Further, since the error adjusting circuit 71 is provided, the pointer is attached in a state where the position at which the detection unit 83 of the detection plate 81 starts to detect the forward rotation and the hour position of the pointer are slightly shifted. Even in this case, by operating the dip switch in the error adjustment circuit 71, it is possible to correct the error between the detection start position of the detection unit 83 by the detection element and the hour position of the pointer, and to perform an accurate zero-return operation. it can.

In still another embodiment, as shown in FIG. 10, a return instruction signal output from the reset signal output circuit 41 to the E signal may be input to the switching circuit 15 and the termination control circuit 61. . In the second embodiment, the position detection signal output circuit 31 is formed by a single AND, and a detection confirmation signal ΦS having a narrow pulse width is always output in synchronization with the detection pulse signal ΦT. The detection output signal ΦR output from 35 is supplied to the direction control circuit 5 via the error adjustment circuit 71.
1 to the end control circuit 61 and the error adjustment circuit 71
As shown in FIG. 11, after the detection element of the detection circuit 35 detects the detection unit 83 of the detection plate 81, m detection signals set by the dip switches are output as the detection confirmation signal ΦS, and When the number of pulses is output as the detection output signal ΦR, a corrected position signal of the H level is output to the U signal which is the output of the multi-input amplifier, the detection element does not detect the detection unit 83, and the detection output signal ΦR is output. After the detection signal is no longer output, when m pulses are output to the detection confirmation signal ΦS, the output of the corrected position signal is stopped by setting the U signal to the L level, and the detection unit formed on the pointer mounting position and the detection plate 83 is always corrected, and when the pointer indicates a range of 180 degrees from the hour position, the H-level corrected position signal is replaced with a detection signal and the D input of the fourth D-flip-flop 52 in the direction control circuit 51 is changed. Terminal and The in Ryo control circuit 61 5
The signal is output to the D-input terminal of the D-flip-flop 64.

As shown in FIG. 11, the termination control circuit 61 to which the corrected position signal has been input receives the U signal from which the corrected position signal is output as the D input of the fifth D-flip-flop 64 and outputs the zero signal. The return instruction signal output from the circuit 41 to the E signal and the detection confirmation signal ΦS from the position detection signal output circuit 31 are used as clock inputs to the fifth D-flip-flop 64 via the seventh AND circuit 67. The return start pulse signal output from the return-zero signal output circuit 41 to the C signal is used as the set input signal of the fifth D-flip-flop 64 and the reset input signal of the sixth D-flip-flop 65, and the output of the sixth AND circuit 66 is terminated. Signaling is the same as in the first embodiment.

Therefore, in the second embodiment, when the pointer always indicates a range of 180 degrees from the hour position, the error adjustment circuit 71
Converts the corrected position signal into a detection signal and outputs the signal. The direction control circuit 51 determines the H level and the L level of the direction signal based on the corrected position signal, and the end control circuit 61 outputs the end signal and the interruption signal. Therefore, when the pointer indicates a range of 180 degrees from the hour position, fast return is performed, and then fast forward is performed.
If less than zero, a zero-return operation can be performed by fast-forwarding.

The semicircular detecting section 8 provided on the detecting plate 81
3 is not limited to the case where the detection unit 83 is formed using a mirror, and a detection plate 81 may be provided with a semicircular through-hole, and the detection plate 81 may be provided between the light emitting diode 36 and the phototransistor 37. In some cases, the detecting portion may be formed only half a circumference around the pointer shaft. Further, in the above embodiment, when the phototransistor 37 of the detection circuit 35 detects the detection unit 83 such as a mirror surface, the pointer is attached to the pointer shaft so that the pointer indicates a range of 180 degrees from the hour position. In the case where the first NOR circuit 53 in the direction control circuit 51 is replaced with an OR circuit, and in the second embodiment, an inverter is inserted into the output of the multi-input OR circuit 75 in the error adjustment circuit 71 or the like, so that the detection plate is connected. The semi-circular portion which is not a mirror surface portion or a through hole to be formed is used as a detecting portion, and the mounting position of the detecting plate and the pointer can be shifted by 180 degrees.

[0043]

The analog timepiece according to the present invention is provided with a detecting portion on a half-periphery portion of the rotating body which rotates in synchronization with the hands in the timepiece whose rotation can be corrected in the normal / reverse direction. Can be detected within a degree,
The direction control circuit can correct and drive the pointer in the reverse rotation or the forward rotation direction which is the shortest distance to the hour position, and the direction control circuit and the end control circuit stop the pointer at the hour position at the time of normal rotation correction, At the time of reverse rotation correction, since the return to zero mechanism is terminated when the pointer reaches the hour position by rapid traverse after fast reverse, quick return to the correct hour position is always performed easily. That can be done.

Further, the angle difference, which is the amount of deviation between the detection start position when the sensor circuit detects the detection section and the hourly position of the pointer , is stored, and after the detection signal is input, the corrected position signal is stored. Is also provided, an error adjustment circuit that outputs an error can be obtained, so that it is possible to obtain a corrected position signal obtained by correcting the deviation between the reference angle position of the pointer shaft at which the detecting element detects the detecting unit and the hourly position of the pointer. At the time of mounting on the pointer shaft, a mounting error of the pointer is allowed, and the mounting operation of the pointer can be facilitated.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a clock circuit of an analog timepiece according to the present invention.

FIG. 2 is a diagram showing an example of a detection plate used in the analog timepiece according to the present invention.

FIG. 3 is a diagram showing a specific example of a reset signal output circuit and a direction control circuit in the analog timepiece circuit according to the present invention.

FIG. 4 is a diagram showing a specific example of an end control circuit and an error adjustment circuit in the analog timepiece circuit according to the present invention.

FIG. 5 is a diagram showing each signal in the analog timepiece according to the present invention.

FIG. 6 is a diagram showing each signal in the analog timepiece according to the present invention.

FIG. 7 is a diagram showing each signal in the analog timepiece according to the present invention.

FIG. 8 is a diagram showing each signal in the analog timepiece according to the present invention.

FIG. 9 is a diagram showing each signal in the analog timepiece according to the present invention.

FIG. 10 is a block diagram showing a second embodiment of the analog timepiece according to the present invention.

FIG. 11 is a diagram showing a specific example of the second embodiment of the analog timepiece according to the present invention.

FIG. 12 is a diagram showing signals in a second embodiment of the analog timepiece according to the present invention.

FIG. 13 is a block diagram showing an example of a conventional clock circuit.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 Reference signal generation circuit 15 Switching circuit 17 Drive circuit 19 Step motor 21 Reverse rotation correction switch 23 Forward rotation correction switch 25 Correction switch circuit 31 Position detection signal output circuit 35 Detection circuit 41 Return zero signal output circuit 49 Return zero switch 51 Direction control circuit 61 End control circuit 71 Error adjustment circuit

Claims (1)

(57) [Scope of request for utility model registration] 1. A semi-peripheral part of a rotating body which rotates in synchronization with a pointer.
A detection unit, and in response to a detection signal of the detection unit,
The pointer is driven forward / reverse and the detection signal changes.
Overrun according to reverse rotation drive and detection again
Stop by the signal change and move the pointer to the predetermined position.
An analog timepiece having a zero-return mechanism for setting a pointer position at a stop position due to a change in the detection signal;
The shift amount from the predetermined position is stored, and when the stop position is reached.
An error adjusting circuit for moving the pointer by the amount of deviation after
Analog clock characterized by having provided .