JP2002168975A - Automatically correctable clock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatically correctable clock capable of surely conducting receiving with excellent sensitivity while avoiding influence by noise at driving. SOLUTION: This automatically correctable clock for correcting displayed time by receiving a time code is provided with a CdS sensor 19 for detecting the lightness and the darkness; and a control circuit 14 for stopping a second hand 202, a minute hand 203 and an hour hand 204 without outputting control signals CTL1 and CTL2, which are motor pulse signals, and automatically receiving a standard radio signal after supplying driving electricity to a standard radio signal receiving system 11 when the time code is not receivable exceeding a predetermined time, for example, 24 hours, and the CdS sensor 19 detects the dark condition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic timepiece such as a radio-controlled timepiece which adjusts the time by receiving a radio signal.

[0002]

2. Description of the Related Art A radio-controlled timepiece has a function of receiving, for example, a long-wave (40 kHz) standard radio wave transmitting the Japanese Standard Time with high accuracy and performing a so-called zero return based on a received signal. A pointer position detecting device is provided to accurately adjust the position of the pointer to the correct hour at the time of zero return.

This type of radio-controlled timepiece has a built-in receiving system circuit for receiving a standard radio wave, and a control circuit for driving a pointer driving system based on the received signal to correct the time. Has, for example, an initial correction mode without time data in an initial state and a normal correction mode.

In the initial correction mode, for example, when a radio-controlled timepiece is purchased and placed at a predetermined place indoors, a battery is first inserted and set at a predetermined position of the timepiece. Next, as an initial needle adjustment, a needle position detection and a zero return operation are performed. When the return-to-zero operation is completed, reception of the standard radio wave by the receiving circuit is started, and the received radio wave is input to the control circuit.

[0005] The control circuit performs a decoding operation to time based on the received radio wave input. As a result of decoding,
If the time can be set, the pointer position is corrected to a position corresponding to the decoded time code, the initial correction mode ends, and the mode shifts to the normal correction mode.

On the other hand, if the time cannot be set, the position of the hands is not corrected, and the user is notified of the fact by turning on, for example, an LED or the like as notification means provided in the timepiece body. .

In the normal correction mode, after the pointer position is corrected in the initial correction mode, the pointer position is corrected to a position corresponding to the time code of the received radio signal.

[0008]

By the way, in the case of the above-mentioned radio-controlled timepiece, while the standard radio signal is being received, the receiving antenna avoids a decrease in the receiving sensitivity due to picking up the noise of the motor pulse, so that the reception of the standard radio signal is prevented. The motor pulse is supplied to the driving motor of the pointer driving system at a timing not affected by the time data.

However, when the motor pulse is output by removing the gap of the time data, the AG included in the receiving circuit is output.
Since a C (Automatic Gain Control) amplifier cannot cope with a sudden change, a sufficient effect cannot be obtained, and the reception sensitivity may be reduced.

The radio-controlled timepiece described above has an analog display function of displaying the time by hands, but this analog radio-controlled timepiece has a three-handed analog hand having a second hand, a minute hand, and an hour hand. There is a corrected timepiece, or an analog two-handed radio-controlled timepiece having a minute hand and an hour hand.

In these analog radio-controlled timepieces, so-called ticking is generated because each hand is driven by a clock mechanism. In particular, in an analog three-hand radio-controlled timepiece, since the ticking of the second hand may hinder sleep, for example, a CdS sensor as light / dark detection means may be replaced by a dial as a time display unit of a watch body or a watch. Practical devices are placed on the side of the body to stop driving of the second hand, for example, when a dark state is detected by a light / dark detector after the light is turned off.

However, even if only the second hand is stopped in a dark place, noise is picked up when the hour and minute hands are driven, and the reception sensitivity is reduced.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an automatic correction timepiece capable of avoiding the influence of noise at the time of driving and capable of performing reliable reception with good sensitivity. Is to do.

[0014]

SUMMARY OF THE INVENTION To achieve the above object, the present invention relates to an automatic correction timepiece for correcting an analog display time by a hand in response to a time code, wherein the hand drives the hand in response to a control signal. Driving means, light / dark detection means for detecting light / dark, and when the time code cannot be received for more than a predetermined time, and when the light / dark detection means detects a dark state, the control signal is transmitted to the pointer driving means. And a control circuit for receiving the time code in a state where the time code is output to the means and at least one hand is stopped.

In the present invention, the control circuit outputs the control signal to the hand driving means when the light / dark detecting means detects a light state while the hand is stopped and receiving is being performed. The pointer in the stopped state is made to follow the current time display by fast-forwarding.

Further, in the present invention, the control circuit outputs the control signal to the pointer driving means when the reception is not performed as a result of stopping the pointer and receiving the signal, and the control circuit is in a stopped state. The pointer is made to follow the current time display by fast-forwarding.

Further, according to the present invention, there is provided reception state setting means for setting reception non-permission information when reception of the time code cannot be performed for more than a predetermined time.
In the case where the set information is set to unreceivable in the reception state setting means, and when the light / dark detection means detects the dark state, the reception is performed with the hands stopped, and the reception is successful. Resets the non-reception information of the reception state setting means.

According to the present invention, for example, when the time code cannot be received for more than a predetermined time, the reception status information is set in the reception status setting means. If the dark state is detected by the light / dark detection, and the reception disabled information is set in the reception state setting means, a control signal is output from the control circuit to the pointer driving means, for example, the second hand, the hour and minute hands are stopped, The time code is received. In the control circuit, for example, when the reception is performed with the hands stopped, if the bright state is detected by the light / dark detection means, or if the reception is stopped as a result of stopping the hands and receiving, the reception is not possible. Then, the control signal is output to the pointer driving means, and the pointer in the stopped state is driven so as to follow the current time display in fast-forward, and is corrected in fast-forward. Further, in the control circuit, when the set information is set to the non-receivable state in the reception state setting means, and when the dark state is detected by the light / dark detection means, the reception with the hands stopped is performed.
When the reception is successful, the operation of resetting the reception impossible information of the reception state setting means is performed.

[0019]

FIG. 1 is a block diagram showing an embodiment of a signal processing system circuit of a radio-controlled timepiece with a time function as an automatic timepiece according to the present invention, and FIG. FIG. 3 is a cross-sectional view showing an entire configuration of an embodiment of a hand position detecting device for a timepiece, and FIG. 3 is a plan view of a main part of the hand position detecting device for a radio-controlled timepiece according to the present invention.

In FIG. 1, reference numeral 10 denotes a signal processing system circuit;
Is a standard radio signal reception system, 12 is a reset / forced reception switch, 13 is an oscillation circuit, 14 is a control circuit, 15 is a drive circuit, 16 is a light emitting element as a reception state display means, 1
7 is a buffer circuit, 18 is a drive circuit, 19 is a CdS sensor as light / dark detection means, 20 is a 24-hour counter, 30 is a correction switch for manually (button operation) time correction, V _CC is a power supply voltage, C _{CC 1} -C ₃ are capacitors, R ₁ to R ₆ is the resistance element, 100 watch body, 120
Is a first drive system for driving the second hand, 130 is a second drive system for driving the minute hand and the hour hand which are hands, 140 is a light transmission type light detection sensor, and 150 is a manual correction system in which the user directly sets the time by hand. Are respectively shown. The reception state setting means is constituted by the control circuit 14 and the 24-hour counter 20, and the buffer circuit 17, the first drive system 1
The pointer driving means is composed of the control circuit 14, the drive circuit 18, the light transmission type light detection sensor 140, the first drive system 120 and the second drive system 1.
The pointer 30 constitutes a pointer position detecting means.

Light emitting element 16 as reception state display means
For example, as shown in FIG. 4, is provided near the 6 o'clock display portion, which is below the dial 201. The CdS sensor 19 as a light / dark detector is provided near the 5:00 display portion of the dial 201, for example, as shown in FIG. In FIG. 4, reference numeral 202 denotes a second hand, 203 denotes a minute hand, and 204 denotes an hour hand.

The standard radio signal receiving system 11 receives a long wave (for example, 40 kHz) including a time code signal transmitted from, for example, a key station and performs predetermined signal processing with the receiving antenna 11a, and performs a predetermined signal processing as a pulse signal S11. And a long-wave receiving circuit 11b that outputs the signal to the receiver. The long-wave receiving circuit 11 includes, for example, an RF amplifier, a detecting circuit, a rectifying circuit, and an integrating circuit.

The long-wave (40 kHz) standard radio wave transmitted by the standard radio signal receiving system 11 and transmitting the Japan Standard Time with high accuracy is transmitted in the form shown in FIG. Specifically, in the case of the "1" signal, a signal of 40 kHz is sent for 500 ms (0.5 s) during one second (s), and in the case of the "0" signal, the signal is transmitted for one second (s). 800ms
A signal of 40 kHz is transmitted for (0.8 s), and in the case of the “P” signal, 200 ms (0.2 s) in one second (s)
Only a signal of 40 kHz is sent. When the receiving state is good, the long wave receiving circuit 11b outputs a signal S11 to the control circuit 14 as a pulse signal corresponding to the presence or absence of 40 kHz as shown in FIG. 5B.

FIG. 6 shows an example of the time code of the standard time radio signal. The current longwave standard radio wave in Japan is transmitted from Fukushima Prefecture under the control of the Communications Research Laboratory (CRL) of the Ministry of Posts and Telecommunications, and the transmitted information includes the minutes, hours, and the accumulated date from January 1st. Has become.

The transmission of the time data is one frame at 1 bit / second, and one minute is one frame. In this frame, the above-mentioned information of the minute, hour, and integrated date from January 1 is provided by the BCD code. The transmitted data includes a marker called a P-code in addition to 0 and 1, and this P-code is present at several places in one frame, and is equivalent to the minute (0 second), 9 seconds,
Appears at 9, 29, 39, 49, and 59 seconds. This P code appears 59 times in one frame.
Only in the case of seconds and 0 seconds, the position that appears continuously becomes the minute position. In other words, time data such as minute / hour data is determined in the frame with reference to the minute position, so that the time data cannot be extracted unless the minute position is detected.

Next, the long standard radio wave will be described.

In the Japanese standard radio wave, in addition to the previous (at the time of the experimental station) transmission data, the last two digits, the day of the week, minute parity, hour parity, spare bits to be used when summer time is introduced, and leap seconds are added. (See FIG. 6A). Also,
At 15 minutes and 45 minutes each hour, wave stop information for interrupting transmission of radio waves was also added (see FIG. 6B). In the following, among these newly established information, the spare bits, the leap second information, and the interruption information will be described.

The spare bits are, as shown in Table 1, SU
1. Use SU2. These are provided for future information expansion. When this bit is used in summer time information, SU1 = SU2 = 0, "no change to daylight saving time within 6 days", SU1 = 1, SU2 = 0
Then, "There is a change to daylight saving time within 6 days", SU1 = 0.
SU2 = 1 means “during daylight saving time”, SU1 = SU2 = 1
In this example, the information format is such that "daylight saving time ends within six days". Regarding the switch to daylight saving time, summer time has not yet been introduced in Japan, and it is still unknown. However, looking at the change of daylight saving time in Europe, it often happens during the night.

[0029]

[Table 1]

The next leap second is LS as shown in Table 2.
LS1 = LS2 = 0, "leap second is not corrected within one month", LS1
= 1 · LS2 = 0 "There is a negative leap second (deletion) within one month", that is, one minute is 59 seconds, and LS1 = LS
2 = 1 means that there is a positive leap second (insertion) within one month
That is, the information format is such that one minute is 61 seconds. The timing of the leap second correction has already been determined and is to be performed immediately before January 1 or July 1 of the UTC time. Therefore, Japan Time (JTC)
Then, it will be performed just before 9:00 am on January 1 or July 1.

[0031]

[Table 2]

The stoppage information is shown in (a), (b) and (c) of Table 3.
, ST1, ST2, ST3, ST4, S
Using T5 and ST6, wave stop information of wave stop start notice is provided in ST1, ST2, ST3, wave stop time notice in ST4, and wave stop information in ST5, ST6. First, the stoppage notice will be described. When ST1 = ST2 = ST3 = 0, there is “no scheduled stoppage”, when ST1 = ST2 = 0, ST3 = 1, “stop within 7 days”, ST1 = 0, ST2 = 1.・ ST
When 3 = 0, “wave stops within 3 to 6 days”, ST1 = 0 · S
In T2 = ST3 = 1, “waves will stop within 2 days”, ST1 = 1
ST2 = ST3 = 0 "Wave stops within 24 hours", S
When T1 = 1.ST2 = 0.ST3 = 1, the wave is stopped within 12 hours. When ST1 = ST2 = 1.ST3 = 0, the wave is broken within 2 hours. Next, the break time notice
ST4 = 1 "only during the day", ST4 = 0 "all day,
Or there is no scheduled stoppage. " Next, the suspension period notice is S
When T5 = ST6 = 0, “No scheduled stoppage”, ST5 = 0.
For ST6 = 1, "7 days or more of suspension or unknown period", S
For T5 = 1 and ST6 = 0, "Wave stopped within 2 to 6 days, S
At T5 = ST6 = 1, it is “waves stop in less than 2 days”.

[0033]

[Table 3]

As described above, the transmission information by radio waves including the long-wave standard time information managed and operated by the Communications Research Laboratory (CRL) of the Ministry of Posts and Telecommunications has been described in detail. , Stoppage information is also included in the transmission information.

The reset / forced reception switch 12 is turned on when returning various states of the control circuit 14 to the initial state. When the reset / forced reception switch 12 is turned on or when a battery (not shown) is set, the radio-controlled timepiece enters a correction mode (forced correction mode) in which a standard time radio signal is forcibly received and corrected. Become.

The oscillation circuit 13 includes a crystal oscillator CRY and capacitors C ₂ and C ₃ , and supplies a basic clock having a predetermined frequency to the control circuit 14.

The control circuit 14 has a minute hand counter, a second hand counter, a standard minute / second counter, etc. (not shown). In the initial correction mode, the control circuit 14 receives the pulse signal S11 from the standard radio signal receiving system 11 and receives the received standard signal. The reception status of the radio signal is compared with a predetermined reference range,
If the reception state is within the reference range, the control signal CTL
_{1 and} CTL ₂ are output to the stepping motor 121 for the second hand and the stepping motor 131 for the hour and minute hands via the buffer circuit 17 to detect the pointer position (initial setting).
For example, a drive signal DR ₁ is output to a drive circuit 15 to emit a light emitting element (LED) 16 as reception state display means.
Is constantly blinking. On the other hand, when the reception state is not within the reference range, the drive signal DR ₁ is output to the drive circuit 15 without outputting the control signals CTL _{1 and} CTL ₂ , and, for example, the drive signal DR ₁ is output to the drive circuit 15. Light emitting element (LED) as output and reception status display means
16 stops the blinking operation at all times, and notifies the user that radio wave reception is almost impossible. Further, after the initialization is performed when the reception state is within the reference range, the received radio signal is decoded, and as a result of the decoding, if the time can be set, the oscillation circuit 13 uses the basic clock. In accordance with the count control of various counters and the input level of the detection signal DT ₁ by the light detection sensor, the control signals CTL _{1 and} CTL ₂ are supplied via the buffer circuit 17 to the stepping motor 121 for the second hand and the stepping motor 131 for the hour and minute hands. To perform fast-forward time correction control by performing rotation control.

On the other hand, as a result of decoding, if time cannot be set, the drive signal DR ₁ is output to the drive circuit 15 without outputting the control signals CTL _{1 and} CTL ₂ , and the light emitting element 16 is turned off. Turn off the light to notify the user that the radio wave reception is not good. Thus, the operation in the initial correction mode is completed.

After completing the operation in the initial correction mode, the control circuit 14 controls the normal correction mode. In the normal correction mode, the same operation as after the initial setting operation in the initial correction mode is performed. Specifically, the received radio signal is decoded, and if time is possible as a result of the decoding, the count control of various counters and the light detection sensor 14 based on the basic clock by the oscillation circuit 13 are performed.
In response to the input level of the detection signal DT ₁ due to 0, the control signals CTL _{1 and} CTL ₂ are output to the stepping motor 121 for the second hand and the stepping motor 131 for the hour and minute hands via the buffer circuit 17 to perform rotation control. Performs fast forward time correction control.

On the other hand, as a result of decoding, if time cannot be set, the drive signal DR ₁ is output to the drive circuit 15 without outputting the control signals CTL _{1 and} CTL ₂ , and the light emitting diode 16 is turned on. Turn off the light to notify the user that the radio wave reception is not good.

Further, the control circuit 14 controls the reception impossible information
It has a setting register. The control circuit 14
24 hours after resetting the counter
When an overflow occurs, this non-reception information
Unreceivable information (for example, logic "1") is set in the register
I do. Then, the control circuit 14 is used for the reception impossible information set.
Reception disabled information is set in the register and the
Dark state by light / dark detection of CdS sensor 19 as detection means
Is detected, the control signal CT, which is a motor pulse signal, is output.
L_1,CTL_Two Hand 202 and hour / minute hand 2
03, 204 in a stopped state, for example,
The driving power is supplied to the wave signal receiving system 11 to
Perform the receiving operation. Further, the control circuit 14 controls the second hand and the hour.
When the reception is stopped with the minute hand stopped,
Bright state is detected by light / dark detection of CdS sensor 19 as a step
Or the second hand 202 and the hour / minute hand 20
As a result of stopping and stopping 3, 204, reception was not possible.
Control signal C
TL _1,CTL_Two Through the buffer circuit 17 for the second hand.
Stepping motor 121 and stepping for hour and minute hands
Output to the motor 131, the pointer is fast-forwarded and the current time is displayed.
Fast forward time adjustment by performing rotation control to follow
Performs positive control. In addition, the control circuit 14 receives
When the reception disable information is set in the register for
And the brightness of the CdS sensor 19 as brightness detection means.
When the dark state is detected by the dark detection, the second hand 20 described above is used.
2 and the reception with the hour and minute hands 203 and 204 stopped
As a result, if reception is possible, the
Reset operation of unreceivable information of the register and 24 hours
The counter 20 is reset.

When the reception is not possible or when the correction switch 30 is input, the control circuit 14 stops the reception, detects the pointer position, and sets the reception disable information in the reception disable information register.

In the above description, when it is determined that the reception state is out of the reference range, the radio wave is weak or there is a lot of noise. If the signal is very weak,
As shown in (c), low signal (L) for several signals
Or high level (H). When there is much noise, the level changes regardless of the time radio wave. When the signal S11 in these states is received, for example, twice or more every 10 seconds, it is determined that the reception state is out of the reference range. Specifically, for example, when a change in level is not detected within 1 second within a time period of about 10 seconds and the detected pulse width is 0.
If the time is not around 8, 0.5, and 0.2 seconds, it is regarded as NG, and if NG occurs twice or more, it is determined that reception is impossible.

The drive circuit 15 is a pnp transistor
Q1 and resistance element R₁ , R_Two It consists of.
The base of the transistor Q1 is a resistor R₁ Control via
Drive signal DR of circuit 14₁ Connected to the output line
And the collector is a resistor R_Two Through the light emitting diode
Is connected to the anode of the light emitting element 16 composed of
Power supply voltage V_CCConnected to the supply line. And
The cathode of the light emitting element 16 is grounded. That is,
The light emitting element 16 is supplied from the control circuit
Signal DR ₁ To emit light when the
Connected to the circuit 15.

The drive circuit 18 includes a pnp transistor Q2 and resistance elements R ₃ and R ₄ .

The timepiece body 100 includes a lower case 111 serving as a second case which is connected to face each other to form an outline.
And an upper case 112 as a first case, and a middle plate 113 arranged in a state of being connected to the lower case 111 at a substantially central portion in a space formed by the lower case 111 and the upper case 112, The first drive system 120, the second drive system 130, the light detection sensor 140, the manual correction system 150, and the like are fixed or supported at predetermined positions of the lower case 111, the middle plate 113, and the upper case 112 in the space. ing.

As shown in FIGS. 2, 3 and 7, the first drive system 120 includes a substantially U-shaped stator 121a, a drive coil 121b wound around one leg of the stator 121a, and A second-hand stepping motor 121 constituted by a rotor 121c rotatably arranged between the other magnetic poles of the stator 121a;
First fifth wheel 1 as a first transmission gear (first detection gear) in which a large-diameter gear 122a meshes with a pinion 121c '
22 and a second hand wheel 123 as a second detection gear (first pointer wheel) meshed with the small-diameter gear 122b of the first fifth wheel & pinion 122. Here, the second-hand stepping motor 121 is configured such that the stator 121 a
The fixed is placed, the rotor 121c are axially supported on the intermediate plate 113 and the upper case 12, on the basis of the output control signal CTL ₁ of the control circuit 14, the direction of rotation, the rotation angle and rotation speed control Is done.

The first fifth wheel & pinion 122 has a large diameter gear 122a.
Are formed with 60 teeth and the small-diameter gear 122b is formed with 15 teeth. The small-diameter gear 122b is rotatably supported by the lower case 111 and the upper case 112. The large-diameter gear 122a is connected to the rotor 121c of the second-hand stepping motor 121. (Pinion 121
c ′) to reduce the rotation speed of the rotor 121c to a predetermined speed. As shown in FIGS. 9 and 11, the first fifth wheel & pinion 122 has three circular shapes arranged at equal intervals in the circumferential direction (center angle α1 is 120 °) in a region overlapping with the second hand wheel 123. Is formed. This through hole 122c not only allows the detection light of the light detection sensor 140 to pass, but at least one of the
Positioning hole when assembling the 5th wheel 122
It is used as

The second hand wheel 123 has a large-diameter gear 123a having 60 teeth, and one end of a shaft portion thereof is connected to the upper case 112.
The second hand shaft 123b is press-fitted to the other end which penetrates the middle plate 113 toward the lower case 111 side. The second hand shaft 123b is inserted into a minute hand pipe 134p described later, , A second hand 202 is attached. As shown in FIG. 10, the second hand wheel 123 has eleven circular shapes arranged at regular intervals (central angle α2 is 30 °) in the circumferential direction in a region overlapping with the first fifth wheel & pinion 122 by rotation. And a positioning light-shielding portion 123d having a different pitch at only one position (a through hole 123c and a through hole 12c).
(A central angle with 3c is 60 °). Then, when the through hole 122c of the first fifth wheel & pinion 122 first faces the through hole 123c after facing the positioning light shielding portion 123d, the second hand points to the hour.

The through hole 123c not only allows the detection light of the light detection sensor 140 to pass, but at least one of the
It is used as a positioning hole (a determining hole) when assembling the second hand wheel 123. In addition, these through holes 123
An arc-shaped biasing spring 123e that is long in the circumferential direction and protrudes in the rotation axis direction is defined by the notch hole 123f inside the inside of c. The arc-shaped urging spring 123e urges the second hand wheel 123 in the rotation axis direction.

Here, the positioning light-shielding portion 123d is formed at a position distant from the notch hole 123f in the circumferential direction, that is, at a region where the two notch holes 123f are interrupted and separated. Therefore, a sufficient distance between the notch hole 123f and the positioning light shielding portion 123e can be ensured.
In the region of the positioning light shielding portion 123d, the detection light does not go around the notch hole 123f, and the detection light can be reliably blocked by the positioning light shielding portion 123d.
That is, since the positioning light-shielding portion 123d is formed at a position away from the region where the notch hole 123f, which is likely to cause an erroneous detection due to the detection light wraparound, the positioning light-shielding portion 123d is set to the rotation angle of the second hand wheel 122. By using it for positioning, reliable positioning can be performed.

In the second hand wheel 123, as shown in FIG. 10, instead of providing a plurality of (11) through holes 123c, as shown in FIG. 11, the second hand wheel 123 is located at a position radially opposed to the positioning light shielding portion 123d. The other through-holes 123c are cut out of the cut-out holes 12c, respectively, while leaving only the through-holes 123c.
It may be opened integrally with 3 g. According to this, it is possible to further ensure the passage of the detection light in a portion where the passage of the detection light is permitted, and to reduce waste of the material forming the second hand wheel 122.

As shown in FIGS. 2, 3, and 8, the second drive system 130 includes a substantially U-shaped stator 131a, a drive coil 131b wound around one leg of the stator 131a, An hour / minute hand stepping motor 131 constituted by a rotor 131c rotatably arranged between the other magnetic poles of the stator 131a;
A second fifth wheel 132 as an intermediate gear in which a large-diameter gear 132a meshes with a pinion 131c 'of 1c, and a second transmission gear in which a large-diameter gear 133a meshes with a small-diameter gear 132b of the second fifth wheel 132 A third wheel 133 as a (third detection gear), a minute hand wheel 134 as a fourth detection gear (second pointer wheel) in which a large diameter gear 134a meshes with a small diameter gear 133b of the third wheel 133, The minute wheel 135 serving as an intermediate gear in which the large-diameter gear 135a meshes with the small-diameter gear 134b of the minute hand wheel 134, and the fifth detection gear (second pointer wheel) meshing with the small-diameter gear 135b of the minute wheel 135 of this day )). here,
The hour / minute hand stepping motor 131 includes a stator 131.
a is mounted on and fixed to the middle plate 113, and the rotor 131c is pivotally supported by the middle plate 113 and the upper case 112, and its rotation direction, rotation angle and rotation speed are determined based on an output control signal of the control circuit. Is controlled.

The second fifth wheel 132 is a large-diameter gear 132a.
The number of teeth is 60 and the number of teeth of the small-diameter gear 132b is 15 and is supported by the middle plate 113 and the upper case 112,
The large-diameter gear 132a is a stepping motor 1 for the hour and minute hands.
The rotation speed of the rotor 131c is reduced to a predetermined speed by meshing with the 31st rotor 131c (pinion 131c '). As the second fifth wheel & pinion 132, the above-mentioned first fifth wheel & pinion 122 may be diverted, that is, the one provided with the through-hole 122c may be used. As a result, parts can be shared and the cost of the product can be reduced.

The third wheel & pinion 133 has a large-diameter gear 133a having 60 teeth and a small-diameter gear 133b having 10 teeth. One end of a shaft is pivotally supported by the upper case 112, and the other end is a middle. The second fifth wheel 132 is decelerated by rotating the second fifth wheel 132 so as to be rotatable while penetrating the plate 113.
To communicate. As shown in FIG. 12, the second wheel 123 and the first fifth wheel 12
10 circular through holes 133 arranged at equal intervals (central angle α3 is 36 °) in the circumferential direction in a region overlapping with 2
c is formed. The through hole 133c not only allows the detection light of the light detection sensor 140 to pass therethrough, but at least one of the through holes 133c is used as a positioning hole (determining hole) when the third wheel & pinion 133 is assembled.

The minute hand wheel 134 has a large-diameter gear 134a having 60 teeth and a small-diameter gear 134b having 14 teeth, and has a central part in which a small-diameter gear 134b is integrally formed. Are formed to have a substantially T-shape in side view. And the minute hand pipe 134p
Is rotatably supported by the middle plate 13, and the shaft at the other end is rotatably inserted into an hour hand pipe 136 p of an hour wheel 136 described later. The minute hand 1 pipe 34
The p penetrates through the lower case 111 and protrudes toward the dial 201 of the timepiece, and has a minute hand 203 attached to its tip.

As shown in FIG. 13, the minute hand wheel 134 has a second hand wheel 123, a first fifth wheel 122,
Three arc-shaped through holes 134c, 134d, and 134e that are long in the circumferential direction are formed in a region overlapping with the third wheel & pinion 133. These arc-shaped through holes 134c and arc-shaped through holes 134
d is formed at a central angle α5 of 30 ° and is separated by 30 °, and the arc-shaped through holes 134d and 134e are 3 ° apart at a central angle α6.
The arc-shaped through holes 134e and 134c are formed at a central angle α7 of 60 ° and separated by 0 °. That is, the widest light shielding portion A is formed between the arc-shaped through holes 134e and 134c,
A light-shielding portion B narrower than the light-shielding portion A is formed between the arc-shaped through holes 134c and 134d and between the arc-shaped through-holes 134d and 134e.

The arc-shaped through hole 134c has a circular portion 134c 'at one end and a wide arc portion 134 extending from the other end.
c '' and a narrow arc portion 134c '''connecting the two. This narrow arc 134c '''
The circular portion 134c 'defined by is used not only for transmitting the detection light but also as a positioning hole (a determining hole) when the minute hand wheel 134 is assembled.

In the hour wheel 136, the large-diameter gear 136a is formed with 40 teeth, and a cylindrical hour hand pipe 136p is integrally mounted at the center of the large-diameter gear 136a. The minute hand pipe 134p is inserted. The hour hand pipe 136p is connected to the lower case 1
1 is rotatably supported by being inserted through a bearing hole 111 a formed in the lower case 111.
, And protrudes toward the dial 201 of the timepiece, and an hour hand 204 is attached to the tip of the watch.

As shown in FIG. 14, the hour hand 136 has a second hand wheel 123, a first fifth wheel 122,
Three arc-shaped through holes 136c, 136d, 13 elongated in the circumferential direction in an area overlapping the third wheel 133 and the minute wheel 134.
6e are formed. The arc-shaped through-hole 136c and the arc-shaped through-hole 136d are formed at a central angle α8 of 45 ° and are separated from each other, and the arc-shaped through-hole 136d and the arc-shaped through-hole 136e are
The arc-shaped through hole 136e and the arc-shaped through hole 136c are formed at a central angle α10 of 60 ° and are separated by 60 °.
0 °, and furthermore, arc-shaped through holes 136 are formed.
The length of c, 136d, 136e is the central angle β1 + β2,
β3 and β4 are set to be 75 °, 60 °, and 90 °, respectively. That is, the narrowest light-shielding portion C is formed between the arc-shaped through-hole 36e and the arc-shaped through-hole 136c, and between the arc-shaped through-hole 136c and the arc-shaped through-hole 136d than the light-shielding portion C. A light-shielding portion D having a larger width is formed, and a light-shielding portion E wider than the light-shielding portion D is formed between the arc-shaped through holes 136d and 136e.

The arc-shaped through hole 136c has a circular portion 136 located at a central angle β1 of 7.5 ° from one end side.
c ′, a wide arc portion 136c ″ extending from the other end side,
Both are connected and formed by narrow arc portions 136c '''located on both sides of the circular portion 136c'.
The circular portion 136c ′ defined by the narrow circular arc portion 136c ′ ″ is used not only for transmitting the detection light but also as a positioning hole (a determining hole) when the hour wheel 136 is assembled.

The minute wheel 135 has a large-diameter gear 135a having 42 teeth and a small-diameter gear 135b having 10 teeth, and is rotatable with respect to a projection 111b formed on the lower case 111. The large-diameter gear 135a meshes with the small-diameter gear 134b formed on the minute hand pipe 134p,
Further, the small-diameter gear 135b meshes with the hour wheel 136 (136a) to reduce the rotation of the minute wheel 134 to reduce the rotation of the hour wheel 136.
To communicate.

As shown in FIG. 2, the light detection sensor 140 is a circuit board 141 fixed to the wall of the upper case 112.
Light-emitting element 142 comprising a light-emitting diode mounted on
And lower case 1 so as to face light emitting element 142.
11 and a light receiving element 144 composed of a phototransistor mounted on a circuit board 143 fixed to the wall surface. The anode of the light emitting element 142 is connected to the other end of the resistance element R ₄ in the drive circuit 18 having one end connected to the collector of the pnp transistor Q _2, the cathode is grounded, the light receiving element 144
Connected to the emitter. The collector of the light receiving element 144 is connected to the control circuit 14. Connecting lines between the control circuit is adapted to the output line to the control circuit 14 of the detection signal DT _1, the output line, the resistor element R
₅ is connected to the supply line of the power supply voltage V _CC . The emitter of the transistor Q ₂ of the driving circuit 18 is connected to the supply line of the power supply voltage V _CC, the base is connected to the output line of the drive signal DR ₂ via the resistor element R _3. That is, the light emitting element 142 is
4 is connected to the drive circuit 18 so as to emit light when a low-level drive signal DR ₂ is output from the drive circuit 18.

Further, as shown in FIG. 3, the first
, The fifth wheel 122, the second wheel 123, the third wheel 133, the minute wheel 134, and the hour wheel 136 are all located at the same time. Then, the through hole 122 of the first fifth wheel & pinion 122
c, through hole 133c of the third wheel & pinion 133, through hole 123c of the second hand wheel 123, and through hole 134c of the minute hand wheel (134d, 134).
e), the through holes 136c (136d, 136) of the hour wheel 136.
When e) overlaps, the detection light emitted from the light emitting element 142 is received by the light receiving element 144, and outputs that the second hand, the minute hand, and the hour hand are pointing to the hour and the like.

Further, the light emitting element 142 is
2 is disposed in a mounting recess 112c as a first arranging portion formed so as to open to the outside of the second mounting recess 112c, and a bottom surface of the mounting recess 112c has a circular through hole 112d having a predetermined diameter.
Is open. Since the circular through-hole 112d has a property that the detection light emitted from the light emitting element 142 expands in a divergent shape, the circular through hole 112d blocks the light in the expanded portion and allows only the converged light to pass through to prevent erroneous detection. It is to be. Similarly, the light receiving element 144 is connected to the lower case 11.
1 is provided in a mounting recess 111c as a second placement portion formed so as to open to the outside of the mounting recess 1, and a circular through hole 111d having a predetermined diameter is formed on the bottom surface of the mounting recess 111c.
Is open. The circular through hole 111d allows only light emitted from the light emitting element 142 and passing through the through hole to pass as much as possible, thereby preventing erroneous detection.

When assembling the first fifth wheel 122, the third wheel 133, the second hand wheel 123, the minute hand wheel 134, and the hour hand wheel 136, predetermined positioning pins are used for positioning the circular through hole 111 d of the lower case 111. Assembling is performed sequentially so as to penetrate the respective through holes used and the circular through hole 112d of the upper case 112. After the upper case 112 and the lower case 111 are joined and integrated, the positioning pin is pulled out, and the light emitting element 142 is mounted in the mounting recess 112c where the through hole 112d is located.
The light receiving element 144 is mounted in the mounting recess 111c where 1d is located.

Thus, the through holes 112d and 111d
d is completely closed, and the upper case 112 and the lower case 11
External light can be prevented from entering the internal space defined by 1. Therefore, erroneous detection due to intrusion of external light can be prevented, and since the positioning hole at the time of assembly and the through hole for light detection are also used, compared to the case where these holes are separately provided. The apparatus can be centralized and downsized.

As shown in FIGS. 2 and 3, the manual correction system 150 includes a minute wheel 135 that meshes with the small-diameter gear 134b of the minute hand wheel 134 and the large-diameter gear 136a of the hour hand wheel 136. A manual correction shaft 151 having a gear 151a meshing with the large diameter gear 135a of the reverse wheel 135. The manual correction shaft 151 is connected to the upper case 1
12, a head 151b to which a user can directly touch a finger, and a projection formed in the lower case 111 through the opening 112e formed in the upper case 112 and extending from the head 151b. A gear 151a is formed in a lower region of the pillar 151c.

The manual correction shaft 151 is configured to rotate in the same phase as the minute hand wheel 134. When the minute hand wheel 134 is driven by the above-described second drive system 130, the manual correction shaft 151 passes through the minute wheel 135. When the second drive system 130 is not operated, the head 151 rotates in phase with the minute hand wheel 134.
By rotating b with a finger, the pointer position can be manually corrected.

As described above, the second hand shaft 12 of the second hand wheel 123
3b is inserted into the minute hand pipe 134p of the minute hand wheel 134,
Since the minute hand pipe 134p of the minute hand wheel 134 is inserted through the hour hand pipe 136p of the hour hand wheel 136, the second hand wheel 1
23, the minute hand wheel 134, and the hour hand wheel 136 share a common rotation center axis.
The second hand is driven to rotate once every 60 seconds, the minute hand is rotated once every 60 minutes, and the hour hand is rotated once every 12 hours.

As shown in FIG. 15, a first index for positioning that extends with a predetermined width in the radial direction is provided at the tip of the minute hand pipe 134p of the minute hand wheel 134 and the tip of the hour hand pipe 136p of the hour hand wheel 136. And a groove 136g as a second index. The grooves 134g and 136g are set to indicate a predetermined time, for example, 12:00 when aligned in a straight line.

By providing such positioning indices, the minute hand wheel 134 and the hour hand wheel 136 can be moved to the lower case 111.
And even after being surrounded and covered by the upper case 112, if the grooves 134g and 136g are aligned, it can be understood that it indicates the approximate time set in advance. The hour hand can be easily attached, other alignment and position confirmation steps are not required, and the production time and inspection time on the production line and the inspection line can be reduced. Note that the positioning index is not limited to the above-described groove, and may be a mark such as a spot.

Next, the operation according to the above configuration is performed by the control circuit 1
4, FIG. 17, FIG. 1, and FIG.
8 and FIG.

For example, when the reset / forced reception switch 12 is turned on by the user, various states are returned to the initial state in the control circuit 14 (ST1).
The 4-hour counter 20 is reset (ST2). Further, at this time, when the reset / forced reception switch 12 is turned on, for example, drive power is supplied from the control circuit 14 to the standard radio signal reception system 11, and the forced reception operation of the standard radio signal is performed (ST3). Specifically, in the standard radio signal receiving system 11, the pulse signal S11 corresponding to the receiving state is generated from the long wave receiving circuit 11b, and the control circuit 1
4 is output. The control circuit 14 compares the pulse signal S11 indicating the reception state of the received standard radio signal with a predetermined reference range. As a result, if the reception state is within the reference range, it is determined that reception is possible (time can be set), and the received radio wave is decoded. As a result of the decoding, various counters are controlled based on the basic clock by the oscillation circuit 13, and when the correction switch 30 is not input (ST4) and the time is not over (when time can be set), (ST5), the position of the pointer is detected (ST6), and the fast-forward correction of the pointer for performing the analog display of the time is performed (ST7). In the fast-forward correction of the hands, the second hand stepping motor 121 and the hour / minute hand stepping motor 131 are rotationally driven at fast-forward according to the value of the internal counter, and the hands position is corrected to the time position.

If it is determined in step ST4 that the correction switch 30 has been input, or if it is determined in step ST5 that the time is over, the pointer position is detected (ST8), and step S8 is performed.
The process moves to T9.

Then, in the control circuit 14, the reception state, that is, whether the reception is good and the clocking is possible or not and the reception is bad and the clocking is impossible is set in the reception impossible information register (ST9). . For example, when it is determined that the correction switch 30 has been input,
If the reception is not possible beyond the time and the 24-hour counter 20 overflows, the reception impossible information (logic "1") is set in the reception impossible information register. Good reception information (logic "0") is set.

[0077] If one second has elapsed (ST10), the control circuit 14, the time counter counts up is performed (ST11), further control signal CTL _1, CTL ₂ is a stepping motor for the second hand through the buffer circuit 17 1
It is output to the stepping motor 131 and the hour and minute hands 131 (ST12). The driving signal DR ₁ is output as the light emitting element (LED) 16 performs a flashing operation at all times (ST13). Then, the light / dark detection operation of the CdS sensor 19 is performed (ST14).

Next, it is determined whether or not the correction switch 30 has been input (ST15). If it is determined in step ST15 that the correction switch 30 has not been input, the process proceeds to step ST17 in FIG. On the other hand, when it is determined that the input of the correction switch 30 has been performed, after performing a predetermined button correction operation (ST16), the process proceeds to step ST25 in FIG.

In step ST17, it is determined whether or not it is the preset automatic reception time. If it is determined in step ST17 that the time is not the automatic reception time, the process returns to step ST10 in FIG. On the other hand, if it is determined in step ST17 that the time is the automatic reception time, the reception disable information is set in the reception disable information setting register, and it is determined whether the reception is not possible for more than 24 hours (ST18). ).

In step ST18, if the reception impossible information is set and it is determined that reception is not possible for more than 24 hours, then it is determined whether or not the CdS sensor 19 as the light / dark detection means is off. That is, it is determined whether a dark state is detected (ST19). Step 1
9, when it is determined that the dark state is detected, the control signals CTL1 _, CTL _, which are motor pulse signals, are determined.
₂ is not output and the second hand 202 and the hour / minute hand 203,
04 is stopped (ST20), for example, drive power is supplied to the standard radio signal receiving system 11 to perform an automatic reception operation of the standard radio signal (ST21).

On the other hand, if it is determined in step ST18 that reception is not possible for more than 24 hours, or if it is determined in step ST19 that a dark state has not been detected, the pointer stopping process in step S20 is performed. Instead, the automatic reception process of step ST21 is performed.

At the time of automatic reception, drive power is supplied from the control circuit 14 to the standard radio signal receiving system 11, and the operation of receiving the standard radio signal is performed. Specifically, in the standard radio signal receiving system 11, a pulse signal S11 according to the receiving state is generated from the long wave receiving circuit 11b and output to the control circuit 14.

When the second hand and the hour / minute hand are stopped and reception is being performed, it is determined whether or not a bright state has been detected by the CdS sensor 19 as the light / dark detection means, or whether the second hand 202 and the hour / minute hand 203 have been detected. , 204 are stopped, and as a result, it is determined whether or not reception has failed (reception is impossible and time is over) (ST22). In step ST22, when the CdS sensor 19 does not detect a bright state by the light / dark detection, or when it is determined that the reception has been performed (the time is not over) as a result of stopping the second hand 202 and the hour and minute hands 203 and 204 to perform reception. , The 24-hour counter 20 is reset (ST23). Then, the control signals CTL1 _, CTL
₂ is a stepping motor 121 for the second hand and a stepping motor 131 for the hour and minute hands via the buffer circuit 17.
, The rotation of the hands is controlled by fast-forward, and fast-forward time is performed (ST24).

On the other hand, in step ST22, CdS
A light state is detected by the light / dark detection of the sensor 19, or
As a result of stopping the second hand 202 and the hour / minute hands 203 and 204 and performing reception, if it is determined that reception was not possible (reception is impossible and time is over), the reset operation of the 24-hour counter 20 in step ST23 is not performed, The pointer fast-forward correction process of step ST24 is performed. In this case, as the control signal CTL _1, CTL ₂ is output to the stepping motor 121 and hour and minute hands for the stepping motor 131 for the second hand through the buffer circuit 17, the pointer to follow the current time based on the internal clock at rapid traverse Then, the rotation control is performed, and the fast-forward time correction process is performed.

Then, in control circuit 14, the reception state, that is, whether reception is good and time can be set or whether reception is bad and time cannot be set is set in the reception disabled information register (ST25). The process returns to step ST10 in FIG.

The position detection of the pointer in step ST6 is performed, for example, as shown in FIG. That is, the drive signal DR ₂ is output from the control circuit 14 at the low level of the drive circuit 18. Thus, the transistor Q ₂ is turned on, the light emitting element 142, i.e. light detected from the light-emitting diode is emitted (ST 101). Subsequently, the control signal CTL ₁ is outputted second hand stepping motor 121 is pulse driven (ST 102), the light receiving element 144 i.e. the phototransistor is turned on, the low detection signal DT ₁ from the high level (power supply voltage V _CC level) It is determined whether or not the level has been switched (ST1).
03).

Here, when the detection signal DT ₁ from the phototransistor is held at the high level, every time the number of pulses for performing the step driving is added, the detection signal DT ₁ from the phototransistor is added. Is switched from high level (power supply voltage V _CC level) to low level (ST104 to ST10).
6). Then, the detection signal when the DT ₁ output is not switched from the high level (power supply voltage V _CC level) to a low level, the hour and minute hands for step ping the motor 131 is one step from the phototransistor be reached the number of pulses 9 The pulse is driven (ST107), and then the second hand stepping motor 121 is step-driven again (ST1).
02) The second hand wheel 123 is rotationally driven.

On the other hand, in step ST103,
Signal DT by the transistor ₁ From high level
If it is determined that the level has been switched to the low level, the second hand wheel 12
3 is fast-forwarded (ST108) and the control circuit 14
Comparison with the previously stored output pattern is performed (S
T109). Output pattern and memory obtained as a result of comparison
If the output pattern does not match, the process proceeds to step S
Returning to T108, the second hand wheel 123 is fast-forwarded again.

On the other hand, when the obtained output pattern and the stored output pattern match, at that time (when the level of the detection signal DT ₁ is not switched to the low level by the phototransistor even at the fifth step, the next step). the output of the phototransistor is in turn changed the time) to the low level, the output of the control signal CTL ₁ is stopped, the circuit driving the second hand wheel 123 is stopped. And second hand wheel 12
3 stops at the return-to-zero position (ST110). At this time, the second hand is corrected to a position at a predetermined time, for example, the hour (0 second).

Subsequently, the control signal CTL from the control circuit 14 is output.
₂ is output, only the hour / minute hand step motor 131 is pulse-driven at a predetermined output frequency, and the minute hand wheel 134 is fast-forwarded (ST111). Then, the output pattern from the phototransistor is compared with the output pattern stored in the control circuit 14 in advance (ST112).
As a result of the comparison, if the obtained output pattern does not match the stored output pattern, the process returns to step ST111, and the minute hand wheel 134 is fast-forwarded again.

On the other hand, as a result of the comparison in step ST112,
If the resulting output pattern and the stored output pattern matched, at which time, the control output signal CTL ₂ is stopped, when it minute hand stepping motor 131 is stopped, the minute hand wheel 134 and the hour hand wheel The driving of 136 is stopped (ST113).

The time correction by comparing the output pattern with a previously stored pattern is performed by adjusting the time to one of three types of patterns. That is, as shown in FIG. 19A, the output pattern of the phototransistor by the minute hand wheel 134 is such that two narrow B portions and one wide A portion are alternately set as the OFF width at which the light shielding portion acts. As shown in FIG. 19B, the output pattern of the phototransistor by the hour wheel 136 has three types of OFF widths where the light-shielding portion acts, as shown in FIG. Are alternately appearing at predetermined intervals, and as shown in FIG. 19C, an output pattern obtained by combining the two patterns is a pattern in which the D, B, and A parts are combined, an E part, A pattern in which a part B and a part A are combined and a pattern in which a part C, a part B and a part A are combined appear at predetermined intervals. Note that, among the patterns shown in FIG. 19, the portion of the pattern that is turned on is actually a toothless pattern because there is a portion that is turned off by the light blocking portion of the third wheel 133.

Therefore, when a pattern composed of a combination of the part D, the part B, and the part A is confirmed, for example, at 4:00.
The time when a pattern composed of a combination of the minutes E, E, B and A is confirmed is, for example, 8:00, C, B
If a pattern composed of a combination of the part A and the part A is set in advance as, for example, 12:00, the hour / minute hand stepping motor 131 is stopped when any of these patterns is detected. The minute hand 134 and the hour wheel 136, that is, the minute hand 20
3 and the hour hand 204 can be adjusted to a predetermined time.

The hour / minute hand stepping motor 13
1 is stopped, and the drive signal D
R ₂ is switched to a high level. Thus, the transistor Q ₂ is turned off in the drive circuit 18, light-emitting diode is stopped (ST114), and ends the time adjustment operation.

As described above, in the operation of correcting the hands, the minute hand wheel 134 and the hour hand wheel 136 use the arc-shaped through holes, that is, the long holes as the through holes for allowing the detection light to pass therethrough. Is turned on, the position detection time can be shortened, and as a result, the time for correcting the time of the second hand can be shortened. In addition, since the hour hand wheel 136 is provided with three types of light shielding portions C, D, and E,
The time can be corrected by detecting any one of the three positions, and the position can be detected only by rotating the hour wheel 136 having the slowest rotational speed by approximately 1/3 of the conventional one. The time for correcting the time of the hour hand 204 can be reduced.

As described above, according to the present embodiment, in the automatic correction timepiece which corrects the display time by receiving the time code, the CdS sensor 19 for detecting light and darkness and the time code for a fixed time (in this embodiment, a can not receive more than 24 hours), when the CdS sensor 19 detects a dark condition, the control signal CTL _1, CTL ₂ second hand 202 is not output is a motor pulse signal and hour and minute hands 203, , 204 are stopped, and the control circuit 14 for supplying driving power to the standard radio signal receiving system 11 and performing an automatic reception operation of the standard radio signal is provided, so that the following effects can be obtained. That is, when the reception state is poor, the best reception sensitivity is obtained. In particular, it is effective for motors with large motor pulse noise such as smooth hand movement and continuous hand movement. In addition, there is almost no chance of seeing the state where the hands are stopped, so that there is an advantage that the user does not feel uncomfortable.

In the present embodiment, an example has been described in which the 24-hour counter is provided with the period during which reception is not possible as 24 hours. However, the present invention is not limited to this.
It goes without saying that various embodiments are possible.

[0098]

As described above, according to the present invention,
The influence of noise at the time of driving can be avoided, and when the reception state is poor, the best reception sensitivity can be obtained. In addition, there is almost no chance of seeing the state where the hands are stopped, so that there is an advantage that the user does not feel uncomfortable.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a signal processing circuit of a radio-controlled timepiece with a time function according to the present invention.

FIG. 2 is a cross-sectional view showing an entire configuration of an embodiment of a hand position detecting device of the radio-controlled timepiece with a time notification function according to the present invention.

FIG. 3 is a plan view of a main part of the pointer position detecting device according to the present invention.

FIG. 4 is a front view showing the appearance of the radio-controlled timepiece of FIG. 1;

FIG. 5 is a diagram for explaining a criterion for determining a received radio wave state before a return-to-zero operation in the initial correction mode in the control circuit according to the present invention.

FIG. 6 is a diagram illustrating an example of a time code of a standard time radio signal.

FIG. 7 is a first diagram for driving a second hand which is a part of the self-correcting timepiece.
It is a top view which shows a drive system.

FIG. 8 is a plan view showing a second drive system that drives a minute hand and an hour hand, which are part of an automatic correction timepiece.

FIG. 9 is a plan view showing a first fifth wheel that forms part of a first drive system that drives the second hand.

FIG. 10 is a plan view showing a second hand wheel forming a part of a first drive system that drives the second hand.

FIG. 11 is a plan view showing another example of the second hand wheel forming a part of the first drive system for driving the second hand.

FIG. 12 is a plan view showing a third wheel that forms part of a second drive system that drives the minute hand and the hour hand.

FIG. 13 is a plan view showing a minute hand wheel that forms a part of a second drive system that drives the minute hand and the hour hand.

FIG. 14 is a plan view showing an hour wheel that forms part of a second drive system that drives the minute hand and the hour hand.

FIG. 15 is an end view showing the tips of the minute hand pipe and the hour hand pipe.

FIG. 16 is a flowchart for explaining the operation of the radio-controlled timepiece according to the present invention.

FIG. 17 is a flowchart for explaining the operation of the radio-controlled timepiece according to the present invention.

FIG. 18 is a flowchart for explaining a pointer position correcting operation in the control circuit of the radio-controlled timepiece according to the present invention.

FIG. 19 is a diagram showing an output pattern of a minute hand wheel, an hour hand wheel, and a detecting means based on a combination of the two in a correcting operation.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Signal processing system circuit 11 ... Standard radio wave signal receiving system 12 ... Reset switch 13 ... Oscillation circuit 14 ... Control circuit 15 ... Drive circuit 16 ... Light emitting element (reception state display means) 17 ... Buffer circuit 18 ... Drive circuit 19 ... CdS Sensor (light / dark detection means) 20 24 hour counter 30 Correction switch 100 Watch body 111 Lower case (second case) 111c Mounting recess (second arrangement part) 111d Circular through hole 112 Upper case (first Case) 112c Mounting recess (first arrangement part) 112d Circular through hole 113 Middle plate 120 First drive system 121 Second stepping motor (first drive source) 122 Second fifth wheel (first) Transmission gear, first detection gear) 122c: through hole 123: second hand wheel (second detection gear, first pointer wheel) 123c: through hole 123d Positioning light-shielding portion 123e ... biasing spring 123f ... notch hole 123g ... notch hole 130 ... second drive system 131 ... minute hand system stepping motor (second drive source) 132 ... second fifth wheel 133 ... third wheel ( 133c: through-hole 134: minute hand (fourth detection gear, second pointer wheel) 134c: arc-shaped through hole 134d: arc-shaped through hole 134e: arc-shaped through hole 134g ... groove (first index) 134p ... minute hand pipe 135 ... minute wheel 136 ... hour hand wheel (fifth detection gear, second hand wheel) 136c ... arcuate through hole 136d ... arcuate through hole 136e ... arcuate through hole holes 136 g ... groove (second index) 136p ... hour pipe 140 ... light detecting sensor (detecting means) 142 ... light emitting element 144 ... light receiving element 150 ... manual correction system V _CC ... supply voltage C ₁ -C ₃ ... capacitor _{1 ~R 6} ... resistance element

Claims (4)

[Claims] 1. An automatic correction clock for correcting an analog display time by a hand in response to a time code, a hand driving means for driving a hand in accordance with a control signal, a light / dark detection means for detecting light / dark, If the code cannot be received for more than a predetermined time and the light / dark detector detects a dark state, the control signal is output to the pointer driving means and at least one pointer is stopped. And a control circuit for receiving the time code. 2. The control circuit outputs the control signal to the hand driving means when the light / dark detecting means detects a light state while the hand is stopped and receiving is being performed. 2. The automatic correction timepiece according to claim 1, wherein the pointer is made to follow the current time display in a fast-forward manner. 3. The control circuit outputs the control signal to the pointer driving means and fast-forwards the stopped pointer when reception is not possible as a result of stopping the pointer and performing reception. 3. The automatic correction clock according to claim 1, wherein the automatic correction clock is made to follow a current time display. 4. A reception state setting means for setting reception impossibility information when reception of the time code cannot be performed for more than a predetermined time, wherein the control circuit does not receive the set information in the reception state setting means. Is set, and when the light / dark detection means detects a dark state, the reception is stopped as a result of performing the reception with the hands stopped. Claim 1, which resets
2. The automatic correction watch according to 2 or 3.