JP2001013275A - Automatic correction clock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rapidly correct time by stopping a minute hand wheel and comparing a signal level with a reference level when second and minute hand wheels are in a state of rotating and the detection signal level of a sensor reaches a light reception level, and stopping the minute hand wheel after rotation and then comparing the level when the detection signal level is equal to or less than the reference level. SOLUTION: A control circuit 14 outputs a control signals CTL1 and CTL2, and stops a minute hand wheel 134 when a detection signal DT1 of a photo detection sensor 140 reaches a light reception level while the second and minute hand wheels are at a fast forward state. The detection signal DT1 is compared with a preset reference level. Then, when the former is equal to or less than the latter, the minute band wheel is stopped again when the detection signal DT1 reaches a light reception level while the second and minute hand wheels are in a rapid traverse state, and the detection signal DT1 is compared with the reference level. The above operation is repeated. When the reference level is reached, the second hand wheel is stopped and the minute hand wheel is moved in fast forward, the pattern of the detection signal DT1 is compared with a preset pattern, and the minute hand wheel is stopped according to the result for correcting time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic timepiece that corrects time by receiving a time signal such as an hour signal.

[0002]

2. Description of the Related Art Among radio-controlled timepieces, radio-controlled timepieces using radio waves receive a standard frequency radio wave (JG2AS) of a predetermined frequency emitted from a radio station, for example, a long wave (40 kHz) that transmits Japan Standard Time with high accuracy. Based on the received signal, a so-called zero return is performed. In this case, a pointer position detecting device is provided so that the position of the pointer can be accurately adjusted to the hour or the like.

As a conventional radio-controlled timepiece equipped with this pointer position detecting device, those described in Japanese Patent Application Laid-Open No. 6-222164, Japanese Utility Model Application Laid-Open No. 6-30793, and the like are known. The radio-controlled timepieces disclosed in these publications include a first drive system for rotating a second hand gear, a second drive system for rotating a minute hand gear and an hour hand gear, and a first light reflection type sensor for detecting the position of a second hand. , A second light reflection type sensor for detecting the positions of the minute hand and the hour hand are provided.

The first light reflection type sensor and the second light reflection type sensor are formed by a light emitting element and a light receiving element, respectively, and have detection holes formed respectively in an intermediate gear and an hour wheel constituting a first drive system. The light receiving element receives the light emitted from the light emitting element to detect the pointer position when the light and the light reflecting portions respectively formed on the second hand wheel and the separately provided rotating plate coincide with each other. .

There is also known an optical sensor using a light transmission type sensor instead of the above light reflection type sensor. In a radio-controlled timepiece using this light transmission type sensor, a through-hole is formed in a gear constituting a drive system for driving the second hand and a drive system for driving the minute hand and the hour hand,
The light emitting element and the light receiving element are opposed to each other through the through hole, and when the light emitted from the light emitting element is received by the light receiving element with each through hole facing, the pointer position is detected. .

[0006]

However, the radio-controlled timepiece provided with the above-described pointer position detecting device has the following problems. That is, when the light detection sensor corresponding to the drive system for driving the second hand and the light detection sensor corresponding to the drive system for driving the minute hand and the hour hand are separately provided as the light detection sensors, the light detection sensor 2
Space is required, the equipment becomes larger,
There was a problem that the cost was high.

[0007] Further, in the case where an attempt is made to unify the photodetection sensor in a state where two driving systems are provided, the pointer is driven 2
When the motors etc. of the two drive systems rotate each other due to impact or other external factors, causing a phase shift, it is necessary to adjust their phases, and as a result, the position of the pointer is detected There was a problem that the time to do was long. Further, when the conventional detection holes are provided, there is a problem that it takes time until all the detection holes coincide with each other, and similarly, it takes a long time to detect the position of the pointer.

Further, when a light transmission type sensor is used as the light detection sensor, the distance between the light emitting element and the light receiving element becomes longer, and the light emitted from the light emitting element becomes divergent. There is also a problem that detection is easily caused.

Further, after assembly, a hole is formed in the case so that a mark or the like engraved on the gear housed therein can be checked so that the approximate time can be understood. There is a problem that dust or the like invades, and external light invades, causing erroneous detection.

The present invention has been made in view of the above circumstances, and has as its object to reduce the size and cost of an apparatus, and to perform automatic time correction with high accuracy and speed. To provide a clock.

[0011]

In order to achieve the above-mentioned object, the present invention provides an automatic correction timepiece which, upon receiving a time signal, initializes a pointer position and corrects the pointer position to a position corresponding to an input time signal. A first drive source that operates in response to a first control signal, a first transmission gear that is rotationally driven by the first drive source, and a first transmission gear that meshes with the first transmission gear.
A pointer wheel, a second drive source that operates in response to a second control signal, a second transmission gear that is rotationally driven by the second drive source, and a second pointer wheel that meshes with the second transmission gear. A third pointer wheel that is driven to rotate in conjunction with the second pointer wheel, wherein the first transmission gear, the first pointer wheel, the second transmission gear, the second pointer wheel, and the third pointer wheel are: At least one through-hole is formed, and any one of the formed through-holes is arranged so as to be overlapped with each other, and the first transmission gear, the first pointer wheel, and the second transmission gear are provided. A light emitting element that emits detection light to a region where any one of the through holes can overlap with the second, third, and third pointer wheels, and an overlap of the through hole in the light emitted from the light emitting element. Arranged at a position that can receive light that has passed through all through holes in the area Is a transmission type optical sensor having a light receiving element for outputting a detection signal corresponding to the received light level,
At the time of initial setting of the pointer position, the first and second control signals are output, and the level of the detection signal by the light detection sensor changes the detection light while the first and second pointer wheels are rotated. When the level is switched to a level indicating that light has been received, the output of the second control signal is stopped and the second control signal is output.
In a state where the pointer wheel is stopped, it is determined whether or not the level of the detection signal has reached a preset reference level. If the detection signal level has not reached the reference level, the second pointer wheel is rotated again. And a control means for comparing the detection signal with the reference level in a state where the second hand wheel is stopped.

The present invention is also an automatic timepiece which, upon receipt of a time signal, initializes a hand position and corrects the hand position to a position corresponding to an input time signal, and receives a first control signal. A plurality of through-holes and a plurality of light shielding portions alternately arranged in the circumferential direction are provided, and the plurality of light shielding portions are the same in the circumferential direction. And a plurality of through holes and a plurality of light shielding portions that mesh with the first transmission gear and are alternately arranged in the circumferential direction, and the plurality of through holes are rotatable. The first detection gear is formed so as to overlap with any of the plurality of through holes formed at the time of driving, and one of the plurality of light shielding portions is formed.
The first light-shielding portion is formed so that the width in the circumferential direction is different from the width of the other light-shielding portions, a second drive source that operates in response to a second control signal, and the second drive source. A plurality of through-holes and a plurality of light-shielding portions alternately arranged in the circumferential direction are provided, and the plurality of light-shielding portions are formed to have the same width in the circumferential direction; and
A plurality of arcuate through-holes and a plurality of light-shielding portions meshed with the second transmission gear and arranged alternately in the circumferential direction are provided, and the plurality of arcuate through-holes are provided when the second transmission gear is rotated during driving. And one of the plurality of light-shielding portions is formed such that the width in the circumferential direction is different from the width of the other light-shielding portions. A plurality of arc-shaped through holes and a plurality of light-shielding portions, which are rotationally driven in conjunction with the second pointer wheel and are alternately arranged in the circumferential direction, and are provided with the plurality of arc-shaped through holes. Is formed so as to overlap with any of the plurality of through holes formed in the second transmission gear during the rotation drive, and at least two of the plurality of light shielding portions have other widths in the circumferential direction. Each against the light-shielding part And the third transmission wheel, the first transmission wheel, the second transmission gear, the second transmission wheel, and the third transmission wheel. The first transmission gear, the first pointer wheel, the second transmission gear, the second pointer wheel, and the third pointer wheel are disposed so that any one of them can overlap each other. A light-emitting element that emits detection light to a region where any one of the light-emitting elements can overlap each other, and a light-emitting element disposed at a position where light emitted from the light-emitting element can receive light that has passed through all of the through-holes in the through-hole overlapping region. A transmission type light detection sensor having a light receiving element for outputting a detection signal in accordance with a light receiving level; and outputting the first and second control signals at the time of initial setting of the pointer position, thereby outputting the first pointer. Light while rotating the car and the second pointer wheel When the level of the detection signal from the output sensor is switched to a level indicating that the detection light has been received, the output of the second control signal is stopped, and the second hand wheel is stopped. It is determined whether or not the level of the detection signal has reached a preset reference level. If the level has not reached the reference level, the second pointer wheel is rotated again, and then the second pointer wheel is rotated. And control means for comparing the detection signal with the reference level in a state where is stopped.

Further, in the present invention, the control means rotates the first and second pointer wheels until the level of the detection signal reaches the reference level, and then stops the second pointer wheel. The process of comparing the detection signal with the reference level is repeated in this state. For example, the first hand wheel is a second hand wheel, the second hand wheel is a minute hand wheel, and the third hand wheel is a third hand wheel.
The pointer wheel is an hour hand wheel.

Further, in the present invention, when the level of the detection signal reaches the reference level, the control means stops the first hand wheel, outputs the second control signal, and controls the second hand wheel. The second driving wheel is driven to rotate, the pattern of the detection signal is compared with a predetermined pattern, and the second hand wheel is stopped according to the comparison result to correct the time.

Further, according to the automatic timepiece of the present invention, at the time of initial setting, the first and second control signals are output by the control means, and the first and second hands are rotated. Then, in this state, it is determined whether or not the level of the detection signal by the light detection sensor has been switched to a level indicating that the detection light has been received. In a state where the output is stopped, the second hand wheel is stopped, and only the first hand wheel is rotated, it is determined whether or not the level of the detection signal has reached a preset reference level. If the level of the detection signal has not reached the reference level, the first and second pointer wheels are rotated again, and then the detection signal and the reference level are kept in a state where the second pointer wheel is stopped. Is compared.
It should be noted that each of the above processes is repeated until the level of the detection signal reaches the reference level. When the level of the detection signal reaches the reference level, the first pointer wheel is stopped. Then, the second control signal is output and the second pointer wheel is driven to rotate, the pattern of the detection signal is compared with a predetermined pattern, and the second pointer wheel is stopped according to the comparison result. Then, the time is adjusted.

[0016]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a block diagram showing an embodiment of a signal processing system circuit of a radio-controlled timepiece as an automatic correction timepiece according to the present invention, and FIG. 2 is an embodiment of a hand position detecting device of a radio-controlled timepiece according to the present invention. FIG. 3 is a cross-sectional view showing the entire configuration, and FIG. 3 is a plan view of a main part of a pointer position detecting device of the 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 receiving system, 12 is a reset switch, 13
Is an oscillation circuit, 14 is a control circuit, 15 is a drive circuit, 1
6 is a light emitting element as a notification means, 17 is a buffer circuit,
18 is a drive circuit, V _CC is a power supply voltage, C _{1 to} C ₃ are capacitors, R _{1 to} R ₅ are resistance elements, 100 is a 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-transmitting light detection sensor, and 150 is a manual correction by which the user directly sets the time by hand. Each system is shown.

The standard radio signal receiving system 11 receives the receiving antenna 11a and a long wave (for example, 40 kHz) including a time code signal transmitted from, for example, a key station, performs predetermined signal processing, and generates a pulse signal S11 as a control circuit 14. 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 a form as 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 according to the presence or absence of 40 kHz as shown in FIG. 4B.

FIG. 5 shows an example of the time code of the standard time radio signal. The current Japanese long wave standard radio wave is experimentally transmitted from Miwa Town, Ibaraki Prefecture under the operation of the Communications Research Laboratory (CRL) of the Ministry of Posts and Telecommunications. It is an accumulated date from the date.

The time data is transmitted at one bit / second and one minute is defined as one frame. In this frame, the information of the minute, hour, and integrated date from January 1 is provided in the form of a 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, a description will be given of a long-wave standard radio wave which is formalized in 1999.

The Japanese standard radio wave is currently an experimental station as described above.
It will be officially launched in the year. With this. In addition to the current (experimental station) transmission data, the last two digits, day, minute parity,
Time parity, spare bits to be used when daylight saving time is introduced, and leap seconds are added (see FIG. 5A).
Further, at 15 minutes and 45 minutes each hour, wave stop information for interrupting the transmission of radio waves was also added (see FIG. 5B). The data transmission method is the same as the current method, that is, the point that one frame is set to one minute at 1 bit / sec. 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.

[0025]

[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, "a negative leap second (deleted) within one month", that is, one minute is 59 seconds, and LS = LS =
1, the information format is such that "a positive leap second (insertion) occurs within one month", that is, one minute is 61 seconds.
The timing of leap second correction has already been determined and U
It is to be performed immediately before January 1 or July 1 of the TC time. Therefore, in Japan time (JTC), 1
It will be held just before 9:00 am on the 1st of the month or on the 1st of July.

[0027]

[Table 2]

The wave stop 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
In T5 = 1 and ST6 = 0, "The wave stops within 2 to 6 days. S
At T5 = ST6 = 1, it is “waves stop in less than 2 days”.

[0029]

[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. , Stop information is also included in the transmission information.

The reset switch 12 is turned on when returning various states of the control circuit 14 to the initial state. When the reset switch 12 is turned on or when a battery (not shown) is set, the radio-controlled timepiece enters the initial correction mode.

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).
For example, in the initial correction mode, the standard radio signal receiving system 1
1 receives the pulse signal S11, compares the reception state of the received standard radio signal with a predetermined reference range, and when the reception state is within the reference range, the control signal C
TL _1, CTL ₂ output, etc. to the pointer position initialization to the stepping motor 131 of the stepping motor 121 and hour and minute hands for the second hand through the buffer 17, namely to perform the zero-reset operation, the reception state is within the reference range If not, the without outputting a control signal CTL _1, CTL _2, drive signal DR ₁ and outputs to the drive circuit 15, radio reception is hardly to users by the light emitting element 16 as a notification means Let them know. Further, when the receiving state is within the reference range, after performing the zero-return operation, the received radio signal is decoded, and as a result of the decoding, if the time can be set, the base clock by the oscillation circuit 13 is used. Based on the count control of various counters and the input level of the detection signal DT _{1 from} the light detection sensor, the control signals CTL _{1 and} CTL ₂ are supplied via the buffer 17 to the stepping motor 121 for the second hand and the stepping motor 131 for the hour and minute hands. To perform the time correction control by performing the 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 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 zero-return operation in the initial correction mode is performed. Specifically, the received radio signal is decoded, and as a result of the decoding, if time can be set, count control of various counters based on the basic clock by the oscillation circuit 13 and detection signal DT by the light detection sensor 140 are performed. ₁ according to the input level.
Performing time correction control by controlling the rotation is output to the stepping motor 121 and hour-minute stepping motor 131 of the needle for the second hand through the TL _1, CTL ₂ buffer 17. 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 To notify the user that the radio wave reception is not good.

In the above description, when it is determined that the reception state is outside 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.

Further, the control circuit 14 outputs control signals CTL ₁ and CTL ₂ at the time of the zero-return operation at the time of time correction, and quickly moves the second hand wheel 123 and the minute hand wheel 134 to return.
When the level of the detection signal DT ₁ by the light detection sensor 140 is switched to a level indicating that the detection light has been received, the detection signal DT ₁ is stopped in a state where the minute hand wheel 134 is stopped and the second hand wheel 123 is quickly advanced. It is determined whether or not the level has reached the preset reference level. If the level has not reached the reference level, the second hand wheel 123 and the minute hand wheel 134 are fast-forwarded again and the light detection sensor 1
When the level of the detection signal DT ₁ is switched to a level indicating that the detection light has been received, the minute hand 13
4 is stopped and the second hand wheel 123 is fast-forwarded, and each process of determining whether the level of the detection signal DT ₁ has reached the reference level is performed until the level of the detection signal DT ₁ reaches the reference level. repeating, if reaches the reference level, by fast-forwarding the center wheel 134 in the state where the seconds wheel 123 is stopped, by comparing the predetermined pattern with the pattern of the detection signal DT _1, according to the comparison result The minute hand 134 (and the hour hand 136) is stopped to correct the time.

The drive circuit 15 comprises a pnp transistor Q1 and resistance elements R ₁ and R ₂ .
The base of transistor Q1 is connected to the output line of the drive signal DR ₁ of the control circuit 14 via the resistance element R _1, is connected to the cathode of the light emitting device 16 comprising a light emitting diode collector through the resistance element R _2, the emitter _Are connected to the supply line of the power supply voltage V _CC . And
The cathode of the light emitting element 16 is grounded. That is,
The light emitting element 16 is connected to the drive circuit 15 so as to emit light when a low level drive signal DR ₁ is output from the control circuit 14.

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

The watch body 100 has a lower case 111 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 6, the first drive system 120 includes a substantially U-shaped stator 121a, a drive coil 121b wound on one leg of the stator 121a, A second-hand stepping motor 121 constituted by a rotor 121c rotatably arranged between the other magnetic poles of the stator 121a;
A first fifth wheel 122 as a first transmission gear in which a large-diameter gear 122a meshes with a pinion 121c 'of the second wheel, and a second hand wheel as a first pointer wheel meshing with a small-diameter gear 122b of the first fifth wheel 122 123. Here, the second hand stepping motor 121 is
1a is mounted and fixed on the middle plate 113, and the rotor 121c
Are supported by the middle plate 113 and the upper case 12, and the rotation direction, the rotation angle, and the rotation speed are controlled based on the output control signal CTL ₁ of the control circuit 14.

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. 8 and 10, 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. 9, the second hand wheel 123 has eleven circular shapes arranged at equal intervals in the circumferential direction (center angle α2 is 30 °) in a region overlapping with the fifth wheel & pinion 122 by rotation. And a positioning light-shielding portion 123d having a different pitch only at one position (a through hole 123c and a through hole 123c).
(a central angle with c is 60 °). And
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 separated from each other. 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. 9, instead of providing a plurality of (11) through holes 123c,
As shown in FIG. 10, the other through holes 123 c are notched, except for the through hole 123 c which is located at a position radially opposed to the positioning light shielding portion 123 d.
It may be opened integrally with 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 7, 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 The third car 133 as this and this 3
A minute hand 134 as a second hand wheel in which a large-diameter gear 134a meshes with a small-diameter gear 133b of a center wheel 133, and a minute wheel as an intermediate gear in which a large-diameter gear 135a meshes with a small-diameter gear 134b of the minute wheel 134. 135 and the minute wheel 1 of this day
An hour hand wheel 136 as a third hand wheel meshed with the 35 small-diameter gear 135b. Here, the hour / minute hand stepping motor 131 has a stator 131a mounted and fixed on the middle plate 113, and a rotor 131c fixed to the middle plate 1
13 and the upper case 112, and its rotation direction, rotation angle and rotation speed are controlled based on the output control signal of the control circuit.

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 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 center. 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. 10, 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 a shaft on the other end is rotatably inserted into an hour hand pipe 136 p of an hour wheel 136 described later. In addition, minute hand 1 pipe 34p
Projects through the lower case 111 toward the dial 201 of the timepiece, and has a minute hand 203 attached to the end thereof.

As shown in FIG. 12, the second hand wheel 134, the 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 134c 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 has 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. 13, the hour hand wheel 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.
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 includes a light emitting element 142 composed of a light emitting diode mounted on a circuit board 141 fixed to the wall surface of the upper case 12.
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.
, 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 provided in the upper case 11
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, the predetermined positioning pins are used for positioning the circular through hole 111d 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 134 b of the minute hand wheel 134 and the large-diameter gear 136 a 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 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. 14, a first index for positioning extending in 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 time correction operation of the radio-controlled timepiece will be described. FIG. 15 is a flowchart illustrating an example of the time adjustment operation. Here, the first fifth wheel 122, the second wheel 123, the third wheel 133, the minute wheel 134, and the hour wheel 13
Reference numeral 6 denotes a second hand stepping motor 121 and an hour / minute hand stepping motor 1 controlled by the control unit.
It is rotationally driven by the 31 step drive. At this time, the first fifth wheel 122 is a second-hand stepping motor 121.
Is controlled so as to make one rotation in 15 steps, and as a result, the second hand wheel 123 makes one rotation in 60 steps. On the other hand, the third wheel 133 is driven and controlled by the step driving of the hour / minute hand stepping motor 131 so as to make one rotation in 60 steps. As a result, the minute wheel 134 makes one rotation in 360 steps and the hour wheel 136 becomes 4320. Make one rotation in steps. In this case, the first fifth wheel 122 is driven by the second hand
Each time the stepping drive is performed, the detection light is passed once.
The third wheel 133 allows the detection light to pass once every six steps driven by the hour / minute hand stepping motor 131.

First, when the reset switch 12 is turned on or at a predetermined reception time, for example, drive power is supplied from the control circuit 14 to the standard radio signal reception system 11, and the standard radio signal is received. In the standard radio wave signal receiving system 11, a pulse signal S11 corresponding to the receiving state is generated from the long wave receiving circuit 11b and output to the control circuit.

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, when the reception state is within the reference range, the zero-return operation is performed, and the received radio signal is decoded as being receivable. As a result of decoding, if time can be set, count control of various counters is performed based on the basic clock by the oscillation circuit 13, and fast-forward correction of the hands is performed.

That is, the drive signal DR ₂ is output from the control circuit 14 to the drive circuit 18 at a low level.
Thus, as shown in FIG. 15, the transistor Q ₂ is turned on, the light emitting element 142, i.e., the detection light emitted from the light emitting diode (ST1). Subsequently, the control circuit 1
4 control signals are output CTL ₁ and the control signal CTL ₂ from the second hand stepping motor 121 and hour and minute hands stepping motor 131 is pulse-driven at the same frequency at the same time, the seconds wheel 123 and the minute hand wheel 134 (and the hour hand wheel 136) is rotationally driven at fast-forward (ST)
2). Then, in the control circuit 124, each of the first fifth wheel 122, the second wheel 123, the third wheel 133, and the minute wheel 13
4 and the through holes formed in the hour wheel 136 overlap each other, and the detection light emitted from the light emitting diode 142 reaches the light receiving element 144, that is, the phototransistor.
Phototransistor is turned on, the detection signal DT ₁ is determined whether switched from the high level (power supply voltage V _CC level) to the low level is performed (ST3).

[0070] In step ST3, the when the detection signal DT ₁ from the phototransistor will not be switched in the Lobel, the second hand wheel 123 the output of the control circuit 14 the control signal CTL ₁ and the control CTL ₂ is stopped, and the minute hand wheel The rotation of 135 (and hour wheel 136) is temporarily stopped (ST4). Then, the control circuit 14 outputs the control signal CTL ₁ for one pulse, and the second hand wheel 123
After the rotation, the process returns to step ST2, and the second hand stepping motor 121 and the hour / minute hand stepping motor 131 are pulse-driven again to rotate the second hand wheel 123 and the minute hand wheel 134 (and the hour hand wheel 136).

On the other hand, if it is determined in step ST3 that the detection signal DT ₁ from the phototransistor has been switched to the low level, the output of the control signal CTL ₁ and the control CTL ₂ is stopped, and the second hand wheel 123 and The rotation of the minute hand wheel 134 (and the hour hand wheel 136) is stopped (ST6). However, it is determined that the DT ₁ is switched to the low level, there are two cases to be described below, and performs the determination in ST8. That is, the control signal CTL ₁ is output from the control circuit 14 and the second hand wheel 1
23 is fast-forward driving (ST7), and the level of the detection signal DT ₁ with a predetermined reference level is compared, and if the through holes to each other in step ST3 if match is determined that exactly matches or, is compared with the level with a predetermined reference level of the detection signal DT ₁ is, if matched, the amount of light receiving element 144 is sufficiently turned on without exact match to each other each through hole is obtained However, it is determined that the intermediate level between the sufficient low level and the level at which the level is switched from the high level to the low level is turned on. (ST8)

Here, in step ST8, the above-mentioned two types of determination will be described in detail. As shown in FIG. 8 and FIG. 9, the through holes of the second hand wheel 123 and the fifth wheel & pinion 122 completely coincide with each other on a concentric circle of light transmission, or are in a completely shielded state where there is no halfway overlap between the holes. It is designed to be. In other words, the rotation angle per step of the fifth wheel & pinion 122 is large, and plays the role of a shutter for the through hole of the second hand wheel 123. It is turned on at intervals of 10 steps just before zero. On the other hand, the through hole of the minute hand wheel 134 and the third wheel 1
Due to the reduction ratio of each other, there are also cases where the holes are concentric with each other and overlap each other at a half end. In step ST3, the output of the light receiving element 144 is obtained when the respective holes overlap each other in a semicircle. If the level does not reach the low level completely and the intermediate level at which the high level is switched to the low level happens to be determined to be the low level, the minute hand wheel 134 is stopped and the second hand wheel 123 is fast-forwarded in step ST8. and an output and a preset reference level of the detection signal DT ₁ in the state as compared predetermined period, does not match the reference pattern level pattern is preset at that time, at step ST3, the holes each other and odd match It is determined that the intermediate level is low level, that is, it is determined to be on. At that time, the process returns to step ST2, where the second hand wheel 123 and the minute hand wheel 134 are fast-forwarded, and the through holes completely overlap each other. At step ST8, the detection signal DT _{1 is obtained.}
This operation is repeated until the output pattern of step (1) matches the reference pattern. At this time, the second hand wheel 123 is driven to the home position and stopped, and the second hand is corrected to a position at a predetermined time, for example, the hour (0 second).

Subsequently, the control circuit 14 outputs the control signal CTL ₂ to the hour / minute hand step motor 13.
Only 1 is pulse-driven and the minute hand wheel 134 is rapidly advanced (ST10). Then, the output pattern from the phototransistor is compared with the output pattern stored in the control circuit 14 in advance (ST11). As a result of the comparison, if the obtained output pattern does not match the stored output pattern, the process returns to step ST10,
The minute hand wheel 134 is driven forward.

[0074] On the other hand, the result of the comparison of step ST11, if the resulting output pattern and the stored output pattern matched, at that time, is the output of the stop control signal CTL _2, when the stepping motor for minute hand 131 is stopped, and the drive of the minute hand wheel 134 and the hour hand wheel 136 is stopped (ST12).

Here, 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. 16A, the output pattern of the phototransistor by the minute hand wheel 134 has two narrow B portions and one wide A portion alternately as the OFF width at which the light shielding portion acts. Is a pattern that appears in The output pattern of the phototransistor by the hour wheel 36 is
As shown in FIG. 16B, a pattern in which three types of D portion, E portion, and C portion alternately appear at predetermined intervals with the off width at which the light shielding portion acts, and an output pattern obtained by combining the two. As shown in FIG. 16 (c), a pattern in which the D portion, the B portion and the A portion are combined, and the E portion, the B portion and the A
A pattern in which three types, that is, a pattern in which the parts are combined and a pattern in which the parts C, B, and A are combined, appears at predetermined intervals.

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: 0
0 minute, when a pattern composed of a combination of the E section, the B section, and the A section is confirmed, for example, at 8:00, the C section, the B section,
If the time when a pattern composed of a combination of the part A and the part A is confirmed 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 and the hour hand 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 drive circuit 18 is turned off, light-emitting diode (light emitting element 142) is stopped (ST1
3), the time adjustment operation ends.

According to the radio-controlled timepiece performing the above operation, the first fifth wheel & pinion 122 driven by the second hand stepping motor 121 and the hour / minute hand stepping motor 1
In the third wheel 133 driven by 31, the intervals at which the detection light of the light detection sensor 140 passes are odd and even with the number of output pulses of the motors 121 and 131. The relationship has no common divisor.

Therefore, relative rotation occurs between the second hand stepping motor 21 and the hour / minute hand stepping motor 131 due to an external factor such as an impact after assembling. Even if the motor 121 and the hour / minute hand stepping motor 131 are driven to rotate at the same time, there always exists a position where the phases match (a position where the output of the light detection sensor is turned on).

For example, when the third wheel 133 is displaced, the first fifth wheel 122 outputs the pulse number of the second hand stepping motor 121 every five pulses, that is, 0, 5, 1
0, 15, 20, 25, 30,..., The detection light passes through each pulse, while the third wheel & pinion 33 shifts by one pulse,
7, 13, 19, 25, 31... The detection light passes through each pulse, and when there is a shift of 2 pulses, 2, 8, 14, 20,.
26, 32... Detected light passes through every pulse, 3, 9, 15, 15, 21, 27, 33... Detected light passes through every pulse, 4, 10, 4 1
6, 22,... The detection light is transmitted every pulse, and when there is a shift of 5 pulses, the detection light is transmitted every 5, 11,. In this case, 25 pulses when shifted by 1 pulse, 20 pulses when shifted by 2 pulses, 15 pulses when shifted by 3 pulses,
When four pulses are displaced, the phases of both pulses coincide at 10 pulses and when five pulses are displaced, five pulses.

On the other hand, when the first fifth wheel & pinion 122 is displaced, the third wheel & pinion 133 has the number of pulses of the hour / minute hand stepping motor 131 every six pulses, that is, 0, 6, 12,
18, 24, 30,... The detection light passes through each pulse, while the first fifth wheel & pinion 122 shifts by 1 pulse,
6, 11, 16, 21, 26... The detection light passes through each pulse, and when there is a shift of 2 pulses, 2, 7, 12, 17,.
22, 27... Detected light is transmitted every pulse, 3, 8, 13, 13, 18, 23, 28... Detected light is transmitted every pulse, 4, 9, 4 14,
19, 24, 29... The detection light passes through each pulse, and when there is a shift of 5 pulses, 5, 10, 15, 20, 25, 30,.
・ The detection light is transmitted for each pulse. In this case, 6 pulses when shifted by 1 pulse, 12 pulses when shifted by 2 pulses, 3 pulses
When the pulses are displaced, the phases of the two pulses coincide at 18 pulses, when the pulses are displaced by 24 pulses, when the pulses are displaced by 5, 30 pulses.

That is, since the positioning of the second hand and the positioning of the minute hand and the hour hand can be performed by simultaneously driving the two motors 121 and 131, the time required for time correction as a whole can be shortened.

As described above, according to the present embodiment, the control signals CTL ₁ and CTL ₂ are output during the zero-return operation at the time correction, and the second hand wheel 123 and the minute hand wheel 134 are rapidly advanced. Detection signal DT ₁ by light detection sensor 140
Is switched to a level indicating that the detection light has been received, the minute hand wheel 134 is stopped and the second hand wheel 12 is stopped.
In the state in which 3 is fast-forwarded, it is determined whether or not the level of the detection signal DT ₁ has reached a preset reference level. When the level of the detection signal DT _{1 from} the light detection sensor 140 is switched to a level indicating that the detection light has been received in the fast-forwarding state, the minute hand wheel 134 is stopped and the second hand wheel 123 is fast-forwarded. in, it is determined whether or not the level of the detection signal DT ₁ reaches the reference level, again if not, returns to step ST2, the repeating the processes, to the level of the detection signal DT ₁ reaches the reference level If the reference level is reached, the minute hand wheel 134 is stopped with the second hand wheel 123 stopped.
It was allowed to fast-forward, by comparing the predetermined pattern of the detection signal DT ₁ pattern, since there is provided a control circuit 14 for performing time correction, without completely match holes each other, accurate zero-reset There is an advantage that there is no possibility that accurate position detection is not performed, and high-precision zero return can be realized.

The minute hand 134 and the hour hand 136
In addition, since the arc-shaped through hole, that is, the long hole is used as the through hole for transmitting the detection light, the range in which the light detection sensor 140 is turned on is widened, and the position detection time can be shortened. The time for performing time correction can be reduced. The hour hand wheel 136 has three types of light shielding portions C, D,
Since E is provided, the time can be adjusted 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. Thus, the time for correcting the time of the minute hand and the hour hand can be reduced.

[0085]

As described above, according to the self-correcting timepiece of the present invention, there is no possibility that the through-holes do not completely coincide with each other and accurate position detection of the zero-return is not performed. There is an advantage that zero can be realized. In addition, highly accurate time adjustment of the second hand, ie, the second hand, and time correction of the minute hand and the hour hand, ie, the minute hand and the hour hand can be performed.

Since the minute hand and the hour hand have arc-shaped through holes, the range in which the output of the detecting means is ON is widened, and as a result, the position detection time, that is, the time required for time correction. Can be shortened.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a signal processing circuit of a radio-controlled timepiece 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 for a radio-controlled timepiece 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 diagram for describing a criterion for determining a received radio wave state in a control circuit according to the present invention.

FIG. 5 is a diagram illustrating an example of a time code of a standard time radio signal.

FIG. 6 is a first diagram for driving a second hand which is a part of an automatic correction timepiece.
It is a top view which shows a drive system.

FIG. 7 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. 8 is a plan view showing a first fifth wheel that forms part of a first drive system that drives the second hand.

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

FIG. 10 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. 11 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. 12 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. 13 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. 14 is an end view showing the tips of the minute hand pipe and the hour hand pipe.

FIG. 15 is a flowchart for explaining time correction driving in the automatic correction timepiece according to the present invention.

FIG. 16 is a graph showing an output pattern of a minute hand wheel, an hour hand wheel, and a detecting means based on a combination of both in the correction drive shown in FIG. 15;

[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 as notification means 17 ... Buffer circuit 18 ... Drive circuit 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 concave part (first arrangement part) 112d ... circular through hole 113 ... medium Plate 120: first drive system 121: stepping motor for second hand (first drive source) 122: first fifth wheel (first transmission gear) 122c: through hole 123: second hand wheel (first pointer wheel) 123c: transparent Hole 123d: Positioning light shielding portion 123e: Urging spring 123f: Notch hole 123g: Notch hole 130: Second drive system 131: Minute hand system stay Ping motor (second drive source) 132: second fifth wheel 133: third wheel (second transmission gear) 133c: through hole 134: minute hand wheel (second hand 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 (third hand wheel) 136c ... arc-shaped through hole 136d ... arc-shaped through hole 136e ... Arc-shaped through hole 136g Groove (second index) 136p Hour hand pipe 140 Light detection sensor (detection means) 142 Light emitting element 144 Light receiving element 150 Manual correction system V _CC Power supply voltage C ₁ -C ₃ Capacitor R _{1 to} R ₅ ... resistance elements

Claims (4)

[Claims] 1. An automatic correction timepiece which receives a time signal, performs initial setting of a pointer position, and corrects a pointer position to a position corresponding to an input time signal, and operates in response to a first control signal. A first drive source, a first transmission gear that is rotationally driven by the first drive source, a first pointer wheel that meshes with the first transmission gear, and a second drive source that operates upon receiving a second control signal. A second transmission gear rotationally driven by the second drive source, a second pointer wheel meshing with the second transmission gear, and a third pointer wheel rotationally driven in conjunction with the second pointer wheel. The first transmission gear, the first pointer wheel, the second transmission gear, the second pointer wheel, and the third pointer wheel each have at least one through-hole formed therein, and among the formed through-holes, Any one of them is arranged so that they can overlap each other, and A light emitting element that emits detection light to a region where any one of the through holes can be respectively overlapped with the first transmission gear, the first pointer wheel, the second transmission wheel, the second pointer wheel, and the third pointer wheel. And a light-receiving element that is arranged at a position capable of receiving light that has passed through all the through-holes in the overlapping region of the through-holes out of the light emitted from the light-emitting element, and that outputs a detection signal according to a light-receiving level. A pattern light detection sensor, outputting the first and second control signals at the time of initial setting of the pointer position, and detecting the detection signal by the light detection sensor in a state where the first and second pointer wheels are rotated. Is switched to a level indicating that the detection light has been received, the output of the second control signal is stopped and the second control signal is output.
In a state where the pointer wheel is stopped, it is determined whether or not the level of the detection signal has reached a preset reference level. If the detection signal level has not reached the reference level, the second pointer wheel is rotated again. And a control means for comparing the detection signal with a reference level while the second hand wheel is stopped. 2. An automatic timepiece which, upon receipt of a time signal, initializes a hand position and corrects the hand position to a position corresponding to an input time signal, and operates automatically in response to a first control signal. A plurality of light-transmitting holes and a plurality of light-shielding portions which are rotatably driven by the first drive source and are alternately arranged in the circumferential direction; and wherein the plurality of light-shielding portions have the same width in the circumferential direction. A plurality of through-holes and a plurality of light-shielding portions, which are meshed with the first transmission gear and are alternately arranged in the circumferential direction. The light-shielding portion is formed so as to overlap with any of the plurality of through-holes formed in the first detection gear, and one of the plurality of light-shielding portions has a circumferential width that is equal to the width of the other light-shielding portion. With the first pointer wheel formed differently A second drive source that operates in response to a second control signal; and a plurality of through holes and a plurality of light blocking portions that are rotationally driven by the second drive source and that are alternately arranged in a circumferential direction. Is provided with a second transmission gear formed to have the same width in the circumferential direction, a plurality of arc-shaped through holes meshed with the second transmission gear and arranged alternately in the circumferential direction, and a plurality of light shielding portions. The plurality of arc-shaped through holes are formed so as to overlap with any of the plurality of through holes formed in the second transmission gear at the time of rotational driving, and one of the plurality of light shielding portions is shielded from light. The portion has a second pointer wheel formed so that the width in the circumferential direction is different from the widths of the other light shielding portions, and a plurality of rotary wheels driven in rotation in conjunction with the second pointer wheel and alternately arranged in the circumferential direction. With arc-shaped through holes and multiple light blocking parts The plurality of arc-shaped through-holes are formed so as to overlap with any of the plurality of through-holes formed in the second transmission gear at the time of rotational driving, and at least two of the plurality of light-shielding portions are shielded from light. The portion has a third hand wheel formed so that the width in the circumferential direction is different from each other light-shielding portion. The first transmission gear, the first hand wheel, the second transmission gear, and the second hand wheel The wheel and the third pointer wheel are arranged so that any one of the formed through holes can overlap each other, and the first transmission gear, the first pointer wheel, the second transmission gear, A light emitting element that emits detection light to a region where any one of the through holes can respectively overlap the second pointer wheel and the third pointer wheel, and an overlapping region of the through hole in the light emitted from the light emitting element Light passing through all through holes A transmission-type light detection sensor having a light-receiving element disposed at a position capable of receiving light and outputting a detection signal according to a light-receiving level; and outputting the first and second control signals when the pointer position is initially set. When the level of the detection signal from the light detection sensor is switched to a level indicating that the detection light is received while the first and second pointer wheels are being rotated, the second control signal Stop the output of the second
In a state where the pointer wheel is stopped, it is determined whether or not the level of the detection signal has reached a preset reference level. If the detection signal has not reached the reference level, the first pointer wheel and the second pointer wheel are again determined. 2. An automatic correction timepiece having control means for comparing a detection signal with a reference level in a state where the second pointer wheel is stopped after rotating the pointer wheel. 3. The control means rotates the first and second pointer wheels until the level of the detection signal reaches a reference level, and detects the second pointer wheel in a stopped state. 3. The automatic correction timepiece according to claim 1, wherein a process of comparing the signal with a reference level is repeated. 4. When the level of the detection signal reaches a reference level, the control means stops the first hand wheel, outputs the second control signal, and drives the second hand wheel to rotate. 4. The automatic timepiece according to claim 1, wherein the pattern of the detection signal is compared with a predetermined pattern, and the time is adjusted by stopping the second hand wheel according to the comparison result. .