JPH06222164A - Radio-corrected timepiece - Google Patents

Abstract

PURPOSE:To provide a radio-corrected timepiece which can be corrected not only with hourly signals but also with time-code signals without requiring troublesome operations and affecting its appearance and can be corrected at high accuracy. CONSTITUTION:A radio-corrected timepiece is provided with a through hole 50d formed in position in a hour hand wheel 50; a light-reflecting face 80a formed in position on a rotary detecting plate 80 mounted on a minute hand pipe; an optical sensor portion 90 which obtains an optical signal when the through hole 50d is opposite to the light reflecting face 80a; and a control circuit which, in an hourly signal mode, controls a driving system 40 according to the input timing of hourly signals and that of signals outputted from the optical sensor portion 90 so as to correct hand positions to match the hourly signals inputted, and which in a time-code signal mode controls the driving system 40 according to the input timing of signals outputted from the optical sensor portion so as to initialize the hand positions and to correct the hands from the initial positions to match the time-code signals inputted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio-controlled timepiece which receives a radio signal such as an hour signal and a time code signal to adjust the time.

[0002]

2. Description of the Related Art A radio-controlled timepiece receives an hourly signal or a time code signal of a predetermined frequency emitted from a radio station,
Although it has a function of performing so-called zero return based on the received signal, a hand position detecting device is provided in order to accurately adjust the position of the hand at the time of zero return.

As a conventional pointer position detecting device of this kind, for example, a light emitting element and a light receiving element of an optical sensor are arranged at a predetermined position of a dial for a timepiece, a pointer or glass, and light emitted from the light emitting element is directly emitted. Alternatively, a method in which light reflected by a reflector is indirectly received by a light receiving element to detect a pointer position, and a method in which a magnet and a magnetic sensitive element are used instead of the light emitting element and the light receiving element have been proposed ( See, for example, Japanese Utility Model Laid-Open No. 51-149672 and Japanese Patent Laid-Open No. 52-46850). Further, a timepiece equipped with these devices can also be manually corrected for the pointer position.

Further, as disclosed in Japanese Patent Laid-Open No. 61-118683, a through hole is formed in each gear of the train wheel in the drive system for the second hand and each gear of the train wheel in the drive system for the minute hand. Then, 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 with each through hole facing each other is received by the light receiving element, for example, the pointer position detection is detected as the hour. Devices have also been proposed.

[0005]

However, in the above-mentioned former pointer position detecting device, it is necessary to provide a hole for a sensor or a reflecting plate in a decorative dial plate or exterior, so that the external appearance is not good. . Further, since the number of exteriors of the timepiece is large, it is necessary to perform the positioning of the sensor for each product, which is disadvantageous in that it is troublesome.

On the other hand, the latter pointer position detecting device does not require complicated adjustment and does not spoil the appearance, but for example, if only the minute hand gear is provided with a through hole, the hour indicator can be adjusted. There is a problem that it is only possible to detect the position of the time code signal and it becomes difficult to respond to the time code signal.Because the minute hand wheel is equipped with a minute hand slip mechanism when performing manual correction, there is a difference between the through hole position and the initial setting position. There is a problem in that a so-called phase shift occurs because of a shift, which makes it impossible to perform highly accurate position detection.

The present invention has been made in view of such circumstances, and an object thereof is not to cause troublesome work, to have no influence on the appearance, and to not only the hour signal but also the time code signal. An object of the present invention is to provide a radio-controlled timepiece that can be adjusted and can perform highly accurate time adjustment.

[0008]

In order to achieve the above object, according to the present invention, a drive system for rotating a minute hand wheel at a predetermined speed and a rotation of the hour hand wheel by reducing the rotation speed of the minute hand wheel to a predetermined speed. The intermediate wheel, the first light transmitting portion provided at a predetermined position of the hour hand wheel, and the first light transmitting portion provided at a predetermined position of the minute hand wheel so as to face the arrangement region of the first light transmitting portion. A second light transmitting portion, the first light transmitting portion, and the second light transmitting portion.
The optical sensor section that obtains an output signal when the optical transmission section of the unit directly faces, and the drive system is controlled according to the input timing of the hour signal and the output signal of the optical sensor section, and the pointer position is input. And a control circuit for correcting the position according to the signal.

In the present invention, a drive system for rotating the minute hand wheel at a predetermined speed, an intermediate wheel for decelerating the rotation speed of the minute hand wheel to a predetermined speed and rotating the hour hand wheel, and a predetermined position of the hour hand wheel. The first light transmitting portion provided, the second light transmitting portion provided at a predetermined position of the minute hand wheel so as to face the arrangement area of the first light transmitting portion, and the first light transmitting portion. An optical sensor unit that obtains an output signal when the optical transmission unit and the second optical transmission unit face each other, and the drive system is controlled according to the input timing of the output signal of the optical sensor unit to control the pointer position. A control circuit is provided which performs initial setting and corrects the pointer position from the initial position to a position according to the input time code signal.

In the present invention, a drive system for rotating the minute hand wheel at a predetermined speed, an intermediate wheel for decelerating the rotation speed of the minute hand wheel to a predetermined speed and rotating the hour hand wheel, and a predetermined position for the hour hand wheel. The first light transmitting portion provided, the second light transmitting portion provided at a predetermined position of the minute hand wheel so as to face the arrangement area of the first light transmitting portion, and the first light transmitting portion. An optical sensor section that obtains an output signal when the light transmission section and the second light transmission section face each other, a means for switching between the hour signal mode and the time code signal mode, and a positive signal during the hour signal mode. The drive system is controlled according to the input timing of the time signal and the output signal of the optical sensor unit to correct the pointer position to the position corresponding to the input hour signal, and the output signal of the optical sensor unit in the time code signal mode. The drive system is controlled according to the input timing of Initialize the pointer position, and to a control circuit for modifying the position corresponding to the input time code signal pointer position from the initial position.

[0011]

According to the present invention, the minute hand wheel is rotated at a predetermined speed by the drive system, and accordingly, the hour hand wheel is also rotated at a speed decelerated from the rotation speed of the minute hand wheel via the intermediate wheel. With the rotation of the minute hand wheel and the hour hand wheel, the first light transmitting section and the second light transmitting section face each other in due course, and the optical sensor section outputs a signal to the control circuit. In the control circuit, the drive system is controlled according to the output signal of the optical sensor unit and the input timing of the hour signal from the radio station, for example, and the pointer position is corrected to the time position according to the input hour signal. .

According to the present invention, the drive wheel rotates the minute hand wheel at a predetermined speed, and accordingly, the hour hand wheel also rotates at a speed decelerated from the rotational speed of the minute hand wheel via the intermediate wheel.
With the rotation of the minute hand wheel and the hour hand wheel, the first light transmitting section and the second light transmitting section face each other in due course, and the optical sensor section outputs a signal to the control circuit. In the control circuit, the drive system is controlled according to the input timing of the output signal of the optical sensor unit to initialize the pointer position. Then, the pointer position is corrected to the time position corresponding to the input time code signal from the radio station, for example.

Further, according to the present invention, the above-described pointer position correction control is performed according to the switching mode by the mode switching means, that is, the hour signal mode and the time code signal mode.

[0014]

1 is a sectional view showing the overall construction of an embodiment of a pointer position detecting device for a radio-controlled timepiece according to the present invention, and FIG. 2 is a plan view of the essential parts of the pointer position detecting device according to the present invention. 3 is a block diagram showing an embodiment of a pointer position correcting device which is a signal processing system of the radio-controlled timepiece according to the invention.

In the figure, 10 is a watch body, 20 is a second hand drive system, 30 is a first reflection type optical sensor, 40 is a minute hand drive system, 50 is an hour hand wheel, 60 is a back wheel of the day as an intermediate wheel, 7
0 is a manual correction axis, 80 is a rotation detection plate, 90 is a second reflection type optical sensor, 100 is an hour signal receiving system, 110 is a time code signal receiving system, 120 is a reset switch, 130 is a start switch, and 140 is Hourly / code signal changeover switch, 150 oscillator circuit, 160 control circuit, 170 buffer circuit, 180 drive circuit, V _CC power supply voltage, C _{1 to} C ₃ capacitors, R _{1 to} R ₆ resistor elements Are shown respectively.

In the timepiece body 10, an intermediate plate 12 is arranged in a space formed by a lower plate 11 and an upper plate 13 in a substantially central portion in a state of being connected to the lower plate 11. Middle plate 1
2, with respect to a predetermined position of the upper plate 13, the second hand drive system 20,
A first reflection type optical sensor 30, a second drive system 40, an hour hand wheel 50, a date indicator wheel 60, a manual correction shaft 70 and a second reflection type optical sensor 90 are fixed or pivotally supported.

The second hand drive system 20 comprises a first stepping motor 21, a first fifth wheel & pinion 22 and a second hand wheel 23. In the first stepping motor 21, the stator 21 a is mounted on the lower plate 11, the rotor 21 b is pivotally supported by the lower plate 11 and the upper plate 13, and the buffer circuit 17 is provided.
Output control signal C of the control circuit 160 inputted via 0
The rotation direction, rotation angle, and rotation speed are controlled based on TL ₁ .

The first fifth wheel & pinion 22 is rotatably supported by the lower plate 11 and the upper plate 13 and its toothed portion is meshed with the rotor 21b of the first stepping motor 21 so that the rotational speed of the rotor 21b is kept at a predetermined speed. Slow down. This first 5th wheel 22
Is configured to rotate once every 15 seconds, for example, and a slit-shaped through hole 22a is formed in a part of a region where the second hand wheel 23 overlaps.

In the second hand wheel 23, one end of its shaft portion is the upper plate 13.
Is pivotally supported on the other side, and the other end side penetrates the middle plate 12 to the lower plate 11 side,
The second hand shaft 23a is press-fitted on the other end side. The second hand shaft 23a is inserted into a through hole 44b of a minute hand pipe 44a which penetrates a lower plate 11 to be described later and protrudes to the surface side where a dial of a timepiece is formed. To be The second hand wheel 23 has a second hand pinion meshed with a pinion of the first fifth wheel & pinion 22 so as to rotate once every 60 seconds. Further, a light reflecting surface 23b is formed in a part of the overlapping region of the second hand wheel 23 with the first fifth wheel 22 so as to face the through hole 22a formed in the first fifth wheel 22. There is. The second hand drive system 20 as described above is configured such that the second hand indicates the hour when the light reflecting surface 23b and the through hole 22a are superposed on each other, that is, in a state where they are directly opposed to each other.

In the first reflection type photosensor 30, a light emitting element 31 formed of a light emitting diode and a light receiving element 32 formed of an npn transistor are arranged in parallel, and the light emitting portion of the light emitting element 31 and the light receiving surface of the light receiving element 32 are arranged. , Through the through hole 13a formed in the upper plate 13 and through the through hole 22a of the first fifth wheel & pinion 22 so as to face the surface on which the light reflecting surface 23b of the second hand wheel 23 is formed. It is installed in.

The light emitting element 31 of the first reflective photosensor 30.
One end of the anode has a power supply voltage V_CCDrive connected to
Resistance element R in circuit 180₃Connected to the other end of
The sword is also a dry placed in the drive circuit 180.
It is connected to the collector of the transistor 181. This
The emitter of the driver transistor 181 of is grounded,
The base is a resistance element R _FourOf the control circuit 160 via
Signal DR₁Is connected to the output line of. Sanawa
Then, the light emitting element 31 is set to the high level from the control circuit 160.
Drive signal DR₁To emit light when is output
It is connected to the drive circuit 180.

The light receiving element 32 of the first reflective photosensor 30.
The collector of is connected to the power supply voltage V _CC via the resistance element R ₁ , is connected to the control circuit 160, and the emitter is grounded. That is, in the light receiving element 32, the light emitted from the light emitting element 31 reaches the second hand wheel 23 through the through holes 13a and 22a, and the light reflected by the light reflecting surface 23b passes through the through holes 13a and 22a. Through the light receiving element 32
Only when the light is received at, the detection signal DT ₁ is input to the control circuit 160 at a low level.

The minute hand drive system 40 is composed of a second stepping motor 41, a second fifth wheel 42, a third wheel 43 and a minute hand wheel 44. In the second stepping motor 41, the stator 41 a is placed on the lower plate 11, the rotor 41 b is pivotally supported by the lower plate 11 and the upper plate 13, and the control circuit 160 of the control circuit 160 input via the buffer circuit 170 is input. The rotation direction, rotation angle, and rotation speed are controlled based on the output control signal CTL ₂ .

The second fifth wheel & pinion 42 is rotatably supported by the lower plate 11 and the upper plate 13, and its wheel teeth are meshed with the rotor 41b of the second stepping motor 41 to keep the rotational speed of the rotor 41b at a predetermined speed. Slow down.

The third wheel & pinion 43 is arranged such that one end of its shaft portion is pivotally supported by the upper plate 13 and the other end side penetrates the middle plate 12, and the wheel tooth portion is the second fifth wheel & pinion 42. It is meshed with the kana part of.

The minute hand wheel 44 has a substantially T-shape with a through hole 44b formed in the center, one end of the minute hand pipe 44a is pivotally supported by the middle plate 12, and the other end side shaft part is the lower plate 11. A hour hand pipe 50a of the hour hand wheel 50 is inserted through a through hole 50b of the hour hand wheel 50 that penetrates through and protrudes to the surface side where the dial of the timepiece and the like are formed. The minute hand wheel 44 is configured to rotate once every 60 minutes, and as described above, the second hand shaft 23 is attached to the through hole 44b.
a is inserted, and its ring tooth portion is meshed with the pinion portion of the third wheel & pinion 43. The minute hand wheel 44 as described above is provided with a so-called slip mechanism.

The hour hand wheel 50 has a substantially T-shape with a through hole 50b formed in the central portion thereof, the ring teeth are arranged inside the timepiece main body 10, and the hour hand pipe 50a penetrates the lower plate 11 to make a timepiece. The hour hand (not shown) is attached to the tip of the dial. The hour hand wheel 50 is 30 ° in 1 hour.
It is configured to rotate and rotate once in 12 hours.
Further, as described above, the minute hand pipe 44 is attached to the through hole 50b.
a is inserted. A through hole 50d as a first light transmitting portion is formed in a surface 50c of the hour hand wheel 50 facing the minute hand wheel 44. As shown in FIG. 4, the through-holes 50d of the hour hand wheel 50 are formed at 11 positions except one of the positions divided into 12 equal parts by 30 ° in the circumferential direction of the hour hand wheel 50. That is, the position detection is performed only for one hour out of twelve hours.

The date driving wheel 60 is pivotally supported on the projection 11a formed on the lower plate 11, and the ring tooth portion is provided with the minute hand wheel 4.
4 is meshed with the minute hand pipe 44a, and the pinion portion is the hour hand wheel 50.
The rotation speed of the minute hand wheel 44 is reduced to a predetermined speed and transmitted to the hour wheel 50. The day wheel 60 is configured to rotate once in N (N is a positive integer) time, and its ring tooth portion meshes with the correction pinion 70a of the manual correction shaft 70 and partially Are arranged so as to face a part of the rotation detection plate 80.

The manual correction shaft 70 has a substantially T shape, and the correction pin 70a at the tip thereof is the opening 1 formed in the upper plate 13.
Projection 11b formed on the lower plate 11 with the 3b inserted therethrough
The head 70b is arranged so as to project from the upper plate 13 to the outside of the timepiece body 10. The manual correction shaft 70 has the same phase as the minute hand wheel 44 and is configured to rotate once every 60 minutes.
The wheel teeth of the back wheel 60 of the day are meshed with a, and the minute hand drive system 4
When the minute hand wheel 44 is driven by 0, the minute hand wheel 44 rotates in the same phase as the minute hand wheel 44 via the back wheel 60 of the day, and when the minute hand drive system 40 is not operated, the head 70b is rotated to manually set the pointer position. It is configured to be modifiable.

The rotation detecting plate 80 is in the shape of a disk, and the central portion of the rotation detecting plate 80 is provided on the shaft portion of the minute hand wheel 44 between the minute hand wheel 44 and the hour hand wheel 50 so as to rotate in response to the rotation of the minute hand wheel 44. The axes are fixed so that their axes are substantially aligned with each other. Also, the rotation detection plate 80
In a part of the area facing the surface 50c of the hour hand wheel 50 of FIG.
As shown in FIG. 7, a light reflecting surface 80a as a second light transmitting portion is formed so as to face the through hole 50d.

In the second reflection type photosensor 90, a light emitting element 91 formed of a light emitting diode and a light receiving element 92 formed of an npn transistor are arranged in parallel, and the light emitting portion of these light emitting element 91 and the light receiving surface of the light receiving element 92 are arranged. , Through the through hole 11c formed in the lower plate 11 and further through the through hole 50d formed in the hour wheel 50, through the light reflecting surface 80a of the rotation detecting plate 80.
It is arranged on the lower plate 11 so as to face the surface 80b on which is formed.

Light emitting element 91 of the second reflective photosensor 90
One end of the anode has a power supply voltage V_CCDrive connected to
Resistance element R in circuit 180_FiveConnected to the other end of
The sword is also a dry placed in the drive circuit 180.
It is connected to the collector of the transistor 182. This
The emitter of the driver transistor 182 of is grounded,
The base is a resistance element R ₆Of the control circuit 160 via
Signal DR₆Is connected to the output line of. Sanawa
Then, the light emitting element 91 is turned to the high level from the control circuit 160.
Drive signal DR₂To emit light when is output
It is connected to the drive circuit 180.

The light receiving element 92 of the second reflective photosensor 90.
The collector of is connected to the power supply voltage V _CC via the resistance element R ₂ , is connected to the control circuit 160, and the emitter is grounded. That is, in the light receiving element 92, the light emitted from the light emitting element 91 reaches the surface 80b of the rotation detecting plate 80 via the through hole 50d, and the light reflecting surface 80
Only when the light reflected by a is received by the light receiving element 92 through the through hole 50d, the detection signal DT ₂ is input to the control circuit 160 at a low level.

The relationship between the light reflecting surface 80a of the rotation detecting plate 80 and the through hole 50d of the hour hand wheel 50 is such that when the light reflecting surface 80a faces the through hole 50d, a minute hand and an hour hand (not shown) are present. It is set to indicate the hour.

The hour signal receiving system 100 includes a receiving antenna 1
01, a medium wave receiving circuit 102 that receives a medium wave (for example, 300 Hz to several thousand kHz) in the frequency band of AM radio broadcasting transmitted from a radio station, and performs predetermined signal processing, and a signal by the medium wave receiving circuit 102. And the hour signal detection circuit 103 that detects the hour signal ES from the output and outputs it to the control circuit 160.

The time code receiving system 110 receives a long wave (for example, 30 Hz to several hundred kHz) including a time code signal transmitted from a radio station, for example, and a medium wave receiving circuit 112 for performing a predetermined signal processing. And a code signal detection circuit 113 that detects the time code signal CS by performing waveform shaping on the signal from the medium wave reception circuit 112 and outputs it to the control circuit 160.

The reset switch 120 includes the control circuit 16
It is turned on when returning various states of 0 to the initial state. The start switch 130 is turned on when starting the time adjustment in the hour signal mode. The hour / code signal changeover switch 140 is turned on when the time is adjusted in the hour signal mode.

The oscillator circuit 150 is composed of a crystal oscillator 151 and capacitors C ₂ and C ₃ , and supplies a basic clock having a predetermined frequency to the control circuit 160.

The control circuit 160 has a minute hand counter, a second hand counter, and a standard minute / second counter, which are not shown, and interprets the hour signal ES or the code signal CS input according to the hour signal mode and the time code signal mode. Then, the stepping motor 21 for the second hand is controlled according to the count control of various counters based on the basic clock by the oscillation circuit 150 and the input levels of the detection signals DT ₁ and DT ₂ by the first and second reflection type optical sensors 30 and 90. And the time adjustment control is performed by controlling the rotation of the stepping motor 41 for the hour and minute hands.

Next, the time correction control operation by the control circuit 160 will be described with reference to FIGS. 6 to 10 separately for the hour signal mode and the code signal mode. Here, the operation of the minute hand system will be described as an example.

First, the time correction control operation in the hour signal mode will be described with reference to FIGS. In this case, the hour / code signal changeover switch 140 is turned on. The initial needle alignment under the hour signal mode is shown in FIG.
It is performed as shown in. That is, a battery (not shown) is inserted and set in a predetermined position of the timepiece (S1). At this time, the control circuit 160 outputs the drive signals DR ₁ and DR ₂ at a high level to the drive circuit 180, and the light emitting elements 31 and 9 of the first and second reflection type photosensors 30 and 90 are output.
1 is in a light emitting state.

Next, the time is adjusted within ± 30 minutes by manual correction (S2). Specifically, the head portion 70b of the manual correction shaft 70 is manually rotated in the clockwise direction or the counterclockwise direction. The rotation of the manual correction shaft 70 is transmitted to the minute hand pipe 44a of the minute hand wheel 44 via the date wheel 60 and to the hour hand wheel 50 via the shaft portion of the date wheel 60. At this time, since the minute hand pipe 44a of the minute hand wheel 44 is in phase with the manual correction shaft 70, it rotates at the same speed as the manual correction shaft 70, and the hour hand wheel 50 rotates at a decelerated predetermined speed.

With the manual rotation of the manual correction shaft 70,
The rotation detection plate 80 also rotates at the same speed as the minute hand pipe 44a. With the rotation of the rotation detection plate 80 and the hour hand wheel 50, the through hole 50d of the hour hand wheel 50 and the light reflection surface 80a of the rotation detection plate 80 eventually face each other and face each other. At this time, the light emitted from the light emitting element 91 of the second reflective photosensor 90 reaches the light reflecting surface 80a of the rotation detecting plate 80 via the through hole 50d and is reflected there. This reflected light is received by the light receiving element 92 via the through hole 50d. As a result, the low-level detection signal DT ₂ is input to the control circuit 160.

Next, the start switch 130 is turned on to start the time adjustment in the hour signal mode (S3). At this time, the position detection information for the manual correction input to the control circuit 160 is reset. As a result, normal hand movement control is entered (S4). At this time, the control circuit 160 outputs control signals CTL ₁ and CTL ₂
Is output to the first and second stepping motors 21 and 41 via the buffer circuit 170 to control the rotation. After the shift to the normal hand movement, the first time adjustment as shown in FIG. 7 is performed based on the presence or absence of the reception of the hour signal.

After the shift to the normal hand movement (S4), it is determined whether or not the position detection of the minute is performed, that is, whether or not the detection signal DT ₂ by the second optical sensor 90 is switched from the high level to the low level. (S5). Step S5
When it is determined that the minute position detection has been performed, it is determined whether the hour signal is received from the input state of the output ES of the hour signal detection circuit 103 of the hour signal reception system 100. (S6).

If it is determined in step S6 that the hour signal has been received, the time difference from the position detection of the minute to the input of the hour signal is calculated, and it is determined whether the error is within 30 minutes. (S7). If the error is other than 30 minutes, the operation returns to step S5, and if it is within 30 minutes, the radio-corrected timepiece has detected the hour before (the timepiece is in the advanced state), which corresponds to the error. The control signal CTL ₂ is output to the second stepping motor 41 via the buffer circuit 170 so as to stop the rotation of the second stepping motor 41 for a predetermined time (S8). After a lapse of a predetermined time for stopping the rotation of the second stepping motor 41, the control signal CTL ₂ controlled to perform the normal hand movement is output to the second stepping motor 41 via the buffer circuit 170. As a result, normal hand movement is performed (S9).

On the other hand, if it is determined in step S5 that the minute position has not been detected, the hour signal is received from the input state of the output ES of the hour signal detection circuit 103 of the hour signal receiving system 100. It is determined whether or not it has been performed (S10). If it is determined in step S10 that the hour signal has been received, it is determined whether or not the minute position has been detected, that is, the detection signal DT by the second optical sensor 90.
_It is determined whether or not ₂ has switched from the high level to the low level (S11).

If it is determined in step S11 that the position of the minute has been detected, the difference from the time when the position of the minute is detected after the hour signal is received is obtained, and the error is 3
It is determined whether it is within 0 minutes (S12). If the error is other than 30 minutes, the operation returns to step S5,
If it is within 30 minutes, the radio wave correction timepiece side later detects the hour (the timepiece is in a delayed state). Therefore, the rotation of the second stepping motor 41 is sped up, and the position of the minute is detected. Up to, that is, the control signal CTL ₂ is output to the second stepping motor 41 via the buffer circuit 170 so as to fast-forward until the detection signal DT ₂ from the second optical sensor 90 switches from the high level to the low level. (S13). Next, the delay caused by this fast-forwarding is corrected by the amount, and the process proceeds to normal hand movement (S9).

After the above-mentioned first correction, the second and subsequent corrections are performed by the procedure shown in FIG. That is, when the hour signal is received during normal hand movement (S9) (S1
5) In the control circuit 160, it is determined whether or not there is a difference between the input hour signal and the minute hand counter (S16). If it is determined in step S16 that there is a difference,
Since the error per day is 1 second or less in the quartz clock, the counter is corrected according to the difference (S17). In addition,
When the difference is large, the control signal CTL ₂ causes the second
The rotation control of the stepping motor 41 is performed to correct the pointer position. After the correction of the counter and the like, the normal hand movement is performed (S18).

Next, the time correction control operation in the time code signal mode will be described with reference to FIGS. 9 and 10. In this case, the hour / code signal changeover switch 140
Is turned off. In this state, a battery (not shown) is inserted and set in a predetermined position of the timepiece (ST1). As a result, the drive signals DR ₁ and DR ₂ are output from the control circuit 160 to the drive circuit 180 at a high level, and the light emitting elements 31 and 9 of the first and second reflective photosensors 30 and 90 are output.
1 becomes the light emitting state, and the control signals CTL ₁ and CT
L ₂ is output to the first and second stepping motors 21 and 41 via the buffer circuit 170.

As the initial hand adjustment in the time code signal mode, the zeroing operation shown in steps ST2 to ST8 is performed within a predetermined time. That is, first, the fast-forward control of the second stepping motor 41 is performed by the control signal CTL ₂ , and the minute hand (not shown) is fast-forwarded in a predetermined direction, for example, clockwise (ST2). Next, it is determined whether or not the position of the minute has been detected, that is, the second optical sensor 9
It is determined whether or not the detection signal DT ₂ based on 0 is switched from the high level to the low level (ST3).

If it is determined in step ST3 that the position of the minute has been detected, the minute hand is further fast forwarded (ST4), and then the position of the minute is not detected after 60 minutes ± 10 seconds. Whether or not it is determined (ST
5). If it is determined in step ST5 that the minute position has not been detected after 60 minutes ± 10 seconds, the minute hand is further fast forwarded (ST6), and then it is determined whether the minute position has been detected again. That is, it is determined whether or not the detection signal DT ₂ from the second optical sensor 90 has switched from the high level to the low level (ST7). When it is determined in step ST7 that the minute position has been detected, it is determined that the pointer is positioned at the 0 o'clock position,
The control signal CTL ₂ is output so as to stop the rotation of the second stepping motor 41 (ST8). With the above, the zero-return operation is completed.

When the zero-reset operation is completed, the output signal CS of the code signal detection circuit 113 of the time code signal receiving system 110 is output.
From the input state of, it is determined whether the time code signal is received (ST9). In step ST9,
When it is determined that the time code signal is received, the control signal CT is set to fast-forward the second stepping motor 41 for a predetermined time corresponding to the time indicated by the time code signal.
L ₂ is output (ST10). As a result, the time adjustment is completed and the operation moves to normal hand movement (ST11).

After the above-mentioned first correction, the second and subsequent corrections are performed by the procedure shown in FIG. That is,
When the time code signal is received during the normal hand movement (ST12) (ST13), the control circuit 160 determines whether or not there is a difference between the input time code signal and the minute hand counter (ST14). If it is determined in step ST14 that there is a difference, the error in units of days is 1 second or less in the quartz timepiece, so the counter is corrected according to the difference (ST15). When the difference is large, the rotation of the second stepping motor 41 is controlled by the control signal CTL ₂ , and the pointer position is corrected. After the correction of the counter and the like, the normal hand movement is performed (ST16).

As described above, according to this embodiment,
The rotation detecting plate 80 having the light reflecting surface 80a formed thereon is attached to the minute hand pipe 44a, and the time when the through hole 50d and the light reflecting surface 80a face each other is set as the hour, and the second reflection type optical sensor 90 transmits the light. The detection signal DT of the second reflection type optical sensor 90 is set to the hour position when the reflected light of the light reflecting surface 80a is received through the hole 50d, and corresponding to the hour signal mode and the time code signal mode. ₂ and the control circuit 160 for performing initial setting and position correction of the pointer position according to the input timing of the hour signal or the time code signal, it is not necessary to form a hole for the sensor on the dial or exterior, It does not spoil the appearance, does not require complicated work such as adjusting the position of each exterior, and has high accuracy in both hour signal mode and time code signal mode. It can realize the time correction by radio waves. Also, the through hole 50d of the hour hand wheel 50 is
Since it was formed at 11 places except one of the positions divided by 12 in the circumferential direction of 30 ° so that the position detection for 1 hour out of 12 hours would not be performed, It is possible to accurately detect the predetermined position during operation. Further, the minute hand pipe 44a of the minute hand wheel 44 and the manual correction shaft 70
Since the phase is the same as that of the hour hand wheel 50, even if there is a minute hand slip mechanism, the light reflecting surface 80a of the rotation detection plate 80 and the through hole 50d of the hour hand wheel 50 do not deviate from each other. Therefore, even if the pointer position is manually corrected, a phase shift does not occur and highly accurate position detection can be realized.

In this embodiment, the hour wheel 50 is formed with the through hole and the rotation detecting plate 80 is formed with the light reflecting surface. However, the present invention is not limited to this.
The same effect as described above can be obtained even if the light reflecting surface is formed on 0, the through hole is formed on the rotation detecting plate 80, and the second reflection type optical sensor 90 is arranged on the minute hand wheel 44 side. . Further, in the present embodiment, an example using the reflection type optical sensor 90 has been described, but the hour hand wheel 50 and the rotation detection plate 8 are provided.
It is also possible to use a transmissive optical sensor by forming through holes in both of them, and also in this case, the same effect as described above can be obtained.

[0057]

As described above, according to the present invention,
It is not necessary to form holes for sensors on the dial or exterior, does not require troublesome work, does not impair the appearance of the appearance, and is not only for time correction by not only hour signals but also time code signals. It is also possible to realize high precision time correction.

[Brief description of drawings]

FIG. 1 is a sectional view showing an overall configuration of an embodiment of a pointer position detecting device for a radio-controlled timepiece according to the invention.

FIG. 2 is a plan view of a main part of a pointer position detecting device according to the present invention.

FIG. 3 is a block diagram showing an embodiment of a pointer position correction device for a radio-controlled timepiece according to the invention.

FIG. 4 is a diagram showing an example of a formation pattern of through holes of the hour hand wheel according to the present invention.

FIG. 5 is a diagram showing an example of a formation pattern of a light reflecting surface of the rotation detecting plate according to the present invention.

FIG. 6 is a flow chart for explaining an initial needle matching operation in the hour signal mode.

FIG. 7 is a flowchart for explaining an initial correction operation in the hour signal mode.

FIG. 8 is a flowchart for explaining the second and subsequent correction operations in the hour signal mode.

FIG. 9 is a flowchart for explaining an initial correction operation in the time code signal mode.

FIG. 10 is a flowchart for explaining the second and subsequent correction operations in the time code signal mode.

[Explanation of symbols]

10 ... Clock body 11 ... Lower plate 12 ... Middle plate 13 ... Upper plate 20 ... Second hand drive system 21 ... First stepping motor 22 ... Second fifth wheel 22a ... Through hole 23 ... Second hand wheel 23b ... Light reflecting surface 30 ... 1st reflection type optical sensor 40 ... minute hand drive system 41 ... 2nd stepping motor 42 ... 2nd 5th wheel 43 ... 3rd wheel 44 ... minute hand wheel 44a ... minute hand pipe 50 ... hour hand wheel 50d ... through hole 60 Back wheel (intermediate wheel) 70 ... Manual correction shaft 80 ... Rotation detection plate 80a ... Light reflecting surface 90 ... Second reflection type photosensor 100 ... Hourly signal receiving system 101 ... Receiving antenna 102 ... Medium wave receiving circuit 103 ... Hourly signal detecting circuit 110 ... Time code signal receiving system 111 ... Receiving antenna 122 ... Long wave receiving circuit 103 ... Code signal detecting circuit 120 ... Reset switch 130 ... Start switch 140 ... Hourly / Code signal changeover switch 150 ... Oscillation circuit 151 ... Crystal oscillator 160 ... Control circuit 170 ... Buffer circuit 180 ... Drive circuit V _CC ... Power supply voltage C _{1 to} C ₃ ... Capacitor R _{1 to} R ₆ ... Resistor element

Claims (3)

[Claims] 1. A drive system for rotating a minute hand wheel at a predetermined speed, an intermediate wheel for decelerating the rotation speed of the minute hand wheel to a predetermined speed and rotating the hour hand wheel, and a drive wheel provided at a predetermined position of the hour hand wheel. A first light transmitting portion, a second light transmitting portion provided at a predetermined position of the minute hand wheel so as to face the area where the first light transmitting portion is provided, and the first light transmitting portion. Sensor section for obtaining an output signal when the optical section and the second optical transmission section face each other, and the drive system is controlled according to the input timing of the hour signal and the output signal of the optical sensor section, and a pointer is provided. A radio-controlled timepiece having a control circuit for correcting the position to a position according to an input hourly signal. 2. A drive system for rotating the minute hand wheel at a predetermined speed, an intermediate wheel for decelerating the rotation speed of the minute hand wheel to a predetermined speed and rotating the hour hand wheel, and a drive wheel provided at a predetermined position of the hour hand wheel. A first light transmitting portion, a second light transmitting portion provided at a predetermined position of the minute hand wheel so as to face the area where the first light transmitting portion is provided, and the first light transmitting portion. Section and the second light transmitting section face each other to obtain an output signal, and the drive system is controlled according to the input timing of the output signal of the optical sensor section to initialize the pointer position. And a control circuit for correcting the pointer position from the initial position to a position according to the input time code signal. 3. A drive system for rotating the minute hand wheel at a predetermined speed, an intermediate wheel for decelerating the rotation speed of the minute hand wheel to a predetermined speed and rotating the hour hand wheel, and a drive wheel provided at a predetermined position of the hour hand wheel. A first light transmitting portion, a second light transmitting portion provided at a predetermined position of the minute hand wheel so as to face the area where the first light transmitting portion is provided, and the first light transmitting portion. Section and an optical sensor section for obtaining an output signal when the second optical transmission section directly faces each other, means for switching between the hour signal mode and the time code signal mode, and the hour signal in the hour signal mode And the drive system is controlled according to the input timing of the output signal of the optical sensor unit, and the pointer position is corrected to the position according to the input hour signal,
In the time code signal mode, the drive system is controlled according to the input timing of the output signal of the optical sensor unit to initialize the pointer position, and the pointer position is corrected from the initial position to the position corresponding to the input time code signal. A radio-controlled timepiece having a control circuit.