JPH06109867A - Hand-position detector for timepiece - Google Patents

Abstract

PURPOSE:To prevent phase deviation even if a hand position is manually corrected and to make it possible to detect the position highly accurately by receiving the reflected light from a light reflecting surface by way of a through hole when the through hole of a timepiece wheel and the light reflecting surface of a rotation detecting plate face to each other squarely. CONSTITUTION:When the on-the-hour signal is received and a zero-return instruction is imparted to a second-hand driving system 20 and a minute-hand driving system 40 from a control system, or a manual correcting shaft 70 is rotated, a rotation detecting plate 80 is also rotated at the same speed by the rotation of a minute-hand pipe 44a. When a through hole 50d of an hour-hand wheel 50 agrees with a light detecting plate 80a of the detecting plate 80, the light emitted from the light emitting element of a reflection type optical sensor 90 is reflected from the reflecting surface 80a and received by way of the through hole 50d. As a result, the high-level detected signal is outputted to the control system and the fact that the minute hand and the hour hand have pointed the on-the-hour time is recognized. At this time, a slit mechanism exists in an minute-hand wheel 44. The pipe 44a and the hour-hand wheel 50 are in the same phase. Therefore, the facing positions of the through hole 50d and the reflecting surface 80a agree with the initial setting time without an error, and the on-the-hour time potions of the minute hand and the hour hand can be accurately detected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pointer position detecting device applied to a radio-controlled timepiece or the like, and more particularly to a pointer position detecting device for a timepiece capable of manually correcting the pointer position.

[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 in the case of manual correction, the minute hand wheel is provided with a minute hand slip mechanism. Therefore, there is a problem that a deviation between the through hole position and the initial setting position occurs, that is, a so-called phase deviation occurs, and it is not possible to perform highly accurate position detection.

The present invention has been made in view of such circumstances, and an object thereof is not to require complicated labor, to affect the appearance, and even if the pointer position is manually corrected. An object of the present invention is to provide a pointer position detecting device for a timepiece in which no phase shift occurs.

[0008]

In order to achieve the above object, in the present invention, a first drive system for rotating the second hand wheel by decelerating the rotation speed of the first motor to a predetermined speed by at least one gear. A second drive system for rotating the minute hand wheel by decelerating the rotation speed of the second motor to a predetermined speed by at least one gear, and an hour hand wheel having a first light transmitting portion formed at a predetermined position. An intermediate wheel that rotates the hour hand wheel by decelerating the rotation speed of the minute hand pipe to a predetermined speed, a correction shaft that is meshed with the intermediate wheel and is manually rotatable in the same phase as the minute hand wheel shaft part, and the hour hand. A rotation detecting plate, which is provided on the minute hand pipe so as to face the formation region of the first light transmitting portion of the vehicle and has a second light transmitting portion formed at a predetermined position, and the first light transmitting portion. An optical sensor that obtains an output signal when directly facing the second optical transmission section. It was to have the support section.

In the present invention, the first light transmitting portion of the hour hand wheel is 11 of the 12 positions divided in the circumferential direction of the middle hour hand wheel.
It was formed in at least one of the locations.

In the present invention, the first light transmitting portion is formed as a through hole, the second light transmitting portion is formed as a light reflecting surface, and the light sensor portion is constituted by a reflection type optical sensor, and the through hole is formed. It is arranged so as to exchange light with the rotation detection plate.

In the present invention, the first light transmitting portion is formed as a light reflecting surface, the second light transmitting portion is formed as a through hole, and the optical sensor portion is constituted by a reflection type optical sensor, and the through hole is formed. It is arranged so as to exchange light with the rotation detection plate.

In the present invention, the first light transmitting portion and the second light transmitting portion are formed as through holes, the light sensor portion is constituted by a transmissive optical sensor, and light is transmitted through the through holes. Arranged to give and receive.

According to the present invention, the light transmitting portion is provided at a predetermined position of the second hand wheel and a gear having a surface facing the second hand wheel and transmitting the rotation of the first motor to the second hand wheel, and each light transmitting portion is directly opposed. An optical sensor unit is provided to obtain an output signal when

[0014]

According to the present invention, for example, when the hour signal is received from a radio station, a zero return operation instruction is sent from the control system to the first drive system and the second drive system. The first motor of the first drive system that has received the zero-return operation instruction is rotated in the clockwise direction or the counterclockwise direction, for example, at a high speed. The rotation speed of the first motor is reduced to a predetermined speed by a predetermined gear and transmitted to the second hand wheel.

Similarly, the second motor of the second drive system which has received the zero-return operation instruction is rotated in the clockwise direction or the counterclockwise direction, for example, at a high speed. The rotation speed of the second motor is reduced to a predetermined speed by a predetermined gear and transmitted to the minute hand wheel. The rotation of the minute hand wheel is transmitted to the intermediate wheel by the pinion portion, is transmitted to the correction shaft via the intermediate wheel, and is transmitted to the hour wheel. At this time, since the correction shaft has the same phase as the minute hand wheel shaft portion, it rotates at the same speed as the minute hand wheel shaft portion, and the hour hand wheel rotates at the decelerated predetermined speed.

As the minute hand pipe rotates, the rotation detecting plate also rotates at the same speed as the minute hand pipe. With the rotation of the rotation detecting plate and the hour hand wheel, the second light transmitting portion of the rotation detecting plate and the first light transmitting portion of the hour hand wheel face each other and face each other. At this time, a detection signal is output from the optical sensor unit to the control system as an output signal. Thereby, the control system recognizes that the minute hand and the hour hand point to the hour. In this case, even if the minute hand wheel has a slip mechanism, the minute hand pipe and the hour hand wheel have the same phase, so that the first light transmission section and the second hand wheel are
The position directly opposed to the light transmission section of the above-mentioned position coincides with that at the time of initial setting without causing an error. Therefore, the hour positions of the minute hand and the hour hand are detected almost accurately.

During manual correction, the correction shaft is manually rotated clockwise or counterclockwise. The rotation of the correction shaft is transmitted to the shaft portion of the minute hand wheel via the intermediate wheel and to the hour hand wheel. At this time, since the shaft portion of the minute hand wheel has the same phase as the correction shaft, the minute hand wheel rotates at the same speed as the correction shaft, and the hour hand wheel rotates at the decelerated predetermined speed. As the minute hand wheel shaft rotates, the rotation detection plate also rotates at the same speed as the minute hand wheel shaft. With the rotation of this rotation detection plate and hour hand wheel,
Eventually, the second light transmitting portion of the rotation detecting plate and the first light transmitting portion of the hour hand wheel face each other and face each other. At this time, a detection signal is output from the optical sensor unit to the control system as an output signal. Thereby, the control system recognizes that the minute hand and the hour hand point to the hour. In this case, even if the minute hand wheel has a slip mechanism, the minute hand wheel shaft portion and the hour hand wheel are in the same phase, so that the front facing position of the first light transmitting portion and the second light transmitting portion is at the initial setting. And match without any error. Therefore, the hour positions of the minute hand and the hour hand are detected almost accurately.

According to the present invention, when the through hole of the hour wheel and the light reflecting surface of the rotation detecting plate face each other, the light emitted from the light emitting element of the reflective photosensor is reflected through the through hole. The light that reaches the surface and is reflected by the light reflecting surface is received by the light receiving element of the reflection type photosensor through the through hole, and when the detection signal at this time is input to the control system, the minute hand and hour hand are positive. Recognized as pointing to time.

According to the present invention, when the light-reflecting surface of the hour wheel and the through hole of the rotation detecting plate face each other, the light emitted from the light emitting element of the reflection type photosensor is reflected through the through hole. The light that reaches the surface and is reflected by the light reflecting surface is received by the light receiving element of the reflection type photosensor through the through hole, and when the detection signal at this time is input to the control system, the minute hand and hour hand are positive. Recognized as pointing to time.

According to the present invention, the light transmission section of the gear and the light transmission section of the second hand wheel are brought to face each other with the rotation of the predetermined gear and the second hand wheel. At this time, a detection signal is output from the optical sensor unit to the control system as an output signal. As a result, the control system recognizes that the second hand points to the hour.
In this case, since there is no slip mechanism of the second hand wheel, the hour position of the second hand is detected almost accurately.

[0021]

1 is a sectional view showing the overall construction of an embodiment of a pointer position detecting device for an analog 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. In the figure, 10 is a timepiece main body, 20 is a second hand drive system as a first drive system, 30 is a first reflection type optical sensor, 40 is a minute hand drive system as a second drive system, 50 is an hour hand wheel, 60 Is a back wheel of the day as an intermediate wheel, 70 is a manual correction shaft, 80 is a rotation detection plate, and 90 is a second reflection type optical sensor.

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 is composed of a first stepping motor 21, a first fifth wheel 22 and a second hand wheel 23. In the first stepping motor 21, a stator 21a is mounted on the intermediate plate 12, and a rotor 21b is pivotally supported by the intermediate plate 12 and the upper plate 13, and a rotation direction, a rotation angle, and a rotation speed are controlled by a control system (not shown). Is controlled.

The first fifth wheel & pinion 22 is rotatably supported by the middle plate 12 and the upper plate 13 and its ring teeth are meshed with the rotor 21b of the first stepping motor 21 so that the rotation speed of the rotor 21b is predetermined. Decelerate to speed. 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 wheel shaft portion 44a which penetrates a lower plate 11 to be described later and projects to the surface side where a timepiece dial and the like are formed. It is attached. The second hand wheel 23a has a second hand pinion meshed with the 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 and a light receiving element are arranged in parallel, and the light emitting portions of these light emitting elements and the light receiving surfaces of the light receiving elements are formed in a through hole 13a formed in the upper plate 13.
Through the through hole 22a of the first fifth wheel & pinion 22, and faces the surface of the second hand wheel 23 on which the light reflecting surface 23b is formed. In the first reflection type photosensor 30, the light emitted from the light emitting element is transmitted through the through holes 13a, 2
The second hand wheel 23 is reached via 2a, and the light reflecting surface 23
A high-level detection signal is output to a control system (not shown) only when the light reflected by b is received by the light receiving element through the through holes 13a and 22a.

The minute hand drive system 40 is composed of a second stepping motor 41, a second fifth wheel & pinion 42, a third wheel & pinion 43 and a minute hand wheel 44. In the second stepping motor 41, a stator 41a is mounted on the lower plate 11, and a rotor 41b is pivotally supported by the lower plate 11 and the upper plate 13, and a rotation direction, a rotation angle, and a rotation speed are controlled by a control system (not shown). Is controlled.

The second fifth wheel & pinion 42 is rotatably supported by the middle plate 12 and the upper plate 13, and its ring tooth portion is meshed with the rotor 41b of the second stepping motor 41 so that the rotation speed of the rotor 41b is predetermined. Decelerate to speed.

The third wheel & pinion 43 is arranged such that one end of the shaft portion thereof is axially supported by the upper plate 13 and the other end side thereof penetrates the middle plate 12, and the wheel tooth portion is the second fifth wheel & pinion 41. 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 central portion, one end of a minute hand pipe 44a is pivotally supported by the middle plate 12, and the other end side shaft portion 44a is the lower plate 11. Is inserted into a through hole 50b of an hour hand pipe 50a of an hour hand wheel 50 which protrudes to the surface side where a dial of a watch is formed, and a minute hand (not shown) is attached to its tip. The minute hand wheel 44 is configured to rotate once every 60 minutes, and as described above, the second hand shaft 23a is inserted through the through hole 44b, and the ring tooth portion thereof is the third wheel 43.
It is meshed with the kana part of. Such a minute hand wheel 44 is
This means that it has 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, the ring tooth portion is disposed 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.

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.
It is meshed with the wheel teeth of the wheel, and the rotation speed of the minute wheel 44 is reduced to a predetermined speed and transmitted to the hour wheel 50. In addition, the back wheel 60 of the day 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 the The part is 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 pinion 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 inactive, the head 70b is rotated to manually move the pointer position. It is configured to be modifiable.

The rotation detecting plate 80 has a disk shape, and the central portion thereof rotates in response to the rotation of the minute hand wheel 44, so that the shaft portion 44a of the minute hand wheel 44 between the minute hand wheel 44 and the hour hand wheel 50 is formed. It is fixed by making the axes substantially coincide with. Further, in a part of the area of the rotation detecting plate 80 facing the surface 50c of the hour hand wheel 50, a light reflecting surface 80a as a second light transmitting portion is provided so as to face the through hole 50d as shown in FIG. Has been formed.

In the second reflection type photosensor 90, a light emitting element and a light receiving element are arranged in parallel, and the light emitting portion of these light emitting elements and the light receiving surface of the light receiving element are through holes 11c formed in the lower plate 11.
Through the through hole 50d formed in the hour wheel 50, and the surface 8 on which the light reflection surface 80a of the rotation detection plate 80 is formed.
It is arranged on the lower plate 11 so as to face 0b. In the second reflective photosensor 90, the light emitted from the light emitting element is
It reaches the surface 80b of the rotation detection plate 80 through the through hole 50d,
Further, only when the light reflected by the light reflecting surface 80a is received by the light receiving element through the through hole 50d, the high level detection signal is output to the control system (not shown).

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.

Next, the operation of the above configuration will be described. For example, when an hourly signal from a radio station is received by a radio wave reception system (not shown), the second hand drive system 20 is transmitted from a control system (not shown).
And a zero-return operation instruction is sent to the minute hand drive system 40. The first stepping motor 21 of the second hand drive system 20 that has received the zero-return operation instruction is rotated in the clockwise direction or the counterclockwise direction, for example, at a high speed. The rotation speed of the rotor 21b of the first stepping motor 21 is reduced to a predetermined speed by the first fifth wheel & pinion 22 and transmitted to the second hand wheel 23.

With the rotation of the first fifth wheel & pinion 22 and the second hand wheel 23, the light reflecting surface 23b of the second hand wheel 23 and the first
The through hole 22a of the fifth wheel & pinion 22 is in a state of facing and directly facing each other. At this time, the light emitted from the light emitting element of the first reflective photosensor 30 reaches the light reflecting surface 23b of the second hand wheel 23 through the through holes 13a and 22a and is reflected there. This reflected light is received by the light receiving element through the through holes 13a and 22a. As a result, a high level detection signal is output to a control system (not shown). As a result, the control system recognizes that the second hand (not shown) indicates the hour. In this case, since there is no slip mechanism of the second hand wheel, the hour position of the second hand is detected almost accurately.

Similarly, the second stepping motor 41 of the minute hand drive system 40 which has received the zero-return operation instruction is rotated in the clockwise direction or the counterclockwise direction, for example, at a high speed.
The rotation speed of the rotor 41b of the second stepping motor 41 is reduced to a predetermined speed by the second fifth wheel & pinion 42, further reduced by the third wheel & pinion 43, and transmitted to the minute hand wheel 44.

The rotation of the minute hand wheel 44 depends on the minute hand pinion 44a.
Is transmitted to the date driving wheel 60, is transmitted to the correction pinion 70a of the manual correction shaft 70 via the wheel teeth of the date driving wheel 60, and is also transmitted to the hour hand wheel via the shaft portion of the date driving wheel 60. 5
Transmitted to 0. At this time, since the manual correction shaft 70 is in phase with the minute hand pinion 44a of the minute hand wheel 44, the minute hand wheel 44
The hour hand wheel 50 rotates at a decelerated predetermined speed.

With the rotation of the minute hand pipe 44a, the rotation detecting 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 of the second reflective photosensor 90 reaches the light reflecting surface 80a of the rotation detecting plate 80 through the through hole 50d and is reflected there. This reflected light is received by the light receiving element through the through hole 50d. As a result, a high level detection signal is output to a control system (not shown). Thereby, the control system recognizes that the minute hand and the hour hand (not shown) point to the hour. In this case, although the minute hand wheel 44 has a slip mechanism, the minute hand pipe 44 of the minute hand wheel 44 is used.
Since a and the hour hand wheel 50 have the same phase, the facing positions of the through hole 50d and the light reflecting surface 80a coincide with each other at the time of initial setting without causing an error. Therefore, the hour positions of the minute hand and the hour hand are detected almost accurately.

During manual correction, the head portion 70b of the manual correction shaft 70 is manually rotated clockwise or counterclockwise. Rotation of the manual correction shaft 70
It is transmitted to the minute hand pipe 44a of the minute hand wheel 44 through 0 and is transmitted to the hour hand wheel 50 through the shaft portion of the day 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 of the second reflective photosensor 90 reaches the light reflecting surface 80a of the rotation detecting plate 80 through the through hole 50d and is reflected there. This reflected light is received by the light receiving element through the through hole 50d. As a result, a high level detection signal is output to a control system (not shown). Thereby, the control system recognizes that the minute hand and the hour hand (not shown) point to the hour. In this case, although the minute hand wheel 44 has a slip mechanism, since the shaft portion 44a of the minute hand wheel 44 and the hour hand wheel 50 are in the same phase, the through hole 50d and the light reflecting surface 8 are formed.
The facing position of 0a coincides with that at the time of initial setting without causing an error. Therefore, the hour positions of the minute hand and the hour hand are detected almost accurately.

As described above, according to this embodiment,
The minute hand pipe 44a of the minute hand wheel 44, the shaft portion 70a of the manual correction shaft 70, and the ring tooth portion of the day wheel 60 are meshed with each other to bring the minute hand pipe 44a of the minute hand wheel 44 and the manual correction shaft 70 into the same phase, When the through hole 50d is provided at a predetermined position of the hour hand wheel 50 and the rotation detecting plate 80 having the light reflecting surface 80a is attached to the minute hand pipe 44a, the through hole 50d and the light reflecting surface 80a are directly opposed to each other. Is set as the hour and the second reflection type optical sensor 90 detects the time when the reflected light of the light reflecting surface 80a is received through the through hole 50d as the hour position. There is no need to form holes for sensors, and it does not spoil the appearance.
There is no need for troublesome work such as position adjustment for each exterior. Further, since the minute hand pipe 44a of the minute hand wheel 44 and the manual correction shaft 70 and the hour hand wheel 50 have the same phase, even if there is a minute hand slip mechanism, the rotation detecting plate 8
The front facing position of the light reflection surface 80a of 0 and the through hole 50d of the hour wheel 50 is not displaced. Therefore, even if the pointer position is manually corrected, no phase shift occurs,
Highly accurate position detection can be realized. Further, since the detection is performed once every 12 hours, it is possible to handle not only the hour signal but also the time code signal.

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.

Further, in the present embodiment, the hour wheel 50 is formed with one through hole so as to be detected once every 12 hours. However, as shown in FIG. 4, for example, as shown in FIG. It is also possible to form the through holes 50d at 11 positions except one position divided into 12 equal parts by 30 °. As a result, the detection cycle can be shortened when a reception error occurs. That is, the correction can be performed a plurality of times within a predetermined time, and a highly accurate timepiece as a whole can be provided.

[0047]

As described above, according to the present invention,
It is not necessary to form holes for the sensor on the dial or the exterior, no complicated labor is required, and the appearance is not spoiled. Further, even if the pointer position is manually corrected, a phase shift does not occur, and highly accurate position detection can be realized. By forming the plurality of first light transmitting portions in the hour wheel, the detection cycle can be shortened when a reception error occurs. That is, the correction can be performed a plurality of times within a predetermined time, and a highly accurate timepiece as a whole can be provided.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an overall configuration of an embodiment of a pointer position detecting device for an analog 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 diagram showing an example of a formation pattern of a light reflecting surface of the rotation detecting plate according to the present 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.

[Explanation of symbols]

 10 ... Clock body 11 ... Lower plate 12 ... Middle plate 13 ... Upper plate 20 ... Second hand drive system (first drive system) 21 ... First stepping motor 22 ... Second fifth wheel 22a ... Through hole 23 ... Second hand Vehicle 23b ... Light reflection surface 30 ... First reflection type optical sensor 40 ... Minute hand drive system (second drive system) 41 ... Second stepping motor 42 ... Second fifth wheel 43 ... Third wheel 44 ... Minute hand Car 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 optical sensor

Claims (6)

[Claims] 1. A first drive system for rotating the second hand wheel by decelerating the rotation speed of a first motor to a predetermined speed by at least one gear, and a rotation speed of a second motor by at least one gear. The second drive system that rotates the minute hand wheel by decelerating it to a predetermined speed, the hour hand wheel that has the first light transmission portion formed at a predetermined position, and the rotation speed of the minute hand pipe are reduced to a predetermined speed. An intermediate wheel that rotates the hour hand wheel, a correction shaft that meshes with the intermediate wheel and is manually rotatable in the same phase as the minute hand wheel shaft portion, and faces the formation area of the first light transmission portion of the hour hand wheel. Output when the rotation detecting plate provided on the minute hand pipe and having the second light transmitting portion formed at a predetermined position and the first light transmitting portion and the second light transmitting portion face each other. A pointer position detection of a watch characterized by having an optical sensor unit for obtaining a signal. Output device. 2. The timepiece according to claim 1, wherein the first light transmitting portion of the hour hand wheel is formed in at least one of 11 positions divided into 12 equal parts in the circumferential direction of the hour hand wheel. Pointer position detector. 3. The first light transmitting portion is a light transmitting portion, the second light transmitting portion is a light reflecting surface, and the light sensor portion is constituted by a reflection type light sensor, and the light transmitting portion is provided through the light transmitting portion. The pointer position detecting device for a timepiece according to claim 1 or 2, which is arranged so as to transmit and receive light to and from the rotation detecting plate. 4. The first light transmitting portion is a light reflecting surface, and the second light transmitting portion is a light reflecting surface.
2. The light transmission part of is transparent, and the optical sensor part is constituted by a reflection type optical sensor, and is arranged so as to transmit and receive light to and from the rotation detection plate through the through hole. Alternatively, the pointer position detecting device for a timepiece according to claim 2. 5. The first light transmitting portion and the second light transmitting portion are through holes, and the optical sensor portion is formed of a transmissive optical sensor, and light is transmitted and received through the through holes. The pointer position detecting device for a timepiece according to claim 1 or 2, which is arranged so as to perform. 6. A light transmission section is provided at a predetermined position of a gear wheel having a second hand wheel and a surface facing the second hand wheel and transmitting the rotation of the first motor to the second hand wheel, and the respective light transmission sections face each other. The timepiece position detecting device for a timepiece according to claim 1, 2, 3, 4, or 5, further comprising an optical sensor section for sometimes obtaining an output signal.