JP2546364Y2 - Clock hand position detector - Google Patents

Description

[Detailed description of the invention]

[0001]

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

[0002]

2. Description of the Related Art A radio-controlled timepiece has a function of receiving an hourly signal of a predetermined frequency emitted from a radio station and performing a so-called zero return based on the received signal. In order to accurately adjust the position of the pointer to the correct time, a pointer position detecting device is provided.

As a conventional pointer position detecting device of this type, for example, a light-emitting element and a light-receiving element of an optical sensor are arranged at predetermined positions on a timepiece dial, a pointer or glass, and light emitted from the light-emitting element is directly transmitted. Alternatively, there has been proposed a type in which light reflected by a reflector is indirectly received by a light receiving element to detect a pointer position, and a type using a magnet and a magnetic sensitive element in place of the light emitting element and the light receiving element ( See, for example, Japanese Utility Model Laid-Open No. 51-149672 and JP-A-52-46850. A timepiece equipped with these devices can also manually correct the position of the hands.

Conventionally, as disclosed in Japanese Patent Application Laid-Open No. 61-118683, through holes are formed in each gear of the wheel train in the drive system for the second hand and each gear in the wheel train in the drive system for the minute and hour hands. The light-emitting element and the light-receiving element are opposed to each other through the through-hole, and when light emitted from the light-emitting element is directly opposed to each of the through-holes and received by the light-receiving element, for example, the hand position detection is detected as the hour. Devices have also been proposed.

[0005]

However, in the former pointer position detecting device described above, since it is necessary to provide a hole for a sensor or a reflection plate on a decorative dial or an exterior, the appearance of the pointer deteriorates. . In addition, since the number of exterior parts of the timepiece is large, the positioning of the sensor must be performed for each product, so that there is a drawback in that complicated work is required.

[0006] On the other hand, the latter pointer position detecting device does not require complicated adjustment and does not impair the appearance. However, when manual correction is performed, the minute hand wheel is provided with a minute hand slip mechanism. Therefore, there is a problem that a shift between the position of the through hole and the initial set position occurs, that is, a so-called phase shift occurs, so that highly accurate position detection cannot be performed.

[0007] The present invention has been made in view of such circumstances, and its purpose is to eliminate the need for complicated work, to have no effect on the appearance, and even to correct the position of the pointer manually. It is an object of the present invention to provide a timepiece hand position detecting device which does not cause a phase shift.

[0008]

In order to achieve the above object, according to the present invention, a first drive system for rotating a second hand wheel by reducing the rotation speed of a first motor to a predetermined speed by at least one gear. A second drive system for rotating the minute wheel by reducing the rotation speed of the second motor to a predetermined speed by at least one gear, and 1 for N hours (N is a positive integer).
It is rotatable, reduces the rotation speed of the minute hand pipe to a predetermined speed, rotates the hour wheel, and meshes with the intermediate wheel having the first light transmitting portion formed at a predetermined position, and is manually engaged with the intermediate wheel. A correction shaft rotatable in phase with the center hand wheel portion; and a second light transmission portion provided at a predetermined position on the correction shaft so as to face a formation region of the first light transmission portion of the intermediate wheel. Are formed, and an optical sensor unit that obtains an output signal when the first light transmission unit and the second light transmission unit face each other.

In the present invention, the first light transmitting portions of the intermediate wheel are formed at positions equally divided by N in the circumferential direction of the intermediate wheel.

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, the optical sensor portion is constituted by a reflection type optical sensor, and the through hole is formed. The rotation detection plate was arranged to transmit and receive light via the rotation detection plate.

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, the optical sensor portion is constituted by a reflection type optical sensor, and the through hole is formed. The rotation detection plate was arranged to transmit and receive light via the rotation detection plate.

In the present invention, the first light transmitting portion and the second light transmitting portion are formed as through holes, and the optical sensor portion is constituted by a transmission type optical sensor, and light is transmitted through the respective through holes. It was arranged to give and receive.

In the present invention, a light transmission unit 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. An optical sensor unit that obtains an output signal when the operation is performed is provided.

[0014]

According to the present invention, for example, when an hour signal from a radio station is received, a return-to-zero 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 return-to-zero operation instruction is rotated clockwise or counterclockwise, 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 that has received the return-to-zero operation instruction is rotated clockwise or counterclockwise, 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. The rotation of the minute hand is transmitted to the intermediate wheel by the minute hand pinion, transmitted to the correction shaft via the intermediate wheel, and transmitted to the hour wheel. At this time, since the correction shaft has the same phase as the minute hand pipe, it rotates at the same speed as the minute hand axle, and the hour wheel rotates at the reduced speed.

With the rotation of the correction shaft, the rotation detecting plate also rotates at the same speed as the correction shaft. With the rotation of the rotation detecting plate and the intermediate wheel, the second light transmitting portion of the rotation detecting plate and the first light transmitting portion of the intermediate wheel eventually 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 correction shaft have the same phase.
Of the light transmission unit coincides with the initial setting without any error. Therefore, the exact positions of the minute hand and the hour hand are detected almost accurately.

In manual correction, the correction axis is manually rotated clockwise or counterclockwise. The rotation of the correction shaft is transmitted to the shaft portion of the minute wheel via the intermediate wheel and to the hour wheel. At this time, since the shaft portion of the minute hand wheel has the same phase as the correction shaft, it rotates at the same speed as the correction shaft, and the hour wheel rotates at the reduced speed. With the manual rotation of the correction axis, the rotation detection plate also rotates at the same speed as the correction axis. With the rotation of the rotation detecting plate and the intermediate wheel, the second light transmitting portion of the rotation detecting plate and the first light transmitting portion of the intermediate wheel eventually 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 correction shaft have the same phase, so that the directly facing positions of the first light transmitting portion and the second light transmitting portion are set at the time of the initial setting. And no error occurs. Therefore, the exact positions of the minute hand and the hour hand are detected almost accurately.

According to the present invention, when the light reflecting surface of the intermediate 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 optical sensor is reflected through the through hole. The light reaching the surface and reflected by the light reflecting surface is received by the light receiving element of the reflection type optical sensor through the through hole, and when the detection signal at this time is input by the control system, the minute hand and the hour hand are correct. It is recognized that it points to time.

According to the present invention, when the through hole of the intermediate wheel and the light reflecting surface of the rotation detecting plate face each other, the light emitted from the light emitting element of the reflection type optical sensor is reflected through the through hole. The light reaching the surface and reflected by the light reflecting surface is received by the light receiving element of the reflection type optical sensor through the through hole, and when the detection signal at this time is input by the control system, the minute hand and the hour hand are correct. It is recognized that it points to time.

According to the present invention, with the rotation of the predetermined gear and the second hand wheel, the light transmitting portion of the gear and the light transmitting portion of the second hand wheel eventually come to 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 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]

FIG. 1 is a sectional view showing an entire configuration of an embodiment of a hand position detecting device for an analog timepiece according to the present invention, and FIG. 2 is a plan view of a main part of the hand position detecting device according to the present invention. In the figure, 10 is a timepiece body, 20 is a second hand drive system as a first drive system, 30 is a first reflective optical sensor, 40 is a minute hand drive system as a second drive system, 50 is an hour hand wheel, 60 Denotes a minute wheel as an intermediate wheel, 70 denotes a manual correction shaft, 80 denotes a rotation detecting plate, and 90 denotes a second reflection type optical sensor.

The timepiece body 10 has a middle plate 12 disposed substantially at the center of a space formed by the lower plate 11 and the upper plate 13.
With respect to predetermined positions of the lower plate 11, the middle plate 12, and the upper plate 13 in the space, the second hand drive system 20, the first reflection type optical sensor 30,
The second drive system 40, the hour wheel 50, the minute wheel 60, the manual correction shaft 70, and the 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. The first stepping motor 21 has a stator 21a mounted on the lower plate 11, a rotor 21b supported by the lower plate 11 and the upper plate 13, and a rotation direction, a rotation angle and a rotation speed by a control system (not shown). Is controlled.

The first fifth wheel & pinion 22 is rotatably supported by the lower plate 11 and the upper plate 13, and its wheel teeth are meshed with the rotor 21 b of the first stepping motor 21 to control the rotation speed of the rotor 21 b to a predetermined value. Decelerate to speed. This first fifth car 22
Is rotated, for example, once every 15 seconds, and a slit-shaped through-hole 22 a is formed in a part of the overlapping region with the second hand wheel 23.

The second hand wheel 23 has one end of its shaft portion
The other end penetrates the middle plate 12 to the lower plate 11 side,
A second hand shaft 23a is connected to the other end. The second hand shaft 23a is inserted through 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 on which a timepiece dial and the like are formed. Can be The second hand wheel 23a is meshed with the pinion of the first fifth wheel & pinion 22 so that the second wheel 23a rotates once every 60 seconds. 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 & pinion 22 so as to face the through hole 22a formed in the first fifth wheel & pinion 22. I have. Such a second hand drive system 20 includes a light reflecting surface 23b.
The second hand points to the right hour when is overlapped with the through hole 22a, that is, when the second hand faces right.

In the first reflection type optical sensor 30, a light emitting element and a light receiving element are provided side by side, and a light emitting portion of the light emitting element and a light receiving surface of the light receiving element are formed in a through hole 13a formed in the upper plate 13.
The second hand wheel 23 is disposed on the upper plate 13 so as to face the surface on which the light reflecting surface 23b of the second hand wheel 23 is formed through the through hole 22a of the first fifth wheel & pinion 22. The first reflection type optical sensor 30 is configured such that light emitted from the light emitting element is transmitted through the through holes 13a and 13a.
2a, the second hand wheel 23 is reached, and the light reflecting surface 23
Only when the light reflected by b is received by the light receiving element through the through holes 13a and 22a, a high-level detection signal is output to a control system (not shown).

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

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 41 b of the second stepping motor 41 to control the rotation speed of the rotor 41 b to a predetermined value. Decelerate to speed.

The third wheel & pinion 43 is provided with one end of the pinion pivotally supported by the upper plate 13 and the other end thereof penetrating through the middle plate 12. It is meshed with the shaft.

The minute hand wheel 44 has a substantially T-shape having a through hole 44b formed in the center thereof. One end of a minute hand pipe 44a is pivotally supported by the middle plate 12, and the minute hand pipe 44a on the other end side is connected to the lower plate 11a. The hour hand wheel 50 is inserted through a shaft portion of the hour wheel 50 that protrudes to the surface side on which the timepiece dial and the like are formed. The minute hand wheel 44
The second hand shaft 23a is inserted through the through-hole 44b as described above, and its ring tooth portion is engaged with the pinion portion of the third wheel & pinion 43 as described above. ing. Such a minute hand wheel 44 has a so-called slip mechanism.

The hour wheel 50 has a substantially T-shape having a through hole 50b formed in the center thereof, and its ring teeth are disposed in the body 10 of the watch. The hour hand (not shown) is attached to the end of the dial. The hour hand wheel 50 is configured to rotate 30 degrees in one hour and one rotation in 12 hours.
Further, as described above, the minute hand pipe 44 is provided in the through-hole 50b.
a is inserted.

The minute wheel 60 is rotatably supported by a projection 11a formed on the lower plate 11, and has a ring-shaped tooth portion.
No. 4 is engaged with the minute hand pipe 44a, and the shaft is meshed with the ring teeth of the hour wheel 50. The rotation speed of the minute wheel 44 is reduced to a predetermined speed and transmitted to the hour wheel 50. In addition, the minute wheel 60 is configured to make one rotation at 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 disposed so as to face a part of the rotation detection plate 80. As shown in FIG. 3, first light transmission is performed on a surface 60 a of the minute wheel 60 facing the rotation detection plate 80 in a radial direction at a position equally divided by N (4 in this embodiment) in the circumferential direction. Light reflecting surfaces 60b are formed as parts.

The manual correction shaft 70 has a substantially T-shape, and the correction pin 70a at the tip thereof has an opening 1 formed in the upper plate 13.
Projection 11b formed on lower plate 11 with 3b inserted
, And the head 70 b is disposed in a state of protruding from the upper plate 13 to the outside of the timepiece body 10. The manual correction shaft 70 is configured to rotate once every 60 minutes in the same phase as the minute hand wheel 44, and as described above, the correction
a, the wheel teeth of the minute wheel 60 are meshed with each other,
When the minute hand wheel 44 is driven by 0, it rotates in the same phase as the minute hand wheel 44 via the minute wheel 60, and when the minute hand drive system 40 is not operated, the head 70b is rotated to manually adjust the hand position. It is configured to be modifiable.

The rotation detecting plate 80 is formed in a disk shape, and its central portion rotates in accordance with the rotation of the manual correction shaft 70.
The manual correction shaft 70 is fixed so that its axis substantially coincides with the correction pinion 70a. A light reflecting surface 60 is provided on a part of a region of the rotation detecting plate 80 facing the surface 60a of the minute wheel 60.
b through hole 80 as a second light transmitting portion so as to face
a is formed.

In the second reflection type optical sensor 90, a light emitting element and a light receiving element are provided side by side, and the light emitting portion of the light emitting element and the light receiving surface of the light receiving element are formed with through holes 80a formed in the rotation detecting plate 80. It is arranged on the inner surface side of the upper plate 13 so as to face the surface 60a on which the light reflecting surface 60b of the minute wheel 60 is formed. The second reflection type optical sensor 90 is configured such that light emitted from the light emitting element is transmitted to the surface 60 of the minute wheel 60 through the through hole 80a.
a, and outputs a high-level detection signal to a control system (not shown) only when the light that has reached “a” and is reflected by the light reflecting surface 60b is received by the light receiving element through the through hole 80a.

The relationship between the light reflecting surface 60b of the minute wheel 60 and the through hole 80a of the rotation detecting plate 80 is as follows.
The minute hand and the hour hand (not shown) are set so as to point to the correct hour when is facing the through hole 80a.

Next, the operation of the above configuration will be described. For example, when an hour signal from a radio station is received by a radio wave reception system (not shown), a second hand drive system 20
A return-to-zero 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 return-to-zero operation instruction is rotated in a clockwise direction or a counterclockwise direction, for example, at a high speed. The rotation speed of the rotor 21 b 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 22 and the second hand wheel 23, the light reflecting surface 23b of the second hand wheel 23 and the first
And the through hole 22a of the fifth wheel & pinion 22 faces each other and faces each other. At this time, light emitted from the light emitting element of the first reflective optical sensor 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). Thereby, the control system recognizes that the second hand (not shown) 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.

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

The rotation of the minute hand wheel 44 depends on the minute hand pipe 44
a to the correction wheel 70a of the manual correction shaft 70 via the wheel teeth of the minute wheel 60, and the hour hand through the shaft of the minute wheel 60. It is transmitted to the car 50. At this time, since the manual correction shaft 70 has the same phase as the minute hand pipe 44a of the minute hand wheel 44, it rotates at the same speed as the minute hand wheel 44, and the hour wheel 50 rotates at a reduced speed.

With the rotation of the manual correction shaft 70, the rotation detection plate 80 also rotates at the same speed as the manual correction shaft 70. With the rotation of the rotation detecting plate 80 and the minute wheel 60, the through hole 80 a of the rotation detecting plate 80 and one light reflecting surface 60 b of the minute wheel 60 eventually face each other and face each other. At this time, the light emitted from the light emitting element of the second reflective optical sensor 90 reaches the light reflecting surface 60b of the minute wheel 60 via the through hole 80a and is reflected there. This reflected light is received by the light receiving element through the through hole 80a. 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, the minute hand wheel 44 has a slip mechanism.
Since a and the manual correction axis 70 have the same phase, the opposing positions of the through hole 80a and the light reflecting surface 60b coincide with those at the time of the initial setting without any error. Therefore, the exact positions of the minute hand and the hour hand are detected almost accurately.

During manual correction, the head 70b of the manual correction shaft 70 is manually rotated clockwise or counterclockwise. The rotation of the manual correction shaft 70 is controlled by the minute wheel 6
It is transmitted to the minute hand pipe 44a of the minute hand wheel 44 via the zero and to the hour hand wheel 50 via the shaft portion of the minute wheel 60. At this time, since the minute hand pipe 44a of the minute hand wheel 44 has the same phase as the manual correction shaft 70, the minute hand pipe 44a rotates at the same speed as the manual correction shaft 70, and the hour hand wheel 50 rotates at a predetermined reduced speed.

With the manual rotation of the manual correction shaft 70,
The rotation detection plate 80 also rotates at the same speed as the manual correction shaft 70.
With the rotation of the rotation detecting plate 80 and the minute wheel 60, the through hole 80 a of the rotation detecting plate 80 and one light reflecting surface 60 b of the minute wheel 60 eventually face each other and face each other. At this time, the light emitted from the light emitting element of the second reflective optical sensor 90 reaches the light reflecting surface 60b of the minute wheel 60 via the through hole 80a and is reflected there. This reflected light is received by the light receiving element through the through hole 80a. 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, the minute hand wheel 44 has a slip mechanism.
4a and the manual correction shaft 70 have the same phase, so that the opposing positions of the through-hole 80a and the light reflecting surface 60b are the same as those at the time of the initial setting without any error. Therefore, the exact positions of the minute hand and the hour hand are detected almost accurately.

As described above, according to this embodiment,
The minute hand of the minute hand wheel 44 is engaged with the minute hand pipe 44a of the minute hand wheel 44, the correction pinion 70a of the manual correction shaft 70, and the ring tooth portion of the minute wheel 60 having the light reflecting surface 60b formed at a predetermined position. The pipe 44a and the manual correction shaft 70 have the same phase, the rotation detection plate 80 having the through hole 80a is attached to the manual correction shaft 70, and the time when the through hole 80a and the light reflecting surface 60b face each other is positive. And the second reflection type optical sensor 9
0, the time when the reflected light from the light reflecting surface 60b is received through the through hole 80a is detected as the positive position. Therefore, it is not necessary to form a sensor hole in the dial or the exterior, and the appearance is improved. The appearance is not impaired, and there is no need for complicated work such as adjusting the position of each exterior. Also, since the minute hand pipe 44a of the minute hand wheel 44 and the manual correction shaft 70 are in phase, even if the minute hand slip mechanism is provided, the through hole 80a of the rotation detecting plate 80 and the minute wheel 60
Of the light reflecting surface 60b does not shift. Therefore, even if the pointer position is manually corrected, no phase shift occurs, and highly accurate position detection can be realized.

In this embodiment, the minute wheel 60
The rotation detecting plate 80 is formed with a light reflecting surface, and the rotation detecting plate 80 is formed with a through hole. However, the present invention is not limited to this. The same effect as described above can be obtained even when the reflective surface is formed and the second reflective optical sensor 90 is arranged on the lower plate 11 side. In this embodiment, the example using the reflection type optical sensor 90 has been described. However, the transmission type optical sensor is used by forming through holes in both the minute wheel 60 and the rotation detection plate 80. It is also possible to achieve the same effect as described above.

[0046]

[Effects of the Invention] As described above, according to the present invention,
There is no need to form a sensor hole in the dial or exterior, no need for complicated labor, and no loss of appearance. Further, even if the pointer position is manually corrected, no phase shift occurs, and highly accurate position detection can be realized.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an entire configuration of an embodiment of a hand position detecting device for an analog timepiece according to the present invention.

FIG. 2 is a plan view of a main part of the 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 minute wheel according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Watch main body 11 ... Lower plate 12 ... Middle plate 13 ... Upper plate 20 ... Second hand drive system (1st drive system) 21 ... 1st stepping motor 22 ... 2nd 5th wheel 22a ... Through hole 23 ... Second hand Car 23b Light reflecting surface 30 First reflection type optical sensor 40 Minute hand drive system (second drive system) 41 Second stepping motor 42 Second 5th wheel 43 Third wheel 44 Minute hand Car 44a: minute hand pipe 50: hour hand wheel 50a: hour hand pipe 60: minute wheel (intermediate wheel) 60b: light reflecting surface 70: manual correction shaft 80: rotation detection plate 80a: through hole 90: second reflective light Sensor

Claims (6)

(57) [Scope of request for utility model registration] 1. A first drive system for rotating a second hand wheel by reducing a 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. A second drive system for decelerating the hour hand to a predetermined speed and rotating the minute wheel, and capable of making one revolution in N hours (N is a positive integer), reducing the rotation speed of the minute hand pipe to the predetermined speed to reduce the hour wheel Rotate
An intermediate wheel having a first light transmission portion formed at a predetermined position; a correction shaft meshed with the intermediate wheel, which can be manually rotated in phase with the minute hand axle; and a first light of the intermediate wheel. A rotation detection plate provided on the correction shaft so as to face the formation region of the transmission unit and having a second light transmission unit formed at a predetermined position; a first light transmission unit and the second light transmission A timepiece hand position detecting device, comprising: an optical sensor unit that obtains an output signal when the unit faces directly. 2. The timepiece hand position detecting device according to claim 1, wherein the first light transmitting portions of the intermediate wheel are formed at positions equally divided by N in the circumferential direction of the intermediate wheel. 3. The first light transmitting portion is a light reflecting surface and a second light transmitting portion.
2. The light transmitting section of claim 1, wherein the light transmitting section is a through hole, and the optical sensor section is constituted by a reflection type optical sensor, and is arranged so as to transmit and receive light to and from the rotation detecting plate through the through hole. A timepiece pointer position detecting device according to claim 2. 4. The first light transmitting section is a through hole, the second light transmitting section is a light reflecting surface, and the optical sensor section is constituted by a reflection type optical sensor, and is provided through the through hole. 3. The timepiece hand position detecting device according to claim 1, wherein said hand position is arranged to transmit and receive light to and from said rotation detecting plate. 5. The first light transmitting section and the second light transmitting section are through holes, and the optical sensor section is constituted by a transmission type optical sensor, and transmits and receives light through each of the through holes. The timepiece hand position detecting device according to claim 1 or 2, wherein the timepiece hand position detecting device is arranged to perform the operation. 6. A second hand wheel and a light transmitting portion provided at a predetermined position of 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 faces each other. 6. The timepiece hand position detecting device according to claim 1, further comprising an optical sensor for obtaining an output signal.