JP2002071841A - Automatic correction clock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic correction clock capable of correcting time in short time, driving a hour hand and a minute hand by a motor. SOLUTION: This clock is provided with a normally and reversely rotatable motor 1, a first sun gear 2 rotated and driven by the motor 1, a first planetary gear 3 always engaged with the first sun gear 2, a first intermediate wheel 4 and a second intermediate wheel 5 which are arranged on a revolutional orbit of the first planetary gear 3 and are engaged selectively by revolution of the first planetary gear 3, a second sun gear 6 always engaged with the first intermediate wheel 4, a second planetary gear 7 always engaged with the second sun gear 6, a hour hand wheel 8 which is arranged on a revolutional orbit of the second planetary gear 7 and is always engaged with the second intermediate wheel 5 and a minute hand wheel 9 provided coaxially with the hour hand wheel 8. Energizing force is applied to the second planetary gear 7 so as to be isolated from the hour hand wheel 8 and the minute hand wheel 9. The second planetary gear 7 is engaged with the hour hand wheel 8 and the minute hand wheel 9 by revolution against the energizing force.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art There are automatic timepieces in which the hour hand and minute hand are driven by one motor, and in which the hour hand and minute hand are driven by another motor.

[0003] When the hour hand and the minute hand are driven by one motor, the rotor is moved by one step at intervals of 10 seconds, and the fifth wheel meshes with the rotor, and the third wheel, minute hand, minute wheel, and the third wheel that mesh sequentially. The rotation of the motor is decelerated by the train wheel constituted by the hour hand wheel to drive the hour hand and the minute hand.

On the other hand, an apparatus that drives the hour hand and the minute hand by different motors includes an hour hand drive system and a minute hand drive system. The hour hand drive system drives the rotor one step at 2 minute intervals, and drives the hour hand by decelerating the rotation of the motor with a wheel train consisting of a fifth wheel meshing with the rotor, a third wheel meshing with the rotor sequentially, and an hour wheel. I do. The minute hand drive system feeds the rotor one step at 10 second intervals, and drives the minute hand by decelerating the rotation of the motor by a wheel train consisting of a fifth wheel meshing with the rotor, a third wheel meshing with the rotor sequentially, and a minute wheel. I do.

[0005]

When the hour hand and the minute hand are driven by one motor, it takes time to correct the time. Since the hour hand and the minute hand are linked, the minute hand must be rotated 12 times to rotate the hour hand once.

On the other hand, when the hour hand and the minute hand are driven by different motors, the hour hand and the minute hand can be driven independently, so that the time can be corrected in a short time. However, on the other hand, since there are two motors, that much space is required and the cost is high.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide an automatic timepiece that can correct the time in a short time while driving the hour hand and the minute hand with one motor. I do.

[0008]

The invention described in claim 1 of the present application is an automatic correction timepiece that drives an hour hand and a minute hand with a single motor, and includes a motor capable of rotating forward and backward, and a rotational drive by the motor. A first sun gear, a first planetary gear that always meshes with the first sun gear, and a first intermediate member that is disposed on the orbit of the first planetary gear and is selectively meshed with the revolution of the first planetary gear. A second sun gear that is always meshed with the first intermediate wheel, a second planetary gear that is always meshed with the second sun gear, and a second planetary gear that is arranged on the orbit of the second planetary gear. The vehicle has an hour wheel that always meshes with the second intermediate wheel, and a minute wheel provided coaxially with the hour wheel. The second planetary gear is biased so as to be isolated from the hour wheel and the minute wheel. Engage with hour and minute hands by revolving against urging force It is an automatic timepiece formed.

In the present invention, when the first planetary gear revolves around the first sun gear and rotates the rotor in such a direction as to mesh with the first intermediate wheel, the rotation of the rotor is changed to the first sun gear and the first sun gear. The planetary gear, the first intermediate wheel, the second sun gear, and the second planetary gear are sequentially transmitted. The second planetary gear revolves around the second sun gear, meshes with the hour and minute hands against the urging force, and drives the hour and minute hands. The second intermediate wheel that meshes with the hour wheel idles.

Conversely, when the first planetary gear revolves around the first sun gear and rotates the rotor in such a direction as to mesh with the second intermediate wheel, the rotation of the rotor is changed to the first sun gear and the first planetary gear. The gear and the second intermediate wheel are sequentially transmitted, and the second intermediate wheel drives only the hour hand. First intermediate wheel, second sun gear and second
Since the rotation of the rotor is not transmitted to the planetary gear, the second planetary gear is separated from the hour and minute hands by the biasing force.

Therefore, according to the present invention, by changing the rotation direction of the rotor, it is possible to switch between the case where the minute hand and the hour hand are driven and the case where only the hour hand is driven. It is possible to provide an automatic correction timepiece that can be adjusted in a short time while being driven by a clock.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, specific examples according to the present invention will be described.
This will be described with reference to the drawings.

FIGS. 1 and 2 are plan views showing a wheel train of an automatic correction timepiece according to a first embodiment of the present invention.

The wheel train of the self-correcting timepiece of this embodiment has a fifth pinion 2 as a first sun gear meshed with a rotor pinion 1 of a motor capable of rotating forward and reverse, and a third pinion as a first planetary gear with a fifth wheel 2. The first intermediate wheel 4 and the second intermediate wheel 5 are arranged on the orbit of the third wheel 3 so that the third wheel 3 is selectively engaged with the third wheel 3.

The gear portion of the second sun gear 6 meshes with the first intermediate wheel 4, and the gear portion of the Hino reverse wheel 7, which is the second planetary gear, meshes with the pinion 6a of the second sun gear. An hour wheel 8 and a minute wheel 9 are provided coaxially on the orbit of the reverse wheel 7, and the hour wheel 8 meshes with the second intermediate wheel 5.

A guide path 10 comprising an arc-shaped groove is provided on a circle centered on the rotation axis of the fifth wheel & pinion 2 as a first sun gear,
The rotation shaft of the third wheel & pinion 3, which is the first planetary gear, is movable in the guide path 10. Similarly, a guide path 11 composed of an arc-shaped groove is provided on a circle centered on the rotation axis of the second sun gear 6, and the rotation path of the Hino minute wheel 7 as a second planetary gear is formed on the guide path 11. It is movable. These guideways 10, 1
1 is formed, for example, on a base plate not shown.

A ring member 12 is coaxially supported by the second planetary wheel 7 which is a second planetary gear, and the coil spring 13 attached to the ring member 12 causes the second wheel 7 to become an hour hand wheel 8 and a minute hand wheel. 9 is biased to be isolated from.

At normal time and at the time of minute hand correction, the rotor pinion 1 is rotated clockwise. When the rotor pinion 1 rotates clockwise, the fifth wheel & pinion 2 rotates counterclockwise. When the fifth wheel & pinion 2 rotates counterclockwise, the third wheel & pinion 3 revolves clockwise around the fifth wheel & pinion 2 along the guideway 10 in a counterclockwise direction.

When the third wheel 3 reaches the left end of the guideway 10 in the figure, the revolution is prevented and the first intermediate wheel 4 is engaged. When the third wheel & pinion 3 meshes with the first intermediate wheel 4, the first intermediate wheel 4 rotates counterclockwise by the rotation of the third wheel & pinion 3.

When the first intermediate wheel 4 rotates counterclockwise,
The second sun gear 6 rotates clockwise. Second sun gear 6
Rotates clockwise, the Hino minute wheel 7 meshed with the pinion 6a of the second sun gear rotates counterclockwise while the guideway 1
1 and revolves around the second sun gear 6 in the clockwise direction against the urging force of the coil spring 13.

When the Hino minute wheel 7 reaches the right end of the guideway 11 in the drawing, the revolution is prevented, and the gear portion of the Hino minute wheel 7 has a pinion pinion 9a and a Hino minute wheel 7a. Respectively mesh with the hour wheel 8. The hour wheel 8 and the minute wheel 9 are driven by the minute wheel 7 in an interlocked manner at a speed ratio of 1:12.

The second intermediate wheel 5 meshing with the hour wheel 8 is driven in the counterclockwise direction by the hour wheel 8, but idles without transmitting any other rotation.

When correcting the hour hand, the rotor pinion 1 is rotated counterclockwise. When the rotor pinion 1 rotates counterclockwise, the fifth wheel & pinion 2 rotates clockwise. When the fifth wheel 2 rotates clockwise, the third wheel 3 rotates counterclockwise,
The vehicle revolves clockwise around the fifth wheel 2 along the guideway 10.

When the third wheel 3 reaches the right end of the guideway 10 in the drawing, the revolution is prevented and the pinion 3a of the third wheel meshes with the second intermediate wheel 5. When the third wheel & pinion 3 meshes with the second intermediate wheel 5, the second intermediate wheel 5 rotates clockwise by the rotation of the third wheel & pinion 3. When the second intermediate wheel 5 rotates clockwise,
The hour wheel 8 rotates counterclockwise.

At this time, the first intermediate wheel 4 and the second sun gear 6
Since the rotation of the motor is no longer transmitted to the minute wheel 7, the minute wheel 7 is separated from the hour hand 8 and the minute hand 9 by the urging force of the coil spring 13. As a result, the hour wheel 8 and the minute wheel 9 can rotate independently, so that only the hour wheel 8 can be rotated.

On the upper surface of the minute hand wheel 9 and the lower surface of the hour hand wheel 8, reflection plates 14 and 15 for position detection are provided, respectively. Further, a position detection sensor (not shown) is provided on the top plate and the base plate. Light-emitting element (light-emitting diode) and light-receiving element (photodiode)
The minute hand and the hour hand are respectively set to point to the position "12" on the dial when the reflectors 14, 15 come to positions facing these position detecting sensors.

Thus, when the light emitted from the light emitting element of the position detecting sensor is reflected by the reflectors 14 and 15 and detected by the light receiving element, the minute hand and the hour hand are at the position of "12" on the dial. I understand.

Normally, the rotor is rotated one step clockwise at intervals of 10 seconds. The minute hand makes one revolution in one hour, and the hour hand makes one revolution in 12 hours.

At the time of correction, the rotor is first rotated clockwise at high speed, and the minute hand is returned to zero. Next, the rotor is rotated at a high speed in a counterclockwise direction to return the hour hand to zero.

Further, the minute hand is adjusted to the current time by rotating the rotor clockwise again at a high speed. Finally, the rotor is rotated counterclockwise at a high speed to set the hour hand to the current time.

In the embodiment described above, the guideways 10, 1
Although 1 has been described as being formed on the main plate, it can be formed on any other member without being limited to the main plate. An appropriate method can be selected, such as forming a tooth portion that meshes with the rack on the shaft or narrowing the center of the guide path to improve the seating of the rotating shaft.

FIGS. 3 and 4 are plan views showing the wheel train of the self-correcting timepiece according to the second embodiment of the present invention.

The wheel train of the self-correcting timepiece according to this embodiment is configured such that the rotation shaft of the fifth wheel & pinion 2 which is the first sun gear and the rotation shaft of the third wheel & pinion 3 which is the first planetary gear are connected to each other. 5th car 2 while rotating
The arm 16 which supports so that the circumference | surroundings of this can revolve is provided. Similarly, the rotation shaft of the second sun gear 6 is connected to the rotation shaft of the Hino minute wheel 7 as a second planetary gear so that the Hino minute wheel 7 can revolve around the second sun gear 6 while rotating. A supporting arm 17 is provided.

A coil spring 13 is attached to an end of the arm 17 connecting the second sun gear 6 and the minute wheel 7 on the side of the minute wheel 7, whereby the minute wheel 7 becomes an hour wheel 8. Further, an urging force is applied so as to be separated from the minute hand wheel 9.

For other basic configurations,
The description is omitted because it is the same as the first specific example.

According to these specific examples, it is possible to change the rotation direction of the rotor without using a complicated clutch device or the like,
It is possible to switch between the case where the minute hand and the hour hand are driven and the case where only the hour hand is driven, so that the time can be corrected in a short time.

[0037]

As described above, the invention described in the first claim of the present application is an automatic correction timepiece in which the hour hand and the minute hand are driven by one motor. A first sun gear that is rotationally driven, a first planetary gear that always meshes with the first sun gear, and a first planetary gear that is arranged on the orbit of the first planetary gear and that is selectively meshed by the revolution of the first planetary gear. A first intermediate wheel and a second intermediate wheel, a second sun gear that always meshes with the first intermediate wheel, a second planetary gear that always meshes with the second sun gear, and are arranged on the orbit of the second planetary gear, And an hour wheel that always meshes with the second intermediate wheel, and a minute wheel provided coaxially with the hour wheel, and the second planetary gear is biased so as to be isolated from the hour wheel and the minute wheel. Revolves against this urging force to engage the hour and minute hands. It is a configuration automatic timepiece of that.

In the present invention, when the first planetary gear revolves around the first sun gear and rotates the rotor in such a direction as to mesh with the first intermediate wheel, the rotation of the rotor is changed to the first sun gear and the first sun gear. The planetary gear, the first intermediate wheel, the second sun gear, and the second planetary gear are sequentially transmitted. The second planetary gear revolves around the second sun gear, meshes with the hour and minute hands against the urging force, and drives the hour and minute hands. The second intermediate wheel that meshes with the hour wheel idles.

Conversely, when the first planetary gear revolves around the first sun gear and rotates the rotor in such a direction as to mesh with the second intermediate wheel, the rotation of the rotor is changed to the first sun gear and the first planetary gear. The gear and the second intermediate wheel are sequentially transmitted, and the second intermediate wheel drives only the hour hand. First intermediate wheel, second sun gear and second
Since the rotation of the rotor is not transmitted to the planetary gear, the second planetary gear is separated from the hour and minute hands by the biasing force.

Therefore, according to the present invention, by changing the rotation direction of the rotor, it is possible to switch between the case where the minute hand and the hour hand are driven and the case where only the hour hand is driven. It is possible to provide an automatic correction timepiece that can be adjusted in a short time while being driven by a clock.

[Brief description of the drawings]

FIG. 1 is a plan view showing a wheel train of an automatic correction timepiece according to a specific example of the present invention.

FIG. 2 is a plan view showing a wheel train of an automatic correction timepiece according to a specific example of the present invention.

FIG. 3 is a plan view showing a wheel train of an automatic correction timepiece according to another embodiment of the present invention.

FIG. 4 is a plan view showing a wheel train of an automatic correction timepiece according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Motor (rotor pinion) 2 1st sun gear (5th wheel) 3 1st planetary gear (3rd wheel) 3a Pinion of 1st planetary gear (3rd wheel) 4 1st intermediate wheel 5 2nd intermediate wheel 6 2nd Sun gear 6a Kana of the second sun gear 7 Second planetary gear (Hino minute wheel) 7a Kana of the second planetary gear (Hino minute wheel) 8 Hour hand 9-minute hand wheel 9a Kana of the minute hand wheel 10 Guideway 11 Guideway Reference Signs List 12 ring member 13 coil spring 14 reflector 15 reflector 16 arm 17 arm

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Claims (1)

[Claims] 1. An automatic correction timepiece that drives an hour hand and a minute hand with a single motor, a motor capable of rotating forward and reverse, a first sun gear driven to rotate by the motor, and always meshed with the first sun gear. A first planetary gear, a first intermediate wheel and a second intermediate wheel, which are arranged on the orbit of the first planetary gear and are selectively meshed by the revolution of the first planetary gear; A second sun gear, a second planetary gear that always meshes with the second sun gear, an hour wheel that is arranged on the orbit of the second planetary gear and that always meshes with the second intermediate wheel, and that is coaxial with the hour wheel. The second planetary gear is provided with an urging force so as to be separated from the hour hand wheel and the minute hand wheel, and revolves against this urging force, so that the second planetary gear wheel and the minute hand wheel An automatic correction watch characterized by meshing with.