JPS6326357B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a clock, particularly a tower clock installed outdoors.
Concerning large clocks such as flower clocks, etc. In particular, the present invention relates to a large watch that is equipped with a long hand, or minute hand, and a short hand, or hour hand, and is driven by the long hand.

An example of the structure of a conventional large clock is shown in Figures 1 and 2.
As shown in the figure. In the figure, 1 is a long hand, 2 is a short hand,
3 indicates a dial 3 that displays the time. The long hand 1 and the short hand 2 are fixed to each end of rotating shafts 4 and 5 which are arranged coaxially and freely rotatable, and are connected to each other via a gear mechanism 6 provided on each rotating shaft 4 and 5. , and is driven by a drive motor 7. That is, there is a gear 8 on the rotating shaft 5 of the hour hand 2.
However, gears 9 are attached to the rotating shaft 4 of the long hand 1 passing through the rotating shaft 5, and these gears 8 and 9
are meshed with respective gears 11 and 12 which are integrally mounted on separate rotating shafts 10, respectively. Gear 8 and Gear 1
1 is formed so that the ratio of the rotational speeds is 1:4, and the gear 9 and the gear 12 are formed so that the ratio of the rotational speeds is 3:1. Note that 16 is a guide for the rotating shaft 5. In this configuration, the rotational force of the drive motor 7 is transmitted to the rotating shaft 4 of the long hand 1 via the worm gear mechanism 13, and the gear 9-12
It is transmitted to the rotating shaft 5 of the hour hand 2 via the rotating shaft 10, the gear 11, and the gear 8, thereby rotating the long hand 1 and the short hand 2 at a rotation speed ratio of 1:1/12.
Further, in this case, weights 14 and 15 are provided at the rear ends of the long hand 1 and the short hand 2 so that the long hand 1 and the short hand 2 can be stopped in a well-balanced manner at predetermined rotational positions depending on the time.

In this manner, in the conventional large watch, the rotational force of the drive motor 7 is transmitted to the respective rotating shafts 4 and 5 via the gear mechanism 6 including the worm gear mechanism 13,
It drives the long hand 1 and the short hand 2, and a weight 14 for balance is attached to the rear end of the long hand 1 and the short hand 2.
15, there is a limit to the length of the long hand 1, and therefore, even though it is a large watch, there is a limit to its size. Furthermore, it was structurally complex. As mentioned above, in conventional large watches, the drive motor directly drives the rotating shaft that rotates the long and short hands.
In particular, a powerful motor is required to drive the long hand, and since both the long and short hands are equipped with balance weights, a powerful motor is required.

The present invention solves the above-mentioned problems and provides a new timepiece that has a simple structure and can be configured as a large timepiece of any size.

In the present invention, the long hand and the short hand are interlocked with each other via a rotating shaft, and the long hand has an annular guide plate that guides the long hand. Then, a driving source is placed on the long hand,
The minute hand is directly driven by this drive source. According to this invention, since the long hand is supported at two points by the rotating shaft and the guide plate, the long hand can be formed to have any length. Furthermore, since the long hand is directly driven, the driving force is smaller than that of the conventional method, and the structure is also simplified. Therefore, large tower clocks, flower clocks, etc. can be easily constructed.

Next, an example of a timepiece according to the present invention will be explained in detail using FIG. 3 and subsequent figures.

In this example, as shown in FIGS. 3 and 4, a long hand 21 and a short hand 22 are provided, the short hand 22 is fixed to the first rotating shaft 24, and the long hand 21 is passed through the first rotating shaft 24. and is fixed to the second rotating shaft 23 which rotates coaxially. Both rotating shafts 23 and 24 are connected to each other via a gear mechanism 31. That is, a gear 25 is mounted on the first rotating shaft 24, a gear 26 is mounted on the second rotating shaft 23, and both gears 2
5 and 26 are meshed with respective gears 29 and 30 on a third rotating shaft 28 disposed on a support 27, respectively.
The gear 25 and the gear 29 are formed so that the ratio of their rotational speeds is 1:4, and the gear 26 and the gear 30 are formed so that their rotational speed ratio is 3:1. In addition, the long hand 21
An annular guide plate 32 is arranged on the outer periphery of the short hand 22. In this example, the guide plate 32 is formed at a position where the tip of the long hand 21 is guided. On the other hand, a driving source for directly driving the long hand 21, in this case, for example, a driving motor 33, is fixed on the tip of the long hand 21. Then, a driving wheel 34 is integrally attached to the shaft of this motor 33, and this driving wheel 34 is attached to the long hand 21.
The guide plate 32 is inserted through the opening 35 provided at the tip.
It makes contact with the surface 32a of . That is, the driving wheel 34 is configured to rotate and move on the guide plate 32 by the motor 33, so that the minute hand 21 is directly driven. For details on how the driving wheel 34 is driven by the motor 33 with an opening 35 provided at the tip of the long hand 21, please refer to the accompanying drawings FIG. 7 and its sectional view FIG. 8. This guide plate 32 can also serve as a dial indicating the time, if necessary. In addition, the driving wheel 34
The guide plate 32 may be subjected to appropriate treatment to prevent slipping, for example, the surface of the driving wheel 34 may be provided with a non-slip surface.

A control circuit 36 is disposed on the minute hand 21 to drive and stop the motor 33 in accordance with the time. The control circuit 36 includes, for example, a pulse generator 41 that generates a pulse once per minute, as shown in FIG. A stop switch means 44 consisting of a micro switch or a reed relay is provided to stop the motor 33. According to this control circuit 36, the motor starting relay circuit 42 is activated by the pulse from the pulse generator 41, and then the holding circuit 43 is activated to drive the motor 33, and the long hand 21 corresponds to one minute. Stop switch means 4 after moving the distance
4 operates to release the holding circuit 43 and the motor 33
will be stopped. As the stop switch means 44,
In the case of this example, 60 small magnets 45 are arranged at equal angular intervals over the entire circumference on the surface 32a of the guide plate 32, and a reed switch 46 is placed on the back side of the long hand 21 so as to correspond to the small magnets 45. Establish and configure. Or, instead of a small magnet, a reflector or projection (or recess)
It is also possible to use infrared rays for the reflecting plate and use a micro switch or the like for the projections (or recesses). Moreover, this control circuit 36 is normally
Although it is connected to an AC power source, it can also be activated by supplying pulses directly from the master clock if necessary. The control circuit 36 is energized or pulsed through a lead wire 47 inserted through the rotating shaft 23 of the minute hand 21. One end of each lead wire 47 is connected to a slip ring 48 attached to the lower end of the rotating shaft 23. The slip ring 48 has in this case four ring conductors 49a, 49b, 49c and 49d, each ring conductor 49a to 49c having a contact piece 50a, 50b,
50c and 50d, respectively. Contact piece 50
An AC power supply terminal t ₁ is led out from a and 50b, and a pulse input terminal t ₂ from the master clock is led out from contact pieces 50c and 50d.

In addition, in order to follow the guide plate 32 well wherever the watch is installed, the long hand 21 is divided into two parts at the middle part as shown in FIG. Both divided members 21A and 21B are connected to each other.

Next, the operation of this configuration will be explained. When the motor 33 on the minute hand 21 is driven by the control circuit 36, the driving wheels 34 are driven in rotation on the guide plate 32 accordingly. As a result, the long hand 21 itself rotates and moves along the guide plate 32 together with the rotating shaft 23. As the long hand 21 rotates, its rotational force is transmitted to the rotating shaft 23 - gear 26 - gear 30 - rotating shaft 28 - gear 29 - gear 25 - rotating shaft 24, and the short hand 22 rotates. And long hand 21
When it moves a distance corresponding to one minute and comes to a position corresponding to the small magnet 45, the reed relay 46 is activated and the motor 33 is stopped. This operation is repeated every minute, and each revolution of the long hand 21 causes the short hand 22 to rotate 1/12, and the time is displayed.

In addition to the motor 33 described above, the driving source may be, for example, compressed air, hydraulic pressure, magnetism, wind power, or the like.

Further, in the above example, the guide plate 32 is provided at the tip of the long hand 21, but it is also possible to arrange the guide plate 32 so as to correspond to an intermediate position of the long hand 21.

According to the above-described configuration, the long hand 21 is connected to the rotating shaft 23.
Since the long hand 21 is supported by the two points of the guide plate 32 and the guide plate 32, the long hand 21 can be formed to have an arbitrary length. Furthermore, since the long hand 21 is directly driven by the driving motor 3 disposed on the long hand 21, the long hand 21 can be rotated smoothly. Further, the driving force is small and the structure is extremely simplified compared to the conventional one.

In addition, when the long hand 21 is divided into two parts and movably connected at the middle part, for example, when a flower clock is installed in a terraced flower bed, the long hand 21 can be moved along the terrace. This increases the degree of freedom in clock design. As described above, the present invention allows large-sized clocks to be easily produced, making it suitable for application to various clocks such as tower clocks and flower clocks.

[Brief explanation of the drawing]

1 and 2 are a plan view and a side view thereof showing a conventional timepiece, FIGS. 3 and 4 are a plan view and a partially sectional side view thereof showing an example of the timepiece of the present invention, and FIG. The figure is a perspective view of a long hand showing another example of the present invention, and FIG. 6 is a control circuit diagram for explaining the present invention. FIG. 7 is a plan view of the tip of the long needle, and FIG. 8 is a sectional view of FIG. 7. 21 is a long hand, 22 is a short hand, 23 and 24 are rotating shafts, 31 is a gear mechanism, 32 is a guide plate, 33 is a motor, and 34 is a driving wheel.

Claims (1)

[Claims] 1. In a large clock whose two hands, a long hand and a short hand, display the predetermined time according to a gear train mechanism via a joint rotating shaft installed at the lower center of the time display panel, 60 hands are arranged at equal intervals around the outer circumference of the display panel. an annular guide in which a magnet is arranged; an electric motor controlled by an electric circuit including a crystal oscillator that generates a pulse signal every minute is installed on the tip of the long hand; the guide is driven by the electric motor; A driving wheel that moves forward in contact with a surface is installed with a part of the tip of the long hand opened, and a reed switch is installed on the back side of the tip of the long hand so that the motor moves in response to the magnet on the guide. The minute hand stops after traveling on the guide via the driving wheel for a distance corresponding to one minute, and then moves again according to the pulse signal to display a predetermined time. A large clock driven by a minute hand.