JPH01240891A - World timepiece - Google Patents

Abstract

PURPOSE:To achieve a lower cost eliminating the need for providing a timepiece mechanical body for each time display section, by a method wherein a minute hand wheel of a plurality of time display sections is turned with the rotation of a sole time mechanical body to turn an hour hand wheel through a reduction wheel from the minute hand wheel. CONSTITUTION:A front plate 2 and a rear plate 3 are held at a specified interval through a middle plate 4 and a plurality of display sections 1 having a minute hand wheel 9, an hour hand wheel 7 and a reduction wheel 8 are arranged therebetween. The rotation of a sole hour hand mechanical body 12 is transmitted to the minute hand wheel 6 at the plurality of display sections 1 through a drive sprocket 11a, a belt 11b and a driven sprocket 11c as power transmission means. The rotation of the minute hand wheel 6 is transmitted to the hour hand wheel 7 through the reduction wheel 8.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a world clock that simultaneously displays time in various parts of the world.

[Prior Art] A typical world clock has time display sections each driven by a clock body arranged near representative cities on a world map.

Each watch body has its own independent drive mechanism.

[Problems to be solved] World clocks with this conventional configuration require multiple independent clock bodies, which causes high costs, and if any of the clock bodies starts or lags, There is a problem with reliability as the correct time difference between cities is no longer displayed.

An object of the present invention is to provide a low-cost and highly reliable world clock.

[Means to solve the problem] In order to achieve the above object, a world clock of the present invention.

A plurality of time display sections including hour and minute hands are arranged on the display board, and each of these time display sections is equipped with a deceleration wheel from the minute hand wheel to the hour hand wheel. A clock mechanical body is disposed at a position apart from each time display section, and a power transmission means is disposed so that the driving force of this clock mechanical body drives each minute wheel of the plurality of time display sections. be.

[Function] The present invention rotates the minute wheels of a plurality of time display sections by the rotation of a single timepiece mechanical body through a power transmission means, and rotates the hour wheels from this minute wheel via a reduction wheel, so that each The hour and minute hands in the time display section display the time in one summer city.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, a plurality of time display sections 1a are arranged at predetermined intervals on the upper part of a display board 1 on which a world map is displayed on the entire front surface. Each time display section 1a has a circular dial printed thereon, and directly below each dial the names of major cities around the world, such as LONDON and TOKYO, are displayed in European letters.

As shown in FIG. 2, the back side of the display board 1 is fixed in contact with the front surface of the front board 2, and the central position of each time display section 1a is provided with a through hole through which the pointer vibrator 10a passes. is the provision. A rear plate 3 is positioned behind the front plate 2 at a predetermined interval, and between the two plates, an intermediate plate 4 whose distance from both plates is maintained by holding columns 4a, 4a is fixed with screws 5.

A minute wheel 6, an hour wheel 7, and a reduction wheel 8 are located between the front plate 2 and the middle plate 4. In other words, the driven shaft 6a which is the minute hand shaft
A minute hand wheel 6 is pivotally supported at the front end of the minute hand wheel 6 via a bush 6b, and an hour hand wheel 7 is fitted into a pipe portion of the minute hand wheel 6 and is rotatably supported.

The reduction gear 8 is rotatably supported on a shaft portion 4b integrally projecting from the intermediate plate 4. The minute hand wheel 6 and the hour hand wheel 7 each have their pipe portions protruding from the front of the time display section 1a.
A minute hand 9 and an hour hand 10 are attached to the tip of each pipe portion.

Further, a driven sprocket Ilc constituting a power transmission means to be described later is pivotally supported in a portion between the rear plate 3 and the middle plate 4 of the driven shaft 6a.

A watch mechanical body 12 is attached to the back of the rear plate 3 facing the lower central portion of the display plate 1. This clock mechanical body 1
2 is equipped with a mechanism for driving the ordinary second hand, two minute hands, and one hour hand. Of these, the minute hand shaft is the drive shaft 13 of the world clock of the present invention, and the minute hand shaft is the drive shaft 13 of the world clock of the present invention. It sticks out to the front. A drive sprocket lla constituting a power transmission means is pivotally supported on the protrusion of the drive shaft 13.

A belt llb is wound around the driving sprocket lla and the driven sprocket 11C, and the belts llb are connected to each other so that they can rotate synchronously.

As shown in a reduced scale of the power transmission means in FIG. 3, the driven sprockets 11C are arranged horizontally upward, and the driving sprocket lla is located in the lower center, and each of these sprockets is connected to one belt 11b. are connected by.

Between each driven sprocket 1lcO is the idle car lid.
... is provided, and the winding length of belt llb is increased to ensure power transmission.

The means for attaching the watch mechanism body 12 to the rear plate 3 is to provide a hole 3b in the rear plate 3 for vertically long attachment, and to screw the screw 14 through the hole 3b to the watch mechanism body 12. . By moving the screw 14 up and down within the hole 3b, the position of the timepiece mechanical body 12, that is, the drive shaft 13, can be moved slightly in the up and down direction. After the belt 11b is wound around each sprocket and the idle wheel, the watch mechanical body 12 is removed and pushed down along the tag 3b to give the belt 11b an appropriate tension.
The watch mechanical body 12 is firmly fixed to the rear plate 3 with screws 14.

The minute hand and hour hand in each time display section 1a are attached to the minute hand vibrator and hour hand pipe after the power transmission means 11a to lid and the watch mechanical body 12 are assembled, with a time difference in weight of each part. be.

As another embodiment of the power transmission means, as shown in FIG.
1a to each driven sprocket 21e by a separate belt 21b, 21c, 21d.

21f and 21g, or as shown in FIG. 5, power is transmitted from the driving sprocket 3ja driven by the watch mechanical body 30 to a specific driven sprocket 31c by means of a belt 31b. The power may be further transmitted to other driven sprockets 31d and 31e by separate belts 31f and 31g. In these cases, the drive sprocket 21
a and the driven sprocket 31c have a plurality of overlapping sprockets in the axial direction.

Note that instead of the belt, a chain, rope, or the like may be used to transmit the rotational force.

[Effects] As explained above, the financial world timepiece of the present invention transmits power from one timepiece mechanical body through a power transmission means. Since the power is transmitted to the U number of time display parts, there is no need to provide a clock mechanism for each time display part, which contributes to cost reduction and eliminates errors between each time display part. , it has remarkable effects such as improved reliability.

[Brief explanation of the drawing]

Fig. 1 is a front view, Fig. 2 is an enlarged sectional view illustrating the main parts, Fig. 3 is a front view showing the arrangement of the power transmission means, and Fig. 4 is a front view.
, 5 are schematic diagrams showing the arrangement of the power transmission means in other embodiments. 1... Display board, 1a... Time display section, 6...
・Minute wheel, 7...Hour hand wheel, 8...Deceleration wheel, 9...Minute hand, 10...Hour hand, 11a~llc
, 21a-21g. 31a to 31g...Power transmission means, 12.20.30...Clock mechanical body. that's all

Claims (1)

[Scope of Claims] A plurality of time display sections with hour and minute hands are disposed on the display board, and each of the time display sections is equipped with a deceleration wheel that changes the speed from the minute wheel to the hour wheel. A timepiece mechanism is disposed at a position remote from the time display section, and a power transmission means is disposed for driving each minute wheel of the plurality of time display sections by the driving force of the timepiece mechanism. Features a world clock.