JPH0563750B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a clock drive unit, and particularly to a clock drive unit that displays seconds, a 12-hour time display, a 24-hour date, a world clock display, etc. at separate positions. This invention relates to a clock drive unit suitable for

[Prior Art] Clocks with multiple displays like this have been known for a long time, in which a second hand shaft, a minute hand shaft, an hour hand shaft, a 24-hour hand shaft, etc. are provided coaxially, and the pointers provided on these shafts are Concentric ring-shaped minute scale around 12
Various display scales such as a time scale and a 24-hour scale are arranged.

[Problem to be Solved] When a large number of display scales are arranged in a concentric ring shape as described above, not only the display space for each scale is limited, but also the display has to be matched with a large number of points, making the display difficult to see.

Therefore, it is conceivable to separate each display so that the display is easier to read, but if you try to configure the clock train by expanding the clock train to drive each display at a separate location, the configuration will be complicated. There are problems such as:

An object of the present invention is to provide a timepiece drive unit that has a simple configuration and allows various displays to be placed at arbitrary positions apart from the basic timepiece mechanism.

[Means for Solving the Problems] In order to achieve the above object, a timepiece drive unit of the present invention includes a timepiece wheel train having a first slip mechanism, a second hand shaft for driving a second hand, and a first minute hand shaft. and a basic timepiece mechanical body in which the first hour hand shaft protrudes coaxially from the mechanical body case.

At a position a predetermined distance away from the first minute hand axis,
A second minute hand shaft is driven by a minute pulley provided on the first minute hand shaft via a belt and drives the minute hand, and a second minute hand shaft is coaxially fitted with the second minute hand shaft and is connected to the second minute hand shaft. It is provided with a second hour hand shaft that is interlocked with the wheel and drives the hour hand.

The watch mechanism also includes a first 24-hour wheel provided coaxially on the outer periphery of the first hour hand shaft, and a first 24-hour wheel located a predetermined distance away from the first 24-hour wheel.
The second 24-hour wheel is driven by a belt from the second 24-hour wheel and drives a 24-hour display.

Support plates that rotatably support the second minute hand shaft, second date wheel, second hour hand shaft, and second 24-hour wheel are connected to the basic timepiece mechanical body.

Furthermore, in the above-mentioned clock drive unit, the second
A third 24-hour wheel is provided that meshes with the 24-hour wheel and is equipped with a 24-hour display board.
A second slip mechanism is provided on the 24-hour wheel.

[Example] An example of the present invention will be described below based on the drawings.

As shown in Figures 1 and 2, the basic watch mechanical body 1
includes a timepiece wheel train 3 having a first slip mechanism 2 supported by mechanical body cases 10a, 10b, and a second hand shaft 4 and a first minute hand shaft 5 that are rotationally driven by this timepiece train wheel 3. and first hour hand axis 6
is coaxially forward from the mechanical case 10a (the first
(upper part of the figure). A second hand 7 is attached to the tip of the second hand shaft 4. The first hour hand shaft 6 is attached to the first date wheel 8 that meshes with the pinion 5a of the first minute hand shaft 5.
In addition to the pinion 8a that decelerates and transmits rotation to the
A pinion 8b is provided for decelerating and transmitting rotation to the 24-hour wheel 9. This first 24-hour wheel 9 is provided coaxially on the outer periphery of the first hour hand shaft 6.

A minute pulley 11 is fixed to the tip of the first minute hand shaft 5, and a minute pulley 11 is also integrally attached to the second minute hand shaft 12 located a predetermined distance away from the minute hand shaft 5.
2a, and a belt 13 is looped around between the two pulleys 11 and 12a. A minute hand 14 is attached to the tip of the second minute hand shaft 12. A second hour hand shaft 15 is fitted coaxially with the second minute hand shaft 12, and the rotation of the second minute hand shaft 12 is controlled from the second date wheel 16 through the second hour hand wheel 15a. is decelerated and transmitted to the second hour hand shaft 15. Second hour hand axis 1
An hour hand 17 is connected to the tip of the numeral 5.

A support plate 20a is connected to the mechanical case 10a of the watch mechanism 1, and the second minute hand shaft 12, the second minute hand shaft 12, A second day wheel 16 and a second hour hand shaft 15 are rotatably supported.

A 24-hour pulley 21 is fixed to the first 24-hour wheel 9, and a 24-hour pulley 21 is also integrally attached to the second 24-hour wheel 22 located a predetermined distance away from the 24-hour wheel 9.
A is provided, and a belt 23 is looped around between both 24 o'clock pulleys 21 and 22a. A third 24-hour wheel 24 meshes with the second 24-hour wheel 22. Third
A 24-hour display board 25 is attached to the 24-hour wheel 24, and a second slip mechanism 26 is provided to the third 24-hour wheel 24.

The second slip mechanism 26 will be explained as follows.
The 24-hour axle 27 is a stepped shaft, and a third 24-hour wheel 24 is fitted into the small diameter portion, and a slip spring 28 is installed between the 24-hour wheel 24 and the large diameter portion located above it.
There is an adjustment seat 29 at the bottom of the 24 hour wheel 24.
is press-fitted. By adjusting the position of this adjustment seat 29 up and down, the slip torque can be adjusted. Second 24-hour car 22 and third 24-hour car 24
is rotatably supported by a support plate 20a and a support plate 20c connected to the support plate 20a.

Reference numeral 18 is a hand turning knob for rotating the first minute hand shaft 5 to correct the time, and reference numeral 19 is a hand turning knob for rotating the 24-hour axle 27 to correct the position of the display plate 25.

FIG. 3 is a front view of a timepiece embodying the present invention, with a second display section 31 at the lower center of the front of the outer case 30 of the timepiece, and a 12-hour time display section 32 at the upper left.
A 24-hour world clock display section 33 is placed in the upper right corner. The second hand 7 mentioned above is located at the center of the seconds display section 31.
is located behind it, and a second scale 31a is provided in a ring shape concentric with the center of rotation of the second hand 7. The above-mentioned minute hand 14 and hour hand 17 are located at the center of the time display section 32, and a minute scale 32a and a 12-hour hour numeral 32b are arranged in a ring shape concentric with the center of rotation of both hands behind them.
is provided. In addition, the world clock display section 33 has a central disc that is the above-mentioned 24-hour display board 25,
On the front, a world map, the names of major cities around the world, and a time difference scale corresponding to each city are displayed. On the outside of this display plate 25, hour numerals 33a for 24 hours and hour scales 33b for 30 minute intervals are provided in a concentric ring shape.

With such a structure, when the basic timepiece mechanical body 1 is driven, the second hand shaft 4 rotates and the second hand 7 rotates in the second display section 31 to display seconds.

At the same time, the basic watch mechanical body 1 is driven to
The minute hand shaft 5 rotates, and this rotation causes the minute pulley 11,
The second minute hand shaft 12 is rotated via the belt 13 and the minute pulley 12a, and the minute hand 14 is rotated in the time display section 32 to display the minute. The rotation of the second minute hand shaft 12 rotates the second hour hand shaft 15 via the second date wheel 16, and the hour hand 17 is rotated in the time display section 32 to display the hour.

At the same time, the first 24-hour wheel 9 rotates through the first minute hand shaft 5 and the first date wheel 8 due to the drive of the basic watch mechanical body 1, and this rotation causes the 24-hour pulley 2 to rotate.
1. Belt 23, 2nd belt via pulley 22a
The 24 hour wheel 22 rotates. Furthermore, this rotation is the third
The clock signal is transmitted to the 24-hour wheel 24 of the world clock 24, and the 24-hour display plate 25 is rotated by the world clock display section 33 via the slip mechanism 26. Hour digit 33 corresponding to city location
a. By reading the hour scale 33b, the current time in major cities around the world can be determined.

If the basic timepiece mechanism 1 is set to, for example, the current time in Tokyo, the operation to adjust the Tokyo time difference scale on the display board 25 to the current time on the hour scale 33b is performed using the hand turn knob 19. It is carried out with A slip mechanism 26 is provided so that no extra load is applied to the timepiece mechanical body 1 at this time.

Note that the 24-hour display section 33 is not limited to displaying a world clock, but may also display the date, day of the week, and the like.

[Effects] As explained above, the watch drive unit of the present invention is a belt-type drive unit, and has an extremely simple structure that allows it to display the current time at any position away from the basic watch mechanism. , it is possible to place a 24-hour display, etc. In addition, in the 24-hour display, the display board can be safely and easily corrected by the second slip mechanism.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a partially cutaway sectional view of the main part, FIG. 2 is a partially sectional front view of the same, and FIG. 3 is a reduced front view of a timepiece implementing the present invention. It is a diagram. DESCRIPTION OF SYMBOLS 1... Watch mechanical body, 2... First slip mechanism, 3... Watch gear train, 4... Second hand shaft, 5... First
minute hand axis, 6...first hour hand axis, 7...second hand axis, 9
...First 24-hour wheel, 10a, 10b... Mechanical case, 11... Minute pulley, 12... Second minute hand shaft, 13... Belt, 14... Minute hand, 15... Second hour hand Axis, 16... Second day's back wheel, 17...
Hour hand, 20a, 20b, 20c...Support plate, 22
...Second 24-hour wheel, 23...Belt, 24...Third 24-hour wheel, 25...24-hour display board, 26...
Second slip mechanism.

Claims (1)

[Claims] 1. A basic clock train including a timepiece train having a first slip mechanism, in which a second hand shaft for driving a second hand, a first minute hand shaft, and a first hour hand shaft protrude coaxially from a mechanical case. and a first minute hand that is located a predetermined distance from the first minute hand shaft and that is driven by a minute pulley provided on the first minute hand shaft via a belt and that drives the minute hand. a second hour hand shaft that is coaxially fitted with the second minute hand shaft and interlocks with the second minute hand shaft to drive the hour hand; A first 24-hour wheel is provided coaxially on the outer periphery of the shaft, and a 24-hour wheel is located at a predetermined distance from the first 24-hour wheel and is driven by a belt from the first 24-hour wheel. a second 24-hour wheel that drives a time display; the second 24-hour wheel is connected to the clock mechanical body, and includes the second minute hand axis, the second date wheel, the second hour hand axis, and the second hour hand axis; A clock drive unit consisting of a support plate that rotatably supports each of the two 24-hour wheels. 2. In claim 1, a third 24-hour wheel is provided which meshes with the second 24-hour wheel and to which the display plate is attached, and a second slip mechanism is provided on the third 24-hour wheel. A clock drive unit characterized by: