JP2615840B2 - Pointer-type world clock - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a pointer-type world clock.

[Prior art and its problems] Conventionally, as a pointer type world clock, a rotating bezel is rotatably provided around a dial, and a plurality of city names are displayed on the rotating bezel corresponding to a time difference. ing. To know the time of each city in such a pointer-type world clock, rotate the rotating bezel and match the city name corresponding to the time indicated by the hands on the extension of the clock to find the city you want to know. The time and minute hand corresponding to the name are used to read the time of each city in the world.

However, in such a pointer-type world clock as described above, when it is necessary to know the time of a desired city, the rotating bezel must always be rotated, and not only is the operability poor,
The time must be read at the time character position corresponding to each city name, and there is a problem that the time is difficult to read.

In addition to the pointer-type world clock as described above, there is also a world clock in which the hour hand is configured to be driven by another motor and only the hour hand is fast-forwarded by a switch operation by an amount equivalent to the time difference. In this case, two motors must be incorporated, and there is a problem that the motor becomes large.

[Purpose of the Invention] The present invention has been made in view of the above-described circumstances, and has as its object a simple configuration with good operability.
It is an object of the present invention to provide a pointer-type world clock whose time can be easily read.

[Summary of the Invention] In order to achieve the above object, the present invention provides a city display plate on which the names of cities in the world are printed according to the time difference on the periphery of the upper surface of the watch glass, and rotates the watch glass. Then, by specifying one of the city names displayed on the city display board, the rotation of the watch glass is transmitted to the Hino back trolley via the intermediate wheel, and the rotation of the Hino back trolley causes the rotation of the date. By rotating the hour wheel and rotating the hour wheel, the hour hand is moved according to the rotation angle of the watch glass.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 7.

FIGS. 1 and 2 show a pointer-type world clock of a travel watch type. In this world clock, a watch glass 2 is provided rotatably on the front of a watch case 1, a watch movement 3 described below is provided inside the watch case 1, and an alarm stop switch 4 is provided on the top of the watch case 1. I have. The watch glass 2 is made of a substantially disk-shaped glass plate, and the periphery of the watch glass 2 has the name of each city in the world (for example, LONODN, PA).
RIS, TOKYO, etc.) are provided on the circumference of the city at a position corresponding to the time difference, and a mounting structure and a rotation transmission mechanism will be described later. A dial 6 of the watch movement 3 is provided below the watch glass 2, and an hour hand is located between the dial 6 and the watch glass 2.
Hands such as 7a, minute hand 7b, second hand 7c, and alarm hand 7d are provided so as to be able to move. At the “12 o'clock” position of the watch case 1 on the outer periphery of the watch glass 2, a matching mark 8 for each city name is provided and in the vicinity thereof, ie, “12”.
A daylight saving time mark (DST) 9 is provided between the "hour" position and the "1 o'clock" position. That is, when the watch glass 2 is rotated to match the desired city name with the alignment mark 8, the hour hand 7a moves by the time difference as described later, and it becomes possible to know the time of the desired city. When the desired city name is adjusted to the daylight saving time mark 9 by rotating the dial 2, the hour hand 7a similarly moves and it becomes possible to know the time in daylight saving time of the desired city.

FIG. 3 shows a watch movement 3 incorporated in the watch case 1. This timepiece movement 3 drives a wheel train mechanism 11 by a stepping motor 10, moves an hour hand 7 a, a minute hand 7 b, and a second hand 7 c to indicate the time, displays a time by a time adjusting mechanism 12, and sets an alarm mechanism. The alarm time is set by the 13 alarm hands 7d, and only the hour hand 7a is moved by the time difference by the back and forth revolving mechanism 14 according to the rotation of the watch glass 2, and the day and night display mechanism 15 is used to set the time to morning (AM). The display in the afternoon (PM) is also switched. The watch case 1 includes a front case 1a and a rear case 1b.
Are arranged vertically, and the circuit board 18 is also arranged. Hereinafter, each member will be described in order.

The step motor 10 is a driving source of the clock movement 3,
When a predetermined pulse signal is given to the coil, a magnetic field is generated in the stator in accordance with the pulse signal, and the magnetic field causes the rotor 10a to rotate stepwise. In this case, the rotor 10a is rotatably provided between the rear case 1b and the train wheel bridge 16.

The wheel train mechanism 11 is driven by a step motor 10 to move a hand. The intermediate wheel 19 meshes with a pinion 10b of a rotor 10a of the step motor 10 and rotates.
The fourth wheel & pinion 20 which rotates by meshing with the 9th pinion 19a, the third wheel & pinion 21 which rotates by meshing with the fourth pinion & pinion 20a, and the minute hand wheel 22 which rotates by meshing with the third wheel & pinion 21a 21a When,
It consists of a minute wheel 23 that rotates in mesh with the first pinion 22a of the minute hand wheel 22, an hour wheel 24 that meshes with the pinion 23a of the minute wheel 23, and the like. The intermediate wheel 19, the fourth wheel 20, and the third wheel 21 are arranged between the
A minute hand wheel 22 is disposed between the intermediate receiver 16 and the intermediate receiver 17, and a minute wheel 23 and an hour hand wheel 24 are disposed between the intermediate receiver 17 and the front case 1a. In this case, the fourth wheel 20 rotated by the intermediate wheel 19 is integrally attached to the second hand shaft 20b,
The second hand shaft 20b has a cylindrical bearing portion 16a of the train wheel bridge 16 and a rear case 1b.
And the upper end of the front case 1a
The second hand 7c is attached to the protruding portion. The minute hand wheel 22 rotated by the third wheel & pinion 21 has a shaft portion 22c and a gear portion 22d attached by a leaf spring 22e so as to be able to slip and rotate.
The gear wheel 22d is provided concentrically with the second hand shaft 20b of the fourth wheel & pinion 20 while meshing with the second wheel & pinion 20, and is normally rotated by the third wheel & pinion 21, and this rotation is transmitted to the shaft portion 22c. When a load equal to or more than a certain value is applied, the shaft portion 22c and the gear portion 22d slip-rotate with each other. The shaft portion 22c is rotatably mounted between the outer periphery of the cylindrical bearing portion 16a of the wheel train bearing 16 and the cylindrical bearing portion 17a of the intermediate bearing 17, and a first pinion 22
a, a second pinion 22b is formed at a lower portion, and a pipe 22f for attaching a minute hand is integrally provided at an upper end, and an upper end of the pipe 22f is connected to a front case 1a.
And a minute hand 7b is attached to the protruding portion. A Hino wheel 23 that transmits the rotation of the minute hand wheel 22 to the hour wheel 24 is provided with a support shaft 25 of a Hino wheel truck 25 described below, which is rotatably provided on a cylindrical bearing portion 17a of the intermediate support 17.
a is rotatably attached to a, and usually a Hino back cart 25 is fixed, and the rotation of the minute hand wheel 22 is transmitted to the hour hand wheel 24. As described later, the timepiece glass 2 is rotated to set the time of a city in the world. If you know, Hino back cart with the minute hand wheel 22 fixed
25 rotates, and with this rotation, the first pinion 22a of the minute hand wheel 22
In this state, the minute wheel 23 revolves around and rotates the hour hand wheel 24. Further, the hour hand wheel 24 has a cylindrical pinion 24a, which is rotatably provided on the outer periphery of a pipe 22f of the minute hand wheel 22. The upper end of the cylindrical shaft (hour hand shaft) 24b projects above the front case 1a, and this projected. The hour hand 7a is attached to the part.

The time adjustment mechanism 12 adjusts the hands of the hour hand 7a and the minute hand 7b, and includes a hand wheel 26 and a transmission wheel 27.The rotation of the hand wheel 26 rotates the transmission wheel 27 to rotate the minute hand shaft of the minute hand wheel 22.
Rotate 22c. That is, the handwheel 26 is rotatably provided on a shaft 17b provided on the lower surface of the intermediate support 17, and the shaft 2
6a protrudes downward from the rear case 1b, and a knob 26b is provided at the protruding portion. The transmission wheel 27 is rotatably provided on a shaft portion 17c provided on the lower surface of the intermediate receiver 17, a part of the gear portion meshes with the handwheel 26, and the other part is the second pinion 22b of the minute hand wheel 22. , Thereby transmitting the rotation of the hand wheel 26 to the minute hand wheel 22. Therefore, when the handwheel 26 is rotated by the knob 26b, the time is transmitted to the minute hand wheel 22 by the transmission wheel 27, whereby the minute hand shaft 22c of the minute hand wheel 22 is rotated to move the minute hand 7b. At the same time, the hour wheel 24 rotates through the minute wheel 23 to move the hour hand 7b, and the hands are adjusted. At this time, the shaft portion 22c and the gear portion 22d of the minute hand wheel 22 slip and rotate with each other, the rotation of the shaft portion 22c is not transmitted to the gear portion 22d, and the third wheel 21 and below do not rotate.

The alarm mechanism 13 sets the alarm hand 7d to the alarm time and emits an alarm sound at the set time. The alarm set car 28 and the alarm set car 28
An intermediate wheel 29 that meshes with and rotates, a reference wheel 30 that meshes with the intermediate wheel 29 and rotates to move the alarm hand 7d, and an alarm intermediate wheel 31 that meshes with the hour wheel 24 of the wheel train mechanism 11 and rotates. An alarm set including a second hour wheel 32 which is engaged with the intermediate alarm wheel 31 and rotates, and switch springs 33 which come into contact with and separate from fixed contacts in accordance with the vertical movement of the second hour wheel 32. A wheel 28 and a second hour wheel 32 are rotatably mounted on a shaft portion 1a ₁ formed on the lower surface of the front case 1a, and an intermediate wheel 29 and an alarm intermediate body 31 are mounted on a lower surface of the front case 1a by a mounting shaft 34. The indicator wheel 30 is rotatably mounted on the outer periphery of the hour wheel 24. In this case, the alarm set wheel 28 is rotated by operation of an alarm knob (not shown), is rotatably mounted on the shaft portion 1a ₁ of the front case 1a, and has a concave portion 28a formed on the lower surface thereof. Is leaf spring 2
8b, it is slightly pushed down and is in elastic contact with the lower second hour wheel 32. The second hour wheel 32 is always rotated by the hour wheel 24 via the alarm intermediate wheel 31.
Disposed on the lower side of the mounted rotatably and vertically movable in the axial section 1a _1, removably inserted in a recess 28a formed on the lower surface of the alarm setting wheel 28 ... the alarm time on the upper surface thereof A convex portion 32a is formed, and switch springs 33, 33 are elastically contacted with the lower surface.
It is biased upward at 3,33. This switch spring 33, 3
Reference numerals 3 denote leaf springs, respectively, which are provided on the circuit board 18 and constantly push up the second hour wheel 32, and are disposed above when the convex portion 32a is inserted into the concave portion 28a of the alarm set wheel 28. An alarm signal is output by contacting a fixed contact (not shown). The reference wheel 30 has a cylindrical shaft 30a slightly protruding above the front case 1a, and an alarm hand 7d is attached to the protruding portion.

The day / night display mechanism 15 switches between the morning (AM) and the afternoon (PM), and meshes with the alarm intermediate wheel 31.
Day and night display car 35 that rotates once in 24 hours, and this day and night display car 35
And a day / night display board 36 which is attached to and rotates integrally. The day / night display car 35 has a front case 1a
The upper end of the shaft is formed in a cylindrical shape, the cylindrical portion is exposed upward through the front case 1a, and the day / night display plate 36 is provided on the exposed portion. Installed. In the day / night indicator 36, a shaft provided on the lower surface of the disk is screwed into the upper end of the shaft of the day / night indicator 35 from above the front case 1a.
The upper surface of the disk is colored (for example, yellow in the morning and black in the afternoon) so that the morning and afternoon can be distinguished as shown in FIG. Is a small window 6a of the dial 6 in which the sun and the moon are formed and a part of the upper surface of the day / night display plate 36 is provided on the front case 1a.
Visible from. In this case, since the day / night display board 36 is an analog type that makes one rotation in 24 hours, if the day / night display board 36 is only color-coded, the two colors are almost the same at “0:00” in the morning and “0:00” in the afternoon. Since it can be seen from the small window 6a and it is difficult to distinguish between morning and afternoon, the sun or the moon is displayed so that it is possible to know whether it is "0" or "0".
In addition, 1 to 12 hour characters are provided around the dial 6, and the small window 6a is provided near "1 o'clock".

The Hino back revolution mechanism 14 transmits the rotation of the watch glass 2 only to the hour hand wheel 24 to move the hour hand 7a and the day / night display plate 36 by the time difference, as shown in FIGS. 5 to 7.
The watch glass 2, an idler wheel 37 rotated by the watch glass 2, a Hino reverse truck 25 rotated by the idler wheel 37 to revolve the Hino reverse wheel 23, and a Hino reverse truck 25
And a regulating member 38 for regulating the rotation of. That is, as described above, the watch glass 2 is formed of a substantially disk-shaped glass plate, and a cylindrical portion 2a is integrally formed at a lower portion of the periphery thereof. The lower portion of the cylindrical portion 2a is While being rotatably mounted between,
An internal gear 2b is formed at a lower portion inside the cylindrical portion 2a. The idler wheel 37 transmits the rotation of the watch glass 2 to the back trolley 25, and is provided on the lower surface of the front case 1a and has an intermediate support.
It is rotatably mounted on a shaft 1a ₃ supported by 17, and has a first gear portion 37a on the upper side on the outer periphery thereof and a second gear portion 37a on the lower side.
Gear portions 37b are formed, the first gear portion 37a meshes with the internal gear 2b of the watch glass 2, and the second gear portion 37b meshes with the Hino backing cart 25. Hino back cart 25 is an idler car 37
To rotate the hour wheel and minute wheel 23 to revolve, thereby rotating the hour hand wheel 24 with time difference to know the time of each city in the world, and the cylindrical shaft 25b is a cylindrical member of the intermediate bearing 17. Bearing 1
7a
A portion of 25b is cut out, and a support shaft 25a for supporting the Hino wheel 23 is erected near a portion corresponding to the cut-out portion, and 11 support members are provided on the lower surface as shown in FIG. Pin protrusion 25
c ... are provided annularly at equal intervals. Therefore, in the normal watch mode, the Hino back trolley 25 does not rotate because the pin projections 25c are regulated by the regulating member 38 described later, but when the watch glass 2 rotates, it resists the regulating force of the regulating member 38. The hour wheel & pinion 23 supported by the support shaft 25a revolves, thereby rotating the hour hand wheel 24 and moving the hour hand 7a by the time difference. When the Hino back wheel 25 rotates, since the minute hand wheel 22 is directly connected to the rotor 10a of the step motor 10, the minute hand wheel 22 does not rotate, and the Hino back wheel 23 is the second hand of the minute hand wheel 22. It revolves while engaging with one kana 22a.

In order to move the hour hand 7a by the time difference in this way, the number of teeth of each gear is set as follows. That is, the number of teeth of the internal gear 2b of the timepiece glass 2 is 96, the number of teeth of each of the first and second gear portions 37a and 37b of the idler wheel 37 is 31, respectively, and the number of teeth of the The number is 44, the first kana of the minute hand wheel 22
22a has 10 teeth, and Hino wheel 23 has 30 teeth.
In addition, the number of teeth of the kana 23a of the Hino minute wheel 23 is eight,
Has 32 teeth. Therefore, when the watch glass 2 is rotated by 15 ° (a rotation angle for designating a city having a time difference of one hour, hereinafter referred to as one step), the number of teeth of the internal gear 2b of the watch glass 2 becomes four. Hino back trolley to move
25 turns 1/11 turn. That is, the Hino back cart 25 makes one rotation in 11 steps. In this way, the Hino back trolley 25 rotates 1/11 rotation (360
(゜ x 1/11 rotation) Rotate. (However, 10 is the number of teeth of the first pinion 22a of the minute hand wheel 22, and 30 is the number of teeth of the Hino minute wheel 23.) When the Hino minute wheel 23 rotates in this way, the Hino minute wheel 23 If does not revolve, the hour hand wheel 24 Rotate. (However, 8 is the number of teeth of the pinion 23a of the Hino wheel 23 and 32 is the number of teeth of the hour wheel.) However, since the Hino wheel 23 revolves, the hour wheel 24 becomes Rotate. That is, when the timepiece glass 2 rotates 15 °, the hour wheel 24 rotates 1/12 rotation, that is, 30 ° (one hour).

The restricting member 38 for restricting the rotation of the back trolley 25 as described above is fixed in the recess 17c of the intermediate support 17, and is configured as shown in FIGS. 6 and 7. That is, the regulating member 38 is a flat plate made of a synthetic resin, and the center thereof is cut out in an arc shape to form a concave elastic portion 38a on one side thereof.
Of the 11 pin projections 25c formed on the lower surface of 25, 2
The two pin projections 25c, 25c are elastically locked. in this case,
At the center of the elastic portion 38a, a mountain-shaped protrusion 38b inserted between the two pin protrusions 25c, 25c is formed. Therefore, each time the watch glass 2 rotates 15 °, the restricting member 38 moves the projection 38b of the elastic portion 38a to the next pin projection 25 of the Hino backing cart 25.
Insert between c and 25c with a click feeling to regulate the position of Hino back cart 25.

Next, the case where the world clock configured as described above is used will be described.

Normally, the hour hand 7a, the minute hand 7b, and the second hand 7c move through the wheel train mechanism 11 by the step motor 10, and the reference mark, that is, the alignment mark of the city name and the watch case 1 displayed on the city display plate 5 of the watch glass 2. The time in a city where the number 8 coincides, for example, in London in FIG. 1 and in Tokyo in FIG. 2, is indicated. That is, when the rotor 10a of the step motor 10 rotates, the fourth wheel 20 rotates through the intermediate wheel 19, whereby the second hand 7c moves, and when the fourth wheel 20 rotates, the third wheel
The minute hand 22 is rotated via 21 and thereby the minute hand 7b moves. When the minute hand 22 further rotates, the hour wheel 24 is rotated via the minute wheel 23 and thereby the hour hand 7a moves. In this case, the Hino reverse cart 25 provided with the Hino reverse wheel 23 is not rotated since the position is regulated by the regulating member 38. Therefore, the Hino wheel 23 does not revolve,
Rotate on the spot. When the hour wheel 24 rotates in this way, the second hour wheel 32 and the day / night indicator wheel 35 also rotate via the alarm intermediate wheel 31 to rotate the day / night indicator plate 36, and the small window 6a of the dial 6 And one of the afternoons.

In order to know the time of each city in the world with such a world clock, the name of the city for which the user wants to know the time can be set to the alignment mark 8 of the watch case 1 by turning the clock glass 2 on the front.
For example, as shown in FIG. 1, "LONDON" on the city display plate 5 matches the alignment mark 8, and the time in London is "10:10 am", and the watch glass 2 is turned. As shown in FIG. 2, when "TOKYO" of the city display plate 5 is set to the alignment mark 8, the hour hand 7a and the day / night display plate 3
6 moves and displays the time in Tokyo, "7:10 pm". That is, when the watch glass 2 rotates, as shown in FIG. 5, since the first gear portion 37a of the idler wheel 37 meshes with the internal gear 2b of the watch glass 2, this idler wheel 3
7 rotates together with the watch glass 2, and the second gear portion 37 b of the idler wheel 37 meshes with the Hino reverse carriage 25, whereby the rotation of the idler wheel 37 is transmitted to the Hino reverse carriage 25.
When the rotation of the idler wheel 37 is transmitted to the back trolley 25 in this way, the back trolley 25 rotates against the elastic force of the elastic portion 38a of the regulating member 38. In this case, watch glass 2 is 15
毎 Each time it rotates, the Hino back trolley 25
With a click feeling due to the protruding portion 38b formed on a, 1 /
Rotate 11 at a time. When the Hino minute wheel 25 rotates in this way, the Hino minute wheel 23 revolves while rotating while meshing with the first pinion 22a of the minute hand wheel 22, and rotates the hour hand wheel 24 by 30 °. In this state, since the minute hand wheel 22 is directly connected to the step motor 10, it does not rotate. Therefore, the hour wheel 24 rotates according to the rotation of the watch glass 2, but the minute wheel 22 and the fourth wheel 20 do not rotate, and only the hour hand 7a moves. When the hour hand wheel 24 rotates in this way, the alarm intermediate wheel
31 rotates, and this alarm intermediate wheel 31 displays day and night
Rotate the day and night display board provided in this day and night display car 35
Also rotate 36. Thus, either morning or afternoon is displayed from the small window 6a of the dial 6. That is, as shown in FIG. 1, the time in London is in the morning (open),
When the watch glass 2 is turned and set in Tokyo as shown in FIG. 2, afternoon (shown by oblique lines) is displayed on the small window 6a of the dial 6, thereby distinguishing between morning and afternoon.

When the user wants to know the time of the city in which daylight saving time is implemented, he turns the watch glass 2 to match the desired city name with the daylight saving time mark 9. Then, in the same manner as described above, only the hour hand 7a and the day / night display plate 36 move, and the time in summer time in the city can be known.

To set the alarm time, the alarm switch (not shown) is operated to set the alarm hand 7d to a desired time, and the stop switch 4 is turned on. In other words, the alarm set
When the wheel 28 rotates, the reference wheel 30 is rotated via the intermediate wheel 29, whereby the alarm hand 7d is set at a desired time, and the rotation of the alarm set wheel 28 pushes down the second hour wheel 32, and the switch spring Press down 33, 33. As a result, the alarm time is set. When the time advances in this state, the second hour wheel 32 of the wheel train mechanism 11 rotates while elastically contacting the lower surface of the alarm set wheel 28 via the intermediate alarm wheel 31 by the hour wheel 24. . When the set alarm time comes, a convex portion formed on the upper surface of the second hour wheel 32
32a is inserted into a concave portion 28a formed on the lower surface of the alarm set wheel 28, whereby the second hour wheel 32 is connected to the switch springs 33, 33.
As a result, the switch springs 33, 33 contact a fixed contact (not shown) thereabove to output an alarm signal and emit an alarm sound. In order to stop the alarm sound, the stop switch 4 may be pressed to be turned off. If you turn the watch glass 2 and display the time of another country, the alarm will sound at the time of the other country. Need to be kept. Conversely, this can be used to sound an alarm at the time of another country.

The time can be adjusted by turning the watch glass 2 to match the name of the city where the user is to the alignment mark 8 and operating the knob 26b of the time adjustment mechanism 12 in this state. That is, knob 2
Turning 6b rotates the needle wheel 26, and this rotation
Is transmitted to the minute hand wheel 22, whereby the minute hand wheel 22 is rotated, the hour hand wheel 24 is rotated via the minute wheel 23, and this rotation is transmitted via the alarm intermediate wheel 31 to the day / night indicator wheel 35. Is rotated, and the minute hand 7b, the hour hand 7a, and the day / night display board 36 move to correct the time.

As described above, according to the above-described world clock, the time of each city in the world can be easily known and the time can be read in the same state as a normal clock by an extremely simple operation of simply turning the clock glass 2. Therefore, the time can be read easily and easily.

In the above-described embodiment, the watch glass 2 is rotatably provided on the watch case 1 as a rotating operation member, and cities around the world are displayed on the periphery of the watch glass 2. However, the present invention is not limited to this. A bezel ring may be rotatably provided on the outer periphery, and each city in the world may be displayed on the bezel ring.

In addition, the present invention is not limited to the travel watch type described above, but can be widely applied to other hand-held timepieces such as watches.

[Effects of the Invention] As described in detail above, according to the pointer-type world timepiece of the present invention, the city display plate on which the names of the cities in the world are printed according to the time difference is placed on the periphery of the upper surface of the watch glass. By rotating this watch glass and specifying one of the city names displayed on the city display board, the rotation of the watch glass is transmitted to the Hino back trolley via the intermediate wheel, By rotating the hour hand wheel with the rotation of the back trolley and rotating the hour hand wheel, the hour hand moves according to the rotation angle of the watch glass, and the time of the city name specified by this hour hand is indicated. Since there is no need to move the hour hand with a separate motor, the simple operation of turning the watch glass to match each city name automatically moves the hour hand to indicate the time of the specified city name. Which allows each of the world The time of the city can be easily read.

[Brief description of the drawings]

FIGS. 1 to 7 show an embodiment in which the present invention is applied to a travel watch type world timepiece. FIGS. 1 and 2 are front views showing the use state of the timepiece, and FIG. 3 is a watch case. FIG. 4 is an enlarged sectional view of a main part showing a clock movement incorporated in the inside, FIG.
FIG. 5 is an enlarged sectional view of a main part of the Hino back revolution mechanism, FIG. 6 is an exploded perspective view thereof, and FIG. 7 is an enlarged bottom view showing the relationship between the Hino back cart and the regulating member. 2 ... watch glass, 11 ... train wheel mechanism, 14 ... Hino back revolution mechanism, 22 ... minute hand wheel, 23 ... Hino back wheel, 24 ... hour hand wheel,
24b …… Cylinder shaft (hour hand shaft), 25 …… Hino back trolley.

Claims (1)

(57) [Claims] A minute hand having a minute hand shaft to which a minute hand is attached; an hour hand wheel having an hour hand shaft to which an hour hand is attached, and rotatably provided around an axis of the minute hand shaft; A Hino back wheel that transmits rotation to the hour hand wheel, A Hino back wheel rotatably provided around the center axes of the minute hand shaft and the hour hand shaft, and rotatably supporting the Hino wheel on an upper surface. A trolley, a watch glass that is rotatably disposed over the minute hand and the hour hand, and that rotation is transmitted to the Hino back trolley via an intermediate wheel, and a peripheral portion of an upper surface of the watch glass. Provided, a city display board in which each city name in the world is printed in a circumferential shape corresponding to the time difference, and wherein any of the respective city names displayed on the city display board by rotating the watch glass The rotation of the watch glass is routed through the intermediate wheel The hour hand is transmitted to the hour wheel and the hour wheel is rotated according to the rotation of the hour wheel and the hour wheel is rotated to thereby rotate the hour hand according to the rotation angle of the watch glass. , And indicates the time of the city name designated by the hour hand.