JPS6117315B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a world clock with an alarm.

In conventional world clocks with alarms, it was possible to simply set the alarm time. Therefore, for example, if you are staying in a foreign country and want to set an alarm so that you don't forget to contact your home country at a specific time in your home country, you can calculate the time difference and convert the set time to the time in the country where you are staying. Calculation is troublesome because it has to be set in
Also, after setting it up, I sometimes had trouble figuring out which country and what time it was set to.

An object of the present invention is to provide a world clock with an alarm that can set both a desired country and the time in that country, which does not require any time difference calculations or time conversions, and which can be used anywhere. This allows you to see at a glance what time it is set in each country.

An embodiment of the present invention will be described. As shown in the first diagram, a city name display board 3 is disposed on the front of the clock frame A, and this display board displays the names of major cities in the world 1 arranged according to time differences. City scale 2 drawn from the city name is displayed.
In addition, the hour display plate 5 is operated by a clock mechanism (not shown).
It is fixed to the tip of a shaft 6 (Fig. 2) that rotates once every 24 hours, and at this time, a 24-hour time scale 4 is written on the display board facing the city scale 2. As shown in the second diagram, a pipe 9 of an alarm time indicating plate 8 is coaxially provided on the shaft 6, and this indicating plate is provided with an indicator needle 7 for indicating the alarm time. It rotates in conjunction with this shaft via a slip mechanism (not shown). At least the portion of the hour display plate 5 facing the indicator hand 7 is made of a transparent material, so that the indicator hand can be seen through from the front. Behind the indicator board 8, an alarm city indicator board 11 having an alarm city indicator mark 10 is rotatably provided. The city name display board 3 is made of a transparent material at least in the portion facing the alarm city indication mark 10, so that this mark can be seen through from the front.

〓〓〓〓〓
The alarm time indication plate 8 and the alarm city indication plate 11 can be rotated by rotating knobs 12 and 13 protruding from the front surface of the clock frame body A.

Alarm time indication board 8 and alarm city indication board 1
A switch mechanism is provided between 1 and 1. The structure of this mechanism is as follows:
For example, a magnet 14 is attached to the back of the alarm time indicator hand 7.
A reed switch 15 is embedded in a position on the city indicator board 11 that faces the magnet 14 when the city indicator mark 10 faces the indicator needle 7. Concentric annular conductive films 16 and 17 connected to both terminals of the reed switch 15 are formed on the back surface of the city indicator board 11, and contact pieces 18 and 19 are in elastic contact with both conductive films, respectively. A power source E and a time signal device B such as a buzzer are connected in series between the contacts. The switch mechanism includes a switch element including a magnet, a magnetically sensitive element, a protrusion, a pressure sensitive element, and other actuating elements and actuated elements.

In this example, the time scale 4 is in 10-minute increments, so in order to accurately read minutes less than 10 minutes, a hand that rotates once every 10 minutes is provided in conjunction with the clock train to read the time in 1-minute digits. It's good to wear. Further, in this example, a vernier scale 20 is formed on the city display board 3 opposite a part of the time scale 4. That is, the minimum interval N of the vernier scale 20 has the relationship N={(m-1)/m}M with respect to the minimum interval M of the time scale 4 in m-minute increments. In other words, in this example, m = 10 minutes, so N
Vernier scales 20 are formed at 10 intervals with an interval of =9/10M. Alternatively, N={(m+1)/m}M may be used.

Next, we will explain the operation when a person staying in London, New York, or other places other than Tokyo, for example, has to make a call at 6 a.m. in Tokyo. At this time, first turn the knob 13 to rotate the alarm city indication board 11 and align the city indication mark 10 with Tokyo. Next, turn the knob 12 to rotate the alarm time indicator plate 8 and set the time indicator hand 7 to 6:00 am. This completes setting the alarm. The rotation of the indicator plate 8 at this time is not transmitted to the shaft 6 because of the slip mechanism, and does not affect the watch wheel train.

When the hour display plate 5 rotates clockwise as time passes, the alarm time indicator plate 8 also rotates in conjunction with this, and the alarm time indicator hand 7 rotates clockwise. When the time in Tokyo reaches 6:00 a.m., the alarm time indicator hand 7 and alarm city indicator mark 10 will face each other, and the magnet 14 and reed switch 15 will face each other to close the switch. This closes the circuit and activates the buzzer to signal the time.

The time in each city can be read by reading the time scale 4 opposite each city scale 2. To accurately read the first digit, it is sufficient to read the number that matches the time scale 4 on the vernier scale 20. For example, when the vernier scale of "5" is in line with the time scale, the first digit is read. indicates 5 minutes.

After setting, it is easy to see in which country and at what time the alarm is activated by looking at the city name 1 at the location of the city indicator mark 10 and the time scale 4 pointed by the time indicator hand 7. Also, you can easily know at a glance how many hours from now it will be from the opening angle between the indicator hand 7 and the indicator mark 10. In the example shown in the first figure, the alarm will be activated after 8 hours. do.

As described above, according to the present invention, it is possible to directly set an alarm at a predetermined time in another country without calculating the time difference or converting the time, making it extremely easy to set the alarm. , you can see at a glance which country and what time it is set.
It has excellent effects such as making it easy to read the time.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, with FIG. 1 being a front view and FIG. 2 being a partially cutaway cross-sectional view. 1...Names of major cities in the world, 2...City scale, 4...
...Time scale, 5...Hour display board, 7...Alarm time indicator hand, 8...Alarm time indicator board, 10...
Alarm city indicator mark, 11... Alarm city indicator board, 14... Magnet, 15... Reed switch. 〓〓〓〓〓

Claims (1)

[Scope of Claims] 1. A time display board that rotates once every 24 hours and has a time scale for 24 hours, and a fixed time display board that faces the time scale and is drawn from the names of the world's major cities arranged in accordance with the time difference. a city name display board on which a city scale is displayed; an alarm time display board provided coaxially with the hour display board and interlocked with the display board via a slip mechanism and having an alarm time indicator hand; and a rotating alarm time display board. An alarm device comprising: an alarm city indicator board that is freely supported and has an alarm indicator city mark; and a switch mechanism that is activated when the indicator hand of the alarm time indicator board matches the alarm indicator city mark of the alarm city indicator board. world clock.