JPS6352348B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a world travel clock that can easily change and display the local time of each city in the world with a switch operation, and particularly relates to a world travel clock that can easily change and display the local time of each city in the world by operating a switch. A world travel watch that always displays the time in the set city on one time display section, and also selects and displays the local time of each city in the world on a separate time display section. It is something.

[Prior Art] Nowadays, as people travel around the world and interact with other countries around the world, the number of calls from travel destinations around the world to their home countries and international calls to other countries is increasing. In that case, you need to consider the local time in the country or city of the person you are making the international call to.
There are many cases where this can cause trouble. For example, when calling from Japan to the United States, you must first check the local time in the United States that corresponds to the current time in Japan, or you may cause trouble to the person you are calling. Normally, even if Japan's standard time is noon, it is often late at night or early in the morning in the other country, so it is always necessary to check the time difference when making international calls. Traditionally, the only way to obtain the local time of a destination country or city is to use the world time table, search for the country or place name on the map, and look up the local time for that location in a separate table. In addition, there are no companies that always have such world time difference tables,
Offices are rare, especially private households, which are nearly non-existent.
For this reason, there has been a problem in that it is difficult to obtain the local time of a desired country or city in an emergency. Another drawback was that calculating time differences was troublesome.

[Summary of the Invention] The present invention has been made to solve such problems, and an object of the present invention is to provide a world travel clock that can easily switch and display the local time of each city in the world by operating a switch. With the goal. In particular, in the present invention, in such a world travel watch, by setting one basic city in the world, the time in the set city is always displayed on one time display part, and the time display side by side It also features a separate time display section that allows you to select and display the local time of each city in the world by operating a switch. As a result, the world travel watch of the present invention displays both the local time of the base city and the local time of each destination city in the world, so when making an international call, etc. You can display the local time of each
The relationship is clear at first glance and does not cause any trouble to the other party. In addition, this basic city setting can be easily done by switching the selected city, so even when traveling around the world, you can easily know the local time in each city around the world based on the local time at your destination. .

Still another object of the present invention is to provide a world travel watch that allows the local time of each city in the world to be selectively displayed by easily changing the local time of each city in the world by operating a switch, in which the selected city whose local time is selectively displayed can be easily changed. As can be seen, the object is to provide a world travel watch that also has a selected city display section that displays selected cities by displaying their city names at their positions on a world map.

Still another object of the present invention is to provide a world travel watch that can easily switch and selectively display the local time of each city in the world by operating a switch.
Particularly, it is an object of the present invention to provide a world travel watch in which alarm settings can be set for either local time or world time.

These other objects are achieved in the present invention by providing a selected city display section that displays the selected city by displaying the city name at the position on the world map, and by providing a selected city display section that displays the selected city by displaying the city name at the position on the world map. Memory circuit, local time alarm setting memory circuit,
This is achieved by providing a comparison circuit that compares the arm setting time with the time of the clock section.

[Embodiments of the Invention] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an external view showing the world travel watch of the present invention. Here, 101 is the housing of the world travel watch, 102 is a selected city display section that displays the name of the local city at the local time displayed on the selected city time display section 108 at the corresponding position on the world map, and 103 is the selected city display section 108. The city name displayed in the selected city display section 102,
Display using city names that represent the area according to the longitude on the earth. Here we have Wellington, Honiara, Sydney, Tokyo, Hong Kong, Bangkok, Datuka, Karachi, Muscat, Metuka, Cairo, Paris, London, Pico Island, Praia, Rio de Janeiro, Caracas, New York, Chicago, Denver, San Francisco, Dawson, Honolulu, Each city in Midway is used. 10
4 and 105 are city selection switches, which are a left shift switch and a right shift switch, respectively. By pressing left shift switch 104 or right shift switch 105 of the city selection switch, a city counter (to be described later) is raised or lowered to select a specific city. 106 is a time display section, which includes a set city time display section 107 and a selected city time display section 108.
It is composed of a combination of The selected city time display section 108 displays the specified city time display section 107 when the same city as the specified city set by the specified city setting switch is selected as the selected city.
It works as an extension of , and can be switched to display the month and day of the designated city. Reference numeral 109 is a switch for setting/cancelling a time difference signal generated from a time difference signal generation circuit to be described later for summer time, and reference numeral 110 is a designated city setting switch for setting a basic designated city. 111 is a reset switch, 11
2 is a mode switch, 113 is a set switch,
114 is a date/alarm switch. Use the reset switch when replacing batteries. The mode switch 112 and the set switch 113 are used to adjust the time, month, day, and alarm time, and to set the hourly signal and time. These switches are similar to those attached to ordinary electronic watches and are well known, so a detailed explanation will be omitted. Date/alarm switch 11
4 is for displaying the month and day in the city of the displayed local time, confirming the alarm time, and making the above corrections. These operating switches allow you to set this world travel watch to various modes.
In addition to displaying the current time of the designated city as the base city, the local time of each city in the world is also displayed together with the city name at the corresponding position on the world map. For example, "Tokyo" is a designated city.
is set, the current time in "Tokyo" is always displayed on the designated city time display section 107, and the city selection switch 10 is displayed on the selected city time display section 108.
The local time of the city selected in step 4,105 is displayed. In this case, the selected city name is displayed at the corresponding position on the world map of the city display section 102.
flash to indicate the city is selected.

The designated city is set as the base city by pressing the designated city setting switch 110. For example, if the designated city is currently "Tokyo" and you want to change the designated city to "London", press the left shift switch 104 of the city selection switch.
Alternatively, press the right shift switch 105 to shift the flashing city names in order.
Match "London". Then, by pressing the designated city setting switch 110, the designated city is changed to "London." At this time, the previously selected city "London" is set as the designated city, and the local time of "London", which is the local time displayed in the selected city time display section 108, is set as the designated city time display section 107. will be displayed. In the selected city time display section 108 in the lower row, since the selected time and the designated city match, the local time is not displayed, but the month and day of the designated city is displayed. At this time, by operating the city selection switches 104 and 105 to change the selected city to a location other than "London," the selected city time display section 108 stops displaying the month and day of the specified city, and the selected city is changed. Displays the local time in the city. This selected city name is the corresponding position on the world map of the city display section 102,
It is represented by the city name flashing. When the date/alarm switch 114 is pressed here, the world time (local time of the selected city) disappears from the selected city time display section 108 that displays the local time of the city that is flashing on the city display section. The month and day of the flashing city will be displayed. In this case, a status display of "WORLD, DATE" is also displayed on the auxiliary display section of the time display section 108 to indicate that the numerical data currently displayed is month and day. The month and day display is controlled by a control circuit (not shown) so that the display automatically returns to the world time display after 5 seconds, for example.

FIG. 2 is a block diagram of a display section schematically showing the structure of a liquid crystal display used as the time display section 106. As shown in FIG.

Here, the designated city time display section 107 includes an hour display section 201, a minute display section 202, a second display section 203, and a morning/afternoon mark 208. The selected city time display section 108 displays the time of the city that is flashing on the city display section, along with auxiliary displays for mode display indicating the status of the world time display 211, date display 212, alarm display 213, etc. Displays the month, date, and alarm set time. 209,2
10 is the daylight saving time set display, and since daylight saving time has different application periods in the northern and southern hemispheres,
When the applicable period comes, turn off the summer time switch 10.
Press 9, "NORTH SUMMER" mark 20
9 or “SOUTH SUMMER” mark 210
Display and set. When this mark is displayed, it indicates that the time difference signal generation circuit, which will be described later, is set to the daylight saving time state. 204
is the hour signal set mark, and when this mark is displayed, the time signal is set to emit, and the time signal will sound every hour, such as at 10:00 and 11:00. The setting and canceling of this hourly gift is performed by the set switch 113. 205 is an alarm set mark indicating whether or not the alarm is set to sound. 206 is a world time alarm set mark, and 207 is a local time alarm set mark, each of which indicates whether an alarm is set for either world time, local time, or both.

FIG. 3 is a block diagram showing the circuit configuration of the world travel watch of the present invention.

In FIG. 3, 301 is a reference time signal source that is composed of a crystal oscillator and a frequency divider and outputs a 1-second pulse, and 302 is a standard that receives 1-second pulses from the reference time signal source 301 and counts the reference time. The clock section consists of an hour, minute, and second counter and a month and day counter. 303 is a time difference signal and reference clock section 30
An adder/subtractor 304 receives the output from the reference clock unit 302 and outputs the local time of the designated city; an adder/subtractor 304 receives the reference time signal and the time difference signal from the reference clock unit 302 and calculates and outputs the local time of the selected city; 305 is a city counter that counts up or down with the city selection switches 104 and 105 and outputs the selected city number; 306 is a city counter 305;
307 is a time difference signal output circuit, and 308 is a summer time storage circuit. The time difference signal output circuit 307 and the summer time storage circuit 308 constitute the time difference signal generation circuit 306. 309 is a designated city time difference storage unit which receives the switch input of the designated city setting switch 102, stores the time difference signal outputted by the time difference signal generation circuit 306 at that time, and stores the time difference signal stored in the adder/subtractor 303. Output. As a result, a designated city will be set. A comparator 310 determines whether the output of the designated city time difference storage section 309 and the output of the time difference signal generation circuit 306 match. Switch the display between the local time of each city in the world or the month and day of the specified city. Reference numeral 311 indicates a reference time alarm setting memory circuit for setting the alarm setting time based on the reference time, 312 indicates a local time alarm setting memory circuit for setting the local time alarm setting time of the city set by the city selection switch, and 313 and 314 indicate these standards. 315 is a driver for generating an alarm sound, and 316 is an annunciator such as a speaker or a buzzer for outputting an alarm sound. The local time alarm setting storage circuit 312 stores the alarm setting time and the output of the city counter indicating the selected city, as well as its time difference signal. A decoder 317 displays the output of the city counter 305 in correspondence with the position on the world map of the city display section 102. 107 is a designated city time display section, 108 is a selected city time display section, and data buffer memories 107' and 10 are used for displaying time data, respectively.
It has 8'. The time display section stores month and day data that is not currently displayed, and by operating an external switch (not shown), such as a date/alarm switch, the month and day data for the selected city can be displayed. The date of this month/day data is changed based on the result of addition/subtraction between the reference time and the time difference signal of each selected city.

The operation of the world travel watch of the present invention shown in FIG. 3 will be explained below.

Reference signal source 3 consisting of a crystal oscillator and frequency divider
The 1-second pulse of the reference signal generated from 01 is counted by the second, minute, and hour counters and month and day counter of the reference clock section 302 to mark the reference time. city counter 3
05 is counted up or down by city selection switches 104 and 105, and outputs a city number which is a count output indicating a predetermined city. The city number from the city counter 305 is converted by the decoder 317 into position data for displaying the city name at the corresponding position on the world map on the city display section 102, and the city name of the city number is flashed on the city display section 102. Is displayed.

On the other hand, the city number from the city counter 305 is added to the time difference signal generation circuit 306, and from the time difference signal generation circuit in which the time difference with respect to the reference time from the reference clock section 302 is set in advance to correspond to the city number, the time difference for that city number is sent. A signal is output. This time difference signal is applied to the adder/subtractor 304, which calculates the time difference between the reference time and displays the time on the selected city time display section 108 as the local time of the city selected by the city counter 305.

Then, the time difference of the designated city with respect to the reference time is stored in the designated city time difference storage section 309 by the time signal generation circuit 30 by the operation of the designated city setting switch 112.
A time difference signal is received and stored from 6, and this stored time difference signal is supplied to an addition/subtraction circuit 303. The addition/subtraction circuit 303 receives the time difference signal from the designated city time difference storage section 309 and the reference time from the reference clock section 302, calculates the time difference, and displays the current time of the designated city with the time difference corrected on the designated city time display section 107. do. Therefore, the world travel watch of the present invention has two time display sections 107 and 108.
The time display section always displays the current time of the designated city as the base city, and the city counter 305 displays the local time of the selected city, so that two local times are displayed. At that time, the selected city name will be flashed at the corresponding position on the world map in the city display section 102.
It shows that the city is selected.
If the city selected by the city counter 305 and the designated city whose time difference is stored are the same, this is detected by the comparator 310, and at that time, the selected city time display section 108 does not display the time, but displays the month and day. The display data is switched by controlling the gate circuit to perform the following steps.

The reference time alarm time setting storage circuit 311 stores the alarm time at the reference time, detects when the reference time reaches the alarm time using the comparator 313, and drives the driver 315 that generates a notification sound. Sound the alarm. The local time alarm setting memory circuit 312 is used to set the alarm setting time in the local time of the city set by the city selection switch.In addition to the alarm setting time in the local time, the city number output from the city counter and the city It stores the time difference signal with respect to the reference time of
The alarm time is set by converting the alarm setting time into a reference time using a time difference signal. Then, the comparator 314 detects when the reference time reaches the alarm setting time.
It is determined by this and an alarm is sounded. As described above, in the world travel watch of the present invention, the alarm can be set in either the reference time or the local time.

Furthermore, in the present invention, switching to daylight saving time can be easily performed by operating a switch. This has a daylight savings time memory circuit in the time difference signal generation circuit 306, and the time difference signal generation circuit 306 can be
06 is set to generate a time difference signal corresponding to daylight saving time. Since the application period of daylight saving time (summer time) differs between the northern hemisphere and the southern hemisphere, the world travel clock of the present invention is designed to be compatible with each. As shown in Figure 2, by pressing the summer time switch, you can set summer time in the northern hemisphere (NORTH SUMMER), set summer time in the southern hemisphere (SOUTH SUMMER), or cancel summer time (no display).
settings can be made.

[Effects of the Invention] As explained above, in the world travel watch provided by the present invention, by setting one basic city in the world, the time display in the set city can be displayed in one time display section. In addition to displaying the local time in a separate time display section, the local time in each city around the world can be selected and displayed using a switch, so when making an international call, etc. By displaying both the local time and the local time of your home country, you can see the time difference and other relationships at a glance, and use it to make phone calls without bothering the other party.

Furthermore, in the world travel watch of the present invention, the alarm setting time can be set to either the reference time or the local time in a certain city, so when making an international call, you can use the alarm to know when the other party is convenient. It is convenient if you use it like making a phone call at that time.

[Brief explanation of the drawing]

FIG. 1 is an external view showing a world travel watch which is an embodiment of the present invention, FIG. 2 is a configuration diagram of a display section showing the display section of the world travel watch shown in FIG. 1 in detail, and FIG. 3 is a view showing the present invention. FIG. 2 is a block diagram showing the circuit configuration of the world travel watch. In the figure, 101...Housing of the world travel watch, 102...City display section, 103...City name, 104, 105...City selection switch, 10
6... Time display section, 107... Designated city time display section, 108... Selected city time display section, 109...
Summer time setting switch, 110...Specified city setting switch, 111...Reset switch, 1
12...Mode switch, 113...Set switch, 114...Date/alarm switch. In addition, in the figures, the same reference numerals and symbols indicate the same or equivalent parts.

Claims (1)

[Claims] 1. From a reference time signal source, a reference clock unit that receives the output of the reference time signal source and counts the reference time, a city counter that selects and specifies multiple cities in the world, a designated city time difference storage unit, and a city counter. A time difference signal generation circuit that generates a time difference signal based on the output of the time difference signal, an arithmetic circuit that calculates and outputs the local time from the reference time and the time difference signal, a designated city time display section, a selected city time display section, a designated city setting switch, and a city counter. Equipped with a city selection switch that moves forward, one of multiple cities around the world can be selected by operating the city selection switch, and a calculation circuit adds or subtracts the time difference corresponding to the reference time based on the output from the time difference signal generation, and the selected city time display section In addition to displaying the local time of the world city selected in , the specified city time display section always displays the local time of the specified city, which is set by adding or subtracting the time difference stored in the specified city time difference storage section to the reference time using an arithmetic circuit. A world travel watch featuring the following: 2. The designated city time difference storage unit stores an output from a time difference signal generation circuit that generates a time difference signal in response to an output of a city counter selected by operating the city selection switch, when the designated city setting switch is operated. A world travel watch according to claim 1. 3. The world travel timepiece according to claim 1, wherein the reference timepiece section comprises a time counter and a month/day counter. 4. The time difference signal generating circuit stores and holds daylight saving time setting information corresponding to each of a plurality of cities, and generates a time difference signal based on daylight saving time corresponding to each city by operating a switch. The world travel watch described in item 1. 5. A reference time signal source, a reference clock section that receives the output of the reference time signal source and counts the reference time, a city counter that selects and specifies multiple cities around the world, a designated city time difference storage section, and a time difference signal based on the output from the city counter. A time difference signal generation circuit, an arithmetic circuit that calculates and outputs local time from the reference time and time difference signal, a designated city time display section, a selected city time display section, and displays the selected city on a world map based on the output of the city counter. Selected city display section that displays city names at corresponding positions;
Equipped with a designated city setting switch and a city selection switch that increments the city counter, you can select any of multiple cities around the world by operating the city selection switch,
The selected city is represented by the city name at its position on the world map, and the calculation circuit adds or subtracts the time difference corresponding to the reference time based on the output from the time difference signal generation circuit, and the selected city's time is displayed in the selected city time display section. The local time of the designated city is displayed, and the designated city time display section always displays the local time of the designated city, which is set by adding or subtracting the time difference stored in the designated city time difference storage section from the reference time using an arithmetic circuit. Features a world travel watch. 6. The selected city display section always displays the name of the city to be selected at the corresponding position on the world map,
6. The world travel watch according to claim 5, wherein the selected city name is displayed in a blinking manner. 7. A reference time signal source, a reference clock unit that receives the output of the reference time signal source and counts the reference time, a city counter that selects and specifies multiple cities around the world, a designated city time difference storage unit, and a time difference signal that uses the output from the city counter. A time difference signal generation circuit, a calculation circuit that calculates and outputs the local time from the reference time and the time difference signal, a designated city time display section, a selected city time display section, a designated city setting switch, and a city selection switch that increments a city counter. When one of the world's multiple cities is selected by operating the city selection switch, the calculation circuit adds or subtracts the time difference corresponding to the reference time based on the output from the time difference signal generation circuit, and the selected city's time is displayed on the selected city time display section. A world where the local time of the designated city is displayed, and the designated city time display section always displays the local time of the designated city, which is set by adding or subtracting the time difference stored in the designated city time difference storage section from the reference time using an arithmetic circuit. In a travel watch, a reference time alarm setting memory circuit sets the alarm setting time based on the reference time, a local time alarm setting memory circuit sets the alarm setting time based on the local time of the city set by the city selection switch, and these alarm settings. This world travel clock is equipped with a comparison circuit that compares the time with a reference time and a local time, and is capable of setting an alarm at either the reference time or the local time. 8. The world according to claim 7, wherein the local time alarm setting storage circuit stores the alarm setting time in local time, the output of a city counter indicating the selected city, and the time difference signal thereof. travel watch.