JPS60228985A - World tour clock - Google Patents

Abstract

PURPOSE:To make it possible to simply know the local time of each city in the world by switch operation, by together displaying the local time of a reference city and that of each desired city in the world. CONSTITUTION:The signal generated from a reference signal source 301 is counted by a reference clock part 302 to tick reference time. The city number from a city counter 305 is applied to a time differential signal generation circuit 306 and the time differential signal to the reference time from the reference clock part 302 is preliminarily outputted. This signal is applied to an adder/subtractor 304 and time differential is operated to display the time by a selected city time display part 108. The time differential is stored in an indicated city time differential memory part 309 and supplied to an addition and subtraction circuit 303. Then, the present time of the indicated city as a base city is always displayed by time display parts 107, 108 and the local time of the city selected by a city counter 305 and two local times are respectively displayed. At this time, the name of the selected city is displayed at the corresponding position on a world map by a city display part 102.

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 such cases, problems can often occur unless you take into account the local time of the country or city of the destination you are making the international call to. 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 a world time table, search for the country or place name on the map, and then look up the local time for that location in a separate table. Also, it is rare to find a company or office that always has such a world time difference table, especially in the general public. For this reason, there is 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 it was troublesome to calculate time differences.

[Summary of the Invention 1 The present invention has been made to solve such problems, and an object thereof 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. Particularly, in the present invention, in such a world travel watch, by setting one basic city in the world, the time display in the set city is always displayed on one time display section. In addition, the local time of each city in the world can be selected and displayed by a switch operation on a separate time display section provided side by side. As a result, the world travel watch of the present invention
The local time of the base city and the destination time of each destination city in the world are displayed together, so when making an international call, etc., you can display the local time of the other party and the local time of the other party, and the relationship between them. can be understood at a glance, and will not cause any trouble to the other party. In addition, this basic city setting can be easily done by switching the selected city switch, 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. .

Furthermore, another object of the present invention is to easily change the local time of each city in the world with a switch operation (in a world travel watch that can selectively display the local time, it is easy to easily change the local time of each city in the world). As can be seen, the object of the present invention 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. To provide a world travel watch that can be set.

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. This is achieved by providing a memory circuit, a local time alarm setting memory circuit, and a comparison circuit that compares the arm setting time with the time on the clock section.

[Embodiments of the invention] Embodiments of the present invention will be described in detail below 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 is displayed using a city name that represents the area according to the degree of lightness on the earth. Here we have Wellington, Honiara, Sitney, Tokyo, Hong Kong, Pankok,
Dhaka, Karachi, Muscat, Mecca, Cairo, Paris,
The following cities are used: London, Pico Island, Praia, Rio de Janeiro, Caracas, New York, Chicago, Denver, San Francisco, Dawson, Honolulu, and Midway. 104 and 105 are city selection switches, which are a left shift switch and a right shift switch, respectively. By pressing the left shift switch 104 or right shift switch 105 of the city selection switch, a city counter (to be described later) is increased or decreased to select a specific city. 106
is a time display section, which is constructed by combining a set city time display section 107 and a selected city time display section 108 into one body. The selected city time display section 108 displays, as the selected city,
When the same city as the designated city set with the designated city setting switch is selected, it functions as an extension of the designated city time display section 107 and is switched to display the month and day of the designated city. Reference numeral 109 is a switch for switching/setting a time difference signal generated from a time difference signal generating circuit to be described later for daylight saving time, and 110 is a designated city setting switch for setting a basic designated city. 111 is a reset switch, 112 is a mode switch, 113 is a set switch,
114 is a date/alarm switch. Reset 1~
The switch is used when replacing batteries. The mode switch 112 and 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. The date/alarm switch 114 is for displaying the month and day in the city of the displayed local time and for checking and correcting the alarm time. Using these operation switches, this world travel watch can be set to various modes, and will basically display the current time of the designated city as the base city, as well as display the local time of each city around the world at the corresponding location on the world map. It is displayed along with the city name display. For example, if "1 Tokyo" is set as the designated city, the current time of "Tokyo" is always displayed on the designated city time display section 107, and the selected city time display section 108 displays the current time of "Tokyo" on the city selection switch 104.105.
The local time of the city selected in is displayed. in this case,
The selected city name is flashed at the corresponding position on the world map of the city display section 102 to indicate that the city is selected.

Setting of a designated city as a base city is performed by pressing the designated city setting switch 110. For example, suppose that the designated city is currently "Tokyo", and this designated city is 1
If you want to change to "London", press the left shift switch 104 or right shift switch 105 of the city selection switch to shift the flashing city names in order until they 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" at the local time displayed in the selected city time display section 108 is displayed in the designated city time display section 107. The display changes. In the selected city time display section 108 at the bottom, since the selected city and the specified city match, the local time is not displayed.
The month and day of this designated city will be 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 designated city.
Display the local time for the selected city. The selected city name is indicated by flashing the city name at the corresponding position on the world map of the city display section 102. When the date/alarm switch 114 is pressed here, the world time (the local time of the selected city) disappears from the selected city time display section 108, which displays the local time of the city flashing on the city display section. The month and day of the flashing city will be displayed. In this case, the auxiliary display section of the time display section 108 displays [WO
Status indicators RLD and DATEJ are also displayed. 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 is the hour display section 201,
It consists of a minute display section 202, a second display section 203, and AM/PM marks 208. Selected city time display section 1
08 is world time display 211, date display 212
, alarm display 213 and other auxiliary displays for mode display indicating the status, the city display section displays the time of the city flashing, the month and day, and the alarm set time. 209.210 is the daylight saving time setting display, and since the applicable period of daylight saving time is different in the northern and southern hemispheres, when the applicable period comes, press the daylight saving time switch 109 and select "N0RTH5U
HHERJ mark 209 or JSOUTH5UHHE
Display the RJ mark 210 and set it. 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 hourly signal set mark, and when this mark is displayed, the hourly signal is set to be output.
The time signal will sound every hour, such as at 0:00 minutes and 11:00:00 minutes. Setting and canceling of this hourly signal are performed by a set switch 113. An alarm set mark 205 indicates whether or not an alarm is set to sound. 2
06 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 an adder/subtractor that receives the time difference signal and the output from the reference clock section 302 and outputs the local time of the designated city; 304 is the selected city that receives the reference time signal and the time difference signal from the reference clock section 302; 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;
3 is a time difference signal generation circuit that generates a time difference signal based on the output from the city counter 305; 307 is a time difference signal output circuit;
08 is a summer time memory circuit, and a time difference signal output circuit a! 307 and the summer time storage circuit 308 constitute a 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 and stores the time difference signal outputted by the time difference signal generation circuit 306 at that time;
The time difference signal stored in the adder/subtracter 303 is output. As a result, a designated city will be set. 310 is the output of the designated city time difference storage section 309 and the time difference signal generation circuit 30
This is a comparator that determines whether or not the output of 6 matches t, -c.The output of this comparator 310 determines whether the selected city time is displayed or not. Switch to display the month and day of the 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. A comparator that compares the time and local time alarm setting time with a reference time, 315 a driver to avoid generating an alarm sound, and 316 an annunciator such as a speaker or buzzer that outputs 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. 3
17 is a decoder for displaying 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, and 108 is a selected city time display section, each of which has data buffer memories 107' and 108' for displaying time data. A time display section stores date and month data that is not currently displayed, and by operating an external switch (not shown), such as an arch/alarm switch, the date and month data for the selected city can be displayed. This date and month data is
The date is changed based on the result of addition and 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.

A one-second pulse of a basic signal generated from a reference signal source 301 composed of a crystal oscillator and a frequency divider (counted by the second/minute/hour counter and month/day counter of the reference clock section 302 to mark the reference time). City counter 305 is city selection switch 1
It counts up or counts down at 04.105, 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. Lashing 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 added to the adder/subtractor 304, which processes the time difference between the reference time and the city counter 30.
The time is displayed on the selected city time display section 108 as the local time of the city selected in step 5.

The designated city time difference storage unit 309 stores the time difference of the designated city with respect to the reference time after receiving the time difference signal from the time difference signal generation circuit 306 by operating the designated city setting switch 112. is supplied to the 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 clock section 30.
2, the time difference is calculated and the designated city time display unit 107 displays the current time of the designated city with the time difference corrected. Therefore, in the world travel watch of the present invention, the time display section having two time display sections 107 and 108 always displays the current time of the designated city as the base city, and the local time of the city selected by the city counter 305. will be displayed, and two local times will be displayed. At this time, the selected city name flashes at the corresponding position on the world map on the city display section 102, indicating that the city has been 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 instead 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 with 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 The alarm time is set by converting the alarm setting time into the reference time using the time difference signal. Then, the comparator 314 determines when the reference time reaches the alarm setting time and does not sound the alarm. As described above, in the world travel watch of the present invention, the alarm can be set to either the reference time or the local time.

Further, in the present invention, switching to daylight saving time can be easily performed by operating a switch. This has a daylight saving time memory circuit in the time difference signal generating circuit 306, and the time difference signal generating circuit 306 is set to generate a time difference signal corresponding to daylight saving time by operating a switch. Summer time (summer time)
Since the period of application is different 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 the Northern Hemisphere summer time (NORT).
HSUMMER), Southern Hemisphere summer time setting (5OUTH
SUMMER) and can be set to cancel daylight saving time (no display).

[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 changed to one.
In addition to always displaying one time display, the local time of each city around the world can be selected and displayed at the touch of a switch on a separate time display, allowing international calls to be made up to 4 times. When calling, you can display the local time of the other party's side and your own country's side at a glance, and understand the relationship such as time difference at a glance. .

In addition, 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, etc., the other party's convenient time can be known by the alarm. It is convenient if you change the way you use the phone to make 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, 106...
Time display section, 107... Designated city time display section, 108... Selected city time display section, 109... Summer time setting switch, 110...
Designated city setting switch, 111...Reset switch, 112...Mode switch, 113...Set switch, 114...Date/alarm switch. In addition, in the figures, the same reference numerals and the same symbols indicate the same or equivalent parts. Patent applicant: Unionlux Co., Ltd. Agent: Takehisa Higuchi

Claims (8)

[Claims] (1) 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 that is determined by the output from the city counter. A time difference signal generation circuit that generates a 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 that increments the city counter. Equipped with a selection switch, one of the world's multiple cities can be selected by operating the city selection switch, and an arithmetic circuit adds or subtracts the time difference corresponding to the reference time based on the output from the time difference signal generation, and the world selected on the selected city time display section. In addition to displaying the local time of the designated city, 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 to the reference time using an arithmetic circuit. A world travel watch featuring: (2) The designated city time difference storage unit stores, when the designated city setting switch is operated, an output from a time difference signal generation circuit that generates a time difference signal in response to the output of the city counter selected by the operation of the city selection switch. A world travel watch described in a patent item characterized by: (3) The world travel timepiece according to claim 1, wherein the reference timepiece section includes 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 listed in item 1 of the scope. (5) 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 that is determined by the output from the city counter. A time difference signal generation circuit that generates a 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, and a world map that displays the selected city based on the output of the city counter. a selected city display section that displays the city name in the corresponding position above;
Equipped with a designated city setting switch and a city selection switch that advances the city counter, you can select one of multiple cities around the world by operating the city selection switch, and display the city name of the selected city with its position on the world map. At the same time, the time difference corresponding to the reference time is added or subtracted by the arithmetic circuit based on the output from the time difference signal generation circuit, and the local time of the world city selected is displayed in the selected city time display section, and is stored in the designated city time difference storage section. The world travel clock is characterized in that the local time of the designated city, which is set by adding or subtracting the time difference from the reference time using an arithmetic circuit, is always displayed on the designated city time display section. (6) The selected city display section always displays the name of the city to be selected at the corresponding position on the world map, and displays the selected city name in a blinking manner. The world travel watch described in item 5 of the scope. (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 that is determined by the output from the city counter. A time difference signal generating circuit that generates a signal, an fA camphor 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 that increments. Equipped with a city selection switch, one of multiple cities around the world is selected by operating the city selection switch, and the time difference corresponding to the reference time is subtracted by the calculation circuit from the output from the time difference signal generation circuit, and the selected city time display section In addition to displaying the local time of the world city selected in , the designated city time 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 the world travel watch, there is a reference time alarm setting memory circuit that sets the alarm setting time based on the reference time, a local time alarm setting memory circuit that sets the alarm setting time based on the local time of the city set by the city selection switch, A world travel clock characterized in that it is equipped with a comparison circuit that compares these alarm setting times with a reference time and local time, respectively, and can set an alarm at either m* time or local time. (8) The world travel clock according to the patent item, 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.