JPH075437Y2 - Clock with daylight saving time correction function - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a timepiece with a summer time correction function.

[Prior Art] One day is 23 hours on the start day of the summer time period, and one day is 25 hours on the end day. Therefore, on the start day of the summer time period, 1 hour is deleted at the beginning of the day,
On that end date, one hour is added to the end of the day. Therefore, when transitioning from a period other than the summer time period (hereinafter referred to as "normal period") to the summer time period,
Alternatively, it is necessary to correct the time when shifting from the summer time period to the normal period.

In the conventional timepiece with the summer time correction function, the time display state is not changed during the last hour of the day when the summer time period ends.

[Problem to be Solved] Therefore, there is a problem that the progress of time cannot be grasped at all in the last hour of the end day of the summer time period.

The purpose of the present invention is to provide the last 1 of the end day of the summer time period.
It is an object to provide a timepiece with a daylight saving time correction function capable of surely grasping the time situation in time.

[Means for Solving the Problem] In the timepiece with the summer time correction function according to the present invention, the display of the "hour" display section of the digital display section is different from the normal display in the last hour of the end day of the summer time period. On the other hand, the display on the "minute" display section is the same as the normal display.

[Embodiment] Hereinafter, as an embodiment of the present invention, a timepiece with an automatic daylight saving time correction function for an office will be described with reference to the accompanying drawings.

FIG. 1 is a block diagram showing the configuration of the embodiment, FIG. 2 is a flow chart showing the operation of FIG. 1, and FIG. 3 is an explanatory diagram showing a time display state on the digital display unit of FIG. .

First, the components of FIG. 1 will be described.

The reference signal generation circuit 1 is for generating a 1-second pulse that serves as a time reference.

The setting unit 2 sets a start date and an end date of the summer time period, and is configured by a manual switch or the like.

The control circuit 3 controls the entire clock, and CP
It is composed of circuits such as U, ROM, RAM, and input / output interface. The control circuit 3 receives the 1-second pulse from the reference signal generation circuit 1 and manages the clock of hour, minute and second.
The date is also managed by the built-in calendar.
The control circuit 3 stores the start date and end date of the summer time period input from the setting unit 2, and detects the start date and end date by comparing with the month and day managed by the control circuit 3 itself. .

The digital display drive unit 4 drives the digital display unit 5 described later based on the time information from the control circuit 3.

The digital display unit 5 digitally displays the hour, minute, and second of the current time.

The analog display drive section 6 receives a signal from the control circuit 3 and drives an analog display section 7 described later.

The analog display unit 7 displays the hour and minute of the current time with a pointer.

The operation of the embodiment will be described below with reference to FIGS. 2 and 3.

When neither the start date nor the end date of the summer time period is set (a, b), the digital display unit 5 and the analog display unit 7 display normally (j, k). That is, the display is performed on the start date and the end date of the summer time period in exactly the same manner as the normal period.

When either the start date or the end date of the summer time period is set, the control circuit 3 determines the start date and the end date of the summer time period (c, f).

When the control circuit 3 detects the start day of the summer time period (c), the following operation is performed. On the digital display unit 5, as shown in FIG. 3, after displaying "23:59:59",
Display “1:00:00”. On the analog display unit 7, the hands are turned quickly until the hands indicate 1 o'clock. After that, the digital display unit 5 and the analog display unit 7 perform the normal display operation.

When the control circuit 3 detects the end date of the summer time period (f), the following operation is performed. On the digital display unit 5, as shown in FIG. 3, after displaying "23:59:59",
Display “24:00:00”. Then, during the last hour of the day when the summer time ends, the display of "minutes" and "seconds" is updated every 1 second from "00:00" to "59:59", and "hour" is displayed. "24" is displayed on the display. That is, "24", which is not normally displayed on the "hour" display, is displayed exactly as usual on the "minute" and "second" display.
Is displayed. Therefore, it can be recognized by the display part of "hour" that it is the last hour of the end day of the summer time period, and the progress of time can be recognized by the display parts of "minute" and "second". In this way, “24: 59: 5
After "9" is displayed, "0:00:00" is displayed. During this time, the analog display 7 continues to stop with the hands indicating 12 o'clock. After 1 hour, the digital display 5 And the analog display section 7 performs the normal display operation.

Needless to say, the digital display unit 5 and the analog display unit 7 perform a normal display operation when neither the start date nor the end date of the summer time period (j, k).

In the above description, the digital display unit 5 is displayed in the 24-hour system, but it may be displayed in the 12-hour system.
Instead of, you can display "13".

[Effect] In the timepiece with the daylight saving time correction function according to the present invention, it is possible to recognize that it is the last hour of the end day of the summer time period by the display part of "hour", and the time elapsed state during this time is the display part of "minute". Can be recognized by. Therefore,
Even in the last hour of the day when the summer time ends,
The time information can be surely grasped.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, FIG. 2 is a flow chart showing the operation of FIG. 1, and FIG. 3 is an explanation showing the time display state on the digital display section of FIG. It is a figure. 3 ... Control circuit 4 ... Digital display control unit 5 ... Digital display unit

Claims (1)

[Scope of utility model registration request] 1. A detection means for detecting an end date of a summer time period, a display means for digitally displaying a time by a "hour" display portion and a "minute" display portion, and the end date detected by the detection means. Last one
In terms of time, with the daylight saving time correction function, the display of the above "hour" display is different from the normal display, and the above "minute" display is similar to the normal display. clock.