JPS59145990A - Time setting device - Google Patents

Abstract

PURPOSE:To reduce the number of setting operation switch by using a switching circuit and using one of adding and subtracting switches in common with other plural switches. CONSTITUTION:When a time setting indication switch 3 is turned on and a time setting addition switch 5, etc. is operated, the time such as an hour, etc. is set through a time setting device body 2. In response to the operation of this switch 5, the output of NOR gates 11, 12 for forming an R-S latching circuit become ''0'' and ''1'', respectively, and when a subtraction switch 8 is operated, the output of an OR circuit 9 becomes ''1'', and the set time is subtracted and corrected. On the other hand, even if the switch 8 is operated, unless a setting addition switch 7 is operated, the output of an OR circuit 10 does not become ''1''. By using this setting subtraction switch in common with plural setting addition switches, the number of the setting operation switches can be reduced.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a time setting device such as a clock.

2. Description of the Related Art Configurations of Conventional Examples and Problems Therein In recent years, time setting devices to which digital technology is applied have become generally known. FIG. 1 shows the configuration of a clock using the conventional time setting device. 1 is a time display section, 2 is a main body of the time setting device, 3 is a time setting instruction switch, 4 is a first subtraction switch that instructs subtraction of the hour digits, 5 is a first addition switch that instructs addition of the hour digits, Reference numeral 6 designates a second subtraction switch that instructs subtraction in analysis, and 7 designates a second addition switch that instructs addition in analysis.

In the conventional time setting device configured as described above, when setting the time to 12:00, for example, and when the state of the time setting device main body 2 is 11:00, first the time setting instruction switch 3 is turned on. After enabling the time setting, the time is set to 12:00 OO minutes by operating the first addition switch 5 once. Thereafter, when the time setting instruction switch 3 is turned off, time measurement starts from the set time of 12:00. However, in the above setting operation, if the first addition switch 5 is accidentally operated twice and the set time becomes 13:00, conventionally the first subtraction switch 4 must be pressed. 12:00 OO
minutes. Similar settings can be made using the second and third adjustment switches 6.7 for analysis settings.

However, the conventional configuration described above has the disadvantage that it requires a number of subtraction switches corresponding to the number of addition switches, which increases the number of switches in the operating section.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a time setting device which has a simple configuration and reduces the number of switches in the operating section compared to the conventional one.

Structure of the Invention The time setting device of the present invention is provided with both an addition terminal and a subtraction terminal for the hour digit and analysis, and a first and a second terminal, respectively, for one of the addition terminal and subtraction terminal of each digit. A third setting change switch is connected to the other terminal of the hour digit and the other terminal of the analysis via a switching means, and when the first setting change switch is operated, a third setting change switch is connected to the other terminal of the hour digit and the other terminal of the analysis The third setting change switch is connected to the other terminal of the hour digit until the second setting change switch is operated next, and when the second setting change switch is operated, the third setting change switch is connected to the first setting change switch. It is characterized in that the switch is configured to be connected to the other terminal of the assay until it is subsequently operated.

Description of examples Hereinafter, one embodiment of the present invention will be described based on FIG. 2.

It should be noted that those having the same functions as those shown in FIG. 1 will be omitted from explanation.

8 is a subtraction switch, 9.10 is an OR circuit, and 11.12 is a NOR circuit.

Next, the structure and operation will be explained in detail.

When setting the time, the first
, operate the second addition switch 5.7 to set it. For example, if the first addition switch 5 is operated, the R-8 latch circuit composed of the NOR circuits 11 and 12 will be
The input of the NOR circuit 110 becomes a logic level "H", and the output of the NOR circuit 11 becomes a logic level V', so the input of the NOR circuit 12 becomes a logic level "H", and the NOR circuit 12
The output becomes a logic level "L". This state continues unless the second addition switch 7 is operated. that time,
If you accidentally operate the first addition switch 5 too many times and the desired set time has passed, operating the subtraction switch 8 will cause the output of the A circuit 9 to become logic It L II, so that the subtraction of the hour digits will not be possible. It becomes possible. Also, the minute digit is exactly the same as the hour digit, and when the second addition switch 7 is operated, the subtraction switch 8 is connected to the subtraction terminal of the minute digit through the A circuit 10, and this state is reached. The process continues until the first addition switch 5 is operated and the R-S latch circuit formed by the NOR circuits 11 and 12 is inverted.

In the above embodiment, the first and second addition switches 5.7 are connected to the addition terminal of the hour digit and the addition terminal of the minute digit, respectively, using the first and second setting change switches. A subtraction switch 8 as a third setting change switch is connected to the subtraction terminal and the minute digit subtraction terminal via a switching means. The switches 4 and 6 are connected to the subtraction terminal of the hour digit and the subtraction terminal of the analysis, respectively, and the addition terminal of the hour digit and the addition terminal of the minute digit are connected to one addition terminal instead of the subtraction switch 8 through the switching means. A similar effect can be obtained by connecting a switch.

In the above embodiment, the switching means is
and Noah Gate 11.12 are configured only with Bardow J-A, but this can also be replaced with Microcombi 1-2 and software, especially if it is a time setting device using a microcomputer, it is possible to change the software. It can be achieved just by doing.

As described in detail, according to the time setting device of the present invention, by adding a simple switching means, the number of switches on the operating section can be reduced by one compared to the conventional one, and operability can be improved. There is thing C.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional time setting device, and FIG. 2 is a block diagram of an embodiment of the time setting device of the present invention. 1... Time display section, 2... Time setting device body, 3.
...Time setting instruction switch, 5...First adjustment switch [first setting change switch], 7...Second adjustment switch [second setting change switch], 8...Decrease Leopard switch (third setting change switch),,' 9.10・
...17 circuit, 11.12... Noah circuit agent Yoshihiro Moriki Figure 1 Figure 1 Procedural amendment (method) 1. Indication of case 1982 patent IA No. 20975
1. Name of the invention Time setting device 3 Relationship with the person making the amendment Patent applicant name (582) Matsushita Electric Industrial Co., Ltd. 4th Representative () Address: 1-6-1 Tachiuribori, 4-ku, Osaka-shi, 550
No. 7 Amano Building May 31, 1981 6 Number of inventions increased by amendment 7, engraving of the specification subject to the amendment (no change in content)

Claims (1)

[Claims] 1. Both an addition terminal and a subtraction terminal are provided for the hour digit and the minute digit, respectively, and the first and second setting change switches are respectively connected to one of the addition terminal and subtraction terminal of each digit. Connect the third terminal to the other terminal of the hour digit and the other terminal of the analyzer.
A setting change switch is connected through a switching means, and when the first setting change switch is operated, the third setting change switch is operated in turn, and the second setting change switch is operated. When operating the second setting change switch, connect the third setting change switch to the other terminal of the first setting change switch.
a time setting device configured to be connected to the other terminal of the assay until the settings change switch is subsequently operated;