JPS631994A - Time control circuit of digital time-piece - Google Patents

Abstract

PURPOSE:To obtain an inexpensive time control circuit capable of freely determining the arrangement of switches, by making a slow feed crown type switch and a quick feed push button type switch respectively independent and connecting both of them to the time control input terminal of the clock circuit of each switch. CONSTITUTION:When a control signal is inputted to the time control input terminal 1a of a clock circuit 1 and a VDD level is set at an advance slow feed time and a VSS level is set at a rearward slow feed time, the display times of a display device 2 respectively change every 1min. Further, at an advance quick feed time, an AC signal of a -VDD/2 level is inputted on the basis of VDD and, at a rearward quick feed time, an AC signal of the -VDD/2 level is inputted on the basis of VSS. Whereupon, displays respectively change in a quick feed manner. At a slow feed control time, the VDD and VSS levels are applied to the terminal 1a by a crown type switch 3 and advance quick feed control is performed by inputting the AC signal set by resistors 5a, 5b, 5c by a push button switch 4. By this constitution, the time control circuit of a digital time-piece is formed inexpensively and the arrangement of each switch can be freely selected.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a time adjustment circuit for a digital watch.

Conventional technology Conventionally, the time adjustment circuit of a digital watch uses a crown-type switch for adjusting the time and a push-button switch for fast forwarding the time, and there is no crown-type switch for adjusting the time. Regarding the circuit, fast forward (forward/reverse) and slow forward (
Forward/reverse) 2 to 7 circuits were configured to adjust the time.

Problems to be Solved by the Invention However, in such conventional time adjustment circuits, the crown-type switch that integrates the push-button switch has a very complicated component structure, resulting in extremely high component costs. However, there was a drawback that the cost of the entire time adjustment circuit was also high. - On the other hand, in the latter case, since the slow feed (forward/backward) is configured with a push button switch, it has the disadvantage that it is difficult to adjust the slow feed (forward/backward) compared to a crown type switch. .

Therefore, the present invention solves these conventional problems. Slow feed (forward/backward) is controlled by a crown-type switch, and rapid feed (forward) is controlled by a push-button switch, which is also inexpensive in terms of cost. This provides an excellent time adjustment circuit that is easy to adjust.

Means to Solve the Problem The time adjustment circuit for a digital watch of the present invention uses a crown type switch for slow movement (forward/reverse), and a push button type independent from the crown type switch for rapid movement (forward). Each of these is configured by a switch.

Function: The time adjustment circuit for a digital watch of the present invention uses an independent push-button switch for fast-forwarding, making it possible to attach two buttons, and the two button-type switches can be used to control fast-forward (forward) and fast-forward. It is also possible to set both forward and backward movement.

Embodiment Hereinafter, a time adjustment circuit for a digital clock according to an embodiment of the present invention will be explained with reference to the drawings.

In the figure, 1 is a digital clock circuit, and this clock circuit 1 displays the current time, alarm time, etc. on a time display 2. When setting the time on the display 2 to an arbitrary time, a control signal is input to the time adjustment input terminal 1a of the clock circuit 1. The control signal is set to the vDD level during slow forward movement and to the vs level during slow backward movement.
When the s level is input to the time adjustment input terminal 1a of the clock circuit 1, the displayed time changes by one minute. Furthermore, when an AC signal of -vDD/2 level is inputted with reference to rqvpD during forward fast-forwarding, and an AC signal of -VDD/2 level is inputted with vss as a reference during reversed fast-forwarding, the time changes in the fast-forwarding state. In this circuit, for slow feed adjustment, vDD and v
ss level respectively to the time adjustment input terminal 1a of the clock circuit 1.
For forward fast-forward adjustment, use push-button switch 4.
The AC signal set by the resistors Ra, R, . . . Ro is input to the time adjustment input terminal 19 of the clock circuit 1 for adjustment.

Effects of the Invention As described above, the time adjustment circuit of the present invention has a slow-forwarding crown-type switch and a fast-forwarding push-button switch independently configured, and each switch is connected to the time adjustment input terminal of the clock circuit, thereby reducing costs. It can be made very cheaply,
It is also extremely superior in that the arrangement of each switch can be freely determined.

5-7

[Brief explanation of the drawing]

The figure is a circuit diagram showing an embodiment of the time adjustment circuit of the present invention. 1... Clock circuit, 2... Time display, 3-... Crown type switch, 4... Push button type switch, 5
a, 6b, 5cm resistor. Name of agent: Patent attorney Toshio Nakao and 1 other person3-
crown switch

Claims (1)

[Claims] A time adjustment circuit for a digital watch, in which a reuse-type switch for time adjustment and a push-button type switch for fast-forwarding the time are configured as independent switches, and both of the switches are connected to a time adjustment input terminal of a clock circuit.