JPS5824232Y2 - time adjustment device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a time adjustment device with variable fast forwarding speed.

In recent years, with the development of display devices such as liquid crystals and light emitting diodes, digital display watches have been developed.

These digital display clocks have the advantage of being less likely to misread the time, but it takes time to adjust the time because it takes about 0.5 seconds to rapidly advance the hours, minutes, seconds, etc. There were some operational difficulties, such as pressing a push button the required number of times and other operations required to fast forward.

An object of the present invention is to provide a simple time adjustment device that eliminates the complexity of the above-mentioned adjustment method and does not take much time.

The operation of the present invention will be explained below with reference to the drawings.

FIG. 1 is a diagram showing an embodiment of a time adjustment device comprising a correction switch, a time discrimination circuit, and a selection circuit according to the present invention.

FIG. 2 is an external view of the timepiece according to the present invention.

FIG. 3 shows a structural diagram of a switch integrated with a variable resistor or variable capacitor (trimmer capacitor) that can provide a fixed period of time from external push to fast forward.

1 is an oscillation circuit, 2 is a frequency divider circuit, 3 is a decoder circuit, 4
5 is a drive circuit, and 5 is a display device.

A typical digital clock is constructed from these circuits.

The way to adjust these digital clocks is to use switches to set functions such as hours, minutes, and seconds (not shown in this diagram).
A method is adopted in which the chattering prevention circuit 11 is linked to the correction switch 12 to send one step each time the correction switch 12 is pressed or to send a step approximately every 1/2 second while the correction switch 12 is pressed.

Further, the correction is made by setting the function switch to fast forward and operating the correction switch 12.

In the present invention, when the correction switch is pressed to turn on, the signal passes through the chattering prevention circuit 11 and enters the time discrimination circuit 7 and selection circuit 6.

The time discrimination circuit 7 is composed of a one-shot multi-circuit consisting of two inverters, a resistor 9, and a capacitor 10, but any circuit may be used as long as it can extract a signal after a certain period of time with respect to the input signal. .

For example, it can be replaced with a counter, delay circuit, etc.

The selection circuit 6 is a circuit that selectively supplies the fast-forwarding signal from the frequency dividing circuit 2 to the decoder circuit 3 after a certain period of time while the push button switch is pressed.

More specifically, the signal that has passed through the chattering prevention circuit enters the AND gate 14 and OR gate 15 of the time discrimination circuit 7 and the selection circuit 6.

Immediately after pressing the push button, a signal from the time discrimination circuit 7 is sent to the NOR gate 13.

At this time, the fast-forward signal from the frequency dividing circuit 2 does not pass through, but only the signal generated by pressing the push button passes through the OR gate 15, and only one step is corrected.

When the button is pressed further and the time constant of the time discrimination circuit 7 has elapsed, the signal to the NOR gate 13 disappears, and the fast-forward signal from the frequency dividing circuit 2 passes through the NOR gate 13 and enters the AND gate 14.

At this time, the switch 12 is kept pressed, so the other gate is in the ON state.

The fast-forward signal from the frequency divider circuit 2 passes through an AND gate 14, further passes through an OR gate 15, and enters the decoder circuit 3, where it can be modified by fast-forwarding.

The fixed period from one-step correction to fast-forwarding is determined by the time constant of time discrimination circuit 7, and is given by the product of resistance 9 and capacitance 10 in the case of a one-shot multi-circuit.

In the present invention, it is desirable to set the time from about 1 second to about 1.5 seconds.

The fast forwarding speed can be selected from the frequency dividing stage of the frequency dividing circuit, and is preferably 1/8 to 1/16 seconds.

Furthermore, depending on your preference, you can externally adjust the fixed period of time between one-step correction and fast-forwarding.

FIG. 3 shows an embodiment of the present invention, which is a structural diagram of the external adjustment switch for a certain period of time before fast-forwarding.

19 is a main shaft of a rotatable push button switch.

It is attached to the front end of the main shaft 19 of the pushbutton switch via a variable resistor 25 attached to a circuit board 26 and a rotation transmission section 24.

It is also possible to replace it with a variable resistance capacitor.

The watch case 20 and the pin electrode 22 are electrically connected and also serve as a pin for pushing the main shaft 19 of the push button switch upward.

Electrical connection for one-step correction when the pushbutton is pressed is obtained by contact between the pin electrode 22 and the opposing switch pin electrode 23 by pressing the main shaft 19 of the pushbutton switch.

Further, by rotating the main shaft 19 of the pushbutton switch, the resistance value of the variable resistor 26 is changed, and the fixed period from one-step correction to fast forwarding can be adjusted according to each individual's preference.

As described above, according to the present invention, one-step correction and further fast-forwarding can be performed simply by pressing the push button switch, so it is possible to provide a simple and time-saving time adjustment device.

In addition, you can externally adjust the fixed period from one-step correction to fast-forwarding according to your preference.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing an embodiment of a time adjustment device comprising a correction switch, a time discrimination circuit, and a selection circuit according to the present invention, Fig. 2 is an external view of a timepiece equipped with a correction device according to the invention, and Fig. 3 is a structural diagram of a pushbutton switch and a variable resistor that can externally adjust the fixed period from when the pushbutton is pressed until fast forwarding. 1... Oscillation circuit, 2... Frequency dividing circuit, 3
...Decoder circuit, 4...Drive circuit,
5... Display device, 6... Selection circuit, 7
...Time discrimination circuit, 9...Resistance, 10
... Capacity, 11 ... Chattering prevention circuit, 12 ... Push button switch, 13 ...
...NOR gate, 14...AND gate, 15...OR gate, 16...push button, 17...digital display section, 18. 20
......Case, 19...Push button switch main shaft, 22.23...Pin electrode, 24...
...Rotation transmission section, 25...Variable resistance, 26
・・・・・・Circuit board.

Claims (1)

[Scope of utility model registration request] In a time adjustment device comprising a correction switch and a time discrimination circuit and a selection circuit comprising a one-shot multi-circuit, when the correction switch is turned on, one-step forwarding is started, and when the correction switch is kept on for a certain period of time thereafter, fast forwarding is started to be corrected,
an element that determines a time constant of the one-shot multi-circuit is a variable element, and the variable element is connected to the correction switch;
A time correction switch characterized in that a fixed period from turning on the correction switch to fast forwarding can be adjusted by external operation of the correction switch.