JPH0124336B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an analog timer having a repeating timer function.

[Prior art and its problems]

Conventional analog timers with dials do not require complicated operations, so they have the advantage of being easy for anyone to use. However, since it does not have a repeat timer function, it is inconvenient when it is desired to repeatedly generate an alarm sound at regular intervals, such as during cooking or sports.

[Objective] The present invention provides a timer in which a timer time set by a dial is measured by a clock circuit, and an alarm sound is repeatedly generated at each measured time.

〔Example〕

In Fig. 1, 1 is a dial, and 2 has a 60-minute timer scale on its outer periphery. As shown in FIG. 2, a two-pronged sliding contact piece 3 is fixed to the rotating shaft 2 of the dial 1, and a common contact 4 connected to Vss is formed on the rotation locus of its tip 3a.
Further, a reset contact 5 and an alarm contact 6 are formed on the rotation locus of the other tip 3b. When the dial 1 is in the OFF position as shown in Fig. 1, the tips 3a and 3b are in contact with the contacts 4 and 5, respectively, and when the remaining time reaches 0, the tips 3a and 3b are in contact with the contacts 4 and 6, respectively. It is structured as follows.

In FIG. 3, 7 is an oscillation frequency dividing circuit, 8 is a drive circuit for motor 9 , and motor 9 is a wheel train (not shown).
The dial 1 shown in FIG. 1 is rotated counterclockwise through the dial 1. 10 and 11 are counters, 12
13 is a comparison circuit, 13 is an alarm device, and 14 to 16 are gate circuits. 17 to 19 are one-shot circuits, 20 and 21 are analog switches, and the outputs of the gate circuit 14 are "0" and "1", respectively.
It is turned on when , and allows the clock pulse from the oscillation circuit 7 to pass through. 22 is a switch consisting of the contact piece 3 and contacts 4 and 5 shown in FIG. 2, 23
is a switch consisting of a contact piece 3 and contacts 4 and 6.

Next, the operation will be explained. Dial 1
When in the OFF position, switch 22 in Figure 3
is closed, and the oscillation frequency dividing circuit 7, motor drive circuit 8, and counters 10 and 11 are reset.
Then, turn dial 1 clockwise to set the timer time. For example, set it to 30 minutes. This opens the switch 22, canceling the reset of the circuit, and driving the motor 9 to operate the timer. On the other hand, since the output of the gate circuit 14 becomes "0" due to the above-mentioned opening of the switch 22, the analog switch 20 is turned on, and a pulse of a certain period, for example, a pulse of one minute period, from the oscillation frequency dividing circuit 7 is output to the counter. 10 and is timed.

When the remaining time reaches 0 and the dial 1 reaches the 0 position (at this time, the counter 10 is counting 30 minutes), the tips 3a and 3b of the contact piece 3 shown in FIG. Contact 6. Therefore, the switch 23 shown in FIG. 3 is closed, and the pulse from the one shot circuit 17 generates a pulse having a width of, for example, 10 seconds from the one shot circuit 19, and an alarm sound is generated. Further, the motor drive circuit 8 is reset by the output of the gate circuit 14, and the motor 9 is stopped.
On the other hand, since the analog switch 21 is turned on, the pulse of one minute period from the oscillation divider circuit 7 is output to the counter 1.
1, and timing starts. When 30 minutes have passed, the contents of the counter 10 match, and the comparison circuit 12
The counter 11 is reset by the pulse from the one-shot circuit 18, and the alarm sound is sounded for 10 seconds by the pulse from the one-shot circuit 19. The counter 11 starts counting again, and the same operation as above is repeated, functioning as a repeat timer.

If you want to stop the timer operation, turn dial 1.
Return to OFF position. As a result, the tips 3a and 3b of the contact piece 3 shown in FIG. 2 come into contact with the contacts 4 and 5, respectively, and the switch 22 shown in FIG. 3 closes to return to its initial state.

Note that a presettable down counter may be used as the counter 11, and the contents of the counter 10 may be preset and counted down at the start of the repeat timer operation, and an alarm sound may be generated when the contents reach 0. In this case, the remaining time may be displayed by digitally displaying the contents of the down counter.

Further, during the repeat timer operation, the operation may be displayed by blinking a light emitting diode or emitting a sound at regular intervals.

〔effect〕

According to the present invention, it is possible to provide a repeating timer function with a dial-type timer that is easy to operate.
Convenient for cooking, sports practice, etc. Moreover, the mechanical structure and operation are completely conventional, and the cost is low and anyone can easily use it.

[Brief explanation of drawings]

Fig. 1 is a front view showing an embodiment of the present invention, Fig. 2 is a front view showing the timer contacts and contacts shown in Fig. 1 extracted, and Fig. 3 is an example of the circuit configuration. It is a logic circuit diagram. 1... Dial, 3... Contact piece, 4, 5... Contact, 10, 11... Counter, 12... Comparison circuit, 13... Alarm device.

Claims (1)

[Claims] 1. A dial that sets the timer time and is rotated by the operation of a motor to indicate the remaining time, a switch that operates when the remaining time runs out, and an alarm sound that is generated by the operation of this switch. an alarm device that generates an alarm, a clock circuit that measures the time from the timer time setting using the dial to when the switch operates; and a control circuit that operates the alarm device to generate an alarm sound every time the specified time elapses.