JPH0443368B2 - - 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 when cooking or playing sports.

〔the purpose〕

The present invention provides a timer which repeatedly generates an alarm sound by reversing the motor and reversing the dial after the timer is turned up and setting the timer time again.

〔Example〕

In Figure 1, 1 is a dial with a 60-minute timer scale on its outer circumference. dial 1
The rotating shaft 2 has a two-stage sliding contact piece 3 as shown in Fig. 2.
is fixed thereto, 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 a motor 9, and the motor 9 rotates the dial 1 in FIG. 1 via a wheel train (not shown). 10 is a drive control circuit for the motor 9 ;
The direction and speed of rotation are controlled. 11 and 12 are counters, 13 is a comparison circuit, 1
4 is an alarm device, and 15 and 16 are gate circuits. The counter 11 constitutes a detection circuit, and the counter 12 and comparison circuit 13 constitute a control circuit. 17 is a flip-flop circuit, 18-
20 is a one shot circuit, one shot circuit 1
From 9, a pulse with a width of 10 seconds is sent to one-shot circuit 1.
A narrow pulse is generated from 8 and 20. 21,
22 is an analog switch. 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 is
When in the OFF position, switch 22 in Figure 3
is closed, and the oscillation frequency divider circuit 7 is held in a reset state. Then, turn dial 1 clockwise to set the timer time. For example, set it to 30 minutes. As a result, the switch 22 opens and the reset of the oscillation frequency divider circuit 7 is released, and one pulse is generated from the one shot circuit 18, and the counter 11 and the flip-flop circuit 17 are reset. The output of the flip-flop circuit 17 causes the drive control circuit 10 to generate a forward rotation instruction output and a drive pulse, and the output of the motor drive circuit 8 drives the motor 9 , causing the dial 1 to rotate counterclockwise. The timer starts.
On the other hand, the analog switch 21 is turned on by the output of the flip-flop circuit 17, and the drive pulse from the drive control circuit 10 is supplied to the counter 11, where it is calculated.

When the remaining time reaches 0 and the dial 1 reaches the 0 position, the tips 3a and 3b of the contact piece 3 in FIG. 2 come into contact with the contacts 4 and 6, respectively. Therefore, switch 23 in FIG. 3 is closed, one pulse is generated from one shot circuit 20, and counter 12 is reset. On the other hand, in response to the output of the gate circuit 15, a pulse with a width of 10 seconds is generated from the one-shot circuit 19, the flip-flop circuit 17 is set, and the alarm device 14 generates an alarm sound for 10 seconds. At this time, the drive control circuit 10 is held in an inoperative state by the pulse of the one-shot circuit 19,
Motor 9 is not driven. One shot circuit 19
When the above pulse from the drive control circuit 10 stops, the drive control circuit 10
operates, but at this time flip-flop circuit 1
7 is set, the drive control circuit 10 generates a reverse rotation instruction output and a fast forward drive pulse. This causes the motor 9 to reverse rotation at high speed and the dial 1 to rotate clockwise. The drive pulse is supplied to the counter 12 via an analog switch 22. When the contents of the counter 12 match the contents of the counter 11, that is, when the timer time is set to 30 minutes by the dial 1, an output is generated from the comparator circuit 13 and the flip-flop circuit 17
is reset. Therefore, the timer starts again as a 30-minute timer.

The above operation functions as a repeat timer.

If you want to stop the timer operation, press dial 1.
This returns the switch to the OFF position.

In the above embodiment, the timer time is repeatedly set using the counters 11, 12 and the comparator circuit 13, but the present invention is not limited to this. For example, an up-down counter may be used to set up and down the time according to the rotational direction of the motor. At the same time, the motor drive pulse may be used as a clock pulse, and when the content becomes 0, the timer time may be set.

〔effect〕

According to the present invention, after the timer is up, the dial is automatically reversed and the timer time is reset, so an easy-to-operate analog timer can be provided with a repeat function, allowing for repeated practice of cooking, sports, etc. It is convenient for such things. Moreover, you can check the remaining time and check the operation using the dial.

[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... Drive control circuit, 11, 12... Counter, 13... Comparison circuit, 14... Alarm device, 17... Flip-flop circuit.

Claims (1)

[Claims] 1. A motor that can rotate in forward and reverse directions, a dial that sets the timer time and is rotated by the forward rotation of the motor to indicate the remaining time, a switch that operates when the remaining time runs out, and the operation of this switch. an alarm device that generates an alarm sound by the switch; a detection circuit that detects the timer time set by the dial; a drive control circuit that operates the motor in reverse after the switch is operated; and a control circuit that stops the reverse rotation of the motor when the dial is reversed to a position corresponding to the detected timer time, and the control circuit restarts the motor from the stopped position. A timer characterized in that the timer is restarted by rotation and driving.