JPH0445077B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a timer for writing instruments such as sharp pencils and ballpoint pens.

[Prior art and its problems]

Conventional timers are used in kitchens, etc., published in 1983
A square case with a circular dial, as shown in Japanese Patent No. 56774, is common. Although this has the advantage of being easy to use, it is not suitable for portable use.

〔the purpose〕

The present invention is convenient to carry, easy to operate, and prevents wasteful power consumption. The present invention provides a knock-type writing instrument type timer.

〔Example〕

In FIG. 1, reference numeral 1 denotes a copper part shaped like a writing instrument, such as a sharp pencil or a ballpoint pen, which houses a battery 2, a printed circuit board 3, and a sounding device 4. The sounding device 4 is an electromagnetic buzzer, and has a coil 6 wound around an alarm stem 5, and a plastic magnet 7 is provided around the coil 6, which is press-fitted and fixed in the copper part 1. plastic magnet 7
is made to protrude from the alarm stem 5, and a notch 7a is provided there, and the printed circuit board 3 is sandwiched and fixed therein. Reference numeral 8 denotes a knob member, which is pulled downward in the figure by springs 9, 9, one end of which is fixed to the body 1. The knock member 8 is provided with a sound output port 10, so that the alarm sound from the sound generating device 4 can efficiently escape to the outside. Reference numeral 11 denotes a conductive member fixed to one end of the knob member 8, and conduction is established between the contact pieces 12, 12 by the knob operation of the knob member 8.

Reference numeral 13 denotes a latch, which is used to attach it to a pocket of clothing or the like. Although not shown, a part of the body 1 is provided with a timer time display section.

In FIG. 2, 14 is an oscillator, and 15 is a frequency divider, whose output terminals P _{1 and} P ₂ generate pulses with a period of 1 second and a period of 1 minute, respectively. Reference numeral 16 denotes an up-down counter, and a timer time is set by operating the knob member 8.
17 is a timer time display, 18 and 19 are counters for 4 seconds and 30 seconds, respectively.The counter 18 determines whether the operation interval of the knob member 8 is more than or less than 4 seconds, This is to reset the timer time again when operated. The counter 19 is for determining the duration of the alarm sound. 20, 21, 22 are flip-flop circuits, 23 to 33 are gate circuits, 3
4 and 35 are inverters; 36, 37, and 38 are differentiating circuits; 39 is an analog switch serving as a third control device means; 40 is a delay circuit; and 41 is a one-shot circuit that generates a one-second pulse. 42 is a switch, which includes the conductive member 11 and the contact piece 12 shown in FIG.
It consists of 12.

The gate circuit 23 and delay circuit 40 constitute a first control circuit, and the flip-flop circuit 22 and gate circuits 24, 28, and 30 constitute a second control circuit.

Next, the operation will be explained. In the initial state, flip-flop circuits 20 and 21 are assumed to be reset and set, respectively. Therefore, the timer time is set by operating the knob member 8, and in this example, one minute is set by one operation of the knob. When the switch 42 is closed by the first click operation, the flip-flop circuit 20 is set and the analog switch 39 is turned on, power is supplied to the oscillator 14 and the divider 15, and the operation starts. On the other hand, the output of the gate circuit 24 becomes "1" and the flip-flop circuit 21 is reset, one pulse is generated from the differentiating circuit 36 and the up-down counter 16 is reset. The resetting of the flip-flop circuit 21 generates one pulse from the gate circuit 23, and the frequency divider 15, counters 18, 19 and flip-flop circuit 22 are reset to perform an initial reset. Further, a pulse is generated from the delay circuit 40 with a slight delay, and the up-down counter 16 is set to "1".

Thereafter, by repeating the knock operation, the up-down counter 16 is incremented one by one, and the timer time is set. Incidentally, since the flip-flop circuit 21 has already been reset by the first knock operation, no pulse is generated from the differentiating circuit 36 by the second and subsequent knock operations.

On the other hand, the counter 18 is reset every time the button is operated, and counts 1 second signals. Therefore, if no knock operation is performed for 4 seconds or more, an output is generated and the flip-flop circuit 21 is set. Therefore, if a setting error is made, the up-down counter 16 is reset to its initial state by performing the knock operation after a period of 4 seconds or more, and can be reset from the beginning.

When the timer time is set in this way, a one-minute period pulse is supplied from the frequency divider 15 to the down input of the up-down counter 16, and the timer time is counted.

When the remaining time reaches 0, an output is generated from the up-down counter 16, one pulse is generated from the differentiating circuit 34, and the flip-flop circuit 22 is set. This opens the gate circuit 30, and the sound generating device 4 generates an alarm sound.

To stop the ringing, etc., the knocking member 8 only needs to be clicked once. As a result, a pulse is generated from the gate circuit 24, the flip-flop circuit 22 is reset, and the alarm sound stops. At this time, the output of the gate circuit 31 is "1" and the gate circuit 32 is open, so the gate circuit 24 is
A pulse from the gate is supplied to the one shot circuit 41, a pulse with a width of 1 second is generated, and the gate circuit 33 is closed. Therefore, the flip-flop circuit 21 is not reset by the above-mentioned pulse from the gate circuit 24, and the above-mentioned timer time setting operation is not performed, but only the above-mentioned ringing stopping operation is performed.

In addition, if the above-mentioned ring stop operation is not performed, when the counter 19 counts 30 seconds due to the 1 second cycle pulse from the gate circuit 26, the gate circuit 30 is closed by the output and the automatic ring stop is performed. It is done.

In the above embodiment, one minute is set by one click operation, but the time is not limited to this and can be arbitrarily set by selecting the period of the clock pulse to the up-down counter 16.

〔effect〕

According to the present invention, since it is in the form of a writing instrument, it can be carried by inserting it into a chest pocket, etc., and since the knob member is used to both set the timer time and stop the alarm sound, there is no need to operate the alarm sound to stop it. No members are required, and the configuration and operation can be simplified. Further, when the alarm sound is stopped, the power supply to the reference signal generation circuit is cut off, so that unnecessary power consumption can be prevented.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a logic circuit diagram showing an example of a circuit configuration. DESCRIPTION OF SYMBOLS 1...Body part, 4...Sounding device, 8...Knob member, 11...Conductive member, 12...Touch piece, 16...
Up-down counter, 22...flip-flop circuit, 39...analog switch, 42...switch.

Claims (1)

[Claims] 1. A reference signal generation circuit consisting of an oscillator and a frequency divider, a copper part shaped like a writing instrument such as a sharp pencil,
A knob member provided at one end of the copper part, a switch operated by operating the knob member, and a timer circuit that counts the reference signal from the reference signal generation circuit and produces an output after counting the desired timer time. , an alarm device that generates an alarm sound in response to an output from the timer circuit, and a first control circuit that sets a timer time in the timer circuit when the knob member is operated while the alarm sound is not generated. a second control circuit that stops the alarm sound when the knock member is operated while the alarm sound is being generated; and a reference signal generation circuit that stops the alarm sound when the second control circuit stops the alarm sound. A knock-type writing instrument type timer, characterized in that it comprises a third control circuit that cuts off power supply to the timer.