JPH0443836Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an alarm clock that generates an alarm by the sound of a striking bell, and particularly relates to an alarm stop device thereof.

(Prior Art) Alarm clocks have conventionally been provided with a stop switch for stopping alarm notification.

This stop switch is generally located at a location where it can be easily operated. However, the provision of such a switch significantly restricts the design of the watch, and also invites erroneous operation. Furthermore, the operation is cumbersome, and many users desire improved operability.

Therefore, Utility Model Application Publication No. 61-28097 and Utility Model Application No. 61-28097
Like the clock shown in Publication No. 53-115069,
A watch has been proposed in which a vibration detecting element is provided in the watch body, and when the vibration detecting element detects vibration, that is, when the user taps the watch, the alarm notification is stopped.

With this configuration, there is no need to provide an external switch, and operability can be improved.

(Problems to be solved by the invention) The vibration detection element in the above-mentioned conventional technology has many malfunctions, such as stopping the alarm if any vibration is applied to the watch while notifying the alarm. Another problem was that it could not be used for watches that vibrated when the notification sound was generated.

(Means for Solving Problems) The purpose of the present invention is to provide an alarm stop device that improves operational reliability, improves operability, and can be applied to watches that use a striking bell sound. The objective is to provide an alarm clock with the following features.

In order to solve the above-mentioned problems and achieve the purpose, the alarm clock of the present invention is designed such that when the alarm notification by the sound of a bell is started, the notification is made by, for example, suppressing the vibrating ring for striking the bell. It is configured to stop.

In order to stop the notification in this way, in the present invention, a piezoelectric element for vibration detection is installed inside the ring.
Furthermore, a vibration suppression detection circuit that detects when the vibration of phosphorus falls below a certain level from the electromotive force generated in this piezoelectric element, and a gate circuit that outputs the detection signal as a ringing stop signal only when an alarm is notified are provided. It is characterized by

(Example) An example of the present invention will be described below based on the drawings.

Fig. 2 is a plan view of an alarm clock according to an embodiment of the present invention, Fig. 3 is a bottom view of the alarm clock shown in Fig. 2, Fig. 4 is a sectional view taken along line A-A in Fig. 3, and Fig. 5. is a cross-sectional view taken along the line BB in FIG. 3, and FIG. 6 is a diagram showing the bell striking device in this embodiment.

The watch case 2 in this embodiment includes a hemispherical ring 4 and a base 6 that supports the ring 4.

A piezoelectric element 8 is attached to the inner surface of the ring 4, which generates an electromotive force by its vibration.

In addition, the base part 6 includes a clock circuit, a display part 10 that can be seen from the bottom side, and a time correction switch 12.
, alarm set switch 14 , and bell striking device 1
6 etc. is attached.

This bell striking device 16, as shown in FIG.
It is composed of a motor 18, a cam 20 attached to the rotating shaft of the motor 18, and a shaft 24 having one end attached to the cam 20 via a spring 22 and a hitting ball 26 attached to the other end. . According to this bell striking device 16, when the motor 18 rotates, the bell striking device 16 strikes the bell 2 via the cam 20 and the spring 22.
4 swings, and the striking ball 26 at its end intermittently contacts the ring 4, producing a striking sound.

In this embodiment, when the alarm time comes,
The bell striking device 16 is driven to generate a striking sound, and the vibration of the ring 4 at this time causes the piezoelectric element 8 to output an electromotive force. Thereafter, when the user touches the ring 4 to suppress its vibration, the output voltage of the piezoelectric element 8 decreases, and this is detected to stop the alarm notification.

Next, the circuit configuration of the alarm clock in this embodiment will be explained based on FIG.

30 is a reference signal generation circuit, and 32 is a frequency division circuit that divides the frequency of the reference signal from this reference signal generation circuit 30. 34 is a time display section that displays the time based on the output signal from the frequency dividing circuit 32;
2, a decoder driver 38 that converts the output signal into a display drive signal, and a display section 40 that is driven by the display drive signal.

42 is an alarm circuit that detects a set alarm time and outputs a coincidence signal for a certain period of time.

This alarm circuit 42 includes an alarm memory 44 that stores the set alarm time, and a clock circuit 3.
A matching circuit 46 that inputs signals from the alarm memory 44 and 6 and outputs a signal when they match, a one-shot multivibrator 48 that outputs a pulse when the output signal is input, an alarm set switch 56, and a counter and AND circuit that will be described later. An OR gate 50 which inputs a signal from the gate, and a flip-flop 52 which inputs a signal from the one-shot multivibrator 48 and a signal from the OR gate 50 to a set input S and a reset input R, respectively.
and a counter 54 which inputs the signal from the output to the reset input R and inputs the clock signal φ ₁ from the frequency divider circuit 32 to the clock input φ to apply the signal to the OR gate 50.

Reference numeral 58 denotes a drive circuit for driving the bell-striking motor 60, which inputs the signal from the output Q of the flip-flop 52 to the base via the resistor 62, one terminal of the motor 60 is connected to the collector, and the emitter is grounded. It is composed of a transistor 64.

66 is a vibration suppression detection circuit that outputs a detection signal when the electromotive force of the piezoelectric element 68 becomes below a certain level. This vibration suppression detection circuit 66 includes a piezoelectric element 6
Diode 70 rectifying the electromotive force signal from 8
, a Zener diode 72 that makes the voltage of the signal constant, a capacitor 74 and a resistor 76 that integrate the constant voltage signal, resistors 78 and 80 that obtain a constant reference voltage, and a Zener diode 72 that makes the voltage of the signal constant. A comparator 82 that inputs the (+) input and the electromotive force signal from the piezoelectric element 68 to the (-) input.
It is composed of.

84 is the output signal of this comparator 82 and the flip-flop 52 in the alarm circuit 42 mentioned above.
This is an AND gate that receives a signal from the output Q of the AND gate and applies the signal to the OR gate 50.

Next, the operation of the alarm clock having the above configuration will be explained.

When the set alarm time arrives, the contents stored in the alarm memory 44 and the count contents of the timer circuit 36 match, and the coincidence circuit 46 detecting this matches its output signal to the H level. One-shot multivibrator 48 to which this H level signal is input
outputs a pulse in response to this input signal.

This pulse is applied to the set input S of flip-flop 52, placing it in the set state.

Therefore, the output Q of the flip-flop 52,
become H and L levels, respectively, and the transistor 64, which inputs the signal from the output Q to its base via the resistor 62, becomes conductive. This transistor 6
4 becomes conductive, the motor 60 operates, thereby producing a striking sound.

When the ringing sound is generated in this manner, the ring 4 (see FIG. 1, etc.) vibrates, and this vibration causes the piezoelectric element 68 to immediately generate an electromotive force. Therefore, in the input voltage of the comparator 82, the potential on the (-) input side is higher than the reference voltage on the (+) input side due to the electromotive force from the piezoelectric element 68, and its output signal becomes L level.

Therefore, as described above, even if the signal from the output Q of the flip-flop 52 in the alarm circuit 42 goes to H level, the output signal from the comparator 82 in the vibration suppression detection circuit 66 goes to L level at the same time. The output signal of AND gate 84 is kept at L level, and flip-flop 52 is not reset by the signal from AND gate 84.

After that, when the user suppresses the phosphor 4, the vibration of the phosphor 4 weakens, and the voltage of the electromotive force output by the piezoelectric element 68 also decreases. As a result, the reference voltage on the (+) input side of the comparator 82 becomes higher than the voltage on the (-) input side, and its output signal becomes H level. At this time, the AND gate 84 is in an open state due to the signal from the output Q of the flip-flop 52, so the output signal of the comparator 82 is generated in the output signal of the AND gate 84.

This signal is applied via OR gate 50 to the reset input R of flip-flop 52 to reset it.

When the flip-flop 52 is reset in this way, the signal from its output Q becomes L level, and the transistor 6 input to the base receives this signal.
4 becomes non-conductive. Therefore, the motor 60 stops and the alarm notification stops.

Furthermore, even if the alarm set switch 56 is turned on during alarm notification, the flip-flop 5
2 can be reset to stop the alarm notification, and the flip-flop can also be reset when the flip-flop 52 is reset and starts counting when the counter 54 counts for a certain period of time and outputs a pulse from its output C. 52 is reset and the alarm notification is stopped.

(Effects of the invention) According to the invention, alarm notification can be stopped by simply holding down the ring, that is, the watch case, and operability can be improved.

Furthermore, it can be used for clocks that vibrate, such as alarm clocks that use a ringing sound, and the range of application can be expanded.

Furthermore, suppressing the watch to weaken its vibrations hardly occurs unless the user is consciously doing so, compared to adding vibration to the watch as in the prior art. In other words, although watches are often dropped, hit, or knocked over,
It is extremely rare for a clock to be held down, and therefore malfunctions due to external factors are rare.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing the circuit configuration of an alarm clock according to an embodiment of the present invention. FIG. 2 is a plan view of an alarm clock according to an embodiment of the present invention. Figure 3 is the second
FIG. 2 is a bottom view of the alarm clock shown in the figure. FIG. 4 is a sectional view taken along the line AA in FIG. 3. FIG. 5 is a sectional view taken along line BB in FIG. 3. FIG. 6 is a plan view showing only the bell striking device shown in FIGS. 4 and 5. FIG. 2...Watch case, 4...Rin, 6...Base,
8, 68... piezoelectric element, 10, 40... display section,
18, 60...motor, 24...shuttle, 30
...Reference signal generator, 32... Frequency dividing circuit, 34...
...Time display section, 42...Alarm circuit, 58...
Drive circuit, 66... Vibration suppression detection circuit, 84...
gate circuit.

Claims (1)

[Claims for Utility Model Registration] A reference signal generation circuit, a frequency division circuit that divides the frequency of the reference signal from the reference signal generation circuit, and a time display section that displays the time based on the output signal from the frequency division circuit; an alarm circuit that detects a set alarm time and outputs a coincidence signal for a certain period of time; a bell-striking motor; and a drive circuit that rotates the bell-striking motor in response to the coincidence signal from the alarm circuit. , an alarm clock comprising a ring that is oscillated by the rotation of the bell-striking motor, and a ring that is struck by the ring, the ring being attached inside the ring and generating an electromotive force by the vibration of the ring a vibration suppression detection circuit that outputs a detection signal when the electromotive force of the piezoelectric element is below a certain level; and a vibration suppression detection circuit that outputs a detection signal only when a matching signal from the alarm circuit is generated. a gate circuit that outputs a detection signal from the alarm circuit as a signal for stopping the coincidence signal from the alarm circuit.