JPH0516549Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an improvement of an alarm clock that generates an alarm sound at each set time.

[Conventional technology]

Conventionally, this type of alarm clock, for example,
There was one disclosed in Utility Model Publication No. 61-10220.

Most of the analog alarm clocks used as this type of alarm clock are generally 12-hour clocks in which the hour hand makes one revolution every 12 hours. The alarm clock is equipped with a guide mechanism for setting an alarm time and an alarm switch for controlling the operation of the alarm.When the alarm clock needs to be woken up, the alarm switch is set to the sound position, and when the alarm clock is to be stopped, the alarm switch is set to the sound position. was being operated to the stop position.

[Problem that the invention attempts to solve]

However, with the analog 12-hour alarm clock described above, when the alarm switch is set to the sound position 12 hours before the alarm time,
Also, when the alarm switch is left in the sound position, the alarm sound may be generated at an unnecessary time. Therefore, with the above-mentioned conventional alarm clock, it was necessary to set an alarm every night before going to bed.

[Means for solving problems]

This invention aims to eliminate the hassle of setting an alarm switch every night before going to bed by emitting an alarm sound at a set time every 24 hours in an analog alarm clock. It is. This invention, as a means to achieve the above object, includes a reference contact having a first contact and a second contact that switch at a set time every 24 hours, and a reference contact having a first contact on the first contact side of the reference contact. A capacitor connected to the reference contact to be charged at the time of switching and discharged at the time of switching to the second contact side, a switch means interposed in a discharge circuit of the capacitor, and a sound generating section connected to the switch means. and a ringing switch connected between both terminals of the capacitor.

[Function] The alarm clock comprising the above means functions as follows.

The sound generating section generates an alarm sound when the switch means is activated. The switching means is actuated by the discharge current of the capacitor, and furthermore, the capacitor is charged before the reference contact is switched at a set time every 24 hours, and discharged immediately after the reference contact is switched. Ru.

Therefore, the sounding section operates to sound only for the time period during which the capacitor is discharged at the set time every 24 hours.

Further, a squealing switch is connected between both terminals of the capacitor, and the discharging time of the capacitor is shortened by closing the squealing switch. That is, the operation of the sound generating section can be stopped early by the sound stop switch.

〔Example〕

FIG. 1 is an electrical circuit diagram showing a preferred embodiment of the alarm clock according to this invention.

The alarm clock of this embodiment is a 24-hour clock in which the hour hand makes one revolution every 24 hours.

In FIG. 1, reference numeral 1 indicates that the movable contact piece 1a is connected to the first fixed contact 1 every time a set time is reached every 24 hours.
This is a reference contact having a structure that switches from the b side to the second fixed contact 1c side.

In addition, 2 is charged when the movable contact piece 1a of the reference contact 1 is switched to the first fixed contact 1b side, and when the movable contact piece 1a is switched to the second fixed contact 1c side, a switch described later is activated. This is a capacitor that discharges via means 3.

Further, reference numeral 3 denotes a switch means which is interposed in the discharge circuit of the capacitor 2 and is operated by the discharge current of the capacitor 2.

The switch means 3 is a circuit connected by a transistor 31, a relay coil 32, a relay contact 33, and a resistor 34. The emitter of the transistor 31 is connected to the negative electrode 2a of the capacitor 2, and the collector is connected to the relay coil 32. The base is connected to the second fixed contact 1c of the reference contact 1 via a resistor 34, and the movable contact 33a of the relay contact 33 is connected to the first fixed contact 1b of the reference contact 1, which will be described later. 4, and the fixed contact 33b is connected to the first fixed contact 1b of the reference contact 1 and the positive electrode 9a of the dry battery 9, respectively.

Reference numeral 4 denotes a sounding section which is activated to make a sound by a pulse signal output from a movement 7, which will be described later, when the relay contact 33 of the switch means 3 is closed. It is connected and configured by.

Further, 5 is a stop switch that short-circuits both terminals of the capacitor 2 and rapidly discharges the capacitor 2 when operated, the first contact 5a is connected to the negative electrode 2a of the capacitor 2, and the second contact is 5b is connected to the positive electrode 2b of the capacitor 2 and the movable contact piece 1a of the reference contact 1 via a resistor 8.

Reference numeral 6 denotes an alarm switch that sets the alarm operation of the sounding section 4 by bringing the movable contact piece 6a into contact with the fixed contact 6b.
a is connected to the emitter of the transistor 31 of the switching means 3, and the fixed contact 6b is connected to the negative electrode 9b of the dry battery 9.

Reference numeral 7 denotes a movement that divides the vibration frequency of the quartz 71 with a watch IC 72 and outputs a pulse signal to the step motor 73 that rotates the gears of the watch and to the sound generating unit 4. Note that 74 is a trimmer capacitor for adjusting the vibration frequency of the quartz 71.

Next, the operation will be explained.

First, when the alarm switch 6 is turned on and the movable contact piece 1a of the reference contact 1 is in contact with the first fixed contact 1b, the capacitor 2 is charged via the reference contact 1 and the alarm switch 6.

Next, when the time reaches the alarm setting time and the movable contact piece 1a of the reference contact 1 is switched into contact with the second fixed contact 1c side, the capacitor 2 is switched between the second fixed contact 1c of the reference contact 1 and the switch means 3. It is discharged through the resistor 34 and the base and emitter of the transistor 31.

The transistor 31 is supplied with a base current for a discharge time determined by the values of the capacitor 2 and the resistor 34, passes excitation current to the relay coil 32, and turns on the relay contact 33 for about 10 seconds.

As a result, the emitter of the transistor 41 of the sound generating section 4 is connected to the dry battery 9 via the relay contact 33.
The transistor 41 operates the buzzer 42 in response to a pulse signal output from the watch IC 72. Thus, the sound generating section 4 operates to emit sound for the discharge time of the capacitor 2 every time the set time reaches the set time every 24 hours.

If you want to stop the sounding operation of the sounding section 4 midway through, turn on the sounding stop switch 5, and the capacitor 2 will be rapidly discharged via the resistor 8.
stops working.

[Effect of idea]

Since this invention has the above-described structure and function, it is possible to generate an alarm sound in an analog alarm clock at a set time every 24 hours for the duration of the discharge of the capacitor, for example, every night before going to bed. The trouble of setting an alarm switch can be eliminated, and furthermore, the alarm sounding operation can be easily stopped by rapidly discharging the capacitor using the sound stop switch, which eliminates the need for self-holding circuits, etc. It has many advantages such as not requiring any special circuit.

[Brief explanation of the drawing]

FIG. 1 is an electrical circuit diagram showing a preferred embodiment of this invention. 1...Reference contact, 2...Capacitor, 3...Switch means, 4...Sound generating section, 5...Sound stop switch, 6...Alarm switch, 7...Movement.

Claims (1)

[Scope of utility model registration request] a reference contact 1 having a first contact 1b and a second contact 1c that switch at a set time every 24 hours;
a capacitor 2 connected to the reference contact 1 to be charged during the switching time of the reference contact 1 to the first contact 1b side and discharged when switching to the second contact 1c side;
It comprises a switch means 3 interposed in the discharge circuit of the capacitor 2, a sounding section 4 connected to the switch means 3, and a sound stop switch 5 connected between both terminals of the capacitor 2. An alarm clock characterized by: