JPS5811638B2 - sound device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sounding device, for example, a sounding device that sounds for 5 seconds, pauses for 1 second, etc.
Repeating the cycle of 5 seconds of sound, 2 minutes pause, and 5 seconds of sound.
The present invention relates to a sounding device that is capable of repeating a cycle of two-minute pauses and continuously blowing, and is suitable for emitting an effective alarm sound.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In the figure, 1 and 2 are input terminals of a 12V or 24V DC power supply, and 3 is a Zener diode, which, together with a transistor 4 and a resistor 5, controls the emitter output voltage of the transistor 4 by 5.
It is intended to be approximately V.

Capacitor 6.7 is for smoothing. The first astable multivib break is composed of transistors 8.9 and its frequency corresponds to the sounding frequency G of the alarm coil 10.

That is, when the transistor 11 is on, the collector current flows through the collector resistor 12 to the base of the transistor 13.

Since transistors 14 and 13 are Darlington connected to coil 10, transistor 14 is turned on.

Further, the base of the transistor 13 is connected to the collector of one transistor 8 of the first astable multi-by-break through the diode 15, so that the transistor 8
When transistor 12 is on, the current flowing through collector resistor 12 flows through diode 15 to transistor 8, and transistor 14 is off. Conversely, when transistor 8 is off, no current flows through diode 15, so transistor 14 is on. Become.

That is, when transistor 11 is on, transistor 14
is turned on and off at the oscillation frequency of the first astable multivib break, allowing the coil 10 to generate sound.

The second astable multivibrator circuit is composed of transistors 16 and 17.

Further, the flip-flop circuit includes transistors 18 and 19.
It consists of

When the power supply voltage is applied to the single-power transistors 16 and 18 of the second astable multi-by break circuit and flip-flop circuit, both circuits are always turned on. The bases of the other transistors 17 and 19 are connected to the collectors of the transistors 22, which are turned on only at the moment when the power supply voltage is applied, through germanium diodes 20 and 21, respectively.

The trigger circuit of the flip-flop circuit is composed of silicon diodes 23, 24, 25, a resistor 26, and a capacitor 27, and the trigger to the capacitor 27 is given from the collector of one transistor 16 of the second astable multi-by-break circuit. .

The combined base resistance of one transistor 16 of the second astable multi-by-break is determined by the relationship between the resistors 29 and 30. When the transistor 28 is on, the transistor 28 is on, and when it is off, the base resistor 31 or the flip-flop Since it is connected to the collector of the first transistor 18 in the circuit, it operates in the same way as turning it on and off.

Since the base resistor 32 of the transistor 11 is connected to the collector of one transistor 16 of the second astable multi-by-break circuit, the transistor 11 operates in the same way as the transistor 16 turns on and off.

Reference numeral 33 denotes a changeover switch having fixed contacts a2, b2, C2 and a movable contact between the base of the transistor 28 and the emitters of the transistors 1 to 4; , fixed contacts al, C2t and C3 are diode 3
5 and the emitter of transistor 11, and the movable contact is connected to the emitter of transistor 4, respectively.

34 is the emitter of the transistor 4 and the transistor 1
This is a press switch that connects and separates from the first collector.

36 is a resistor provided between the diodes 35 and 15.

37, 38, 39 are the first resistors used together with the resistor 36.
Resistors 40 and 41 of the astable multi-by-break circuit are capacitors forming the circuit.

42. 43, 44, 45, 46, 47 are resistors built into the second astable multi-by-break circuit, 48, 4
9, 50, and 51 are capacitors incorporated into the same circuit.

52, 53, 54, and 55 are capacitors built into the flip-flop circuit, 56, 57, . . . 62 are resistors built into the same circuit, 63 is a resistor, 64 is a variable resistor, and 65 is a capacitor.

In the above configuration, the operation will be explained next.

Now, the movable contact of the changeover switch 33 is located at point al in the figure.

When in contact with C2, DC power input terminal 1.2
When a voltage is applied to the transistor 22, the second
One transistor 16, 18 of the astable multi-bye break circuit and flip-flop circuit turns on, and the other transistor 17, 19 turns off.

Therefore, the transistor 11 is turned on, and as described above, the output of the first astable multi-vib break circuit is supplied to the coil 10, producing an alarm sound.

The time period during which this alarm sound is generated is determined by the time constant 0.7×C49×R46 of the base of the other transistor 17 of the second astable multi-by-break circuit.

Note that C4Q indicates the value of the capacitor 49, and R46 indicates the value of the resistor 46, and the same will be described below.

After that time has elapsed, transistor 16 is turned off, transistor 17 is turned on, and no alarm sound is generated.

At this time, the state of the flip-flop circuit does not change and transistor 28 remains on.

Therefore, after the on-time of the transistor 17, the transistor 16 is turned on again and the transistor 17 is turned off.

At this time, the alarm sound is generated in the same way as above, but in addition, the trigger circuit's diode 232425, resistor 26,
The capacitor 27 acts, the state of the flip-flop circuit changes, the transistor 18 is turned off, and the transistor 19 is turned off.
is turned on, so the transistor 28 is also turned off.

At this time, the generation of the alarm sound has a time constant of 0.7 x C49 as above.
This continues for a time determined by ×R46, after which transistors 16 and 17 are inverted, with transistor 16 turned off and transistor 17 turned on.

The on-time of the transistor 17 at this time is about a time constant of 0,
7 X C50X R29.

The same applies below.

Next, when the movable contacts of the changeover switch 33 touch bl and b2, no sound is produced.

Also, the movable contact of the changeover switch 33 is 01. When contacting C2, between the emitter and base of the transistor 28,
Since it is short-circuited through switch contact C2, no matter what state the flip-flop circuit is in, transistor 2
8 is turned off, and the combined base resistance of the single-power transistor 16 of the second astable multi-by-break circuit is R29.
It does not change.

The press switch 34 is in a state where the diode 36 supplies direct current even when the movable contact of the changeover switch 33 is in any state, for example, when the contact of the switch 33 is BL or B2, so if the press switch 34 is pressed, a continuous current is supplied. Generates an alarm sound.

Tables 1 and 2 summarize the above operations including application examples.

Table 1 shows the case where the alarm sound was generated for 5 seconds, then paused for 1 second, and then sounded for another 5 seconds, and then paused for 2 minutes.

As described above, according to the sound generating device of the present invention, by controlling the first astable multi-by-break circuit by combining the second astable multi-by-break circuit and the flip-flop circuit, it is possible to draw attention to certain points. It is extremely effective and allows for highly specific pronunciation.

[Brief explanation of drawings]

The figure is an electrical circuit diagram of a sounding device in an embodiment of the present invention. 1.2...Input terminal, 10...Coil, 8,9°11.
14, 16, 17, 18, 19...transistor, 12
...Collector resistance, 15...Diode.

Claims (1)

[Claims] 1. A first astable multivibrator circuit that generates the sounding frequency of the sounding coil, a second astable multivibrator circuit that determines the on/off priority order of the two transistors, and a flip-flop. a starting circuit that changes the time constant of the base of one of the two transistors; A sound generating device comprising: a driving transistor connected to the collector of one transistor of a stable multi-by-break circuit; and a circuit connected to the coil in a Darlington manner and connecting the base of a subsequent transistor to the resistor. 2. The sound generating device according to claim 1, wherein the flip-flop circuit of the starting circuit is triggered by a trigger circuit.