JPH044308Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] This invention relates to a notification device used in a sauna connection board and the like.

[Background technology]

As shown in Fig. 6, in the conventional notification device of this type, when a specific signal is received from the system during automatic operation, switch SW ₁ is turned on, and a signal is transmitted from power source E through normally closed contact ry ₁ of relay Ry. The alarm B, such as a buzzer, is energized, and the alarm B rings to notify that a specific signal has been input. To stop the alarm, press push button SW ₂ when you notice alarm B ringing.
This is done by turning on relay Ry and turning off normally closed contact Ry ₁ . This state is self-maintained by the normally open contact ry ₂ of the relay Ry.

After this, when the above-mentioned specific signal input disappears and the switch SW ₁ is turned off, the self-holding of the relay Ry is released and it prepares for the next signal input.

As described above, in the conventional notification device, when the user notices that the alarm B is ringing, it is necessary to operate the push button switch SW ₂ to stop the ringing of the alarm B, which is troublesome.

Another conventional notification device is as shown in FIG.
When a specific signal is received from the system during automatic operation, switch SW ₁ is turned on, power is applied to alarm B such as a buzzer from power supply E through timer contact tm, and alarm B rings at a constant loud volume. The timer TM is energized and starts operating. After a certain period of time has elapsed, the timer contact tm is turned off and the alarm B automatically stops ringing. Thereafter, when the above-mentioned specific signal input disappears and the switch _SW1 is turned off, the timer TM is reset and the timer contact tm is turned off to prepare for the next signal input.

This notification device uses the timer TM to
Since the sound of the alarm B will stop automatically, there is no need for troublesome operations to stop the sound of the alarm B.
The timer TM is often set to a relatively long setting time of 10 to 60 seconds, and it continues to beep at a high volume for a long time, alerting the user that a specific signal has been input, and then disappearing. There was a problem with giving pleasure.

[Purpose of the invention] The purpose of this invention is to be able to stop the sound of the alarm without requiring any troublesome operations, to be able to reliably notify that a specific input has been made, and to avoid discomfort. The purpose of the present invention is to provide a notification device that does not give any information.

[Disclosure of invention]

The notification device of this invention includes a switch that operates in response to a signal input, a time constant circuit that operates in response to the operation of this switch, and an impedance that changes from zero to infinity in response to changes in the output of this time constant circuit. The movable impedance element and the switch are connected in series to a power source.

According to the configuration of this invention, a time constant circuit operates in response to the operation of a switch, and a variable impedance element whose impedance changes from zero to infinity according to changes in the output of this time constant circuit is used as a power source and an alarm. When the switch is activated, the alarm starts ringing, the volume decreases over time, and the ringing finally stops.

As a result, the ringing of the alarm can be automatically stopped without requiring any troublesome operations, and the presence of a signal can be reliably notified without causing discomfort.

Embodiment A first embodiment of this invention will be described based on FIGS. 1 to 3. As shown in Figure 1, this notification device includes a switch SW ₁ that operates in response to a specific signal input, a time constant circuit CR that operates in response to the operation of this switch SW ₁ , and a time constant circuit CR that operates in response to the operation of this switch SW 1.
A variable impedance element Tr ₁ such as a transistor that changes impedance from zero to infinity in response to a change in the output of the CR, and a buzzer connected to the power supply E through the variable impedance element Tr ₁ and the switch SW ₁ in series. Alarm device BZ for circuits, etc.
It is equipped with

The time constant circuit CR consists of capacitor C ₁ and resistor R ₂
It consists of a series circuit, a transistor Tr ₂ whose impedance changes depending on the voltage of the capacitor C ₁ , and a resistor R ₁ connected in series to this transistor Tr ₂ , where the resistor R ₁ is a variable impedance element.
Connected between the base and collector of Tr ₁ .

Hereinafter, this notification device will be explained in detail with reference to FIG. 2.

In this notification device, when a specific signal is input at time to and switch SW ₁ is turned on, a voltage Vi is applied from power source E to the series circuit of notification BZ and variable impedance element Tr ₁ , and time constant circuit CR. .

As a result, capacitor C ₁ begins to charge through resistor R ₂ at time to, and capacitor C ₁
As shown in FIG. 2A, the voltage V _C1 across the line gradually increases from zero with a time constant of C ₁ ×R ₂ . As the voltage V _C1 across the capacitor C ₁ increases, the impedance of the transistor Tr ₂ gradually decreases from infinity (off), and the voltage V _R1 across the resistor R ₁ increases as shown in Figure 2B.
As shown in Figure 2C, the impedance of the variable impedance element _Tr1 gradually increases from zero (on), and the voltage across it _VEC increases as shown in Figure 2C. It will gradually increase. As a result, the voltage V _BZ shared by the alarm BZ gradually decreases from approximately the voltage Vi as shown in FIG. 2D. Therefore, the alarm BZ is
It starts ringing at maximum volume at time to, and then decreases in volume as time passes.

At time t ₁ , which is a predetermined period of time after time to (for example, 10 to 60 seconds later), when capacitor C ₁ is completely charged and the voltage V _C1 across it reaches almost voltage Vi, resistor R ₁ The voltage across V _R1 reaches almost the voltage Vi, and as a result, the impedance of the variable impedance element Tr ₁ becomes infinite (off), the voltage across it V _EC becomes almost the voltage Vi, and the shared voltage of the alarm BZ becomes V _BZ becomes almost zero, and the alarm BZ
stops ringing.

After this, there is no specific signal input and the switch is turned off.
When SW ₁ is turned off, the charge in capacitor C ₁ of time constant circuit CR is released, preparing for the next signal input.

Figure 3 shows the operating characteristics when the ringing setting time is 25 seconds, for example, and the broken line is the capacitor C ₁
The one- _dot chain line shows the shared voltage V _BZ of the alarm BZ, and the solid line shows the volume of the alarm BZ.

Note that the changes in voltages V _C1 and V _BZ are different between FIG. 2 and FIG. 3, but this is because FIG. 2 schematically shows the operation.

The notification device of this embodiment is a variable impedance element in which a time constant circuit CR is activated in response to the operation of switch _SW1 , and the impedance changes from zero to infinity in response to changes in the output of this time constant circuit CR.
Because Tr ₁ was inserted between power supply E and alarm BZ,
When the switch SW ₁ operates, the alarm BZ starts ringing, the volume decreases over time, and finally the ringing stops.

As a result, alarms can be installed without the need for troublesome operations.
The sound of the BZ can be automatically stopped, and the presence of a signal input can be reliably notified without causing discomfort.

A second embodiment of this invention will be explained based on FIG. This notification device is connected to the resistor shown in Figure 1.
A series circuit consisting of _a resistor _R3 with a small resistance value and a push button switch _SW2 is additionally connected in parallel with R2.

With this configuration, when the alarm BZ is sounding, by turning on the push button switch SW ₂ , the capacitor C ₁ is instantly fully charged and the alarm BZ is activated.
The ringing can be stopped before the set time elapses.

Note that the resistor _R3 is inserted to limit the current flowing to the push button switch _SW2 , and its resistance value is set so that the capacitor _C1 can be fully charged within 0.5 seconds.

Other configurations and effects are similar to those of the first embodiment.

A third embodiment of this invention will be explained based on FIG. This notification device connects a series circuit of _a resistor R ₃ and _a transistor Tr ₃ in parallel to _the capacitor C ₁ in FIG. It is a series circuit of resistor R ₄ and capacitor C ₂ connected.

The other configurations are the same as in FIG. 1.

In this alarm device, after the capacitor C ₁ is fully charged and the alarm BZ stops sounding, when a resounding signal is input from the terminal T, the transistor Tr ₃
is on for a predetermined time and capacitor C ₁ is connected to resistor R ₃
is discharged through the battery, and the alarm BZ sounds again.
This re-sounding will also result in the volume of the alarm BZ gradually decreasing.

In this case, the re-ringing signal causes the transistor to
The time that Tr ₃ is on is determined by the time constant of R ₄ ×C ₂ . Also, the discharge time of capacitor C ₁ determined by the time constant of C ₁ × R ₃ is determined by the time constant of transistor Tr ₃
It is necessary to set it shorter than the on time of .

According to this embodiment, the alarm BZ not only sounds in response to the main signal input, but also can be made to sound again in response to the input of the follow-up signal.

[Effect of idea]

According to the notification device of this invention, a time constant circuit is activated in response to the operation of a switch, and a variable impedance element whose impedance changes from zero to infinity according to changes in the output of this time constant circuit is used as a power source and an alarm device. Because it is inserted between the alarm and the alarm, it is possible to automatically stop the sound of the alarm without the need for troublesome operations, and it is possible to reliably notify that a signal has been input and to avoid causing discomfort. There is no.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram of the first embodiment of this invention, Fig. 2 is a timing diagram of each part thereof, Fig. 3 is a characteristic diagram showing an example of the operating characteristics, and Fig. 4 is a circuit diagram of the second embodiment of this invention. FIG. 5 is a circuit diagram of a third embodiment of this invention, and FIGS. 6 and 7 are circuit diagrams of a conventional notification device, respectively. SW ₁ ...Switch, CR...Time constant circuit, Tr ₁
...Variable impedance element, E...Power supply, BZ
...Alarm.

Claims (1)

[Scope of utility model registration request] A switch that operates in response to a signal input, a time constant circuit that operates in response to the operation of this switch, and a variable impedance element that changes impedance from zero to infinity in response to changes in the output of this time constant circuit. and an alarm connected to a power source via the variable impedance element and the switch in series.