JP2024047619A - Transmitters and fire alarm systems - Google Patents

Abstract

[Problem] To provide a transmitter and a fire alarm system that can easily identify a transmitter whose push button has been pressed. [Solution] In a fire alarm system having at least a transmitter 10, an emergency bell 30, and a receiver 20 that rings the emergency bell when the transmitter detects that the push button switch has been pressed or receives a signal indicating that the push button switch has been pressed, the transmitter comprises an audio output unit 17, a memory unit 19 that stores multiple pieces of audio data output from the audio output unit, a signal input/output unit 11 that is connected to wiring laid between the receiver and the transmitter, and a control unit 18. The control unit outputs an audio based on first audio data from the audio output unit while the push button is not pressed and the receiver is ringing the emergency bell, and outputs an audio based on second audio data from the audio output unit while the receiver is ringing the emergency bell in response to pressing of the push button. [Selected Figure] Figure 2

Description

The present invention relates to an emergency alarm transmitter and a fire alarm system, and in particular to a technology that makes it possible to easily identify the transmitter that has been operated when a push button is pressed by mistake or in tampering with a transmitter that constitutes a P-type fire alarm system.

A fire alarm system is installed inside buildings to notify people of the outbreak of a fire. The fire alarm system is composed of a manual fire alarm transmitter equipped with a fire detector and a push-button switch, a fire receiver that receives signals from the transmitter, a fire alarm bell, and an indicator light that indicates the location of the transmitter. Of these, the fire alarm transmitter is installed at an appropriate height on the wall of a building's corridor or other area. When a fire breaks out, the discoverer presses the push button on the fire alarm transmitter hard, which turns on the built-in switch and transmits a signal to the fire receiver, and also sounds an alarm from a bell installed near the transmitter, alerting people in the vicinity to the fire.

Note that P-type fire alarm systems are designed to detect a fire for each sensor line installed in each of a number of divided areas, such as the floors of a building, and the fire receiver (hereinafter simply referred to as the receiver) cannot obtain information identifying which of the multiple sensors in an area has detected a fire. Similarly, in a P-type fire alarm system, if multiple transmitters are connected to the same sensor line, it is not possible to identify the transmitter whose push button has been pressed.

Incidentally, in fire alarm systems installed in public facilities and schools where a large number of people enter and exit, there is a possibility that the push button on the alarm transmitter may be pressed by mischief or negligence, resulting in a non-fire report (false alarm).
Therefore, an invention has been proposed for a P-type fire alarm system that varies the current flowing through the lines depending on the number of fire detectors that have triggered an alarm for each sensor line and whether or not the transmitter has been operated, and that introduces a mechanism and timer to determine the amount of current, so that even if the transmitter push button is pressed by mistake, a sound alerting the user of a fire is not immediately output, thereby making it possible to alert the user according to the situation (Patent Document 1).

Japanese Patent Application Laid-Open No. 11-185189

In the fire alarm system described in Patent Document 1, although it is possible to determine that the push button of a transmitter has been pressed by mistake, if multiple transmitters are connected to the same line, it is difficult to determine which push button of the transmitter has been pressed. In addition, in order to perform recovery work to return the system to normal, a disaster prevention officer must actually go to the location of the transmitter in the area where the alarm was issued to check and contact an administrator waiting at a disaster prevention center where a receiver is located. However, if there are multiple transmitters in the same area, it is not possible to determine which transmitter's push button has been pressed, and it takes time to operate the sound stop button on the receiver to stop the sound output device from ringing.
Furthermore, because conventional transmitters do not have an alarm function, unless one is familiar with the structure of the monitored area and the location of disaster prevention equipment, it is difficult to locate the transmitter, and in the event of vandalism or mistaken operation, it takes a long time to operate the receiver's recovery button to return it to normal.

The present invention has been made in response to the above-mentioned problems, and its object is to provide a transmitter that makes it easy to identify the transmitter whose push button has been pressed when multiple sound output devices are installed in an area where visibility is not sufficient due to the structure.
Another object of the present invention is to provide a fire alarm system which can be quickly returned to its normal state even if the push button of the transmitter is pressed by mischief or erroneous operation.

In order to solve the above problems, the present invention provides
A transmitter constituting a fire alarm system including at least a transmitter having a push button and a switch that is turned on and off by pressing the push button, a local sounding device, and a receiver that activates the local sounding device when it detects that the push button has been pressed or receives a signal indicating that the push button has been pressed from the transmitter,
An audio output unit;
an acoustic data storage unit that stores a plurality of pieces of acoustic data outputted from the acoustic output unit;
A signal input/output unit connected to a wiring laid between the receiver and the transmitter;
A control unit and
The control unit is configured to output a sound based on first sound data from the sound output unit while the push button is not pressed and the receiver is sounding the local sound device, and to output a sound based on second sound data from the sound output unit while the receiver is sounding the local sound device in response to pressing of the push button.

With the above configuration, when the push button of any of the transmitters is operated, the transmitters whose push buttons have been operated and the transmitters whose push buttons have not been operated each emit different sounds, making it easy to identify the transmitter whose push button has been pressed. This makes it possible to find the transmitter whose push button has been pressed and quickly check whether the push button of the transmitter has been operated by mischief or erroneous operation.

Another invention of the present application is
A transmitter constituting a fire alarm system including at least a transmitter having a push button and a switch that is turned on and off by pressing the push button, a local sounding device, and a receiver that activates the local sounding device when it detects that the push button has been pressed or receives a signal indicating that the push button has been pressed from the transmitter,
An audio output unit;
an acoustic data storage unit that stores a plurality of pieces of acoustic data outputted from the acoustic output unit;
A signal input/output unit connected to a wiring laid between the receiver and the transmitter;
A control unit;
Equipped with
The control unit is configured to output a sound based on the second sound data from the sound output unit while the receiver is ringing the local sound device in response to pressing of the push button, and to output a sound based on the third sound data from the sound output unit in place of the sound based on the second sound data after the receiver stops ringing the local sound device.

With the above configuration, when the receiver stops the sound of the district sound device, the sound output by the sound output unit of the transmitter whose push button was operated switches, so even if the push button of the transmitter is pressed by mischief or mistake, the transmitter can be easily found and quickly returned to normal. Furthermore, when the discoverer of a fire operates the push button of a transmitter, the transmitter is generally considered to be near the location of the fire, so by easily identifying the transmitter whose push button was pressed, it becomes possible to quickly start initial fire extinguishing.

Here, it is preferable that the control unit is configured to output sound based on the second sound data from the sound output unit at a volume equivalent to the volume of the local sound device, and to output sound based on the third sound data from the sound output unit at a volume lower than the sound based on the second sound data.
With this configuration, it is possible to prevent the sound output device from continuing to output a loud sound indicating a fire for a long period of time.

It is also preferable that the sound based on the second sound data be a sound that gives the listener a sense of danger or tension, and the sound based on the third sound data be a sound that gives the listener a sense of security or a sense of peace.
With this configuration, when it is confirmed that the push button on the transmitter has been pressed due to mischief or erroneous operation, the sound output from the audio output unit of the transmitter whose push button was operated is changed to a sound that gives a sense of security or peace of mind, making it possible to recognize that there has been no fire.

Another invention of the present application is
A fire alarm system including at least a transmitter having a push button and a switch that is turned on and off by pressing the push button, a local sounding device, a plurality of fire detectors, and a receiver that activates the local sounding device when it detects that the push button of the transmitter has been pressed or receives a signal indicating that the push button has been pressed or a fire detection signal from the fire detector,
The transmitter is
An audio output unit;
an acoustic data storage unit that stores a plurality of pieces of acoustic data outputted from the acoustic output unit;
A signal input/output unit connected to a wiring laid between the receiver and the transmitter;
A control unit;
Equipped with
The receiver includes:
The transmitter includes a means for detecting that the push button has been pressed or a means for receiving a signal indicating that the push button has been pressed, and a ringing stop operation means for stopping the ringing of the local sound device,
When the push button of the transmitter is pressed, a signal or power supply for sounding the local sound device is output, and when the sound stop operation means is operated, the output of the signal or power supply for sounding the local sound device is stopped,
The control unit of the transmitter causes the sound output unit to output a sound based on the first sound data or the second sound data while the receiver is causing the local sound device to ring,
After the receiver stops the ringing of the local sound device, if the push button of the transmitter has been pressed, a sound based on the third sound data is output from the sound output unit in place of the sound based on the second sound data, whereas if the push button of the transmitter has not been pressed, the output of the sound based on the first sound data is stopped.

Alternatively, a fire alarm system including at least a transmitter having a push button and a switch that is turned on and off by pressing the push button, a local sounding device, a plurality of fire detectors, and a receiver that activates the local sounding device when it receives a signal from the transmitter indicating that the push button has been pressed or a fire detection signal from the fire detector,
The transmitter is
An audio output unit;
A signal input/output unit connected to a wiring laid between the receiver and the transmitter;
A control unit;
Equipped with
The receiver includes:
an acoustic data storage unit that stores a plurality of pieces of acoustic data outputted from the acoustic output unit;
The transmitter comprises a means for receiving a signal indicating that the push button has been pressed, and a ringing stop operation means for stopping the ringing of the local sound device,
When the push button of the transmitter is pressed, a signal for activating the local sound device and first sound data or second sound data are transmitted to the transmitter, and a sound based on the first sound data or the second sound data is output from the sound output unit;
When the ringing stop operation means is operated, a signal to stop the ringing of the local sound device is transmitted, and third sound data is transmitted to the transmitter whose push button is pressed, causing sound based on the third sound data to be output from the sound output unit in place of the second sound data, while the control unit of the transmitter whose push button is not pressed is configured to stop output of sound based on the first sound data from the sound output unit.

With the above configuration, when the receiver stops the sound of the local sound device, the sound output from the sound output unit of the transmitter whose push button has been operated is switched, and the sound output from the sound output unit of the transmitter whose push button has not been operated is stopped. Therefore, even if the push button of a transmitter is pressed by mischief or mistaken operation, the transmitter can be easily found and quickly returned to normal.

Furthermore, preferably, the receiver is configured to stop sounding the local sound device and the transmitter if none of the plurality of fire detectors has detected a fire within a predetermined time after the push button is pressed.
With this configuration, even if the push button on the transmitter is operated to output a sound alerting the occurrence of a fire, if the detector does not detect a fire, it will determine that the push button on the transmitter was pressed due to tampering or erroneous operation, and the output of the sound will be stopped after a predetermined time has elapsed, thereby preventing a loud sound alerting the occurrence of a fire from being output for a long period of time.

The transmitter of the present invention makes it easy to identify the transmitter whose push button has been pressed when multiple sound output devices (including transmitters equipped with sound output units) are installed in an area where visibility is poor due to its structure. Furthermore, when a person who discovers a fire operates the push button of a transmitter, that transmitter is generally considered to be in the vicinity of the location where the fire has started. Therefore, by being able to easily identify the transmitter whose push button has been pressed, it becomes possible to promptly start initial fire extinguishing. Furthermore, the fire alarm system of the present invention has the effect of being able to quickly return the transmitter to its normal state even if the push button of the transmitter is pressed by mischief or erroneous operation.

1A and 1B are front views showing an embodiment of a transmitter according to the present invention. FIG. 2 is a functional block diagram showing an example of an electrical configuration of a transmitter according to an embodiment. 1 is a system configuration diagram showing an example of the configuration of a fire alarm system using a transmitter according to an embodiment. 1A is a flowchart showing an example of a processing procedure by a transmitter when a push button is operated in a fire alarm system using a transmitter of an embodiment, and FIG. 1B is a flowchart showing an example of a processing procedure by a receiver. 11 is a flowchart showing an example of a processing procedure performed by a transmitter other than the transmitter whose push button is operated in a fire alarm system using the transmitter of the embodiment.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a transmitter and a fire alarm system to which the present invention is applied will be described with reference to the drawings.
The transmitter of the present invention constitutes a P-type fire alarm system, and has a function of transmitting a signal notifying the occurrence of a fire to a fire receiver by strongly pressing a push button provided on the front to turn on an internal switch when a fire occurs, and is configured to be installed on the wall of a building or the door of a fire hydrant box for use. Note that among the disaster prevention related devices that constitute the fire alarm system, there is one called an equipment housing box in which a transmitter, a speaker, and an indicator light are integrally provided on the front panel. The present invention can also be applied to a transmitter provided in the equipment housing box and a fire alarm system that includes the equipment housing box.

FIG. 1 is a front view showing an embodiment of a transmitter according to the present invention.
1A is a conventional circular transmitter having a push button 12 provided in the center of an oval-shaped front panel 11, and a transmitter main body having a storage case with a built-in push button switch disposed behind the push button 12 is provided on the rear of the front panel 11. A pair of decorative panels 13A, 13B are provided on both sides of the front panel 11 so as to be flush with the front panel 11. The front panel 11 and the decorative panels 13A, 13B may be formed integrally, or may be formed separately and then combined.

Furthermore, a recess is formed in the upper part of the front panel 11 to accommodate a telephone jack for inserting the plug at the end of the handset cord, a recovery button, etc., and an openable sub-door 14 is provided to cover the front opening of this recess. Also, a sound outlet 15 is provided in the lower part of the front panel 11 to correspond to the speaker disposed on the rear part.
A latch mechanism is provided in the transmitter body on the rear side of the front panel 11, which holds the push button 12 in the pressed state, i.e., the on state of the push button switch, when the push button 12 is pressed rearward by a predetermined amount or more. The recovery button is a means for releasing the on state of the push button switch caused by this latch mechanism. The latch mechanism itself is provided in existing transmitters and is well known, so detailed illustration and description of the structure will be omitted.

The decorative panels 13A and 13B on both sides of the front panel 11 may have LED lamps arranged at the rear and be configured to function as indicator lights. The front panel 11 and the decorative panels 13A and 13B are formed to be circular as a whole in the example of FIG. 1(A), but as shown in FIG. 1(B), they may be formed to be rectangular, elliptical or other shapes. The transmitter shown in FIG. 1(B) differs from the transmitter in FIG. 1(A) in shape and component arrangement, but has the same function, and includes a rectangular front panel 11, a push button 12, a sub-door 14, and speaker sound outlets 15A and 15B.

FIG. 2 shows a functional block diagram of the transmitter of this embodiment.
As shown in FIG. 2(A), the transmitter 10 of this embodiment is composed of a push button switch 16 which is turned on by pressing the push button 12, an audio output unit 17 such as a speaker or buzzer, a control unit 18 which is composed of a microprocessor and a logic circuit and controls the audio output unit 17, a storage unit 19 which is composed of a non-volatile memory or the like for storing audio data output from the audio output unit 17, and a signal input/output unit I/F which is equipped with communication means for transmitting and receiving signals to and from a receiver 20.

When the push button switch 16 of the transmitter 10 is turned on by pressing the push button 12, the transmitter 10 transmits a signal notifying the occurrence of a fire from the signal input/output unit I/F to the receiver 20. The transmitter 10 of this embodiment is also configured so that the receiver 20 has a function of detecting the start or end of ringing of a local sound device (e.g., a bell) 30 installed in each security zone, or receiving a signal indicating the start or end of ringing transmitted by the receiver 20.
On the other hand, in the case of a P type, the receiver 20 is provided with area windows on the front corresponding to each of a number of alert areas, and when a transmitter in any of the alert areas is pressed or a fire detector detects a fire, it is configured to sound the area sound device 30 for that alert area to alert of a fire, and to light up the area window corresponding to the alert area in which the pressed transmitter or the fire detector that detected the fire is installed, thereby notifying that a fire has been detected in that alert area.

The memory unit 19 of the transmitter 10 stores first acoustic data notifying the occurrence of a fire, second acoustic data notifying the occurrence of a fire and indicating that the push button of the transmitter has been operated, and third acoustic data that is output when the transmitter whose push button has been operated receives a bell ringing end signal from the receiver 20.
The first acoustic data is data for generating an original fire alarm sound (alarm bell sound) that gives a sense of danger or tension to the listener, such as a sizzling sound that notifies the occurrence of a fire. The second acoustic data is data for generating a sound that adds a sound such as a buzzing sound to the original fire alarm sound (alarm bell sound) that notifies the occurrence of a fire.

The sound added in the second sound data can be any sound that can be distinguished from the sound in the first sound data, such as a voice saying "The push button has been pressed," the sound of a striking bell such as "Clang clang clang...," or the cries of birds and animals. The volume of the sound output by the transmitter based on the first sound data should be equal to the volume of the local sound device. The volume of the sound added in the second sound data should be loud enough to be distinguished from the main sound.

In addition, the second sound data may not be a synthetic sound in which another sound is added to the original fire alarm sound, but may be a single sound having a different frequency or tone from the original fire alarm sound. In short, the second sound data may be any sound that can be distinguished from the original fire alarm sound (alarm bell sound) and gives a sense of danger or tension to a person who hears the sound.
On the other hand, the third audio data may be any audio that gives a sense of security or peace of mind, such as a music box melody, classical music, the sound of flowing water, birds chirping, or other pleasant sounds, voice only, etc. The sound based on the third audio data may be output at a lower volume than the sound based on the second audio data.

Instead of providing the transmitter 10 with a memory unit 19 for storing the acoustic data to be output from the acoustic output unit 17, as shown in FIG. 2(B), a configuration may be adopted in which a plurality of acoustic data to be output from the acoustic output unit 17 of the transmitter 10 is stored in a memory unit 21 of the receiver 20, and when the push button switch of the transmitter 10 is turned on, the acoustic data to be output from the acoustic output unit 17 of the transmitter 10 is read from the memory unit 22 and transmitted to the corresponding transmitter 10.
In addition, although not shown, the receiver 20 is equipped with a function for detecting when the push button of the transmitter 10 has been pressed or a function for receiving a signal sent by the transmitter 10, a local alarm stop button for stopping the alarm of each local sounding device 30, and a recovery button for restoring the system to the normal monitoring state before the fire alarm was issued.

Next, a configuration example of a fire alarm system using the transmitter of the embodiment shown in Fig. 2(A) will be described with reference to Fig. 3. In Fig. 3, the letter B denotes a bell as the local sound device 30, the letter P denotes the transmitter 10, and the letter S denotes a fire detector (hereinafter referred to as a detector). Also, Re1, Re2, and Re3 are terminating resistors.
Conventional transmitters do not require a power source because the receiver only needs to detect the on/off state of the push button switch. In contrast, the transmitter of the embodiment shown in Fig. 2(A) is equipped with an audio output unit 17, a control unit 18, and a storage unit 19, and therefore requires a power source to operate these units.

Therefore, in a fire alarm system using the transmitter 10 of the embodiment shown in Fig. 2(A), as shown in Fig. 3, auxiliary power lines V+, V- are provided for supplying power from the receiver 20 to the transmitter (P) 10, so as to supply power to the transmitter (P) 10. On the other hand, the bell B is connected to the district acoustic power lines NAC+, NAC-, which are separate power lines drawn from the receiver 20.
In addition, in the P-type fire alarm system, a signal line L and a common line C are provided as a sensor circuit that is pulled out from the receiver 20 and to which the sensor S is connected, and the transmitter (P) 10 of this embodiment is also connected to this signal line L and common line C.

The fire detector S has a function of changing the impedance by turning on a switch installed between L and C when it detects a fire, and determining that a fire has occurred when the receiver 20 detects a change in impedance between L and C.
When the push button switch of any of the transmitters 10 is turned on or the detector S detects a fire and activates, the receiver 20 detects this via the signal line L and common line C and starts ringing the bell B by supplying power via the local sound power supply lines NAC+, NAC-, and stops the ringing of the bell B by cutting off the power supply. The transmitter 10 of this embodiment is configured to be able to detect the start/end of ringing of the bell by monitoring the local sound power supply lines NAC+, NAC-.

The transmitter 10 of this embodiment is configured to change the impedance between L and C when the push button switch 16 is turned on, just like a sensor. However, in this case, since the signal line L and the common line C are common, the receiver 20 cannot distinguish whether the sensor S has been activated or the transmitter 10 has been operated. Therefore, a wiring A is provided for the transmitter 10 to transmit a signal to the receiver 20 to distinguish between the activation of the transmitter and the activation of the sensor. This wiring A can also be used to provide power to light a lamp (response light) provided on the transmitter 10 when the receiver 20 detects the activation of the transmitter 10.

Next, the operation of the transmitter 10 and the receiver 20 in the fire alarm system shown in Fig. 3 will be described with reference to the flow chart of Fig. 4. Fig. 4(A) shows the procedure of processing executed by the control unit 18 of the transmitter 10, and Fig. 4(B) shows the procedure of processing by the receiver 20.
4A, the transmitter 10 first determines whether the push button 12 has been pressed based on the on/off state of the push button switch 16 (step S11). If it is determined that the push button 12 has been pressed (Yes), the process proceeds to the next step S12, where a fire alarm signal is transmitted to the receiver 20. The receiver 20, having received the fire alarm signal, outputs a signal to start ringing (audio output) to the local sound device (bell) 30 by supplying power to the local sound power supply lines NAC+ and NAC-.

Then, the transmitter 10 reads out the second acoustic data from the memory unit 19, and starts ringing (sound output) from the acoustic output unit (speaker) 17 based on the second acoustic data (step S13). Then, the process proceeds to step S14, and determines whether or not a ringing end signal that stops the ringing from the local acoustic device (bell) 30 has been input from the receiver 20. If it is determined that a ringing end signal has been input (Yes), the process proceeds to the next step S15, where the ringing based on the second acoustic data that was started in step S13 is ended, the third acoustic data is read out from the memory unit 19, and the ringing based on the third acoustic data is started from the acoustic output unit (speaker) 17 (sound output). If it is determined in step S14 that a ringing end signal has not been input (No), the process skips step S15 and proceeds to step S16.

In step S16, it is determined whether or not the recovery button provided on the transmitter 10 has been operated. As described above, the push button 12 has a latch function and a recovery button that releases the latch, and when the recovery button is operated, the push button switch 16 is turned off. Therefore, by monitoring the on/off state of the push button switch 16, it is possible to determine whether or not the recovery button has been operated.
If it is determined in step S16 that the recovery button has not been operated (No), the process returns to step S4 and repeats the above steps S14 to S16. If it is determined in step S16 that the recovery button has been operated (Yes), the process proceeds to the next step S17 and ends the ringing (sound output) based on the second sound data or the third sound data.

Meanwhile, as shown in FIG. 4(B), the receiver 20 first determines whether a fire alarm signal has been input from any of the transmitters 10 (step S21). If it determines that a fire alarm signal has been input (Yes), the receiver 20 proceeds to the next step S22, where it displays a fire on a display panel of the receiver 20 and sets a flag (fire flag) indicating that the fire alarm system is aware of the fire condition. Next, it outputs a ringing start signal to the local sound device (bell) 30 in the area where the transmitter that sent the fire alarm signal is located, causing it to start ringing, and sets a predetermined flag (ringing start flag) (step S23).

Then, it is determined whether a ringing stop button provided on the receiver 20 for stopping the ringing of the local sound device has been operated (step S24). If it is determined that the ringing stop button has been operated (Yes), the process proceeds to the next step S25, where a ringing end signal is output to the ringing local sound device (bell) 30 to end the ringing, and the ringing start flag is cleared.
When the receiver 20 transmits a fire alarm signal and starts ringing the local sound device (bell) 30, a disaster prevention officer waiting at the disaster prevention management center where the receiver 20 is located goes to the scene of the fire alarm and checks whether or not there is a fire, and if there is no fire, determines that the alarm was caused by a prank or erroneous operation, contacts the manager waiting at the disaster prevention management center by phone, and presses the alarm stop button to end the alarm. The officer who went to the scene also opens the sub-door of the transmitter that issued the alarm and presses the internal recovery button to release the push button latch.

Also, if it is determined in step S24 that the ringing stop button has not been operated (No), step S25 is skipped and the process proceeds to step S26.
In step S26, it is determined whether or not a recovery button for returning the fire alarm system to a normal state has been pressed in the receiver 20. If it is determined that the recovery button has not been pressed (No), the process returns to step S24 and the above processes S24 to S26 are repeated.

If it is determined in step S26 that the recovery button on the receiver 20 has been pressed (Yes), the display panel of the receiver 20 is cleared and the fire flag is cleared. Then, the process proceeds to the next step S28, where the ringing start flag is checked to determine whether ringing by the district sound device 30 has ended. If it is determined that ringing by the district sound device (bell) 30 has ended (Yes), the process ends.
On the other hand, if it is determined in step S28 that the ringing by the district sound device (bell) 30 has not ended (No), the process proceeds to step S29, where a ringing end signal is output to the district sound device (bell) 30 that is currently ringing, thereby ending the ringing and terminating the series of processes. At this time, the receiver 20 also clears the ringing start flag. Although not shown in Fig. 4, the receiver 20 outputs a district sound stop signal to the district sound device (bell) 30 and the transmitter 10 if none of the fire detectors have detected the occurrence of a fire even after a predetermined time has elapsed since the push button 12 of any of the transmitters 10 was pressed.

The process flow of the transmitter 10 in Fig. 4(A) shows the procedure when the push button of the transmitter is operated. Fig. 5 shows the process procedure of the transmitter 10 when the push button of another transmitter in the same district is operated and the receiver 20 supplies the district sound power source (NAC+, NAC-) for ringing to the district sound device (bell) 30, i.e., transmits a ringing start signal.
As shown in Fig. 5, the control unit 18 of the transmitter 10 first judges whether or not a bell ringing start signal has been input from the receiver 20 (step S31). If it is judged that the local sound power source (NAC+, NAC-) has been supplied (Yes), the process proceeds to the next step S32, where the first sound data is read from the storage unit 19 and supplied to the sound output unit 17, and ringing based on the first sound data is started. Then, the process proceeds to step S33, where the control unit 18 judges whether or not a ringing end signal has been input from the receiver 20 to stop ringing by the local sound device (bell) 30. If it is judged that the ringing end signal has been input (Yes), the process proceeds to the next step S34, where ringing by the local sound device (bell) 30 is stopped, and the process ends.

According to the transmitter of the above embodiment and the fire alarm system using the same, the transmitter that sent the fire alarm signal rings with a sound different from the ringing sound of the local sound device (bell) and other transmitters, so that a disaster prevention officer who goes to the scene can easily identify the location of the transmitter whose push button was operated. Therefore, it is possible to determine whether the alarm was caused by a prank or erroneous operation, and to call the disaster prevention center manager to quickly stop the ringing of the local sound device (bell) or to operate the transmitter's recovery button to return the transmitter to its original state. As a result, it is possible to prevent the sound output device from continuing to output sound notifying of a fire for a long period of time, and to quickly return to normal (normal monitoring state) by operating the system recovery button on the receiver.

Although the present invention has been described above based on the embodiments, the present invention is not limited to the above-mentioned embodiments. For example, in the above-mentioned embodiment, the transmitter 10 is provided with a control unit 18 for controlling the sound output unit 17, and the sound output unit 17 starts ringing, stops ringing, and switches the sound output by the control unit 18, but the control unit 18 may be omitted or a simple logic circuit may be provided, and the receiver 20 may be configured to transmit a control signal for starting ringing, stopping ringing, and switching the sound output by the sound output unit 17.
In the above embodiment, the latch mechanism of the push button 12 of the transmitter 10 is configured mechanically, but the ON signal may be latched electrically.

Furthermore, in the above embodiment, the receiver 20 is configured to supply auxiliary power to the transmitter 10, but the transmitter 10 may be configured to have a built-in battery, thereby eliminating the need for wiring to supply auxiliary power.
In addition, in the above embodiment, the receiver 20 is configured to supply auxiliary power to the transmitter 10, but the wiring for supplying auxiliary power may be omitted by supplying power from the sensor line between L and C which is connected to the transmitter in the same manner as the sensor.
Alternatively, instead of supplying auxiliary power from the receiver 20 to the transmitter 10, the wiring for supplying auxiliary power may be omitted by supplying power from a line between A and C connected to the transmitter in the same manner as the response light inside the transmitter.

In addition, in the fire alarm system of FIG. 3, when any of the transmitters 10 outputs a signal indicating that the push button 12 has been pressed, the receiver 20 supplies power to the local sound device 30 to make it ring and then cuts off the power to end the ringing. However, instead of supplying and cutting off the power, the system may be configured so that power is constantly supplied to the local sound device 30, and when any of the transmitters 10 outputs a signal indicating that the push button has been pressed, the receiver 20 outputs a signal to start the local sound device 30 ringing.

REFERENCE SIGNS LIST 10 Transmitter 11 Front panel 12 Push button 13A, 13B Decorative panel 14 Sub-door 15 Sound outlet 16 Push button switch 17 Sound output unit 18 Control unit 19 Memory unit 20 Receiver 21 Memory unit 30 District sound device (bell)

Claims (7)

A transmitter constituting a fire alarm system including at least a transmitter having a push button and a switch that is turned on and off by pressing the push button, a local sounding device, and a receiver that activates the local sounding device when it detects that the push button has been pressed or receives a signal indicating that the push button has been pressed from the transmitter,
An audio output unit;
an acoustic data storage unit that stores a plurality of pieces of acoustic data outputted from the acoustic output unit;
A signal input/output unit connected to a wiring laid between the receiver and the transmitter;
A control unit and
The control unit outputs a sound based on first sound data from the sound output unit while the push button is not pressed and the receiver is causing the local sound device to ring, and outputs a sound based on second sound data from the sound output unit while the receiver is causing the local sound device to ring in response to pressing of the push button. A transmitter constituting a fire alarm system including at least a transmitter having a push button and a switch that is turned on and off by pressing the push button, a local sounding device, and a receiver that activates the local sounding device when it detects that the push button has been pressed or receives a signal indicating that the push button has been pressed from the transmitter,
An audio output unit;
an acoustic data storage unit that stores a plurality of pieces of acoustic data outputted from the acoustic output unit;
A signal input/output unit connected to a wiring laid between the receiver and the transmitter;
A control unit;
Equipped with
The control unit causes the audio output unit to output a sound based on second audio data while the receiver is ringing the local audio device in response to pressing of the push button, and causes the audio output unit to output a sound based on third audio data in place of the sound based on the second audio data after the receiver stops ringing the local audio device. 3. The transmitter according to claim 2, wherein the control unit causes the sound based on the second acoustic data to be output from the acoustic output unit at a volume equivalent to a volume of the local acoustic device, and causes the sound based on the third acoustic data to be output from the acoustic output unit at a volume lower than that of the sound based on the second acoustic data. The transmitter according to claim 2 or 3, characterized in that the sound based on the second sound data is a sound that gives a sense of danger or tension to the listener, and the sound based on the third sound data is a sound that gives a sense of security or calm to the listener. A fire alarm system including at least a transmitter having a push button and a switch that is turned on and off by pressing the push button, a local sounding device, a plurality of fire detectors, and a receiver that activates the local sounding device when it detects that the push button of the transmitter has been pressed or receives a signal indicating that the push button has been pressed or a fire detection signal from the fire detector,
The transmitter is
An audio output unit;
an acoustic data storage unit that stores a plurality of pieces of acoustic data outputted from the acoustic output unit;
A signal input/output unit connected to a wiring laid between the receiver and the transmitter;
A control unit;
Equipped with
The receiver includes:
The transmitter includes a means for detecting that the push button has been pressed or a means for receiving a signal indicating that the push button has been pressed, and a ringing stop operation means for stopping the ringing of the local sound device,
When the push button of the transmitter is pressed, a signal or power supply for sounding the local sound device is output, and when the sound stop operation means is operated, the output of the signal or power supply for sounding the local sound device is stopped,
The control unit of the transmitter causes the sound output unit to output a sound based on the first sound data or the second sound data while the receiver is causing the local sound device to ring,
A fire alarm system characterized in that, after the receiver stops the sounding of the local sound device, if the push button of the transmitter has been pressed, a sound based on third sound data is output from the sound output unit in place of the sound based on the second sound data, while if the push button of the transmitter has not been pressed, the output of the sound based on the first sound data is stopped. A fire alarm system including at least a transmitter having a push button and a switch that is turned on and off by pressing the push button, a local sounding device, a plurality of fire detectors, and a receiver that activates the local sounding device when it receives a signal from the transmitter indicating that the push button has been pressed or a fire detection signal from the fire detector,
The transmitter is
An audio output unit;
A signal input/output unit connected to a wiring laid between the receiver and the transmitter;
A control unit;
Equipped with
The receiver includes:
an acoustic data storage unit that stores a plurality of pieces of acoustic data outputted from the acoustic output unit;
The transmitter comprises a means for receiving a signal indicating that the push button has been pressed, and a ringing stop operation means for stopping the ringing of the local sound device,
When the push button of the transmitter is pressed, a signal for activating the local sound device and first sound data or second sound data are transmitted to the transmitter, and a sound based on the first sound data or the second sound data is output from the sound output unit;
When the ringing stop operation means is operated, a signal to stop the ringing of the local sound device is transmitted, and third sound data is transmitted to the transmitter whose push button is pressed, causing the sound output unit to output a sound based on the third sound data in place of the second sound data. Meanwhile, the control unit of the transmitter whose push button is not pressed stops outputting the sound based on the first sound data from the sound output unit. The fire alarm system according to claim 5 or 6, characterized in that the receiver stops the sounding of the local sound device and the transmitter if none of the plurality of fire detectors detects a fire even after a predetermined time has elapsed since the push button was pressed.

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