JP2009075997A - Fire alarm - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fire alarm capable of preventing an erroneous notification by fire detection other than an actual fire and preventing a removed head part from being left unmounted. <P>SOLUTION: The fire alarm 1 includes a base part 10 stuck to a mounting surface; and a head part detachably mounted to the base part and including a fire sensing part 22 discriminating a fire based on a fire detection signal, and an alarm part 23 for sounding an alarm according to the discriminated result of the fire in the fire sensing part. The base part includes an attachment/detachment detecting part 12 for detecting the attached/detached state of the head part; an alarm sounding part 13 for informing that the head part is left detached; and a control means 11 for sounding an alarm by the alarm sounding part when the detached state of the head part continues after the lapse of a preset stand-by time after the detachment of the head part is detected by the attachment/detachment detecting part. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a base portion that is fixed to a mounting surface such as a ceiling surface or a wall surface, a fire detection portion that is detachably attached to the base portion and that distinguishes a fire based on a fire detection signal, and the fire detection portion. The present invention relates to an improvement of a fire alarm device that includes a head portion that includes an alarm portion that sounds an alarm sound according to the fire discrimination result and detects smoke, heat, and the like.

2. Description of the Related Art Conventionally, there is known a fire alarm that is fixed to a mounting surface, detects a smoke, heat, or the like and issues a fire alarm with a sound or voice message.
Such fire alarms are installed in general office buildings and public spaces, and in recent years, due to the background of legal development, commercial AC power sources and lithium-ion batteries are used as driving power sources for general detached houses and apartment houses. The spread of fire alarms developed for each house is progressing.

When the above-mentioned fire alarm is a type that detects smoke, if the smoke detection means built in the smoke detection chamber with the smoke inflow hole detects smoke, the control means will cause a fire based on the fire detection signal. The alarm sound is generated according to the determination result of the control means.
The smoke detection means installed in the smoke detection chamber has a light receiving part and a light emitting part, and light regularly emitted from the light emitting part is scattered by the smoke flowing in from the smoke inflow hole. Light is received by the light receiving unit, and smoke is detected.
However, for example, when a householder smokes cigarettes or smokes pest control, non-fire smoke that is different from smoke due to an actual fire is detected and a false alarm is reported. If such misreports are made, noise will be generated and an unnecessary anxiety will be given to neighboring residents.

In Patent Document 1 below, an alarm device having the following configuration is proposed in order to solve the above problems.
Patent Document 1 discloses that a predetermined alarm stop operation by an alarm stop switch, such as leaving a switch pull string, is discriminated and the output of an alarm sound is stopped, and the alarm is stopped while the alarm is stopped. The alarm stop state is canceled after a predetermined time has elapsed from the alarm stop, and an alarm stop control unit is provided that outputs an alarm again if the alarm signal continues at that time.
According to this, if a predetermined alarm stop operation is performed, the alarm can be easily stopped, and the alarm stop state is forcibly released after a certain period of time has elapsed since the alarm stop. It can be prevented.
JP 2005-208957 A

However, in the alarm device described in Patent Document 1, no consideration is given to the case where the user tries to prevent the false alarm by removing the head portion incorporating the fire detection unit or alarm unit from the base unit of the alarm device. It was not.
In the case of fire alarms, if the head part detachably attached to the base part is structured so that even ordinary people can easily attach and detach it, in order to prevent false alarms, the householder smokes cigarettes or pest control The head part may be removed from the base part only while smoke is being smoked.
This prevents false alarms from fire alarms, but forgets to attach the head part to the base part as it is, leave it unmonitored, and the original functions of the fire alarm function during an actual fire. There is a risk that it cannot be demonstrated.

  The present invention has been proposed in order to solve the above-mentioned problem, and its purpose is to prevent a false alarm due to a fire detection other than an actual fire and to prevent forgetting to attach the head part removed for that purpose. To provide an alarm.

  In order to achieve the above object, a fire alarm according to claim 1 of the present invention includes a base portion fixed to a mounting surface, a detachable attachment to the base portion, and a fire based on a fire detection signal. And a head part with a built-in alarm part that sounds an alarm sound according to the fire discrimination result at the fire sensing part, wherein the base part is After detecting the attachment / detachment detection unit for detecting the attachment / detachment state of the head unit, the warning sounding unit for notifying that the head unit remains detached, and the attachment / detachment detection unit detecting that the head unit has been removed. When the state has exceeded a preset standby time, control means is provided for causing a warning sound to sound from the warning sound sounding section.

  The fire alarm device according to claim 2 of the present invention includes a base portion fixed to the mounting surface, a fire detection portion that is detachably attached to the base portion, and that determines a fire based on a fire detection signal, And a head part with a built-in alarm part that sounds an alarm sound according to the fire discrimination result in the fire sensing part, wherein the head part detects the attachment / detachment state to the base part The attachment / detachment detection unit, and the attachment / detachment detection unit detects that the head unit has been removed from the base unit. Control means for notifying that the head part remains detached from the part.

According to a third aspect of the present invention, in the first or second aspect, the attachment / detachment detection unit includes a tamper switch that detects that the head unit is detached from the base unit.
According to a fourth aspect of the present invention, in the second aspect, a battery is provided in the head unit, and the battery is used as a driving power source for the alarm unit, the attachment / detachment detection unit, and the control means.

According to the first aspect of the present invention, when the head part is removed and left unattended, a warning sound is output from the warning sound ringing part, so that a householder or the like is urged to attach the head part. Can do.
In addition, after detecting that the head unit has been removed by the attachment / detachment detection unit, a control unit is provided for causing a warning sound to be emitted from the warning sound sounding unit when the state has exceeded a preset standby time. Therefore, it is possible to prevent the head portion from being removed and left unattended, and to prevent the non-monitoring state from continuing. Therefore, even when non-fire smoke is generated, such as when smoking or pest control smoke, the head part can be removed to prevent false alarms, giving an unnecessary anxiety to neighboring residents, etc. There is no end.
In addition, since the warning sound is made from the warning sounding part of the base part fixed to the mounting surface such as the ceiling or wall, it is immediately possible to determine where the head part of the fire alarm installed has been removed. Can be identified.

According to the second aspect of the present invention, the head unit includes an alarm unit that sounds an alarm sound according to a fire determination result in the fire detection unit, and an attachment / detachment detection unit that detects the attachment / detachment state to the base unit. Therefore, when the head part is removed and left unattended, a warning sound is output, and a householder or the like can be urged to attach the head part.
Further, after the attachment / detachment detection unit detects that the head unit has been removed from the base unit, a control for notifying a warning sound from the alarm unit of the head unit when the state has exceeded a preset standby time Since the head portion is removed, it is possible to prevent the head portion from being removed and left unattended, and to prevent the non-monitoring state from continuing. Therefore, when non-fire smoke is generated, such as when smoking or pest control smoke, it is possible to remove the head part to prevent false alarms and give unnecessary uneasiness to neighboring residents etc. There is no.
Furthermore, the warning sound is made by an alarm unit that sounds an alarm sound in the event of a real fire on the head unit, and the speaker that sounds the alarm sound and the speaker that sounds the alarm sound can be shared. There is no need to provide a loudspeaker, and there is no increase in size and complexity. Thus, cost can be reduced. And since the warning sound sounds from the removed head part, for example, even if the head part is removed from the base part and only the head part is carried, the removed head part can be recognized and removed. It is possible to prevent the lost head portion from being lost.

According to the third aspect of the present invention, by using the tamper switch for the attachment / detachment detection unit, the attachment / detachment of the head unit can be detected with a relatively low cost and a small configuration.
According to the fourth aspect of the present invention, since the battery provided in the head unit is used as a driving power source for the alarm unit, the attachment / detachment detection unit, and the control unit, power can be supplied with a simple configuration, Cost can be reduced.

The best mode for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic perspective view of the fire alarm device according to the first embodiment, showing a state in which the head portion is removed from the base portion. 2 is a block diagram showing the internal configuration of the fire alarm device according to the present embodiment. FIGS. 3A and 3B are block diagrams showing the configuration of the drive power source of the fire alarm device according to the present embodiment. These are flowcharts which show an example of the basic operation | movement of the fire alarm device which concerns on this embodiment.
In the following explanation, regarding a fire alarm device that detects smoke by photoelectric detection and distinguishes an actual fire, the sound that informs the actual fire is used as an alarm sound, and the sound that informs that the head part has been removed. The sound is described as a warning sound.

First, a schematic configuration of the fire alarm 1 will be described with reference to FIGS. 1 and 2.
The illustrated fire alarm 1 includes a disk-shaped base 10 that is attached to a ceiling surface (attachment surface) of a house, etc., and is detachably attached to the base 10 (in the direction of the white arrow). The head unit 20 is provided.
The base unit 10 informs that the MPU 11 that controls each unit, which will be described later, the attachment / detachment detection unit 12 that detects the attachment / detachment state of the head unit 20, and the head unit 20 remains removed, and a warning sound with a speaker SP Unit 13, a memory 14 for storing a control program, a warning sound stop switch SW for stopping a warning sound, and a circuit board (not shown) on which electronic components are mounted. MPU 11 detects the removal of head unit 20. Then, a timer 11a for measuring a preset standby time is provided until a warning sound is notified.
The MPU 11 constitutes a control means for controlling each part, and, as will be described later, after detecting that the head part 20 is removed in the attachment / detachment detection part 12, the state has passed a preset standby time. In some cases, a warning sound is generated from the speaker SP of the warning sound generation unit 13 urging attachment of the head unit 20.

The head unit 20 includes an MPU 21 that controls each unit, a fire detection unit 22 that determines a fire based on a smoke detection signal from a smoke detection sensor (not shown), and an alarm according to a fire determination result in the fire detection unit 22. An alarm unit 23 that sounds a sound, a memory 24 that stores a control program, an alarm sound stop switch SW that stops an alarm sound, and a circuit board (not shown) on which electronic components are mounted are provided.
A method for determining the fire by the MPU 21 is not particularly limited, but here, it is determined whether or not the smoke detection signal exceeds a preset threshold value, and a fire alarm is sounded.

The tamper switch 10c is provided in a cutout portion 10cb formed in a part of the inner surface of the base portion 10, and is configured such that a contact operating portion 10ca supported by a spring (not shown) protrudes. Therefore, when the contact operating unit 10ca is pressed, the contact operating unit 10ca is pushed down, and the contact is closed, it is detected that the head unit 20 is mounted. When the head part 20 is removed from the base part 10, the pressing of the contact actuating part 10ca is released, the contact actuating part 10ca is projected by the elastic force of the spring, and the contact is opened, so that the head part 20 is removed. It comes to detect.
Here, the attachment / detachment detection unit 12 is not the tamper switch 10c as in the present embodiment, but may be any one that can detect the presence or absence of attachment, such as an optical sensor, an infrared sensor, or a magnetic sensor. It may be used to detect the presence or absence of attachment.

The base portion 10 is fixed to the ceiling surface by screw holes 10a provided at two locations. The locking portions 10b provided at the four locations and the claw portions 20e provided at the head portion 20 are engaged with each other. The head unit 20 is detachably attached to the unit 10. In addition, a speaker hole 10e is formed in the base portion 10, and a warning sound from the warning sound sounding portion 13 is sounded from here.
The head unit 20 includes a smoke detection sensor (not shown), an alarm unit 23, a fire detection unit 22, and the like. The smoke detection sensor includes a light emitting unit such as a light emitting diode and a light receiving unit such as a photodiode. This is a so-called photoelectric sensor configured to project from the circuit board toward the head portion 20, detect smoke flowing in from the smoke inflow hole 20d, and output a smoke detection signal.
The smoke detection sensor detects the smoke by, for example, arranging the light receiving unit at a position where it does not directly receive the light from the light emitting unit and receiving the scattered light generated by the inflow of smoke by the light receiving unit. It may be. The smoke detection means may be any means capable of detecting smoke, and may be, for example, an ionization sensor instead of a photoelectric sensor.

  An operation button (not shown) for operating the alarm sound stop switch SW and the alarm sound stop SW is configured on the outer surface portion of the head portion 20, and the alarm sound is similarly given from the outer peripheral surface of the head portion 20. The pull string 20a for operating the stop switch SW and the warning sound stop SW is extended, and the alarm sound and the warning sound can be stopped by any operation of the operation button and the pull string 20a.

The head portion 20 has a space for receiving a smoke detection sensor and is a cylindrical body having a bottom portion 20c on the indoor space side, and a plurality of smoke inflow holes 20d for taking in smoke are formed on the side peripheral surface thereof. Has been.
A disk-shaped speaker SP is disposed on the inner surface side of the bottom portion 20c of the head portion 20, and a plurality of speaker holes (not shown) are formed in the bottom portion 20c.
The head unit 20 may further include an insect repellent cover that prevents intrusion of insects and dust from the smoke inflow hole 20d of the head unit 20.

Next, the configuration of the drive power source of the fire alarm 1 will be described based on FIGS. 3 (a) and 3 (b).
The example shown in FIG. 3A is an example in which drive power is supplied from commercial AC power, and the MPU 11, the timer 11 a, the attachment / detachment detection unit 12, and the warning sounding unit 13 provided in the base unit 10 are AC power sources. It is comprised so that it may drive by supply from. And by attaching the head part 20 to the base part 10, MPU21 of the head part 20, the fire detection part 22, and the alarm part 23 are electrically connected so that it may drive by the supply from the same AC power supply.
In the example shown in FIG. 3B, the MPU 11, the timer 11a, the attachment / detachment detection unit 12, and the warning sounding unit 13 provided in the base unit 10 are configured to be driven by supply from the battery B1, and the head unit 20 The MPU 21, the fire detection unit 22, and the alarm unit 23 are electrically connected to be driven by supply from the same battery B 1.
Here, the configuration of power supply is not limited to the above-described example. For example, the base unit 10 and the head unit 20 may each include a battery. As the battery, a long-life lithium battery or the like can be used.

Next, an example of the basic operation in the fire alarm device 1 having the above-described configuration will be described with reference to FIG.
If it is detected that the head unit 20 is not removed, that is, if the head unit 20 is not removed, the monitoring state in which smoke detection by the smoke detection sensor is possible is continued (S100).
In this monitoring state, the fire is determined based on the smoke detection signal from the smoke detection sensor, and if it is determined that the fire is detected, the fire alarm is sounded from the speaker SP of the alarm unit 23. For example, the fire alarm may sound a buzzer sound or a sound message such as “view, view, fire”. Here, an alarm LED (not shown) may be turned on or blinked simultaneously with the alarm sound.

When the head unit 20 is removed from the base unit 10, the tamper switch 10c is released, and when the attachment / detachment detection unit 12 detects that the head unit 20 is detached, the timer 11a is activated to start timing (S100, S101).
When the timer 11 is started and a preset standby time elapses, the alarm sounding unit 13 is activated to output an attachment request signal for prompting the attachment of the head unit 20 (S102, S104). That is, after the head unit 20 is removed and the presence or absence of the head unit 20 is detected, when the state continues even after a preset standby time has elapsed, the buzzer is turned off from the speaker SP of the warning sounding unit 13. Sound a sound, or sound a voice message such as “Please attach the head”. Here, a warning LED (not shown) may be turned on or blinked simultaneously with the warning sound.
When the attachment / detachment detection unit 12 detects that the head unit 20 has been returned while the timer 11a is measuring the standby time, the warning sound is stopped, the timer 11a is reset, and the normal monitoring state is restored (S103, S107, S100).
Further, when the attachment / detachment detection unit 12 detects that the head unit 20 is returned (reattached) while the warning sound is sounding, the warning sound is stopped, the timer 11a is reset, and the monitoring state is restored (S104, S105, S106, S107, S100).

Here, the waiting time may be a unit of several minutes, or may be a smoke time for pest control (for example, about 2 hours). Further, it may be made to ring for about 3 minutes every hour.
Therefore, according to this, attachment of the head part 20 can be promoted reliably.
Further, if the head portion 20 is attached, the output of the attachment request signal is immediately stopped and the warning sound is stopped even if there is no operation by the operation button or the drawstring 20a.
In the above operation example, the warning sound is continuously sounded until the head unit 20 is attached. For example, the warning sound is stopped after being sounded for a predetermined time or the warning sound stop switch SW is operated. You may stop by. Further, after outputting for a predetermined time, a so-called snooze sound may be generated such that the output is repeated at intervals. Further, the warning sound and the warning sound may be distinguished by volume or may be distinguished by tone color so that they can be easily distinguished.

As described above, according to the fire alarm device 1 according to the present embodiment, when the head unit 20 remains removed, a warning sound is output, and it is possible to prompt a householder or the like to install the head unit 20. While preventing the part 20 from being removed, it is possible to prevent the non-monitoring state from continuing. Therefore, when non-fire smoke is generated, such as when smoking or pest control smoke, it is possible to remove the head part to prevent false alarms and give unnecessary uneasiness to neighboring residents etc. There is no.
Further, since the warning sound is made from the speaker SP of the warning sound ringing portion 13 of the base portion 10 fixed to the mounting surface such as the ceiling or wall, the head portion 20 of the fire alarm device 1 installed is removed. You can immediately identify whether it remains.

Next, another embodiment according to the present invention will be described with reference to the drawings.
5 to 7 show a fire alarm device according to the second embodiment, and FIG. 5 is a schematic perspective view showing an example of another embodiment of the fire alarm device according to the present invention. The removed state is shown. FIG. 6 is a block diagram showing an internal configuration of the fire alarm, and FIGS. 7A and 7B are block diagrams showing a configuration of a drive power source of the fire alarm.
In addition, it demonstrates centering around difference with 1st Embodiment, about the structure similar to 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

The fire alarm device 1 shown in the second embodiment is different in that the attachment / detachment detection unit 12 (tamper switch 10c) provided in the base unit 10 is provided in the head unit 20 in the first embodiment. Therefore, in the operation example, since the attachment / detachment detection unit 25 is provided in the head unit 20 in this embodiment, a warning sound is generated from the alarm unit 23 and each unit is controlled by the MPU 21, but a series of flows is as follows. Since it is common, the explanation is omitted.
The configuration of the tamper switch 20g is the same as that of the first embodiment. In the figure, 20ga is a contact operating part and 20gb is a notch part. Therefore, the tamper switch 20g is embedded in a notch 20gb formed in a part of the inner surface of the head portion. When the tamper switch 20g is attached to the base portion 10, pressure is applied by the end surface 10d of the base portion 10 to thereby change the contact operating portion 10ca. When the head part 20 is removed from the base part 10 by being pushed down and the pressing by the base part 10 is released, the contact operating part 20ga is configured to return to the convex state as shown in FIG. Yes.

The head unit 20 includes an MPU 21 that controls each unit, a fire detection unit 22 that determines a fire based on a smoke detection signal from a smoke detection sensor (not shown), and an alarm according to a fire determination result in the fire detection unit 22. Alarm and alarm unit 23 for notifying that sound and head unit 20 have been removed, memory 24 for storing a control program, attachment / detachment detection unit 25 for detecting the attachment / detachment state of head unit 20, alarm sound and warning sound are stopped An alarm sound / warning sound stop switch SW is provided.
The MPU 21 of the head unit 20 is configured with a timer 21a that measures a preset standby time from detection of the removal of the head unit 20 until notification of a warning sound.
The MPU 21 constitutes a control means for controlling each part, and after the attachment / detachment detection unit 25 detects that the attachment / detachment detection unit 25 is detached from the head unit base unit 10, the state of the MPU 21 is set to a preset standby time. When the time has elapsed, the alarm unit 23 of the head unit 20 notifies that the head unit 20 remains removed.

  According to this, it is possible to prevent the head unit 20 from being removed and left unattended, and to prevent the non-monitoring state from continuing, and the warning sound is generated during an actual fire provided in the head unit. Since the speaker SP that sounds the warning sound and the speaker SP that sounds the warning sound can be shared by the warning unit 23 that sounds the warning sound, there is no need to newly provide a loudspeaker SP for the warning sound. No complication or complexity. Thus, cost can be reduced. Since the warning sound is generated from the removed head part 20, for example, even if the head part 20 is removed from the base part 10 and only the head part 20 is carried, the removed head part 20 is recognized. It is possible to make the removed head portion 20 difficult to lose.

Next, based on FIG. 7 (a) (b), the structure of the drive power supply of the fire alarm 1 which concerns on 2nd Embodiment is demonstrated.
In the example shown in FIG. 7A, in the monitoring state where the head unit 20 is attached to the base unit 10, the MPU 21, the fire detection unit 22, and the alarm unit 23 of the head unit 20 are connected to the AC power source via the base unit 10. As a driving power source, the attachment / detachment detection unit 25, the alarm unit 23, and the MPU 21 are driven when the head unit 20 is removed. The head unit 20 includes a battery B2.
The example shown in FIG. 7B is configured to drive the MPU 21, the fire detection unit 22, and the alarm unit 23 of the head unit 20 by supply from the battery B 1 provided in the base unit 10 in the monitoring state. In addition, when the head unit 20 is detached, the head unit 20 includes a battery B2 as a driving power source so as to drive the attachment / detachment detection unit 25, the alarm unit 23, and the MPU 21.
Here, the configuration of power supply is not limited to the above-described example. In short, any configuration may be used as long as the attachment / detachment detection unit 25 is driven even when the head unit 20 is detached from the base unit 10. . As the battery, a long-life lithium battery or the like can be used.

  In addition, although the fire alarm installed in the ceiling surface is illustrated and described here, the present invention is not limited to this, and it can be applied to, for example, a fire alarm mounted on a wall. Absent. In addition, here, a photoelectric fire alarm that detects smoke will be described as an example. However, the present invention is not limited to this, and is not limited to this. A heat detection type fire alarm with a temperature sensor such as a thermistor, heat and smoke detection. It can also be applied to a combined fire alarm. Furthermore, the shape and internal configuration of the fire alarm 1 are not limited to the above examples, and in each embodiment, the fire alarm for a house used alone in a general detached house has been described. It is also possible to apply to a fire alarm system in which a fire alarm is connected with a signal line or the like.

It is a schematic perspective view which shows an example of embodiment of the fire alarm device which concerns on this invention, and has shown the state which removed the head part from the base part. It is a block diagram which shows the internal structure of the fire alarm which concerns on the same embodiment. (A) (b) is the block diagram which showed the structure of the drive power supply of the fire alarm device which concerns on this embodiment. It is a flowchart which shows an example of the basic operation | movement of the fire alarm which concerns on the embodiment. It is a schematic perspective view which shows an example of other embodiment of the fire alarm which concerns on this invention, and has shown the state which removed the head part from the base part. It is a block diagram which shows the internal structure of the embodiment. (A) (b) is the block diagram which showed the structure of the drive power supply of the fire alarm device which concerns on the embodiment.

Explanation of symbols

1 Fire alarm 10 Base 11 MPU (control means)
12 Detachment Detection Unit 13 Warning Sound Sounding Unit 20 Head Unit 21 MPU (Control Unit)
22 Fire detection unit 23 Alarm unit 25 Detachment detection unit

Claims (4)

A base portion fixed to the mounting surface;
Built-in fire detection unit that is detachably attached to the base unit and discriminates a fire based on a fire detection signal, and an alarm unit that sounds an alarm sound according to the fire discrimination result in the fire detection unit A fire alarm with a head,
The base part is an attachment / detachment detection part for detecting the attachment / detachment state of the head part, and a warning sounding part for notifying that the head part remains removed,
After detecting that the head unit has been removed by the attachment / detachment detection unit, a control unit is provided that causes a warning sound to be emitted from the warning sound sounding unit when the state has exceeded a preset standby time. A fire alarm characterized by A base portion fixed to the mounting surface;
Built-in fire detection unit that is detachably attached to the base unit and discriminates a fire based on a fire detection signal, and an alarm unit that sounds an alarm sound according to the fire discrimination result in the fire detection unit A fire alarm with a head,
The head part is an attachment / detachment detection part for detecting an attachment / detachment state to the base part,
After the attachment / detachment detection unit detects that the head unit has been removed from the base unit, when the state has exceeded a preset standby time, the head unit is moved from the alarm unit of the head unit. A fire alarm device comprising: control means for notifying that the battery remains detached. In claim 1 or claim 2,
The fire alarm according to claim 1, wherein the attachment / detachment detection unit includes a tamper switch that detects that the head unit is detached from the base unit. In claim 2,
A fire alarm device comprising a battery in the head unit, wherein the battery serves as a drive power source for the alarm unit, the attachment / detachment detection unit, and the control means.

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