JP6851888B2 - Alarm - Google Patents

Description

The present invention relates to an alarm device.

Conventionally, a lighting device having an LED light source has been proposed in which the brightness of the LED light source can be adjusted by operating a switch (see Patent Document 1). Further, a lighting device equipped with a nightlight and an outlet equipped with a nightlight have also been proposed (see Patent Documents 2 and 3).

Japanese Unexamined Patent Publication No. 2008-123982 Japanese Unexamined Patent Publication No. 2012-4005 Japanese Unexamined Patent Publication No. 61-10887

Here, the inventors of the present invention are conducting research on alarms. The alarm is designed to emit light in green or red to indicate that it is in a power supply state. However, the lamp portion of such an alarm cannot exhibit its function as a nightlight.

The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide an alarm device that can function as a nightlight.

The alarm device according to the present invention includes a sensor unit that outputs a signal according to the surrounding environment, an abnormality determination unit that determines whether an abnormality has occurred in the surroundings based on the signal from the sensor unit, and the abnormality determination unit. An alarm device including a light emitting control unit that blinks the light emitting unit when it is determined that an abnormality has occurred, and the illuminance sensor that outputs a signal according to the external illuminance is provided. Includes a white illuminant that emits white light, a white, transparent or translucent cover member provided on the front side of the white illuminant, and another color illuminant that develops a color different from that of the white illuminant. When the illuminance based on the signal from the illuminance sensor is higher than a predetermined value in a state where the abnormality determination unit does not determine that an abnormality has occurred and power is being supplied, the other color illuminant. Is further provided with a light emission selection unit that selects to turn on the white illuminant when the illuminance based on the signal from the illuminance sensor is equal to or less than a predetermined value, and the illuminance control unit is the illuminance sensor. When the illuminance based on the signal from is not more than a predetermined value and the white light emitting body is selected to be turned on by the light emitting selection unit, the abnormality determining unit does not determine that an abnormality has occurred, and It is characterized in that the white illuminant is turned on while power is being supplied.

According to this alarm, since it is provided with a light emitting selection unit that can select whether to light a white light emitting body or another color light emitting body, the other color light emitting body can be turned on, for example, as an energizing indicator light or as a nightlight. It becomes possible to select to turn on the white illuminant. As a result, for example, it is possible to properly use the energized indicator light and the nightlight, and it is possible to make it more convenient. In particular, when the external illuminance is higher than the predetermined value, the other color illuminant is turned on, and when the detected illuminance is less than the predetermined value, the white illuminant is turned on. Therefore, for example, when the light is turned off at night. The nightlight function can be automatically exerted, and if not, it can be turned on as an energizing indicator light. Further, the light emitting unit includes a white light emitting body and a white, transparent or translucent cover member, and the white light emitting body is lit in a state where it is not determined that an abnormality has occurred and power is being supplied. Therefore, it can be lit in white instead of green or red, and can properly function as an all-night light.

Further, in the alarm device according to the present invention, it is preferable that the light emission control unit can change the light emission brightness of the white light emitter.

According to this alarm, since the emission brightness of the white illuminant is changed, the brightness of the white illuminant is lowered to darken the nightlight when the installation location is close to the sleeping place, or the room at the installation location is quite large. In some cases, the brightness of the white light emitter can be increased to brighten the nightlight.

Further, the alarm device according to the present invention further includes an illuminance sensor that outputs a signal according to the external illuminance, and the light emission control unit has the brightness of the white light emitter according to the illuminance detected by the illuminance sensor. It is preferable to change.

According to this alarm, the brightness of the white light emitter is changed according to the detected illuminance. Therefore, the darker the surroundings, the higher the light emission brightness to maintain an appropriate brightness, or the ambient brightness and the light emission brightness. In order to make the difference between the two, the darker the surroundings, the lower the emission brightness, and the brightness that a person perceives with respect to the alarm can be made constant.

Further, the alarm device according to the present invention further includes a switch that can be operated by the user, and the light emission control unit changes the light emission brightness of the semiconductor light emitting element each time there is a specific operation on the switch, and the switch. Is preferably operated by pressing the cover member.

According to this alarm, since the switch is operated by pressing the cover member, the brightness can be adjusted by pressing the light emitting unit. Here, the user tends to make it brighter or darker when the light is turned off and the alarm is made to function as a nightlight, and when the light emitting part and the part for operating the switch are separated, the light is turned off. It becomes difficult to adjust the brightness in an environment, but with the above configuration, the brightness can be adjusted by pressing the light emitting unit even in such an environment, facilitating the brightness change operation. be able to.

Further, in the alarm device according to the present invention, it is prohibited to light the white light emitter by the light emission control unit when it is not determined by the abnormality determination unit that an abnormality has occurred and power is being supplied. It is preferable to further provide a lighting prohibition unit for causing the lighting.

According to this alarm, since a lighting prohibition unit for prohibiting the lighting of the white light emitting body by the light emission control unit is further provided, it can be used as a normal alarm when the nightlight function is not required.

Further, the alarm device according to the present invention further includes a motion sensor that detects a person existing in the detection range, and the light emission control unit is not determined by the abnormality determination unit that an abnormality has occurred, and the abnormality determination unit does not determine that an abnormality has occurred. When a person is detected in the detection range by the motion sensor while power is being supplied, it is preferable to turn on the white light emitter.

According to this alarm, when a person is detected in the detection range in a state where it is not determined that an abnormality has occurred and power is being supplied, the white light emitter is turned on, so that the detection range If there is no person in the room and there is no profit even if the nightlight function is exerted, the white light emitter can be prevented from emitting light to save power.

In the above, white is a concept including so-called light bulb color, neutral white, and daylight color.

According to the present invention, it is possible to provide an alarm that can function as a nightlight.

It is a perspective view which shows the appearance block diagram of the gas alarm which concerns on 1st Embodiment of this invention. It is a block diagram of the gas alarm shown in FIG. It is an enlarged view of the vicinity of the cover switch shown in FIG. 1, and shows the state in which the cover switch is removed. It is a flowchart which shows the control method of the gas alarm which concerns on 1st Embodiment. It is a conceptual diagram which shows the change process of the emission luminance shown in FIG. It is a block diagram of the gas alarm which concerns on 2nd Embodiment. It is a flowchart which shows the control method of the gas alarm which concerns on 2nd Embodiment. It is a block diagram of the gas alarm which concerns on 3rd Embodiment. It is a flowchart which shows the control method of the gas alarm which concerns on 3rd Embodiment. It is a block diagram of the gas alarm which concerns on 4th Embodiment. It is a flowchart which shows the control method of the gas alarm which concerns on 4th Embodiment. It is an external view which shows an example of the gas alarm for LP gas, (a) is a front view, and (b) is a side view.

Hereinafter, the present invention will be described with reference to preferred embodiments. The present invention is not limited to the embodiments shown below, and can be appropriately modified without departing from the spirit of the present invention. Further, in the embodiments shown below, some parts of the configuration are omitted from the illustration and description, but the details of the omitted technology are within a range that does not cause any contradiction with the contents described below. Needless to say, publicly known or well-known techniques are appropriately applied.

Further, the alarm device will be described below by taking a gas alarm device for LP gas or city gas (including a CO alarm function) as an example, but the alarm device is not limited to this, and is not limited to this, such as a fire alarm device or a human sensory alarm device. It may be a type that combines the functions of two or more alarms (for example, a gas fire alarm). Further, it may be an outlet type alarm device or a battery type alarm device. In addition, the alarm may have a function of operating in conjunction with another alarm.

FIG. 1 is a perspective view showing an external configuration diagram of the gas alarm according to the first embodiment of the present invention, and FIG. 2 is a block diagram of the gas alarm shown in FIG. As shown in FIGS. 1 and 2, the gas alarm 1 includes a gas sensor (sensor unit) 10, a CPU 20, a speaker 30, a white LED (white light emitting body, a light emitting unit) 40, and a switch 50 shown in FIG. These are structures covered with a housing 2 which is a resin case.

The housing 2 includes an upper case 2a on the front side and a lower case 2b on the back side, and a wiring board (reference numeral WB described later) on which the above-mentioned various configurations are mounted is housed inside these. In such a housing 2, a detection unit 3 having a gas sensor 10 inside and a notification unit 4 having a speaker 30 for alarm output inside are formed in an upper case 2a on the front side. , A cover switch (cover member, light emitting unit) 5 having a white LED 40 and a switch 50 inside is provided. As will be described later, the white LED 40 and the cover switch 5 form a light emitting portion.

The gas sensor 10 in the detection unit 3 outputs a signal (an example of a signal according to the surrounding environment) according to the concentration of the gas to be detected in the vicinity when the gas to be detected exists. Further, the detection unit 3 has an inspection port 3a for injecting gas to inspect the gas alarm 1 by an operator.

The CPU 20 controls the entire gas alarm 1 and includes an abnormality determination unit 21. When it is determined that a gas leak or a high concentration abnormality of carbon monoxide has occurred (an example when it is determined that an abnormality has occurred in the surroundings), the abnormality determination unit 21 controls to that effect. It is something to do.

The speaker 30 in the notification unit 4 outputs an alarm sound when the abnormality determination unit 21 determines that an abnormality has occurred. The gas alarm 1 may be provided with a buzzer instead of the speaker 30. The alarm sound is stopped by operating the switch 50 (short press within a predetermined time).

FIG. 3 is an enlarged view of the vicinity of the cover switch 5 shown in FIG. 1, showing a state in which the cover switch 5 is removed. As shown in FIG. 3, by removing the cover switch 5 from the gas alarm 1, for example, the white LED 40, the switch 50, and a part of the wiring board WB are exposed.

The white LED 40 is a semiconductor light emitting device that emits white light (including a light bulb color, a neutral white color, and a daylight color), and is composed of, for example, two LEDs, a first LED 41 and a second LED 42. Here, as shown in FIG. 2, the CPU 20 includes a light emission control unit 22 in addition to the abnormality determination unit 21. When the abnormality determination unit 21 determines the abnormality state, the white LED 40 is blinked by the light emission control unit 22 in order to indicate the abnormality state to the user. This blinking is stopped by a predetermined operation of the switch 50 (for example, a short press within a predetermined time).

Although the gas alarm 1 is provided with the white LED 40 in the first embodiment, the gas alarm 1 is not particularly limited to the LED, and may have other configurations such as a lamp as long as it can emit white light.

Further, as shown in FIG. 3, the switch 50 is a pressing type switch and functions as an operation unit that can be operated by the user. When operating the switch 50, the user pushes the cover switch 5 to the rear side of the gas alarm 1. As a result, a protrusion (not shown) provided on the cover switch 5 can press the button portion 50a of the switch 50 to operate the switch 50.

Here, since the cover switch 5 shown in FIG. 1 is provided with the white LED 40 inside, it also functions as a cover member provided on the light emitting side of the white LED 40. The cover switch 5 is formed of a white, transparent or translucent (slightly whitish transparent) resin, and allows the user to visually recognize the light from the white LED 40 as another color (red, green, etc.). There is no configuration.

Here, the light emission control unit 22 does not determine that a gas leak or a high concentration abnormality of carbon monoxide has occurred by the abnormality determination unit 21, and in a state where power is supplied through a battery or an outlet, the white LED 40 is used. Turn on (that is, make it always emit light). As a result, the gas alarm 1 is in a state where white light is output from the cover switch 5 in a normal state (normal state) when there is no abnormality. Therefore, at night, it can function as a nightlight. That is, in the event of an abnormality, white light is output to properly function as a nightlight without using colors such as green and red, which are excellent in visibility. In particular, in the gas alarm 1, there is a possibility that gas leakage or high concentration abnormality of carbon monoxide hardly occurs at home or the like, and as described above, it is preferable to output white light to function as a nightlight. There is also a case. As described above, in the first embodiment, the white light is output by the lighting control in the normal state, and the white light is output by the blinking control in the abnormal state, or by the blinking control when the red or yellow light emitting unit is provided. By outputting the light of, it functions as a nightlight, but it does not interfere with the abnormality notification.

Here, it is preferable that the cover switch 5 has an area equal to or larger than a predetermined area (for example, 1/30 or more of the front area of the gas alarm 1) when the gas alarm 1 is viewed from the front. Further, the cover switch 5 preferably diffuses the light from the white LED 40. This makes it easier to properly function as a nightlight.

In addition, the light emission control unit 22 changes the light emission brightness of the white LED 40 every time there is a predetermined operation (short press within a predetermined time) on the switch 50 in the lighting control state (constant light emission state) of the white LED 40. Is preferable. As a result, the brightness of the white LED 40 is lowered when the place where the gas alarm 1 is installed is close to the sleeping place, or the brightness of the white LED 40 is increased when the room where the gas alarm 1 is installed is quite large. Because it can be done. The emission brightness is controlled by any one of pulse width modulation (PWM) control, voltage control, and current control.

FIG. 4 is a flowchart showing a control method of the gas alarm 1 according to the first embodiment. The process shown in FIG. 4 is started when the power of the gas alarm 1 is turned on and ends when the power is cut off.

As shown in FIG. 4, the CPU 20 first inputs a sensor signal after performing an initial inspection or the like (S1). Next, the abnormality determination unit 21 determines whether or not it is in an abnormal state such as a gas leak or an abnormality in high concentration of carbon monoxide (S2). When it is determined that the state is abnormal (S2: YES), the light emission control unit 22 executes blinking control for blinking the white LED 40, and the CPU 20 outputs an alarm sound from the speaker 30 (S3).

Next, the CPU 20 determines whether the switch 50 has been briefly pressed (S4). If it is determined that the button has not been pressed for a short time (S4: NO), the process proceeds to step S1. On the other hand, when it is determined that the button has been pressed for a short time (S4: YES), the light emission control unit 22 executes lighting control for lighting the white LED 40, and the CPU 20 stops the alarm sound from the speaker 30. Then, this state is continued for a predetermined time (S5). After that, the process proceeds to step S1.

By the way, when it is determined that the state is not abnormal (S2: NO), the light emission control unit 22 executes lighting control for lighting the white LED 40 (S6). Next, the CPU 20 determines whether the switch 50 has been briefly pressed (S7). If it is determined that the button has not been pressed for a short time (S7: NO), the process proceeds to step S1.

On the other hand, when it is determined that the button has been pressed for a short time (S7: YES), the light emission control unit 22 changes the light emission brightness of the white LED 40 (S8). Then, the process proceeds to step S1.

FIG. 5 is a conceptual diagram showing the change processing of the emission brightness shown in FIG. As shown in FIG. 5, the CPU 20 first performs an initial inspection or the like after the power is turned on. After the initial inspection is completed, the gas alarm 1 shifts to the monitoring state. When no abnormality has occurred in this monitoring state, that is, in a normal state, the light emission control unit 22 outputs a control signal having a duty ratio of 100% to light the white LED 40.

In this state, it is assumed that the cover switch 5 (switch 50) is briefly pressed. As a result, the light emission control unit 22 outputs a control signal having a duty ratio of 50% to light the white LED 40 and reduce the light emission brightness.

Next, it is assumed that the cover switch 5 (switch 50) is briefly pressed again with the emission brightness lowered. As a result, the light emission control unit 22 outputs a control signal having a duty ratio of 20% to light the white LED 40 and reduce the light emission brightness.

After that, it is assumed that the cover switch 5 (switch 50) is further pressed for a short time. In this case, the light emission control unit 22 outputs a control signal having a duty ratio of 50% to light the white LED 40 and increase the light emission brightness.

Next, it is assumed that the cover switch 5 (switch 50) is pressed again for a short time. In this case, the light emission control unit 22 outputs a control signal having a duty ratio of 100% to light the white LED 40 and increase the light emission brightness. After that, the above will be repeated.

In this way, according to the gas alarm 1 according to the first embodiment, the light emitting unit includes the white LED 40 and the white, transparent or translucent cover switch 5, and it is determined that an abnormality has occurred. However, since the white LED 40 is lit while power is being supplied, it can be lit in white instead of green or red, and can be appropriately functioned as a nightlight.

Further, in order to change the emission brightness of the white LED 40, the brightness of the white LED 40 is lowered when the installation location is close to the sleeping place to darken the nightlight, or when the room at the installation location is quite large. Can be increased to brighten the nightlight.

Further, since the switch 50 is operated by pressing the cover switch 5, the brightness can be adjusted by pressing the light emitting unit. Here, the user tends to make the gas alarm 1 brighter or darker when the gas alarm 1 is made to function as a nightlight by turning off the light, and when the light emitting unit and the cover switch 5 are separated from each other, the light is turned off in a dark environment. Under the above, it becomes difficult to adjust the brightness, but with the above configuration, the brightness can be adjusted by pressing the light emitting unit even in such an environment, and the brightness change operation can be facilitated. Can be done.

Next, a second embodiment of the present invention will be described. The alarm device according to the second embodiment is the same as that of the first embodiment, but a part of the configuration and the like are different. Hereinafter, the differences from the first embodiment will be described.

FIG. 6 is a block diagram of the gas alarm 1a according to the second embodiment. As shown in FIG. 6, the gas alarm 1a according to the second embodiment is newly provided with a green LED (other color light emitter) 60 and a red LED 70. The green LED 60 is a semiconductor light emitting device that emits green light (a color different from that of the white LED 40). The red LED 70 is a semiconductor light emitting device that emits light in red. These LEDs 60 and 70 are provided adjacent to the white LED 40 and emit light to the outside via the cover switch 5, but the present invention is not limited to this, and the LEDs may be provided so as to be able to emit light to the outside at other places. ..

Further, in the gas alarm 1a according to the second embodiment, when the abnormality determination unit 21 does not determine that an abnormality has occurred, the green LED 60 is used as an energization indicator to indicate that power is being supplied. It is capable of emitting light. Further, the gas alarm 1a according to the second embodiment is configured to make the red LED 70 emit light as an alarm indicator lamp when the abnormality determination unit 21 determines that an abnormality has occurred.

In the second embodiment, the gas alarm 1a includes a green LED 60 and a red LED 70, but is not limited to this, for example, a green lamp (an example of another color light emitter), a white lamp, and a green lamp. A semitransparent resin cover (an example of a light emitter of another color) may be used to develop a green color. Similarly, the red LED 70 may be configured to be capable of developing a red color by using a red lamp, a white lamp, and a red translucent resin cover.

Further, in the second embodiment, the CPU 20 includes a light emitting selection unit 23 and a lighting prohibition unit 24.

The light emitting selection unit 23 has a function of selecting whether to light the white LED 40 or the green LED 60 when the abnormality determination unit 21 does not determine that an abnormality has occurred and power is being supplied. It is a department. The selection operation is performed, for example, by performing a specified operation on the switch 50 (such as pressing the switch 50 multiple times within a specified time), and the light emitting selection unit 23 performs a selection operation when the initial state is the selection state of the white LED 40. Then, the selection target is changed to the green LED 60, and when the selection operation is performed when the green LED 60 is in the selected state, the selection target is changed to the white LED 40.

The selection operation is not limited to the one via the switch 50, and may be performed by, for example, transmitting a selection signal from a smartphone, a dedicated device, or the like to the gas alarm 1a by wire or wirelessly. This makes it possible, for example, to operate a smartphone or the like owned by the user to select the white LED 40 or the green LED 60 as the selection target. In particular, by using a device having a screen and a touch panel such as a smartphone, it is possible to display the current selection target to the user or change the selection target by simply operating a predetermined part of the screen with one touch, which is convenient. It will be excellent in sex.

The lighting prohibition unit 24 prohibits the white LED 40 from being lit by the light emission control unit 22 in response to a specific operation (for example, a long press for a specific time or longer) on the switch 50 from the user. That is, the lighting prohibition unit 24 prohibits the lighting of the white LED 40 and invalidates the nightlight function. This makes it possible to improve convenience for users who do not want the gas alarm 1a to function as a nightlight.

In the state where the lighting of the white LED 40 is prohibited, the prohibition is released when a specific operation is performed by the user again. Further, the specific operation may be performed on the switch 50 in the same manner as described above, or may be performed on the smartphone or the dedicated device by wire or wirelessly.

In addition, when the nightlight function is disabled by the lighting prohibition unit 24, the light emission selection unit 23 is forced to be in the selection state of the green LED 60 and does not accept the specified operation for selecting the white LED 40. It may be.

FIG. 7 is a flowchart showing a control method of the gas alarm 1a according to the second embodiment. In the flowchart shown in FIG. 7, the same processing as that shown in FIG. 4 is designated by the same reference numerals and the description thereof will be omitted. Further, it is assumed that the process shown in FIG. 7 starts when the power of the gas alarm 1a is turned on and ends when the power is cut off.

As shown in FIG. 7, when the abnormality determination unit 21 determines that an abnormal state such as a gas leak or a high concentration abnormality of carbon monoxide is present (S2: YES), the light emission control unit 22 blinks the red LED 70. The CPU 20 outputs an alarm sound from the speaker 30 while executing the blinking control (S10).

Next, the CPU 20 determines whether the switch 50 has been short-pressed (S4), and when it determines that the switch 50 has been short-pressed (S4: YES), the light emission control unit 22 executes a lighting control for lighting the selection target. , The CPU 20 stops the alarm sound from the speaker 30. Then, this state is continued for a predetermined time (S11). After that, the process proceeds to step S1. Here, the selection target refers to one of the white LED 40 and the green LED 60 that is selected by the light emission selection unit 23. Further, when the nightlight function is disabled by the lighting prohibition unit 24, the selection target is the green LED 60.

On the other hand, when it is determined that the state is not abnormal (S2: NO), the light emission control unit 22 executes lighting control for lighting the selection target (S12). The selection target is the same as above. Next, the CPU 20 determines whether the white LED 40 is the selection target (S13). When it is determined that the white LED 40 is not the selection target (S13: NO), the process proceeds to step S1.

When it is determined that the white LED 40 is the selection target (S13: YES), the same processing as in steps S7 and S8 described with reference to FIG. 4 is executed.

In this way, according to the gas alarm 1a according to the second embodiment, it is possible to appropriately function as a nightlight and to darken or brighten the nightlight as in the first embodiment. .. In addition, the brightness change operation can be facilitated.

Further, according to the second embodiment, since the light emitting selection unit 23 that can select whether to turn on the white LED 40 or the green LED 60 is provided, the green LED 60 can be turned on, for example, as an energizing indicator light, or white as a nightlight. It becomes possible to select to turn on the LED 40. As a result, for example, it is possible to properly use the energized indicator light and the nightlight, and it is possible to make it more convenient.

Further, since the lighting prohibition unit 24 for prohibiting the lighting of the white LED 40 element by the light emission control unit 22 is further provided, it can be used as a normal alarm when the nightlight function is not required.

Next, a third embodiment of the present invention will be described. The alarm device according to the third embodiment is the same as that of the second embodiment, but some configurations and the like are different. Hereinafter, the differences from the second embodiment will be described.

FIG. 8 is a block diagram of the gas alarm 1b according to the third embodiment. As shown in FIG. 8, the gas alarm 1b according to the third embodiment is newly provided with an illuminance sensor 80. The illuminance sensor 80 outputs a signal corresponding to the external illuminance, and is composed of, for example, a photodiode and a current amplifier circuit integrated into one chip.

Further, in the third embodiment, the light emission control unit 22 is configured to change the light emission brightness of the white LED 40 that functions as a nightlight according to the illuminance based on the signal from the illuminance sensor 80. For example, the light emission control unit 22 increases the light emission brightness as the surroundings become darker to maintain an appropriate brightness, or lowers the light emission brightness as the surroundings become darker so as to make the difference between the ambient brightness and the light emission brightness the same. The brightness that a person perceives with respect to the gas alarm 1b can be made constant.

Further, the light emitting selection unit 23 according to the third embodiment selects the green LED 60 when the illuminance based on the signal from the illuminance sensor 80 is higher than the predetermined value, and the illuminance based on the signal from the illuminance sensor 80 is equal to or less than the predetermined value. In the case of, the white LED 40 is selected. As a result, the gas alarm 1b automatically exerts the nightlight function when it is dark, and automatically displays the energization indicator light when it is bright.

FIG. 9 is a flowchart showing a control method of the gas alarm 1b according to the third embodiment. In the flowchart shown in FIG. 9, the same processing as that shown in FIG. 7 is designated by the same reference numerals and the description thereof will be omitted. Further, it is assumed that the process shown in FIG. 9 starts when the power of the gas alarm 1b is turned on and ends when the power is cut off.

First, in the gas alarm 1b according to the third embodiment, the CPU 20 inputs a signal from the illuminance sensor 80 (S14). Next, the light emission selection unit 23 determines whether the illuminance based on the signal input in step S14 is equal to or less than a predetermined value (S15). When it is determined that the value is equal to or less than the predetermined value (S15: YES), the light emission selection unit 23 selects the white LED 40 (S16). Then, the process proceeds to step S18.

On the other hand, when it is determined that the illuminance based on the signal input in step S14 is not equal to or less than a predetermined value (S15: NO), the light emission selection unit 23 selects the green LED 60 (S17). Then, the process proceeds to step S1.

In step S18, the light emission control unit 22 sets the light emission brightness of the white LED 40 in advance according to the illuminance based on the signal input in step S14 (S18). After that, when it is determined by the abnormality determination unit 21 that there is no abnormal state (S2: NO) after the process of step S1, the light emission control unit 22 controls the lighting of the selection target (S12). In this process, the light emission control unit 22 turns on the green LED 60 when the green LED 60 is selected in step S17, and white with the brightness set in step S18 when the white LED 40 is selected in step S16. Turn on the LED 40.

In this way, according to the gas alarm 1b according to the third embodiment, it is possible to appropriately function as a nightlight and to darken or brighten the nightlight as in the second embodiment. .. Further, for example, it is possible to use the energized indicator light and the nightlight properly, which makes it more convenient, and when the nightlight function is not required, it can be used as a normal alarm.

Further, according to the third embodiment, since the brightness of the white LED 40 is changed according to the external illuminance, the emission brightness is increased as the surroundings become darker to maintain an appropriate brightness, or the ambient brightness and the emission brightness are maintained. It is possible to make the brightness perceived by the gas alarm 1b constant by lowering the emission brightness as the surroundings become darker so as to make the difference between the above and the same.

Further, since the green LED 60 is selected when the external illuminance is higher than the predetermined value and the white LED 40 is selected when the detected illuminance is equal to or less than the predetermined value, for example, when the light is turned off at night, it is automatically selected. It can function as a nightlight, and if not, it can be turned on as a normal energizing indicator.

Next, a fourth embodiment of the present invention will be described. The alarm device according to the fourth embodiment is the same as that of the third embodiment, but some configurations and the like are different. Hereinafter, the differences from the first embodiment will be described.

FIG. 10 is a block diagram of the gas alarm 1c according to the fourth embodiment. As shown in FIG. 10, the gas alarm 1c according to the fourth embodiment includes an illuminance sensor 80 and a motion sensor 90, as well as a green LED 60 and a red LED 70, in addition to those of the first embodiment. .. The illuminance sensor 80, the green LED 60, and the red LED 70 are the same as those described in the second and third embodiments. The motion sensor 90 is composed of, for example, an infrared sensor using a pyroelectric element, detects infrared rays emitted from a human body existing within the detection range, and outputs a detection signal.

Further, in the fourth embodiment, the light emission control unit 22 is not determined by the abnormality determination unit 21 that an abnormality has occurred, and a person is within the detection range by the motion sensor 90 while power is being supplied. When detected, the white LED 40 is turned on. That is, in the fourth embodiment, the light emission control unit 22 does not determine that an abnormality has occurred by the abnormality determination unit 21, and no person is detected in the detection range even when power is being supplied. In that case, the white LED 40 is not turned on. As a result, when there is no person in the detection range and there is no profit even if the nightlight function is exerted, the white LED 40 is not emitted to save power.

Further, in the fourth embodiment, it is preferable that the light emission control unit 22 takes into account not only the signal from the motion sensor 90 but also the signal from the illuminance sensor 80. That is, in the fourth embodiment, it is preferable that the light emission control unit 22 further lights the white LED 40 when the illuminance based on the signal from the illuminance sensor 80 is equal to or less than a predetermined value. As a result, when the light emission control unit 22 does not determine that an abnormality has occurred by the abnormality determination unit 21 and a person is detected in the detection range by the motion sensor 90 while power is being supplied. Even so, when the illuminance exceeds a predetermined value and is bright, the white LED 40 is not turned on. Therefore, when the surroundings are bright and the need to exert the nightlight function is small, the white LED 40 is prevented from emitting light to further reduce power consumption.

When the light emission control unit 22 determines that the white LED 40 is not turned on based on the signals from the motion sensor 90 and the illuminance sensor 80, the green LED 60 may be turned on or turned off.

FIG. 11 is a flowchart showing a control method of the gas alarm 1c according to the fourth embodiment. In the flowchart shown in FIG. 11, the same processing as that shown in FIG. 4 is designated by the same reference numerals and the description thereof will be omitted. Further, it is assumed that the process shown in FIG. 11 starts when the power of the gas alarm 1c is turned on and ends when the power is cut off.

First, in the gas alarm 1c according to the fourth embodiment, the CPU 20 inputs a signal from the motion sensor 90 (S19). Next, the CPU 20 inputs a signal from the illuminance sensor 80 (S20).

Next, the light emission selection unit 23 determines whether the illuminance is equal to or less than a predetermined value and a person is present in the detection range based on the signals input in steps S19 and S20 (S21). When the illuminance is equal to or less than a predetermined value and it is determined that a person exists in the detection range (S21: YES), the light emission control unit 22 turns on the nightlight (S22). As a result, the white LED 40 functions as a nightlight in the power supply state without the occurrence of an abnormal state. Then, the process proceeds to step S1.

On the other hand, when it is determined that the illuminance is not less than a predetermined value or there is no person in the detection range (S21: NO), the light emission control unit 22 sets the nightlight to off (S23). As a result, the white LED 40 does not function as a nightlight in the power supply state without the occurrence of an abnormal state. Then, the process proceeds to step S1.

Further, when the abnormality determination unit 21 determines that the condition is abnormal (S2: YES), and after the red LED 70 is blinked (after S10), the switch 50 is briefly pressed (S4: YES), the light is emitted. The control unit 22 determines whether the nightlight is being set to ON (S24). When it is determined that the nightlight is being set to be on (S24: YES), the light emission control unit 22 executes lighting control for lighting the white LED 40, and the CPU 20 stops the alarm sound from the speaker 30. Then, this state is continued for a predetermined time (S25). After that, the process proceeds to step S19.

On the other hand, when it is determined that the nightlight is not set to be on (S24: NO), the light emission control unit 22 executes the lighting control for lighting the green LED 60, and the CPU 20 stops the alarm sound from the speaker 30. Then, this state is continued for a predetermined time (S26). After that, the process proceeds to step S19.

When the abnormality determination unit 21 determines that the condition is not abnormal (S2: NO), the light emission control unit 22 determines whether the nightlight is on (S27). When it is determined that the nightlight is being set to be on (S27: YES), the light emission control unit 22 executes lighting control for lighting the white LED 40 (S28). After that, the process proceeds to step S19.

On the other hand, when it is determined that the nightlight is not set to be on (S27: NO), the light emission control unit 22 executes lighting control for lighting the green LED 60 (S29). After that, the process proceeds to step S19.

In this way, according to the gas alarm 1c according to the fourth embodiment, it is possible to appropriately function as a nightlight as in the first embodiment.

Further, according to the fourth embodiment, when a person is detected in the detection range in a state where it is not determined that an abnormality has occurred and power is being supplied, the white LED 40 is turned on. When there is no person in the detection range and there is no profit even if the nightlight function is exerted, the white LED 40 can be prevented from emitting light to save power.

Further, when it is not determined that an abnormality has occurred and a person is detected in the detection range and the detected illuminance is equal to or less than a predetermined value in a state where power is supplied, the white LED 40 is turned on. In order to turn on the light, not only when there is no person in the detection range and there is no profit even if the nightlight function is exerted, but also when the surroundings are bright and there is little need to exert the nightlight function, the white LED 40 is not made to emit light. Further power saving can be achieved.

Although the present invention has been described above based on the embodiments, the present invention is not limited to the above embodiments, and changes may be made without departing from the spirit of the present invention, and other modifications may be made as appropriate to the extent possible. Techniques may be combined. Furthermore, all or part of the techniques of the embodiments may be combined.

For example, existing gas alarms are equipped with inspection means that perform self-inspection (inspection of sensors, LEDs, speakers, their drive circuits, etc.) in response to a predetermined operation (short press) on the switch. Often. In the present embodiment, it is preferable that the self-inspection is executed by pressing and holding for a predetermined time or longer, and the inspection operation and the brightness change operation are distinguished from each other.

Further, in the above embodiment, the white LED 40 may be provided with a difference in the emission brightness so that the white LED 40 can realize the functions of both the energizing indicator light and the nightlight. In addition, the switch 50 and the cover switch 5 are not limited to one, and either one or both may be configured by a plurality.

In addition, the gas alarm 1 shown in FIG. 1 is capable of emitting light as a nightlight in the upper left when viewed from the front, but in an alarm provided near the floor, for example, a gas alarm for LP gas. May function as a foot lamp by lighting the underside of the alarm as a nightlight.

12A and 12B are external views showing an example of a gas alarm for LP gas, where FIG. 12A is a front view and FIG. 12B is a side view. As shown in FIG. 12A, the gas alarm 1e for LP gas has a structure in which various elements are covered with a housing 2 which is a resin case, similar to that shown in FIG. .. On the front surface of the housing 2, a detection unit 3 having a gas sensor 10 inside, a notification unit 4 having a speaker 30 for alarm output inside, and an operation unit 6 capable of operating the switch 50 are formed. .. In addition, a white, transparent or translucent resin cover 7 is provided in the lower part of the housing 2, and a white LED 40, a green LED 60 and a red LED 70 are built in the resin cover 7.

As shown in FIG. 12B, in such a gas alarm 1e for LP gas, the optical axis of the white LED 40 is slightly forward side when mounted on the wall surface near the floor. Therefore, the gas alarm 1e for LP gas can illuminate the front area of the floor and can function as a foot lamp. Instead of setting the optical axis of the white LED 40 downward and slightly forward, the resin cover 7 may be configured to direct the light irradiation direction downward and slightly forward. The alarm device installed at a high position, such as a gas alarm device for city gas or a fire alarm device, has no limitation on the light emitting direction of the white LED 40, and may irradiate light in any direction.

Further, in the above embodiment, the white LED 40 is composed of two, the first LED 41 and the second LED 42, but the present invention is not limited to this, and one or three or more may be used. Further, when a plurality of white LEDs 40 are provided, light can be emitted over a wide range by directing the optical axes of the LEDs in two or more directions. Further, the member provided on the front side of the white LED 40 such as the cover switch 5 may be provided with a diffusion function or a predetermined light guide function to emit light over a wide range.

1,1a, 1b, 1c: Gas alarm 2: Housing 4: Notification unit 5: Cover switch (cover member, light emitting unit)
10: Gas sensor 20: CPU
21: Abnormality determination unit 22: Light emission control unit 23: Light emission selection unit 24: Lighting prohibition unit 40: White LED (white light emitting body, light emitting unit)
50: Switch 60: Green LED (other color light emitter)
70: Red LED
80: Illuminance sensor 90: Motion sensor

Claims (6)

A sensor unit that outputs a signal according to the surrounding environment, an abnormality determination unit that determines whether an abnormality has occurred in the surroundings based on the signal from the sensor unit, and an abnormality determination unit that determines that an abnormality has occurred. An alarm device equipped with a light emitting control unit that blinks the light emitting unit when it is determined.
Equipped with an illuminance sensor that outputs a signal according to the external illuminance
The light emitting unit includes a white light emitting body that emits white light, a white, transparent or translucent cover member provided on the front side of the white light emitting body, and another color light emitting body that develops a color different from the white light emitting body. including the door,
When the abnormality determination unit does not determine that an abnormality has occurred and the illuminance based on the signal from the illuminance sensor is higher than a predetermined value in a state where power is being supplied, the other color light emitter is used. Further provided with a light emitting selection unit that selects to turn on and selects to turn on the white light emitter when the illuminance based on the signal from the illuminance sensor becomes a predetermined value or less.
In the light emission control unit, when the illuminance based on the signal from the illuminance sensor is equal to or less than a predetermined value and the white light emitting body is selected to be turned on by the light emission selection unit, an abnormality occurs by the abnormality determination unit. An alarm that is not determined to be turned on and that the white light emitter is turned on while power is being supplied. The alarm device according to claim 1, wherein the light emission control unit is capable of changing the light emission brightness of the white light emitter. The alarm device according to claim 2, wherein the light emission control unit changes the brightness of the white light emitter according to the illuminance based on the signal from the illuminance sensor. With additional user-operable switches
The light emission control unit changes the light emission brightness of the white light emitter each time there is a specific operation on the switch.
The alarm device according to claim 2, wherein the switch is operated by pressing the cover member. The alarm device according to claim 1, further comprising a lighting prohibition unit that prohibits the lighting of the white light emitting body by the light emission control unit in response to a specific operation from the user. Further equipped with a motion sensor that detects people in the detection range,
The light emission control unit, when a person is detected in the detection range by the human sensor, alarm as claimed in claim 1, characterized in that turning on the white light-emitting body.

Images