Alarm device

Abstract

To provide a warning device capable of reducing a cost while keeping a state where information can be communicated between a communication section and an external section even when power supply from a commercial power supply is interrupted.SOLUTION: A warning device comprises: an abnormality detection sensor 2 for detecting an abnormality in the periphery; a communication section 3 for communicating information with an external section 12; a power supply section 5 for supplying power from a commercial power supply 4 to the abnormality detection sensor 2 and the communication section 3; an exchange object unit 14 including the abnormality detection sensor 2; and a separate unit 15 not including the abnormality detection sensor 2. The power supply section 5 includes: a first supply section 21 for supplying power from the commercial power supply 4 to the separate unit 15; and a second supply section 22 for supplying power from the separate unit 15 to the exchange object unit 14. The separate unit 15 includes: a communication section 3; and a battery 9 for supplying power to the communication section 3 when the power supply from the commercial power supply 4 is interrupted.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an alarm device comprising an abnormality detection sensor that detects abnormalities in the surrounding area, a communication unit that communicates information with the outside, and a power supply unit that supplies power from a commercial power source to the abnormality detection sensor and the communication unit. [Background technology]

[0002] Patent Document 1 shows an alarm mounting device 10 for mounting an alarm to an installation surface such as a ceiling surface. This alarm mounting device 10 is equipped with a sensor 50 that receives an alarm signal from the alarm, a power supply unit such as a battery, a communication unit (transmitter) that transmits a communication signal to an external receiver, and a control unit that controls the transmitter. The alarm mounting device 10 of Patent Document 1 is configured so that when the alarm sounds, the sensor 50 receives the change in the magnetic field that occurs when the alarm sounds as an alarm signal, and the control unit controls the transmitter to transmit a communication signal to the outside when an alarm signal is received by the sensor 50. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2012-141835 A Summary of the Invention [Problem to be solved by the invention]

[0004] The alarm mounting device 10 of Patent Document 1 supplies power from a battery to the control unit and transmission unit, but these control unit and transmission unit may consume a lot of power, so the life of the power supply unit is short, and the alarm mounting device 10 needs to be replaced early. The same can be said for the alarm, where power consumption is high and early replacement is required. For this reason, it is conceivable to provide a power supply unit that supplies power from a commercial power source to each of the alarm mounting device 10 and the alarm, thereby eliminating the need to replace both the alarm mounting device 10 and the alarm due to the end of their power supply units' lifespans. However, providing a power supply unit that supplies power from a commercial power source to both in this way increases costs. Also, if power is no longer supplied from the commercial power source, such as in the event of a power outage or when the power supply unit is unplugged from the outlet, power is no longer supplied to the communication unit, and this causes a problem in that the communication unit is no longer able to communicate information with the outside.

[0005] In view of this situation, the main object of the present invention is to provide an alarm device that can reduce costs while maintaining the ability to communicate information between a communication unit and the outside even when the power supply from the commercial power source is cut off. [Means for solving the problem]

[0006] A first characteristic configuration of the present invention is an alarm device including an abnormality detection sensor that detects abnormalities in the surroundings, a communication unit that communicates information with the outside, and a power supply unit that supplies power from a commercial power source to the abnormality detection sensor and the communication unit, A replacement target unit including the abnormality detection sensor and another unit not including the abnormality detection sensor, the power supply unit includes a first supply unit that supplies power from the commercial power source to one of the replacement target unit and the other unit, and a second supply unit that supplies power from one of the replacement target unit and the other unit to the other unit; The separate unit includes the communication unit and a battery that supplies power to the communication unit when the supply of power from the commercial power source is cut off.

[0007] According to this configuration, by replacing the unit to be replaced with a new one before the service life of the anomaly detection sensor expires, the anomaly detection sensor provided in the unit to be replaced can also be replaced with a new one. Furthermore, since the communication unit and the power supply unit are provided in a separate unit and not in the unit to be replaced, the communication unit and the power supply unit are not replaced when the unit to be replaced is replaced, so the cost of replacing the anomaly detection sensor can be reduced compared to replacing the entire alarm device. Furthermore, the power supplied from the commercial power source to one of the replacement target unit and the other unit by the first supply unit can be supplied from one of the replacement target unit and the other unit to the other unit by the second supply unit. Therefore, even if there are no separate power supply units for the replacement target unit and the other unit, power can be supplied to both the abnormality detection sensor of the replacement target unit and the communication unit of the other unit, which reduces costs compared to when separate power supply units are provided. The separate unit is equipped with a communication unit and a battery, and even if the power supply from the power supply unit to the communication unit is cut off, power can be supplied from the battery to the communication unit, making it possible to communicate information between the communication unit and the outside. In this way, it is possible to provide an alarm device that can reduce costs while still maintaining a state in which information can be communicated between the communication unit and the outside even when the power supply from the commercial power source is cut off.

[0008] A second characteristic configuration of the present invention is a method for replacing a unit comprising the steps of: (a) providing a replacement unit to a vehicle having a plurality of replacement units; The communication unit and the battery are provided in the base unit.

[0009] According to this configuration, by providing the communication unit and the battery in the base unit, the base unit can be used to house the communication unit and the battery. In addition, by fixing the base unit to the object to which the device is to be attached, the communication unit and the battery provided in the base unit can also be fixed to the object to which the device is to be attached.

[0010] A third characteristic configuration of the present invention is a power supply unit configured to supply power from the commercial power source to the base unit, The second supply unit is configured to supply power from the base unit to the replacement target unit.

[0011] According to this configuration, the first supply unit supplies power from a commercial power source to the base unit, and power is supplied to the communication unit provided in the base unit. Also, the second supply unit supplies power from the base unit to the unit to be replaced, and power is supplied to the abnormality detection sensor provided in the unit to be replaced. Then, even if the unit to be replaced is removed from the base unit, the supply of power to the base unit by the first supply unit can be maintained. Therefore, even when the unit to be replaced is replaced, the supply of power to the communication unit by the power supply unit can be maintained. Furthermore, even if the supply of power to the base unit by the first supply unit is cut off for some reason, the supply of power to the communication unit can be maintained by the battery.

[0012] A fourth characteristic configuration of the present invention is a first supply unit configured to supply power from the commercial power source to the replacement target unit, The second supply unit is configured to supply power from the replacement target unit to the base unit.

[0013] According to this configuration, the first supply unit supplies power from a commercial power source to the unit to be replaced, and power is supplied to an abnormality detection sensor provided in the unit to be replaced. The second supply unit supplies power from the unit to be replaced to the base unit, and power is supplied to the communication unit provided in the base unit. When the unit to be replaced is removed from the base unit, the supply of power to the base unit by the second supply unit is cut off, but the supply of power to the communication unit can be maintained by the battery. Furthermore, even if the supply of power to the base unit by the first supply unit and the second supply unit is cut off for some reason, the supply of power to the communication unit can be maintained by the battery.

[0014] A fifth characteristic configuration of the present invention is that the unit to be replaced is equipped, in addition to the abnormality detection sensor, with a resistor section whose resistance value changes depending on the ambient temperature, and a control section that determines whether or not an abnormality has occurred in the surroundings based on the resistance value of the resistor section and the detection information of the abnormality detection sensor.

[0015] According to this configuration, the control unit determines whether or not an abnormality has occurred in the surroundings by taking into account the resistance value of the resistor part, which changes depending on the surrounding temperature, making it easier for the control unit to appropriately determine whether or not an abnormality has occurred in the surroundings based on detection by the abnormality detection sensor. Furthermore, by equipping the unit to be replaced with a resistance section and a control section that perform temperature control, etc. in response to the abnormality detection sensor, when the unit to be replaced is replaced, there is no need for the base section to accommodate the abnormality detection sensor of the new unit to be replaced, making it easier to share the use of the base section.

[0016] A sixth characteristic configuration of the present invention is that the separate unit includes, in addition to the communication unit and the battery, a resistor unit whose resistance value changes depending on the ambient temperature, and a control unit that corrects the information detected by the abnormality detection sensor based on the resistance value of the resistor unit.

[0017] According to this configuration, the control unit determines whether or not an abnormality has occurred in the surroundings by taking into account the resistance value of the resistor part, which changes depending on the surrounding temperature, making it easier for the control unit to appropriately determine whether or not an abnormality has occurred in the surroundings based on detection by the abnormality detection sensor. In addition, since the resistance unit and the control unit are provided in a separate unit and not in the unit to be replaced, the resistance unit and the control unit are not replaced when the unit to be replaced is replaced, which further reduces the cost of replacing the abnormality detection sensor. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is a diagram showing a state in which a replacement target unit is attached to another unit in the first embodiment; [Diagram 2] FIG. 1 is a diagram showing a state in which power from a commercial power source is cut off in the first embodiment; [Diagram 3] FIG. 1 is a diagram showing a state in which a replacement target unit is detached from another unit in the first embodiment; [Figure 4] FIG. 13 is a diagram showing a state in which a replacement target unit is attached to another unit in the second embodiment. [Diagram 5] FIG. 13 is a diagram showing a state in which a replacement target unit is attached to another unit in the third embodiment. [Figure 6] FIG. 13 is a diagram showing a state in which a replacement target unit is attached to another unit in the fourth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] [First embodiment] A first embodiment of an alarm device according to the present invention will be described with reference to the drawings. As shown in FIG. 1, the alarm device 1 includes an abnormality detection sensor 2 that detects abnormalities in the surrounding area, a communication unit 3 that communicates information with the outside 12, and a power supply unit 5 that supplies power from a commercial power source 4 to the abnormality detection sensor 2 and the communication unit 3.

[0020] The alarm device 1 also includes an alarm unit 6 that issues an alarm when an abnormality occurs, a temperature compensating thermistor 7 whose resistance value changes depending on the ambient temperature, a control unit 8 that corrects information detected by the abnormality detection sensor 2 based on the resistance value of the temperature compensating thermistor 7, and a battery 9 that supplies power to at least the communication unit 3 when the supply of power from the commercial power source 4 is cut off. In this embodiment, the battery 9 is configured to supply power to the abnormality detection sensor 2, the alarm unit 6, the temperature compensating thermistor 7, and the control unit 8 in addition to the communication unit 3. The power supply unit 5 is configured to supply power from the commercial power source 4 to the abnormality detection sensor 2, the alarm unit 6, the temperature compensating thermistor 7, and the control unit 8 in addition to the abnormality detection sensor 2 and the communication unit 3.

[0021] In this embodiment, the target gas is a hydrocarbon gas such as city gas or propane gas, and when the concentration of the target gas around the alarm device 1 becomes equal to or exceeds a set value, it is determined that an abnormality has occurred around the alarm device 1. The abnormality detection sensor 2 is configured to be able to detect the concentration of the target gas around the alarm device 1, and is configured to detect the target gas with a concentration equal to or above the set value, in other words, to detect an abnormality in the surroundings, when the concentration of the target gas around the alarm device 1 becomes equal to or above a set value and an abnormality has occurred around the alarm device 1. The conditions for determining that an abnormality has occurred in the surroundings may be changed as appropriate, such as by changing the target gas to something other than a hydrocarbon gas, etc. For example, an abnormality may be determined to have occurred in the surroundings when the concentration of carbon monoxide exceeds a set value, when the concentration of a flammable gas such as isobutane exceeds a set value, when the concentration of oxygen falls below a set value, or when smoke or heat is generated due to a fire.

[0022] The notification unit 6 includes an illumination unit that issues an alarm by illuminating with an LED or the like and a speaker that issues an alarm by emitting an alarm sound. The control unit 8 is configured to determine whether or not an abnormality has occurred around the alarm device 1 based on the detection information from the abnormality detection sensor 2, and not to operate the notification unit 6 if it is determined that no abnormality has occurred around the alarm device 1, and to operate the notification unit 6 to issue an alarm if it is determined that an abnormality has occurred around the alarm device 1.

[0023] The temperature compensating thermistor 7 corresponds to a resistor whose resistance value changes according to the surrounding temperature. The control unit 8 determines whether or not an abnormality has occurred in the surroundings based on the resistance value of the temperature compensating thermistor 7 and the detection information of the abnormality detection sensor 2. In this embodiment, the temperature compensating thermistor 7 is used to compensate for errors due to the temperature dependency of the output information of the abnormality detection sensor 2, and outputs temperature-compensated correction information based on the output information of the abnormality detection sensor 2 and its own resistance value. The control unit 8 is configured to determine whether or not an abnormality has occurred in the surroundings based on the correction information output from the temperature compensating thermistor 7, and is capable of responding to changes in the surrounding air temperature.

[0024] The communication unit 3 is configured to be able to communicate information with the outside 12 via the internet line 11. The outside 12 is an information terminal such as a server provided in a management center that manages the alarm device 1. The communication unit 3 is configured to transmit anomaly information indicating the occurrence of the anomaly to the outside 12 when the control unit 8 determines that an anomaly has occurred around the alarm device 1. Furthermore, when the remaining charge of the battery 9 is equal to or greater than the first set amount and falls to or less than the second set amount, the communication unit 3 transmits remaining charge information indicating that the remaining charge of the battery 9 is equal to or less than the second set amount to the outside 12. The first set amount is an amount of power that allows the communication unit 3 to transmit the remaining charge information to the outside 12 at least once, and the second set amount is an amount of power that is greater than the first set amount and allows the communication unit 3 to transmit the remaining charge information to the outside 12 at least multiple times. Also, although not shown in the figure, the base portion 17 is equipped with a detection portion that detects that the unit to be replaced 14 has been removed from the base portion 17, and the communication portion 3 is configured to transmit information indicating that the unit to be replaced 14 has been removed to the outside 12 when the detection portion detects that the unit to be replaced 14 has been removed from the base portion 17. Furthermore, the communication unit 3 is configured to receive the most recent disaster information, such as earthquake information indicating that an earthquake has occurred, when the outside 12 transmits the disaster information.

[0025] The alarm device 1 includes a replacement target unit 14 that includes the abnormality detection sensor 2, and a separate unit 15 that does not include the abnormality detection sensor 2. In this embodiment, the replacement target unit 14 includes a temperature compensation thermistor 7 and a control unit 8 in addition to the abnormality detection sensor 2. The separate unit 15 includes a communication unit 3, an alarm unit 6, and a battery 9.

[0026] The separate unit 15 includes a base portion 17 fixed to the mounting object 16 to which the alarm device 1 is to be attached. In this embodiment, the separate unit 15 includes a power supply line 18 in addition to the base portion 17. The communication unit 3, the notification unit 6, and the battery 9 are provided in the base portion 17 of the separate unit 15. The base portion 17 is fixed to the mounting object 16, which is a wall, using fastening members such as screws. The power supply line 18 has a plug (not shown) that connects to an outlet (not shown), and is configured to supply power from the commercial power source 4 to the base portion 17. The replacement target unit 14 is a unit that is replaced when it becomes necessary to replace the abnormality detection sensor 2, and is attached detachably to the base portion 17. Incidentally, when replacing the replacement target unit 14, it is possible to replace both the replacement target unit 14 and the separate unit 15 with new ones by removing the base portion 17 from the mounting object 16.

[0027] The power supply unit 5 includes a first supply unit 21 that supplies power from the commercial power source 4 to either the unit to be replaced 14 or the other unit 15, and a second supply unit 22 that supplies power from either the unit to be replaced 14 or the other unit 15 to the other unit. In this embodiment, the first supply unit 21 is configured to supply power from the commercial power source 4 to the base unit 17 of the other unit 15, and the second supply unit 22 is configured to supply power from the base unit 17 of the other unit 15 to the unit to be replaced 14.

[0028] The first supply unit 21 is composed of the above-mentioned power supply line 18 and a first current conducting unit 24 that is built into the base unit 17. The first supply unit 21 is configured to supply power from the commercial power source 4 to the inside of the base unit 17 via the power supply line 18, and to supply the power supplied to the inside of the base unit 17 to the communication unit 3 and the notification unit 6 via the first current conducting unit 24.

[0029] The second supply unit 22 is composed of a second current-carrying unit 25 that is disposed within the base unit 17, and a third current-carrying unit 26 that is disposed within the unit 14 to be replaced. 1, in a state where the replacement target unit 14 is attached to the base portion 17, the second current conducting portion 25 and the third current conducting portion 26 are connected, and the second supply portion 22 is configured to supply the power supplied to the base portion 17 by the first supply portion 21 to the replacement target unit 14 by the second current conducting portion 25 and the third current conducting portion 26, and to supply the power supplied into the replacement target unit 14 to the abnormality detection sensor 2, the temperature compensation thermistor 7, and the control portion 8 by the third current conducting portion 26. As shown in FIG. 3, in a state where the replacement target unit 14 is detached from the base portion 17, the second current conducting portion 25 and the third current conducting portion 26 are disconnected, and the second supply portion 22 no longer supplies power to the replacement target unit 14.

[0030] The base unit 17 is provided with a battery control unit 27 that controls the supply of power from the battery 9 to each unit including the communication unit 3. In this embodiment, the battery 9 and the battery control unit 27 are unitized to form a battery unit 28. As shown in Figs. 1 and 3, the battery control unit 27 is configured to control the supply of power from the battery 9 so that when power is being supplied from the commercial power source 4 by the power supply unit 5, the battery control unit 27 cuts off the supply of power from the battery 9 to each unit, and when power is not being supplied from the commercial power source 4 by the power supply unit 5 as shown in Fig. 2, the battery control unit 27 controls the communication unit 3 to transmit remaining amount information to the outside 12 when the remaining amount of the battery 9 is equal to or greater than a first set amount and equal to or less than a second set amount. The control of the supply of power from the battery 9 to each unit such as the communication unit 3 may be performed by the control unit 8, not limited to the battery control unit 27, or may be performed by a power supply control unit that is not unitized with the battery 9.

[0031] When the anomaly detection sensor 2 needs to be replaced because its service life has expired, as shown in FIG. 3, the replacement target unit 14 is removed from the base unit 17, and only the replacement target unit 14 is replaced among the replacement target unit 14 and the separate unit 15. By replacing only the replacement target unit 14 in this manner, the temperature compensation thermistor 7 and the control unit 8 are replaced together with the anomaly detection sensor 2, but the communication unit 3, the notification unit 6, the battery 9, and the power supply line 18 provided in the base unit 17 are not replaced. Therefore, the cost required to replace the anomaly detection sensor 2 can be reduced compared to the case of replacing the entire alarm device 1. In addition, as described above, even while the replacement target unit 14 is being removed from the base unit 17 and the anomaly detection sensor 2 is being replaced, power from the commercial power source 4 or the battery 9 is supplied to the communication unit 3 and the notification unit 6, so that information indicating that the replacement target unit 14 has been removed from the base unit 17 can be transmitted to the outside 12 by the communication unit 3, and disaster information from the outside 12 can be received by the communication unit 3 and the notification unit 6 can be operated based on the disaster information.

[0032] Second Embodiment Next, a second embodiment of an alarm device according to the present invention will be described with reference to the drawings. In describing the second embodiment, the configuration different from the alarm device 1 of the first embodiment will be mainly described, and a description of the same configuration will be omitted.

[0033] 4, in this embodiment, the replacement target unit 14 includes a sensor section 31 equipped with the abnormality detection sensor 2, and a power supply line 18. The power supply line 18 is connected to the sensor section 31 and configured to supply power from the commercial power source 4 to the sensor section 31 of the replacement target unit 14. The sensor section 31 is detachably attached to the base section 17. In addition to the abnormality detection sensor 2, the sensor section 31 includes a temperature compensation thermistor 7 and a control section 8.

[0034] In addition, in this embodiment, the first supply unit 21 is configured to supply power from the commercial power source 4 to the unit 14 to be replaced, and the second supply unit 22 is configured to supply power from the unit 14 to be replaced to the base unit 17 of the other unit 15.

[0035] The first supply unit 21 is composed of a power supply line 18 and a fourth current conducting unit 32 built into the sensor unit 31. The first supply unit 21 is configured to supply power from the commercial power source 4 to the inside of the sensor unit 31 of the unit to be replaced 14 via the power supply line 18, and to supply the power supplied to the inside of the sensor unit 31 to the abnormality detection sensor 2, the temperature compensating thermistor 7, and the control unit 8 via the fourth current conducting unit 32.

[0036] The second supply unit 22 is composed of a fifth conductive unit 33 that is provided within the sensor unit 31 of the unit 14 to be replaced, and a sixth conductive unit 34 that is provided within the base unit 17 of the separate unit 15. As shown in FIG. 4, in a state where the replacement target unit 14 is attached to the base portion 17, the fifth current conducting unit 33 and the sixth current conducting unit 34 are connected, and the second supply unit 22 is configured to supply the power supplied to the sensor unit 31 by the first supply unit 21 to the base portion 17 of the separate unit 15 by the fifth current conducting unit 33 and the sixth current conducting unit 34, and to supply the power supplied to the inside of the base portion 17 to the communication unit 3 and the notification unit 6 by the sixth current conducting unit 34. Although not shown, in a state where the sensor unit 31 is detached from the base portion 17, the fifth current conducting unit 33 and the sixth current conducting unit 34 are disconnected, and the second supply unit 22 no longer supplies power to the separate unit 15. In this state where the power supply unit 5 stops supplying power to each unit from the commercial power source 4, the battery control unit 27 controls the battery 9 to supply power to each unit.

[0037] When the anomaly detection sensor 2 needs to be replaced because its service life has expired, the sensor unit 31 is removed from the base unit 17, and only the unit 14 to be replaced is replaced among the unit 14 to be replaced (the power supply line 18 and the sensor unit 31) and the separate unit 15 (the base unit 17). By replacing only the unit 14 to be replaced in this manner, the temperature compensation thermistor 7, the control unit 8, and the power supply line 18 are replaced together with the anomaly detection sensor 2, but the communication unit 3, the notification unit 6, and the battery 9 provided in the base unit 17 are not replaced. Therefore, the cost required to replace the anomaly detection sensor 2 can be reduced compared to when the entire alarm device 1 is replaced. In addition, as described above, even while the unit 14 to be replaced is being removed from the base unit 17 and the anomaly detection sensor 2 is being replaced, power from the battery 9 is supplied to the communication unit 3 and the notification unit 6, so that information indicating that the unit 14 to be replaced has been removed from the base unit 17 can be transmitted to the outside 12 by the communication unit 3, and information from the outside 12 can be received by the communication unit 3 to operate the notification unit 6 based on the disaster information.

[0038] Third Embodiment Next, a third embodiment of an alarm device according to the present invention will be described with reference to the drawings. In describing the third embodiment, the configuration different from the alarm device 1 of the first embodiment will be mainly described, and a description of the same configuration will be omitted.

[0039] As shown in FIG. 5, in this embodiment, the power supply line 18 of the separate unit 15 is provided with an adapter 36, and the communication unit 3, the notification unit 6, and the battery 9 are provided in this adapter 36.

[0040] The first supply unit 21 is composed of an upstream supply unit 18A connected to the commercial power source 4 and a first current conducting unit 24 built into the adapter 36. The first supply unit 21 is configured to supply power from the commercial power source 4 into the adapter 36 via the upstream supply unit 18A of the power feed line 18, and to supply the power supplied into the adapter 36 to the communication unit 3 and the notification unit 6 via the first current conducting unit 24.

[0041] The second supply section 22 is composed of a supply downstream section 18B connected to the base section 17, a seventh conductive section 37 provided within the base section 17, and an eighth conductive section 38 provided within the unit 14 to be replaced. 5, when the replacement target unit 14 is attached to the base portion 17, the seventh current conducting portion 37 and the eighth current conducting portion 38 are connected, and the second supply portion 22 supplies the power supplied to the adapter 36 by the first supply portion 21 to the replacement target unit 14 via the supply downstream portion 18B, the seventh current conducting portion 37, and the eighth current conducting portion 38, and supplies the power supplied into the replacement target unit 14 to the abnormality detection sensor 2, the temperature compensation thermistor 7, and the control portion 8 via the eighth current conducting portion 38. Although not shown, when the replacement target unit 14 is removed from the base portion 17, the seventh current conducting portion 37 and the eighth current conducting portion 38 are disconnected, and the second supply portion 22 no longer supplies power to the replacement target unit 14.

[0042] When it is necessary to replace the anomaly detection sensor 2 because its useful life has expired, the unit 14 to be replaced is removed from the base part 17, and only the unit 14 to be replaced is replaced among the unit 14 to be replaced and the separate unit 15 (the base part 17 and the power supply line 18 (including the adapter 36)). By replacing only the unit 14 to be replaced in this manner, the temperature compensation thermistor 7, the control part 8, and the power supply line 18 are replaced along with the anomaly detection sensor 2, but the communication part 3, the alarm part 6, and the battery 9 provided in the power supply line 18 and the adapter 36 of the power supply line 18 are not replaced. Therefore, the cost required to replace the anomaly detection sensor 2 can be reduced compared to when the entire alarm device 1 is replaced. Furthermore, as described above, even while the replacement target unit 14 is being removed from the base portion 17 and the abnormality detection sensor 2 is being replaced, power is supplied to the communication unit 3 and the alarm unit 6 from the commercial power source 4 or battery 9, so that information indicating that the replacement target unit 14 has been removed from the base portion 17 can be transmitted to the outside 12 via the communication unit 3, and disaster information from the outside 12 can be received via the communication unit 3 and the alarm unit 6 can be activated based on the disaster information.

[0043] [Fourth embodiment] Next, a fourth embodiment of an alarm device according to the present invention will be described with reference to the drawings. In describing the fourth embodiment, the configurations different from those of the alarm device 1 of the first embodiment will be mainly described, and a description of the same configurations will be omitted.

[0044] 6, in this embodiment, the replacement target unit 14 includes only the abnormality detection sensor 2 out of the abnormality detection sensor 2, the temperature compensating thermistor 7, and the control unit 8. Meanwhile, the separate unit 15 includes the temperature compensating thermistor 7 and the control unit 8 in addition to the communication unit 3 and the battery 9.

[0045] The first supply unit 21 is composed of a power supply line 18 and a ninth current conducting unit 40 that is built into the base unit 17. The first supply unit 21 is configured to supply power from the commercial power source 4 to the inside of the base unit 17 via the power supply line 18, and to supply the power supplied to the inside of the base unit 17 to the communication unit 3, the notification unit 6, the temperature compensating thermistor 7, and the control unit 8 via the ninth current conducting unit 40.

[0046] The second supply unit 22 is composed of a tenth current conducting unit 41 that is disposed within the base unit 17 and an eleventh current conducting unit that is disposed within the unit 14 to be replaced. 1, in a state where the replacement target unit 14 is attached to the base portion 17, the tenth current conducting unit 41 and the eleventh current conducting unit 42 are connected, and the second supply unit 22 is configured to supply the power supplied to the base portion 17 by the first supply unit 21 to the replacement target unit 14 by the tenth current conducting unit 41 and the eleventh current conducting unit 42, and to supply the power supplied into the replacement target unit 14 to the abnormality detection sensor 2 by the eleventh current conducting unit 42. In a state where the replacement target unit 14 is detached from the base portion 17, the tenth current conducting unit 41 and the eleventh current conducting unit 42 are disconnected, and the second supply unit 22 no longer supplies power to the replacement target unit 14.

[0047] When the anomaly detection sensor 2 needs to be replaced because its service life has expired, the replacement target unit 14 is removed from the base unit 17, and only the replacement target unit 14 is replaced between the replacement target unit 14 and the separate unit 15. By replacing only the replacement target unit 14 in this manner, the anomaly detection sensor 2 is replaced, but the communication unit 3, the notification unit 6, the temperature compensation thermistor 7, the control unit 8, the battery 9, and the power supply line 18 provided in the base unit 17 are not replaced. Therefore, the cost required to replace the anomaly detection sensor 2 can be reduced compared to replacing the entire alarm device 1. In addition, as described above, even while the replacement target unit 14 is being removed from the base unit 17 and the anomaly detection sensor 2 is being replaced, power is supplied from the commercial power source 4 or the battery 9 to the communication unit 3 and the notification unit 6, so that information indicating that the replacement target unit 14 has been removed from the base unit 17 can be transmitted to the outside 12 by the communication unit 3, and disaster information from the outside 12 can be received by the communication unit 3 and the notification unit 6 can be operated based on the disaster information.

[0048] [Another embodiment] Other embodiments of the present invention will be described below. Note that the configurations of the embodiments described below are not limited to being applied alone, but may also be applied in combination with the configurations of other embodiments.

[0049] (1) In the above embodiment, the alarm device 1 is provided with the base unit 17. However, the alarm device 1 may not be provided with the base unit 17, for example, by directly attaching the replacement target unit 14 to the attachment target object 16 in a detachable manner. In this case, for example, the power supply line 18 may be detachably connected to the replacement target unit 14, and the communication unit 3, the notification unit 6, and the battery 9 may be provided in the adapter 36 of the power supply line 18.

[0050] (2) In the above embodiment, a configuration in which a temperature-compensated thermistor 7 is used as the resistance portion has been described as an example. However, the resistance portion may be something other than a temperature-compensated thermistor, such as a linear resistor or a sensor using a platinum resistance temperature detector. Then, the detection information of the abnormality detection sensor 2 and the resistance value of the resistance portion may be input to the control portion 8, and the control portion 8 may perform a temperature-compensated determination based on this information. [Explanation of symbols]

[0051] 1 Alarm device 2. Abnormality detection sensor 3. Communications Department 4 Commercial power supply 5 Power supply section 7 Temperature compensation thermistor (resistance part) 8. Control Unit 9. Battery 12 External 14 Replacement unit 15 Separate Unit 16 Mounting object 17 Base 21 1st supply section 22 2nd supply section

Claims

1. An alarm device comprising an abnormality detection sensor for detecting an abnormality in the surroundings, a communication unit for communicating information with the outside, and a power supply unit for supplying power from a commercial power source to the abnormality detection sensor and the communication unit, A replacement target unit including the abnormality detection sensor and another unit not including the abnormality detection sensor, the power supply unit includes a first supply unit that supplies power from the commercial power source to one of the replacement target unit and the other unit, and a second supply unit that supplies power from one of the replacement target unit and the other unit to the other unit; the separate unit includes the communication unit and a battery that supplies power to the communication unit when the supply of power from the commercial power source is cut off; The separate unit includes a base portion fixed to an object to which the unit is to be attached, and the replacement target unit is detachably attached to the base portion, the communication unit and the battery are provided on the base unit, The first supply unit is configured to supply power from the commercial power source to the replacement target unit, The second supply unit is configured to supply power from the unit to be replaced to the base unit.

2. The alarm device described in claim 1, wherein the unit to be replaced includes, in addition to the abnormality detection sensor, a resistor section whose resistance value changes depending on the ambient temperature, and a control section that determines whether or not an abnormality has occurred in the surroundings based on the resistance value of the resistor section and the detection information of the abnormality detection sensor.

3. 3. The alarm device according to claim 1 or 2, wherein the separate unit includes, in addition to the communication unit and the battery, a resistor unit whose resistance value changes depending on the ambient temperature, and a control unit that determines whether or not an abnormality has occurred in the surroundings based on the resistance value of the resistor unit and detection information from the abnormality detection sensor.

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