JP2019152601A - Battery driven apparatus - Google Patents

Abstract

To provide a battery driven apparatus whose power consumption is small and which is inexpensive.SOLUTION: Provided is a battery driven apparatus in which a display unit includes a heat sensitizer 10 and electric conductors 11c, 12c. A discoloration pattern of prescribed design appearing on the heat sensitizer 10 changes in order while transition occurs between a first state that is an unused state where electricity to neither the first electric conductor 11c nor the second electric conductor 12c is turned on, a second state where as the state changes from the unused state to a used state, electricity to the first electric conductor 11c is turned on and electricity to the second electric conductor 12c is not turned on, and a third state where as the remaining capacity of a battery drops to a lower limit value after entering the used state, electricity to the second electric conductor 12c is also turned on.SELECTED DRAWING: Figure 3

Description

  The present invention includes a battery that supplies power, an operation unit that operates by consuming power supplied from the battery, and a display unit that can change information to be displayed by consuming power supplied from the battery. The present invention relates to a battery-driven device having a housing.

  Patent Document 1 (Japanese Patent Laid-Open No. 10-283582) describes a battery-driven alarm device. As an advantage of such a battery-powered alarm device, it can be applied when it is required to install an alarm device at an installation location where connection wiring with a commercial AC power source is difficult or an installation location that values aesthetics is important. This is the point.

  Although the battery-driven device has an advantage that the degree of freedom of the installation location is increased, the battery capacity is limited, so that it is required to reduce power consumption. In particular, a lamp such as an LED that is often used in a display unit that displays various information has a problem that power consumption is large when mounted on a battery-driven device.

  For this reason, a magnetic reversal display as described in Patent Document 2 (Japanese Utility Model Publication No. 59-20281) may be used. This magnetic reversal type display has a display disk supported so as to be reversed, a permanent magnet provided so as to be able to be reversed together with the display disk around the reversal axis of the display disk, and opposed to the permanent magnet. And an electromagnet device that can reverse the polarity. Then, a current is passed through the coil of the electromagnet device to reverse the polarity of the magnetic pole, and the display is changed by inverting the permanent magnet and the display disk around the inverting axis. Thus, the magnetic reversal type display has the advantage that it does not consume power except during the reversal operation.

Japanese Patent Laid-Open No. 10-283582 Japanese Utility Model Publication No. 59-20281

  However, the magnetic reversal type display described in Patent Document 2 has a problem that it is expensive because it uses a permanent magnet.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a battery-driven device that consumes less power and is inexpensive.

In order to achieve the above object, the characteristic configuration of the battery-driven device according to the present invention includes a battery for supplying power,
An operation unit that operates by consuming electric power supplied from the battery;
A battery-driven device that consumes electric power supplied from the battery and includes a display unit that can change information to be displayed in a housing,
The display unit includes a heat-sensitive material that changes color due to heat and a conductor that can be supplied with electric power from the battery, and the heat-sensitive material is predetermined by Joule heat generated by energizing the conductor. The discoloration pattern of the pattern of
The conductor includes a first conductor that is energized when power is supplied from the battery to change from an unused state to a use state, and a remaining capacity of the battery after the use state is predetermined. Having a second conductor that is energized when it falls to the lower limit of
The discoloration pattern of the predetermined pattern appearing on the heat sensitive material is
A first state where both the first conductor and the second conductor are not energized in the unused state;
A second state in which the first conductor is energized and the second conductor is not energized by changing from the unused state to the used state;
After entering the use state, the remaining capacity of the battery decreases to the lower limit value, so that the battery changes in order during the transition to the third state when the second conductor is also energized.

According to the above characteristic configuration, the heat sensitive material is visible from the outside of the housing. The discoloration pattern appearing on the heat-sensitive material is energized to the first conductor by changing from the first state when the first conductor and the second conductor are not energized in the unused state. In addition, the second state when the second conductor is not energized, and the third state when the second conductor is energized after the remaining capacity of the battery decreases to the lower limit value after entering the use state. It changes in order during the transition to the state.
Moreover, since the change of the discoloration pattern of the heat-sensitive material is performed by heat generated by energization of the first conductor and the second conductor, a large amount of power is not consumed to change the discoloration pattern.
Accordingly, it is possible to provide a battery-driven device with low power consumption and low cost.

According to another characteristic configuration of the battery-driven device according to the present invention, the first conductor and the second conductor are provided inside the casing with respect to the heat sensitive material,
The pattern corresponding to the shape of the first conductor and the second conductor is a discoloration pattern that appears on the heat-sensitive material.

  According to the above characteristic configuration, the heat sensitive material can be discolored in a pattern corresponding to each shape by Joule heat generated in the first conductor and the second conductor provided inside the heat sensitive material.

Still another characteristic configuration of the battery-driven device according to the present invention is that the heat-sensitive material of the display unit is one,
A first region that changes color due to Joule heat generated by energizing the first conductor, and a second region that changes color due to Joule heat generated by energizing the second conductor. Is that it is set separately.

  According to the above characteristic configuration, the first region of the heat-sensitive material that changes color by energization of the first conductor and the second region of the heat-sensitive material that changes color by the second conductor are set separately in one heat-sensitive material. Has been. That is, the user who has seen one heat sensitive material is in a state (first state) in which the heat sensitive material is not yet discolored because both the first conductor and the second conductor are not energized in the unused state. The first conductor is energized by being in use, and only the first region of the heat-sensitive material is discolored (second state) by not being energized by the second conductor, and is in use. After that, when the remaining capacity of the battery is lowered to the lower limit value, the second conductor is energized, so that the transition to the state (third state) in which both the first region and the second region of the heat sensitive material are discolored. Can be distinguished and recognized.

Still another characteristic configuration of the battery-driven device according to the present invention is that the heat-sensitive material of the display unit is two of a first heat-sensitive material and a second heat-sensitive material,
A first region that is discolored by Joule heat generated by energizing the first conductor is set in the first heat sensitive material,
The second heat sensitive material is provided with a second region which is discolored by Joule heat generated by energizing the second conductor.

  According to the above characteristic configuration, the first region of the heat-sensitive material that changes color when the first conductor is energized is set in the first heat-sensitive material, and the second heat-sensitive material that changes color by the second conductor is set in the second heat-sensitive material. The area is set. That is, the user who has seen two heat sensitive materials (the first heat sensitive material and the second heat sensitive material) has not yet been energized in both the first conductor and the second conductor in the unused state, and thus still has the first heat sensitive material. The first heat sensitive material is energized by passing the first conductor and not the second conductor from the state in which both the material and the second heat sensitive material are not discolored (first state). After the first region is discolored (second state) and after being used, the remaining electric capacity of the battery is reduced to the lower limit value, so that the second conductor is energized as well. It is possible to distinguish and recognize the transition to the state where the first region of the material and the second region of the second heat sensitive material are discolored (third state).

  Still another characteristic configuration of the battery-driven device according to the present invention is that the operation unit includes at least two detection sensors among a fire detection sensor, a gas leak detection sensor, and a carbon monoxide detection sensor. It is in the point that it has.

  According to the above characteristic configuration, it is possible to notify the outside of at least a plurality of abnormalities detected by the detection sensor of the operation unit among the occurrence of fire, the occurrence of gas leakage, and the increase in the carbon monoxide concentration.

It is a perspective view of the battery drive type apparatus of 1st Embodiment. It is a figure explaining the structure of the battery drive-type apparatus of 1st Embodiment. It is a figure which shows the structural example of the display part of the battery drive-type apparatus of 1st Embodiment. It is a figure which shows the structural example of the display part of the battery drive-type apparatus of 1st Embodiment. It is a figure which shows the structural example of the display part of the battery drive-type apparatus of 1st Embodiment. It is a perspective view of the battery drive type apparatus of 2nd Embodiment. It is a figure which shows the structural example of the display part of the battery drive-type apparatus of 2nd Embodiment. It is a figure which shows the structural example of the display part of the battery drive-type apparatus of 2nd Embodiment. It is a figure which shows the structural example of the display part of the battery drive-type apparatus of 2nd Embodiment.

<First Embodiment>
A battery-driven device according to a first embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view of a battery-driven device according to the first embodiment. FIG. 2 is a diagram illustrating the configuration of a battery-driven device. In the present embodiment, the alarm device A is shown as an example of a battery-driven device. As shown in the figure, the battery-powered alarm device A consumes the power supplied from the battery B, the operation unit C that operates by consuming the power supplied from the battery B, and the power supplied from the battery B. Thus, the housing 1 is provided with a display portion D that can change the information to be displayed. The operation unit C includes a control unit 3, a detection sensor 4, and an audio output unit 5. In the present embodiment, the shape of the housing 1 is a rectangle when viewed from the front surface 1 a of the housing 1.

  The detection sensor 4 includes, for example, sensors such as a gas detection sensor and a CO (carbon monoxide) detection sensor. The detection result of the detection sensor 4 is transmitted to the control unit 3.

The gas detection sensor is configured using a methane gas detection sensor for detecting the concentration of methane gas (CH ₄ ), which is a main component of city gas, for example, when city gas is a detection target. In the case where another gas is to be detected, a sensor that can detect the gas may be used. And the control part 3 determines whether the gas leak has generate | occur | produced based on the detection result transmitted from a gas detection sensor (namely, whether the gas concentration made into a detection target is more than predetermined level). To do.

  The CO detection sensor is configured using a gas sensor for detecting the concentration of carbon monoxide gas (CO). And the control part 3 determines whether the density | concentration of carbon monoxide is more than predetermined level based on the detection result transmitted from a CO detection sensor.

  An audio output unit 5 is also provided inside the housing 1. The audio output unit 5 is realized using a speaker or the like that can output audio. The sound output from the sound output unit 5 under the control of the control unit 3 is emitted to the outside of the housing 1 through the sound hole 9 provided in the front surface 1 a of the housing 1.

  The display unit D provided on the front surface 1a of the housing 1 includes a display window 6, a CO lamp 7, and a gas lamp 8. Further, the casing 1 allows gas to flow between the outside and the inside of the casing 1, and CO, methane gas, etc. existing outside the casing 1 are gas detection sensors inside the casing 1. A ventilation hole (not shown) is provided so as to reach (detection sensor 4). On the front surface 1 a of the housing 1, the letters “CO” are written on the CO lamp 7, and the letters “gas” are written on the gas lamp 8. As a result, the user can know which lamp represents what information. Each lamp is realized using an LED or the like, and operates according to control by the control unit 3.

  For example, when the control unit 3 determines that CO having a concentration equal to or higher than a predetermined value is detected based on the detection result of the CO detection sensor (detection sensor 4), the control unit 3 performs an alarm display such as turning on or blinking the CO lamp 7. If only CO having a concentration lower than the predetermined value is detected, the CO lamp 7 is turned off. Further, the control unit 3 may cause the sound output unit 5 to output a sound for notifying the abnormality of the CO concentration.

  Further, when the control unit 3 determines that methane having a concentration equal to or higher than a predetermined value is detected based on the detection result of the gas detection sensor (detection sensor 4), the control unit 3 causes an alarm display to turn on or blink the gas lamp 8. If only methane having a concentration lower than the predetermined value is detected, the gas lamp 8 is turned off. Further, the control unit 3 may cause the sound output unit 5 to output a sound for notifying the abnormality of the gas (methane) concentration.

  The top surface 1c of the housing 1 is provided with a hook portion 2 having a screw hole. In particular, the hook portion 2 is provided in the vicinity of the boundary between the top surface 1c and the back surface. Therefore, normally, in the alarm device A of the present embodiment, the state in which the screw hole of the hook portion 2 is hooked on a protrusion such as a screw provided on the wall surface, that is, the rear surface of the housing 1 is the installation location. It is installed in a state facing the wall surface.

  The power consumed by the control unit 3, the detection sensor 4, the audio output unit 5, and the display unit D included in the alarm device A is all supplied from the battery B. However, the power supply from the battery B to the control unit 3, the detection sensor 4, the audio output unit 5, and the display unit D is started after the user issues a start command for the alarm device A by the start command receiving unit SW, While the user does not issue a start command for the alarm device A by the start command receiving unit SW, power supply is not performed. In the present embodiment, the activation command receiving unit SW is the power switch 18 exposed to the outside on the side surface 1 b of the housing 1. Then, in response to the power-on operation for moving the power switch 18, the alarm device A changes from an unused state where the power-on operation has not yet been performed to a use state after the power-on operation has been performed. Configured to migrate.

3-5 is a figure which shows the structural example of the display part D of the battery drive type alarm device A of 1st Embodiment.
As shown in the figure, the display unit D includes a thermal paper 10 as a thermal material that changes color due to heat, and conductors 11c and 12c that can be supplied with electric power from the battery B. It is configured such that a predetermined color change pattern appears on the thermal paper 10 by Joule heat generated by energization. The electric conductor is supplied with electric power from the battery B, the first electric conductor 11c that is energized when the electric power is supplied from the unused state, and the remaining capacity of the battery B after the electric power is in a predetermined state. And a second conductor 12c that is energized when the lower limit is reached. The control unit 3 can recognize the remaining capacity of the battery B using, for example, the battery voltage as an index.

  The 1st conductor 11c is connected between the terminal 11a and the terminal 11b, and the control part 3 can control the electric current sent between these terminals 11a and 11b. The 2nd conductor 12c is connected between the terminal 12a and the terminal 12b, and the control part 3 can control the electric current sent between these terminals 12a and 12b. For example, the 1st conductor 11c and the 2nd conductor 12c are comprised using the material similar to a power fuse, for example.

  In the present embodiment, the display window 6 is an opening formed in the front surface 1 a of the housing 1. One thermal paper 10 included in the display unit D is set in a portion of the housing 1 that faces the display window 6. The surface of the thermal paper 10 (display surface), that is, the surface facing the outside of the housing 1 is given a predetermined color such as white. Therefore, the surface of the thermal paper 10 can be seen from the outside of the housing 1 through the display window 6. The first conductor 11 c and the second conductor 12 c are provided inside the housing 1 with respect to the thermal paper 10. Specifically, the first conductor 11 c and the second conductor 12 c are arranged close to the back surface of the thermal paper 10. As a result, when a current flows through the first conductor 11c to generate heat, the heat is transferred to the thermal paper 10, and the thermal paper 10 changes its color in a shape corresponding to the shape of the first conductor 11c. Similarly, when a current flows through the second conductor 12c to generate heat, the thermal paper 10 changes color in a shape corresponding to the shape of the second conductor 12c. That is, the pattern corresponding to the shape of the first conductor 11 c and the second conductor 12 c becomes a discoloration pattern that appears on the thermal paper 10. In the present embodiment, the first conductor 11c has a linear shape that connects the diagonal lines of the upper left and lower right of the square thermal paper 10 as shown in the figure, and the second conductor 12c is a square thermal paper. The paper 10 has a straight line shape connecting diagonal lines between the lower left and upper right of the paper 10. In this way, the first region (“R1” in FIGS. 2 and 3) that changes color due to Joule heat generated by energizing the first conductor 11c, and the second conductor 12c on one thermal paper 10. A second region ("R2" in FIG. 3) that changes color due to Joule heat generated by energization is set separately.

[First state]
FIG. 3 shows the thermal paper 10 in the first state.
The controller 3 cannot operate when power is not supplied from the battery B in an unused state. Therefore, in the first state, neither the first conductor 11c nor the second conductor 12c is energized, and no Joule heat is generated. Therefore, the thermal paper 10 is not discolored by the first conductor 11c and the second conductor 12c. Thus, the state which is not energized to both the 1st conductor 11c and the 2nd conductor 12c in an unused state is the 1st state.

[Second state]
FIG. 4 shows the thermal paper 10 in the second state.
The control unit 3 can operate when power is supplied from the battery B in the use state. Then, when the supply of electric power is started from the unused state, the control unit 3 controls the current flowing between the terminal 11a and the terminal 11b to supply the first conductor 11c with the second current. The conductor 12c is not energized. Therefore, a pattern (first region R1) corresponding to the shape of the heated first conductor 11c appears on the thermal paper 10. Thus, the state in which the first conductor 11c is energized and the second conductor 12c is not energized by changing from the unused state to the used state is the second state.

[Third state]
FIG. 5 shows the thermal paper 10 when in the third state.
When the remaining capacity of the battery B decreases to the lower limit after entering the use state, the control unit 3 controls the current flowing between the terminal 12a and the terminal 12b to energize the second conductor 12c. Therefore, a pattern (second region R2) corresponding to the shape of the heat-generated second conductor 12c appears on the thermal paper 10. It can be said that the event that the remaining capacity of the battery B has decreased to the lower limit value is a state in which the alarm device A has failed. Thus, after it will be in a use condition, the state by which it supplied with electricity also to the 2nd conductor 12c because the remaining capacity of the battery B fell to a lower limit is a 3rd state.

  As described above, the discoloration pattern appearing on the thermal paper 10 that can be seen from the outside of the housing 1 is the first when the first conductor 11c and the second conductor 12c are not energized in the unused state. When the first conductor 11c is energized and the second conductor 12c is not energized from the state, the remaining capacity of the battery B is lower than the second state when the second conductor 12c is not energized. By decreasing to a value, the second conductor 12c changes in order during the transition to the third state when energized. In addition, since the change in the discoloration pattern of the thermal paper 10 is performed by heat generated by energization of the first conductor 11c and the second conductor 12c, a large amount of electric power is not consumed to change the discoloration pattern. .

  In addition, the first region R1 of the thermal paper 10 that changes color by energization of the first conductor 11c and the second region R2 of the thermal paper 10 that changes color by the second conductor 12c are separated in one thermal paper 10. Is set to That is, a user who has seen one thermal paper 10 is in a state where the thermal paper 10 has not yet been discolored because both the first conductor 11c and the second conductor 12c are not energized in the unused state (first 1 state), the first conductor 11c is energized by being used and the second conductor 12c is not energized, so that only the first region R1 of the thermal paper 10 is discolored (second state). After the battery is in use, both the first region R1 and the second region R2 of the thermal paper 10 are energized by the second conductor 12c being energized as the remaining capacity of the battery B decreases to the lower limit. It is possible to distinguish and recognize the transition to the state in which the color has changed (third state).

Second Embodiment
The battery-driven device of the second embodiment is different from the above embodiment in the configuration of the display unit D. The battery-driven device of the second embodiment will be described below, but the description of the same configuration as that of the above embodiment will be omitted.

  FIG. 6 is a perspective view of the battery-driven device of the second embodiment. In the present embodiment, as the display window 6, a first display window 6 a and a second display window 6 b are provided on the front surface 1 a of the housing 1. A set of the first thermal paper 10a and the first conductor 11c, and the second thermal paper 10b and the second conductor 12c are provided inside the housings 1 of the first display window 6a and the second display window 6b. Are provided. In other words, the thermal paper 10 included in the display unit D is the first thermal paper 10a (first thermal material) and the second thermal paper 10b (second thermal material). In addition, “power supply” is described on the outer surface of the housing 1 next to the first display window 6a, and “failure” is described on the outer surface of the housing 1 next to the second display window 6b. Therefore, the user can recognize that the information regarding the power source is displayed by the first display window 6a and the information regarding the failure is displayed by the second display window 6b.

  The first conductor 11c is energized when power is supplied from the battery B to change from an unused state to a used state. The second conductor 12c is energized when the remaining capacity of the battery B is reduced to a predetermined lower limit value after entering the use state. The 1st conductor 11c is connected between the terminal 11a and the terminal 11b, and the control part 3 can control the electric current sent between these terminals 11a and 11b. The 2nd conductor 12c is connected between the terminal 12a and the terminal 12b, and the control part 3 can control the electric current sent between these terminals 12a and 12b. For example, the 1st conductor 11c and the 2nd conductor 12c are comprised using the material similar to a power fuse, for example.

  Also in this embodiment, the surface (display surface) of the first thermal paper 10a and the second thermal paper 10b, that is, the surface facing the outside of the housing 1 is given a predetermined color such as white. The first conductor 11c is disposed close to the back surface of the first thermal paper 10a. As a result, when a current flows through the first conductor 11c to generate heat, the first thermal paper 10a changes color to a shape corresponding to the shape of the first conductor 11c. Similarly, the second conductor 12 c is disposed close to the back surface of the thermal paper 10. As a result, when a current flows through the second conductor 12c to generate heat, the thermal paper 10 changes color in a shape corresponding to the shape of the second conductor 12c. That is, the pattern corresponding to the shape of the first conductor 11 c and the second conductor 12 c becomes a discoloration pattern that appears on the thermal paper 10. In the present embodiment, the first conductor 11c has a linear shape that crosses the rectangular first thermal paper 10a in the horizontal direction, and the second conductor 12c also crosses the square second thermal paper 10b in the horizontal direction. It has a linear shape. As described above, the first thermal paper 10a is set with the first region ("R1" in FIGS. 8 and 9) that changes color due to Joule heat generated by energizing the first conductor 11c. A second region (“R2” in FIG. 9) that changes color due to Joule heat generated by energizing the second conductor 12c is set on the paper 10b.

[First state]
FIG. 7 shows the first thermal paper 10a and the second thermal paper 10b in the first state.
The controller 3 cannot operate when power is not supplied from the battery B in an unused state. Therefore, in the first state, neither the first conductor 11c nor the second conductor 12c is energized, and no Joule heat is generated. Therefore, the first thermal paper 10a and the second thermal paper 10b are not discolored by the first conductor 11c and the second conductor 12c. Thus, the state which is not energized to both the 1st conductor 11c and the 2nd conductor 12c in an unused state is the 1st state.

[Second state]
FIG. 8 shows the first thermal paper 10a and the second thermal paper 10b in the second state.
The control unit 3 can operate when power is supplied from the battery B in the use state. Then, when the supply of electric power is started from the unused state, the control unit 3 controls the current flowing between the terminal 11a and the terminal 11b to supply the first conductor 11c with the second current. The conductor 12c is not energized. Therefore, a pattern (first region R1) corresponding to the shape of the first conductor 11c that has generated heat appears on the first thermal paper 10a. Thus, the state in which the first conductor 11c is energized and the second conductor 12c is not energized by changing from the unused state to the used state is the second state.

[Third state]
FIG. 9 shows the first thermal paper 10a and the second thermal paper 10b in the third state.
When the remaining capacity of the battery B decreases to the lower limit after entering the use state, the control unit 3 controls the current flowing between the terminal 12a and the terminal 12b to energize the second conductor 12c. Therefore, a pattern (second region R2) corresponding to the shape of the heat-generated second conductor 12c appears on the second thermal paper 10b. It can be said that the event that the remaining capacity of the battery B has decreased to the lower limit value is a state in which the alarm device A has failed. Thus, after it will be in a use condition, the state by which it supplied with electricity also to the 2nd conductor 12c because the remaining capacity of the battery B fell to a lower limit is a 3rd state.

  As described above, the first thermal paper 10a is set with the first region of the thermal paper 10 that changes color when the first conductor 11c is energized, and the second thermal paper 10b is changed with the second conductor 12c. Ten second regions are set. That is, the user who has seen the two first thermal paper 10a and the second thermal paper 10b has not yet been energized to both the first conductor 11c and the second conductor 12c in the unused state. When both the paper 10a and the second thermal paper 10b are not discolored (first state), the first conductor 11c is energized and the second conductor 12c is not energized by entering the use state. After the first region of the first thermal paper 10a is discolored (second state) and after being used, the remaining capacity of the battery B is reduced to the lower limit value so that the second conductor 12c is energized. As a result, it is possible to distinguish and recognize the transition to the state where the first region of the first thermal paper 10a and the second region of the second thermal paper 10b are discolored (third state).

<Another embodiment>
<1>
In the said embodiment, although the specific example was given and demonstrated about the structure of the alarm device A as a battery drive-type apparatus of this invention, the structure can be changed suitably. For example, although the thermal paper 10 is exemplified as the thermal material, a thermal material other than paper may be used.
In addition, the shape, size, installation position, and the like of the thermal paper 10, the first conductor 11c, the second conductor 12c, and the like are not limited to the specific examples described in the above embodiment, and can be changed as appropriate.
Moreover, in the said embodiment, although the gas detection sensor and CO (carbon monoxide) detection sensor were illustrated as the detection sensor 4, another kind of sensor may be sufficient.

<2>
The structure disclosed in the above embodiment (including another embodiment) can be applied in combination with the structure disclosed in the other embodiment as long as no contradiction arises, and is disclosed in this specification. The embodiment described above is an exemplification, and the embodiment of the present invention is not limited to this, and can be appropriately modified without departing from the object of the present invention.

  The present invention can be used for battery-driven equipment with low power consumption and low cost.

DESCRIPTION OF SYMBOLS 1 Case 4 Detection sensor 5 Audio | voice output part 10 Thermal paper (thermal material)
10a First thermal paper (first thermal material)
10b Second thermal paper (second thermal material)
11c 1st conductor 12c 2nd conductor A Alarm device (apparatus)
B Battery C Operation part D Display part

Claims (5)

A battery for supplying power;
An operation unit that operates by consuming electric power supplied from the battery;
A battery-driven device that consumes electric power supplied from the battery and includes a display unit that can change information to be displayed in a housing,
The display unit includes a heat-sensitive material that changes color due to heat and a conductor that can be supplied with electric power from the battery, and the heat-sensitive material is predetermined by Joule heat generated by energizing the conductor. The discoloration pattern of the pattern of
The conductor includes a first conductor that is energized when power is supplied from the battery to change from an unused state to a use state, and a remaining capacity of the battery after the use state is predetermined. Having a second conductor that is energized when it falls to the lower limit of
The discoloration pattern of the predetermined pattern appearing on the heat sensitive material is
A first state where both the first conductor and the second conductor are not energized in the unused state;
A second state in which the first conductor is energized and the second conductor is not energized by changing from the unused state to the used state;
A battery-driven device that sequentially changes during the transition to the third state when the second conductor is energized as the remaining capacity of the battery decreases to the lower limit value after entering the use state. . The first conductor and the second conductor are provided inside the casing with respect to the heat sensitive material,
The battery-driven device according to claim 1, wherein a pattern corresponding to the shape of the first conductor and the second conductor is a discoloration pattern that appears on the heat-sensitive material. The heat-sensitive material that the display unit has is one,
A first region that changes color due to Joule heat generated by energizing the first conductor, and a second region that changes color due to Joule heat generated by energizing the second conductor. The battery-powered device according to claim 1 or 2, wherein is set separately. The said heat sensitive material which the said display part has are two, a 1st heat sensitive material and a 2nd heat sensitive material,
A first region that is discolored by Joule heat generated by energizing the first conductor is set in the first heat sensitive material,
3. The battery-driven device according to claim 1, wherein a second region that changes color by Joule heat generated by energizing the second conductor is set in the second heat sensitive material. 5. The operation unit according to claim 1, wherein the operation unit includes at least two detection sensors among a fire detection sensor, a gas leak detection sensor, and a carbon monoxide detection sensor. The battery powered device as described.

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