JP2018181189A - Gas detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas detector with low cost when using for a long time.SOLUTION: A gas detector 100 for detecting a target gas includes: a first part 11; and a second part 21 whose performance deterioration rate is different from that of the first part. At least one of the first part and the second part is replaceably provided. Besides, both the first part and the second part may be replaceably provided. One of the first part and the second part includes a sensor for detecting the target gas and a battery for supplying power to a wireless section or a gas detector for transmitting or receiving wireless signals.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a gas detector.

BACKGROUND ART A gas detector that detects a target gas is known (see, for example, Patent Document 1). The gas detector comprises a plurality of components such as a sensor and a battery.
Patent Document 1: JP-A-2015-194846

  Preferably, the gas detector has a low cost for long-term use.

  In one aspect of the present invention, a gas detector for detecting a target gas is provided. The gas detector may comprise a first part and a second part having a different rate of degradation of performance than the first part. At least one of the first part and the second part may be exchangeably provided. Both the first part and the second part may be provided interchangeably.

  One of the first part and the second part may include a sensor that detects the target gas. One of the first component and the second component may include a wireless unit that transmits or receives a wireless signal. One of the first part and the second part may include a battery to power the gas detector.

  The gas detector may comprise a power supply line connected to the first part or the second part and supplying power supply power. The gas detector may comprise a signal line connected to the first part or the second part to transmit a signal. When the first part or the second part is removed from the gas detector, the power supply line may be disconnected from the first part or the second part before the signal line. When the first part or the second part is attached to the gas detector, the signal line may be connected to the first part or the second part prior to the power supply line.

  The gas detector may comprise a component insert into which the first component or the second component is inserted. The gas detector may comprise a movable lid covering the component insert. The gas detector is provided on the lid and is connected to the first part or the second part with the lid closed, and from the first part or the second component with the lid open A power supply line to be disconnected may be provided.

  The gas detector may comprise a first receptacle containing the first part and a second receptacle containing the second part. The gas detector may further include a fixing portion that is continuously formed across the first housing portion and the second housing portion and fixes the gas detector to the outside.

  An engagement portion that engages with the other accommodation portion may be provided in one of the first accommodation portion and the second accommodation portion. The engagement portion may be provided with a wire electrically connecting the first component and the second component.

  The engagement portion may be provided in the second accommodation portion and engaged with the first accommodation portion. The wiring may include a power supply line connected to the first component and supplying power supply power. The wiring may include a signal line connected to the first component to transmit a signal. When the engaging portion is disengaged from the first accommodating portion, the power supply line may be disconnected from the first component prior to the signal line. When the engaging portion engages with the first accommodation portion, the signal line may be connected to the first component prior to the power supply line.

  The above summary of the invention does not enumerate all of the features of the present invention. In addition, a subcombination of these feature groups can also be an invention.

It is a perspective view which shows the outline | summary of the gas detector 100 which concerns on one Embodiment of this invention. It is a figure which shows the 1st accommodating part 10 and the 2nd accommodating part 20 of the isolate | separated state. It is a figure which shows an example of the components contained in the 1st accommodating part 10 and the 2nd accommodating part 20. FIG. FIG. 8 is a view showing another example of parts included in the first housing portion 10 and the second housing portion 20. FIG. 8 is a view showing another example of parts included in the first housing portion 10 and the second housing portion 20. FIG. 7 is a perspective view showing another example of the gas detector 100. It is a figure which shows an example of the wiring which electrically connects the 1st accommodating part 10 and the 2nd accommodating part 20. As shown in FIG. FIG. 6 is a view showing another configuration example of the gas detector 100. FIG. 6 is a view showing an example of a wiring provided in a convex portion 62. 5 is a partially enlarged view showing another structure of the gas detector 100. FIG. 5 is a partially enlarged view showing another structure of the gas detector 100. FIG. 7 is a perspective view showing another structure of the gas detector 100. FIG.

  Hereinafter, the present invention will be described through the embodiments of the invention, but the following embodiments do not limit the invention according to the claims. Moreover, not all combinations of features described in the embodiments are essential to the solution of the invention.

  FIG. 1 is a perspective view showing an outline of a gas detector 100 according to an embodiment of the present invention. The gas detector 100 detects whether or not a predetermined target gas is contained in the air taken in from the gas detection hole 22 at a reference concentration or more. The gas detector 100 may have a speaker 24 that outputs an alarm when the target gas is above the reference concentration.

  The gas detector 100 of this example includes a plurality of storage units. The gas detector 100 shown in FIG. 1 includes a first accommodating portion 10 and a second accommodating portion 20. Each housing portion is made of plastic or the like to store components. The first accommodating portion 10 accommodates the first component 11, and the second accommodating portion 20 accommodates the second component 21. The first component 11 and the second component 21 have different rates of deterioration of performance.

  The degradation rate of the performance of the part may indicate a rate at which the performance is degraded per unit time with respect to the initial value of the predetermined performance when the gas detector 100 starts operation. If the part is a sensor, the performance may be the gain (ie sensitivity) of the signal strength for a given gas concentration. If the part is a battery, the performance may be the remaining capacity of the power. If the battery is rechargeable, the performance may be the output voltage value at full charge. If the part is a wireless part, the performance may be the strength of the output signal. In addition, as the deterioration rate of the performance of the part, the lifetime guaranteed by the manufacturer for each part may be used. The longer the lifetime, the smaller the degradation rate.

  At least one of the first part 11 and the second part 21 is provided exchangeably. Preferably, both the first part 11 and the second part 21 are provided exchangeably. In the present embodiment, at least one of the first housing portion 10 and the second housing portion 20 is exchangeably provided, but in another example, it may be exchangeable in units of parts included in the housing portion. .

  FIG. 2 is a view showing the first housing portion 10 and the second housing portion 20 in a separated state. At least one of the first storage unit 10 and the second storage unit 20 in the present example is removable from the gas detector 100 and has a mountable structure. The first housing portion 10 and the second housing portion 20 may have a recess into which a fastening member such as a screw can be inserted and removed, and may have an elastic member such as a snap fit. In addition, the gas detector 100 may have a case that accommodates the first accommodation portion 10 and the second accommodation portion 20 in an exchangeable manner.

  By replacing at least one of the first component 11 and the second component 21, it is possible to replace a component whose performance has deteriorated. For this reason, the cost of long-term use of the gas detector 100 can be reduced compared to the case where the entire gas detector 100 is replaced. The first part 11 and the second part 21 are preferably independently replaceable. In this case, it is possible to further reduce the cost because parts having degraded performance can be sequentially replaced.

  FIG. 3A is a view showing an example of parts included in the first housing portion 10 and the second housing portion 20. As shown in FIG. In this example, the wireless unit 32 is shown as the first component 11 included in the first accommodation unit 10. The wireless unit 32 transmits or receives a wireless signal. When the target gas of the reference concentration or more is detected by the sensor 34, the wireless unit 32 may transmit that effect to an external device. In addition, the wireless unit 32 may transmit a signal indicating that the gas detector 100 is operating to an external device every predetermined period. When the external device does not receive a predetermined signal from the wireless unit 32 for a predetermined period, the external device may determine that the gas detector 100 is not operating.

  The wireless unit 32 may transmit to an external device that at least one of the sensor 34 and the battery 36 should be replaced. The gas detector 100 may include a monitoring unit that monitors the performance of at least one of the sensor 34 and the battery 36.

  In this example, the sensor 34 and the battery 36 are shown as the second component 21 included in the second housing portion 20. The sensor 34 detects whether the concentration of the target gas is equal to or higher than a reference value. The sensor 34 may include a material such as a semiconductor whose electrical resistance changes when exposed to the atmosphere of the target gas. Also, the sensor 34 may include a heater that heats a material such as a semiconductor.

  The sensor 34 may detect the target gas at a predetermined cycle. The heater may heat the sensor 34 in synchronization with the timing at which the sensor 34 detects the target gas. The intermittent operation of the sensor 34 can reduce the power consumption of the sensor 34.

  The battery 36 supplies power to the wireless unit 32 and the sensor 34. The battery 36 may also supply power to other components, such as speakers.

  In the present example, the radio unit 32 can be exchanged by exchanging the first accommodating unit 10. Further, by replacing the second housing portion 20, the sensor 34 and the battery 36 can be replaced. It is preferable that each housing part be provided with parts having a relatively near deterioration rate of performance.

  The radio system or the frequency of the signal to be used by the radio unit 32 may differ depending on the country, region, etc. where the gas detector 100 is used. By making the wireless unit 32 exchangeable independently of the sensor 34 and the battery 36, the second housing unit 20 can be made common regardless of the country, the region, etc., and only the wireless unit 32 can be exchanged.

  FIG. 3B is a view showing another example of parts included in the first housing portion 10 and the second housing portion 20. As shown in FIG. In this example, the wireless unit 32 and the battery 36 are shown as the first component 11 included in the first housing unit 10, and the sensor 34 is used as the second component 21 included in the second housing unit 20. It is shown.

  FIG. 3C is a view showing another example of parts included in the first housing portion 10 and the second housing portion. In this example, the wireless unit 32 and the sensor 34 are shown as the first component 11 included in the first housing unit 10, and the battery 36 is used as the second component 21 included in the second housing unit 20. It is shown.

  The wireless unit 32, the sensor 34, and the battery 36 may be independently replaceable. Although the gas detector 100 of FIGS. 1 to 3C has a plurality of storage units, the gas detector 100 of another example may not have a plurality of storage units. In this case, the gas detector 100 may house the radio unit 32, the sensor 34 and the battery 36 in a single housing made of plastic or the like. The wireless unit 32, the sensor 34, and the battery 36 may be provided separately and exchangeably with respect to the storage unit.

  FIG. 4 is a perspective view showing another example of the gas detector 100. As shown in FIG. The gas detector 100 of this example includes a first connection 44 and a second connection 40. The other structure is the same as the gas detector 100 described in FIGS. 1 to 3C.

  One of the first connection portion 44 and the second connection portion 40 is provided in the first accommodation portion 10, and the other is provided in the second accommodation portion 20. In the present example, the first connection portion 44 is provided in the first accommodation portion 10, and the second connection portion 40 is provided in the second accommodation portion 20.

  The first connection 44 and the second connection 40 have shapes that engage with each other. In the present example, the second connection portion 40 is provided projecting from a predetermined surface of the second accommodation portion 20, and the first connection portion 44 is provided recessed from the predetermined surface of the first accommodation portion 10. It is done. The shapes of the second connection 40 and the first connection 44 are approximately equal. By inserting the second connection portion 40 into the first connection portion 44, the first housing portion 10 and the second housing portion 20 are fixed.

  The first connection portion 44 may have a first fixing portion 46, and the second connection portion 40 may have a second fixing portion 42. The first fixing portion 46 and the second fixing portion 42 have a shape in which one protrudes and the other a shape in which the other is recessed. When the second connection portion 40 is inserted to the first connection portion 44 to a predetermined depth, the first fixing portion 46 and the second fixing portion 42 engage with each other, and the second connection portion 40 and the first connection portion 44 are fixed. At least one of the first fixing portion 46 and the second fixing portion 42 may have elasticity.

  FIG. 5 is a view showing an example of the wiring for electrically connecting the first housing portion 10 and the second housing portion 20. As shown in FIG. The wiring may include pins, pads, printed wiring, and the like. The gas detector 100 of this example has one or more signal lines 54 and one or more power supply lines 52 as the wiring. The power supply line 52 supplies power to the components. The signal line 54 is connected to the component to transmit a signal. For example, the signal line 54 transmits the output signal of the sensor 34 to the wireless unit 32. The signal line 54 and the power supply line 52 in this example are pins formed of a conductive member.

  As an example, the signal line 54 and the power supply line 52 are fixed to the second housing portion 20. A portion of the signal line 54 and the power supply line 52 fixed to the second accommodation portion 20 is electrically connected to the second component 21 accommodated in the second accommodation portion 20. A portion of the signal line 54 and the power supply line 52 which is inserted into the first accommodating portion 10 is electrically connected to the first component 11 accommodated in the first accommodating portion 10. In another example, the signal line 54 and the power supply line 52 are fixed to the first housing portion 10, and a portion fixed to the first housing portion 10 is electrically connected to the first component 11, and the second The portion inserted into the housing 20 may be electrically connected to the second component 21 housed in the second housing 20.

  In the example of FIG. 5, the signal line 54 and the power supply line 52 are provided at the second connection portion 40 of the second accommodation unit 20, but the place where the signal line 54 and the power supply line 52 are provided is the second It is not limited to the connection part 40 of. The signal line 54 and the power supply line 52 are provided on the surface of the second accommodation unit 20 facing the first accommodation unit 10 when the first accommodation unit 10 and the second accommodation unit 20 are fixed. The signal line 54 and the power supply line 52 are provided so as to protrude from the surface of the second accommodation portion 20 in the direction toward the first accommodation portion 10.

  A pin insertion portion 58 into which the signal line 54 is inserted and a pin insertion portion 56 into which the power supply line 52 is inserted are provided on the surface of the first accommodation portion 10 facing the second accommodation portion 20. A conductive portion electrically connected to the signal line 54 or the power supply line 52 is provided on at least a part of the inner wall of the pin insertion portion 58 and the pin insertion portion 56. The conductive portion is electrically connected to the first component 11 housed in the first housing portion 10.

  With such a structure, when the first housing portion 10 and the second housing portion 20 are fixed, the first component 11 and the second component 21 are electrically connected, and the first housing portion When the second housing portion 20 is separated from the second housing portion 10, the first component 11 and the second component 21 are electrically separated. Thereby, the electrical connection between the parts can be automatically switched when replacing any one of the housings.

  When the first component 11 or the second component 21 is removed from the gas detector 100, the power supply line 52 precedes the signal wire 54 with respect to the first component 11 or the second component 21. It is preferable to be in a non-connected state. If the signal line 54 is disconnected prior to the power supply line 52, an inappropriate signal may be input to a component to which power supply power is supplied. On the other hand, by disconnecting the power supply line 52 in a state in which the respective signal lines 54 are connected, malfunction of each component can be suppressed. For example, when replacing the sensor 34 and the battery 36, the power supply line 52 connecting the wireless unit 32 and the battery 36 is disconnected prior to the signal line 54 connecting the wireless unit 32 and the sensor 34. . This can suppress the wireless unit 32 from transmitting an incorrect signal to the outside.

  In addition, when the first component 11 or the second component 21 is attached to the gas detector 100, the signal line 54 precedes the power supply line 52 with respect to the first component 11 or the second component 21. It is preferable to be in a connected state. As a result, after connecting each signal line 54, power can be supplied to each component, and malfunction of each component can be suppressed.

  In the example of FIG. 5, when connecting the first accommodation unit 10 and the second accommodation unit 20, the signal line 54 precedes the power supply line 52 in the first component 11 or the second component 21. It will be in the connected state. In addition, when the first housing portion 10 and the second housing portion 20 are separated, the power supply line 52 is not connected to the first component 11 or the second component 21 before the signal line 54. It becomes a state.

  As an example, the signal line 54 is formed to be longer toward the first connection portion 44 than the power supply line 52. Therefore, when the second connection portion 40 is brought close to the first connection portion 44, the signal line 54 and the pin insertion portion 58 are electrically connected at a timing earlier than that of the power supply line 52 and the pin insertion portion 56. Ru. When the second connection portion 40 is moved away from the first connection portion 44, the power supply line 52 and the pin insertion portion 56 are disconnected at a timing earlier than that of the signal line 54 and the pin insertion portion 58.

  FIG. 6 is a view showing another configuration example of the gas detector 100. As shown in FIG. The gas detector 100 of this example is different from the gas detector 100 described in FIGS. 1 to 5 in the structure for connecting the first accommodating portion 10 and the second accommodating portion 20. The other structure is the same as any of the gas detectors 100 described in FIGS.

  One of the first housing portion 10 and the second housing portion 20 of the present example has a convex portion 62 on the side surface, and the other has a concave portion 64 on the side surface. In the example of FIG. 6, the first housing portion 10 has a convex portion 62, and the second housing portion 20 has a concave portion 64.

  The convex portion 62 and the concave portion 64 in this example are formed along the longitudinal direction of the side surface of each accommodation portion. The first housing portion 10 and the second housing portion 20 are connected by engaging the ends of the convex portion 62 and the concave portion 64 and sliding along the longitudinal direction. The convex portion 62 and the concave portion 64 preferably have a protrusion, a recess, and the like so that the first housing portion 10 and the second housing portion 20 do not move relatively in a direction different from the longitudinal direction. In addition, a stopper 66 may be provided at the end of the recess 64 to prevent the protrusion 62 from falling off in the longitudinal direction.

  FIG. 7 is a view showing an example of the wiring provided in the convex portion 62. As shown in FIG. A power supply line 52 and a signal line 54 formed by printing or plating are provided on the surface of the convex portion 62 in this example. The recess 64 is provided with a wire connected to the power supply line 52 and a wire connected to the signal line 54.

  Also in this example, when connecting the first accommodating portion 10 and the second accommodating portion 20, the signal line 54 precedes the power supply line 52 with respect to the first component 11 or the second component 21. It is preferable to be in the connected state. In addition, when the first housing portion 10 and the second housing portion 20 are separated, the power supply line 52 is not connected to the first component 11 or the second component 21 before the signal line 54. It is preferable to be in the state.

  As an example, when connecting the 1st accommodating part 10 and the 2nd accommodating part 20, let the direction which slides the convex part 62 with respect to the recessed part 64 be a sliding direction. The signal line 54 may be formed beyond the power supply line 52 in the sliding direction.

  FIG. 8 is a partially enlarged view showing another structure of the gas detector 100. As shown in FIG. In the present example, an engagement portion 80 that engages with the other accommodation portion is provided in one of the accommodation portions of the first accommodation portion 10 and the second accommodation portion 20. In the present example, the second housing portion 20 is provided with the engaging portion 80. The engaging portion 80 in this example is provided rotatably around a connection point 81 with the second accommodation portion 20. The engaging portion 80 contacts the first storage portion 10 when it is pivoted to a predetermined position, and fixes the first storage portion 10 to the second storage portion 20.

  The engagement portion 80 may be provided with a wire 82 for connecting the first component 11 and the second component 21. The wiring 82 may be formed inside the engagement portion 80. The wiring 82 is connected to the first component 11 and the second component 21 in a state where the engaging portion 80 fixes the first component 11 and the second component 21.

  The first housing portion 10 may be provided with a wiring 88 for electrically connecting the wiring 82 of the engaging portion 80 and the first component 11. The second housing portion 20 may be provided with a wiring 84 for electrically connecting the wiring 82 of the engaging portion 80 and the second component 21. In addition, at least one of the first housing portion 10 and the second housing portion 20 may be provided with a pin 86 projecting from the housing portion. The pin 86 is connected to the wire 84 or the wire 88, and is inserted into the inside of the engaging portion 80 in a state in which the engaging portion 80 fixes the first component 11 and the second component 21. Connected The pin 86 is not connected to the wiring 82 in a state where the engaging portion 80 does not fix the first component 11 and the second component 21.

  With such a structure, the first part 11 and the second part 21 are electrically connected or not connected with mechanical fixing or separation of the first housing portion 10 and the second housing portion 20. It can be connected. For this reason, at the time of parts replacement, it is possible to suppress the forgetting to turn on and off the power of the gas detector 100.

  The wiring 82 may include both the power supply line 52 and the signal line 54. When the engaging portion 80 is disengaged from the first housing portion 10, the power supply line 52 is preferably disconnected from the first component 11 before the signal line 54. In addition, when the engaging portion 80 engages with the first housing portion 10, the signal line 54 is preferably connected to the first component 11 earlier than the power supply line 52. For example, the signal line 54 is provided in the region of the engaging portion 80 that comes in contact with the first accommodating portion 10 first among the surfaces in contact with the first accommodating portion 10. A power supply line 52 is provided in the contact area.

  In addition, when the engaging portion 80 is disengaged from the first housing portion 10, the power supply line 52 is preferably disconnected from the second component 21 before the signal line 54. In addition, when the engaging portion 80 engages with the first housing portion 10, the signal line 54 is preferably connected to the second component 21 earlier than the power supply line 52. For example, the signal line 54 is provided first in the region of the engaging portion 80 in contact with the second accommodation portion 20 in the surface contacting the second accommodation portion 20, and the second accommodation portion 20 and the later are A power supply line 52 is provided in the contact area.

  FIG. 9 is a partially enlarged view showing another structure of the gas detector 100. As shown in FIG. In the present example, at least one of the first housing portion 10 and the second housing portion 20 is provided with a component insertion portion 92 into which a component is inserted. In the example of FIG. 9, a component insertion portion 92 is provided in the second accommodation portion 20. For example, components such as the battery 36 are inserted into the component insertion portion 92.

  The second housing portion 20 is provided with a lid portion 90 which covers the opening portion of the component insertion portion 92. The lid 90 is a movable lid movable between a position covering the component insertion portion 92 and a position not covering the component insertion portion 92. For example, the lid portion 90 may be pivotable in the same manner as the engaging portion 80, and may be slidable along the side surface of the second accommodation portion 20 provided with the opening portion of the component insertion portion 92. .

  The lid portion 90 is connected to the component disposed in the component insertion portion 92 in a state where the lid portion 90 is closed, and is separated from the component disposed in the component insertion portion 92 in a state where the lid portion 90 is opened. Wiring 94 is provided. The wire 94 may include both the power supply line 52 and the signal line 54. The wiring 94 is electrically connected to any of the components housed in the first housing portion 10 and the second housing portion 20. With such a structure, when replacing the component of the component insertion portion 92, the wiring 94 can be automatically connected to or disconnected from the component. When the lid 90 is opened, it is preferable that the power supply line 52 be disconnected from the component inserted into the component insertion section 92 before the signal line 54. When the lid 90 is closed, the signal line 54 is preferably connected to the component inserted into the component insertion section 92 before the power supply line 52.

  The lid portion 90 may have a function of fixing the first housing portion 10 and the second housing portion 20 in the same manner as the engaging portion 80. In this case, the lid 90 is in contact with the first housing 10 with the lid 90 closed. In addition, the lid 90 may not be in contact with the first storage unit 10 in the closed state.

  FIG. 10 is a perspective view showing another structure of the gas detector 100. As shown in FIG. The gas detector 100 of the present example is provided with a fixing portion 102 which is continuously formed across the first housing portion 10 and the second housing portion 20 and fixes the gas detector 100 to the outside. The fixing portion 102 may be a groove formed continuously in the first housing portion 10 and the second housing portion 20. As an example, the fixing portion 102 is provided on the side opposite to the gas detection hole 22.

  The fixing portion 102 engages with an external fixing portion. In the present example, the external fixing portion is provided with a protrusion having the same shape as that of the fixing portion 102. The fixing portion 102 and the external fixing portion have a shape in which the gas detector 100 and the external fixing portion are not separated in the direction perpendicular to the surface on which the fixing portion 102 of the gas detector 100 is provided. Since the fixing portion 102 is provided across the first housing portion 10 and the second housing portion 20, the projection of the external fixing portion is also provided to both the first housing portion 10 and the second housing portion 20. Commonly arranged. Therefore, the fixing strength of the first housing portion 10 and the second housing portion 20 can be improved.

  Moreover, each gas detector 100 demonstrated in FIGS. 1-10 may confirm whether the gas detector 100 operate | moves normally, when either part is replaced | exchanged. For example, the gas detector 100 performs an operation check when the engaging portion 80 moves from a predetermined open position to a predetermined fixed position. The wireless unit 32 may transmit the result of the operation check to an external device. Further, when it is determined that the gas detector 100 is not operating normally, the gas detector 100 may notify the user of the fact from the speaker 24 or the like.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It is apparent to those skilled in the art that various changes or modifications can be added to the above embodiment. It is also apparent from the scope of the claims that the embodiments added with such alterations or improvements can be included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 10 ... 1st accommodating part, 11 ... 1st component, 20 ... 2nd accommodating part, 21 ... 2nd component, 22 ... gas detection hole, 24 ... Loudspeaker 32 radio unit 34 sensor 36 battery 40 second connection portion 42 second fixing portion 44 first connection portion 46: first fixing portion 52: power supply line 54: signal line 56: pin insertion portion 58: pin insertion portion 62: convex portion 64 ....... ... Lid part, 92 ... Component insertion part, 94 ... Wiring, 100 ... Gas detector, 102 ... Fixed part

Claims (12)

A gas detector for detecting a target gas,
The first part,
And a second part having a performance deterioration rate different from that of the first part,
A gas detector in which at least one of the first part and the second part is provided exchangeably. The gas detector according to claim 1, wherein both the first part and the second part are provided exchangeably. The gas detector according to claim 1, wherein one of the first component and the second component includes a sensor that detects the target gas. The gas detector according to any one of claims 1 to 3, wherein one of the first component and the second component includes a wireless unit that transmits or receives a wireless signal. The gas detector according to any one of claims 1 to 4, wherein one of the first component and the second component includes a battery that supplies power to the gas detector. A power supply line connected to the first part or the second part to supply power source power;
A signal line connected to the first part or the second part for transmitting a signal;
When the first part or the second part is removed from the gas detector, the power supply line is not connected to the first part or the second part prior to the signal line. The gas detector according to any one of claims 1 to 5, which is in a state. When the first part or the second part is attached to the gas detector, the signal line is connected to the first part or the second part earlier than the power supply line. The gas detector according to claim 6. A part insertion portion into which the first part or the second part is inserted;
A movable lid portion covering the component insertion portion;
It is provided in the lid, and is connected to the first part or the second part in a state where the lid is closed, and the first part or the second in a state where the lid is opened. The gas detector according to any one of claims 1 to 5, further comprising: a power supply line separated from the component. A first housing portion for housing the first part, and a second housing portion for housing the second part,
The gas according to any one of claims 1 to 8, further comprising: a fixing portion formed continuously across the first housing portion and the second housing portion, and fixing the gas detector to the outside. Detector. A first housing portion for housing the first part, and a second housing portion for housing the second part,
An engagement portion that engages with the other accommodation portion is provided in one of the accommodation portions of the first accommodation portion and the second accommodation portion.
The gas detector according to any one of claims 1 to 9, wherein a wire for electrically connecting the first component and the second component is provided in the engagement portion. The engagement portion is provided in the second accommodation portion and engaged with the first accommodation portion.
The wiring is
A power supply line connected to the first component and supplying power supply power;
A signal line connected to the first component for transmitting a signal;
11. The gas detection device according to claim 10, wherein, when the engaging portion is disengaged from the first accommodation portion, the power supply line is not connected to the first component prior to the signal line. vessel. 12. The gas according to claim 11, wherein when the engaging portion engages with the first storage portion, the signal line is connected to the first component earlier than the power supply line. Detector.

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