Detection device

Abstract

To provide a detection device with an improved configuration. [Solution] The detection device comprises a gas bag having a bag body capable of storing gas and expanding and contracting in response to the inflow and outflow of the gas, a fixing part that engages with the gas bag, and a sensor that detects the concentration or type of a specific gas contained in the gas supplied from the gas bag, wherein the bag body has an expandable and contractible part and a fixed end located at a location different from where the expandable and contractible part is located, and the gas bag is fixed to the fixing part at the fixed end.

Description

Technical Field

[0001] The present disclosure relates to a detection device for detecting the type and concentration of a gas.

Background Art

[0002] Conventionally, a detection device for detecting the type and concentration of a specific gas contained in a gas has been known (for example, the device described in Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] There is still room for improvement in the configuration of each part of the detection device. One aspect of the present disclosure provides a detection device having a more improved configuration.

Means for Solving the Problems

[0005] A detection device according to one aspect of the present disclosure includes a gas bag having a bag body capable of storing a gas and expanding and contracting as the gas flows in and out, a fixing part engaged with the gas bag, and a sensor for detecting the concentration or type of a specific gas contained in the gas supplied from the gas bag. The bag body has an expandable and contractible expansion part and a fixed end part located at a position different from the position where the expansion part is located, and the gas bag is fixed to the fixing part at the fixed end part.

Effects of the Invention

[0006] According to one aspect of the present disclosure, a detection device having a more improved configuration can be provided.

Brief Description of the Drawings

[0007] [Figure 1] This is a perspective view showing an example of the appearance of the detection device related to this disclosure. [Figure 2] This figure shows the detection device shown in Figure 1, viewed from the negative Y-axis direction. [Figure 3] This is a perspective view showing an example of the internal structure of a detection device with the lower housing removed. [Figure 4] This is a schematic diagram showing an example of the connection status of each part of the detection device. [Figure 5] This is a front view showing the configuration shown in Figure 3 with the fixing part and gas bag removed. [Figure 6] This is a side view showing the configuration shown in Figure 3 with the fixing part removed. [Figure 7] Figure 6 is a side view showing the configuration from a different direction. [Figure 8] This is a functional block diagram showing an example of the configuration of a detection device. [Figure 9] This is a perspective view showing an example of the configuration of a gas bag in an inflated state. [Figure 10] This is a perspective view showing an example of the configuration of a gas bag in a contracted state. [Figure 11] Figure 9 is a side view showing the gas bag as viewed from the positive X-axis direction. [Figure 12] This is a perspective view showing an example of the structure of the bag body in its inflated state. [Figure 13] This is a perspective view showing an example of the configuration of a reinforcing member. [Figure 14] This diagram shows the fixed part of the detection device and the gas bag before it is attached to the fixed part. [Figure 15] This is an enlarged view showing a portion of the fixing part of the detection device and the gas bag attached to the fixing part. [Figure 16] This is a side view showing the detection device with a contracted gas bag attached, viewed from the positive X-axis direction. [Figure 17] This is a perspective view showing the external appearance of the sensor unit related to this disclosure. [Figure 18] It is a perspective view showing the state where the lid is removed from the sensor unit shown in FIG. 17. [Figure 19] It is a sectional view taken along the line A-A' of the sensor unit shown in FIG. 17. [Figure 20] It is a sectional view taken along the line B-B' of the sensor unit shown in FIG. 17. [Figure 21] It is a schematic view showing the sensor chamber and the lid before being adhered. [Figure 22] It is a schematic view showing the internal structure of the detection device according to Embodiment 2 of the present disclosure. [Figure 23] It is a schematic view showing the configuration of the flow path box. [Figure 24] It is a sectional view taken along the line C-C' of the flow path box shown in FIG. 23. [Figure 25] It is a schematic view showing a plurality of plate-like members included in the flow path box.

Mode for Carrying Out the Invention

[0008] 〔Embodiment 1〕 Hereinafter, an embodiment of the present disclosure will be described in detail. FIG. 1 is a perspective view showing an example of the appearance of a detection device 1 according to the present disclosure. FIG. 2 is a view showing the state of the detection device 1 shown in FIG. 1 as viewed from the negative Y-axis direction. Hereinafter, the directions indicated by the X-axis, Y-axis, and Z-axis shown in FIGS. 3, 5, 6, 7, and 9 to 21 are the same as the directions indicated by the X-axis, Y-axis, and Z-axis shown in FIG. 1.

[0009] The detection device 1 collects a gas (hereinafter, the first gas) in a predetermined space and detects the type and concentration of a specific gas contained in the first gas. In the present embodiment, the detection device 1 will be described as being installed in a toilet bowl located in a toilet room. The toilet may be, for example, a flush toilet, but is not limited thereto. For example, part or all of the detection device 1 may be incorporated inside the toilet bowl or the toilet seat. The detection device 1 may collect the gas in the toilet bowl as the first gas in a predetermined space.

[0010] The specified gas is a gas originating from the subject and may be included in the first gas. In this disclosure, the specified gas may be, for example, a predetermined component contained in the gas generated from the subject's stool. The detection device 1 collects the gas containing the gas generated from the subject's stool as the first gas in a toilet bowl, which is a predetermined space, and detects the type and concentration of the specified gas contained in the first gas. The detection result of the specified gas may be used, for example, to present to the subject, or to estimate the state of the subject's intestinal environment, etc., using the detection result. In this disclosure, the detection device 1 that collects the gas in the toilet bowl as the first gas is given as an example. However, the detection device 1 is not limited to this configuration. For example, the detection device 1 may be configured to collect the gas in the toilet room where the toilet is installed as the first gas.

[0011] The applications of the detection device 1 are not limited to those described above. For example, the detection device 1 may be installed in a refrigerator, which is a designated space. In this case, the detection device 1 can acquire a gas containing a specific gas emitted from food as the first gas. For example, the detection device 1 may be installed in a factory or laboratory, which is a designated space. In this case, the detection device 1 can acquire a gas containing a specific gas emitted from chemicals, etc., as the first gas.

[0012] As shown in Figures 1 and 2, the detection device 1 comprises a housing 10 and a plurality of openings 40. The housing 10 houses the various parts of the detection device 1. As shown in Figure 1, the housing 10 may be composed of an upper housing 12 and a lower housing 11. The plurality of openings 40 are openings for taking in external gas into the detection device 1, or openings for discharging gas from inside the detection device 1 to the outside. As shown in Figure 2, the detection device 1 may have a first opening 41, a second opening 42, and a third opening 43 as the plurality of openings 40.

[0013] The first opening 41 is an opening for taking in the first gas to be supplied to the sensor 31. The first opening 41 may be exposed to the inside of the toilet bowl. For example, the first opening 41 may be located between the toilet bowl and the toilet seat. Alternatively, a portion of the first opening 41 may be embedded in the toilet seat. The first opening 41 may open toward the inside of the toilet bowl. The first opening 41 takes in a gas containing a specific gas generated from the stool discharged into the toilet bowl as the first gas, through the operation of a pump connected to the first opening 41.

[0014] The second opening 42 is an opening for introducing a second gas, different from the first gas, into the detection device 1. The second gas may be used to purge gas in various parts of the detection device 1, such as the sensor 31, the gas bag 20, and each flow path 70. The second opening 42 is located outside the toilet bowl. The second opening 42 may be exposed to the outside of the toilet bowl. Part of the second opening 42 may be embedded in the toilet seat. The second opening 42 may open outwards from the toilet. The second opening 42, through the operation of a pump connected to the second opening 42, introduces, for example, air (environmental gas) from the toilet room outside the toilet bowl as the second gas.

[0015] The third opening 43 is an opening for discharging gas located near the sensor 31, for example, inside the sensor unit 30. The third opening 43 can discharge gas to the outside of the toilet bowl. The third opening 43 is located outside the toilet bowl. The operation of the pump connected to the third opening 43 discharges exhaust gas from the sensor 31 to the outside via the flow path 70. This exhaust gas may contain the first and second gases after the detection process. In addition, the operation of the pump connected to the third opening 43 can discharge residual gas in the gas bag 20 to the outside of the detection device 1 via the flow path 70.

[0016] Figure 3 is a perspective view showing an example of the internal structure of the detection device 1 with the lower housing 11 removed. Figure 4 is a schematic diagram showing an example of the connection state of each part of the detection device 1. Figure 5 is a front view showing the configuration shown in Figure 3 with the fixing part 44 and gas bag 20 removed. Figure 6 is a side view showing the configuration shown in Figure 3 with the fixing part 44 removed. Figure 7 is a side view showing the configuration shown in Figure 6 viewed from a different direction. As shown in Figures 3 to 7, the detection device 1 includes a plurality of openings 40, a fixing part 44, a gas bag 20, a sensor 31, a sensor unit 30, a first pump 51, a second pump 52, and a plurality of valves 60. The detection device 1 also includes a plurality of flow paths 70. The first opening 41, the second opening 42, the third opening 43, the gas bag 20, the sensor unit 30, the first pump 51, the second pump 52, and the plurality of valves 60 may be connected by the plurality of flow paths 70. The detection device 1 also includes a circuit board 80.

[0017] As shown in Figure 4, the multiple flow paths 70 may include a first flow path 71, a second flow path 72, a third flow path 73, and a fourth flow path 74. The first flow path 71 may connect the first opening 41 and the sensor unit 30. The second flow path 72 may branch off from and merge with the first flow path 71. The gas bag 20 may be located on the second flow path 72. The third flow path 73 may connect the second opening 42 and the first flow path 71. As shown in Figure 4, the third flow path 73 may be connected to the first flow path 71 by a connector 101. The fourth flow path 74 may connect the sensor unit 30 and the third opening 43. Each opening and each flow path may be made of a tubular member such as a resin tube or a metal or glass pipe.

[0018] As shown in Figure 3, the gas bag 20 comprises a bag body 21 capable of storing gas and expanding and contracting with the inflow and outflow of the gas. The bag body 21 has an expandable / contractable section Q and a fixed end P located at a different location from where the expandable / contractable section Q is located. The bag body 21 may store a first gas or a gas other than the first gas. For example, the bag body 21 may temporarily store a second gas for cleaning the sensor 31. For example, the bag body 21 may temporarily store a first gas before it is supplied to the sensor 31. In the detection device 1, the fixed part 44 engages with the gas bag 20. The gas bag 20 is fixed to the fixed part 44 at the fixed end P.

[0019] The inflatable / collapsed portion Q may be located at an end of the bag body 21 different from the fixed end P. As shown in Figure 3, the inflatable / collapsed portion Q corresponds to a part of the surface located at a different location from the fixed end P. In the bag body 21, the entire surface on which the inflatable / collapsed portion Q is located may correspond to the inflatable / collapsed portion Q, or only a part of that surface may correspond to the inflatable / collapsed portion Q. Furthermore, the bag body 21 may have only one inflatable / collapsed portion Q, or it may have multiple inflatable / collapsed portions Q. In the bag body 21, the end on which the inflatable / collapsed portion Q is located may also be called the "inflatable / collapsed end." For example, the inflatable / collapsed end may be the part of the bag body 21 where the first member 212 and the second member 213 (described later) are bonded together. In the following, a configuration in which the bag body 21 has two inflatable / collapsed portions Q will be described as an example. Furthermore, in the following, a configuration in which the inflatable / collapsed portion Q has a gusset portion 211 that can be unfolded and folded will be described as an example of a configuration for the inflatable / collapsed portion Q to inflate and fold in the bag body 21. However, the configuration for the expansion and contraction of the expansion and contraction portion Q is not limited to the gusset portion 211. For example, the expansion and contraction portion Q may have a member having a bellows-like structure or a member made of an expandable material. In the bag body 21 according to this disclosure, the expansion and contraction portion Q may expand and contract as these members expand and contract.

[0020] Furthermore, the gas bag 20 may have a reinforcing member 22 located at the fixed end P. The reinforcing member 22 may be a member that reinforces the bag body 21. The reinforcing member 22 is attached to the fixed end P. If the gas bag 20 has a reinforcing member 22, the reinforcing member 22 and the fixing part 44 may engage. If the gas bag 20 is equipped with a reinforcing member 22, the gas bag 20 may be fixed to the fixing part 44 at the fixed end P by the engagement of the reinforcing member 22 and the fixing part 44. Specifically, as shown in Figure 3, the reinforcing member 22 may be attached to the fixing part 44. The fixing part 44 holds the reinforcing member 22 inside the housing 10. Furthermore, the fixing part 44 may function as a frame that defines the arrangement of each part inside the detection device 1.

[0021] In the following description, we will use as an example a configuration in which the gas bag 20 is equipped with a reinforcing member 22 and fixed to the fixing part 44 via the reinforcing member 22. However, the configuration for fixing the gas bag 20 to the fixing part 44 at the fixed end P is not limited to this. For example, the fixing part 44 may have a structure such as a clip. In this case, the clip may grip at least a part of the fixed end P of the gas bag 20. Alternatively, the detection device 1 may be configured such that the fixed end P of the gas bag 20 is bonded to the fixing part 44. The gas bag 20 can also be fixed to the fixing part 44 at the fixed end P by the configuration described above. Furthermore, the detection device 1 may employ yet another configuration to fix the gas bag 20 to the fixing part 44 at the fixed end P.

[0022] The bag body 21 may have a displacement end R located at a location different from the location where the expansion / contraction section Q is located. The displacement end R may face the fixed end P of the gas bag 20. The detection device 1 may further include a displacement end restricting section 45 in which the displacement end R is located. Furthermore, the displacement end restricting section 45 may include a displacement measuring section 451 for measuring the displacement of the displacement end R relative to the fixed end P. Details of the gas bag 20, the fixed section 44, the displacement end restricting section 45, and the displacement measuring section 451 will be described later.

[0023] Sensor 31 is a sensor for detecting the concentration or type of a specific gas contained in the gas supplied from the gas bag 20. The sensor 31 may be supplied with a first gas taken in from the gas bag 20 through the first opening 41. When the first gas is supplied from the gas bag 20, the sensor 31 outputs a signal corresponding to the concentration or type of the specific gas contained in the first gas. Sensor 31 may be housed inside the sensor unit 30.

[0024] The circuit board 80 is a board that includes a control unit 81 that controls the operation of the first pump 51, the second pump 52, and the plurality of valves 60. In addition to the control unit 81, the circuit board 80 may also include a storage unit for storing information used in the detection device 1 and a communication module for the detection device 1 to communicate with an external device.

[0025] Figure 8 is a functional block diagram showing an example of the configuration of the detection device 1. The control unit 81 controls the state of the multiple valves 60, the drive of the first pump 51, and the drive of the second pump 52. The multiple valves 60 may be able to switch the path through which the gas flows according to the control unit 81. The control unit 81 controls the state of the multiple valves 60 and also operates the first pump 51. As a result, the first gas taken in from the first opening flows into the gas bag 20 located on the flow path 70 through a part of the first flow path 71 and the second flow path 72. As a result, the bag body 21 of the gas bag 20 expands, and the first gas is stored in the gas bag 20.

[0026] Furthermore, the control unit 81 controls the state of the multiple valves 60 and also operates the second pump 52. As a result, the first gas flows out of the gas bag 20, and the first gas stored in the gas bag 20 flows into the sensor unit 30 through the second flow path 72 and the first flow path 71. This causes the bag body 21 of the gas bag 20 to contract. The first gas is also supplied to the sensor 31 in the sensor unit 30.

[0027] The control unit 81 may control the state of multiple valves 60 and operate the second pump 52 to supply the first gas taken in from the first opening 41 directly to the sensor 31 in the sensor unit 30 via only the first flow path 71, without going through the gas bag 20. The sensor 31 outputs a signal to the control unit 81 according to the concentration or type of a specific gas contained in the supplied first gas. Based on this signal, the control unit 81 detects the concentration or type of the specific gas contained in the first gas. The control unit 81 may also transmit information indicating the detected concentration or type of the specific gas to an external device.

[0028] The control unit 81 controls the state of the multiple valves 60 and also operates the second pump 52. As a result, the first gas flows out of the sensor unit 30 and is discharged from the third opening 43 through the fourth passage 74. The control unit 81 may also control the state of the multiple valves 60 and the operation of the second pump 52 so that the second gas is taken in through the second opening 42. The second gas taken in through the second opening 42 may be supplied to the sensor 31 in the sensor unit 30 through the third passage 73 and the first passage 71. Furthermore, the gas in the sensor unit 30 may be discharged from the third opening 43 through the fourth passage 74. As a result, the first gas remaining in the sensor unit 30 is purged by the second gas.

[0029] <Gas bag 20> Figure 9 is a perspective view showing an example of the configuration of the gas bag 20 in an inflated state. Figure 10 is a perspective view showing an example of the configuration of the gas bag 20 in a deflated state. Figure 11 is a side view showing the gas bag 20 shown in Figure 9 as viewed from the positive X-axis direction. Figure 12 is a perspective view showing an example of the configuration of the bag body 21 in an inflated state.

[0030] As shown in Figures 9 to 11, the gas bag 20 comprises a bag body 21 capable of storing gas and expanding and contracting with the inflow and outflow of the gas, and a reinforcing member 22 that reinforces the bag body 21. The bag body 21 has an expandable / contractable portion Q having a gusset portion 211, and a fixed end P located at a location different from where the expandable / contractable portion Q is located. The reinforcing member 22 is attached to the fixed end P. The bag body 21 may also have a displaced end R facing the fixed end P of the gas bag 20 and located at a location different from where the expandable / contractable portion Q is located. As an example, in the gas bag 20 shown in Figure 9, the end in the positive Y-axis direction may be the fixed end P, both ends in the X-axis direction may be the expandable / contractable portion Q, and the end in the negative Y-axis direction may be the displaced end R.

[0031] As shown in Figures 9 and 11, the bag body 21 comprises two gusset portions 211, a first member 212, and a second member 213. Hereafter, when the two gusset portions 211 are not distinguished, they will simply be referred to as "gusset portion 211". When the bag body 21 is empty of gas, the gusset portions 211 fold up into the contracted state shown in Figure 10. In the contracted state, the first member 212 and the second member 213 have a substantially planar shape. Hereafter, in the bag body 21, the surface parallel to the first member 212 when the bag body 21 is in the contracted state will also be referred to as the "surface of the bag body 21". The direction parallel to the surface of the bag body 21 will also be referred to as the "surface direction". The direction parallel to the XY plane shown in Figure 9 is the "surface direction".

[0032] In the contracted state shown in Figure 10, when gas flows into the bag body 21, the gusset portion 211 unfolds, resulting in the expanded state shown in Figure 9. As shown in Figure 9, the bag body 21 may be substantially rectangular in shape in the expanded state, and the pair of opposing faces of the substantially rectangular shape may be the gusset portion 211 that unfolds due to expansion. The substantially rectangular shape in this disclosure is not limited to a strictly rectangular shape. For example, the faces of the substantially rectangular shape are not limited to perfectly flat surfaces, but may have irregularities relative to the plane. Also, the faces and corners of the substantially rectangular shape may be rounded. Furthermore, the multiple faces of the substantially rectangular shape may be the same size and shape, or they may be different. Also, in the substantially rectangular shape, one face may be formed by a single sheet, or multiple sheets may overlap. Furthermore, the edges of the substantially rectangular shape are not limited to straight lines, but may be partially or entirely bent. Furthermore, the lengths of the multiple edges of the substantially rectangular shape may be the same, or they may be different.

[0033] More specifically, as shown in Figure 9, in the inflated state of the bag body 21, the fixed end P side and the displaced end R side of the gusset portion 211, the first member 212, and the second member 213 may correspond to two opposing faces (first face and second face) of a roughly rectangular parallelepiped shape. Also, in the inflated state of the bag body 21, the remaining parts of the two gusset portions 211 other than the first and second faces may correspond to two opposing faces of a roughly rectangular parallelepiped shape. Also, in the inflated state of the bag body 21, the remaining parts of the first member 212 and the second member 213 other than the first and second faces may correspond to two opposing faces of a roughly rectangular parallelepiped shape.

[0034] The bag body 21 has a pair of opposing expandable / contractable sections Q. When the bag body 21 expands, the gusset sections 211 of the expandable / contractable sections Q unfold to form a pair of opposing surfaces that are roughly rectangular in shape. In this way, the gusset sections 211 are positioned such that at least a portion of each of the two gusset sections 211 forms at least one opposing pair of surfaces out of the six surfaces that are roughly rectangular in shape. As a result, the stress in the planar direction toward the center of the surface of the bag body 21 that occurs in each of the expandable / contractable sections Q when the bag body 21 expands is reduced.

[0035] The bag body 21 may be constructed by bonding together two gusset portions 211, a first member 212, and a second member 213. For example, in the bag body 21, the gusset portions 211, the first member 212, and the second member may be bonded together by heat compression. Also, as shown in Figure 12, the bag body 21 may have an opening 214 located at the fixed end P. For example, when creating the bag body 21, the opening 214 may be formed by not bonding a portion of the first member 212 and the second member 213 at the fixed end P.

[0036] The gusset portion 211 deforms as the bag body 21 expands and contracts. The gusset portion 211 may be made of a material that has different deformation resistance than the first member 212 and the second member 213. Also, when the bag body 21 contracts, the gusset portion 211 may fold inward toward the inside of the bag body 21. With this configuration, when the gas bag 20 contracts within the housing 10, the gusset portion 211 does not spread outward toward the outside of the surface of the bag body 21, thus contributing to the miniaturization of the detection device 1. As shown in Figure 11, both the fixed end P and the displaced end R of the gusset portion 211 may be in a substantially triangular shape. This causes the gusset portion 211 to fold inward toward the inside of the bag body 21 when the gas bag 20 contracts within the housing 10.

[0037] Figure 13 is a perspective view showing an example of the configuration of the reinforcing member 22. The reinforcing member 22 reinforces the fixed end P of the bag body 21. The reinforcing member 22 may be made of a material that does not deform even when gas flows into or out of the bag body 21. A part of the reinforcing member 22 may be located inside the opening 214 of the bag body 21. By having a part of the reinforcing member 22 located inside the opening 214, the fixed end P of the bag body 21 is reinforced. By reinforcing the fixed end P with the reinforcing member 22, the degree of deformation when gas flows into or out of the bag body 21 is reduced compared to when it is not reinforced by the reinforcing member 22. The reinforcing member 22 and the opening 214 may be bonded by a method such as heat bonding, or by another method, such as using an adhesive. Furthermore, the reinforcing member 22 is not limited to a configuration in which a part is located inside the opening 214. For example, the reinforcing member 22 may not be located inside the opening 214, but a part of the reinforcing member 22 may be located so as to surround the outside of the opening 214.

[0038] Figure 14 shows the fixing part 44 of the detection device 1 and the gas bag 20 before it is attached to the fixing part 44. Figure 15 is an enlarged view showing a part of the fixing part 44 of the detection device 1 and the gas bag 20 attached to the fixing part 44. As shown in Figures 14 and 15, the fixing part 44 may be provided with claws 441. The reinforcing member 22 may also be provided with a plate-shaped portion (reference numeral 224). As shown in Figure 15, the reinforcing member 22 may be fixed to the fixing part 44 by fitting the plate-shaped portion of the reinforcing member 224, indicated by reference numeral 224, into the portion of the fixing part 44 that includes the claws 441. Also, as shown in Figure 3, the reinforcing member 22 may be sandwiched between the fixing part 44 and the upper housing 12.

[0039] According to the above configuration, the displacement of the reinforcing member 22 in the Z-axis direction is restricted by the claw 441, and the displacement in the Y-axis direction is restricted by the fixing part 44 and the upper housing 12. Because the reinforcing member 22 is fixed to the fixing part 44 of the detection device 1, even if the bag body 21 expands or contracts, the reinforcing member 22 and the fixed end P do not displace within the housing 10. Therefore, with this configuration, it is possible to more easily control the movement of the gas bag 20 within the housing 10.

[0040] When the bag body 21 expands, the fixed end P hardly displaces because it is fixed to the fixing part 44. Also, when the bag body 21 expands, the gusset part 211 unfolds in the expanding / contracting part Q, so the displacement of the expanding / contracting part Q toward the center of the bag body 21 is also reduced. Furthermore, unlike the fixed end P, the displaced end R is not fixed. Therefore, when the bag body 21 expands, the displaced end R can be displaced in a direction approaching the fixed end P. Also, when the bag body 21 contracts, the fixed end P and the expanding / contracting part Q hardly displace, and the displaced end R can be displaced in a direction away from the fixed end P. Hereinafter, the direction in which the fixed end P and the expanding / contracting part Q approach or move away from each other (the Y-axis direction in Figure 3) will be referred to as the "moving-away direction".

[0041] As described above, the gas bag 20 includes a fixed end P and an expandable / contractable portion Q that hardly displace when the bag body 21 expands or contracts, and a displaceable end R that can be displaced in the direction toward or away from the fixed end P. As a result, when the bag body 21 expands or contracts, only the displaceable end R is displaced in the direction toward or away from the bag, making it easier to control the movement of the gas bag 20 within the housing 10 during expansion and contraction.

[0042] As shown in Figure 13, the reinforcing member 22 may be provided with a first connecting channel 221 that connects the inside and outside of the bag body 21. For example, the first connecting channel 221 may have an opening 222 located on the outside of the bag body 21 when attached to the bag body 21, and an opening 223 located on the inside of the bag body 21 when attached to the bag body 21. In this way, the first connecting channel 221 may connect the channel 70 of the detection device 1 and the opening 214 of the bag body 21.

[0043] According to the above configuration, the gas flows in or out through the first connecting passage 221 of the reinforcing member 22. As a result, the inflow of gas into the bag body 21, or the outflow of gas from the bag body 21, occurs through the fixed end P reinforced by the reinforcing member 22. Therefore, the load on the bag body 21 when it expands or contracts is reduced compared to when the passage connecting the inside and outside of the bag body 21 is located in an unreinforced area, such as a surface or the gusset portion 211. Furthermore, the first connecting passage 221 may have two openings 222 located on the outside of the bag body 21 when attached to the bag body 21. As a result, the first connecting passage 221 can be connected to a passage 70 for introducing the first gas into the bag body 21, and a passage 70 for releasing the first gas from the bag body 21.

[0044] Furthermore, as shown in Figure 12, the bag body 21 may be provided with a second connecting passage 215 at the end opposite the fixed end P, which connects the inside and outside of the bag body 21. Specifically, the second connecting passage 215 may be located at the displaced end R. The second connecting passage 215 may communicate with the passage 70 of the detection device 1. There may be one second connecting passage 215 or there may be multiple second connecting passages. If the bag body 21 is provided with a second connecting passage 215, the gas may flow in from the first connecting passage 221 and flow out from the second connecting passage 215. The bag body 21 may be provided with both the opening 214 and the second connecting passage 215, or it may be provided with only the opening 214 and not the second connecting passage 215, or it may be provided with only the second connecting passage 215 and not the opening 214. If the bag body 21 is provided with only the second connecting passage 215 and not the opening 214, the reinforcing member 22 may not be provided with the first connecting passage 221.

[0045] Figure 16 is a side view showing the detection device 1, to which a contracted gas bag 20 is attached, as viewed from the positive X-axis direction. The detection device 1 may further include a displacement end restricting section 45 in which the displacement end R is located. As shown in Figure 16, the displacement end restricting section 45 may be connected to the fixing section 44 and may be a member having a slit shape. Alternatively, the displacement end R may be inserted into the slit shape of the displacement end restricting section 45. The displacement end R is displaced in the direction of moving toward and toward the inside of the displacement end restricting section 45 as the gas bag 20 expands and contracts. Because the displacement end R is located inside the displacement end restricting section 45, the displacement end restricting section 45 can reduce the degree of displacement in directions other than the direction of moving toward and toward the bag body 21, for example, in the direction in which the first member 212 and the second member 213 face each other.

[0046] Furthermore, as shown in Figure 16, the contracted gas bag 20 may be bent multiple times in the Z-axis direction. This allows a gas bag 20 in which the length between the fixed end P and the displacement end R is longer than the length between the fixed part 44 and the displacement end restricting part 45 in the contracted state to be accommodated in the detection device 1. Therefore, the need to enlarge the detection device 1 to match the size of the gas bag 20 is reduced, and the detection device 1 can be made smaller.

[0047] The displacement end R is displaced in the direction of separation as the bag body 21 of the gas bag 20 expands and contracts due to the inflow and outflow of gas. Here, the displacement end regulating unit 45 may include a displacement measuring unit 451 that measures the displacement of the displacement end R relative to the fixed end P. The displacement measuring unit 451 may be a sensor capable of measuring the displacement of the displacement end R relative to the fixed end P, in other words, the displacement of the displacement end R in the direction of separation. The displacement measuring unit 451 may also output a signal to the control unit 81 indicating the measured displacement of the displacement end R relative to the fixed end P. The control unit 81 may measure the displacement of the displacement end R relative to the fixed end P based on this signal.

[0048] The displacement end R is displaced in a direction toward the fixed end P when the bag body 21 of the gas bag 20 expands, and displaced in a direction toward the fixed end P when the gas bag 20 contracts. Therefore, by measuring the displacement of the displacement end R in the direction of separation, the displacement measuring unit 451 can determine whether the gas bag 20 is expanding or contracting normally.

[0049] Furthermore, the fixing part 44 may hold the gas bag 20 so as not to come into contact with the circuit board 80. Specifically, as shown in Figures 6 and 7, the gas bag 20 may be positioned on the opposite side of the circuit board 80, with the sensor unit 30, the first pump 51, and the flow path 70 in between. As shown in Figures 6 and 7, the fixing part 44 may hold the gas bag 20 in the above-described arrangement. The fixing part 44 may also have a plate-like portion. The gas bag 20 and the circuit board 80 may be separated by this plate-like portion.

[0050] When the circuit board 80 comes into contact with the gas bag 20, which repeatedly expands and contracts, the possibility of malfunction occurring in the circuit board 80 and the possibility of damage to the surface of the gas bag 20 that comes into contact with the circuit board 80 increase. With the above configuration, the possibility of malfunction occurring in the circuit board 80 and the possibility of damage to the surface of the gas bag 20 that comes into contact with the circuit board 80 can be reduced.

[0051] Conventionally, gas bags used in detection devices were made by folding a single sheet and gluing three sides together, or by gluing all four sides together of two sheets. When gas bags are made in this way, when the gas bag expands, stress is generated from multiple ends toward the center of the gas bag, and stress from multiple ends can concentrate at a single point on the surface.

[0052] For example, in a conventional gas bag with a structure in which the four sides of two sheets are bonded together, stress is generated on each side in the direction that opposing sides approach each other, and these stresses can concentrate at a single point on the surface of the sheet. In this case, the point where the stress is concentrated will bend when the gas bag expands and stretch when the gas bag contracts and becomes flat. For example, if stress is concentrated at a single point from three sides of the gas bag when it expands, this point may bend into a V-shape. Since the gas bag expands and contracts repeatedly each time the detection device takes a measurement, the point where the stress is concentrated in a conventional gas bag deforms many times, leading to an accumulation of load and making it prone to developing holes. Furthermore, it was difficult to control the location of deformation due to stress in conventional gas bags.

[0053] According to the gas bag 20 of this disclosure, the fixed end P is reinforced by a reinforcing member 22. Therefore, even if the bag body 21 expands or contracts, the degree of deformation of the fixed end P is small. Consequently, the stress generated from the fixed end P toward the center of the surface of the bag body 21 when the bag body 21 expands is reduced compared to the stress in the same direction if the fixed end P were not reinforced by the reinforcing member 22.

[0054] Furthermore, the gusset portion 211 is located at the expansion / contraction portion Q, which is at a different location from the fixed end P. When the bag body 21 expands or contracts, the gusset portion 211 deforms, so the stress generated in the expansion / contraction portion Q is consumed by the deformation of the gusset portion 211. Therefore, the stress generated from the expansion / contraction portion Q toward the center of the surface of the bag body 21 when the bag body 21 expands is reduced. In addition, the deformation of other parts of the bag body 21 is reduced by the deformation of the gusset portion 211.

[0055] As described above, the gas bag 20 provided in the detection device 1 according to this disclosure is equipped with a gusset portion 211, which reduces deformation of areas other than the gusset portion 211 when the bag body 21 expands or contracts. Furthermore, by being equipped with a reinforcing member 22 and a gusset portion 211, the gas bag 20 reduces the stress directed toward the center of the bag body 21 that occurs at the fixed end P and the expanding / contracting portion Q. As a result, in the gas bag 20, the areas that displace in response to the expansion and contraction of the gas bag 20 are limited to the gusset portion 211 and the displaced end R, and the stress generated in response to the expansion and contraction of the gas bag 20 is consumed at the gusset portion 211 and the displaced end R. Therefore, the possibility of stress concentrating from multiple directions at a single point on the surface of the bag body 21 in response to the expansion of the gas bag 20 is reduced, and a gas bag 20 with a longer lifespan can be realized.

[0056] <Sensor Unit 30> The following describes a sensor unit 30 equipped with a sensor 31. Figure 17 is a perspective view showing the external appearance of the sensor unit 30 according to this disclosure. Figure 18 is a perspective view showing the sensor unit 30 shown in Figure 17 with the lid 33 removed. The sensor unit 30 is a component that houses the sensor 31 inside. As shown in Figures 3 to 5, the sensor unit 30 is placed inside the detection device 1 and connected to each part by a flow path 70. The sensor unit 30 may be made of resin. By making the material of the sensor unit 30 from resin, injection molding becomes easier, enabling mass production and cost reduction.

[0057] As shown in Figure 17, the sensor unit 30 includes a sensor chamber 32 that houses a sensor 31 and a lid 33 that closes the sensor chamber 32. As shown in Figure 18, the sensor chamber 32 includes a groove 321 located on the surface facing the lid 33 and a first hole 322 through which the space where the sensor 31 is located communicates with the groove 321. Also, as shown in Figure 17, the sensor unit 30 is constructed by bonding the sensor chamber 32 and the lid 33 together. The sensor chamber 32 and the lid 33 may be bonded together by an adhesive portion 323, such as an adhesive, located around the groove 321 of the sensor chamber 32. Also, as shown in Figure 17, the sensor chamber 32 may be located on a substrate 34.

[0058] In the sensor unit 30, the groove 321 of the sensor chamber 32 and the lid 33 face each other to form a chamber channel 35. By covering the groove 321 of the sensor chamber 32 with the lid 33, the chamber channel 35 can be easily formed inside the sensor unit 30. Furthermore, since the groove 321 and the first hole 322 are in communication, the gas passing through the chamber channel 35 can be allowed to flow into the space where the sensor 31 is located via the first hole 322. In addition, since the chamber channel 35 is formed by the groove 321 and the lid 33, it is easier to form the chamber channel 35 inside the sensor unit 30 than by forming a through hole inside the sensor unit 30 to create a channel.

[0059] As shown in Figure 18, the sensor chamber 32 may be provided with a tubular member 324 that communicates with the groove 321 and protrudes from the sensor chamber 32. The tubular member 324 may also be connected to the flow path 70 of the detection device 1. This makes it possible to allow the gas flowing through the flow path 70 of the detection device 1 to flow into the sensor unit 30, and to allow the gas flowing through the chamber flow path 35 of the sensor unit 30 to flow out into the flow path 70 of the detection device 1.

[0060] Figure 19 is a cross-sectional view of the sensor unit 30 shown in Figure 17, taken along the line A-A'. In the sensor unit 30, one of the groove portion of the sensor chamber 32 and the lid 33 may have a step 325, and the other may have a protrusion 331 that engages with the step. For example, as shown in Figure 19, the groove portion 321 of the sensor chamber 32 may have a step 325, and the lid 33 may have a protrusion 331. Alternatively, the groove portion 321 of the sensor chamber 32 may have a protrusion 331, and the lid 33 may have a step 325. By providing a step 325 and a protrusion 331, the occurrence of misalignment when combining the sensor chamber 32 and the lid 33 can be reduced.

[0061] As shown in Figure 19, the portion 332 of the lid 33 facing the groove 321 may be recessed. This allows for a larger cross-sectional area of ​​the chamber flow path 35 than when the portion 332 facing the groove 321 of the lid 33 is flat. The step 325 and the protrusion 331 may be used to align the sensor chamber 32 and the lid 33. As shown in Figure 19, the step 325 and the protrusion 331 do not need to be in contact.

[0062] Figure 20 is a cross-sectional view of the sensor unit 30 shown in Figure 17, taken along the line B-B'. In this disclosure, the detection device 1 may include a plurality of sensors 31 of different sizes. As shown in Figure 20, the sensor unit 30 may include a height adjustment member 326 for aligning the upper ends of the plurality of sensors 31 of different sizes. Within the sensor unit 30, each of the plurality of sensors 31 may be arranged such that the distance between the sensor 31 and the groove 321 of the sensor chamber 32 is the same.

[0063] Specifically, as shown in Figure 20, a height adjustment member 326 may be located on the substrate 34. The relatively small sensor 31A may be located on the height adjustment member 326, and the relatively large sensor 31B may be located on the substrate 34. This ensures that the upper ends of the small sensor 31A and the large sensor 31B, in other words, the ends of each sensor 31 in the negative Z-axis direction are aligned.

[0064] With the above configuration, the distance from the chamber channel 35 to the upper end of the multiple sensors 31 is approximately constant. This reduces the need to bend the chamber channel 35 in the direction in which the sensor chamber 32 and the lid 33 face each other, in other words, in the direction shown on the Z axis in Figure 20, to match the size of the sensors 31, and simplifies the structure of the chamber channel 35. Furthermore, with the above configuration, the simplification of the structure of the chamber channel 35 reduces the resistance generated when gas flows within the chamber channel 35.

[0065] Figure 21 is a schematic diagram showing the sensor chamber 32 and lid 33 before bonding. As shown in Figure 21, the lid 33 may have a plurality of second holes 333. The sensor chamber 32 may have a plurality of projections 327 that engage with the second holes 333. In the sensor unit 30, the lid 33 and the sensor chamber 32 may be aligned by inserting the projections 327 of the sensor chamber 32 into the second holes 333 of the lid 33. As shown by reference numeral 2101 in Figure 21, the sensor chamber 32 and the lid 33 may be bent in the stacking direction in which their opposing surfaces are stacked. The stacking direction can also be expressed as the direction shown on the Z axis in Figure 21. The chamber channel 35 formed at the bent portion (reference numeral 2101) of the sensor chamber 32 and lid 33 is bent in the stacking direction.

[0066] As shown in Figure 21, the projection 327A located closer to the opposite side of the sensor chamber 32 to the side facing the lid 33 may be longer than the projection 327B located further away from the opposite side. If a misalignment occurs between the sensor chamber 32 and the lid 33 at the slope portion where the chamber's internal flow path 35 bends in the stacking direction, a large gap will be created in the chamber's internal flow path 35, causing gas leakage.

[0067] In this case, in the sensor unit 30, the length of the projection 327A located near the opposite side of the sensor chamber 32 from the side facing the lid 33 is longer than the projections 327B at other locations. As a result, when the sensor chamber 32 and the lid 33 are assembled, the portion of the sensor unit 30 near projection 327A is aligned before the portions near other projections 327. This allows for more precise alignment of the portion of the chamber's internal flow path 35 that bends in the stacking direction, thereby reducing misalignment and gaps.

[0068] [Embodiment 2] Other embodiments of this disclosure are described below. For convenience of explanation, components having the same function as those described in the above embodiments are denoted by the same reference numerals, and their descriptions are not repeated. Figure 22 is a schematic diagram showing the internal structure of the detection device 1A according to Embodiment 2.

[0069] The detection device 1A includes a flow path 93 through which gas can pass. The detection device 1A may include the flow path 93 in place of some of the multiple flow paths 70 that are present in the detection device 1 according to Embodiment 1. Also, as shown in Figure 22, the detection device 1A includes a flow path box 90.

[0070] The flow path box 90 is a substantially box-shaped member with a flow path 93 formed inside. The flow path 93 of the flow path box 90 is a flow path that can replace at least some of the functions of the multiple flow paths 70 provided in the detection device 1 according to Embodiment 1. The flow path box 90 may be made of resin. By making the material of the flow path box 90 resin, injection molding becomes easier, enabling mass production and cost reduction.

[0071] Figure 23 is a schematic diagram showing the configuration of the flow path box 90. Figure 24 is a cross-sectional view of the flow path box 90 shown in Figure 23, taken along the line C-C'. Figure 25 is a schematic diagram showing the plurality of plate-shaped members 92 provided in the flow path box 90. As shown in Figure 24, the flow path box 90 is constructed by stacking a plurality of plate-shaped members 92, each having a groove 91, on top of each other. As shown in Figures 24 and 25, each groove 91 of the plurality of plate-shaped members 92 is located on the surface of the plate-shaped member 92. Also, as shown in Figure 25, in the flow path box 90, the grooves 91 of adjacent plate-shaped members 92 face each other to form a flow path 93. As a result, the flow path 93 in the flow path box 90 of the detection device 1A can replace at least some of the functions of the plurality of flow paths 70 provided by the detection device 1 according to Embodiment 1.

[0072] By providing a flow path box 90 in the detection device 1A, it is not necessary to connect a large number of tubes that make up the flow path 70 when assembling the detection device 1A. Therefore, the number of steps required to assemble the detection device 1A is reduced, and the assembly of the detection device 1A can be made easier. In addition, the flow path box 90 can be made simply by bonding multiple plate-shaped members 92 together. Therefore, by adopting the flow path box 90, the occurrence of assembly errors such as incorrect connections due to wrongly connecting the tubes that make up the flow path 70 can be reduced.

[0073] Furthermore, creating internal flow channels by drilling holes in a single box-shaped block is costly and unsuitable for mass production. In contrast, since the flow channel box 90 is constructed by stacking multiple plate-shaped members 92, each having a groove 91, it is possible to easily form a three-dimensional and complex internal flow channel structure. Therefore, with the above configuration, mass production and cost reduction of flow channel boxes 90 with complex internal flow channels can be achieved.

[0074] As shown in Figures 24 and 25, at least one plate-like member 92 may have through holes 94 along the direction in which the plate-like members 92 are stacked as flow channels 93. With the above configuration, not only flow channels 93 along the surface of the plate-like member 92 but also flow channels 93 in the stacking direction can be formed. This makes it possible to form flow channels 93 with even more complex three-dimensional structures. The grooves 91 and through holes 94 shown in Figures 24 and 25 are examples. For example, each plate-like member 92 may have grooves 91 and through holes 94 having shapes corresponding to the desired flow channel 93 structure.

[0075] In the flow path box 90, adjacent plate-shaped members 92 may be bonded together with tape having adhesive surfaces on both sides. Generally, welding is used to bond resins together, but using tape makes it easy to bond the plate-shaped members 92 together and ensure the airtightness of the flow path 93. However, adjacent plate-shaped members 92 may also be bonded together using a general method for bonding resins together, such as welding.

[0076] In the detection device 1A, the flow path 93 of the flow path box 90 may be directly connected to other components of the detection device 1A, or it may be connected via a resin tube or the like that which constitutes the flow path 70. For example, as shown in Figure 22, the sensor unit 30, the first pump 51, and the valve 60 may be connected to the flow path box 90. Alternatively, as shown in Figure 23, the flow path 93 of the flow path box 90 and the valve 60 may be directly connected without a tube.

[0077] The flow path box 90 may be connected to the sensor unit 30 described in Embodiment 1 via the flow path 70. Alternatively, as shown in Figure 24, the flow path box 90 may be directly connected to the sensor unit 30 described in Embodiment 1 without going through the flow path 70. When the flow path box 90 and the sensor unit 30 are directly connected, the sensor unit 30 does not have a cover 33, and the surface of the flow path box 90 facing the sensor unit 30 may substitute for the function of the cover 33 of the sensor unit 30.

[0078] When the flow path box 90 and the sensor unit 30 are directly connected, the groove 321 of the sensor chamber 32 and the groove 91 of the flow path box 90 may face each other to form the flow path 35 inside the chamber of the sensor unit 30. With this configuration, the flow path box 90 and the sensor unit 30 can be directly connected, thus reducing the effort required to separately connect the flow path box 90 and the sensor unit 30 with a flow path tube during assembly.

[0079] The inventions described in this disclosure have been explained above based on the drawings and embodiments. However, the inventions described in this disclosure are not limited to the embodiments described above. That is, the inventions described in this disclosure can be modified in various ways within the scope shown in this disclosure, and embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the inventions described in this disclosure. In other words, it should be noted that it is easy for those skilled in the art to make various modifications or alterations based on this disclosure. Furthermore, it should be noted that these modifications or alterations are included in the scope of this disclosure.

[0080] 〔summary〕 A detection device according to Embodiment 1 of the present disclosure comprises a gas bag having a bag body capable of storing gas and expanding and contracting in response to the inflow and outflow of the gas, a fixing part that engages with the gas bag, and a sensor for detecting the concentration or type of a specific gas contained in the gas supplied from the gas bag, wherein the bag body has an expandable and contractible part and a fixed end located at a location different from the location where the expandable and contractible part is located, and the gas bag is fixed to the fixing part at the fixed end.

[0081] In the detection device according to aspect 2 of this disclosure, the expansion and contraction portion may have a gusset portion in aspect 1 described above.

[0082] In the detection device according to embodiment 3 of the present disclosure, in embodiment 1, the gas bag has a reinforcing member located at the fixed end, and the reinforcing member and the fixed portion may be engaged.

[0083] In the detection device according to embodiment 4 of the present disclosure, in embodiment 3, the bag body has an opening located at the fixed end, and a portion of the reinforcing member may be located inside the opening.

[0084] In the detection device according to aspect 5 of the present disclosure, in aspect 3 or 4, the reinforcing member may be provided with a first connecting channel that communicates the inside and outside of the bag body.

[0085] In any of the embodiments 1 to 5 described above, the detection device according to embodiment 6 of the present disclosure may further include a second connecting channel at the end opposite to the fixed end, which connects the inside and outside of the bag body.

[0086] In the detection device according to embodiment 7 of the present disclosure, in embodiment 2, the bag body is substantially rectangular in shape when inflated, and the pair of opposing surfaces of the substantially rectangular shape may be the gusset portion that unfolds due to inflation.

[0087] The detection device according to embodiment 8 of the present disclosure, in any of embodiments 1 to 7 above, has a displacement end that faces the fixed end of the gas bag and is located at a location different from the location where the expansion and contraction portion is located, and the detection device may further include a displacement end restricting portion in which the displacement end is located inside.

[0088] In the detection device according to embodiment 9 of the present disclosure, in embodiment 8, the displacement end is displaced as the gas bag expands and contracts due to the inflow and outflow of the gas, and the displacement end regulating unit may include a displacement measuring unit for measuring the displacement of the displacement end relative to the fixed end.

[0089] In any of the embodiments 1 to 9 described above, the detection device further comprises a circuit board, and the fixing portion may hold the gas bag so as not to come into contact with the circuit board.

[0090] A detection device according to embodiment 11 of the present disclosure comprises a sensor unit having a sensor chamber for housing the sensor and a lid for closing the sensor chamber, wherein the sensor chamber has a groove located on a surface facing the lid and a first hole through which the space in which the sensor is located communicates with the groove, and the groove of the sensor chamber and the lid may face each other to form a flow path within the chamber.

[0091] In the detection device according to embodiment 12 of the present disclosure, in embodiment 11, one of the groove portion and the lid of the sensor chamber may have a step, and the other may have a protrusion that engages with the step.

[0092] The detection device according to embodiment 13 of the present disclosure comprises, in embodiment 11 or 12, a plurality of sensors of different sizes and a height adjustment member for aligning the positions of the upper ends of the plurality of sensors, wherein within the sensor unit, each of the plurality of sensors may be arranged such that the distance between the sensor and the groove of the sensor chamber is the same.

[0093] A detection device according to embodiment 14 of the present disclosure, in any of embodiments 11 to 13, wherein the sensor chamber and the lid are bent in a stacking direction in which opposing surfaces are stacked, the lid has a plurality of second holes, the sensor chamber has a plurality of projections that engage with the second holes, and the projections of the sensor chamber located closer to the surface opposite to the surface facing the lid may be longer than the projections located further away from the opposite surface.

[0094] In the detection device according to embodiment 15 of this disclosure, the sensor unit may be made of resin in any of embodiments 11 to 14.

[0095] A detection device according to embodiment 16 of the present disclosure comprises, in any of embodiments 1 to 15 above, a flow path through which a gas can pass, and a flow path box in which the flow path is located, wherein the flow path box is constructed by stacking a plurality of plate-like members having grooves, and the grooves of adjacent plate-like members may face each other to constitute the flow path.

[0096] In the detection device according to embodiment 17 of the present disclosure, in embodiment 16, at least one of the plate-shaped members may have a through hole in the direction in which the plate-shaped members are stacked as the flow path.

[0097] In the detection device according to embodiment 18 of this disclosure, the flow path box may be made of resin in embodiment 16 or 17.

[0098] In the detection device according to embodiment 19 of this disclosure, in any of embodiments 16 to 18, adjacent plate-shaped members may be bonded together with tape having adhesive surfaces on both sides.

[0099] A detection device according to embodiment 20 of the present disclosure has a sensor chamber for housing the sensor in any of embodiments 16 to 19, wherein the sensor chamber comprises a groove located on a surface facing the flow path box and a hole through which the space in which the sensor is located communicates with the groove of the sensor chamber, and the groove of the sensor chamber and the groove of the flow path box may face each other to form a flow path within the chamber. [Explanation of Symbols]

[0100] 1. 1A detection device 20 Gas Bags 21 Bag body 22 Reinforcement members 211 Gusset 214 Aperture 215 Second connecting channel 221 First connecting channel 30 Sensor Units 31 Sensors 32 Sensor Chamber 33 Lid 321 Groove of the sensor chamber 325 steps 331 Convex part 322 Hole 1 326 Height adjustment member 333 Second hole 327 Protrusion 35 Chamber channel 44 Fixed part 45 Displacement end restricting section 451 Displacement Measurement Unit 80 Circuit boards 90 flow path box 91 Groove portion of plate-shaped member 92 Plate-shaped member 93 Channels 94 Through holes P fixed end Q: Expanding and contracting part R Displacement End

Claims

1. A gas bag comprising a bag body capable of storing gas and which expands and contracts in response to the inflow and outflow of the gas, A fixing portion that engages with the gas bag, The system includes a sensor that detects the concentration or type of a specific gas contained in the gas supplied from the gas bag, The bag body has an expandable and contractible portion and a fixed end located at a location different from the location where the expandable and contractible portion is located. The gas bag is fixed to the fixed portion at the fixed end. Detection device.

2. The detection device according to claim 1, wherein the expansion and contraction portion has a gusset portion.

3. The gas bag has a reinforcing member located at the fixed end, The detection device according to claim 1, wherein the reinforcing member and the fixing part engage with each other.

4. The bag body has an opening located at the fixed end, The reinforcing member is such that a portion of it is located inside the opening. The detection device according to claim 3.

5. The reinforcing member is provided with a first connecting channel that connects the inside and outside of the bag body. The detection device according to claim 4.

6. The bag body further includes a second connecting channel at the end opposite to the fixed end, which connects the inside and outside of the bag body. The detection device according to claim 5.

7. The bag body is approximately rectangular in shape when inflated. The pair of opposing surfaces of the aforementioned roughly rectangular parallelepiped shape are the gusset portion that unfolds due to expansion. The detection device according to claim 2.

8. The bag body has a displacement end that faces the fixed end of the gas bag and is located at a different location from the location where the expansion and contraction portion is located. The detection device further comprises a displacement end restricting section in which the displacement end is located internally. The detection device according to claim 1.

9. The aforementioned displaced end is displaced as the gas bag expands and contracts due to the inflow and outflow of the gas. The displacement end restricting section includes a displacement measuring section that measures the displacement of the displacement end relative to the fixed end. The detection device according to claim 8.

10. The detection device further comprises a circuit board, The fixing part holds the gas bag so as not to come into contact with the circuit board. The detection device according to claim 1.

11. The sensor unit comprises a sensor chamber for housing the sensor and a lid for closing the sensor chamber, The aforementioned sensor chamber is A groove located on the surface facing the lid, The system includes a first hole through which the space where the sensor is located and the groove communicate, The groove of the sensor chamber and the lid face each other to form a flow path within the chamber. The detection device according to claim 1.

12. One of the groove and the lid of the sensor chamber has a step, and the other has a protrusion that engages with the step. The detection device according to claim 11.

13. Multiple sensors of different sizes, The system includes a height adjustment member for aligning the upper ends of multiple sensors, Within the sensor unit, each of the plurality of sensors is arranged such that the distance between the sensor and the groove of the sensor chamber is the same. The detection device according to claim 11.

14. The sensor chamber and the lid are bent in the stacking direction in which their opposing surfaces are stacked. The aforementioned lid is provided with a plurality of second holes, The sensor chamber is provided with a plurality of protrusions that engage with the second hole, The projection of the sensor chamber located near the surface opposite to the surface facing the lid is longer than the projection located further away from the opposite surface. The detection device according to claim 11.

15. The aforementioned sensor unit is made of resin. The detection device according to claim 11.

16. A passage through which gas can pass, The system comprises a flow path box in which the flow path is located, The flow path box is constructed by stacking a plurality of plate-shaped members, each having a groove, and the grooves of adjacent plate-shaped members face each other to form the flow path. The detection device according to claim 1 or 11.

17. At least one of the plate-like members has through holes in the direction in which the plate-like members are stacked as the flow channels. The detection device according to claim 16.

18. The aforementioned flow path box is made of resin. The detection device according to claim 16.

19. The detection device according to claim 16, wherein adjacent plate-shaped members are bonded together with tape having adhesive surfaces on both sides.

20. It has a sensor chamber that houses the aforementioned sensor, The aforementioned sensor chamber is A groove located on the surface facing the flow path box, The sensor chamber comprises a hole through which the space in which the sensor is located communicates with the groove of the sensor chamber, The groove of the sensor chamber and the groove of the flow path box face each other to form a flow path within the chamber. The detection device according to claim 16.

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