Gas sensing apparatus

Abstract

A gas sensing apparatus, comprising a housing and a gas sensing assembly. The gas sensing assembly comprises a gas detection probe, a circuit board, and a cable, the gas detection probe and the cable both being electrically connected to the circuit board. The gas detection probe is at least partially contained in the housing, the circuit board is at least partially contained in the housing, and the cable is at least partially contained in the housing. The cable and the housing have a first state and a second state; in the first state, the cable is fixedly connected or limitedly connected to the housing, and in the second state, the cable is separated from the housing. The connection between the cable and the housing can be switched from the second state to the first state. In the present application, when stress at the connection point between the cable and the circuit board is reduced, the cable and the housing can be disassembled, facilitating assembly of the gas sensing apparatus.

Description

Gas sensing device

[0001] This application claims priority to two Chinese patent applications filed with the China Patent Office on July 20, 2023, with application number 202310894752.6 and invention name “Gas Sensing Device”, and two Chinese patent applications filed with the China Patent Office on the same day, with application number 202310900013.3 and invention name “Gas Sensing Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of gas detection, and in particular to a gas sensing device. Background Art

[0003] The gas sensing device includes a housing and a gas sensing assembly. The gas sensing assembly includes a gas detection probe, a circuit board, and a cable. The gas detection probe is used to detect gas and generate signals. The cable is connected to the circuit board to output signals. The gas sensing assembly is at least partially housed within the housing. When pulled by external forces, the cable can easily loosen or even detach from the circuit board, affecting signal transmission. Related technologies fix the cable to the housing in a non-detachable connection, such as using the cable as an insert in an injection-molded housing, thereby reducing the force at the connection between the cable and the circuit board. However, this is not convenient for assembling the gas sensing device.

[0004] Summary of the Invention

[0005] The present application aims to provide a gas sensing device that is easy to assemble.

[0006] The gas sensing device provided in the present application includes a housing and a gas sensing assembly, wherein the gas sensing assembly includes a gas detection probe, a circuit board, and a cable, wherein the gas detection probe and the cable are both electrically connected to the circuit board;

[0007] The housing has an inner cavity, the gas detection probe and the circuit board are at least partially located in the inner cavity, and the cable is at least partially located in the inner cavity where the circuit board is located;

[0008] The cable and the housing have a first state and a second state. In the first state, the cable and the housing are fixedly connected or limit-connected. In the second state, the cable and the housing are separated. The connection between the cable and the housing can be switched from the second state to the first state.

[0009] In this application, the cable and housing have a first state and a second state. In the first state, the cable and housing are fixedly connected or positionally connected, and in the second state, the cable and housing are separated. This reduces the stress at the connection between the cable and the circuit board, and allows for detachable cable and housing, facilitating assembly of the gas sensing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] FIG1 is a perspective view of a gas sensing device provided in one embodiment of the present application;

[0011] FIG2 is an exploded view of a gas sensing device provided in one embodiment of the present application;

[0012] FIG3 is a perspective view of a first housing provided in one embodiment of the present application;

[0013] FIG4 is a perspective view of a first housing provided in one embodiment of the present application;

[0014] FIG5 is a perspective view of a first housing provided in one embodiment of the present application;

[0015] FIG6 is a perspective view of a second housing provided in one embodiment of the present application;

[0016] FIG7 is a cross-sectional schematic diagram of a first housing and a second housing in a second mating state provided by an embodiment of the present application;

[0017] FIG8 is a cross-sectional schematic diagram of a first housing and a second housing in a second mating state provided by an embodiment of the present application;

[0018] FIG9 is a cross-sectional view of a gas sensing device provided in one embodiment of the present application;

[0019] FIG10 is a perspective view of a gas sensor assembly provided in one embodiment of the present application;

[0020] FIG11 is a schematic diagram of a cable and a housing in a first state provided by an embodiment of the present application;

[0021] FIG12 is a cross-sectional view of a cable and a housing in a first state provided by an embodiment of the present application;

[0022] FIG13 is a schematic diagram of a cable provided in one embodiment of the present application;

[0023] FIG14 is a schematic diagram of a position limiting member provided in one embodiment of the present application;

[0024] FIG15 is a perspective view of a gas sensing device provided in another embodiment of the present application;

[0025] FIG16 is an exploded view of a gas sensing device provided in another embodiment of the present application;

[0026] FIG17 is a perspective view of a first housing provided in another embodiment of the present application;

[0027] FIG18 is a perspective view of a second housing provided in another embodiment of the present application;

[0028] FIG19 is a cross-sectional schematic diagram of a first housing and a second housing in a second mating state provided by another embodiment of the present application;

[0029] FIG20 is a cross-sectional view of a cable and a housing in a first state provided by another embodiment of the present application;

[0030] FIG21 is a schematic diagram of a cable provided in another embodiment of the present application. DETAILED DESCRIPTION

[0031] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0032] It should be clear that the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0033] The gas sensing device 100 includes a housing 1 and a gas sensing assembly 2, such as shown in Figures 1 and 2, or as shown in Figures 15 and 16. The gas sensing assembly 2 includes a gas detection probe 21, a circuit board 22 and a cable 3. The gas detection probe 21 is used to detect gas and generate signals. The cable 3 is connected to the circuit board 22 for outputting signals. The gas sensing assembly 2 is at least partially accommodated in the housing 1. The cable 3 is easily loosened or even detached from the circuit board 22 when pulled by external force, affecting signal transmission. The related art fixedly connects the cable 3 to the housing 1, for example, using the cable 3 as an insert for injection molding the housing 1 for accommodating the gas sensing assembly 2, thereby reducing the force at the connection between the cable 3 and the circuit board 22. However, this is not convenient for the assembly of the gas sensing device 100. Therefore, it is necessary to improve the structure of the gas sensing device 100 to facilitate its assembly.

[0034] The present application provides a gas sensing device 100 that is easy to assemble, comprising a housing 1 and a gas sensing assembly 2, with the gas sensing assembly 2 at least partially housed within the housing 1. The gas sensing assembly 2 includes a gas detection probe 21, a circuit board 22, and a cable 3, as shown in FIG10 . The gas detection probe 21 and the cable 3 are both electrically connected to the circuit board 22. The housing has an inner cavity 10, with at least a portion of the gas detection probe 21 and at least a portion of the circuit board 22 located within the inner cavity 10. The cable 3 is at least partially located within the inner cavity 10 where the circuit board 22 is located. The cable 3 and the housing 1 have a first state and a second state. In the first state, the cable 3 is fixedly connected or positionally connected to the housing 1, as shown in FIG11 , FIG12 , and FIG20 . In the second state, the cable 3 is separated from the housing 1. The connection between the cable 3 and the housing 1 can be switched from the first state to the second state, and the connection between the cable 3 and the housing 1 can be switched from the second state to the first state. The present application can realize the detachability of the cable 3 and the housing 1 while reducing the stress on the connection between the cable 3 and the circuit board 22 . Moreover, such detachment will not damage the structure of the housing 1 , thereby facilitating the assembly of the gas sensor device 100 .

[0035] In the present application, the gas detection probe 21 is used to generate an electrical signal based on changes in the parameters (e.g., concentration) of the gas to be detected. Other processing components may also be provided on the circuit board 22 to process the electrical signal, and the cable 3 outputs the processed electrical signal. In some embodiments, the cable 3 is directly connected to the circuit board 22.

[0036] In some embodiments, the cable 3 is at least partially flexible and is directly connected to the circuit board 22, as shown in Figure 10. For example, the cable 3 includes an enameled wire. In some embodiments, the cable 3 includes a bundle of at least two enameled wires.

[0037] In some embodiments, the cable 3 includes a main body 31 and a limiting portion 32. The limiting portion 32 is fixedly connected or limitatively connected to the main body 31. The limiting portion 32 protrudes from the main body 31 and is used to be limitatively connected to the housing 1, as shown in Figure 2.

[0038] In some embodiments, the cable 3 includes a main body 31 and a stopper 4, wherein the stopper 4 includes a stopper 32. The main body 31 and the stopper 4 have a third connection state and a fourth connection state. In the third connection state, the main body 31 and the stopper 4 are fixedly connected or limitatively connected, as shown in FIG12 , for example. In the fourth connection state, the main body 31 and the stopper 4 are separated, as shown in FIG13 or FIG21 . The connection between the main body 31 and the stopper 4 can be switched from the fourth connection state to the third connection state. In other words, the main body 31 and the stopper 4 are detachably connected, and such detachment does not damage the structure of the main body 31 and the stopper 32. In some embodiments, the main body 31 includes a single conductor, or a wiring harness formed by two or more conductors. For example, as shown in FIG2 , the main body 31 includes two or three enameled wires and a sleeve that is sleeved over the two or three enameled wires to fix the two or three enameled wires relative to each other to form a wiring harness.

[0039] In some embodiments, the limiting member 4 also includes a main body 41. The main body 41 has a through hole 42, and the through hole 42 is set to pass through the main body 41. The main body 41 includes an inner side and an outer side, the inner side is located outside the through hole 42, and the outer side is away from the through hole 42 relative to the inner side. The limiting portion 32 is connected to the outer side, and the limiting portion 32 protrudes from the outer side, as shown in Figure 14. In some embodiments, the limiting portion 32 and the main body 41 are an integral part. In some embodiments, the limiting member 4 is an elastic member or a flexible member, for example, the limiting member 4 is made of rubber. Through the through hole 42, the limiting member 4 can be sleeved outside the main body 31. When the limiting member 4 is sleeved outside the main body 31, the main body 31 is at least partially located in the through hole 42, the main body 31 passes through the through hole 42, and the main body 31 passes through the limiting member 4. The inner side surface of the main body portion 41 contacts the main body portion 31 , and the inner side surface and the main body portion 31 are frictionally engaged, thereby achieving relative fixation or limiting of the limiting member 4 and the main body portion 31 .

[0040] In some embodiments, the stopper 4 is movably connected to the main body 31. This movable connection allows the position of the connection between the main body 31 and the stopper 4 to be changed. It is understood that by changing the relative position of the stopper 4 and the main body 31, the length of the cable 3 within the housing 1 can be adjusted, thereby adjusting the tightness of the connection between the cable 3 and the circuit board 22.

[0041] In some embodiments, the through hole 42 has a first opening 421 and a second opening 422 . Along the extension direction of the through hole 42 , the first opening 421 and the second opening 422 are respectively located on both sides of the limiting member 4 , as shown in FIG. 13 and FIG. 14 .

[0042] In some embodiments, the retaining portion 32 includes a first retaining portion 321 having a first surface 3211 and a second surface 3212. Along the extension direction of the through hole 42, the first surface 3211 is closer to the first opening 421 than the second surface 3212. The first retaining portion 321 has a retaining groove 324, which is recessed from the first surface 3211 toward the interior of the first retaining portion 321. The first retaining portion 321 has a third surface 3213 and a fourth surface 3214, respectively located on either side of the first retaining portion 321 in a direction perpendicular to the extension direction of the through hole 42. The retaining groove 324 extends through the third surface 3213 or the fourth surface 3214. The housing 1 is at least partially positioned within the retaining groove 324, thereby enabling the housing 1 to retain the retaining member 4 and, in turn, the cable 3. Specifically, the limiting groove 324 includes a first limiting groove 3241 and a second limiting groove 3242. The first limiting groove 3241 passes through the third surface 3213, and the second limiting groove 3242 passes through the fourth surface 3214. In a direction perpendicular to the extension direction of the through hole 42, the first limiting groove 3241 and the second limiting groove 3242 are respectively located on both sides of the first limiting portion 321.

[0043] In some embodiments, the first stopper 321 protrudes from one side of the main body 41 in a direction perpendicular to the extension direction of the through hole 42. In some embodiments, the first stopper 321 has a structure similar to a cube or a cuboid. With the plane perpendicular to the extension direction of the through hole 42 as the first projection plane, the projection of the first stopper 321 along the extension direction of the through hole 42 on the first projection plane is a rectangle or a square.

[0044] In some embodiments, the limiting portion 32 includes a second limiting portion 322, which is spaced apart from the first limiting portion 321. Along the extension direction of the through hole 42, the second limiting portion 322 is closer to the first opening 421 relative to the first limiting portion 321. In some embodiments, the second limiting portion 322 protrudes from the circumference of the main body 41 in a direction perpendicular to the extension direction of the through hole 42. For example, as shown in FIG. 14 or FIG. 21, the second limiting portion 322 is annular. In some embodiments, along the extension direction of the through hole 42, the second limiting portion 322 includes a fifth surface 3221 and a sixth surface 3222. Along the extension direction of the through hole 42, the fifth surface 3221 is spaced apart from the first limiting portion 321 relative to the sixth surface 3222. The second surface 3212 of the first limiting portion 321 and the fifth surface 3221 of the second limiting portion 322 are respectively located on opposite sides of the limiting member 4.

[0045] In some embodiments, the stopper 32 includes a third stopper 323. Along the extension direction of the through hole 42, the third stopper 323 is positioned closer to the second stopper 322 relative to the first stopper 321, and the third stopper 323 is at least partially located between the first stopper 321 and the second stopper 322. In some embodiments, the third stopper 323 is elongated and extends along the extension direction of the through hole 42. In some embodiments, the stopper 32 includes at least two third stoppers 323. For example, as shown in FIG14 , the two stoppers 32 are located on either side of the main body 41, perpendicular to the extension direction of the through hole 42. In the present application, when the stopper 4 is mounted on the main body 31, or when the stopper 4 and the main body 31 are in the third connection state, the extension direction of the through hole 42 is aligned with the extension direction E of the cable 3, as shown in FIG12 and FIG13 .

[0046] In some embodiments, such as shown in Figures 7 and 8, the housing 1 has a first cavity 6, which is used to accommodate the cable 3; the first cavity 6 has an opening 60, the housing 1 has an outer surface 13, the opening 60 passes through the outer surface 13, and the opening 60 is used to extend the cable 3.

[0047] In some embodiments, the housing 1 includes a first cavity wall 61 and a protrusion 62. The first cavity wall 61 is located around the periphery of the first cavity 6. The protrusion 62 is connected to the first cavity wall 61, protruding from the first cavity wall 61, and located in the first cavity 6, as shown, for example, in Figures 7 and 8. When the cable 3 and the housing 1 are in the first state, the protrusion 62 can engage with at least one of the main body 31 and the limiter 32, and the limiter 32 can engage with at least one of the outer surface 13 and the protrusion 62 to limit the displacement of the cable 3 relative to the housing 1. For example, as shown in Figure 11, the displacement of the cable 3 relative to the housing 1 is limited along a direction perpendicular to the height of the gas sensing device 100.

[0048] In some embodiments, the protrusion 62 includes a first protrusion 63. When the cable 3 and the housing 1 are in the first state, the cable 3 is at least partially located in the first cavity 6 and extends through the opening 60. Along the extension direction of the cable 3, the first stopper 321 is spaced away from the opening 60 relative to the first protrusion 63, and the first protrusion 63 is at least partially located between the first stopper 321 and the opening 60, as shown in Figures 7, 8, 11, and 12. Alternatively, a plane perpendicular to the width direction W of the gas sensing device 100 is defined as a second projection plane. The first protrusion 63 has a first projection on the second projection plane, and the first stopper 321 has a second projection on the second projection plane, with the second projection at least partially overlapping the first projection. In this manner, when the cable 3 is subjected to an external tensile force directed away from the gas sensing assembly 2, the first stopper 321 abuts against the first protrusion 63, limiting the relative displacement of the cable 3 relative to the housing 1 and thereby reducing the force applied to the connection between the cable 3 and the circuit board 22. When the gas sensor assembly 2 and the housing 1 need to be separated, the cable 3 is pulled from the inside of the housing 1, for example, from the first protrusion 63 to the direction of the first limit portion 321, so that the cable 3 can be removed from the housing 1, thereby achieving the separation of the cable 3 and the housing 1.

[0049] The detachable connection between the cable 3 and the housing 1 can also facilitate the calibration and debugging of the gas sensing device 100. For example, in order to simulate the gas detection environment, the gas sensing component 2 is assembled with the housing 1 to form a complete product. During the detection, if the detection data is found to be deviated, the gas sensing component 2 needs to be disassembled from the housing 1, and the structure or parameters of the circuit board 22 or the electronic components on the circuit board 22 need to be adjusted. If the cable 3 and the housing 1 are not detachable, it may cause interference or disturbance to the process of adjusting the structure or parameters. However, the present application detachably connects the cable 3 and the housing 1, which can facilitate the adjustment of the structure or parameters of the circuit board 22 or the electronic components on the circuit board 22. Moreover, after the cable 3 and the housing 1 are assembled, the first protrusion 63 of the housing 1 cooperates with the first limiting portion 321 of the cable 3 to limit the displacement of the cable 3 relative to the circuit board 22, thereby reducing the risk of the cable 3 detaching from the circuit board 22.

[0050] In some embodiments, the housing 1 includes at least two first protrusions 63, distributed on either side of the first cavity 6 along the length L or width W of the housing 1. When the cable 3 and the housing 1 are in the first state, along the extension direction of the cable 3, the at least two first protrusions 63 are close to the opening 60 relative to the first stop 321. In this way, when the cable 3 is subjected to external tension, the at least two first protrusions 63 limit the cable 3, thereby increasing the contact area between the cable 3 and the housing 1. This allows the cable 3 to withstand greater external tension without causing relative displacement with the housing 1.

[0051] Specifically, as shown in Figures 7 and 8 , for example, the first cavity wall 61 includes a first sub-cavity wall 612 and a second sub-cavity wall 613. Along the length L or width W of the housing 1, at least a portion of the first sub-cavity wall 612 and at least a portion of the second sub-cavity wall 613 are located on either side of the first cavity 6. The first protrusion 63 includes a first sub-protrusion 632 and a second sub-protrusion 633. The first sub-protrusion 632 is connected to the first sub-cavity wall 612, and the second sub-protrusion 633 is connected to the second sub-cavity wall 613. When the cable 3 and the housing 1 are in the first state, along the extension direction of the cable 3, the first sub-protrusion 632 and the second sub-protrusion 633 are both located close to the opening 60 relative to the first limiting portion 321.

[0052] In some embodiments, the first limiting portion 321 has a first surface 3211 and a second surface 3212. When the cable 3 and the housing 1 are in the first state, the first surface 3211 is closer to the opening 60 relative to the second surface 3212 along the extension direction E of the cable 3. The first limiting portion 321 has a limiting groove 324, and the first protrusion 63 is at least partially located in the limiting groove 324. The first protrusion 63 has a free end that abuts the first limiting portion 321.

[0053] Specifically, as shown in Figures 13 and 14 , the limiting groove 324 includes a first limiting groove 3241 and a second limiting groove 3242. When the cable 3 and the housing 1 are in the first state, the first sub-protrusion 632 is at least partially located in the first limiting groove 3241, and the second sub-protrusion 633 is at least partially located in the second limiting groove 3242. In some embodiments, the first sub-protrusion 632 has a first free end 631, and the second sub-protrusion 633 has a second free end 641. The first free end 631 and the second free end 641 respectively abut against the first limiting portion 321. The first free end 631 and the second free end 641 are located on the first wall 611.

[0054] In some embodiments, the housing 1 has a second protrusion 64, which is connected to the first cavity wall 61, protrudes from the first cavity wall 61, is located in the first cavity 6, and is farther away from the opening 60 than the first protrusion 63. When the cable 3 and the housing 1 are in the first state, the first stop 321 is at least partially located between the first protrusion 63 and the second protrusion 64 along the extension direction E of the cable 3.

[0055] In some embodiments, the housing 1 includes at least two second protrusions 64. Along the extension direction of the cable 3, the at least two second protrusions 64 are each located away from the opening 60 relative to the first protrusion 63. Thus, the second protrusion 64 corresponds to the first protrusion 63. Specifically, as shown in Figures 7 and 8, the second protrusion 64 includes a third sub-protrusion 642 and a fourth sub-protrusion 643. The third sub-protrusion 642 is connected to the first sub-cavity wall 612, and the fourth sub-protrusion 643 is connected to the second sub-cavity wall 613. When the cable 3 and the housing 1 are in the first state, along the extension direction of the cable 3, the first limiting portion 321 is at least partially located between the first sub-protrusion 632 and the third sub-protrusion 642, and the first limiting portion 321 is at least partially located between the second sub-protrusion 633 and the fourth sub-protrusion 643.

[0056] In some embodiments, such as shown in Figures 7 and 8 , the first cavity wall 61 includes a first wall surface 611, at least a portion of which is exposed to the first cavity 6. The housing 1 has a stop groove 67, which is recessed from the first wall surface 611 toward the interior of the first cavity wall 61. In other words, the stop groove 67 is connected to the first cavity 6, and at least a portion of the stop groove 67 is away from the first cavity 6 relative to the first wall surface 611. The stop groove 67 extends through the first wall surface 611.

[0057] In some embodiments, the stop groove 67 includes a first stop groove 671. The first protrusion 63 and the second protrusion 64 are located around the periphery of the first stop groove 671, and the first stop groove 671 is located between the first protrusion 63 and the second protrusion 64. When the cable 3 and the housing 1 are in the first state, along the extension direction of the cable 3, the first protrusion 63 is closer to the opening 60 relative to the first stop groove 671, and the second protrusion 64 is farther away from the opening 60 relative to the first stop groove 671. The first stop groove 671 facilitates the installation and positioning of the first limiting portion 321. When the cable 3 and the housing 1 are in the first state, the first limiting portion 321 is at least partially located in the first stop groove 671, as shown in Figures 7, 8, and 11.

[0058] In some embodiments, the first cavity wall 61 includes a first stop groove wall surface 6711. Along the recessed direction of the first stop groove 671, at least a portion of the first wall surface 611 and the first stop groove wall surface 6711 are located on either side of the first stop groove 671. When the cable 3 and the housing 1 are in the first state, the first stop portion 321 abuts against the first stop groove wall surface 6711. In some embodiments, the first stop portion 321 is sealed against the first stop groove wall surface 6711.

[0059] In some embodiments, the first wall 611 includes a first sub-wall 6111 and a second sub-wall 6112, the first sub-cavity wall 612 includes the first sub-wall 6111, and the second sub-cavity wall 613 includes the second sub-wall 6112. Along the length or width direction W of the housing 1, at least a portion of the first sub-wall 6111 and at least a portion of the second sub-wall 6112 are located on either side of the first cavity 6, respectively. The first sub-wall 6111 and the second sub-wall 6112 each have a first stop groove 671. When the cable 3 and the housing 1 are in the first state, the first stop portion 321 is at least partially located in the first stop groove 671 provided in the first sub-wall 6111, and the first stop portion 321 is at least partially located in the first stop groove 671 provided in the second sub-wall 6112.

[0060] In some embodiments, at least a portion of the first sub-wall 6111 and at least a portion of the second sub-wall 6112 are parallel to the height direction H of the gas sensing device 100, where the direction perpendicular to the circuit board 22 is the height direction H of the gas sensing device 100. The first wall 611 includes a third sub-wall 6113, and both the first sub-wall 6111 and the second sub-wall 6112 are connected to the third sub-wall 6113.

[0061] In some embodiments, the cable 3 includes a second stopper 322 connected to the main body 31, protruding from the main body 31, and spaced apart from the first stopper 321. When the cable 3 and the housing 1 are in the first state, the second stopper 322 is located outside the first cavity 6, and the opening 60 is located between the second stopper 322 and the first stopper 321 along the extension direction of the cable 3. This reduces relative displacement between the cable 3 and the housing 1 when the cable 3 is subjected to a pulling force toward the interior of the housing 1.

[0062] In some embodiments, when the cable 3 and the housing 1 are in the first state, the first protrusion 63 abuts the first limiting portion 321, and the second limiting portion 322 abuts the outer surface 13 of the housing 1. The first protrusion 63 cooperates with the first limiting portion 321 to limit the displacement of the cable 3 relative to the housing 1 along the extension direction; the second limiting portion 322 cooperates with the outer surface 13 of the housing 1 to limit the displacement of the cable 3 relative to the housing 1 in the direction opposite to the extension direction. In this way, the housing 1 components can both limit the position of the cable 3 and position it. In some embodiments, when the cable 3 and the housing 1 are in the first state, the first cavity wall 61 abuts the first limiting portion 321.

[0063] In some embodiments, the cable 3 has a third stopper 323 that protrudes from the main body 31. Along the extension direction of the cable 3, the third stopper 323 is located between the first stopper 321 and the second stopper 322. The third stopper 323 abuts against the first cavity wall 61. This increases the connection area between the cable 3 and the first cavity wall 61, increasing friction between the cable 3 and the first cavity wall 61 and strengthening the positional contact between the cable 3 and the housing 1.

[0064] In some embodiments, the retaining groove 67 includes a second retaining groove 672. Along the extension direction of the cable 3, the second retaining groove 672 is closer to the opening 60 than the first retaining groove 671. The first protrusion 63 is at least partially located between the first retaining groove 671 and the second retaining groove 672. When the cable 3 and the housing 1 are in the first state, the third retaining portion 323 is at least partially located in the second retaining groove 672. This facilitates the installation and positioning of the third retaining portion 323.

[0065] In some embodiments, the first cavity wall 61 includes a second stop groove wall surface 6721. Along the recessed direction of the second stop groove 672, at least a portion of the first wall surface 611 and the second stop groove wall surface 6721 are located on either side of the second stop groove 672, and the third stopper 323 abuts the second stop groove wall surface 6721. In some embodiments, the third stopper 323 is sealed to the second stop groove wall surface 6721. In some embodiments, the first sub-wall surface 6111 and the second sub-wall surface 6112 each have their own second stop groove 672.

[0066] In some embodiments, the second stop groove 672 extends through the outer surface 13 of the housing 1, and the second stop groove wall surface 6721 is at least partially located outside the opening 60. In some embodiments, the first cavity wall 61 includes a stop surface 673 that connects the first wall surface 611 and the second stop groove 672. The stop surface 673 and the first protrusion 63 are both located outside the second stop groove 672, with the stop portion closer to the opening 60 than the first protrusion 63. When the cable 3 and the housing 1 are in the first state, the stop surface 673 is connected to the third limiting portion 323.

[0067] In some embodiments, the cable 3 is sealed to the housing 1. This can reduce the entry of foreign matter into the housing 1 through the first cavity 6. In some embodiments, at least one of the first limiting portion 321, the second limiting portion 322, and the third limiting portion 323 is sealed to the housing 1. Specifically, for example, the first limiting portion 321 is sealed to at least one of the first protrusion 63 and the first cavity wall 61; the second limiting portion 322 is sealed to the outer surface 13 of the housing 1; and the third limiting portion 323 is sealed to the first cavity wall 61. Specifically, the first limiting portion 321 is sealed to the wall of the first stop groove 671; and the third limiting portion 323 is connected to at least one of the wall of the second stop groove 672 and the stop surface 673.

[0068] In some embodiments, the first cavity 6 includes a first sub-cavity 65 and a second sub-cavity 66. The first sub-cavity 65 is located farther from the opening 60 than the second sub-cavity 66. The first protrusion 63 is located between the first sub-cavity 65 and the second sub-cavity 66 along the length direction L or the width direction W of the housing 1. When the cable 3 and the housing 1 are in the first state, along the extension direction E of the cable 3, the first stopper 321 is located between the first sub-cavity 65 and the second sub-cavity 66, and the third stopper 323 is at least partially located in the second sub-cavity 66, as shown in FIG11 . At least one of the first sub-cavity 65 and the second sub-cavity 66 is isolated from the external fluid of the gas sensing device 100.

[0069] In some embodiments, the housing 1 has a third protrusion 68 connected to the first cavity wall 61, protruding from the first cavity wall 61, and located in the first cavity 6. The third protrusion 68 forms an angle with the first cavity wall 61, facing away from the opening 60, and the angle is less than 90°, for example, 15°, 20°, 35°, 40°, 45°, 60°, 85°, etc. When the cable 3 and the housing 1 are in the first state, the third protrusion 68 abuts the cable 3. The third protrusion 68 increases the contact area between the housing 1 and the cable 3. When the cable 3 is subjected to external tension, the third protrusion 68 provides an opposing force, thereby enhancing the retaining effect of the housing 1 on the cable 3. In some embodiments, the third protrusion 68 is at least partially elastic.

[0070] In some embodiments, such as those shown in Figures 7, 8, and 11, the third protrusion 68 has a sheet-like structure. In some embodiments, at least one of the first sub-wall 6111 and the second sub-wall 6112 is provided with the third protrusion 68. The angle between the third protrusion 68 provided on the first sub-wall 6111 and the first sub-wall 6111 is less than 90°, and the angle between the third protrusion 68 provided on the second sub-wall 6112 and the second sub-wall 6112 is less than 90°. In some embodiments, the third protrusion 68 is provided on both the first sub-wall 6111 and the second sub-wall 6112.

[0071] In some embodiments, the housing 1 has at least two third protrusions 68. Specifically, as shown in Figures 7 and 8, at least two third protrusions 68 are provided on the first sub-wall 6111, and at least two third protrusions 68 are provided on the second sub-wall 6112. The third protrusions 68 provided on the first sub-wall 6111 are symmetrically arranged with the third protrusions 68 provided on the second sub-wall 6112.

[0072] In some embodiments, along the extension direction E of the cable 3 , the third protrusion 68 is farther away from the opening 60 relative to the first protrusion 63 . The third protrusion 68 is farther away from the opening 60 relative to the second protrusion 64 .

[0073] In some embodiments, the housing 1 has a second cavity 7 that communicates with the first cavity 6. The circuit board 22 is at least partially located in the second cavity 7, and a portion of the cable 3 is also located in the second cavity 7, as shown in Figures 8-11. Because the cable 3 is directly connected to the circuit board 22, a portion of the cable 3 is also located in the second cavity 7. The housing 1 has a second cavity wall 73 that is located around the periphery of the second cavity 7. The first cavity wall 61 is at least partially located around the periphery of the second cavity 7. Along the length L or width W of the gas sensing device 100, the first cavity wall 61 is at least partially located between the first cavity 6 and the second cavity 7. In other words, the first cavity wall 61 at least partially defines not only the first cavity 6 but also the second cavity 7.

[0074] Specifically, for example, as shown in Figure 11, the rectangular circuit board 22 is located in the second cavity 7, and the connection between the cable 3 and the circuit board 22 is close to the long side of the circuit board 22. When the cable 3 and the housing 1 are in the first state, the extension direction of the cable 3 is parallel to the length direction L of the circuit board 22.

[0075] In some embodiments, the housing 1 has an inner cavity 10, which includes a first cavity 6 and a second cavity 7. The housing 1 includes sidewalls 102, a top wall 101, and a bottom wall 103. The sidewalls 102, top wall 101, and bottom wall 103 are all located around the inner cavity 10. Along the height direction H of the gas sensing device 100, the top wall 101 and the bottom wall 103 are located on either side of the inner cavity 10. Both the top wall 101 and the bottom wall 103 are connected to the sidewalls 102. Along the height direction H of the gas sensing device 100, the top wall 101 is farther away from the bottom wall 103 than from the sidewalls 102. Along the height direction H of the gas sensing device 100, the circuit board 22 is closer to the top wall 101 than to the bottom wall 103, as shown in Figures 8 and 9. The housing 1 has a partition wall 107 located within the inner cavity 10 and connected to at least one of the sidewalls 102, top wall 101, and bottom wall 103. Along the length or width direction W of gas sensing device 100, at least a portion of first chamber 6 and at least a portion of second chamber 7 are respectively located on either side of partition wall 107. Partition wall 107 is located on the periphery of first chamber 6, and partition wall 107 is also located on the periphery of second chamber 7. Along the length or width direction W of gas sensing device 100, partition wall 107 is at least partially located between first chamber 6 and second chamber 7. Specifically, for example, first chamber wall 61 includes partition wall 107 and a portion of sidewall 102. Along the length or width direction W of gas sensing device 100, at least a portion of sidewall 102 and partition wall 107 are respectively located on either side of first chamber 6.

[0076] Specifically, as shown in Figures 4 and 5 , the sidewall 102 includes a first sidewall 1021, a second sidewall 1022, a third sidewall 1023, and a fourth sidewall 1024. Along the length direction L of the housing 1, the first sidewall 1021 and the second sidewall 1022 are located on either side of the inner cavity 10, respectively. Along the width direction W of the housing 1, the third sidewall 1023 and the fourth sidewall 1024 are located on either side of the inner cavity 10, respectively. The partition wall 107 is connected to the third sidewall 1023 and is located between the first sidewall 1021 and the second sidewall 1022 along the length direction L of the housing 1. Both the first sidewall 1021 and the partition wall 107 are located around the periphery of the first cavity 6. The first cavity wall 61 includes a portion of the partition wall 107 and the first sidewall 1021. The partition wall 107 and the first sidewall 1021 are each provided with a first protrusion 63, a second protrusion 64, and a third protrusion 68. The partition wall 107 and the first side wall 1021 are respectively provided with respective first stop grooves 671 and second stop grooves 672. The second side wall 1022, the third side wall 1023, the fourth side wall 1024, and the partition wall 107 are all located on the periphery of the second cavity 7. The second cavity wall 73 includes the second side wall 1022, the third side wall 1023, the fourth side wall 1024, and the partition wall 107. Specifically, the partition wall 107 is used to form the first sub-cavity wall 612 described above, and the first side wall 1021 is used to form the second sub-cavity wall 613 described above.

[0077] In some embodiments, the partition wall 107 is at least partially parallel to the direction in which the cable 3 extends within the first cavity 6. This reduces the length L or width W dimensions of the gas sensing device 100, facilitating miniaturization of the gas sensing device 100. In related art, the direction in which the cable 3 extends within the first cavity 6 is perpendicular to the partition wall 107. The longer the cable 3 accommodated within the first cavity 6, the greater the size of the gas sensing device 100 that needs to be increased. The size of the gas sensing device is affected or limited by the length of the cable accommodated within the housing. In the present application, the partition wall 107 is at least partially parallel to the direction in which the cable 3 extends within the first cavity 6. For the cable 3 accommodated within the first cavity 6, the additional size of the gas sensing device 100 that needs to be increased is the thickness or width dimension of the cable 3, such as the diameter of the cable 3. This reduces the impact of the cable 3 accommodated within the first cavity 6 on the size of the gas sensing device 100, facilitating miniaturization of the gas sensing device 100.

[0078] In some embodiments, the second chamber 7 includes a first sub-chamber 71 and a second sub-chamber 72, the first sub-chamber 71 communicating with the second sub-chamber 72. Along the height direction H of the gas sensing device 100, the first sub-chamber 71 is closer to the bottom wall 103 relative to the second sub-chamber 72. The top wall 101 includes a first top wall 1011 and a second top wall 1012. Along the height direction H of the gas sensing device 100, the first top wall 1011 is closer to the bottom wall 103 relative to the second top wall 1012. The first top wall 1011 and the second top wall 1012 are respectively located on either side of the second sub-chamber 72. The housing 1 includes a connecting wall 104, to which the first top wall 1011 and the second top wall 1012 are connected. Along the height direction HH of the gas sensing device 100, the connecting wall 104 is at least partially closer to the first top wall 1011 relative to the second top wall 1012. The second top wall 1012 and the connecting wall 104 are both located on the periphery of the second sub-chamber 72, and the first top wall 1011 and the side wall 102 are located on the periphery of the first sub-chamber 71. Alternatively, the second sub-chamber 72 can be regarded as a groove that is recessed from the first top wall 1011 in a direction away from the bottom wall 103. The circuit board 22 is located in the first sub-chamber 71, and the gas detection probe 21 is at least partially located in the second sub-chamber 72. The plane perpendicular to the height direction H of the gas sensing device 100 is defined as the third projection plane, the orthographic projection of the first top wall 1011 on the third projection plane is the first orthographic projection, and the orthographic projection of the second top wall 1012 on the third projection plane is the second orthographic projection, and the second orthographic projection is located within the outer contour of the first orthographic projection.

[0079] In some embodiments, the gas detection probe 21 has a gas chamber 213 and an opening 212. The opening 212 connects the gas chamber 213 to the outside of the gas detection probe 21. The gas detection probe 21 includes a detection element 210 located in the gas chamber 213. The detection element 210 comprises a thermistor, such as an NTC. The gas to be detected enters the gas chamber 213 through the opening 212 and comes into contact with the detection element 210. Upon contact with the gas to be detected, the detection element 210 generates an electrical signal, thereby enabling the gas detection probe 21 to detect the gas to be detected.

[0080] In some embodiments, the gas chamber 213 is in communication with the second sub-chamber 72, which is in gaseous communication with the outside of the gas sensing device 100. The second top wall 1012 includes a first perforated portion 105, which is located outside the second sub-chamber 72. The first perforated portion 105 has a first through-hole 1051, which extends through the second top wall 1012. The first through-hole 1051 is in gaseous communication with the outside of the gas sensing device 100 and the second sub-chamber 72. The first perforated portion 105 includes a first hole wall, which is located outside the first through-hole 1051.

[0081] In some embodiments, inner cavity 10 includes a third cavity 8, which communicates with first cavity 6 and second cavity 7. When cable 3 and housing 1 are in the first state, cable 3 is at least partially located in third cavity 8, as shown in Figures 7 to 9. Cable 3 is guided from second cavity 7, bends through third cavity 8, and then extends into first cavity 6, where it establishes a position-limited connection between housing 1 and cable 3.

[0082] In some embodiments, the housing 1 has a first communication port 81 and a second communication port 82. The first communication port 81 connects the first chamber 6 and the third chamber 8, while the second communication port 82 connects the second chamber 7 and the third chamber 8. Along the length L or width W of the gas sensing device 100, the first communication port 81 and the second communication port 82 are both located between the partition wall 107 and the side wall 102. Specifically, as shown in Figures 7 to 9, along the length L of the housing 1, the second chamber 7 and the third chamber 8 are located on either side of the second communication port 82; along the width W of the housing 1, the first chamber 6 and the third chamber 8 are located on either side of the first communication port 81. The first side wall 1021 and the fourth side wall 1024 are both located around the periphery of the third chamber 8. Along the length L of the housing 1, the first communication port 81 is located between the partition wall 107 and the first side wall 1021. Along the width W of the housing 1, the second communication port 82 is located between the partition wall 107 and the fourth side wall 1024. Of course, in other embodiments, along the width direction W of the shell 1, the second cavity 7 and the third cavity 8 are respectively located on both sides of the second connecting port 82; along the length direction L of the shell 1, the first cavity 6 and the third cavity 8 are respectively located on both sides of the first connecting port 81.

[0083] In some embodiments, the partition wall 107 is located on the periphery of the first cavity 6 , and the first cavity 6 includes a first communication port 81 and an opening 60 . Along the extension direction of the cable 3 in the first cavity 6 , the opening 60 and the first communication port 81 are respectively located on both sides of the first cavity 6 .

[0084] In some embodiments, the gas sensor assembly 2 further includes a support member 23 and a waterproof breathable membrane 24, as shown in FIG2 . The support member 23 includes a second perforated portion 106 having a second perforated portion 1061 extending through the support member 23. The second perforated portion 106 includes a second perforated wall located around the second perforated portion 1061. The support member 23 is located in the second sub-chamber 72 and is connected to the second top wall 1012. The second perforated portion 1061 is at least partially aligned with the first perforated portion 1051. The waterproof breathable membrane 24 is sandwiched between the support member 23 and the second top wall 1012. In a direction perpendicular to the height direction H of the gas sensor device 100, the orthographic projection of the first perforated portion 105 on the waterproof breathable membrane 24 is located within the outer contour of the waterproof breathable membrane 24, and the orthographic projection of the second perforated portion 106 on the waterproof breathable membrane 24 is located within the outer contour of the waterproof breathable membrane 24. That is, the waterproof breathable membrane 24 completely covers the first perforated portion 105 , and the waterproof breathable membrane 24 completely covers the second perforated portion 106 .

[0085] In some embodiments, the second top wall 1012 includes at least two first perforated portions 105 , and correspondingly, the support member 23 includes at least two second perforated portions 106 , and the at least two first perforated portions 105 correspond one-to-one to the at least two second perforated portions 106 .

[0086] In some embodiments, the first perforated portions 105 are arranged in one, two, or more rows, and each row of first perforated portions 105 includes at least two first perforated portions 105. The first perforated portions 105 have racetrack-shaped holes and round holes, and three racetrack-shaped holes (i.e., racetrack-shaped holes) and one round hole are arranged in a row, as shown in, for example, Figures 1 and 2, or Figures 15 and 16.

[0087] In some embodiments, the support member 23 is connected to the second top wall 1012 by at least one of laser welding, ultrasonic welding, and bonding.

[0088] In some embodiments, the support member 23 is ultrasonically welded to the second top wall 1012. Specifically, the support member 23 includes an edge portion located outside the second perforated portion 106; in a direction perpendicular to the height direction H of the gas sensing device 100, the edge portion is closer to the connecting wall 104 relative to the second perforated portion 106. The edge portion is ultrasonically welded to the second top wall 1012. Of course, in other embodiments, the support member 23 can also be connected to the second top wall 1012 using other methods, such as adhesive bonding, laser welding, friction welding, etc. In some embodiments, the support member 23 and the connecting wall 104 have a clearance fit.

[0089] In some embodiments, the support member 23 is a sheet-shaped or plate-shaped member, and the support member 23 is perpendicular to the height direction H of the gas sensing device 100 .

[0090] In some embodiments, the method for manufacturing the housing 1 includes the following steps:

[0091] S1. Provide a housing 1, wherein the housing 1 includes a second top wall 1012, and the first perforated portion 105 has a first perforated hole 1051, and the first perforated hole 1051 is provided through the second top wall 1012;

[0092] S2. Providing a substrate, wherein the substrate has a second through-hole 1061 extending through the substrate. The substrate has a first side surface and a second side surface, respectively located on opposite sides of the substrate along a thickness direction of the substrate. The substrate includes a flange portion connected to the first side surface and protruding from the first side surface.

[0093] S3. Place the first side surface of the substrate toward the second top wall 1012, keep the flange portion in contact with the second top wall 1012, and melt the flange portion.

[0094] In some embodiments, the energy source for melting the flange portion in step S3 includes, but is not limited to, laser, ultrasonic, and friction. In other words, the support member 23 can be connected to the housing 1 by laser welding, ultrasonic welding, friction welding, or the like.

[0095] In some embodiments, the housing 1 includes a first shell 11 and a second shell 12, as shown, for example, in Figures 2 to 6 or Figures 16 to 19. The first shell 11 and the second shell 12 have a first mating state and a second mating state. The connection between the first shell 11 and the second shell 12 can be switched from the first mating state to the second mating state, and vice versa. In the first mating state, the cable 3 is positionally connected to at least one of the first shell 11 and the second shell 12. In the first mating state, the first shell 11 and the second shell 12 are separated. In the second mating state, the first shell 11 and the second shell 12 are mated, fixedly connected or positionally connected, with the first shell 11 at least partially positioned outside the first cavity 6 and the second shell 12 at least partially positioned outside the first cavity 6. In other words, the first shell 11 and the second shell 12 are detachably connected, and disassembly of the first shell 11 and the second shell 12 does not damage the structures of the first shell 11 and the second shell 12. This further facilitates separation of the cable 3 from the housing 1. When the cable 3 and the housing 1 are separated, the first housing 11 and the second housing 12 may be separated first, and then the cable 3 may be separated from one of the first housing 11 and the second housing 12 .

[0096] In some embodiments, the first housing 11 has a first surface 111 and a first outer surface 112. In the second mating state, the first surface 111 faces the second housing 12 and at least partially contacts the second housing 12. When the first and second housings 11 and 12 are in the second mating state, the first outer surface 112 is exposed to the outside of the gas sensing device 100. The first housing 11 has a first groove 113, which is recessed from the first surface 111 toward the interior of the first housing 11. The first groove 113 extends through the first surface 111 and the first outer surface 112. The first groove 113 has a first notch 1135 and a second notch 1136, with the first notch 1135 located on the first outer surface 112 and the second notch 1136 located on the first surface 111. Both the first notch 1135 and the second notch 1136 extend through the first surface 111 and the first outer surface 112. The first housing 11 has a first groove wall 1131, which is located at the periphery of the first groove 113. The first groove 113 is at least partially used to form the first cavity 6. The first notch 1135 is at least partially used to form the opening 60, and the first groove wall 1131 is at least partially used to form the first cavity wall 61. The first protrusion 63 is provided on the first groove wall 1131, the first protrusion 63 is connected to the first groove wall 1131, and the first protrusion 63 is located in the first groove 113. The second shell 12 has a second surface 121, and the second surface 121 is at least partially used to form the first cavity wall 61. In the second mating state, the second surface 121 faces the first shell 11, and the second surface 121 at least partially covers the second notch 1136. The second surface 121 is at least partially located around the periphery of the first groove 113, or in other words, the second surface 121 is at least partially located around the periphery of the first cavity 6. The second shell 12 has a first protrusion 122 for mating with the first groove 113, and the first protrusion 122 protrudes from the second surface 121 toward the first shell 11. In the second mating state, the first protrusion 122 is at least partially located in the first groove 113 and at least partially contacts the first groove wall 1131; the first protrusion 122 is at least partially located outside the opening 60. Thus, after the first and second shells 11 and 12 are separated, the cable 3 can be easily removed from the first groove 113 through the first and second notches 1135 and 1136, thereby separating the cable 3 from the housing 1.

[0097] In some embodiments, the first notch 1135 is located on one side of the first housing 11 in the length or width direction W, and the second notch 1136 is located on one side of the second housing 12 in the height direction H. In the present application, the length direction L of the first housing 11 is consistent with the length direction L of the gas sensing device 100, the width direction W of the first housing 11 is consistent with the width direction W of the gas sensing device 100, and the height direction H of the first housing 11 is consistent with the height direction H of the gas sensing device 100.

[0098] In some embodiments, the first groove wall 1131 includes a first sub-groove wall 1132 and a second sub-groove wall 1133. Along the length or width direction W of the first housing 11, at least a portion of the first sub-groove wall 1132 and at least a portion of the second sub-groove wall 1133 are respectively located on either side of the first groove 113. The first protrusion 63 includes a first sub-protrusion 632 and a second sub-protrusion 633. The first sub-protrusion 632 is connected to the first sub-groove wall 1132, and the second sub-protrusion 633 is connected to the groove of the second sub-cavity 66.

[0099] In some embodiments, the first groove wall 1131 includes a first groove wall surface 1134, which is at least partially exposed in the first groove 113. The first housing 11 has a positioning groove 114, which is recessed from the first groove wall surface 1134 toward the interior of the first groove wall 1131. In other words, the positioning groove 114 is at least partially away from the first groove 113 relative to the first groove wall surface 1134. The positioning groove 114 extends through the first groove wall surface 1134 and extends through the first surface 111. The positioning groove 114 is at least partially used to form the stop groove 67.

[0100] In some embodiments, the positioning groove 114 includes a first positioning groove 1141 , the first protrusion 63 is located outside the first positioning groove 1141 , and the first positioning groove 1141 is farther away from the first notch 1135 than the first protrusion 63 . The first positioning groove 1141 is used to form a first stop groove 671 .

[0101] In some embodiments, the second protrusion 64 is disposed on the first groove wall 1131, the second protrusion 64 is connected to the first groove wall 1131, and the second protrusion 64 is located in the first groove 113. The second protrusion 64 is located outside the first positioning groove 1141 and is away from the first notch 1135 relative to the first positioning groove 1141.

[0102] In some embodiments, the positioning groove 114 includes a second positioning groove 1142. The first protrusion 63 is located around the periphery of the second positioning groove 1142. The second positioning groove 1142 is closer to the first notch 1135 than the first protrusion 63, and the second positioning groove 1142 extends through the first outer surface 112. The second positioning groove 1142 is used to form the second stop groove 672. The first groove wall 1131 includes a wall surface of the second positioning groove 1142. Along the concave direction of the second positioning groove 1142, at least a portion of the first groove wall surface 1134 and the wall surface of the second positioning groove 1142 are located on both sides of the second positioning groove 1142.

[0103] In some embodiments, the first groove wall 1131 includes a stop surface 673 that connects the first groove wall 1134 and the wall of the second positioning groove 1142. When the first housing 11 and the second housing 12 are in the second state, the stop surface 673 and the first protrusion 63 are both located outside the second stop groove 672, and the stop surface 673 is closer to the opening 60 than the first protrusion 63.

[0104] In some embodiments, in the second mating state, the first protrusion 122 is at least partially located in the second positioning groove 1142. When the cable 3 and housing 1 are in the first state, and the first shell 11 and the second shell 12 are in the second mating state, the third limiting portion 323 is at least partially clamped between the stop portion and the first protrusion 122. In this state, the first protrusion 122 forms the second positioning groove 1142, or in other words, the first protrusion 122 is located around the second positioning groove 1142; along the height direction H of the first shell 11, the first protrusion 122 and the stop surface 673 are located on either side of the second positioning groove 1142.

[0105] In some embodiments, when the cable 3 and the housing 1 are in the first state, and the first shell 11 and the second shell 12 are in the second mating state, the third limiting portion 323 is sealed connected to the stop surface 673, and the third limiting portion 323 is sealed connected to the first protrusion 122.

[0106] In some embodiments, the first protrusion 122 has a notch 1223 and a third free end 1231. When the first housing 11 and the second housing 12 are in the second mating state, the third free end 1231 is located in the first groove 113. The notch 1223 is recessed from the third free end 1231 into the interior of the first protrusion 122. In some embodiments, the notch 1223 cooperates with the first notch 1135 to form a circular opening 60. For example, as shown in FIG6 or FIG18 , the notch 1223 is semicircular and a portion of the first notch 1135 is semicircular, and the two cooperate to form the circular opening 60.

[0107] In some embodiments, the first housing 11 has a second groove 115, which has a third notch 1152. The second groove 115 extends through the first surface 111, and the third notch 1152 is at least partially located on the first surface 111. The second groove 115 communicates with the first groove 113 and at least partially forms the second cavity 7. The first housing 11 includes a second groove wall 1151, which is located around the periphery of the second groove 115 and connected to the first groove wall 1131. When the first housing 11 and the second housing 12 are in the second mating state, the second surface 121 is at least partially located around the periphery of the second groove 115. In other words, the second surface 121 is at least partially located around the periphery of the second cavity 7.

[0108] In some embodiments, the first groove wall 1131 is at least partially located outside the second groove 115 , and along the width direction W or length direction L of the first shell 11 , the first groove wall 1131 is at least partially located between the first groove 113 and the second groove 115 .

[0109] In some embodiments, the first housing 11 includes the first top wall 1011, the second top wall 1012, the sidewalls 102, and the connecting wall 104 described above, and the second housing 12 includes the bottom wall 103 described above. Along the height direction H of the gas sensing device 100, the first top wall 1011 is closer to the first surface 111 than the second top wall 1012. The first groove 113 is a groove formed by recessing from the first top wall 1011 away from the first surface 111. In some embodiments, along the height direction H of the gas sensing device 100, the first groove 113 is closer to the first surface 111 than the second top wall 1012.

[0110] In some embodiments, the first housing 11 includes the first sidewall 1021, second sidewall 1022, third sidewall 1023, and fourth sidewall 1024 described above, and also includes the partition wall 107 described above. The first groove wall 1131 includes a portion of the first sidewall 1021 and the partition wall 107, and the second groove wall 1151 includes the second sidewall 1022, third sidewall 1023, fourth sidewall 1024, and the partition wall 107. In other words, the first groove wall 1131 and the second groove wall 1151 share a common wall portion, which is the partition wall 107. In other words, the first groove wall 1131 includes the partition wall 107, and the second groove wall 1151 also includes the partition wall 107. Specifically, the partition wall 107 forms the first sub-groove wall 1132 described above, and the first sidewall 1021 forms the second sub-groove wall 1133 described above.

[0111] In some embodiments, the first housing 11 has a third groove 116 that is recessed from the first surface 111 toward the interior of the first housing 11. The third groove 116 at least partially forms the third cavity 8. When the first housing 11 and the second housing 12 are in the second mating state, the second surface 121 is at least partially located around the third groove 116. In other words, the second surface 121 is at least partially located around the third cavity 8.

[0112] In some embodiments, the first housing 11 has a fourth groove 117 extending through the first surface 111. The fourth groove 117 has a fourth notch 1161, which is at least partially located on the first surface 111. The fourth groove 117 is disposed on the sidewall 102. The first housing 11 includes a fourth groove wall 1171, which is located around the periphery of the fourth groove 117. The fourth groove wall 1171 includes a fourth groove bottom wall 1173 and fourth groove sidewalls 1172. Along the height direction H of the first housing 11, the fourth groove bottom wall 1173 and the fourth notch 1161 are located on either side of the fourth groove 117, respectively. The fourth groove sidewall 1172 is closer to the fourth notch 1161 than the fourth groove bottom wall 1173. The second housing 12 includes a second protrusion 123, which is disposed protruding from the second surface 121. The gas sensing device 100 also includes a sealing member 9, such as shown in FIG. 9 or FIG. 17. The seal 9 is at least partially accommodated in the fourth groove 117. When the first housing 11 and the second housing 12 are in the second mating state, the second protrusion 123 is at least partially located in the fourth groove 117, and the seal 9 is clamped between the first housing 11 and the second protrusion 123. Specifically, the seal 9 is clamped between the fourth groove bottom wall 1173 and the second protrusion 123. When the first housing 11 and the second housing 12 are in the second mating state, the seal 9 is sealed to the first housing 11, and the seal 9 is sealed to the second protrusion 123.

[0113] In some embodiments, fourth groove 117 includes a fifth notch 1174 and a sixth notch 1175. Fifth notch 1174 is located in first sub-groove wall 1132, and sixth notch 1175 is located in second sub-groove wall 1133. When seal 9 is received in third groove 116, seal 9 is at least partially located in first groove 113. In some embodiments, fifth notch 1174 is closer to first notch 1135 than sixth notch 1175.

[0114] In some embodiments, the second housing 12 has a fifth groove 124, which has a seventh notch 1244. The housing 1 has a sealing groove, which includes a fourth groove 117 and a fifth groove 124. When the first housing 11 and the second housing 12 are in the second mating state, the seal 9 is at least partially accommodated in the fourth groove 117, and the seal 9 is at least partially accommodated in the fifth groove 124. The second housing 12 includes a fifth groove wall 1241, which is located around the periphery of the fifth groove 124. The fifth groove wall 1241 includes a fifth groove bottom wall 1243 and fifth groove side walls 1242. Along the height direction H of the second housing 12, the fifth groove bottom wall 1243 and the seventh notch 1244 are located on either side of the fifth groove 124, respectively. The fifth groove side walls 1242 are closer to the seventh notch 1244 than the fifth groove bottom wall 1243. In some embodiments, the wall surface of the fourth groove bottom wall 1173 and the wall surface of the fifth groove bottom wall 1243 are located in the same plane.

[0115] In some embodiments, such as shown in FIG6 or FIG18 , the first protrusion 122 includes a first sub-protrusion 1221 and a second sub-protrusion 1222, and the first sub-protrusion 1221 and the second sub-protrusion 1222 are both located at the periphery of the fifth groove 124. When the sealing member 9 is received in the fifth groove 124, the sealing member 9 is at least partially clamped between the first sub-protrusion 1221 and the second sub-protrusion 1222.

[0116] In some embodiments, the sealing member 9 is an elastic member, for example, the sealing member 9 is an elastic member made of rubber.

[0117] In some embodiments, when the first shell 11 and the second shell 12 are in the second mating state, the seal 9 is sealed to both the first shell 11 and the second shell 12. This reduces the risk of foreign matter entering the inner cavity 10 of the housing 1 through the connection between the first shell 11 and the second shell 12. Specifically, the seal 9 is sealed to both the fourth groove wall 1171 and the second protrusion 123, and the seal 9 is sealed to the fifth groove wall 1241.

[0118] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A gas sensing device, comprising a housing (1) and a gas sensing component (2), wherein: The gas sensor assembly (2) comprises a gas detection probe (21), a circuit board (22) and a cable (3), wherein the gas detection probe (21) and the cable (3) are both electrically connected to the circuit board (22); The housing has an inner cavity (10), at least a portion of the gas detection probe (21) and at least a portion of the circuit board (22) are both located in the inner cavity (10), and at least a portion of the cable (3) is located in the inner cavity (10) where the circuit board (22) is located; The cable (3) and the housing (1) have a first state and a second state. In the first state, the cable (3) and the housing (1) are fixedly connected or limit-connected. In the second state, the cable (3) and the housing (1) are separated. The connection between the cable (3) and the housing (1) can be switched from the second state to the first state.

2. The gas sensing device according to claim 1, wherein: The cable (3) is at least partially flexible, and the cable (3) is directly connected to the circuit board (22).

3. The gas sensing device according to claim 1, wherein: The inner cavity (10) comprises a first cavity (6), the first cavity (6) has an opening (60), the outer shell (1) has an outer surface (13), and the opening (60) passes through the outer surface (13); The housing (1) comprises a first cavity wall (61) and a convex portion (62), wherein the first cavity wall (61) is located at the periphery of the first cavity (6), the convex portion (62) is connected to the first cavity wall (61), the convex portion (62) protrudes from the first cavity wall (61), and the convex portion (62) is located in the first cavity (6); The cable (3) comprises a main body (31) and a limiting portion (32), wherein the limiting portion (32) is fixedly connected or limitatively connected to the main body (31), and the limiting portion (32) protrudes from the main body (31); When the cable (3) and the housing (1) are in a first state, the cable (3) is partially located in the first cavity (6), and the cable (3) passes through the opening (60); the protrusion (62) cooperates with at least one of the main body (31) and the limiting portion (32), and the limiting portion (32) cooperates with at least one of the outer surface (13) and the protrusion (62), so as to limit the displacement of the cable relative to the housing.

4. The gas sensing device according to claim 3, wherein: The convex portion (62) includes a first convex portion (63), and the limiting portion (32) includes a first limiting portion (321); When the cable (3) and the housing (1) are in a first state, along the extension direction of the cable (3), the first limiting portion (321) is away from the opening (60) relative to the first protrusion (63), and the first protrusion (63) is at least partially located between the first limiting portion (321) and the opening (60).

5. The gas sensing device according to claim 4, wherein: The convex portion (62) includes a second convex portion (64), and the second convex portion (64) is farther away from the opening (60) than the first convex portion (63); The housing (1) has a first stop groove (671), and the first protrusion (63) and the second protrusion (64) are both located on the periphery of the first stop groove (671); when the cable (3) and the housing (1) are in a first state, along the extension direction of the cable (3), the first stop groove (671) is close to the opening (60) relative to the second protrusion (64), and the first limiting portion (321) is at least partially located in the first stop groove.

6. The gas sensing device according to claim 5, wherein: The convex portion (62) includes at least two first convex portions (63), and along the length or width direction of the shell, the at least two first convex portions (63) are distributed on both sides of the first cavity (6); The convex portion (62) includes at least two second convex portions (64), and along the length or width direction of the shell, the at least two second convex portions (64) are distributed on both sides of the first cavity (6).

7. The gas sensing device according to claim 4, wherein: The limiting portion (32) comprises a second limiting portion (322), and a distance is provided between the second limiting portion (322) and the first limiting portion (321); When the cable (3) and the housing (1) are in a first state, the second limiting portion (322) is located outside the first cavity (6), and along the extension direction of the cable (3), the opening (60) is located between the second limiting portion (322) and the first limiting portion (321).

8. The gas sensing device according to claim 7, wherein: The limiting portion (32) comprises a third limiting portion (323), and along the extension direction of the cable (3), the third limiting portion (323) is located between the first limiting portion (321) and the second limiting portion (322); When the cable (3) and the housing (1) are in the first state, the third limiting portion (323) abuts against the first cavity wall (61), and the first limiting portion (321) and the first At least one of the second limiting portion (322) and the third limiting portion (323) is sealed and connected to the first cavity wall (61); When the cable (3) and the housing (1) are in the first state, the first cavity (6) comprises a first sub-cavity (65) and a second sub-cavity (66); along the extension direction of the cable (3), the first limiting portion (321) is located between the first sub-cavity (65) and the second sub-cavity (66); the first sub-cavity (65) is away from the opening (60) relative to the second sub-cavity (66); the third limiting portion (323) is at least partially located in the second sub-cavity (66); and at least one of the first sub-cavity (65) and the second sub-cavity (66) is isolated from the external fluid of the gas sensing device (100).

9. The gas sensing device according to claim 3, wherein: The convex portion (62) includes a third convex portion (68), and an angle is formed between the third convex portion (68) and the first cavity wall (61), the angle is away from the opening (60), and the angle is less than 90°; When the cable (3) and the housing (1) are in the first state, the third protrusion (68) abuts against the cable (3).

10. The gas sensing device according to claim 1, wherein: The housing (1) comprises a first shell (11) and a second shell (12), the first shell (11) and the second shell (12) having a first mating state and a second mating state, the first shell (11) and the second shell (12) being able to switch from the first mating state to the second mating state, and the first shell (11) and the second shell (12) being able to switch from the second mating state to the first mating state; In the first mating state, the first shell (11) and the second shell (12) are separated; in the second mating state, the first shell (11) and the second shell (12) are fixedly connected or position-limitedly connected, the first shell (11) is at least partially located on the periphery of the first cavity (6), and the second shell (12) is at least partially located on the periphery of the first cavity (6); When the cable (3) and the housing (1) are in the first state, the cable (3) is fixedly connected or positionally connected to at least one of the first housing (11) and the second housing (12).

11. The gas sensor device according to any one of claims 1 to 10, wherein: The housing (1) has a first cavity (6) and a second cavity (7); In the first state, the cable (3) is at least partially accommodated in the first cavity (6), and at least part of the cable (3), at least part of the gas detection probe (21) and the circuit board are (22) at least partially contained in the second cavity (7); The housing (1) comprises a partition wall (107), wherein in a direction perpendicular to the height direction of the gas sensor device (100), the partition wall (107) is at least partially located between the first cavity (6) and the second cavity (7); and the partition wall (107) is at least partially parallel to the extension direction of the cable (3) in the first cavity (6).

12. The gas sensing device according to claim 11, wherein: The housing (1) has an inner cavity (10), and the inner cavity (10) includes the first cavity (6) and the second cavity (7); The housing (1) comprises a side wall (102), a top wall (101) and a bottom wall (103); the side wall (102), the top wall (101) and the bottom wall (103) are all located at the periphery of the inner cavity; along the height direction of the gas sensor device (100), the top wall (101) is farther away from the bottom wall (103) relative to the side wall (102); The partition wall (107) is located in the inner cavity (10), and the partition wall (107) is connected to at least one of the side wall (102), the top wall (101) and the bottom wall (103).

13. The gas sensing device according to claim 12, wherein: The side wall (102) comprises a first side wall (1021), a second side wall (1022), a third side wall (1023) and a fourth side wall (1024); along the length direction of the shell (1), the first side wall (1021) and the second side wall (1022) are respectively located on two sides of the inner cavity (10); along the width direction of the shell (1), the third side wall (1023) and the fourth side wall (1024) are respectively located on two sides of the inner cavity; The partition wall (107) is connected to the third side wall (1023); along the length direction of the shell (1), the partition wall (107) is located between the first side wall (1021) and the second side wall (1022); the first side wall (1021) and the partition wall (107) are both located at the periphery of the first cavity (6); the second side wall (1022), the third side wall (1023), the fourth side wall (1024) and the partition wall (107) are all located at the periphery of the second cavity (7).

14. The gas sensing device according to claim 12, wherein: The inner cavity (10) comprises a third cavity (8), a first communication port (81) and a second communication port (82), wherein the first communication port (81) communicates with the first cavity (6) and the third cavity (8), and the second communication port (82) communicates with the second cavity (7) and the third cavity (8); The cable (3) is at least partially accommodated in the third chamber (8), and the cable (3) passes through the first communication port (81) and the second communication port (82); along the length direction or the width direction of the gas sensor device (100), the first communication port (81) and the second communication port (82) Both are located between the partition wall (107) and the side wall (102).

15. The gas sensing device of claim 14, wherein: The first cavity (6) has an opening (60), the housing (1) has an outer surface (13), the opening (60) passes through the outer surface (13), and the cable (3) passes through the opening (60); The partition wall (107) is located at the periphery of the first cavity (6); the first cavity (6) comprises the first communication port (81) and the opening (60); along the extension direction of the cable (3), the opening (60) and the first communication port (81) are respectively located on two sides of the first cavity (6).

16. The gas sensing device according to claim 12, wherein: The second chamber (7) comprises a first sub-chamber (71) and a second sub-chamber (72); the first sub-chamber (71) is in communication with the second sub-chamber (72); along the height direction of the gas sensor device (100), the first sub-chamber (71) is closer to the bottom wall (103) than the second sub-chamber (72); the circuit board (22) is located in the first sub-chamber (71), and the gas detection probe (21) is at least partially located in the second sub-chamber (72); The top wall (101) comprises a first top wall (1011) and a second top wall (1012); along the height direction of the gas sensor device (100), the first top wall (1011) is closer to the bottom wall (103) than the second top wall (1012); the first top wall (1011) and the second top wall (1012) are respectively located on two sides of the second sub-chamber (72); the second top wall (1012) is located at the periphery of the second sub-chamber (72), and the first top wall (1011) is located at the periphery of the first sub-chamber (71); A surface perpendicular to the height direction of the gas sensor device is defined as a projection surface, an orthographic projection of the first top wall (1011) on the projection surface is a first orthographic projection, an orthographic projection of the second top wall (1012) on the projection surface is a second orthographic projection, and the second orthographic projection is located within an outer contour of the first orthographic projection.

17. The gas sensing device of claim 16, wherein: The gas detection probe (21) has an air chamber (213) and an opening (212), wherein the opening (212) is in communication with the air chamber (213) and the outside of the gas detection probe (21); the gas detection probe (21) comprises a detection element (210), wherein the detection element (210) is located in the air chamber (213); The second top wall (1012) comprises a first perforated portion (105), wherein the first perforated portion (105) has a first perforated hole (1051), wherein the first perforated hole (1051) passes through the second top wall (1012), and wherein the first perforated hole (1051) is in communication with the outside of the gas sensor device (100). (1051) is in gaseous communication with the second sub-chamber (72); The gas sensor assembly (2) further comprises a support member (23) and a waterproof breathable membrane (24); the support member (23) comprises a second perforated portion (106); the second perforated portion (106) has a second perforated hole (1061); the second perforated hole (1061) passes through the support member (23); the support member (23) is located in the second sub-chamber (72); the support member (23) is connected to the second top wall (1012); the second perforated hole (1061) is at least partially aligned with the first perforated hole (1051); and the waterproof breathable membrane (24) is clamped between the support member (23) and the second top wall (1012).

18. The gas sensing device of claim 17, wherein: The support member (23) is connected to the second top wall (1012) by at least one of laser welding, ultrasonic welding and bonding.

19. The gas sensing device of claim 11, wherein: The housing (1) comprises a first cavity wall (61) and a second cavity wall (73); the first cavity wall (61) is located at the periphery of the first cavity (6), the second cavity wall (73) is located at the periphery of the second cavity (7), the first cavity wall (61) comprises the partition wall (107), and the second cavity wall (73) comprises the partition wall (107); The housing (1) comprises a convex portion (62), the convex portion (62) is connected to the first cavity wall (61), the convex portion (62) protrudes from the first cavity wall (61), and the convex portion (62) is located in the first cavity (6); The cable (3) comprises a main body (31) and a limiting portion (32), wherein the limiting portion (32) is fixedly connected or limitatively connected to the main body (31), and the limiting portion (32) protrudes from the main body (31); The convex portion (62) is connected to the limiting portion (32) in a limiting manner.

20. The gas sensing device of claim 19, wherein: The convex part (62) includes a first convex part (63) and a second convex part (64); The first cavity wall (61) comprises a first wall surface (611), at least a portion of which is exposed to the first cavity (6); the housing (1) comprises a stop groove (67), the stop groove (67) is formed by being recessed from the first wall surface (611) toward the inside of the first cavity wall (61), and the first convex portion (63) and the second convex portion (64) are both located at the periphery of the stop groove (67); The limiting portion (32) is at least partially located in the stop groove (67), and the first protrusion (63) At least one of the second protrusion (64) abuts against the limiting portion (32).

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