Gas sensing device

Abstract

The gas sensing device comprises a shell 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 are electrically connected with the circuit board, the gas detection probe is at least partially accommodated in the shell, the circuit board is at least partially accommodated in the shell, and the cable is at least partially accommodated in the shell; the cable and the shell have a first connection state and a second connection state, in the first connection state, the cable and the shell are fixedly connected or in limited connection, and in the second connection state, the cable is separated from the shell; the connection between the cable and the housing is switchable from the second connection state to the first connection state. According to the gas sensing device, under the condition that the stress of the joint of the cable and the circuit board is reduced, the cable and the shell can be detached, and the gas sensing device is convenient to assemble.

Description

Technical Field

[0001] The present application relates to the field of gas detection, and in particular to a gas sensing device. Background Art

[0002] The gas sensing device includes a housing and a gas sensing component. The gas sensing component 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 for outputting signals. The gas sensing component is at least partially contained in the housing. The cable is easily loosened or even detached from the circuit board when pulled by external force, which affects signal transmission. Related technologies fix the cable and the housing in an undetachable connection, such as using the cable as an insert in the 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. Summary of the invention

[0003] The present application aims to provide a gas sensing device that is easy to assemble.

[0004] The gas sensing device provided in the present application comprises a housing and a gas sensing assembly, wherein the gas sensing assembly comprises 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;

[0005] 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;

[0006] The cable and the housing have a first connection state and a second connection state. In the first connection state, the cable and the housing are fixedly connected or limit-connected. In the second connection state, the cable and the housing are separated. The connection between the cable and the housing can be switched from the second connection state to the first connection state.

[0007] In the present application, the cable and the housing have a first connection state and a second connection state. In the first connection state, the cable and the housing are fixedly connected or limitedly connected. In the second connection state, the cable and the housing are separated. In this way, the cable and the housing can be detached while reducing the force at the connection between the cable and the circuit board, which facilitates the assembly of the gas sensor device. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 is a three-dimensional diagram of a gas sensor device provided in one embodiment of the present application;

[0009] Figure 2 is an exploded diagram of a gas sensor device provided in one embodiment of the present application;

[0010] Figure 3is a three-dimensional diagram of a first shell provided in one embodiment of the present application;

[0011] Figure 4 is a three-dimensional diagram of a first shell provided in one embodiment of the present application;

[0012] Figure 5 is a three-dimensional diagram of a first shell provided in one embodiment of the present application;

[0013] Figure 6 is a three-dimensional diagram of a second housing provided in one embodiment of the present application;

[0014] Figure 7 is a cross-sectional schematic diagram of a first shell and a second shell in a second mating state provided by an embodiment of the present application;

[0015] Figure 8 is a cross-sectional schematic diagram of a first shell and a second shell in a second mating state provided by an embodiment of the present application;

[0016] Fig. 9 is a cross-sectional view of a gas sensor device provided in one embodiment of the present application;

[0017] Fig.10 is a three-dimensional diagram of a gas sensor assembly provided in one embodiment of the present application;

[0018] Fig.11 is a schematic diagram of a cable and a housing in a first connection state provided by an embodiment of the present application;

[0019] Fig.12 is a cross-sectional schematic diagram of a cable and a housing in a first connection state provided by an embodiment of the present application;

[0020] Fig.13 is a schematic diagram of a cable provided in one embodiment of the present application;

[0021] Fig.14 is a schematic diagram of a limiter provided in one embodiment of the present application;

[0022] Fig.15 is a three-dimensional diagram of a gas sensor device provided in another embodiment of the present application;

[0023] Fig.16 is an exploded view of a gas sensor device provided in another embodiment of the present application;

[0024] Fig.17 is a three-dimensional diagram of a first shell provided in another embodiment of the present application;

[0025] Fig.18 is a three-dimensional diagram of a second housing provided in another embodiment of the present application;

[0026] Fig.19 is a cross-sectional schematic diagram of a first shell and a second shell in a second mating state provided by another embodiment of the present application;

[0027] Fig. 20 is a cross-sectional schematic diagram of a cable and a housing in a first connection state provided by another embodiment of the present application;

[0028] Fig.21 It is a schematic diagram of a cable provided in another embodiment of the present application. DETAILED DESCRIPTION

[0029] 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.

[0030] It should be clear that the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0031] The gas sensing device 100 comprises a housing 1 and a gas sensing component 2, for example Figure 1 and Figure 2 as shown, or Fig.15 and Fig.16 As shown. The gas sensor 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 sensor assembly 2 is at least partially accommodated in the housing 1. The cable 3 is easy to loosen or even detach from the circuit board 22 when pulled by external force, which affects signal transmission. The related art fixedly connects the cable 3 to the housing 1, for example, the cable 3 is used as an insert injection molding for the housing 1 for accommodating the gas sensor assembly 2, thereby reducing the force at the connection between the cable 3 and the circuit board 22, but this is not convenient for the assembly of the gas sensor device 100. Therefore, it is necessary to improve the structure of the gas sensor device 100 to facilitate its assembly.

[0032] The present application provides a gas sensor device 100 that is easy to assemble, including a housing 1 and a gas sensor assembly 2, wherein the gas sensor assembly 2 is at least partially accommodated in the housing 1. The gas sensor assembly 2 includes a gas detection probe 21, a circuit board 22, and a cable 3, for example Fig.10As shown, 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, and 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 the cable 3 is at least partially located in the inner cavity 10 where the circuit board 22 is located. The cable 3 and the housing 1 have a first connection state and a second connection state. In the first connection state, the cable 3 and the housing 1 are fixedly connected or limitedly connected, for example Fig.11 , Fig.12 , Fig. 20 As shown; in the second connection 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 connection state to the second connection state, and the connection between the cable 3 and the housing 1 can be switched from the second connection state to the first connection state. The present application can realize the detachability of the cable 3 and the housing 1 while reducing the force on the connection between the cable 3 and the circuit board 22, and such detachment will not damage the structure of the housing 1, which is convenient for the assembly of the gas sensor device 100.

[0033] In the present application, the gas detection probe 21 is used to generate an electrical signal according to the change of the parameter (such as concentration) of the gas to be detected, and other processing elements can also be set 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.

[0034] In some embodiments, the cable 3 is at least partially flexible, and the cable 3 is directly connected to the circuit board 22, for example Fig.10 For example, the cable 3 includes an enameled wire. In some embodiments, the cable 3 includes a wire bundle formed by at least two enameled wires.

[0035] In some embodiments, the cable 3 includes a main body 31 and a limiting portion 32, the limiting portion 32 is fixedly connected or limitedly connected to the main body 31, the limiting portion 32 protrudes from the main body 31, and the limiting portion 32 is used to be limitedly connected to the housing 1, for example Figure 2 shown.

[0036] In some embodiments, the cable 3 includes a main body 31 and a stopper 4, the stopper 4 includes a stopper 32, and 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 limit-connected, for example Fig.12 In the fourth connection state, the main body 31 is separated from the stopper 4, for example Fig.13 or Fig.21As shown. The connection between the main body 31 and the stopper 4 can be switched from the fourth connection state to the third connection state. That is, the main body 31 and the stopper 4 are detachably connected, and such detachment will not damage the structure of the main body 31 and the stopper 32. In some embodiments, the main body 31 includes a wire, or a wire harness formed by two or more wires. For example Figure 2 As shown, the main body 31 includes two or three enameled wires and a sleeve which is sleeved outside the two or three enameled wires to relatively fix the two or three enameled wires to form a wire bundle.

[0037] In some embodiments, the stopper 4 further includes a body 41. The body 41 has a through hole 42, which is disposed through the body 41. The body 41 includes an inner side surface and an outer side surface, wherein the inner side surface is located outside the through hole 42, and the outer side surface is away from the through hole 42 relative to the inner side surface. The stopper 32 is connected to the outer side surface, and the stopper 32 protrudes from the outer side surface, for example Fig.14 As shown. 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 41 contacts the main body 31, and the inner side surface is frictionally matched with the main body 31, so as to achieve relative fixation or limitation of the limiting member 4 and the main body 31.

[0038] In some embodiments, the stopper 4 is movably connected to the main body 31. Through the movable connection between the two, the position of the connection point of the main body 31 for connecting with the stopper 4 can be changed. It can be understood that by changing the relative position of the stopper 4 and the main body 31, the length of the cable 3 in the housing 1 can be adjusted, thereby adjusting the tightness of the connection between the cable 3 and the circuit board 22.

[0039] In some embodiments, the through hole 42 has a first through hole 421 and a second through hole 422. Along the extension direction of the through hole 42, the first through hole 421 and the second through hole 422 are respectively located on both sides of the stopper 4. For example Fig.13 and Fig.14 shown.

[0040] In some embodiments, the limiting portion 32 includes a first limiting portion 321, the first limiting portion 321 has a first surface 3211 and a second surface 3212, and along the extension direction of the through hole 42, the first surface 3211 is closer to the first through opening 421 relative to the second surface 3212. The first limiting portion 321 has a limiting groove 324, and the limiting groove 324 is formed from the first surface 3211 to the inside of the first limiting portion 321. The first limiting portion 321 has a third surface 3213 and a fourth surface 3214, and in a direction perpendicular to the extension direction of the through hole 42, the third surface 3213 and the fourth surface 3214 are respectively located on both sides of the first limiting portion 321. The limiting groove 324 runs through the third surface 3213 or the fourth surface 3214. The housing 1 is at least partially located in the limiting groove 324, so that the housing 1 can limit the limiting member 4, and then limit 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.

[0041] In some embodiments, the first position-limiting portion 321 protrudes from one side of the body portion 41 in a direction perpendicular to the extension direction of the through hole 42. In some embodiments, the first position-limiting portion 321 has a structure similar to a cube or a cuboid. The surface perpendicular to the extension direction of the through hole 42 is taken as the first projection surface, and along the extension direction of the through hole 42, the projection of the first position-limiting portion 321 on the first projection surface is a rectangle or a square.

[0042] In some embodiments, the limiting portion 32 includes a second limiting portion 322, and there is a distance between the second limiting portion 322 and the first limiting portion 321; along the extension direction of the through hole 42, the second limiting portion 322 is closer to the first through opening 421 relative to the first limiting portion 321. In some embodiments, in a direction perpendicular to the extension direction of the through hole 42, the second limiting portion 322 protrudes from the peripheral side of the body portion 41. For example Fig.14 or Fig.21 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 away from the first limiting portion 321 relative to the sixth surface 3222, and 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 both sides of the limiting member 4.

[0043] In some embodiments, the limiting portion 32 includes a third limiting portion 323. Along the extension direction of the through hole 42, the third limiting portion 323 is closer to the second limiting portion 322 relative to the first limiting portion 321, and the third limiting portion 323 is at least partially located between the first limiting portion 321 and the second limiting portion 322. In some embodiments, the third limiting portion 323 is in the shape of an elongated strip, and the third limiting portion 323 extends along the extension direction of the through hole 42. In some embodiments, the limiting portion 32 includes at least two third limiting portions 323. For example Fig.14 As shown, in a direction perpendicular to the extension direction of the through hole 42, the two limiting portions 32 are respectively located on both sides of the main body 41. In the present application, when the limiting member 4 is sleeved on the main body 31, or when the limiting member 4 and the main body 31 are in the third connection state, the extension direction of the through hole 42 is the same as the extension direction E of the cable 3. Fig.12 and Fig.13 shown.

[0044] In some embodiments, for example Figure 7 and Figure 8 As shown, the housing 1 has a first cavity 6 for accommodating the cable 3 ; the first cavity 6 has an opening 60 ; the housing 1 has an outer surface 13 ; the opening 60 penetrates the outer surface 13 ; the opening 60 is for extending the cable 3 .

[0045] In some embodiments, the housing 1 includes 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, for example Figure 7 and Figure 8 When the cable 3 and the housing 1 are in the first connection state, the protrusion 62 can cooperate with at least one of the main body 31 and the limiting portion 32, and the limiting portion 32 can cooperate 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. Fig.11 As shown, the displacement of the cable 3 relative to the housing 1 is limited along a height direction perpendicular to the gas sensor device 100 .

[0046] In some embodiments, the convex portion 62 includes a first convex portion 63. When the cable 3 and the housing 1 are in the first connection state, the cable 3 is at least partially located in the first cavity 6, and the cable 3 passes through the opening 60; along the extension direction of the cable 3, the first limit portion 321 is away from the opening 60 relative to the first convex portion 63, and the first convex portion 63 is at least partially located between the first limit portion 321 and the opening 60, and the cable 3 passes through the opening 60. Figure 7 , Figure 8 , Fig.11 and Fig.12As shown. In other words, a surface perpendicular to the width direction W of the gas sensor device 100 is defined as a second projection surface, the first protrusion has a first projection on the second projection surface, the first limit portion 321 has a second projection on the second projection surface, and the second projection at least partially overlaps with the first projection. In this way, when the cable 3 is subjected to an external pulling force in a direction away from the gas detection device, the first limit portion 321 abuts against the first protrusion, limiting the relative displacement of the cable 3 relative to the housing 1, thereby reducing the force at the connection between the cable 3 and the circuit board 22. When it is necessary to disassemble the gas sensor assembly 2 and the housing 1, the cable 3 is pulled from the inside of the housing 1, for example, the cable 3 is pulled in the direction from the first protrusion 63 to the first limit portion 321, so that the cable 3 can be removed from the housing 1, thereby realizing the separation of the cable 3 from the housing 1.

[0047] The detachable connection between the cable 3 and the housing 1 can also facilitate the calibration and debugging of the gas sensor device 100. For example, in order to simulate the gas detection environment, the gas sensor component 2 is assembled with the housing 1 to form a complete product. When the detection data is found to be biased during the detection, the gas sensor component 2 needs to be separated from the housing 1, and the circuit board 22 or the electronic components on the circuit board 22 need to be adjusted in structure or parameters. 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 limit 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.

[0048] In some embodiments, the housing 1 includes at least two first protrusions 63, and along the length direction L or the width direction W of the housing 1, the at least two first protrusions 63 are distributed on both sides of the first cavity 6. When the cable 3 and the housing 1 are in the first connection 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 limiting portion 321. In this way, when the cable 3 is subjected to external tension, the cable 3 is limited by at least two first protrusions 63, which can increase the area of ​​the cable 3 abutting against the housing 1, and the cable 3 can withstand a greater external tension without relative displacement with the housing 1.

[0049] Specifically, for example Figure 7 and Figure 8As shown, the first cavity wall 61 includes a first sub-cavity wall 612 and a second sub-cavity wall 613. Along the length direction L or the width direction 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 respectively located on both sides 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 connection state, along the extension direction of the cable 3, the first sub-protrusion 632 and the second sub-protrusion 633 are both close to the opening 60 relative to the first limiting portion 321.

[0050] 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 connection state, along the extension direction E of the cable 3, the first surface 3211 is closer to the opening 60 relative to the second surface 3212. The first limiting portion 321 has a limiting groove 324, and the first convex portion 63 is at least partially located in the limiting groove 324; the first convex portion 63 has a free end, and the free end abuts against the first limiting portion 321.

[0051] Specifically, for example Fig.13 and Fig.14 As shown, 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 connection 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, and the first free end 631 and the second free end 641 are respectively abutted against the first limiting portion 321. The first free end 631 and the second free end 641 are located on the first wall surface 611.

[0052] In some embodiments, the housing 1 has a second protrusion 64, the second protrusion 64 is connected to the first cavity wall 61, the second protrusion 64 protrudes from the first cavity wall 61, the second protrusion 64 is located in the first cavity 6, and the second protrusion 64 is away from the opening 60 relative to the first protrusion 63. When the cable 3 and the housing 1 are in the first connection state, along the extension direction E of the cable 3, the first limiting portion 321 is at least partially located between the first protrusion 63 and the second protrusion 64.

[0053] In some embodiments, the housing 1 includes at least two second protrusions 64, and along the extension direction of the cable 3, the at least two second protrusions 64 are both away from the opening 60 relative to the first protrusion 63. In this way, the second protrusion 64 corresponds to the first protrusion 63. Specifically, for example Figure 7 and Figure 8As shown, 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 connection 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.

[0054] In some embodiments, for example Figure 7 and Figure 8 As shown, the first cavity wall 61 includes a first wall surface 611, and at least a portion of the first wall surface 611 is exposed to the first cavity 6. The housing 1 has a stop groove 67, and the stop groove 67 is formed by being recessed from the first wall surface 611 to the inside of the first cavity wall 61, or in other words, the stop groove 67 is connected to the first cavity 6, and the stop groove 67 is at least partially away from the first cavity 6 relative to the first wall surface 611, and the stop groove 67 runs through the first wall surface 611.

[0055] In some embodiments, the stop groove 67 includes a first stop groove 671, the first protrusion 63 and the second protrusion 64 are located on 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 connection state, along the extension direction of the cable 3, the first protrusion 63 is close to the opening 60 relative to the first stop groove 671, and the second protrusion 64 is away from the opening 60 relative to the first stop groove 671. The first stop groove 671 facilitates the installation and limiting of the first limiting portion 321. When the cable 3 and the housing 1 are in the first connection state, the first limiting portion 321 is at least partially located in the first stop groove 671, for example Figure 7 , Figure 8 and Fig.11 shown.

[0056] In some embodiments, the first cavity wall 61 includes a first stop groove wall surface 6711, and along the direction in which the first stop groove 671 is recessed, at least a portion of the first wall surface 611 and the first stop groove wall surface 6711 are respectively located on both sides of the first stop groove 671. When the cable 3 and the housing 1 are in the first connection state, the first limiting portion 321 abuts against the first stop groove wall surface 6711. In some embodiments, the first limiting portion 321 is sealed and connected to the first stop groove wall surface 6711.

[0057] In some embodiments, the first wall surface 611 includes a first sub-wall surface 6111 and a second sub-wall surface 6112, the first sub-cavity wall 612 includes the first sub-wall surface 6111, and the second sub-cavity wall 613 includes the second sub-wall surface 6112. Along the length or width direction W of the housing 1, at least a portion of the first sub-wall surface 6111 and at least a portion of the second sub-wall surface 6112 are respectively located on both sides of the first cavity 6, and the first sub-wall surface 6111 and the second sub-wall surface 6112 respectively have respective first stop grooves 671. When the cable 3 and the housing 1 are in the first connection state, the first stop portion 321 is at least partially located in the first stop groove 671 provided on the first sub-wall surface 6111, and the first stop portion 321 is at least partially located in the first stop groove 671 provided on the second sub-wall surface 6112.

[0058] 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 detection device, and the direction perpendicular to the circuit board 22 is the height direction H of the gas detection device. The first wall 611 includes a third sub-wall 6113, and the first sub-wall 6111 and the second sub-wall 6112 are both connected to the third sub-wall 6113.

[0059] In some embodiments, the cable 3 includes a second limiting portion 322, the second limiting portion 322 is connected to the main body 31, the second limiting portion 322 protrudes from the main body 31, and there is a gap between the second limiting portion 322 and the first limiting portion 321. When the cable 3 and the housing 1 are in the first connection 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. In this way, when the cable 3 is subjected to a pulling force toward the inside of the housing 1, the relative displacement between the cable 3 and the housing 1 can be reduced.

[0060] In some embodiments, when the cable 3 and the housing 1 are in the first connection state, the first protrusion 63 abuts against the first limiting portion 321, and the second limiting portion 322 abuts against 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 opposite direction of the extension direction. In this way, the housing 1 component can limit the cable 3 and also position it. In some embodiments, when the cable 3 and the housing 1 are in the first connection state, the first cavity wall 61 abuts against the first limiting portion 321.

[0061] In some embodiments, the cable 3 has a third limiting portion 323, and the third limiting portion 323 protrudes from the main body 31. 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. The third limiting portion 323 abuts against the first cavity wall 61. In this way, the third limiting portion 323 can increase the connection area between the cable 3 and the first cavity wall 61, increase the friction between the cable 3 and the first cavity wall 61, and strengthen the limit between the cable 3 and the housing 1.

[0062] In some embodiments, the stop groove 67 includes a second stop groove 672. Along the extension direction of the cable 3, the second stop groove 672 is closer to the opening 60 relative to the first stop groove 671, and the first protrusion 63 is at least partially located between the first stop groove 671 and the second stop groove 672. When the cable 3 and the housing 1 are in the first connection state, the third limiting portion 323 is at least partially located in the second stop groove 672. In this way, the installation and limiting of the third limiting portion 323 are facilitated.

[0063] In some embodiments, the first cavity wall 61 includes a second stop groove wall surface 6721, and along the direction in which the second stop groove 672 is recessed, at least a portion of the first wall surface 611 and the second stop groove wall surface 6721 are respectively located on both sides of the second stop groove 672, and the third limiting portion 323 abuts against the second stop groove wall surface 6721. In some embodiments, the third limiting portion 323 is sealed and connected 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.

[0064] In some embodiments, the second stop groove 672 penetrates the outer surface 13 of the housing 1, and the second stop groove wall surface 6721 is at least partially located at the periphery of the opening 60. In some embodiments, the first cavity wall 61 includes a stop surface 673, the stop surface 673 connects the first wall surface 611 and the second stop groove 672 surface, the stop surface 673 and the first protrusion 63 are both located at the periphery of the second stop groove 672, and the stop portion is closer to the opening 60 relative to the first protrusion 63. When the cable 3 and the housing 1 are in the first connection state, the stop surface 673 is connected to the third limiting portion 323.

[0065] In some embodiments, the cable 3 is sealed and connected to the housing 1. In this way, it is possible to reduce foreign impurities from entering 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 and connected to the housing 1. Specifically, for example, the first limiting portion 321 is sealed and connected to at least one of the first convex portion 63 and the first cavity wall 61; the second limiting portion 322 is sealed and connected to the outer surface 13 of the housing 1; and the third limiting portion 323 is sealed and connected to the first cavity wall 61. Specifically, the first limiting portion 321 is sealed and connected 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.

[0066] 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 away from the opening 60 relative to 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 connection state, along the extension direction E of the cable 3, the first limiting portion 321 is located between the first sub-cavity 65 and the second sub-cavity 66, and the third limiting portion 323 is at least partially located in the second sub-cavity 66, for example Fig.11 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 .

[0067] In some embodiments, the housing 1 has a third protrusion 68, the third protrusion 68 is connected to the first cavity wall 61, the third protrusion 68 protrudes from the first cavity wall 61, and the third protrusion 68 is located in the first cavity 6. There is an angle between the third protrusion 68 and the first cavity wall 61, the angle is 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 connection state, the third protrusion 68 abuts against the cable 3. The third protrusion increases the contact area between the housing 1 and the cable 3. When the cable 3 is subjected to an external pulling force, the third protrusion 68 provides an opposite force to enhance the limiting effect of the housing 1 on the cable 3. In some embodiments, the third protrusion 68 is at least partially elastic.

[0068] In some embodiments, for example Figure 7 , Figure 8 and Fig.11As shown, the third convex portion 68 has a sheet-like structure. In some embodiments, at least one of the first sub-wall surface 6111 and the second sub-wall surface 6112 is provided with the third convex portion 68, and the angle between the third convex portion 68 provided on the first sub-wall surface 6111 and the first sub-wall surface 6111 is less than 90°, and the angle between the third convex portion 68 provided on the second sub-wall surface 6112 and the second sub-wall surface 6112 is less than 90°. In some embodiments, the first sub-wall surface 6111 and the second sub-wall surface 6112 are respectively provided with the third convex portion 68.

[0069] In some embodiments, the housing 1 has at least two third protrusions. Specifically, for example Figure 7 and Figure 8 As shown, at least two third protrusions 68 are arranged on the first sub-wall surface 6111, and at least two third protrusions 68 are arranged on the second sub-wall surface 6112. The third protrusions 68 arranged on the first sub-wall surface 6111 and the third protrusions 68 arranged on the second sub-wall surface 6112 are arranged symmetrically.

[0070] In some embodiments, along the extension direction E of the cable 3 , the third protrusion 68 is farther from the opening 60 relative to the first protrusion 63 . The third protrusion 68 is farther from the opening 60 relative to the second protrusion 64 .

[0071] In some embodiments, the housing 1 has a second cavity 7, which is connected to 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 located in the second cavity 7, for example Figures 8 to 11 As shown. Because the cable 3 is directly connected to the circuit board 22, a part of the cable 3 is also located in the second cavity 7. The housing 1 has a second cavity wall 73, and the second cavity wall 73 is located at the periphery of the second cavity 7. The first cavity wall 61 is at least partially located at the periphery of the second cavity 7, and along the length direction L or the width direction W of the gas sensor, the first cavity wall 61 is at least partially located between the first cavity 6 and the second cavity 7. That is, at least a part of the first cavity wall 61 is used not only to form the first cavity 6 but also to form the second cavity 7.

[0072] Specifically, for example Fig.11 As shown, 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 connection state, the extension direction of the cable 3 is parallel to the length direction L of the circuit board 22 .

[0073] In some embodiments, the housing 1 has an inner cavity 10, and the inner cavity 10 includes a first cavity 6 and a second cavity 7. The housing 1 includes a side wall 102, a top wall 101, and a bottom wall 103, and the side wall 102, the top wall 101, and the bottom wall 103 are all located at the periphery of 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 respectively located on both sides of the inner cavity 10. The top wall 101 and the bottom wall 103 are both connected to the side wall 102, and along the height direction H of the gas sensing device 100, the top wall 101 is away from the bottom wall 103 relative to the side wall 102. Along the height direction H of the gas sensing device 100, the circuit board 22 is close to the top wall 101 relative to the bottom wall 103, for example Figure 8 and Fig. 9 As shown. The housing 1 has a partition wall 107, 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. Along the length or width direction W of the gas sensing device 100, at least part of the first cavity 6 and at least part of the second cavity 7 are respectively located on both sides of the partition wall 107. The partition wall 107 is located at the periphery of the first cavity 6, and the partition wall 107 is located at the periphery of the second cavity 7. Along the length or width direction W of the gas sensing device 100, the partition wall 107 is at least partially located between the first cavity 6 and the second cavity 7. Specifically, for example, the first cavity wall 61 includes the partition wall 107 and a portion of the side wall 102, and along the length or width direction W of the gas sensing device 100, at least part of the side wall 102 and the partition wall 107 are respectively located on both sides of the first cavity 6.

[0074] Specifically, for example Figure 4 and Figure 5As shown, the side wall 102 includes 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 L of the shell 1, the first side wall 1021 and the second side wall 1022 are respectively located on both sides of the inner cavity 10; along the width direction W of the shell 1, the third side wall 1023 and the fourth side wall 1024 are respectively located on both sides of the inner cavity 10. The partition wall 107 is connected to the third side wall 1023, and along the length direction L 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, and the first cavity wall 61 includes the partition wall 107 and a part of the first side wall 1021. The partition wall 107 and the first side wall 1021 are respectively provided with respective first convex portions 63, second convex portions 64 and third convex portions 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 at the periphery of the second cavity 7, and 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.

[0075] In some embodiments, the partition wall 107 is at least partially parallel to the extension direction of the cable 3 in the first cavity 6. In this way, the size of the gas sensor device 100 in the length direction L or the width direction W can be reduced, which is conducive to the miniaturization of the gas sensor device 100. In the related art, the extension direction of the cable 3 in the first cavity 6 is perpendicular to the partition wall 107. The longer the cable 3 accommodated in the first cavity 6, the more the size of the gas sensor device 100 needs to be increased. The size of the gas sensor device is affected or limited by the length of the cable accommodated in the housing. In the present application, the partition wall 107 is at least partially parallel to the extension direction of the cable 3 in the first cavity 6. For the cable 3 accommodated in the first cavity 6, the size that the gas sensor device 100 needs to increase is the thickness or width direction of the cable 3, such as the diameter of the cable 3. In this way, the influence of the cable 3 accommodated in the first cavity 6 on the size of the gas sensor device 100 is reduced, which is conducive to the miniaturization of the gas sensor device 100.

[0076] In some embodiments, the second chamber 7 includes a first sub-chamber 71 and a second sub-chamber 72, and the first sub-chamber 71 is connected to the second sub-chamber 72. Along the height direction H of the gas sensor device 100, the first sub-chamber 71 is close 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 sensor device 100, the first top wall 1011 is close to the bottom wall 103 relative to the second top wall 1012, and the first top wall 1011 and the second top wall 1012 are respectively located on both sides of the second sub-chamber 72. The housing 1 includes a connecting wall 104, and the first top wall 1011 and the second top wall 1012 are both connected to the connecting wall 104; along the height direction HH of the gas sensor device 100, the connecting wall 104 is at least partially close 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 at the periphery of the second sub-chamber 72, and the first top wall 1011 and the side wall 102 are located at 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 sensor 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.

[0077] In some embodiments, the gas detection probe 21 has a gas chamber 213 and an opening 212, and the opening 212 connects the gas chamber 213 and the outside of the gas detection probe 21. The gas detection probe 21 includes a detection element 210, and the detection element 210 is located in the gas chamber 213. The detection element includes a thermistor, such as an NTC, and the gas to be detected enters the gas chamber 213 through the opening 212 and contacts the detection element 210. After the detection element 210 contacts the gas to be detected, an electrical signal is generated, thereby realizing the detection of the gas to be detected by the gas detection probe 21.

[0078] In some embodiments, the gas chamber 213 is in communication with the second sub-chamber 72, and the second sub-chamber 72 is in communication with the outside of the gas sensing device 100. The second top wall 1012 includes a first perforated portion 105, the first perforated portion 105 is located at the periphery of the second sub-chamber 72, the first perforated portion 105 has a first perforated hole 1051, the first perforated hole 1051 passes through the second top wall 1012, the first perforated hole 1051 is in communication with the outside of the gas sensing device 100, and the first perforated hole 1051 is in communication with the second sub-chamber 72. The first perforated portion 105 includes a first hole wall, and the first hole wall is located at the periphery of the first perforated hole 1051.

[0079] In some embodiments, the inner cavity 10 includes a third cavity 8, the third cavity 8 is connected to the first cavity 6, and the third cavity 8 is connected to the second cavity 7. When the cable 3 and the housing 1 are in the first connection state, the cable 3 is at least partially located in the third cavity 8, for example Figure 7 to Figure 9 The cable 3 is led out from the second cavity 7 , passes through the third cavity 8 for bending transition, and then extends into the first cavity 6 , and the housing 1 and the cable 3 are connected in a limited position in the first cavity 6 .

[0080] In some embodiments, the housing 1 has a first communication port 81 and a second communication port 82, wherein the first communication port 81 connects the first cavity 6 and the third cavity 8, and the second communication port 82 connects the second cavity 7 and the third cavity 8. Along the length direction L or the width direction W of the gas sensor, 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, for example Figures 7 to 9 As shown, along the length direction L of the shell 1, the second cavity 7 and the third cavity 8 are respectively located on both sides of the second communication port 82; along the width direction W of the shell 1, the first cavity 6 and the third cavity 8 are respectively located on both sides of the first communication port 81. The first side wall 1021 and the fourth side wall 1024 are both located at the periphery of the third cavity 8. Along the length direction L of the shell 1, the first communication port 81 is located between the partition wall 107 and the first side wall 1021. Along the width direction W of the shell 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 communication 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 communication port 81.

[0081] In some embodiments, the partition wall 107 is located at 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 .

[0082] In some embodiments, the gas detection device further includes a support 23 and a waterproof breathable membrane 24, for example Figure 2As shown. The support member 23 includes a second perforated portion 106, and the second perforated portion 106 has a second perforated hole 1061, and the second perforated hole 1061 penetrates the support member 23. The second perforated portion 106 includes a second hole wall, and the second hole wall is located at the periphery of the second perforated hole 1061. The support member 23 is located in the second sub-chamber 72, and 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. In the 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 air-permeable membrane 24 completely covers the first perforated portion 105 , and the waterproof air-permeable membrane 24 completely covers the second perforated portion 106 .

[0083] 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 .

[0084] In some embodiments, the first perforated portions 105 are arranged in one row, two rows, or multiple rows, and each row of the 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 and one round hole are arranged in a row, for example Figure 1 and Figure 2 ,or Fig.15 and Fig.16 Show.

[0085] 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.

[0086] 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, which is located at the periphery of the second perforated portion 106; in a direction perpendicular to the height direction H of the gas sensor device 100, the edge portion is close 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 ways, the support member 23 can also be connected to the second top wall 1012 by other means, such as bonding, laser welding, friction welding, etc. In some embodiments, the support member 23 and the connecting wall 104 are clearance-matched.

[0087] In some embodiments, the support member 23 is a sheet-like or plate-like member, and the support member 23 is perpendicular to the height direction H of the gas sensing device 100 .

[0088] In some embodiments, the method for manufacturing the housing 1 comprises the following steps:

[0089] S1. Provide a housing 1, wherein the housing 1 comprises a second top wall 1012, and the first perforated portion 105 comprises a first perforated hole 1051, and the first perforated hole 1051 is disposed through the second top wall 1012;

[0090] S2. Provide a substrate, wherein the substrate has a second through hole 1061, and the second through hole 1061 is arranged through the substrate, the substrate has a first side surface and a second side surface, and along the thickness direction of the substrate, the first side surface and the second side surface are respectively located at two sides of the substrate, and the substrate includes a flange portion, the flange portion is connected to the first side surface, and the flange portion is arranged to protrude from the first side surface;

[0091] 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.

[0092] In some embodiments, the energy source for melting the flange portion in step S3 includes, but is not limited to, laser, ultrasonic wave, and friction. That is, the support member 23 can be connected to the housing 1 by laser welding, ultrasonic welding, friction welding, and the like.

[0093] In some embodiments, the housing 1 includes a first shell 11 and a second shell 12, for example Figures 2 to 6 as shown, or Figure 16 to Figure 19 As shown. The first shell 11 and the second shell 12 have a first mating state and a second mating state, and 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 the connection between the first shell 11 and the second shell 12 can be switched from the second mating state to the first mating state. In the first connection state, the cable 3 is limitedly connected with at least one of the first shell 11 and the second shell 12. In the first mating state, the first shell 11 is separated from the second shell 12. In the second mating state, the first shell 11 and the second shell 12 are matched, the first shell 11 and the second shell 12 are fixedly connected or 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. In other words, the first shell 11 and the second shell 12 are detachably connected, and the disassembly of the first shell 11 and the second shell 12 will not destroy the structure of the first shell 11 and the second shell 12. In this way, the disassembly of the cable 3 and the housing 1 is further facilitated. 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 and one of the first housing 11 and the second housing 12 may be separated.

[0094] 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 the first surface 111 at least partially contacts the second housing 12. When the first housing 11 and the second housing 12 are in the second mating state, the first outer surface 112 is exposed to the outside of the gas sensor device 100. The first housing 11 has a first groove 113, which is formed by being recessed from the first surface 111 to the inside of the first housing 11. The first groove 113 passes 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, the first notch 1135 is located on the first outer surface 112, and the second notch 1136 is located on the first surface 111. The first notch 1135 and the second notch 1136 both pass through the first surface 111 and the first outer surface 112. The first housing 11 has a first groove wall 1131, which is located on 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 arranged 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, the second surface 121 at least partially covers the second notch 1136, and the second surface 121 is at least partially located at the periphery of the first groove 113, or in other words, the second surface 121 is at least partially located at 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 the first protrusion 122 is at least partially in contact with the first groove wall 1131; the first protrusion 122 is at least partially located at the periphery of the opening 60. In this way, after the first shell 11 and the second shell 12 are separated, the cable 3 can be easily removed from the first groove 113 through the first notch 1135 and the second notch 1136, so that the cable 3 is separated from the housing 1.

[0095] In some embodiments, the first notch 1135 is located on one side of the length or width direction W of the first shell 11, and the second notch 1136 is located on one side of the height direction H of the second shell 12. In the present application, the length direction L of the first shell 11 is consistent with the length direction L of the gas sensor device 100, the width direction W of the first shell 11 is consistent with the width direction W of the gas sensor device 100, and the height direction H of the first shell 11 is consistent with the height direction H of the gas sensor device 100.

[0096] In some embodiments, the first groove wall 1131 includes a first sub-groove wall 1132 and a second sub-groove wall 1133, and 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 both sides 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.

[0097] In some embodiments, the first groove wall 1131 includes a first groove wall surface 1134, and the first groove wall surface 1134 is at least partially exposed to the first groove 113. The first housing 11 has a positioning groove 114, and the positioning groove 114 is formed by being recessed from the first groove wall surface 1134 to the inside of the first groove wall 1131, or 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, and the positioning groove 114 passes through the first groove wall surface 1134, and the positioning groove 114 passes through the first surface 111. The positioning groove 114 is at least partially used to form the stop groove 67.

[0098] In some embodiments, the positioning groove 114 includes a first positioning groove 1141 , the first protrusion 63 is located at the periphery of the first positioning groove 1141 , and the first positioning groove 1141 is away from the first notch 1135 relative to the first protrusion 63 . The first positioning groove 1141 is used to form a first stop groove 671 .

[0099] 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 at the periphery of the first positioning groove 1141, and the second protrusion 64 is away from the first notch 1135 relative to the first positioning groove 1141.

[0100] In some embodiments, the positioning groove 114 includes a second positioning groove 1142, the first protrusion 63 is located at the periphery of the second positioning groove 1142, the second positioning groove 1142 is close to the first notch 1135 relative to the first protrusion 63, and the second positioning groove 1142 passes 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, and 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 respectively located on both sides of the second positioning groove 1142.

[0101] In some embodiments, the first groove wall 1131 includes a stop surface 673, and the stop surface 673 connects the first groove wall 1134 and the wall of the second positioning groove 1142. When the first shell 11 and the second shell 12 are in the second connection state, the stop surface 673 and the first protrusion 63 are both located at the periphery of the second stop groove 672, and the stop surface 673 is closer to the opening 60 relative to the first protrusion 63.

[0102] 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 the housing 1 are in the first connection 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. At this time, the first protrusion 122 is used to form the second positioning groove 1142, or the first protrusion 122 is located at the periphery of 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 respectively located on both sides of the second positioning groove 1142.

[0103] In some embodiments, when the cable 3 and the housing 1 are in a first connection state, and the first shell 11 and the second shell 12 are in a 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.

[0104] In some embodiments, the first protrusion 122 has a notch 1223, and the first protrusion 122 has a third free end 1231. When the first shell 11 and the second shell 12 are in the second mating state, the third free end 1231 is located in the first groove 113. The notch 1223 is formed from the third free end 1231 to the inside 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 Figure 6 or Fig.18 As shown, the notch 1223 is semicircular, and a portion of the first notch 1135 is semicircular, and the two cooperate to form a circular opening 60.

[0105] In some embodiments, the first housing 11 has a second groove 115, the second groove 115 has a third notch 1152, the second groove 115 passes through the first surface 111, and the third notch 1152 is at least partially located on the first surface 111. The second groove 115 is in communication with the first groove 113, and the second groove 115 is at least partially used to form the second cavity 7. The first housing 11 includes a second groove wall 1151, the second groove wall 1151 is located at the periphery of the second groove 115, and the second groove wall 1151 is 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 at the periphery of the second groove 115, or in other words, the second surface 121 is at least partially located at the periphery of the second cavity 7.

[0106] 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 the 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 .

[0107] In some embodiments, the first housing 11 includes the first top wall 1011, the second top wall 1012, the side wall 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 close to the first surface 111 relative to the second top wall 1012. The first groove 113 is a groove formed by being recessed from the first top wall 1011 in a direction away from the first surface 111. In some embodiments, along the height direction H of the gas detection device, the first groove 113 is close to the first surface 111 relative to the second top wall 1012.

[0108] In some embodiments, the first housing 11 includes the first side wall 1021, the second side wall 1022, the third side wall 1023, and the fourth side wall 1024 described above, and the first housing 11 also includes the partition wall 107 described above. The first groove wall 1131 includes a portion of the first side wall 1021 and the partition wall 107, and the second groove wall 1151 includes the second side wall 1022, the third side wall 1023, the fourth side wall 1024, and the partition wall 107. In other words, the first groove wall 1131 and the second groove wall 1151 have a common wall portion, which is the partition wall 107, or 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 is used to form the first sub-groove wall 1132 described above, and the first side wall 1021 is used to form the second sub-groove wall 1133 described above.

[0109] In some embodiments, the first housing 11 has a third groove 116, which is recessed from the first surface 111 toward the inside of the first housing 11, and the third groove 116 at least partially forms a 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 at the periphery of the third groove 116, or in other words, the second surface 121 is at least partially located at the periphery of the third cavity 8.

[0110] In some embodiments, the first housing 11 has a fourth groove 117, the fourth groove 117 passes through the first surface 111, the fourth groove 117 has a fourth notch 1161, the fourth notch 1161 is at least partially located on the first surface 111, and the fourth groove 117 is disposed on the side wall 102. The first housing 11 includes a fourth groove wall 1171, and the fourth groove wall 1171 is located at the periphery of the fourth groove 117. The fourth groove wall 1171 includes a fourth groove bottom wall 1173 and a fourth groove side wall 1172, along the height direction H of the first housing 11, the fourth groove bottom wall 1173 and the fourth notch 1161 are respectively located on both sides of the fourth groove 117, and the fourth groove side wall 1172 is close to the fourth notch 1161 relative to the fourth groove bottom wall 1173. The second housing 12 includes a second protrusion 123, and the second protrusion 123 is disposed protruding from the second surface 121. The gas sensing device 100 also includes a sealing member 9, for example Fig. 9 or Fig.17 As shown. The seal 9 is at least partially accommodated in the fourth groove 117. When the first shell 11 and the second shell 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 shell 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 shell 11 and the second shell 12 are in the second mating state, the seal 9 is sealed and connected to the first shell 11, and the seal 9 is sealed and connected to the second protrusion 123.

[0111] In some embodiments, the fourth groove 117 includes a fifth notch 1174 and a sixth notch 1175, wherein the fifth notch 1174 is located at the first sub-groove wall 1132, and the sixth notch 1175 is located at the second sub-groove wall 1133. When the seal 9 is received in the third groove 116, the seal 9 is at least partially located in the first groove 113. In some embodiments, the fifth notch 1174 is closer to the first notch 1135 than the sixth notch 1175.

[0112] In some embodiments, the second housing 12 has a fifth groove 124, and the fifth groove 124 has a seventh notch 1244. The housing 1 has a sealing groove, and the sealing groove 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 sealing member 9 is at least partially accommodated in the fourth groove 117, and the sealing member 9 is at least partially accommodated in the fifth groove 124. The second housing 12 includes a fifth groove wall 1241, and the fifth groove wall 1241 is located at the periphery of the fifth groove 124. The fifth groove wall 1241 includes a fifth groove bottom wall 1243 and a fifth groove side wall 1242. Along the height direction H of the second housing 12, the fifth groove bottom wall 1243 and the seventh notch 1244 are respectively located on both sides of the fifth groove 124, and the fifth groove side wall 1242 is close to the seventh notch 1244 relative to 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.

[0113] In some embodiments, for example Figure 6 or Fig.18 As shown, 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 accommodated 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.

[0114] In some embodiments, the sealing member 9 is an elastic member, for example, the sealing member 9 is an elastic member made of rubber.

[0115] In some embodiments, when the first shell 11 and the second shell 12 are in the second mating state, the seal 9 is sealed and connected to both the first shell 11 and the second shell 12. In this way, it is possible to reduce the amount 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 and connected to both the fourth groove wall 1171 and the second protrusion 123, and the seal 9 is sealed and connected to the fifth groove wall 1241.

[0116] 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 spirit 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), characterized in that: 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 connection state and a second connection state. In the first connection state, the cable (3) and the housing (1) are fixedly connected or positionally connected. In the second connection 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 connection state to the first connection state.

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

3. The gas sensor device according to claim 1, characterized in that: 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 connection 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 sensor device according to claim 3, characterized in that: 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 connection 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 sensor device according to claim 4, characterized in that: 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 connection 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 sensor device according to claim 5, characterized in that: 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 sensor device according to claim 4, characterized in that: 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 connection 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 sensor device according to claim 7, characterized in that: 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 connection state, the third limiting portion (323) abuts against the first cavity wall (61), and at least one of the first limiting portion (321), 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 connection state, the first cavity (6) includes 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 sensor device according to claim 3, characterized in that: The convex portion (62) includes a third protruding portion (68), and an angle is formed between the third protruding 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 connection state, the third protrusion (68) abuts against the cable (3).

10. The gas sensor device according to any one of claims 1 to 9, characterized in that: 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 connection between the first shell (11) and the second shell (12) being switchable from the first mating state to the second mating state, and the connection between the first shell (11) and the second shell (12) being switchable 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 connection state, the cable (3) is fixedly connected or positionally connected to at least one of the first housing (11) and the second housing (12).

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