Pressure switch

Abstract

The present invention provides a pressure switch, comprising an outer shell, an inner shell, a first lead wire, a second lead wire, a moving contact and a static contact, wherein the inner shell is located inside the outer shell, the moving contact and the static contact are located inside the inner shell, and a sealant is potted between the inner shell and the outer shell, the first inner embedded section of the first lead wire is located inside the outer shell, the wire core end of the first inner embedded section is electrically connected to a first conductive plug, the first conductive plug passes through the inner shell and is electrically connected to the moving contact, the second inner embedded section of the second lead wire is located inside the outer shell, the wire core end of the second inner embedded section is electrically connected to a second conductive plug, the second conductive plug passes through the inner shell and is electrically connected to the static contact, and the first inner embedded section and the second inner embedded section are arranged crosswise with each other. The pressure switch of the present invention can effectively improve the internal sealing, thereby solving the problem of non-conduction between the switch contacts caused by oxidation of the internal metal parts of the pressure switch, thereby improving the working reliability of the pressure switch, improving the service life, and reducing the after-sales maintenance cost.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure protection devices, and in particular to a pressure switch capable of effectively improving internal sealing performance. Background Art

[0002] The pressure switch is a device combined with an electrical switch. When the preset fluid pressure is reached, the switch contacts are activated to provide pressure protection. For example, it is used in air conditioning and other refrigeration systems to prevent the compressor from evacuating. In air conditioning and other refrigeration systems, there is a large amount of condensed water on the surrounding pipes and compressors where the pressure switch is installed, and the pressure switch is facing the fan port, which is equivalent to the pressure switch being in an open-air working state without any shelter and will be attacked by rain.

[0003] See also Figure 1 In the prior art pressure switch, the connection sections 121 and 131 of the lead wires 12 and 13 and the plugs 14 and 15 are hidden by filling the sealant 16 in the switch housing 11, so as to protect the lead wires 12 and 13. In the after-sales maintenance of refrigeration systems such as air conditioners, a large number of internal metal wire cores of the prior art pressure switch are oxidized, resulting in the problem of non-conduction between the switch contacts 17 and 18, and the pressure switch fails.

[0004] After analysis and confirmation, the connecting sections 121, 131 of the lead wires 12, 13 at both ends of the existing pressure switch embedded in the sealant 16 are both straight sections extending from the conductive plugs 14, 15 perpendicular to the potting interface 161 of the sealant 16 and are arranged parallel to each other, that is, the intersection position of each lead wire 12, 13 of the existing pressure switch with the potting interface 161 is arranged in a direction perpendicular to the potting interface 161 corresponding to the conductive plugs 14, 15 connected to the lead wires 12, 13, so that the length of the connecting sections 121, 131 of the lead wires 12, 13 embedded in the sealant 16 is relatively short, about 1.5 mm. During the installation and use of the existing pressure switch, there is a long-term back-and-forth bending phenomenon between the lead wires 12 and 13 of the pressure switch and the potting interface 161 of the sealant 16, resulting in an obvious gap between the outer periphery of the lead wires 12 and 13 that are straight segments and parallel to each other and the potting cooperation of the sealant 16. Under the working conditions of the unit operating at a high ambient temperature, the gap will expand and enlarge accordingly, and the condensed water generated during the operation of the unit will penetrate into the inner cavity of the pressure switch along the gap between the outer periphery of the connecting sections 121 and 131 of the lead wires 12 and 13 that are straight segments and parallel to each other and the potting cooperation of the sealant 16, causing the pressure switch to become damp. After long-term use, the metal wire core inside the pressure switch will oxidize and rust, causing the metal wire core to break and cause a non-conduction problem. It can be seen that the existing pressure switch in which the connecting sections 121 and 131 of the lead wires 12 and 13 at both ends are embedded in the sealant 16 are both straight sections and are arranged parallel to each other has the problem of insufficient sealing. It is easy for the metal wire core inside the pressure switch to oxidize, resulting in no conduction between the switch contacts. Once the pressure switch fails, the unit may not be able to start at the least, and the unit may not be protected in time when it is under high pressure. There is a safety hazard. In addition, the pressure switch must be vacuumed and fluorinated during after-sales replacement, which leads to a significant increase in after-sales maintenance costs. Summary of the invention

[0005] In order to achieve the main purpose of the present invention, the present invention provides a pressure switch that can effectively improve the internal sealing, thereby solving the problem of non-conduction between switch contacts caused by oxidation of internal metal parts of the pressure switch, thereby improving the working reliability of the pressure switch, increasing the service life, and reducing after-sales maintenance costs.

[0006] In order to achieve the main purpose of the present invention, the present invention provides a pressure switch, including an outer shell, an inner shell, a first lead wire, a second lead wire, a moving contact and a static contact, the inner shell is located in the outer shell, the moving contact and the static contact are located in the inner shell, and sealant is filled between the inner shell and the outer shell, the first inner embedded section of the first lead wire is located in the outer shell, the core end of the first inner embedded section is electrically connected to the first conductive plug, the first conductive plug passes through the inner shell and is electrically connected to the moving contact, the second inner embedded section of the second lead wire is located in the outer shell, the core end of the second inner embedded section is electrically connected to the second conductive plug, the second conductive plug passes through the inner shell and is electrically connected to the static contact, and the first inner embedded section and the second inner embedded section are arranged crosswise with each other.

[0007] It can be seen from the above scheme that the first inner embedded section of the first lead wire of the pressure switch of the present invention is located in the outer shell, the wire core end of the first inner embedded section of the first lead wire passes through the inner shell through the first conductive plug and is electrically connected to the moving contact, and the second inner embedded section of the second lead wire is located in the outer shell, the wire core end of the second inner embedded section of the second lead wire passes through the inner shell through the second conductive plug and is electrically connected to the static contact. Since the inner shell and the outer shell are filled with sealant, the first inner embedded section of the first lead wire and the second inner embedded section of the second lead wire are filled in the outer shell with the sealant. Since the first inner embedded section of the first lead wire and the second inner embedded section of the second lead wire of the present invention are arranged crosswise with each other, and the sealant and the first lead wire are arranged crosswise with each other, the sealant and the first lead wire are arranged crosswise with each other. The intersection interface between the lead and the second lead is a potting interface, and the connecting sections of the lead at both ends of the existing pressure switch embedded in the sealant are all straight sections extending from the conductive plug perpendicular to the potting interface and arranged in parallel with each other, that is, the intersection position of each lead of the existing pressure switch with the potting interface is arranged corresponding to the conductive plug connected to the lead in the direction perpendicular to the potting interface, while the first end of the first inner embedding section adjacent to the potting interface and the second end of the first inner embedding section adjacent to the first conductive plug are staggered in the direction perpendicular to the potting interface, or the first end of the second inner embedding section adjacent to the potting interface and the second end of the second inner embedding section adjacent to the second conductive plug are staggered in the direction perpendicular to the potting interface. The first lead wire or the second lead wire is staggered in a direction perpendicular to the potting interface. Even if there is a long-term back-and-forth bending phenomenon between the first lead wire or the second lead wire and the potting interface of the sealant, so that the first end of the first inner block segment or the first end of the second inner block segment may have a gap with the potting interface, no gap will be generated between the second end of the first inner block segment staggered in a direction perpendicular to the potting interface or the second end of the second inner block segment staggered in a direction perpendicular to the potting interface and the sealant, and the first end of the first inner block segment is staggered with the second end of the first inner block segment or the first end of the second inner block segment is staggered with the second end of the second inner block segment. The staggered arrangement of the second ends of the segments can increase the length of the first inner segment or the second inner segment that is sealed in the outer shell by the sealant, thereby completely preventing the second end of the first inner segment or the second end of the second inner segment from forming a gap with the sealant, thereby effectively preventing water vapor from penetrating into the interior of the outer shell along the first inner segment or the second inner segment, thereby causing the metal wire core and the conductive plug to become damp and oxidize and rust. It can be seen that the pressure switch of the present invention can effectively improve the internal sealing, solve the problem of non-conduction between the switch contacts caused by oxidation of the internal metal parts of the pressure switch, thereby improving the working reliability of the pressure switch of the present invention, increasing the service life, and reducing the after-sales maintenance cost.

[0008] A further solution is that the intersection interface between the sealant and the first lead wire is a potting interface, the first embedded segment includes a first vertical segment and a first horizontal segment connected to each other, the first vertical segment is arranged away from the first conductive plug, and the extension direction of the first vertical segment is arranged perpendicular to the potting interface, the first horizontal segment is arranged adjacent to the first conductive plug, the first horizontal segment extends along the outer peripheral surface of the inner shell close to the potting interface, and the angle between the extension direction of the first horizontal segment and the extension direction of the first vertical segment is an acute angle, a right angle or an obtuse angle, the second embedded segment and the first horizontal segment are arranged to cross each other, or the second embedded segment and the first vertical segment are arranged to cross each other.

[0009] A further solution is that the second inner segment includes a second vertical segment and a second horizontal segment connected to each other, the second vertical segment is arranged away from the second conductive plug, and the extension direction of the second vertical segment is arranged parallel to the extension direction of the first vertical segment, the second horizontal segment is arranged adjacent to the second conductive plug, and the second horizontal segment extends along the outer peripheral surface of the inner shell close to the potting interface and is arranged to cross with the first horizontal segment.

[0010] A further solution is that a pressure sensor is provided in the bottom of the shell away from the first lead wire, the pressure sensor is used to drive the moving contact to move, and the bottom outer end surface of the shell is coated with waterproof glue; and / or the outer peripheral surface of the shell is coated with waterproof glue.

[0011] A further solution is that the waterproof glue is a high temperature resistant waterproof glue.

[0012] A further solution is that the sealant is epoxy sealant.

[0013] A further solution is that a first lead end of the first lead wire away from the shell and a second lead end of the second lead wire away from the shell are electrically connected to external terminals respectively, and the first lead wire and the second lead wire are wrapped in a wire sleeve, and the wire sleeve is located between the shell and the external terminal.

[0014] A further solution is that the intersection interface between the sealant and the first lead wire is a potting interface, the angle between the extension direction of the first inner embedment segment and the potting interface is an acute angle or an obtuse angle, and the angle between the extension direction of the second inner embedment segment and the potting interface is an acute angle or an obtuse angle.

[0015] A further solution is that, on a plane perpendicular to the axis of the pressure switch, a projection of the intersection of the first lead wire and the housing overlaps with a projection of the second conductive plug; and / or, on a plane perpendicular to the axis of the pressure switch, a projection of the intersection of the second lead wire and the housing overlaps with a projection of the first conductive plug.

[0016] A further solution is that a first sleeve is sleeved on the first lead wire, the first end of the first sleeve extends to the external setting of the shell, and the second end of the first sleeve extends to the internal setting of the shell; and / or, a second sleeve is sleeved on the second lead wire, the first end of the second sleeve extends to the external setting of the shell, and the second end of the second sleeve extends to the internal setting of the shell.

[0017] A further solution is that the first sleeve is a heat shrinkable sleeve, and / or the second sleeve is a heat shrinkable sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an existing pressure switch.

[0019] Figure 2 It is a front view of the first embodiment of the pressure switch of the present invention.

[0020] Figure 3 It is a front view of the partial structure of the first embodiment of the pressure switch of the present invention.

[0021] Figure 4 It is a top view of the local structure of the first embodiment of the pressure switch of the present invention.

[0022] Figure 5 It is a front view of the partial structure of the second embodiment of the pressure switch of the present invention.

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0024] The first embodiment of the pressure switch:

[0025] See also Figure 2 and Figure 4 The present embodiment discloses a pressure switch, comprising an outer shell 21, an inner shell 22, a first lead wire 23, a second lead wire 24, a moving contact 25 and a stationary contact 26, wherein the inner shell 22 is located inside the outer shell 21, the moving contact 25 and the stationary contact 26 are located inside the inner shell 22, and a sealant 211 is encapsulated between the inner shell 22 and the outer shell 21. In the present embodiment, the first inner segment 210 of the first lead wire 23 is located inside the outer shell 21, the wire core end of the first inner segment 210 is electrically connected to the first conductive plug 28, and the first conductive plug 28 passes through the inner shell 22 and is electrically connected to the moving contact 25. At the same time, the second inner segment 29 of the second lead wire 24 of the present embodiment is located inside the outer shell 21, the wire core end of the second inner segment 29 is electrically connected to the second conductive plug 27, and the second conductive plug 27 passes through the inner shell 22 and is electrically connected to the stationary contact 26. Moreover, the first inner segment 210 and the second inner segment 29 of the present embodiment are arranged crosswise with each other.

[0026] The first inner section 210 of the first lead wire 23 of the pressure switch of the present embodiment is located in the outer shell 21, and the wire core end of the first inner section 210 of the first lead wire 23 passes through the inner shell 22 through the first conductive plug 28 and is electrically connected to the moving contact 25, and the second inner section 29 of the second lead wire 24 is located in the outer shell 21, and the wire core end of the second inner section 29 of the second lead wire 24 passes through the inner shell 22 through the second conductive plug 27 and is electrically connected to the static contact 26. Since the sealant 211 is potted between the inner shell 22 and the outer shell 21, the first inner section 210 of the first lead wire 23 and the second inner section 29 of the second lead wire 24 are potted in the outer shell 21 by the sealant 211. The inner embedded section 210 and the second inner embedded section 29 of the second lead wire 24 are arranged crosswise with each other, and the intersection interface between the sealant 211 and the first lead wire 23 and the second lead wire 24 is the potting interface 2111. Compared with the existing pressure switch, the connecting sections 121 and 131 of the lead wires at both ends embedded in the sealant 211 are straight sections extending from the conductive plugs 14 and 15 perpendicular to the potting interface 2111 and arranged parallel to each other, that is, the intersection position of each lead wire 12 and 13 of the existing pressure switch with the potting interface 2111 is arranged in a direction perpendicular to the potting interface 2111 corresponding to the conductive plugs 14 and 15 connected to the lead wires 12 and 13, while the first inner embedded section 210 of the present embodiment is adjacent to the potting interface 2111. The first end of the surface 2111 and the second end of the first inner embedded section 210 adjacent to the first conductive plug 28 are staggered in a direction perpendicular to the potting interface 2111, or the first end of the second inner embedded section 29 adjacent to the potting interface 2111 and the second end of the second inner embedded section 29 adjacent to the second conductive plug 27 are staggered in a direction perpendicular to the potting interface 2111. Even if there is a long-term back-and-forth bending phenomenon between the first lead wire 23 or the second lead wire 24 and the potting interface 2111 of the sealant 211, so that there may be a gap between the first end of the first inner embedded section 210 or the first end of the second inner embedded section 29 and the potting interface 2111, in the direction perpendicular to the potting interface 2111, No gap will be generated between the second end of the first inner segment 210 staggered with the first end of the first inner segment 210 or the second end of the second inner segment 29 staggered with the first end of the second inner segment in a direction perpendicular to the potting interface 2111 and the sealant 211, and the staggered arrangement of the first end of the first inner segment 210 and the second end of the first inner segment 210 or the staggered arrangement of the first end of the second inner segment 29 and the second end of the second inner segment 29 can increase the length of the first inner segment 210 or the second inner segment 29 potted in the housing 21 by the sealant 211, thereby completely preventing the second end of the first inner segment 210 or the second end of the second inner segment 29 from being potted with the sealant 211.Thus, it can effectively prevent water vapor from penetrating into the interior of the housing 21 along the first inner section 210 or the second inner section 29, causing the metal wire core and the first conductive plug 28 and the second conductive plug 27 to be oxidized and rusted due to moisture. It can be seen that the pressure switch of this embodiment can effectively improve the internal sealing, solve the problem of non-conduction between switch contacts caused by oxidation of the internal metal parts of the pressure switch, thereby improving the working reliability of the pressure switch of this embodiment, increasing the service life, and reducing the after-sales maintenance cost.

[0027] Specifically, the intersection interface between the sealant 211 of the pressure switch of this embodiment and the first lead wire 23 and the second lead wire 24 is a potting interface 2111. The first embedded section 210 of the first lead wire 23 includes a first vertical section 2101 and a first horizontal section 2102 connected to each other. The first vertical section 2101 is arranged away from the first conductive plug 28, and the extension direction of the first vertical section 2101 is arranged perpendicular to the potting interface 2111. The first horizontal section 2102 is arranged adjacent to the first conductive plug 28. The first horizontal section 2102 is arranged along the inner The shell 22 extends along the outer peripheral surface close to the potting interface 2111, and the angle between the extension direction of the first horizontal segment 2102 and the extension direction of the first vertical segment 2101 is an acute angle, a right angle, or an obtuse angle, that is, the angle between the extension direction of the first horizontal segment 2102 and the extension direction of the first vertical segment 2101 is not a right angle of 180°, and the second embedded segment 29 of the second lead-out line 24 and the first horizontal segment 2102 are intersected with each other, or the second embedded segment 29 of the second lead-out line 24 and the first vertical segment 2101 are intersected with each other. At the same time, the second embedded section 29 of the second lead-out line 24 of the present embodiment includes a second vertical section 291 and a second horizontal section 292 which are connected to each other. The second vertical section 291 is arranged away from the second conductive plug 27, and the extension direction of the second vertical section 291 is arranged parallel to the extension direction of the first vertical section 2101. The second horizontal section 292 is arranged adjacent to the second conductive plug 27, and the second horizontal section 292 extends along the outer peripheral surface of the inner shell 22 close to the potting interface 2111 and is arranged to cross with the first horizontal section 2102. In this embodiment, the first horizontal section 2102 of the first inner segment 210 of the first lead-out line 23 extends along the outer circumferential surface of the inner shell 22 close to the potting interface 2111, and the second horizontal section 292 of the second inner segment 29 of the second lead-out line 24 extends along the outer circumferential surface of the inner shell 22 close to the potting interface 2111 and is arranged to intersect with the first horizontal section 2102, which can further extend the length of the first inner segment 210 and the second inner segment 29 embedded in the sealant 211, and can ensure that the first horizontal section 2102 of the first inner segment 210 and the second horizontal section 292 of the second inner segment 29 maintain seamless contact with the sealant 211, further effectively blocking the infiltration of water vapor. Moreover, on a plane perpendicular to the axis of the pressure switch, the projection of the intersection of the first lead wire 23 and the housing 21 overlaps with the projection of the second conductive plug 27; and / or, on a plane perpendicular to the axis of the pressure switch, the projection of the intersection of the second lead wire 24 and the housing 21 overlaps with the projection of the first conductive plug 28, which further effectively blocks the intrusion of water vapor and can reduce the overall volume of the pressure switch. Preferably, the sealant 211 of this embodiment is an epoxy sealant.

[0028] In order to further improve the sealing performance of the pressure switch, a pressure sensor 217 is provided in the bottom of the housing 21 of the pressure switch of this embodiment away from the first lead wire 23. The pressure sensor 217 is used to drive the moving contact 25 to move. The bottom outer end surface of the housing 21 is coated with waterproof glue (not marked) to prevent moisture and liquid from penetrating from the bottom of the housing 21. Furthermore, the outer peripheral surface of the housing 21 of the pressure switch of this embodiment is coated with waterproof glue (not marked), so that the outer peripheral surface of the housing 21 is waterproofed. Preferably, the waterproof glue of this embodiment is high temperature resistant waterproof glue.

[0029] The pressure switch in which the first horizontal section 2102 of the first inner embedded section 210 and the second horizontal section 292 of the second inner embedded section 29 are cross-arranged and the bottom outer end surface of the outer shell 21 is coated with waterproof glue is subjected to a 100°C, 12-hour boiling water test. After the test, the pressure switch was dissected and no water droplets were found inside the outer shell 21 of the pressure switch. It can be seen that the overall sealing performance of the pressure switch of this embodiment is greatly improved, which can effectively solve the problem of oxidation of internal metal parts due to water vapor infiltration in the existing pressure switch, resulting in non-conduction between switch contacts.

[0030] In order to further extend the service life of the pressure switch, in this embodiment, the first lead-out end of the first lead-out wire 23 away from the outer shell 21 and the second lead-out end of the second lead-out wire 24 away from the outer shell 21 are electrically connected to external terminals 215 and 216 respectively, and the first lead-out wire 23 and the second lead-out wire 24 are enclosed in a wire sleeve 214, and the wire sleeve 214 is located between the outer shell 21 and the external terminals 215 and 216, which can prevent the first lead-out wire 23 and the second lead-out wire 24 from being damaged by friction or scratches of external structures. Furthermore, in this embodiment, a first sleeve 212 is sleeved on the first lead wire 23, a first end of the first sleeve 212 extends to the external setting of the housing 21, and a second end of the first sleeve 212 extends to the internal setting of the housing 21, and in this embodiment, a second sleeve 213 is sleeved on the second lead wire 24, a first end of the second sleeve 213 extends to the external setting of the housing 21, and a second end of the second sleeve 213 extends to the internal setting of the housing 21, so that the first lead wire 23 and the second lead wire 24 can be effectively prevented from breaking at the intersection of the housing 21. Preferably, in this embodiment, the first sleeve 212 is a heat shrink sleeve, so that the first sleeve 212 can be firmly wrapped around the outer periphery of the first lead wire 23, and the second sleeve 213 is a heat shrink sleeve, so that the second sleeve 213 can be firmly wrapped around the outer periphery of the second lead wire 24.

[0031] The second embodiment of the pressure switch:

[0032] As an explanation of the second embodiment of the pressure switch of the present invention, only the differences from the first embodiment of the pressure switch are explained below.

[0033] See also Figure 5 In this embodiment, the intersection interface between the sealant 211 of the pressure switch and the first lead 23 and the second lead 24 is a potting interface 2111, and the angle between the extension direction of the first inner segment 210' of the first lead 23 and the potting interface 2111 is an acute angle or an obtuse angle, and the angle between the extension direction of the second inner segment 29' of the second lead 24 and the potting interface 2111 is an acute angle or an obtuse angle, ensuring that the first inner segment 210' of the first lead 23 and the second inner segment 29' of the second lead 24 are arranged crosswise with each other, and the first inner segment 210' of the first lead 23 and the second inner segment 29' of the second lead 24 are respectively arranged obliquely with respect to the potting interface 2111, so that the first end of the first inner segment 210' adjacent to the potting interface 2111 and the first conductive plug 28 adjacent to the first inner segment 210' of this embodiment are The second end of the second inner embedment segment 29′ is staggered in a direction perpendicular to the potting interface 2111. At the same time, the first end of the second inner embedment segment 29′ adjacent to the potting interface 2111 and the second end of the second inner embedment segment 29′ adjacent to the second conductive plug 27 are staggered in a direction perpendicular to the potting interface 2111, thereby ensuring that no gap is generated between the second end of the first inner embedment segment 210′ ​​staggered with the first end of the first inner embedment segment 210′ ​​in a direction perpendicular to the potting interface 2111 and the second end of the second inner embedment segment 29′ staggered with the first end of the second inner embedment segment in a direction perpendicular to the potting interface 2111 and the sealant 211, which can effectively prevent water vapor from penetrating into the interior of the housing 21 along the first inner embedment segment 210′ ​​and the second inner embedment segment 29′ to cause the metal wire core and the conductive plug to become damp and oxidized and rusted, thereby greatly improving the sealing of the pressure switch of the present embodiment.

[0034] The above embodiments are only preferred examples of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made according to the structure, characteristics and principles of the patent application scope of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A pressure switch, comprising an outer shell, an inner shell, a first lead wire, a second lead wire, a moving contact and a stationary contact, wherein the inner shell is located inside the outer shell, the moving contact and the stationary contact are located inside the inner shell, and a sealant is potted between the inner shell and the outer shell; The first inner embedded section of the first lead wire is located in the outer shell, the wire core end of the first inner embedded section is electrically connected to a first conductive plug-in, and the first conductive plug-in passes through the inner shell and is electrically connected to the moving contact; The second inner embedded section of the second lead wire is located in the outer shell, the wire core end of the second inner embedded section is electrically connected to a second conductive plug, and the second conductive plug passes through the inner shell and is electrically connected to the static contact, characterized in that: The first inner block segment and the second inner block segment are arranged to cross each other, and the intersection interface between the sealant and the first lead wire is a potting interface; The first inner segment includes a first vertical segment and a first horizontal segment connected to each other, the first vertical segment is arranged away from the first conductive plug, and the extension direction of the first vertical segment is arranged perpendicular to the potting interface, the first horizontal segment is arranged adjacent to the first conductive plug, and the first horizontal segment extends along the outer peripheral surface of the inner shell close to the potting interface, the second inner segment includes a second vertical segment and a second horizontal segment connected to each other, the second vertical segment is arranged away from the second conductive plug, and the extension direction of the second vertical segment is arranged parallel to the extension direction of the first vertical segment, the second horizontal segment is arranged adjacent to the second conductive plug, and the second horizontal segment extends along the outer peripheral surface of the inner shell close to the potting interface and crosses the first horizontal segment; Alternatively, the angle between the extension direction of the first inner block segment and the encapsulation interface is an acute angle or an obtuse angle, and the angle between the extension direction of the second inner block segment and the encapsulation interface is an acute angle or an obtuse angle.

2. The pressure switch according to claim 1, characterized in that: A pressure sensor is provided in the bottom of the housing away from the first lead-out line, the pressure sensor is used to drive the moving contact to move, and the outer end surface of the bottom of the housing is coated with waterproof glue; And / or, the outer peripheral surface of the shell is coated with waterproof glue.

3. The pressure switch according to claim 2, characterized in that: The waterproof glue is high temperature resistant waterproof glue.

4. The pressure switch according to claim 1, characterized in that: The sealant is epoxy sealant.

5. The pressure switch according to claim 1, characterized in that: A first lead end of the first lead wire away from the housing and a second lead end of the second lead wire away from the housing are electrically connected to external terminals respectively. The first lead wire and the second lead wire are wrapped in a wire sleeve, and the wire sleeve is located between the housing and the external terminal.

6. The pressure switch according to any one of claims 1 to 5, characterized in that: On a plane perpendicular to the axis of the pressure switch, a projection of the intersection of the first lead wire and the housing overlaps with a projection of the second conductive plug; and / or On a plane perpendicular to the axis of the pressure switch, a projection of a point where the second lead wire intersects the housing overlaps with a projection of the first conductive plug.

7. The pressure switch according to any one of claims 1 to 5, characterized in that: A first sleeve is sleeved on the first lead-out wire, a first end of the first sleeve extends to the outside of the housing, and a second end of the first sleeve extends to the inside of the housing; And / or, a second sleeve is sleeved on the second lead wire, a first end of the second sleeve extends to an external arrangement of the shell, and a second end of the second sleeve extends to an internal arrangement of the shell.

8. The pressure switch according to claim 7, characterized in that: The first sleeve is a heat shrinkable sleeve, and / or the second sleeve is a heat shrinkable sleeve.

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