Waterproof pressure switch

Abstract

The utility model discloses a waterproof pressure switch which comprises a switch body, and a switch element and a pneumatic element used for controlling the action of the switch element are arranged in the switch body. The pneumatic element is located at one end of the switch element, and the other end of the switch element is electrically connected with a lead extending out of the switch body. A first cavity and a second cavity which are independent from each other are arranged in the switch body; the pneumatic element and the switch element are located in the first cavity, the electric connection portion of the switch element and the lead is located in the second cavity, and the second cavity is filled with epoxy resin. Due to the adoption of the technical scheme, compared with the prior art, the waterproof pressure switch disclosed by the utility model can reach the dustproof and waterproof grade of IP67, can be soaked in water with the depth of 1 meter for a short time, and can meet the requirements of some equipment. And meanwhile, the waterproof pressure switch is provided with the lead, so that the waterproof pressure switch can be conveniently and directly connected into an equipment circuit, and the procedure of additionally preparing a plug wire terminal to be inserted into a switch plug in the equipment assembling process is omitted.

Description

Technical Field

[0001] This utility model relates to the field of switch technology, specifically to a waterproof pressure switch. Background Technology

[0002] A switch is a commonly used electronic device that can open a circuit, interrupt current, or redirect it to another circuit. There are many types of switches available on the market, such as rocker switches, push-button switches, rotary switches, emergency stop switches, and pressure switches. Pressure switches, in particular, are components in equipment where pressure is used to control the on / off state of a circuit. During equipment manufacturing, two wires are connected to the circuit to be controlled, and the pressure switch interface is connected to the pneumatic circuit. Changes in the pneumatic pressure within the circuit automatically control the on / off state of the circuit.

[0003] However, the waterproof rating of ordinary pressure switches is generally IP65. Although it can prevent the intrusion of sprayed water, some equipment operates in certain specific environments, which requires higher dust and water resistance for the equipment components. Ordinary pressure switches cannot meet the requirements. If they are used forcibly, it is easy to cause leakage and safety accidents. Summary of the Invention

[0004] This application provides a waterproof pressure switch to solve the problem that the waterproof rating of existing ordinary pressure switches is insufficient, which can only prevent the intrusion of sprayed water and cannot meet the dustproof and waterproof requirements of equipment components when certain equipment is working in certain specific environments.

[0005] To achieve the above objectives, this application adopts the following technical solution.

[0006] A waterproof pressure switch includes a switch body, a switch element and a pneumatic element for controlling the operation of the switch element are disposed within the switch body; the pneumatic element is located at one end of the switch element, and the other end of the switch element is electrically connected to a lead extending out of the switch body.

[0007] The switch body has a first cavity and a second cavity that are independent of each other; the pneumatic element and the switch element are located in the first cavity, the electrical connection part of the switch element and the lead wire is located in the second cavity, and the second cavity is filled with epoxy resin.

[0008] In some embodiments, the switching element includes a first contact, a second contact, and a third contact; the first contact and the second contact are connected by a conductive sheet, the second contact and the third contact are arranged opposite to each other, and the conductive sheet has an elastic tendency to bring the second contact closer to the third contact; the first contact and the third contact are each electrically connected to a lead wire.

[0009] In some embodiments, the pneumatic component includes a spring, a substrate, a rod, and an air passage; the switching element is located on one side of the substrate, and the spring is located on the other side of the substrate; the substrate has a through hole; one end of the rod is fixedly connected to one side of the spring, and the other end passes through the through hole and is aligned with the position of the conductive sheet; the spring has an elastic tendency to move the rod away from the conductive sheet; one end of the air passage communicates with the other side of the spring, and the other end communicates with the outside of the switch body.

[0010] In some embodiments, the switch body includes a housing and an end cap, one end of the end cap being detachably connected to one end of the housing, and the other end of the end cap being provided with the air passage.

[0011] In some embodiments, a base is provided between the outer shell and the end cap, and the cross-section of the base is U-shaped; one end of the base is provided with an opening, and the edge of the opening is provided with a first limiting member protruding outward; one end of the end cap connected to the outer shell is provided with a second limiting member protruding inward; one end of the base is locked in the second limiting member by the first limiting member, and the other end is inserted into the outer shell and divides the space inside the outer shell into the first cavity and the second cavity.

[0012] In some embodiments, the substrate is located inside the end cap, and the substrate abuts against one end of the base that has an opening.

[0013] In some embodiments, a sealing ring is further provided inside the end cap, and the sealing ring is located on the side of the spring sheet facing the air passage.

[0014] In some embodiments, a sealing sheet is sandwiched between the sealing ring and the substrate.

[0015] In some embodiments, the edge of the sealing ring protrudes towards the air passage, and the end cap has an annular groove, with the edge of the sealing ring fitting into the annular groove.

[0016] In some embodiments, the housing further includes a first insert and a second insert; the first contact is electrically connected to one end of the first insert, and the other end of the first insert extends through the base into the second cavity and is electrically connected to a lead wire via a terminal block; the third contact is electrically connected to one end of the second insert, and the other end of the second insert extends through the base into the second cavity and is electrically connected to another lead wire via a terminal block.

[0017] This application has at least the following technical effects or advantages: The waterproof pressure switch of this utility model can achieve an IP67 dustproof and waterproof rating, and can be submerged in water at a depth of 1 meter for a short time, meeting the requirements of certain equipment. At the same time, the waterproof pressure switch comes with its own wires, which can be easily and directly connected to the equipment circuit, eliminating the need to prepare additional wiring terminals for insertion into the switch contacts during equipment assembly. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a waterproof pressure switch according to one embodiment of this application;

[0019] Figure 2 This is a schematic diagram of the internal structure of a waterproof pressure switch in one embodiment of this application (switch open);

[0020] Figure 3 for Figure 2 A magnified view of a portion of region A in the diagram.

[0021] Figure 4 for Figure 1 The left view;

[0022] Figure 5 This is a schematic diagram of the internal structure of a waterproof pressure switch in one embodiment of this application (switch closed). Detailed Implementation

[0023] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0024] See Figures 1-5 A waterproof pressure switch includes a switch body 1, which contains a switch element and a pneumatic element for controlling the operation of the switch element. The pneumatic element is located at one end of the switch element, and the other end of the switch element is electrically connected to a lead 4 extending out of the switch body.

[0025] like Figure 2 As shown, the switch body 1 has a first cavity 5 and a second cavity 6 that are independent of each other; the pneumatic element and the switch element are located in the first cavity 1, the electrical connection part between the switch element and the lead wire is located in the second cavity 5, and the second cavity 6 is filled with epoxy resin.

[0026] Preferably, the switching element includes a first contact 21, a second contact 22, and a third contact 23; the first contact 21 and the second contact 22 are connected by a conductive sheet 24, the second contact 22 and the third contact 23 are arranged opposite to each other, and the conductive sheet 24 has an elastic tendency to bring the second contact 22 closer to the third contact 23; the first contact 21 and the third contact 23 are each electrically connected to a lead wire.

[0027] Preferably, the pneumatic component includes a spring 31, a substrate 32, a rod 33, and an air passage 34; the switching element is located on one side of the substrate 32, and the spring 31 is located on the other side of the substrate 32; the substrate 32 is provided with a through hole; one end of the rod 33 is fixedly connected to one side of the spring 31, and the other end passes through the through hole and is aligned with the position of the conductive sheet 24; the spring 31 has an elastic tendency to move the rod 33 away from the conductive sheet 24; one end of the air passage 34 is connected to the other side of the spring 31, and the other end is connected to the outside of the switch body 1.

[0028] Preferably, the switch body 1 includes a housing 11 and an end cap 12. One end of the end cap 12 is detachably connected to one end of the housing 11, and the other end of the end cap 12 is provided with an air passage 34. More preferably, the air passage 34 is threaded to connect it to a gas storage device. The gas storage device supplies gas into the air passage 34, causing the spring 31 to overcome its elasticity and push the rod 33 to move away from the air passage 34, thereby separating the first contact 21 from the third contact 23 and disconnecting the waterproof pressure switch. When the gas storage device stops supplying gas, the pressure inside the air passage 34 decreases, the spring 31 returns to its original position under its own elasticity, and the rod 33 moves towards the air passage 34, thereby bringing the first contact 21 into contact with the third contact 23 and closing the waterproof pressure switch.

[0029] Preferably, a base 13 is provided between the outer shell 11 and the end cap 12, and the cross-section of the base 13 is U-shaped; one end of the base 13 is provided with an opening, and the edge of the opening is provided with an outwardly protruding first limiting member 41; one end of the end cap 12 connected to the outer shell 11 is provided with an inwardly protruding second limiting member 42; one end of the base 13 is locked in the second limiting member 42 by the first limiting member 41, and the other end is inserted into the outer shell 11, dividing the space inside the outer shell 11 into a first cavity 5 and a second cavity 6.

[0030] Preferably, the substrate 32 is located inside the end cap 12, and the substrate 32 abuts against the end of the base 13 that has an opening.

[0031] Preferably, the end cap 12 is further provided with a sealing ring 7, which is located on the side of the spring piece 31 facing the air passage 34. Preferably, the edge of the sealing ring 7 protrudes towards the air passage 34, and the end cap 12 is provided with an annular groove, in which the edge of the sealing ring 7 is engaged. More preferably, a sealing sheet is sandwiched between the sealing ring 7 and the substrate 32, and the sealing sheet covers the spring piece 31.

[0032] Preferably, the housing 11 further includes a first insert 91 and a second insert 92; a first contact 21 is electrically connected to one end of the first insert 91, and the other end of the first insert 91 extends through the base 32 into the second cavity 5, and is electrically connected to a lead wire 4 via a connector terminal; a third contact 23 is electrically connected to one end of the second insert 92, and the other end of the second insert 92 extends through the base 32 into the second cavity 6, and is electrically connected to another lead wire 4 via a connector terminal. More preferably, the housing 11 also has an injection hole 10 near the lead wire 4, the injection hole 10 is located between the two leads 4, and the injection hole 10 communicates with the second cavity 6 to facilitate the injection of epoxy resin into the second cavity 6 through the injection hole 10. More preferably, the outer portion of the lead wire 4 is covered with a heat-shrink sleeve, which extends from the connection point between the lead wire 4 and the connector terminal to the outside of the housing 11.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A waterproof pressure switch, comprising a switch body, wherein a switching element and a pneumatic element for controlling the operation of the switching element are disposed within the switch body; the pneumatic element is located at one end of the switching element, and the other end of the switching element is electrically connected to a lead extending out of the switch body; characterized in that: The switch body has a first cavity and a second cavity that are independent of each other; the pneumatic element and the switch element are located in the first cavity, the electrical connection part of the switch element and the lead wire is located in the second cavity, and the second cavity is filled with epoxy resin.

2. The waterproof pressure switch according to claim 1, characterized in that: The switching element includes a first contact, a second contact, and a third contact; the first contact and the second contact are connected by a conductive sheet, the second contact and the third contact are arranged opposite to each other, and the conductive sheet has an elastic tendency to bring the second contact closer to the third contact; the first contact and the third contact are each electrically connected to a lead wire.

3. The waterproof pressure switch according to claim 2, characterized in that: The pneumatic component includes a spring, a base plate, a rod, and an air passage; the switching element is located on one side of the base plate, and the spring is located on the other side of the base plate; the base plate has a through hole; one end of the rod is fixedly connected to one side of the spring, and the other end passes through the through hole and is aligned with the position of the conductive sheet; the spring has an elastic tendency to move the rod away from the conductive sheet; one end of the air passage is connected to the other side of the spring, and the other end is connected to the outside of the switch body.

4. The waterproof pressure switch according to claim 3, characterized in that: The switch body includes a housing and an end cap. One end of the end cap is detachably connected to one end of the housing, and the other end of the end cap is provided with the air passage.

5. The waterproof pressure switch according to claim 4, characterized in that: A base is provided between the outer shell and the end cap, and the cross-section of the base is U-shaped. One end of the base is provided with an opening, and the edge of the opening is provided with a first limiting member that protrudes outward. The end of the end cap that is connected to the outer shell is provided with a second limiting member that protrudes inward. One end of the base is locked in the second limiting member by the first limiting member, and the other end is inserted into the outer shell and divides the space inside the outer shell into the first cavity and the second cavity.

6. The waterproof pressure switch according to claim 5, characterized in that: The substrate is located inside the end cap, and the substrate abuts against the end of the base that has an opening.

7. The waterproof pressure switch according to claim 6, characterized in that: The end cap is also provided with a sealing ring, which is located on the side of the spring sheet facing the air passage.

8. The waterproof pressure switch according to claim 7, characterized in that: A sealing sheet is sandwiched between the sealing ring and the substrate.

9. The waterproof pressure switch according to claim 7, characterized in that: The edge of the sealing ring protrudes towards the air passage, and the end cap has an annular groove, in which the edge of the sealing ring is engaged.

10. The waterproof pressure switch according to any one of claims 5-9, characterized in that: The housing also includes a first insert and a second insert; the first contact is electrically connected to one end of the first insert, and the other end of the first insert extends through the base into the second cavity and is electrically connected to a lead wire through a terminal block; the third contact is electrically connected to one end of the second insert, and the other end of the second insert extends through the base into the second cavity and is electrically connected to another lead wire through a terminal block.

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