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a micro switch

A technology of micro switch and moving contact piece, applied in the field of washing machines, can solve the problems of easy condensation of water droplets, reduced insulation resistance, complicated processing and assembly processes of insulating sleeves, etc., so as to avoid the reduction of insulation resistance and electrical corrosion, The effect of avoiding the reduction of the insulation distance and the corrosion of electrical appliances

Active Publication Date: 2021-01-22
FOSHAN SHUNDE HAIER ELECTRIC APPLIANCES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the existing washing machine, both the static contact piece connection part and the moving contact piece connection part of the micro switch are exposed to the air, and the working environment of the washing machine is dark and humid, and the connection part between the static contact piece connection part and the moving contact piece connection part Water droplets are easy to condense on the isolation plate, and water droplets dripping onto the connecting part of the moving contact piece will cause the insulation resistance to decrease, causing accidents such as leakage, ignition, arcing, and even fire. In addition, it will also cause electrical corrosion. Rust can also cause ignition and arcing
[0003] At the same time, the static contact piece and the moving contact piece of the existing micro switch are generally exposed to the air, or a non-airtight insulating sleeve is set outside the two, but this method is not conducive to the loss of water vapor, and it is also easy to Condensation water droplets and electrical corrosion, in addition, the above-mentioned insulating sleeve processing and assembly process is more complicated and the cost is higher

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0041] Such as Figure 1-5 As shown, in this embodiment, the left and right sides of the isolation plate 2 are respectively provided with a downwardly extending water retaining rib 9, and the water retaining rib 9 is correspondingly arranged on the outside of the connecting part 3 of the moving contact piece, so as to avoid condensation of water The beads drop onto the connecting part 3 of the moving contact piece, and the water retaining rib 9 extends forward from the rear end of the isolation plate 2 , and its extension length is greater than or equal to the corresponding length of the connecting part 3 of the moving contact piece.

[0042] Through the above setting, the water droplets formed by the condensation of water mist on the isolation plate 2 corresponding to the connecting part 3 of the moving contact piece can all drip from the water retaining rib 9, thereby avoiding it from dripping onto the connecting part 3 of the moving contact piece .

[0043] Preferably, the...

Embodiment 2

[0054] Such as Figure 2-5 As shown, the difference between this embodiment and Embodiment 1 is that the micro switch also includes a static contact piece 7 and a moving contact piece 4 located below the static contact piece 7, and the front ends of the static contact piece 7 and the moving contact piece 4 are connected to the The other side of the base 8 is fixedly connected, and the rear ends of the static contact piece 7 and the moving contact piece 4 are respectively provided with a static contact point 6 and a moving contact piece 5, and the static contact piece 7 and the moving contact piece 4 are arranged on the same side as the base. 8 phases are fixedly connected and inside the airtight casing 13, a guide post 12 is provided below the movable contact 5, the upper end of the guide post 12 is set inside the casing 13, and is snap-fitted with the casing 13, and the lower end of the guide post 12 passes through Passes through the housing 13 and is arranged outside the hou...

Embodiment 3

[0061] Such as Figure 2-5 As shown, the difference between this embodiment and Embodiments 1 and 2 is that the housing 13 includes a first housing 10 and a second housing 14, the first housing 10 is fixedly connected to the base 8, and the second housing 14 It is detachably connected with the first casing 10 to realize the opening and closing of the casing 13 .

[0062] The shell 13 arranged above can be opened to facilitate later maintenance.

[0063] Preferably, the first housing 10 is provided with at least one pair of opposite protrusions or grooves, and the second housing 14 is provided with corresponding grooves or protrusions, and the protrusions and grooves are snap-fitted and connected. , so as to realize the fixed connection between the first housing 10 and the second housing 14 .

[0064] The above arrangement makes the assembly and disassembly of the first casing 10 and the second casing 14 easier and quicker.

[0065] Specifically, the shell 13 is divided long...

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PUM

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Abstract

A novel microswitch comprises an isolation plate, a movable contact plate connection portion located below the isolation plate, and a base. The isolation plate and the rear end of the movable contact plate connection portion are fixedly connected to one side of the base respectively. A downwards-extending water prevention rib is disposed on each of the left side and the right side of the isolation plate, and the water prevention ribs are correspondingly disposed outside the movable contact plate connection portion, so as to prevent condensed water droplets from dropping to the movable contact plate connection portion. In the present invention, by means of the water prevention ribs, condensed water droplets are prevented from dropping to the movable contact plate connection portion. Specifically, in a process in which water mist on the surface of the isolation plate is condensed into water droplets, the water droplets gradually move to the water prevention ribs along the surface of the isolation plate, and the condensed water droplets finally fall off from the lower end of the water prevention ribs. In this way, the insulation resistance is prevented from becoming smaller and electrical corrosion is avoided, and accordingly, electric leakage, ignition arcing and other accidents caused by the reduction of the insulation distance are avoided.

Description

technical field [0001] The invention relates to the field of washing machines, in particular to a micro switch. Background technique [0002] In the existing washing machine, both the static contact piece connection part and the moving contact piece connection part of the micro switch are exposed to the air, and the working environment of the washing machine is dark and humid, and the connection part between the static contact piece connection part and the moving contact piece connection part It is easy to condense water droplets on the isolation plate, and the water droplets dripping onto the connecting part of the moving contact piece will cause the insulation resistance to decrease, causing accidents such as leakage, ignition, arcing, and even fire. In addition, it will also cause electrical corrosion. Rust can also cause ignition and arcing. [0003] At the same time, the static contact piece and the moving contact piece of the existing micro switch are generally expose...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H9/02H01H9/04
CPCH01H9/0264H01H9/04
Inventor 邵长城周瑞元刘云凤袁敬鹏
Owner FOSHAN SHUNDE HAIER ELECTRIC APPLIANCES CO LTD