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switches for electrical equipment

A technology of electrical equipment and switches, which is applied in the field of switches of electric tools, and can solve problems such as faults and deposition

Active Publication Date: 2019-04-30
ELRAD INT D O O
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Contaminants and dust deposit especially on the exposed contacts of the control circuit and cause malfunctions

Method used

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  • switches for electrical equipment
  • switches for electrical equipment
  • switches for electrical equipment

Examples

Experimental program
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Embodiment Construction

[0027] figure 1 A perspective side view of the switch 10 with the sliding varistor 20 is shown exploded. To this end, the switch 10 is constructed as a multi-piece switch consisting of the structural components sliding varistor 20 , circuit board 30 , housing lower part 40 , rotary switch 50 , housing upper part 60 and support 70 . In this embodiment, the switch 10 is used to control the adjustable rotational speed and right / left turn of the power tool, not shown.

[0028] The sliding varistor 20 is embodied as an ohmic sliding varistor 20 . The sliding varistor consists of a sliding element 21 with sliding contacts 22 . 1 , 22 . 2 assigned to it and a resistance sliding rail, which is not shown on the side of the circuit board 30 facing the housing lower part 40 . superior. For this purpose, the guide section 21.1 is moulded on the operating element 21.4. The guide section 21.1 carries the sliding contact receptacles 21.2, 21.3. The operating element 21.4 is embodied in ...

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PUM

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Abstract

The invention relates to a switch for an electric device, in particular for an electric tool, having a sliding rheostat (20) for adjusting the rotational speed of the electric device, a switch housing and at least one circuit board arranged in the switch housing (30), at least one circuit board is used to accommodate electrical components of the sliding rheostat. It is provided here that the movably mounted actuating element ( 21 . 4 ) of the sliding rheostat is introduced into the contact space ( 12 ) of the switch housing via the first passage ( 11 ) in a sealed manner in all adjustment positions of the actuating element and via the second Two feedthroughs (44.1) lead out of the contact space in a sealed manner. A switch is therefore provided which ensures reliable function even under heavily polluted ambient conditions.

Description

technical field [0001] The invention relates to a switch for electrical equipment, in particular for power tools, having a sliding varistor for adjusting the rotational speed of the electrical equipment, a switch housing and at least one circuit board arranged in the switch housing, the at least one circuit board Electrical components used to house sliding varistors. Background technique [0002] Such switches are used, for example, as multi-piece switches in electrical installations, in particular drills, electric screwdrivers and other electrical hand tools, or also in household appliances. For this purpose, the sliding varistor is adjusted via an at least linearly movable or pressed actuating element against the restoring force. Such sliding rheostats are known, which are arranged directly in the power circuit of an electrical installation or in a control circuit operating with low voltage and low current. Sliding rheostats operating in the low voltage and low current r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H9/04H01H9/06
CPCH01H9/04H01H9/061H01H9/063H01H13/52H01H19/38H01C10/50H01H19/06H01H19/46H01H2239/078
Inventor F·斯图雷克R·福德
Owner ELRAD INT D O O