Drill bit cleaning mechanism
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 南通旭越光电科技有限公司
- Publication Date
- 2018-03-06
- Estimated Expiration
- Not applicable · inactive patent
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Figure 1
Abstract
Description
technical field
[0001] The invention relates to an electric tool, in particular to a drill cleaning mechanism. Background technique
[0002] In the 1960s, with the development of battery manufacturing technology, battery-type electric tools without power cords using nickel-cadmium batteries as power sources appeared. But at that time, due to the high price, the development was slow. By the mid-to-late 1970s, due to the reduction in battery prices and shortened charging time, this type of power tool was widely used in Europe, America, and Japan. Electric tools were originally made of cast iron, and then aluminum alloy was used as the casing. In the 1960s, thermoplastic engineering plastics were applied to electric tools, and realized double insulation of electric tools, ensuring the safety of electric tools. Due to the development of electronic technology, electronic speed control electric tools also appeared in the 1960s. This kind of electric tool uses thyristor and oth...