Yichun Ma,Shisong Zhang,Guoliang Mou,Hongfeng Zhong,Fangshi Liu,Xiaoli Pang,Robert Baker,Brandon Martin
申请号：
US16408991
公开号：
US20190261557A1
申请日:
2019.05.10
申请国别(地区):
US
年份:
2019
代理人:
摘要：
The invention provides a grass trimmer and a cord delivering method for a grass trimmer, the grass trimmer comprises an extending rod, an housing, a grass trimming head, a handle, a main motor and a main switch, wherein the grass trimming head comprises a base, a cap and a spool having a first state relative static with the base, and the grass trimmer further comprises a cord delivering mechanism； the cord delivering mechanism comprises a cord delivering electronic switch independent of the main switch and a control device； and the cord delivering electronic switch operably electrically controls the control device to enable the spool to be in a second state capable of generating a rotary speed difference with the base. An operator does not need to interrupt work of the grass trimmer and can timely pay off required and the cord delivering operation is simple and convenient.
