Title:
GRASS TRIMMER AND GRASS TRIMMING HEAD THEREOF
Document Type and Number:
WIPO Patent Application WO/2020/253678
Kind Code:
A1
Abstract:
A grass trimmer (100) and a grass trimming head (11) thereof, the grass trimmer comprising: the grass trimming head; a drive device (12); and an operating device (13). The grass trimming head comprises: a spool (112); a head shell (111) which forms an accommodation space (114); and a transmission member (113a) disposed on the spool and capable of moving freely between the head shell and the spool in the linear direction perpendicular to the direction of a rotation axis (101). A grass trimming rope (15) has an effective length extending from the accommodation space, and the grass trimming rope has a preset value within the effective length range. When the effective length of the grass trimming rope is less than the preset value, the transmission member automatically releases the head shell; and when the effective length of the grass trimming rope is greater than the preset value, the transmission member locks the head shell.
Inventors:
GUO JIANPENG (CN)
Application Number:
PCT/CN2020/096353
Publication Date:
December 24, 2020
Filing Date:
June 16, 2020
Export Citation:
Assignee:
NANJING CHERVON IND CO LTD (CN)
International Classes:
A01D34/16
Domestic Patent References:
| WO2016173657A1 | 2016-11-03 |
Foreign References:
| CN109691287A | 2019-04-30 | |||
| CN108135129A | 2018-06-08 | |||
| CN105815028A | 2016-08-03 | |||
| US20090260237A1 | 2009-10-22 | |||
| US20170347523A1 | 2017-12-07 | |||
| CN201910520911A | 2019-06-17 |
Other References:
See also references of EP 3973761A4
Attorney, Agent or Firm:
BEYOND ATTORNEYS AT LAW (CN)
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