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Title:
SCREWDRIVER
Document Type and Number:
WIPO Patent Application WO/2019/046991
Kind Code:
A1
Abstract:
A screwdriver, comprising a shaft (2) and a handle body (1). A circular protruding ring (12) is provided at the front extremity of the handle body (1). A locking mechanism is provided between the circular protruding ring (12) and the shaft (2). A rotating cover (3) for unlocking the locking mechanism is sleeved on the circular protruding ring (12). The locking mechanism comprises an engaging fitting (4) and an engaging spring (5). An annular section groove (122) is provided at a side of the circular protruding ring (12). The engaging fitting (4) is provided within the annular section groove (122) and can rotate along the annular section groove (122). A grooved engaging position (211) is provided on the exterior of the shaft (2). The screwdriver is structurally reasonable, the shaft (2) and the handle body (1) are firmly connected; tightening force is great, reaches up to 500 N, and complies with European standards; operation is effortless; and, rapid removal and replacement of the shaft can be implemented. In addition, the overall size is reduced when the shaft (2) is removed, thus facilitating packaging and storage.

Inventors:
SUN CHENGGANG (CN)
SHEN BAIYONG (CN)
MA CHAO (CN)
Application Number:
PCT/CN2017/000622
Publication Date:
March 14, 2019
Filing Date:
October 17, 2017
Export Citation:
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Assignee:
CIXI CHENGJIA HARDWARE TOOLS CO LTD (CN)
International Classes:
B25B23/16; B25B15/00; B25G1/10
Foreign References:
US20120167725A12012-07-05
US20050178251A12005-08-18
CN105364768A2016-03-02
DE202010012971U12011-03-31
CN1675032A2005-09-28
Attorney, Agent or Firm:
NINGBO CHANNEL PATENT ATTORNEYS OFFICE (CN)
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