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1. (WO2014190466) SCREWDRIVER

Pub. No.:    WO/2014/190466    International Application No.:    PCT/CN2013/076250
Publication Date: Fri Dec 05 00:59:59 CET 2014 International Filing Date: Tue May 28 01:59:59 CEST 2013
IPC: B25B 17/00
B25B 15/04
Applicants: HANGZHOU GREAT STAR TOOLS CO., LTD.
杭州巨星工具有限公司
HANGZHOU GREAT STAR INDUSTRIAL CO., LTD.
杭州巨星科技股份有限公司
Inventors: WANG, Weiyi
王伟毅
Title: SCREWDRIVER
Abstract:
Disclosed is a screwdriver, comprising a screwdriver rod (1), a handle (2) and a speed increasing device (3), wherein the speed increasing device (3) comprises a central shaft (31) which is connected to the screwdriver rod (1) and is provided with a tooth portion on the outer periphery thereof. A first element (32), at least one gear (33) connected to the first element (32), and a gear sleeve (34) sheathed outside the gear (33) are arranged inside the handle (2), wherein teeth (341) engaged with the gear (33) are arranged in a corresponding position inside the gear sleeve (34), and the gear (33) is arranged at a side of the central shaft (31) and is engaged with the tooth portion (311) on the outer periphery of the central shaft (31). The screwdriver also comprises a lock structure, and thereby can solve the problem of low torque of a highly-efficient screwdriver.