Title:
SCREWDRIVER
Document Type and Number:
WIPO Patent Application WO/2014/190466
Kind Code:
A1
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.
Inventors:
WANG WEIYI (CN)
Application Number:
PCT/CN2013/076250
Publication Date:
December 04, 2014
Filing Date:
May 27, 2013
Export Citation:
Assignee:
HANGZHOU GREAT STAR TOOLS CO LTD (CN)
HANGZHOU GREAT STAR IND CO LTD (CN)
HANGZHOU GREAT STAR IND CO LTD (CN)
International Classes:
B25B17/00; B25B15/04
Foreign References:
CN203390828U | 2014-01-15 | |||
CN203245784U | 2013-10-23 | |||
US20100294084A1 | 2010-11-25 | |||
CN202462319U | 2012-10-03 | |||
US20040092358A1 | 2004-05-13 | |||
CN101890688A | 2010-11-24 |
Attorney, Agent or Firm:
SUNRAY INTELLECTUAL PROPERTY ATTORNEYS (CN)
上海旭诚知识产权代理有限公司 (CN)
上海旭诚知识产权代理有限公司 (CN)
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