Title:
作業工具
Document Type and Number:
Japanese Patent JP5032745
Kind Code:
B2
Abstract:
It is an object of the invention to provide an effective technique for simplifying the structure while maintaining the ease of operation for mounting and removing a tool bit in a tool holder of a power tool. The representative power tool may include tool bit (109), a tool holder (131), a bit holding member (115) , bit mounting hole (133), a through hole (135), an outside opening (135a), a bit mounting hole side opening (135b), an engaging member (137), a cylindrical operating member (139), a movement preventing portion (139a), a biasing member (141), a first engaging region (137, 109c), a second engaging region (137, 109d), and a third engaging region (137, 139c). With such construction, as the first, second and third engaging regions respectively cooperate, the tool bit can be automatically secured to the bit holding member simply by inserting the tool bit into the bit mounting hole of the bit holding member. Thus, mounting and removal of the tool bit can be achieved without a ring spring needed in the known tool holder.
Inventors:
Katsuhiko Sasaki
Tomoyuki Kondo
Tomoyuki Kondo
Application Number:
JP2005016130A
Publication Date:
September 26, 2012
Filing Date:
January 24, 2005
Export Citation:
Assignee:
Makita Corporation
International Classes:
B25B21/00
Domestic Patent References:
| JP11114848A | ||||
| JP7214406A | ||||
| JP2004148441A | ||||
| JP9174447A | ||||
| JP2000218557A | ||||
| JP2004154882A | ||||
| JP4038369U | ||||
| JP9108916A | ||||
| JP9011008A | ||||
| JP10277818A |
Foreign References:
| US20040056435 |
Attorney, Agent or Firm:
Tetsuyuki Iwata