Patent ID: 8557427

Claim:
An electric power tool comprising: a main body including a drive portion with a motor, an output portion for holding a tool, and a battery pack attachment portion; and a battery pack attached to the battery pack attachment portion by means of an attaching and detaching mechanism, the battery pack supplying electric power to the drive portion to operate the output portion, wherein the attaching and detaching mechanism includes a first release operation portion and a second release operation portion, and the battery pack is released from the main body by independently actuating the first and the second release operation portions, wherein the first release operation portion is arranged in the battery pack and includes an externally exposed user-operable button, and the second release operation portion is arranged in the main body and includes an externally exposed user-operable button, and wherein the battery pack attachment portion is downwardly opened and wherein the attaching and detaching mechanism includes a first retainer unit for retaining a top portion of the battery pack in the main body in a suspended state and a second retainer unit for retaining a bottom portion of the battery pack in the main body by supporting the bottom portion of the battery pack.