Patent ID: 6840335
Filing Date: 2005-01-11
Classification: B25F

Abstract:
1. An electric power tool comprising: a tool unit having a tool body and a coupling member connected to a bottom side of said tool body, said coupling member having inside a receiving chamber defining a bottom opening and a lateral opening respectively at a bottom side and a lateral side of said coupling member, said bottom and lateral openings being in communication with each other, said coupling member having two conjunct grooves respectively positioned at bilateral sides of said chamber, said two conjunct grooves being parallel to each other and defining two openings facing to each other, said two conjunct grooves respectively defining two insertion holes at the same side of said coupling member, said two insertion holes facing said lateral opening, said coupling member having two curbs positioned inside said chamber and respectively at lower sides of said two conjunct grooves, each of said two curbs defining a root end and a free end, said two free ends facing to each other, each of said two curbs having a guide surface extending from said free end towards said lateral opening and said root end; and a battery pack having a housing and two locking members, said housing having a battery compartment inside and a top cover on which two parallel conjunct rails and two slots are formed, each of said two conjunct rails having a root portion and a rail portion, said two rail portions respectively extending from top sides of said two root portions towards opposite directions, said two slots being in communication with said battery compartment, said housing having two cavities at two opposite sides thereof, each of said two cavities having a through hole in communication with said battery compartment, each of said two locking members having a button, a locking portion, and an arm portion interconnecting said button and said locking portion, said two locking members being respectively connected to said housing to enable said two buttons respectively to be positioned inside said two cavities, to enable said two arm portions to be inserted into said two through holes, and to enable said two locking portions to respectively pass through and protrude out of said top cover to be further positioned under said two rail portions of said two conjunct rails.