Working tool

A working tool, comprising:

• a housing;
• a working mechanism disposed on a working portion of the housing and configured to grind or polish a workpiece, the working mechanism driven to work by a motor disposed within the housing;
• a switch disposed within a handle portion of the housing and configured to activate or deactivate the motor;
• and
• a lever disposed under the switch and having a first end connected to the housing, wherein the lever has a gap formed therein for accommodating a switch lock, the switch lock having a rotating shaft inserted therethrough, the rotating shaft having two ends both connected to the lever and surrounded by a torsion spring, the switch lock including a first portion extending out of the lever and a second portion hiding in the housing, wherein the second portion of the switch lock has a first engagement portion defined on a first side and a stopper portion defined on a second side thereof, the lever having a support portion proximal to and engageable with the first engagement portion, wherein the handle portion of the housing has a left push button and a right push button partially inserted therein from a left side and a right side, respectively, the left push button and the right push button each having a first end horizontally protruding out of the housing to act as a manipulation portion and a main body and a second end hiding in the housing, the second end of the left push button slidably fitting in the second end of the right push button to allow the left push button to move horizontally towards the right push button and the right push button to move horizontally towards the left push button, the second ends of the left push button and right push button having a reset mechanism interconnected therebetween, wherein the main bodies of the left push button and the right push button in the housing are formed with a first groove and a second groove, respectively, the lever having a first extension section and a second extension section formed at a second end thereof in correspondence with the positions of the first groove and the second groove, respectively, the first extension section and the second extension section extending in the first groove and the second groove, respectively, each of the first groove and the second groove having a second engagement portion formed on a groove wall thereof, each of the first extension section and the second extension section being provided with, at a side facing a corresponding second engagement portion, a third engagement portion engageable with the corresponding second engagement portion, wherein when the working tool is in a locked state, the first engagement portion engages with the support portion, the stopper portion being pushed against a fixation member disposed in the housing, each second engagement portion being disengaged from the corresponding third engagement portion, and wherein when the working tool is in an unlocked state, the first engagement portion is disengaged from the support portion, the stopper portion being apart from the fixation member, the second engagement portion on the first groove engaging with the third engagement portion on the first extension portion or the second engagement portion on the second groove engaging with the third engagement portion on the second extension portion.