A portable electronic device, comprising:
- an operation portion, a rotating portion, a hinge assembly, and a power button;
- wherein:
- the operation portion is rotatably connected to the rotating portion by the hinge assembly;
- the hinge assembly comprises a first frame, a second frame, a first elastic member, and an elongated locking member;
- the first frame having an elongated portion, first and second ends perpendicular to the elongated portion, at least one first pin protruding from the first end, and at least one second pin protruding from the second end;
- the second frame having an elongated portion, first and second ends perpendicular to the elongated portion with respective first and second curved slots, wherein the at least one first pin protrudes through the first curved slot and the at least one second pin protrudes through the second curved slot;
- the second frame is rotatably coupled to the first frame by the at least one first pin, the at least one second pin, and the first and second curved slots, wherein the second frame is slidably adjustable between a first rotation position and a second rotation position to change a tilt angle of the second frame with respect to the first frame;
- the first elastic member is connected between the first frame and the second frame and presses the second frame toward the second rotation position;
- and
- the elongated locking member is movably coupled to the first frame to slide along the elongated portions of the first and second frames between a locking position, where the elongated locking member is engaged with the second frame to maintain the second frame at the first position, and an unlocking position, where the elongated locking member is separated from the second frame;
- the first end of the second frame comprises a catch step;
- a first end of the elongated locking member comprises a hook portion that protrudes toward the second frame, wherein the hook portion engages the catch step when the second frame is in the first position and the elongated locking member is in the locking position;
- the hook portion comprises a first inclined portion;
- the catch step comprises a second inclined portion
- that engages the first inclined portion when the second frame is moved from the second position to the first position to slide the elongated locking member in a direction toward the unlocking position;
- the power button is mechanically connected to the elongated locking member to transfer a button pressing force against the power button to the elongated locking member;
- and
- the elongated locking member slides from the locking position to the unlocking position when the power button receives the button pressing force.