Abstract: A screw-free release mechanism comprises a first article disposed with an elastic arm and a first guide unit in which the elastic arm is coupled to a first end of a releasing arm. A second end of the releasing arm is disposed with a buckling unit and the first guide unit guides a moving direction of the releasing arm. When the releasing arm is moved toward a first direction thereof, the elastic arm will be caused to deform to generate an elastic force pushing the releasing arm to move toward a second direction thereof; entire components of the releasing mechanism are few, the structure is simple, and the releasing arm can then be allowed to assemble conveniently onto an article without needing screws. Whereby, the assembly efficiency and the production yield factor of the release mechanism can be elevated so as to reduce the production cost.

Abstract: A knob structure is disposed on an electronic device to input a preset control signal. The knob structure includes a rotary encoder, a brake wheel, and a rotary wheel. A plurality of ratchets is disposed around the circumference of the brake wheel and locked on the rotary encoder. The rotary wheel is rotatably disposed on the body case of the electronic device and is nested on the brake wheel correspondingly. A block is disposed on the rotary wheel to be embedded between the ratchets, so as to control the rotation of the rotary wheel to generate a preset control signal by causing the brake wheel to drive the rotary encoder to rotate. The rotary wheel and the brake wheel are engaged non-fixedly, so as to prevent the rotary wheel and the body case of the electronic device from interfering with each other.

Abstract: A stroller comprises a wheeled carriage frame, a pair of hollow upwardly inclining rear frame supports mounted to the wheeled carriage frame, and a pair of hollow connecting pieces telescopically connected to the rear frame supports. A substantially U-shaped handle has a pair of arm portions rotatably connected to the connecting pieces. The U-shaped handle can thus be rotated relative to the rear frame supports. The telescopic connection between the connecting pieces and the rear frame supports allow the adjustment of the height of the U-shaped handle. The rear frame supports are movable between two positions on a pair of arm rests of the stroller. Each of the rear frame supports has a movable hook body attached thereto to selectively lock the rear frame support against one of the arm rests at one of the two locking positions.