Spinning knob

A spinning knob, including:

• a shell;
• a rotation member, defining an axial direction, the rotation member being rotatably disposed on the shell along the axial direction, the rotation member including at least one threaded portion, the at least one threaded portion being adapted for screwing with a screw;
• a pushing member, arranged on the shell, the pushing member tending to abut against the rotation member along a radial direction to have circumferential interference with the rotation member so that the shell and the rotation member may rotate simultaneously;
• wherein the rotation member abuts against the pushing member along a direction oblique to the radial direction to make the pushing member trip away from the rotation member so that the pushing member has no circumferential interference with the rotation member and that the shell is rotatable with respect to the rotation member when the rotation member is screwed to the screw sufficiently, an end of the rotation member abuts against an object, and the shell is further rotated;
• wherein the rotation member has at least one restriction member disposed on the rotation member slidably along a radial direction, the at least one restriction member is movable between a screwing position and a release position, the at least one restriction member has the at least one threaded portion, one of elastic members is disposed on one of the rotation member and the shell to push the at least one restriction member so that the at least one restriction member tends to move toward the screwing position to make the at least one threaded portion abut against and screw with the screw, the at least one threaded portion does not abut against and screw with the screw when the at least one restriction member moves toward the release position.