Spindle motor, spindle motor assembly and image forming device having the same

摘要

There is provided a spindle motor (100) and a spindle motor assembly, and an image forming device having the same. The spindle motor (100) includes a shaft (130) rotatably coupled to a stator (120), a rotor (140) to rotate with the shaft (130), and a dynamic pressure generator (300) to generate a dynamic pressure to make the rotor (140) move axially toward the stator (120) by an ambient air flow generated during a rotation of the rotor (140).