Primax Electronics Ltd.

Heng-Tseng Liao

Chun-Che Wu

Sheng-An Tsai

Li-Kuei Cheng

Chien-Pang Chien

Tsung-Wen Hsueh

Kai-Wen Lee

A roller module includes a wheel disc, a magnetic conductor and an electro-permanent magnet assembly. The wheel disc is rotatable along a rotation axis line. The magnetic conductor is coaxially arranged and synchronously rotated with the wheel disc. The magnetic conductor includes a hub and plural spokes. The plural spokes are radially extended from the hub. The magnetic conductor is arranged between the wheel disc and the electro-permanent magnet assembly. When the electro-permanent magnet assembly is operated in the first operating status, the electro-permanent magnet assembly provides a first magnetic attraction force to at least one spoke in the axial direction. When the electro-permanent magnet assembly is operated in the second operating status, the electro-permanent magnet assembly provides a second magnetic attraction force to at least one spoke in the axial direction. The first magnetic attraction force is greater than the second magnetic attraction force.

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Taipei, Taiwan

Heng-Tseng Liao