Support apparatus

A support apparatus, comprising:

• a stylus fastener configured to fasten a stylus, wherein a magnet of the stylus comprises a first wall surface and a second wall surface facing away from the first wall surface, and a polarity of the first wall surface is opposite to that of the second wall surface,
• wherein the stylus fastener comprises an annular body and a mounting space formed by the annular body,
• wherein the annular body comprises:
• an inner wall surface that faces the mounting space;
• an outer wall surface that faces away from the inner wall surface;
• and
• a plurality of magnets disposed around an X axis to enclose the annular body, wherein a direction of magnetic lines of the annular body is from the inner wall surface to the outer wall surface or from the outer wall surface to the inner wall surface,
• wherein the inner wall surface has a first polarity, the outer wall surface has a second polarity, and the first polarity is opposite to the second polarity,
• wherein the mounting space is configured to receive the stylus in an X-axis direction, such that the stylus fastener is sleeved onto a periphery of the stylus, and the X-axis direction is a length direction of the support apparatus,
• wherein both the first wall surface and the second wall surface of the stylus are disposed opposite to the inner wall surface when the mounting space receives the stylus, and
• wherein a first magnetic force is generated between the first wall surface and the inner wall surface, a second magnetic force is generated between the second wall surface and the inner wall surface, and the first magnetic force and the second magnetic force have a difference, such that the stylus can be magnetically fastened to the stylus fastener by the magnet of the stylus.