Cover device

A cover device comprising:

• a first body;
• and
• a second body comprising a first plate, a second plate and a third plate, wherein the first plate is rotatably connected to the first body, wherein second plate is rotatably connected to the first plate, wherein the third plate is rotatably connected to the second plate;
• wherein a first region of the first body comprises a first magnetic material, a second region of the first body comprises a second magnetic material, and a third region of the third plate comprises a third magnetic material, allowing the third region of the third plate to attach to either the first region or the second region of the first body,
• wherein, when the third region of the third plate is attached to an outer surface of either the first region or the second region of the first body, the first plate, the second plate and the first body form and maintain a first triangular pillar,
• wherein, when the third region of the third plate is attached to the outer surface of either the first region or the second region of the first body, at least a part of the first plate constitutes at least a part of a first side wall of the first triangular pillar, at least a part of the second plate constitutes at least a part of a second side wall of the first triangular pillar and at least a part of the first body constitutes at least a part of a third side wall of the first triangular pillar,
• wherein, as the third region of the third plate moves from being attached to the outer surface of the first region of the first body to being attached to the outer surface of the second region of the first body, an angle between the first side wall and the third side wall of the first triangular pillar changes, thereby changing the angle between the first plate and the first body.