Electronic apparatus and slide mechanism

An electronic apparatus comprising:

• a chassis having a display;
• an optical device in the chassis;
• a slider that is movable between a first position and a second position relative to the chassis;
• a shield cover in the slider, the shield cover being located to cover a front of the optical device when the slider is in the first position and located to be away from the front of the optical device when the slider is in the second position;
• a movable magnet at the slider;
• and
• a fixed magnet at the chassis,
• the fixed magnet having two fixed rows of fixed N poles and fixed S poles, a total of four poles of fixed N poles and fixed S poles in each of the fixed rows, the fixed N poles and the fixed S poles being alternately disposed in each of the fixed rows in a moving direction of the slider, and a lower row of the two fixed rows is directly opposing the movable magnet,
• the movable magnet having two movable rows of a movable N pole and a movable S pole, a total of two poles of one movable N pole and one movable S pole in each of the movable rows disposed in the moving direction, and an upper row of the two movable rows is directly opposing the fixed magnet, the movable N pole and the movable S pole of the upper row of the two movable rows being disposed in order to attract to the fixed magnet when the slider is in the first position and the second position,
• two fixed end poles of the fixed magnet at both ends of the lower fixed row each have a width L21, in the moving direction,
• two fixed central poles between the two fixed end poles of the lower fixed row each have a width L22, in the moving direction,
• the movable N pole and the movable S pole of the upper row each have a width L10, in the moving direction,
• wherein L22>L10>L21,
• wherein, when the movable magnet is in a first position along the moving direction and a left outermost edge of the movable magnet aligns with a left outermost edge of the fixed magnet, one fixed end pole and one fixed central pole of the fixed magnet biases the movable N pole and the movable S pole of the moving magnet in a left direction and not a right direction along the moving direction,
• wherein, when the movable magnet is in a second position along the moving direction and a right outermost edge of the movable magnet aligns with a right outermost edge of the fixed magnet, another fixed end pole and another fixed central pole of the fixed magnet biases the movable N pole and the movable S pole of the moving magnet in the right direction and not the left direction along the moving direction.