Portable electronic device and slide rail device

A portable electronic device, comprising:

• a computer body, having a first side edge;
• a display, having a second side edge, a display surface and a back side surface opposite to the display surface;
• a support member, having one end rotatably connected to the first side edge and the other end rotatably connected to the back side surface;
• and
• a slide rail structure, disposed in the computer body, the slide rail structure comprising:
• a sliding element, slidable between a first position and a second position, wherein the sliding element has a first combining portion;
• and
• a connecting arm, rotatably connected to the second side edge of the display, wherein the connecting arm has a second combining portion, and the second combining portion is connected to the first combining portion,
• wherein when a comprised angle between the display surface and the computer body is a first angle, the sliding element is in the first position, and when the comprised angle between the display surface and the computer body is rotated from the first angle to a second angle greater than the first angle, the connecting arm pulls the sliding element to the second position, and
• wherein the sliding element has two guide slots parallel to each other, the computer body has two limiting members, and the two limiting members pass through the two guide slots and limit the sliding of the sliding element between the first position and the second position.