Hinge device and housing

A hinge device that supports a first member and a second member so as to allow the first and second members to be rotatable, the hinge device comprising:

• a first guide groove and a second guide groove formed on the first member;
• a first pin provided on the second member and is slidably engaged with the first guide groove;
• and
• a second pin provided on the second member and is slidably engaged with the second guide groove, wherein
• the first guide groove and the second guide groove respectively include a first linear groove portion and a second linear groove portion substantially parallel to each other in a first direction,
• the first guide groove includes a first end portion being continuous from the first linear groove portion and extending in a second direction relative to the first direction, wherein the first pin rotatably comes into contact with the first end portion, and
• the second guide groove includes a second end portion being continuous from the second linear groove portion and extending substantially parallel to the second direction, wherein the second end portion includes a movement space in which the second pin rotates about the first pin disposed at the first end portion of the first guide groove, and
• the first and second linear groove portions having respective longitudal axes that gradually approach toward each other from a side corresponding to the first and second end portions.