Biaxial hinge device and portable terminal device

A portable terminal device including a biaxial hinge portion comprising:

• a first housing;
• a second housing;
• an approximately barrel-shaped first shaft member making up a first rotational shaft;
• a first fixing portion which fixes said first shaft member to said first housing so as not to move rotationally;
• an approximately barrel-shaped second shaft member making up a second rotational shaft orthogonal to said first rotational shaft;
• a rotational connecting portion which connects said second shaft member to said first shaft member so as to move rotationally said second shaft member along said first rotational shaft made up of said first shaft member;
• a thrust cam member provided to said second shaft member so as to move in the extending direction of said second shaft member;
• a rotational arm member provided to said second shaft member so as to move rotationally along said second rotational shaft made up of said second shaft member;
• a second fixing portion which fixes said rotational arm member to said second housing;
• a contact protrusion provided to said thrust cam member so as to protrude to said first shaft member side at the time of said thrust cam member being provided to said second shaft member;
• a fitting protrusion provided to said thrust cam member so as to protrude to said rotational arm member side at the time of said thrust cam member being provided to said second shaft member;
• a fitting groove provided to said rotational arm member, into which said fitting protrusion provided to said thrust cam member is fitted at the time of said thrust cam member moving to said rotational arm member side;
• and
• a fitting/fitting-release control portion provided to said first shaft member which releases fitting of said fitting protrusion of said thrust cam member into said fitting groove of said rotational arm member in a case where the rotational angle of said second shaft member as to said first shaft member is a first rotational angle, and moves said thrust cam member to said rotational arm member side by way of said contact protrusion of said thrust cam member to fit said fitting protrusion of said thrust cam member into said fitting groove of said rotational arm member in a case where the rotational angle of said second shaft member as to said first shaft member is a second rotational angle.