Biaxial hinge device and portable terminal device

摘要

A biaxial hinge device includes: a first-shaft member; a second-shaft member orthogonal to the first-shaft member; a thrust-cam member provided to the second-shaft member so as to move in the extending direction of the second-shaft member; a rotational-arm member provided to the second-shaft member so as to move rotationally; a protrusion provided to the thrust-cam member so as to protrude to the rotational-arm member side; a groove provided to the rotational-arm member, into which the protrusion is fitted; and an fitting/fitting-release control portion provided to the first-shaft member which releases fitting of the protrusion into the groove when the rotational angle of the second-shaft member as to the first-shaft member is a first-rotational angle, and moves the thrust-cam member to the rotational-arm member side to fit the protrusion into the groove when the rotational angle of the second-shaft member as to the first-shaft member is a second-rotational angle.