Biaxial hinge device and portable terminal device

A portable terminal device comprising:

• a first housing;
• a second housing;
• a biaxial hinge device including a rotational shaft, by which the first housing and the second housing are connected so as to enable opening in a longitudinal direction and a lateral direction, such that the first housing and second housing can be approximately orthogonal to one another, the biaxial hinge device further including
• an approximately rod-shaped first shaft member,
• an approximately rod-shaped second shaft member,
• a shaft connecting member for connecting the first shaft member and the second shaft member such that the direction in which the first shaft member extends and the direction in which the second shaft member extends are approximately orthogonal,
• an arm portion provided to the first shaft member so as to be turnable along the outer circumference of the first shaft member, the arm portion further including
• a fixing portion for fixation to the first housing, and
• a fitting recess provided along the direction in which the first shaft member extends;
• a hinge fixing portion for fixation to the second housing, provided to the second shaft member so as to be turnable along the outer circumference of the second shaft member;
• a thrust cam member provided to the first shaft member such that movement in the direction in which the first shaft member extends is enabled, the thrust cam member further including
• a fitting protrusion, provided at the end portion thereof toward the arm portion, for fitting into the fitting recess of the arm portion;
• a spring member configured to press the thrust cam member in the direction of the second shaft member;
• and
• a thrust cam motion control member including
• a first contact face portion, for moving the thrust cam member in the direction of the shaft connecting member;
• and
• a second contact face portion, for moving the thrust cam member in the direction of the arm portion,
• motion taking place by the first contact face portion and the second contact face portion directly or indirectly coming into contact with the thrust cam member;
• wherein, in the event that the first housing and the second housing are in a closed state, the thrust cam member is moved in the direction of the shaft connecting member according to pressing force by the spring member with the first contact face portion, and the fitting protrusion of the thrust cam member and the fitting recess of the arm portion are disengaged from fitting, whereby each housing can turn supported by the first shaft member as a rotational shaft and together each housing can turn supported by the second shaft member as a rotational shaft, and in a case of turning supported by the second shaft member as a rotational shaft, the thrust cam member is moved in the direction of the arm portion so as to press against the pressing force of the spring member, whereby the fitting protrusion of the thrust cam member is fitted into the fitting recesses of the arm portion, and the turning angle of each housing supported by the second shaft member as a rotational shaft is restricted to a predetermined turning angle.