Portable information terminal

A sliding-type portable information terminal comprising:

• a flat first casing;
• a flat second casing which is overlapped on said first casing;
• a sliding mechanism to maintain a portable state of said first casing and said second casing overlapped together;
• and
• a turning mechanism to change from said portable state to a usable state via a sliding state whereby said first casing and said second casing mutually slide;
• said sliding mechanism formed with
• a first sliding mechanism having
• a sliding groove formed in the sliding direction in the first casing;
• a first sliding supporting member formed to slide within the sliding groove without disengaging from the sliding groove;
• and
• a sliding shaft member to axially support an inverse sliding groove side on the first sliding supporting member with the second casing;
• and
• a second sliding mechanism having
• a backside sliding groove formed in the sliding direction on the second casing;
• a second sliding supporting member formed to slide within the backside sliding groove without disengaging from the backside sliding groove;
• and
• a sliding shaft member to axially support the inverse sliding backside groove side on the second sliding supporting member on the first casing;
• said turning mechanism having
• a first turning control shaft member to axially support the second casing side on said first sliding supporting member with the first casing;
• and
• a second turning control shaft member to axially support the first casing side on said second sliding supporting member with the second casing;
• wherein the first turning control shaft member and the second turning control shaft member have a turning angle control mechanism wherein turning is stopped at a angle formed by the face on the opposite side of the face of the second casing side of the first casing and the first casing side of the second casing forming a single face when the portable information terminal is in a usable state.