Slide rotation device, slide rotation method, and portable terminal device

A slide rotation method comprising:

• providing a rail portion along a sliding direction of an upper case;
• forming a slide mechanism that has a slide assistance plate sliding the upper case along the rail portion of the upper case;
• and
• providing a rotation mechanism that is fixed to a vicinity of one end portion of a lower case and rotatably supports the slide assistance plate using a rotation shaft positioned in an extending direction of the slide assistance plate,
• wherein in an opening operation, a force in an opening slide direction is exerted on the upper case in a state where the upper case and the lower case overlap each other to slide the upper case in the opening slide direction via the rail portion and the slide assistance plate, and one end portion of the upper case comes in contact with the slide assistance plate, and, in this state, a force in the opening slide direction is exerted on the upper case to rotate the slide assistance plate in an opening rotation direction using the rotation mechanism such that the upper case stands at a predetermined rotation angle with respect to the lower case via the slide assistance plate, and
• wherein in a closing operation, a force in a closing rotation direction reverse to the opening rotation direction is exerted on the upper case to put the upper case, which stands at a predetermined rotation angle with respect to the lower case, to be substantially parallel to the lower case using the rotation mechanism, and, in this state, a force in a closing slide direction reverse to the opening slide direction is exerted on the upper case to slide the upper case in the closing slide direction via the rail portion and the slide assistance plate such that the upper case and the lower case overlap each other, wherein
• the rotation mechanism comprises:
• an arm connection member that is fixed to the slide assistance plate;
• a first arm that is rotatably connected to the arm connection member and the lower case;
• and
• a second arm that has an overall-length greater than an overall-length of the first arm by a predetermined length and is rotatably connected to the arm connection member and the lower case,
• wherein in the opening operation, when a force in the opening slide direction is exerted on the upper case in a state where one end portion of the upper case comes in contact with the slide assistance plate, the first arm and the second arm are rotated in the opening rotation direction by the arm connection member fixed to the slide assistance plate to rotate the slide assistance plate in the opening rotation direction such that the upper case stands at a predetermined rotation angle with respect to the lower case via the slide assistance plate, and
• wherein in the closing operation, when a force in a closing rotation direction reverse to the opening rotation direction is exerted on the upper case, the first arm and the second arm are rotated in the closing rotation direction by the arm connection member fixed to the slide assistance plate to rotate the slide assistance plate in the closing rotation direction such that the upper case standing at a predetermined rotation angle with respect to the lower case is put to be substantially parallel to the lower case, and, in this state, a force in a closing slide direction reverse to the opening slide direction is exerted on the upper case to slide the upper case in the closing slide direction via the rail portion and the slide assistance plate such that the upper case and the lower case overlap each other.

A portable terminal device comprising:

• a rail portion that is provided along a sliding direction of an upper case;
• a slide mechanism that has a slide assistance plate sliding the upper case along the rail portion of the upper case;
• and
• a rotation mechanism that is provided to be fixed to a vicinity of one end portion of a lower case and rotatably supports the slide assistance plate using a rotation shaft positioned in an extending direction of the slide assistance plate,
• wherein in an opening operation, a force in an opening slide direction is exerted on the upper case in a state where the upper case and the lower case overlap each other so as to slide the upper case in the opening slide direction via the rail portion and the slide assistance plate, and one end portion of the upper case comes in contact with the slide assistance plate, and, in this state, a force in the opening slide direction is exerted on the upper case to rotate the slide assistance plate in an opening rotation direction using the rotation mechanism, and thereby the upper case stands at a predetermined rotation angle with respect to the lower case via the slide assistance plate, and
• wherein in a closing operation, a force in a closing rotation direction reverse to the opening rotation direction is exerted on the upper case to put the upper case, which stands at a predetermined rotation angle with respect to the lower case, to be substantially parallel to the lower case using the rotation mechanism, and, in this state, a force in a closing slide direction reverse to the opening slide direction is exerted on the upper case to slide the upper case in the closing slide direction via the rail portion and the slide assistance plate, and thereby the upper case and the lower case overlap each other, wherein
• the rotation mechanism comprises:
• an arm connection member that is fixed to the slide assistance plate;
• a first arm that is rotatably connected to the arm connection member and the lower case;
• and
• a second arm that has an overall-length greater than an overall-length of the first arm by a predetermined length and is rotatably connected to the arm connection member and the lower case.