Patent ID: 8371486

Claim:
A holder for a portable device comprising: a case body that is formed of an upper case and a lower case, each having a side wall to define a perimeter and having two communication holes in the side wall of the upper and lower case, the two communication holes communicating an inside and an outside; a strap that is ring-shaped, that passes through the two communication holes of the case body, and that encloses the side wall of the case body between the two communication holes; a drum that is contained in the case body, that is rotatably provided to the case body, that has the strap attached thereto, and that winds up the strap; a drive spring that is attached to an inside of the drum, and that applies bias in a winding-up direction of the drum; and a slope member that slants from an outside surface of any one of the upper case and the lower case toward the other one of the upper case and the lower case, and that extends from a center portion of the side wall located between the two communication holes of said one of the upper case and lower case, wherein the slope member located between the two communication holes of the case body is formed in a continuous curve.