Patent ID: 8413303

Claim:
A hinge mechanism comprising: a rotation shaft provided to an openable and closable body; a bracket having a rotation shaft portion insertion hole receiving a rotation shaft portion of the rotation shaft and having at least one concave engaging section on a circumference centered on the rotation shaft portion insertion hole; a plate having a mounting shaft portion insertion hole receiving a mounting shaft portion formed on an end face of the rotation shaft portion; and a leaf spring having a mounting shaft portion insertion hole receiving the mounting shaft portion and also having a convex engaging section for engaging the at least one concave engaging section of the bracket to hold the openable and closable body at a predetermined rotation angle position, the leaf spring being located between the bracket and the plate, wherein the mounting shaft portion insertion hole of the plate is formed larger than the mounting shaft portion insertion hole of the leaf spring, such that the leaf spring is crimped and fixed to the end face of the rotation shaft portion by an outer wall side part of the mounting shaft portion that is collapsed, due to an end face of the mounting shaft portion being crimped, into a gap formed between the mounting shaft portion and the mounting shaft portion insertion hole of the plate.