Patent ID: 7712187

Claim:
A hinge assembly, comprising: a support member having a base and two first sidewalls located at opposite edges of the base of the support member, the base having an inner surface and an end surface connected with the inner surface, the end surface located at an edge connecting the opposite edges of the base, and a pivoting hole located at a side of the inner surface and the end surface, an extending direction of the pivoting hole being parallel with the inner surface and the end surface; a rotational base; a pivot mechanism for rotatably connecting the rotational base to the support member, the pivot mechanism comprising: a pivotal shaft with a shaft portion running through the pivoting hole of the support member so that the pivotal shaft being non-rotatable relative to the support member; a limiting washer with a first restricting surface and a second restricting surface, the limiting washer being non-rotatable relative to the rotational base, the first restricting surface and the second restricting surface configured for resisting the inner surface of the support member and the end surface of the support member respectively so that the rotational base is rotatable relative to the support member between a first utmost position and a second utmost position; and a fixing element, fixed on the pivotal shaft to prevent the limiting washer from disengaging from the pivotal shaft.