Patent ID: 8928719
Filing Date: 2015-01-06
Classification: B41J,G02B,G03G

Abstract:
1. An optical scanning apparatus comprising: an optical box for accommodating a deflecting device for deflecting a laser beam emergent from a light source, and for accommodating an optical portion member for directing the laser beam to photosensitive member; a cap mounted to a top surface of a side wall of the optical box; and a sealing member molded on the cap, the sealing member being made of a material which is different from that of the cap and which is more easily deformed than the cap; wherein in a state that the cap is fixed to the top surface of the side wall of the optical box, the sealing member extends between an inside surface of the side wall of the optical box and a central portion of the cap, at positions spaced apart from a contact portion at which the cap contacts the top surface of the side wall of the optical box, and wherein the sealing member flexes, when the cap is mounted to the top surface of the side wall of the optical box, between a free end portion and a base portion at which the sealing member flexes so that the free end portion faces toward the cap, and wherein in a state that cap is fixed to the top surface of the side wall of the optical box, the sealing member contacts the inside surface of the side wall which does not face the cap in a state that sealing member flexes with the free end portion facing toward the cap.