Light scanning apparatus and image forming apparatus

An image forming apparatus, comprising:

• a photosensitive member;
• a light scanning apparatus configured to emit a light beam so that the light beam scans the photosensitive member to form an electrostatic latent image on the photosensitive member;
• a developing unit configured to develop the electrostatic latent image formed by the light scanning apparatus to form a toner image;
• and
• a transfer unit configured to transfer the toner image formed by the developing unit onto a recording medium,
• the light scanning apparatus including:
• a light source configured to emit the light beam;
• a deflector configured to deflect the light beam emitted from the light source;
• an optical member configured to guide the deflected light beam to the photosensitive member;
• an optical box, which the light source is mounted to, configured to hold the deflector and the optical member in an inside of the optical box;
• and
• a cover configured to cover an opening of the optical box,
• the optical box including:
• a concave-shaped cut-away portion formed from a top portion of a side wall of the optical box toward a bottom portion of the optical box;
• and
• a connecting wall which stands from the bottom portion of the optical box and is bent and branched from the concave-shaped cut-away portion of the side wall to the inside of the optical box so as to cross over the concave-shaped cut-away portion,
• the cover including a dustproof member provided on the cover to dustproof the inside of the optical box, the dustproof member being sandwiched between the cover and the side wall and between the cover and the connecting wall which a cable configured to connect a member arranged inside the optical box and a member arranged outside the optical box passes when the cover is mounted on the optical box,
• wherein a height of a distal end of the connecting wall, which the cable passes, from the bottom portion is larger than a height of a base portion of the concave-shaped cut-away portion from the bottom portion.

A light scanning apparatus, comprising:

• a light source configured to emit a light beam;
• a deflector configured to deflect the light beam emitted from the light source;
• a driving motor configured to drive the deflector;
• an optical member configured to guide the deflected light beam to a photosensitive member;
• an optical box, which the light source is mounted to, configured to hold the deflector, the optical member, and the driving motor in an inside of the optical box;
• a signal wire configured to electrically connect an outside of the optical box with the driving motor in the inside of the optical box in order to send a signal for driving the driving motor from an exterior of the optical box to the driving motor;
• a cover mounted to the optical box to close an opening of the optical box;
• and
• a seal member molded, on the cover, from a material which is elastically deformable compared with the cover, the seal member being elastically deformed by intervening between the optical box and the cover in order to fill a space between the optical box and the cover mounted to the optical box, the signal wire being pressed toward the optical box by an elastic force generated by an elastic deformation of the seal member so that the signal wire is sandwiched between the seal member and the optical box.

An image forming apparatus, comprising:

• a photosensitive member;
• a light scanning apparatus configured to emit a light beam so that the light beam scans the photosensitive member to form an electrostatic latent image on the photosensitive member;
• a developing unit configured to develop the electrostatic latent image formed by the light scanning apparatus to form a toner image;
• and
• a transfer unit configured to transfer the toner image formed by the developing unit onto a recording medium,
• the light scanning apparatus including:
• a light source configured to emit a light beam;
• a deflector configured to deflect the light beam emitted from the light source;
• a driving motor configured to drive the deflector;
• an optical member configured to guide the deflected light beam to the photosensitive member;
• an optical box, which the light source is mounted to, configured to hold the deflector, the optical member, and the driving motor in an inside of the optical box;
• a signal wire configured to electrically connect an outside of the optical box with the driving motor in the inside of the optical box in order to send a signal for driving the driving motor from an exterior of the optical box to the driving motor;
• a cover mounted to the optical box to close an opening of the optical box;
• and
• a seal member molded, on the cover, from a material which is elastically deformable compared with the cover, the seal member being elastically deformed by intervening between the optical box and the cover in order to fill a space between the optical box and the cover mounted to the optical box, the signal wire being pressed toward the optical box by an elastic force generated by an elastic deformation of the seal member so that the signal wire is sandwiched between the seal member and the optical box.