Carriage, liquid ejection head, printer, head inserting method and head positioning method
AssigneeCanon Kabushiki Kaisha
InventorsYukuo Yamaguchi, Shinya Asano
Life of this patent
Estimating the term…
Abstract
A carriage for carrying a liquid ejecting head unit for effecting printing by ejecting droplets through a plurality of ejection outlets includes, a supporting mechanism for supporting the liquid ejecting head unit for rotation about a predetermined portion; and an angle adjusting mechanism for adjusting an angular position of the liquid ejecting head unit supported by the supporting mechanism.
Claims13
A liquid ejection head unit for being rotatably and removably carried on a carriage, said head unit comprising:
- a liquid ejection head for ejecting liquid droplets through a plurality of ejection outlets formed in an ejection side surface thereof to effect printing on a printing medium;
- a casing for casing said liquid ejection head;
- a guiding shaft member provided on a bottom surface of said casing at a predetermined position;
- and
- a projection having a curved surface provided on a side of said casing extending along an extension of an axis of said guiding shaft member,
- wherein said guiding shaft member and said projection are engageable with predetermined portions of said carriage and provide a substantial center of rotation for such rotation of said ejection head that said ejection side surface of said ejection head moves in directions along said ejection side surface.
A liquid ejection head unit for being rotatably and removably carried on a carriage, said head unit comprising:
- a liquid ejection head for ejecting liquid droplets through a plurality of ejection outlets formed in an ejection side surface thereof to effect printing on a printing medium;
- a casing for casing said liquid ejection head;
- a guiding shaft member provided on a bottom surface of said casing at a predetermined position;
- a projection having a curved surface provided on a side of said casing extending along an extension of an axis of said guiding shaft member;
- and
- a positioning portion, provided on a side of said casing, for positioning said ejection head unit in a direction of a rotation thereof;
- said carriage including:
- a supporting mechanism for rotatably supporting said liquid ejection head unit, said supporting mechanism for being engageable with said guiding shaft member and said projection of said liquid ejection head unit to provide a substantial center of rotation of said liquid ejection head unit;
- a cam member having an outer peripheral cam surface rotatably contactable with said positioning portion of said liquid ejection head unit;
- and
- an angle adjusting mechanism for adjusting an angle of rotation of said cam member including a drum member rotatable in interrelation with said cam member and having a plurality of grooves on an outer peripheral surface of said drum member, and a locking member, slidable on said outer peripheral surface of said drum member, for locking said drum member by engagement with said grooves so as to prevent rotation of said drum member,
- wherein said angle adjusting mechanism rotates said cam member contacted to said positioning portion by said drum member to move said liquid ejection head unit carried on said carriage along said ejection side surface.
Dependencies are inferred from the claim text.