Development device and image formation apparatus
AssigneeOki Data Corporation
InventorTakuya Kitta
Life of this patent
Estimating the term…
Abstract
A developer storage device includes a rotation member including a shaft portion protruding from a main body thereof; a support member formed with a hole by which the shaft portion is supported; and a first seal member disposed between the main body of the rotation member and the support member and including a hole into which the shaft portion is inserted. The support member includes a step portion. The step portion includes a first restraint section which restrains motion of the first seal member in an axial direction of the shaft portion, and a second restraint section which restrains motion of the outer periphery of the first seal member in a radial direction of the shaft portion.
Claims22
A developer storage device, comprising:
- a rotation member including a main body thereof and a shaft portion which protrudes from an end portion of the main body;
- a support member formed with a hole by which the shaft portion is supported;
- a first seal member disposed between the main body of the rotation member and the support member and including a hole into which the shaft portion is inserted;
- and
- a second seal member disposed between the first seal member and the main body of the rotation member and including a hole into which the shaft portion is inserted,
- wherein the support member includes a step portion including:
- a first restraint section configured to restrain motion of the first seal member in an axial direction of the shaft portion;
- and a second restraint section configured to restrain motion of the outer periphery of the first seal member in a radial direction of the shaft portion.
A developer storage device comprising:
- a rotation member including a main body thereof and a shaft portion which protrudes from an end portion of the main body;
- a support member formed with a hole by which the shaft portion is supported;
- and
- a first seal member disposed between the main body of the rotation member and the support member and including a hole into which the shaft portion is inserted,
- wherein
- the support member includes a step portion including:
- a first restraint section configured to restrain motion of the first seal member in an axial direction of the shaft portion;
- and a second restraint section configured to restrain motion of the outer periphery of the first seal member in a radial direction of the shaft portion,
- the second restraint section of the support member is formed in a ring shape surrounding the hole of the support member, and
- a diameter of the second restraint section is smaller than a diameter of the first seal member, so that the elasticity of the first seal member brings an inner circumference of the hole of the first seal member into close contact with an outer circumference of the shaft portion of the rotation member.
Dependencies are inferred from the claim text.