US 8,897,671 B2 · Image formation apparatus

Abstract

An image formation apparatus includes a driving source configured to supply a rotational driving force in a predetermined direction, a particular developing unit having a developing roller and accommodating particular color developer, a first gear configured to receive the driving force of the driving source, a second gear configured to transmit the driving force to the developing roller, a particular intermediate gear configured to be engaged with the first and the second gears. A rotational center of the particular intermediate gear is arranged on an upstream side in a moving direction of teeth of the second gear, and a translation member is configured to linearly move between a first position where the particular intermediate gear engages with the first and second gears, and a second position where the particular intermediate gear disengages from the particular intermediate gear.

Claims17

Dependent claims

An image formation apparatus, comprising:

a driving source configured to supply a rotational driving force in a predetermined direction;
a particular developing unit having a developing roller and accommodating particular color developer;
a first gear configured to receive the driving force of the driving source;
a second gear configured to transmit the driving force to the developing roller to provide rotation of the developing roller;
a particular intermediate gear configured to be engaged with the first gear and the second gear, a rotational center of the particular intermediate gear being arranged on an upstream side in a moving direction of teeth of the second gear on a line connecting a rotational center of the first gear and a rotational center of the second gear;
and
a translation member configured to linearly move between a first position at which the particular intermediate gear engages with both the first gear and the second gear and a second position at which the particular intermediate gear disengages from the second gear.

4 more elements

An image formation apparatus comprising:

a driving source configured to supply a rotational driving force in a predetermined direction;
a rotation member;
a first gear configured to be supplied with the driving force of the driving source;
a second gear configured to transmit the driving force to the rotation member to provide rotation of the rotation member;
a particular intermediate gear configured to be engaged with the first gear and the second gear, a rotational center of the particular intermediate gear being arranged on an upstream side in a moving direction of teeth of the second gear on a line connecting a rotational center of the first gear and a rotational center of the second gear;
and
a translation member configured to linearly move between a first position at which the particular intermediate gear engages with both the first gear and the second gear and a second position at which the particular intermediate gear disengages from the second gear.

4 more elements

Dependencies are inferred from the claim text.

Image formation apparatus

Life of this patent

Image formation apparatus

Life of this patent

Abstract

Claims17