US 6,188,858 B1 · Roller driving apparatus of printer

Abstract

A roller driving apparatus having a roller contacting and rotating a photo-receptor web in a printer is provided. The apparatus includes a support shaft coaxially fixed to the roller and having a coupling groove formed in an outer circumferential surface thereof in a radial direction, a rotation member inserted around the support shaft, a coupling member coupled to the rotation member to protrude and retreat with respect to an inner circumferential surface of the rotation member, and inserted in the groove of the support shaft when protruding from the inner circumferential surface of the rotation member; a spring elastically biasing the coupling member in a direction to protrude from the inner circumferential surface of the rotation member, a motor, and a power transfer unit transferring the power from the motor to the rotation member to rotate the rotation member.

Claims20

Dependent claims

A roller driving apparatus in a printer, comprising:

a supporting shaft coaxially fixed to a roller, having a coupling groove formed on said supporting shaft;
a rotation member connected to a motor rotating by said motor, having a coupling hole accommodating said supporting shaft;
a coupling member elastically connected to said rotation member, moving radially and coupling said coupling member to said supporting shaft by receiving said coupling member into said groove;
and
a spring elastically connecting said coupling member to said rotation member.

2 more elements

Dependencies are inferred from the claim text.

Roller driving apparatus of printer

Life of this patent

Roller driving apparatus of printer

Life of this patent

Abstract

Claims20