Drive coupler for a replaceable unit of an electrophotographic image forming device

1. A replaceable unit for use in an electrophotographic image forming device, comprising:

a housing;

a rotatable component mounted on the housing; and

a drive coupler mounted on the housing and rotatable about a rotational axis, the drive coupler of the replaceable unit has a force receiving portion exposed on the housing to contact and receive rotational force from a corresponding drive coupler in the image forming device when the replaceable unit is installed in the image forming device, the drive coupler of the replaceable unit has a force transmitting portion operatively connected to the rotatable component for transferring rotational force received by the force receiving portion from the corresponding drive coupler in the image forming device to the rotatable component, the drive coupler of the replaceable unit includes a first component and a second component that is coaxial with the first component, the force receiving portion is positioned on the first component and the force transmitting portion is positioned on the second component, one of the first and second components includes a plurality of ribs that are spaced circumferentially around the rotational axis of the drive coupler of the replaceable unit and that are angled in an operative rotational direction of the drive coupler of the replaceable unit in a direction from the force receiving portion toward the force transmitting portion along the rotational axis of the drive coupler of the replaceable unit, the other of the first and second components includes a plurality of grooves that are spaced circumferentially around the rotational axis of the drive coupler of the replaceable unit and that are correspondingly angled in the operative rotational direction of the drive coupler of the replaceable unit in the direction from the force receiving portion toward the force transmitting portion along the rotational axis of the drive coupler of the replaceable unit, the plurality of grooves matably receive the plurality of ribs.

2. The replaceable unit of claim 1 , wherein the first component is positioned axially outward of the second component relative to the housing, and an inner axial end of the first component is mated with an outer axial end of the second component.

3. The replaceable unit of claim 1 , wherein the plurality of ribs and the plurality of grooves are angled helically in the operative rotational direction of the drive coupler of the replaceable unit in the direction from the force receiving portion toward the force transmitting portion along the rotational axis of the drive coupler of the replaceable unit.

4. The replaceable unit of claim 1 , wherein the second component includes a boss that extends axially from an axial end of the second component, the first component includes a slot that extends axially into an axial end of the first component and that matably receives the boss of the second component, one of the plurality of ribs and the plurality of grooves is positioned on an outer circumferential surface of the boss of the second component and the other of the plurality of ribs and the plurality of grooves is positioned on an inner circumferential surface of the slot of the first component.

5. The replaceable unit of claim 4 , wherein the plurality of ribs is positioned on the outer circumferential surface of the boss of the second component and the plurality of grooves is positioned on the inner circumferential surface of the slot of the first component.

6. The replaceable unit of claim 1 , wherein the first component and the second component of the drive coupler of the replaceable unit are joined by engagement between the plurality of ribs and the plurality of grooves without the use of a fastener joining the first component and the second component of the drive coupler of the replaceable unit.

7. The replaceable unit of claim 1 , wherein the force receiving portion includes a plurality of lugs that are positioned on an axial end of the first component and that are spaced circumferentially around the rotational axis of the drive coupler of the replaceable unit.

8. An interface drive coupler for a replaceable unit of an electrophotographic image forming device, comprising:

a first component;

a second component coaxial with the first component along a rotational axis of the interface drive coupler;

a force receiving portion positioned on the first component for receiving rotational force from a corresponding drive coupler in the image forming device; and

a force transmitting portion positioned on the second component for transferring rotational force received by the force receiving portion to a rotatable component of the replaceable unit,

wherein one of the first and second components includes a plurality of ribs that are spaced circumferentially around the rotational axis of the interface drive coupler and that are angled in an operative rotational direction of the interface drive coupler in a direction from the force receiving portion toward the force transmitting portion along the rotational axis of the interface drive coupler, the other of the first and second components includes a plurality of grooves that are spaced circumferentially around the rotational axis of the interface drive coupler and that are correspondingly angled in the operative rotational direction of the interface drive coupler in the direction from the force receiving portion toward the force transmitting portion along the rotational axis of the interface drive coupler, the plurality of grooves matably receive the plurality of ribs to prevent the first and second components from separating from each other.

9. The interface drive coupler of claim 8 , wherein the plurality of ribs and the plurality of grooves are angled helically in the operative rotational direction of the interface drive coupler in the direction from the force receiving portion toward the force transmitting portion along the rotational axis of the interface drive coupler.

10. The interface drive coupler of claim 8 , wherein the second component includes a boss that extends axially from an axial end of the second component, the first component includes a slot that extends axially into an axial end of the first component and that matably receives the boss of the second component, one of the plurality of ribs and the plurality of grooves is positioned on an outer circumferential surface of the boss of the second component and the other of the plurality of ribs and the plurality of grooves is positioned on an inner circumferential surface of the slot of the first component.

11. The interface drive coupler of claim 10 , wherein the plurality of ribs is positioned on the outer circumferential surface of the boss of the second component and the plurality of grooves is positioned on the inner circumferential surface of the slot of the first component.

12. The interface drive coupler of claim 8 , wherein the first component and the second component of the interface drive coupler are joined by engagement between the plurality of ribs and the plurality of grooves without the use of a fastener joining the first component and the second component of the interface drive coupler.

13. The interface drive coupler of claim 8 , wherein the force receiving portion includes a plurality of lugs that are positioned on an axial end of the first component and that are spaced circumferentially around the rotational axis of the interface drive coupler.

14. A replaceable unit for use in an electrophotographic image forming device, comprising:

a housing;

a rotatable component mounted on the housing; and

a drive coupler mounted on the housing and rotatable about a rotational axis, the drive coupler of the replaceable unit has a force receiving portion exposed on the housing to contact and receive rotational force from a corresponding drive coupler in the image forming device when the replaceable unit is installed in the image forming device, the drive coupler of the replaceable unit has a force transmitting portion operatively connected to the rotatable component for transferring rotational force received by the force receiving portion from the corresponding drive coupler in the image forming device to the rotatable component, the drive coupler of the replaceable unit includes a first component and a second component that is coaxial with the first component, the force receiving portion is positioned on the first component and the force transmitting portion is positioned on the second component, one of the first component and the second component includes a male connector and the other of the first component and the second component includes a female connector that matably receives the male connector, each of the male connector and the female connector includes a helical thread that extends circumferentially around the rotational axis of the drive coupler of the replaceable unit and that is angled in an operative rotational direction of the drive coupler of the replaceable unit in a direction from the force receiving portion toward the force transmitting portion along the rotational axis of the drive coupler of the replaceable unit, the helical thread of the male connector is engaged with the helical thread of the female connector joining the first component to the second component.

15. The replaceable unit of claim 14 , wherein the first component is positioned axially outward of the second component relative to the housing, and an inner axial end of the first component is mated with an outer axial end of the second component.

16. The replaceable unit of claim 14 , wherein the second component includes the male connector extending axially from an axial end of the second component, and the first component includes the female connector extending axially into an axial end of the first component.

17. The replaceable unit of claim 14 , wherein the first component and the second component of the drive coupler of the replaceable unit are joined by engagement between the helical threads of the male and female connectors without the use of a fastener joining the first component and the second component of the drive coupler of the replaceable unit.

18. The replaceable unit of claim 14 , wherein the force receiving portion includes a plurality of lugs that are positioned on an axial end of the first component and that are spaced circumferentially around the rotational axis of the drive coupler of the replaceable unit.