公开(公告)号：US20230324844A1

公开(公告)日：2023-10-12

申请号：US18024492

申请日：2020-09-28

Applicant: Hewlett-Packard Development Company, L.P.

Inventor： Elizabeth A. SWANSON ,  Gabriel S. MCDANIEL ,  Jeffrey H. LUKE

IPC: G03G21/16

CPC classification number: G03G21/1647 ,  G03G21/1676 ,  G03G2221/1657

Abstract: An image forming apparatus includes a development cartridge having a developing roller. A coupler for the image forming apparatus includes a shaft and a coupling structure to rotate the developing roller. The coupling structure is disposed at an end part of the shaft, is movable along an axial direction of the shaft and coupleable with another coupling structure of a print engine of the image forming apparatus. The coupling structure includes a body, a magnet disposed in the body to cause the coupling structure to be attracted to the another coupling structure so that the coupling structure is aligned with the another coupling structure, and a plurality of protrusions which protrude from the body in the axial direction to engage with the another coupling structure, the plurality of protrusions having at least one side with an inclined face.

公开(公告)号：US20230077968A1

公开(公告)日：2023-03-16

申请号：US17792179

申请日：2020-04-24

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Gabriel S. MCDANIEL ,  Justin PETTINGILL ,  Jeffrey H. LUKE

IPC: G03G21/16 ,  G03G15/08

Abstract: An image forming apparatus includes a development cartridge having a developing roller. The developing roller includes a roller body, and a shaft to pass through a central axis of the roller body. A coupling structure is disposed at an end part of the shaft, is movable from a first position to a second position, and includes a first coupling piece and a second coupling piece. Positions of the first coupling piece and the second coupling piece are maintained with respect to one another by a static frictional force between surfaces of the first coupling piece and the second coupling piece to hold the coupling structure in the first position. When a predetermined force overcomes the static frictional force, the first coupling piece and the second coupling piece disengage from one another to allow the coupling structure to move from the first position to the second position.