US 12,393,157 B2
Rotational force transmission structure
Seungchan Park, Suwon (KR); Junhui Kim, Suwon (KR); and Youngkwang Shin, Suwon (KR)
Assigned to Hewlett-Packard Development Company, L.P., Spring, TX (US)
Appl. No. 18/685,890
Filed by Hewlett-Packard Development Company, L.P., Spring, TX (US)
PCT Filed Jan. 5, 2022, PCT No. PCT/US2022/070030
§ 371(c)(1), (2) Date Feb. 22, 2024,
PCT Pub. No. WO2023/034654, PCT Pub. Date Mar. 9, 2023.
Claims priority of application No. 10-2021-0116309 (KR), filed on Sep. 1, 2021.
Prior Publication US 2025/0181023 A1, Jun. 5, 2025
Int. Cl. G03G 15/00 (2006.01); G03G 21/16 (2006.01); G03G 21/18 (2006.01)
CPC G03G 21/1647 (2013.01) [G03G 15/757 (2013.01); G03G 21/186 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A cartridge unit detachable from a main body of an image forming device, the cartridge unit comprising:
a rotation member;
a driven coupler arranged at an end portion of the rotation member in an axial direction of the rotation member; and
a coil spring arranged to be expandable and compressible in the axial direction of the rotation member, wherein a first end portion of the coil spring is fixed onto the driven coupler, the coil spring being wound from the first end portion toward a second end portion of the coil spring in a first direction,
wherein, when a rotational force is transmitted from an outside of the cartridge unit to the second end portion of the coil spring in the first direction or in a second direction opposite to the first direction, a portion of the transmitted rotational force is converted into a force that decreases or increases a diameter of the coil spring, and the first end portion of the coil spring presses the driven coupler in a direction perpendicular to the axial direction of the rotation member.