Hewlett-packard Development Company, L.p.

S-printing Solution Co., Ltd.

Youngkwang Shin

Seungchan Park

Dong-Uk Kim

Yong-sung Kim

Junhui Kim

Yoshitaka Isogai

Minwoo Kang

Jeong-Sup Sim

Myeongdong Kim

Jungho Roh

Seung-Chan Park

Donguk Kim

A cartridge unit detachable from a main body of an image forming device includes: a rotation member; a driven coupler arranged at one 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, a first end portion of the coil spring being fixed onto the driven coupler, and the coil spring being wound in a first direction from the first end portion toward a second end portion. When a rotational force is transmitted 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.

Rotational force transmission structure

Toner cartridge

In some examples, a developing device includes a developing container including an opening and to store a developer, a developing sleeve installed in the developing container and partially exposed to an outside of the developing container through the opening, a regulation member upstream of the opening in a rotation direction of the developing sleeve and to regulate an amount of the developer adhered to the developing sleeve and supplied to the opening, and a magnetic member inside the developing sleeve. The magnetic member includes a main pole facing the opening, a regulation pole facing the regulation member, and a catch pole upstream of the regulation pole in the rotation direction of the developing sleeve. The magnetic member is to cause adhesion of the developer in the developing container to the developing sleeve. At least one of lengths of the catch pole or the regulation pole and diameters of both end portions of the catch pole or the regulation pole are less than a length and a diameter, respectively, of the main pole.

Developing device with magnetic member having plurality of magnetic poles

A developer cartridge including a housing to contain a developer and including a developer outlet from which the developer is dischargeable. A transport member is arranged inside the housing to rotate to transport the developer to the developer outlet. A volume adjustment member is insertable inside the transport member opposite to the developer outlet to adjust an inside volume of the housing.

Developer cartridge being capable of adjusting inside volume thereof

A developer cartridge including a housing, a spring auger, and a rotation member. The housing accommodating a developer and including a first end portion and a second end portion in a lengthwise direction. The housing is to discharge the developer through a developer discharge outlet coupled to the housing and adjacent to one of the first end portion and the second end portion. The spring auger is located inside the housing and is to rotate to transport the developer to the developer discharge outlet. The rotation member is located at the first end portion of the housing and connected to a first end of the spring auger to rotate the spring auger. A first portion of a bottom surface of the housing is flat and a second portion of the bottom surface is internally convex from the first portion are repeatedly arranged on the bottom surface in the lengthwise direction.

Developer cartridge with spring auger

Growing community of inventors

Suwon-si, South Korea

Youngkwang Shin