A replaceable unit for an electrophotographic image forming device according to one example embodiment includes an electrical contact positioned on a first side of a housing of the replaceable unit for contacting an electrical contact in the image forming device. A guide on the first side of the housing is positioned closer to a front of the housing than the electrical contact and leads rearward toward the electrical contact. The guide includes an inside surface that faces inward sideways toward a second side of the housing. At least a portion of the inside surface is angled inward sideways from front to rear permitting contact between the inside surface and an electrical connector in the image forming device to draw the electrical connector in the image forming device inward sideways relative to the replaceable unit during insertion of the replaceable unit into the image forming device.

A terminal contact structure includes a first terminal provided on a removable body; a second terminal provided on an apparatus body in which the removable body is inserted, the second terminal not being in contact with the first terminal when the removable body is in a removable state, the second terminal being in contact with the first terminal when the removable body is in a fixed state; and a guide member provided on the apparatus body and having a first surface and a second surface, the first surface guiding the first terminal in an insertion direction in which the removable body is inserted, the second surface guiding the second terminal in a contact direction in which the second terminal comes into contact with the first terminal, the contact direction being a crossing direction that crosses the insertion direction.

An grounding structure of an equipment includes a coil spring provided between a first member of an equipment side and a second member, which includes a metal plate member, of a ground side, wherein the first member and the second member are disposed opposite to each other, one end of the coil spring is brought into press contact with the first member, and the other end of the coil spring is brought into press contact with the second member. An engraved groove is formed at an abutting point of the second member with the coil spring, and is formed such that at least a part of a convex burr part generated along an end edge of the engraved groove abuts the other end of the coil spring.

An image forming apparatus includes a main body, a tray for a toner cartridge slidably coupled to the main body, a lever hinge-coupled to the tray to rotate, and a link member, hinge-coupled to the lever, to move when the lever is rotated. The lever rotates in a first direction when the tray is pushed into the main body and rotates in a second direction opposite to the first direction when the tray is pulled out from the main body. The link member moves in a third direction when the lever is rotated in the first direction to so that pressure is applied to a customer replacement unit memory (CRUM) contact unit and moves in a fourth direction opposite to the third direction when the lever is rotated in the second direction so that the pressure is released from the CRUM contact unit.

In accordance with an embodiment, an image forming apparatus comprises an external connection control section, a determination section and a guidance control section. The external connection control section controls connection with an external device. The determination section determines a type of the external device connected with the image forming apparatus. The guidance control section selects, on the basis of a determination result of the determination section, a message of guidance and displays the message on a display device.

A developing cartridge includes a developing electrode and a supply electrode. The developing electrode includes a first electrical contact in contact with a developing roller shaft, and a second electrical contact positioned closer to the developing roller shaft than a second agitator gear is to the developing roller shaft. The second electrical contact is positioned farther from the developing roller shaft than the first electrical contact is from the developing roller shaft. The supply electrode includes a first electrical contact in contact with the supply roller shaft, and a second electrical contact positioned closer to the developing roller shaft than the second agitator gear is to the developing roller shaft. The second electrical contact of the supply electrode is positioned farther from the developing roller shaft than the second electrical contact of the developing electrode is from the developing roller shaft.

A contact point end portion of a second ring connected to a first ring portion on a power reception portion side protrudes further in the direction of a power reception portion than a contact point end portion of the first ring connected to a spring portion on a power reception portion side.

A cartridge for an image forming apparatus includes: a process unit to be used to form an image; a first member including a first resin material; a second member including a second resin material having higher flame retardant capability than the first resin material; and an electrode member including a contact section configured to be supplied with power from an apparatus main body of the image forming apparatus. The electrode member is configured to electrically connect the apparatus main body to the process unit. The second resin material of the second member has a greater density than the first resin material of the first member. The contact section is located in the vicinity of the first and second members and is closer to the second member than to the first member.

A developing cartridge includes a casing, a developer-carrying member, a supply member, a developing electrode, a supply electrode, and an insulating member. The casing is configured to accommodate therein developer. The developer-carrying member is configured to rotate about a rotational axis and carry the developer thereon. The supply member is configured to supply the developer to the developer-carrying member. The developing electrode is configured to be electrically connected to the developer-carrying member. The supply electrode is configured to be electrically connected to the supply member. The insulating member insulates the developing electrode and the supply electrode with each other. The developing electrode, the insulating member, and the supply electrode are overlapped in this order in an axial direction of the rotational axis.

A replaceable unit for an electrophotographic image forming device according to one example embodiment includes an electrical contact positioned on a first side of a housing of the replaceable unit for contacting an electrical contact in the image forming device. A guide on the first side of the housing is positioned closer to a front of the housing than the electrical contact and leads rearward toward the electrical contact. The guide includes an inside surface that faces inward sideways toward a second side of the housing. At least a portion of the inside surface is angled inward sideways from front to rear permitting contact between the inside surface and an electrical connector in the image forming device to draw the electrical connector in the image forming device inward sideways relative to the replaceable unit during insertion of the replaceable unit into the image forming device.