A drawer unit includes: a drawer member allowed to shift toward a storage unit in an inserting direction, or shift from the storage unit in a drawing direction; a lock member rotatably supported by the drawer member; a first regulation member that engages with the lock member to regulate a shift of the drawer member when the drawer member is located at a first position; a second regulation member that engages with the lock member to regulate a shift of the drawer member when the drawer member is located at a second position; and an operation unit that receives a first operation that rotates the lock member in the drawing direction to allow engagement between the lock member and the first regulation member, and a second operation that rotates the lock member in the inserting direction to allow engagement between the lock member and the second regulation member.

A paper guide mechanism that facilitates operation without easily allowing deviation of a wide guide unit. In a paper guide mechanism (10), a position-holding member (13) holds the widthwise position of a widthwise moving member (12) by bringing a first fixing-side locking section (11e) and a first moving-side locking section (13d) into contact with each other on a surface perpendicular to a direction of movement of the widthwise moving member (12) even in a case in which the widthwise moving member (12) is about to move in any direction along the width direction. The position-holding member (13) has a movement-restricting section (13e). The movement-restricting section (13e) restricts the movement of the position-holding member (13) in an orientation in which the first fixing-side locking section (11e) and the first moving-side locking section (13d) are moved away from each other by bringing the position-holding member (13) into contact with a second surface of a supporting member (11) on a side opposite to a first surface.

This paper guiding mechanism (110) includes a base member (1) including a placing surface (11) for placing papers (200) thereon and a base-side lock portion (12) and a paper guide member (2), while the paper guide member includes a paper aligning portion (21) coming into contact with the papers, a guide-side lock portion (22) locked to the base-side lock portion, and a lever portion (23) canceling a locked state of the guide-side lock portion with respect to the base-side lock portion and maintaining an unlocked state when the paper aligning portion is slidingly moved.

A sheet feeding device includes a sheet feeding cartridge, a pair of fixed rails, a pair of movable rails and a pressing part. The sheet feeding cartridge has a pair of side plates extending in taking-out/taking-in directions and is taken out/in an installed part in an apparatus main body. The fixed rails are extended in the taking-out/taking-in directions in the installed part. The movable rails are provided to move in the taking-out/taking-in directions along the fixed rails. If the pressing part is provided in one side plate, the pressing part applies biasing force to one movable rail facing to one side plate so that another side plate comes into pressure contact with another movable rail. If the pressing part is provided in one movable rail, the pressing part applies biasing force to one side plate so that another side plate comes into pressure contact with another movable rail.

An optional device of the present disclosure is attachable and detachable with respect to an image forming apparatus via a connection member fitted to a side face of a main body of the optional device. The connection member includes a shaft, a connector, and a lock member. The shaft is supported by the main body to be slidable in an axial direction. The connector is fixed to the shaft and coupled to the image forming apparatus. The lock member is capable or restricting movement of the shaft in the axial direction. A position of the connector is adjusted by releasing the restriction placed on the shaft by the lock member and then sliding the shaft in the axial direction.

A sheet storage cassette includes a cassette body, a cassette cover, and a lock mechanism. The lock mechanism includes a lock member swingably provided on a back-surface side of the cassette cover and engageable with a locking pin provided in the cassette insertion portion, and a biasing member biasing the lock member in a direction toward engagement with the locking pin. Along with an operation of inserting the cassette body into the cassette insertion portion, the lock member engages with the locking pin. In a state where the cassette body is inserted in the cassette insertion portion, by inserting a thin-plate shaped release member into a gap between the cassette cover and an exterior member arranged under and adjacent to the cassette cover, the lock member is caused to swing to release the engagement with the locking pin.

A removable media tray assembly for an image forming device according to one embodiment includes a media tray having a bottom surface and a front wall extending upward from the bottom surface. A bottom surface defines a media storage location for storing a stack of media sheets. The assembly includes a housing having an opening therein to receive the media tray. A magnet and a plate provide a latching force FL greater than a pick motor stall force keeping the media tray in a closed position during media picking. A handle assembly including a finger bar and a pivoting link is mounted to the front wall. With the media tray being held closed by the latching force, a user-supplied actuation force FA that is less than 22.2 N applied to the finger bar, pivots the link which acts as a force multiplier providing a release force exceeding the latching force.

A sheet processing apparatus has a main body with an insertion slot for a sheet cassette. The sheet cassette has a moveable pin member. A housing in the main body includes a lever partially rotatable about a first axis. The lever has a pin engagement portion at an end of the lever that rotates about a second axis and has an engagement groove into which the pin member can be inserted from a first pin engagement position and a second pin engagement position when the lever has rotated about the first axis. An elastic member applies a force to the lever to rotate the lever toward the insertion direction of the cassette. The housing includes a chassis having a guide groove extending along the insertion direction. The guide groove includes an inclining portion that is inclined with respect to the insertion direction.

A sheet feeding apparatus is provided with a pick-up roller that contacts sheets loaded on a load tray to pick up, a paper feed roller that feeds a picked-up sheet, and a separation roller brought into press-contact with the paper feed roller to separate the sheet, where the sheets are separated from the pick-up roller, the separation roller is rotated in a sheet return direction different from a sheet feed direction, and subsequently, the paper feed roller is separated from the separation roller. It is possible to prevent damage to a sheet and sheet jam from occurring in pulling out the load tray loaded with sheets to the front side.

A sheet feeding device includes a stacking tray, a feeding portion, a first restricting member which includes a first restricting surface and a first supporting portion, a second restricting member which includes a second restricting surface and a second supporting portion, and an interrelating portion. In a state in which the first restricting surface and the second restricting surface are brought closest to each other, a part of the first restricting portion is positioned on a second restricting surface side with respect to a center line of the stacking tray, and a part of the second restricting portion is positioned on a first restricting surface side with respect to the center line.