Attachment assist device and image forming apparatus employing the attachment assist device

摘要

An attachment assist device (70, 72) includes an engaging member, an engaged member (71), a drawing-force generator, biasing members (703, 704), and rotational members (705, 707). The engaging member is provided at one of a main unit (500) and a sub unit (9C, F) detachably attached to the main unit (500). The engaged member (71) is engaged by the engaging member and provided at the other of the main unit (500) and the sub unit (9C, F). The drawing-force generator generates a drawing force to draw the sub unit (9C, F) into an interior of the main unit (500). The biasing members (703, 704) are provided at the drawing-force generator to generate biasing forces in different directions. The rotational members (705, 707) are provided rotatably around support points at the drawing-force generator and engaged with the biasing members (703, 704). The biasing members (703, 704) are serially connected with the rotational members (705, 707) to convert the biasing forces of the biasing members (703, 704) to the drawing force.