Patent ID: 7974086

Claim:
An attachment unit for an information storage device, the attachment unit comprising: a casing that houses the information storage device; and a fixed base on which the casing is detachably mounted, wherein the casing includes a casing body that houses the information storage device, the information storage device being fixed to the casing body, a pair of rotation supporting shaft portions that are disposed at one end of the casing body in a first direction, a pair of first engagement portions that are disposed at an other end of the casing body in the first direction, and a latch portion that is disposed at the other end of the casing body in the first direction, the fixed base includes a pair of substantially L-shaped grooves into which the pair of rotation supporting shaft portions are fitted, a pair of second engagement portions with which the pair of first engagement portions engage, and a latch fitting portion into which the latch portion is fitted, and in a state where the casing is mounted on the fixed base, (i) the first engagement portions are in partial contact with the second engagement portions in the first direction, (ii) the casing body is sandwiched by the fixed base in a second direction intersecting the first direction, and (iii) the pair of the rotation supporting shaft portions and the latch portion are in partial contact with the grooves and the latch fitting portion, respectively, in a third direction intersecting the first direction and the second direction, wherein the casing body further includes a cable holding portion holding a cable that extends from the information storage device along a longitudinal axis of the casing body in the first direction, and the cable holding portion holds down the cable so as to prevent the cable from floating in a third direction wherein the latch portion which is disposed at the casing body is elastically deformable to the first direction, one end portion of the latch portion being a proximal end portion and the other end portion of the latch portion being a free end portion.