| 摘要 |
An external storage device is provided, which can call attention to the handling as precision electronic equipment so as to obtain an appropriate attachment action for a cap while preventing the cap from easily coming off. A substrate holder 13 is made of a transparent material. At the same time, notches 19A and 20A for externally exposing the substrate holder 13 are formed in a main body 11 and a cap 14, respectively. A memory substrate 12 present inside can be visibly observed from the exterior through these notches 19A and 20A and the transparent substrate holder 13. Moreover, a pair of guide edges 28 and 29 are formed so that the notches 19A and 20A are parallel in an attachment/removal direction of the cap 14 and to oppose to each other, whereas guide parts 30 and 30 in sliding contact with the guide edges 28 and 29 along their total length are provided for the substrate holder 13 so as to guide the attachment/removal of the cap 14.
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