Abstract: In a conventional IC card connector, guide walls provided on side walls of a housing comprise surfaces parallel to each other, and an interval between the guide walls is somewhat greater than a maximum width of a standard of the IC card. If the IC card having the width less than the maximum value of the standard is used, the IC card is greatly slanted due to a large amount of play, and an operation member of a detection switch cannot be operated by the IC card. In an IC card connector of the present embodiment, if the width of the IC card is small, the IC card is supported at sides by vertical surfaces, thus the movement of the IC card in the widthwise direction is regulated. If the width of the IC card is large, the IC card is supported at the side by a slope, thus the movement of the IC card is regulated.

Abstract: A supporting structure of a magnetic head device in which small holes of the same size are formed so as to be distributed in a resiliently deformable portion in order to reduce the spring constant thereof and make the resiliently deformable portion less susceptible to torsional resonance. In particular, when the holes are formed at equal intervals in a direction parallel to diagonals drawn across the resilently deformable portion so that the holes are not formed on the diagonals, a structure less susceptible to torsional resonance can be provided.