Importance

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Abstract

An analog pointing key structure includes a rigid body key top; a surrounding member having a hole for exposing the key top; a support member, to which the key top is fixed, having an elastic returning part that permits the key top to move in a direction along a surface thereof and to cancel the movement; a ring-form magnetic member fixed to the support member on a back surface of the surrounding member so as to be interposed between the key top and the returning part; a magnetic sensor that measures a change in magnetic flux density due to displacement of the magnetic member which moves together with the key top; a ring-form screen plate provided on a surface of the magnetic member so that an inner-peripheral part of the plate is positioned within the above hole; a key top support plate, to which the key top is attached, an outer-peripheral part of the support plate being positioned on a back surface of the screen plate, and the support plate having an outer diameter larger than an inner diameter of the screen plate, and; an elastic member, fixed to a back surface of the support member, permitting the key top to move in a thickness direction of the support member and to cancel the movement.

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First Claim