| 摘要 |
An object insertion and separation sensing apparatus and method is provided for detecting the insertion or separation of a predetermined object into or from a main body. Included is a tactile switch installed on a circuit board provided in the main body, an elastic plate installed spaced a predetermined distance from the tactile switch and elastically pressing the tactile switch by an external force, an elastic member installed to face the tactile switch with respect to the elastic plate where the elastic plate is interposed between the elastic member and the tactile switch, one end of the elastic member is contacting the elastic plate, and a button having one end thereof contacting the other end of the elastic member and the other end thereof pressed by the object being inserted in the main body, so that the elastic member and the elastic plate are consecutively pressed to operate the tactile switch. Thus, the impact according to the collision with the paper cassette which is an object to be inserted and separated is separately received by the compression spring and the elastic plate so that deformation of the collision portion can be reduced. Also, when the object enters, more allowance in the distance of the excessive movement can be secured so that the burden in the manufacture can be lessened.
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