Importance

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Abstract

A device for detecting the movement of an object in order to operate a switch, wherein a top or contact of an angled contact part of a contact spring piece of the device comes into contact with a set position of an object, such as a digital video cassette ( DVC) or other cassette or disk which is being transferred so that various kinds of detecting operations are performed. The contact spring piece of the detecting device is improved in durability by forming a flexible spring part, of a predetermined dimension, between an upright mounting plate part and a U-shaped spring part of the contact spring piece. The contact spring piece is made of a plate spring. The contact spring piece includes the upright mounting plate part, the U-shaped spring part, and the angled contact part such that a long spring span is formed between the upright mounting plate part and the angled contact part. The flexible spring part is made to flex by the load of the contact pressure of the object on the angled spring part. The mounting plate part, having at least one contact spring piece functioning as a terminal, is inserted into and fixed to a slit in a back plate of an L-shaped insulating stock so that the terminal extends from a lower part of the upright mounting plate part past a lower end of a base of the L-shaped insulating stock. The angled contact part, attached to the U-shaped spring part, extends in front of the back plate. A lower end of the angled contact part is inserted into a slit in the base of the L-shaped insulating stock and the lower end of the angled contact part is pressed toward a front end of the base. A top of the U-shaped spring part of the contact spring piece engages a stopping recess at an upper end of the back plate.

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First Claim