Construction for attaching knob to manipulation rod of push-button type mechanism

Abstract

A construction for attaching a knob to a manipulation rod of a push-button type actuating mechanism. The knob has a cap-like shape with an outer wall and an inner cylinder having a bore. A snapping protrusion is formed at the lower end of the inner peripheral surface of the outer wall. The snapping protrusion has a tapered section protruding inwardly from the inner peripheral surface of the outer wall and a snapping step formed on the inner peripheral surface of the outer wall. The manipulating rod has a flange formed at its intermediate portion and resilient tongues formed on the upper end thereof. As the rod in inserted into the bore of the inner cylinder of the knob, the outer peripheral surface of the flange slides along the tapered section of the snapping protrusion spreading the outer wall outwardly and then comes into snapping engagement with the snapping step. This engagement is maintained firmly by the action of the resilient tongues which resiliently presses the rod downwardly to keep the flange in tight contact with the snapping step.

Dependencies are inferred from the claim text.