JPS5496008A - Tape final end detector of cassette tape recorder - Google Patents

Abstract

PURPOSE: To perform smooth and stable automatic stopping operation by providing a cam which is coaxially protrusively provided to a rotator and protrusions in the symmetrical position of the cam face of the largest diameter part of the cam of the rotator.

CONSTITUTION: A rotator 36 is provided with an island from cam near its central part and a groove A of a single path is formed in arc form of a fixed radius R from the rotating center in the specified rotating angle range of the rotating face. A central groove A' of the same radius as that of the groove A and an inner groove B and outer groove C positioned on the inner and outer sides in said groove are beforehand branched and formed on the rotating direction leading end side of the remaining rotating angle range. Next, the protrusion 37 positioned between the grooves A', B is made finer on the rotating direction leading end side and the rotating direction trailing end side of its outside peripheral surface is notched to form an inner path D which shorts the grooves A', B. Further the protrusion 38 positioned between the grooves A', C is made finer at its rotating direction leading end side and the rotating direction trailing end side of its inside peripheral surface is notched to form an outer path E communicating the grooves A', C. Thereby, smooth and stable automatic stopping operation may be performed.

COPYRIGHT: (C)1979,JPO&Japio