| 摘要 |
PURPOSE:To fix a rotary arm, etc. and a magnet erasing head conveniently and rationally, by coupling a head retaining part and an erasing head of a cassette type tape recorder by use of a penetrating hole. CONSTITUTION:One end part of a rotary arm 1 consisting of synthetic resin material which is comparatively rich in elasticity is made head retaining part, a supporting projection 10 is formed in a body to a regular position of the bottom plate 8 which forms the retaining part 3, the projection 10 is fitted into a rectangular hole 5 of an erasing head 4, and a pressing projection piece 11 is made to rise corresponding to the projection 10 on the back plate 6. And when the head is mounted to the retaining part 3, the head 4 is pressed down and fixed by inserting the tip of the projection 10 into the lower part of the hole 5. In this case, the upper edge of the hole 5 is pressed downward diagonally by the inclined plane of the slanting tip 10c, the rear edge part of the upper surface of the head 4 is pressed downward vertically, and the head 4 is located by the thick part 10a of the projection 10 and simultaneously it is fixed completely. |
