| 摘要 |
PURPOSE: To enable the projection degree of a cleaning wire from the front end of a tubular piece for recording to be adjusted by separating a drop weight body into two parts and constituting the cleaning wire so that a rod part fixed with it can be displaced in the axial direction in an abutment face. CONSTITUTION: A cleaning wire 21 which perforates the central opening of a metallic part 22 and extends is fixed to the front end of a rodlike synthetic resin part 20 of a drop weight body. The outside face of the base wall of the metallic part 22 is placed on a rib 23 provided in an internal bore 18 and the cleaning wire 21 is placed in the position farthest shifted to the front part and the projection degree from the front end of a tubular piece 11 for recording is decided. At time of assembly, the projection degree is changed by pressing the synthetic resin part 20 into the metallic part 22 or pulling out it therefrom until reaching the desired projection degree. Then, both sides are combined by an adhesive and the projection degree of the cleaning wire 21 from the front end of the tubular piece 11 for recording is fixed. |
