| 摘要 |
PROBLEM TO BE SOLVED: To solve troubles in which the intermediate part of a mechanical pencil writing body is bent to hinder the insertion of a lead, the lead is propelled erroneously when fitted, and the lead is broken when the excessively propelled lead is returned. SOLUTION: The mechanical pencil writing body is set in a multiple writing implement in which a plurality of writing bodies including at least one mechanical pencil writing body, and the tip of the writing body is protruded selectively from a shaft tip. In the mechanical pencil writing body, the head part of a chuck is arranged at the front end of a shaft joint through a fastening tool, the front end of a relay body is connected to the rear end of the chuck penetrating the axis center of the shaft joint, a coil spring is biased to pull the chuck backward between step parts formed at the rear end of the shaft joint and in the relay body, the rear end part of a guide pipe is fixed to the peripheral part of a fitting part formed at the rear end of the relay body, and the front end part of the guide pipe is engaged with the peripheral part of a nozzle with a clearance not to hinder the mutual sliding left, so that the fitting part can be fitted freely attachably/detachably to the front end of a lead pipe formed in a multiple writing implement main body. |
