| 摘要 |
PURPOSE:To provide a small writing tool of easy operation which prevents the careless protruding of a writing ink shaft of a ball point pen and can be operated simply by one hand. CONSTITUTION:A writing tool consists of a cylindrical case 1, a pressing body 2 protruding from the upper end of the case 1 by the elasticity of a spring 14, writing ink shafts 12 and 13 protrusible alternately from a small hole 1g of the case 1 set in the case 1, and cams 4 and 5 provided in the case 1 for making alternately protrude or diappear the lower ends of the writing ink shafts 12 and 13 in compliance with the pressing of pressing body 2 provided in the case 1. |
