| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a complex writing instruments that stores a plurality of writing elements in a shaft tube 1, in which the writing element and the operation member connected to the rear edge are composed exchangeably, and can use a solid lead feeder that feeds a solid lead 13 as the writing element. <P>SOLUTION: The solid lead feeder is composed by connecting a guide cylinder 12 to a chuck unit that has a chuck 4 and a spring 8 that biases the chuck 4 to backward in the longitudinal direction. The solid lead 13 is built in the guide cylinder 12, and the solid lead 13 is fed by a push rod 11 that advances by the forward movement of the chuck 4. In addition, the maximum outer diameter of the guide cylinder 12 and the chuck unit is composed smaller than inner diameters of the coil spring 3 of the complex writing instruments. <P>COPYRIGHT: (C)2013,JPO&INPIT |
