| 摘要 |
PROBLEM TO BE SOLVED: To attempt the way to efficiently assemble a ball-point pen and securely fix a bush to a shaft cylinder. SOLUTION: The knocking mechanism of this ball-point pen is equipped with a bush 6 consisting of a rotor 3 which is located between a knocking rod 1 and an ink tube 2 and is rotated by the pressing of the knocking rod 1, a vertical groove 4 which is formed in the longitudinal direction and guides the rotor 3 in the lateral direction and an obliquely stepped part 5 which is located at the tip of the vertical groove 4 and engageable by rotation of the rotor 3. In addition, an elastic piece part 7 with resilience in the radial direction is formed near the base end part of the bush 6 and an engaging protrusion 8 is provided on the outer face of the elastic piece part 7. Further, near the base end part off the elastic piece part 7 toward the base end part from the engaging protrusion 8, a protrusion 11 for positioning the engaging protrusion is provided serially with the engaging protrusion 8. Besides, the engaging protrusion 8 is engaged with an engaging hole 10 near the base end part of the shaft cylinder 9 and the positioning protrusion 11 is engaged with a recessed part 12 for positioning the engaging protrusion 8 provided in the axial direction. The knocking rod 1 is always arranged inside the elastic piece part 7. |
