Patent ID: 7246960

Claim:
A print head for selectively projecting a plurality of needles to perform printing, characterized in that the respective proximal ends of the plurality of needles on the drive side are arranged on the circumference of a circle, so that the needles constitute a cone-shaped needle bunch converged in a manner such that tip ends for forming dots are arranged straight in a dotting position, the needle bunch is kept in the cone-shaped configuration by a needle guide, the needle guide is composed of a first guide wall and a second guide wall arranged in the longitudinal direction of the needle bunch, the first guide wall being placed on the tip end side of the needle bunch and the second guide wall being spaced from the first guide wall by the distance (x), and the first guide wall and the second guide wall are walls perpendicular to the longitudinal direction of the needle bunch and are formed into an integral block, the guide walls having through holes penetrated parallel to the longitudinal direction of the needle bunch by the needles, the through holes of the first guide wall and the second guide wall for one needle (No. n) being shifted from each other in the convergence direction of the needles by a shift amount (δn) determined by the distance (x) and a convergence angle (θn) of the needle.