| 摘要 |
A convertible print head carrying a plurality of needles comprises a rear portion carrying members controlling the needles and a front one portion including a slidable third device at the rear portion. The front one portion includes a front bracket comprising two portions carrying industrial rubies in which are guiding channels for said needles arranged in vertical columns. A first control device allows a relative displacement between said two portions so as to align or offset the positions of the needles in the columnar arrangements. A second control device is adapted to displace vertically the two portions simultaneously by means of an electromagnet. The front bracket is connected to an assembly by means of two flexible blades of the slidable third device. |
