| 摘要 |
PURPOSE:To provide printing head allowing high speed and stable operation by disposing side magnet way adapted to increase maintaining force of the spring plate by a part of magnet flux so that the spring plate can be miniaturized. CONSTITUTION:In case that magnet mechanism 32 does not energize, the magnetic flux of permanent magnet 30 is formed in addition to main magnet way from N pole to S pole through first substrate 33, iron core 32a and plate spring 31 by side magnet way form next of the spring plate 31 to S pole through tip 34 and second substrate 36. The spring plate 31 is absorbed by the magnetic flux from main magnet way and side magnet way and biasly maintained. Between the spring plate 31 and iron core 32a, force of magnetic flux flowing the spring plate 31 and magnet flux flowing the spring plate 31 and magnet flux flowing the second substrate 33 is acted to be absorbed and maintained. Next the magnet mechanism 32 is energized and then the magnet flux is released by the permanent magnet 30 and the plate spring 31 is pivoted to return to normal position and a printing wire fixed to the spring plate 31 moves in the direction of platen and its end presses printing paper to the platen via ink ribbon. |
