| 摘要 |
<p>PURPOSE:To improve stability of injecting ink due to interference between pressurizing chambers of a multinozzle head by providing a groove within the thickness of a vibration plate at a position slightly escaped to the inside of the pressurizing chamber from a boundary between the pressurizing chambers of the vibration plate. CONSTITUTION:A vibration plate 12 made of the same material as that of a base plate 11 is thermally fusion-adhered to the base plate 11. No groove 13 is provided at the time of fusion-adhering, and the vibration plate 12 is flat. A piezoelectric element 14 is adhered to the vibration plate 12. The piezoelectric element 14 is not individually divided corresponding to respective pressurizing chambers at the time of adhering but adhered in a large flat plate shape. The thus laminated piezoelectric element 14 and the vibration plate 12 are cut by a diamond wheel to form a groove 13 having 1/2 of thickness of the vibration plate 12 on the boundary of the respective pressurizing chambers. Since the flat plate is bent generally by applying a deflection inversely proportional to the cube of the thickness for the same force, it is considered that the influence to the adjacent pressurizing chamber is substantially proportional to the cube of the thickness of the plate. Therefore, since the influence is reduced to 1/8 as compared with the vibration plate not formed with the groove, the respective pressurizing chambers can be disposed at near positions, and a driving voltage can be lowered due to the decrease in the rigidity of a vibration system.</p> |
