| 摘要 |
PROBLEM TO BE SOLVED: To improve a moldability such as a mold accuracy of a top plate member on which an ink channel, a discharge opening and the like are to be provided. SOLUTION: A top plate 5 is joined onto a heater board 1 where a discharge heater corresponding to a nozzle 7 is set. The top plate 5 consists of a first base body 21 including an ink discharge opening 6a and the nozzle 7, and a second base body 22 comprised of the other parts. The first base body 21 and second base body 22 are formed in one body by joining through two-color molding. An insert member 31 is arranged to an interface of the second base body 22 to the first base body 21.
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