| 摘要 |
PROBLEM TO BE SOLVED: To reduce the weight and cost of the unit of an ink jet head as an exchange part by a method wherein a heat sink is provided on a carriage side. SOLUTION: In an ink jet recording device, in which recording is performed by jetting ink against printing paper from the nozzle of an ink jet head 10, a unit 11 containing an ink jet head 10, its driver IC 13 and a board 12 is detachably installed on a carriage 9 travelling along a recording region. Further, a heat sink 18 is provided through leaf springs 19 to the carriage 9 side so as to bring the heat sink 18 in tight contact with the driver IC 13 under the condition that the unit 11 is installed on the carriage 9 and, in addition, bring the board 12 in contact with a signal cable 48, resulting in necessitating neither heat sink nor signal cable on the unit 11. |
