| 摘要 |
A liquid discharge head comprises a discharge port for discharging liquid as a droplet; liquid flow paths communicated with the discharge port, being provided with heat generating members for generating bubbles by providing thermal energy for liquid; and a common liquid chamber for retaining liquid to be supplied to the liquid flow paths. For the liquid discharge head thus structured, a narrower portion is provided between the liquid flow path and the heat generating member, and between the narrower portion and the heat generating member, a displaceable plate type movable member is provided in the liquid flow path thereof, and this movable member is formed to stand up from the surface of the liquid flow path having the heat generating member in the direction substantially perpendicular to the liquid supplying direction, having a designated gap in the narrower portion in the liquid supplying direction, and a fine gap in the plane of the free end thereof facing the surface of the liquid flow path having the heat generating member. With the structure thus arranged, the diffusion of the pressure exerted by bubbling to the upstream side is suppressed so as to conduct the exerted pressure to the discharge port side (downstream side) efficiently.
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