| 摘要 |
Provided are a liquid discharge head by which discharged liquid droplets can be easily gathered into one droplet, and a recording device using the head. A liquid discharge head (2) comprises a liquid pressurizing chamber (10), a displacement element (50) which applies pressure to the liquid pressurizing chamber (10), a liquid discharge hole (8), and a communication path (7) which connects the liquid pressurizing chamber (10) and the liquid discharge hole (8), wherein the communication path (7) comprises a narrow portion (7-3) which has a small cross-sectional area, a first communication path (7-1) defined by a portion between a connection end to the liquid pressurizing chamber (10) and a connection end to the narrow portion (7-3), and a second communication path (7-2) defined by a portion between a connection end to the liquid discharge hole (8) and a connection end to the narrow portion (7-3), and wherein a ratio between a length of the communication path (7) and a length of a second communication path (7-2), a ratio between a synthetic inertance of the liquid pressurizing chamber (10) and the first communication path (7-1) and a synthetic inertance of the liquid discharge hole (8) and the first communication path (7-1), and a ratio between a synthetic compliance of the liquid pressurizing chamber (10) and the first communication path (7-1) and a synthetic compliance of the liquid discharge hole (8) and the first communication path (7-1), are in predetermined ranges.
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