DROPLET EJECTING APPARATUS

摘要

Provided is a droplet ejecting apparatus by which durability of a portion driven by a piezoelectric element and productivity can be improved. The droplet ejecting apparatus is provided with a pressurizing chamber (42) communicating with a nozzle (41); a vibrating membrane (32) forming a part of the pressurizing chamber (42); a piezoelectric element for vibrating the vibrating membrane (32); a protruding section (31) provided on the vibrating membrane (32) by being connected to the piezoelectric element, for transmitting vibration to the vibrating membrane (32), and a flow channel (35) communicating with the pressurizing chamber (42). The droplet ejecting apparatus ejects a droplet from the nozzle (41). At least a base portion in the vicinity of the vibrating membrane (32) on the protruding section (31) is an expanding section whose cross-sectional area increases toward the vibrating membrane. An angle formed by the vibrating membrane (32) and a side wall (31b) of the expanding section is obtuse and/or a boundary section between the vibrating membrane (32) and the side wall (31b) is rounded (R1).