US 12,459,260 B2
Liquid droplet discharging head
Takaaki Yoshino, Nagoya (JP); Toru Kakiuchi, Chita (JP); and Taisuke Mizuno, Yokkaichi (JP)
Assigned to BROTHER KOGYO KABUSHIKI KAISHA, Nagoya (JP)
Filed by BROTHER KOGYO KABUSHIKI KAISHA, Nagoya (JP)
Filed on Dec. 4, 2023, as Appl. No. 18/527,857.
Claims priority of application No. 2023-033136 (JP), filed on Mar. 3, 2023.
Prior Publication US 2024/0294010 A1, Sep. 5, 2024
Int. Cl. B41J 2/14 (2006.01)
CPC B41J 2/14233 (2013.01) [B41J 2/14201 (2013.01); B41J 2002/14475 (2013.01); B41J 2202/11 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A liquid droplet discharging head, comprising:
a channel member having a channel including a nozzle and a pressure chamber communicating with the nozzle; and
a piezoelectric element fixed to the channel member and configured to apply pressure to liquid inside the pressure chamber to discharge liquid droplets of the liquid from the nozzle,
wherein a natural frequency Fr of the channel is not less than 250 kHz, and
a diameter D [μm] of the nozzle has a relationship of the following expression (1) with the natural frequency Fr [kHz]:

OG Complex Work Unit Math