Liquid discharging apparatus

Patent metadata

Field	Value
Publication number	US-10618279-B2
Application number	US-201815991243-A
Country	US
Kind code	B2
Filing date	May 29, 2018
Priority date	May 31, 2017
Publication date	Apr 14, 2020
Grant date	Apr 14, 2020

Abstract

A liquid discharging apparatus includes: a liquid compartment; a flowing-in passage that is in communication with the liquid compartment through a flowing-in opening, the liquid flowing through the flowing-in passage into the liquid compartment; a nozzle that is in communication with the liquid compartment through a communication opening; a capacity changer that causes the liquid contained in the liquid compartment to be discharged from the nozzle by causing a displacement of an inner wall surface of the liquid component and changing capacity of the liquid compartment; and a flowing-in passage resistance changer that changes capacity of the flowing-in passage to change flow resistance of the flowing-in passage. In the liquid compartment, as viewed from the flowing-in opening, the communication opening is located in front of a center-of-displacement portion, an amount of the displacement of which is largest in the inner wall surface displaced by the capacity changer.

First claim

What is claimed is:

1. A liquid discharging apparatus, comprising:
a liquid compartment that contains a liquid;
a flowing-in passage that is in communication with the liquid compartment through a flowing-in opening for the liquid compartment, the liquid flowing through the flowing-in passage into the liquid compartment;
a nozzle that is in communication with the liquid compartment through a communication opening for the liquid compartment, the liquid contained in the liquid compartment being discharged from the nozzle;
a capacity changer that causes the liquid to be discharged from the nozzle by causing a displacement of an inner wall surface of the liquid compartment and changing capacity of the liquid compartment; and
a flowing-in passage resistance changer that changes capacity of the flowing-in passage to change flow resistance of the flowing-in passage,
wherein, in the liquid compartment, the communication opening is located at a same side where the flowing-in opening is provided with respect to a location where a center-of-displacement portion is provided so that the communication opening is between the flowing-in opening and the center-of-displacement, wherein the center-of-displacement portion is a portion where an amount of the displacement of the inner wall surface that is displaced by the capacity changer is largest.

2. The liquid discharging apparatus according to claim 1 ,
wherein, in the liquid compartment, within an area located closer to the flowing-in opening than the center-of-displacement portion is, the communication opening is located closer to the flowing-in opening than to the center-of-displacement portion.

3. The liquid discharging apparatus according to claim 1 ,
wherein, in the liquid compartment, within an area located closer to the flowing-in opening than the center-of-displacement portion is, the communication opening is located closer to the center-of-displacement portion than to the flowing-in opening.

4. The liquid discharging apparatus according to claim 1 , further comprising:
a flowing-out passage through which the liquid flows out from the liquid compartment.

5. The liquid discharging apparatus according to claim 4 , further comprising:
a circulation passage for circulation, to the liquid compartment, of the liquid flowing out through the flowing-out passage.

6. The liquid discharging apparatus according to claim 4 , further comprising:
a flowing-out passage resistance changer that changes capacity of the flowing-out passage to change flow resistance of the flowing-in passage; and
a controller that controls the capacity changer, the flowing-in passage resistance changer, and the flowing-out passage resistance changer, and executes discharge processing for discharging the liquid in a form of a droplet from the nozzle,
wherein, in the discharge processing, the controller causes the liquid to start going out from the nozzle by causing the capacity changer to decrease the capacity of the liquid compartment, and causes the flowing-in passage resistance changer to increase the capacity of the flowing-in passage during the going out of the liquid from the nozzle so as to separate the droplet from the liquid of the nozzle and release the droplet into air; and
wherein, in the discharge processing, before causing the capacity changer to decrease the capacity of the liquid compartment so as to cause the liquid to start going out from the nozzle, the controller causes the flowing-in passage resistance changer to increase the flow resistance of the flowing-in passage and causes the flowing-out passage resistance changer to increase the flow resistance of the flowing-out passage.

7. The liquid discharging apparatus according to claim 1 , further comprising:
a controller that controls the capacity changer and the flowing-in passage resistance changer, and executes discharge processing for discharging the liquid in a form of a droplet from the nozzle,
wherein, in the discharge processing, the controller causes the liquid to start going out from the nozzle by causing the capacity changer to decrease the capacity of the liquid compartment, and causes the flowing-in passage resistance changer to increase the capacity of the flowing-in passage during the going out of the liquid from the nozzle so as to separate the droplet from the liquid of the nozzle and release the droplet into air.

8. The liquid discharging apparatus according to claim 7 ,
wherein, in the discharge processing, before causing the capacity changer to decrease the capacity of the liquid compartment so as to cause the liquid to start going out from the nozzle, the controller causes the flowing-in passage resistance changer to increase the flow resistance of the flowing-in passage.

9. The liquid discharging apparatus according to claim 7 ,
wherein the controller causes the capacity changer to increase the capacity of the liquid compartment in a process of causing the flowing-in passage resistance changer to decrease the capacity of the flowing-in passage.

Assignees

• Seiko Epson Corp

Inventors

• Sakai Hirofumi
• Katakura Takahiro
• Sugai Keigo
• Nakamura Shinichi
• Sano Junichi

Classifications

• B41J2/04541

  Specific driving circuit · CPC title

• B41J29/38

  Drives, motors, controls or automatic cut-off devices for the entire printing mechanism · CPC title

• B41J2/07

  characterised by jet control (B41J2/205 takes precedence) · CPC title

• B41J2/18

  Ink recirculation systems · CPC title

• B41J2/175 Primary

  Ink supply systems {; Circuit parts therefor} · CPC title