CN-115122779-B - Liquid ejecting apparatus

CN115122779BCN 115122779 BCN115122779 BCN 115122779BCN-115122779-B

Abstract

The invention provides a liquid ejecting apparatus capable of reducing leakage of liquid from a nozzle of a head even if an external environment such as an increase in air temperature changes. The multi-functional machine includes a head having a nozzle for ejecting a liquid, a tank at least a part of which is located above an opening of the nozzle, the liquid forming a liquid surface and being stored in the tank, an atmosphere communication passage for communicating a gas layer of the tank with the outside through an atmosphere opening, and a valve unit for bringing the atmosphere opening or the atmosphere communication passage into a communication state or a non-communication state. The valve unit is turned from the non-communication state to the communication state when the power supply is turned from on to off.

Inventors

OSAKABE YOSHINORI
Nakasaki Shiro
Bai Yetaiyi
Sosuke Kuroyanagi

Assignees

兄弟工业株式会社

Dates

Publication Date: 20260512
Application Date: 20220309
Priority Date: 20210326

Claims (14)

1. A liquid ejecting apparatus includes: A head having a nozzle for ejecting a liquid; a storage unit in which at least a part of the liquid is located above the opening of the nozzle, and the liquid forms a liquid surface and is stored; an atmosphere communication path for communicating the gas layer of the storage unit with the outside through an atmosphere opening port; A valve unit for switching between a communication state in which the gas layer of the reservoir is communicated with the outside and a non-communication state in which the gas layer of the reservoir is not communicated with the outside, and The power button is provided with a power button, The power button is operated by switching from a connection to a disconnection, and switches the liquid ejecting apparatus from a standby state to a standby state in which power supply to the drive source is stopped and an input from a user is waited, When the power button is operated from on to off, the valve unit is switched from the non-communication state to the communication state.
2. The liquid ejection device according to claim 1, wherein, The liquid ejecting apparatus further includes: A driving mechanism for driving the valve unit, and The controller is used for controlling the operation of the controller, The controller drives the driving mechanism to switch the valve unit from the non-communication state to the communication state by operating the power button from on to off.
3. The liquid ejection device according to claim 2, wherein, The controller drives the driving mechanism based on a first condition set in advance in the standby state to switch the valve unit from the communication state to the non-communication state.
4. The liquid ejection device according to claim 3, wherein, The controller drives the driving mechanism based on a second condition set in advance in the standby state to switch the valve unit from the non-communication state to the communication state.
5. The liquid ejection device according to claim 1, wherein, The liquid ejecting apparatus further includes: a carriage for carrying the head and moving the head; A driving source for driving the carriage, and The controller is used for controlling the operation of the controller, The valve unit changes state in conjunction with the movement of the carriage, The controller drives the drive source to switch the valve unit from the non-communication state to the communication state by operating the power button from on to off.
6. The liquid ejection device according to any one of claims 2 to 4, wherein, The valve unit is switched between the non-communication state and the communication state by rotation, The driving mechanism includes: a first electric actuator for switching the valve unit from the non-communication state to the communication state, and And a second electric actuator for switching the valve unit from the communication state to the non-communication state.
7. The liquid ejection device according to any one of claims 2 to 4, wherein, The valve unit is switched between the non-communication state and the communication state by rotation, The driving mechanism is a rotator having an eccentric cam for switching the state of the valve unit.
8. The liquid ejection device according to claim 1, wherein, The liquid ejecting apparatus further includes a driving mechanism for driving the valve unit, The driving mechanism includes: a biasing member for maintaining the valve unit in the communication state, and And an electric actuator that is electrically supplied to switch the valve unit from the communication state to the non-communication state against the biasing member.
9. The liquid ejection device according to any one of claims 1 to 5, 8, wherein, The liquid ejecting apparatus further includes a carriage on which the head is mounted, The storage unit is mounted on the carriage in a state where at least a part of the storage unit is located above the head.
10. The liquid ejection device according to claim 9, wherein, The above-mentioned carriage is moved in the scanning direction, The head ejects liquid when the carriage moves in the scanning direction.
11. The liquid ejection device according to any one of claims 1 to 5, 8, wherein, The storage unit includes: a first storage chamber And a second reservoir chamber connected to the first reservoir chamber and the head so as to be capable of flowing a liquid.
12. The liquid ejection device according to any one of claims 1 to 5, 8, wherein, The atmosphere communication path has at least one of a labyrinth structure and a semipermeable membrane.
13. The liquid ejection device according to any one of claims 1 to 5, 8, wherein, The liquid ejecting apparatus further includes: a cover movable to a covering position covering the nozzle and a separating position separating from the nozzle; A lid communication path for communicating the interior space of the lid with the outside through the lid opening port, and A cap valve unit for switching between a cap communication state in which the internal space of the cap is communicated with the outside and a cap non-communication state in which the internal space of the cap is not communicated with the outside, When the power button is operated from on to off, the cover valve unit is switched from the cover non-communication state to the cover communication state.
14. A liquid ejecting apparatus includes: A head having a nozzle for ejecting a liquid; a storage unit in which at least a part of the liquid is located above the opening of the nozzle, and the liquid forms a liquid surface and is stored; an atmosphere communication path for communicating the gas layer of the storage unit with the outside through an atmosphere opening port; A valve unit for switching between a communication state in which the gas layer of the reservoir is communicated with the outside and a non-communication state in which the gas layer of the reservoir is not communicated with the outside, and The power button is provided with a power button, The power button is operated by switching from a connection to a disconnection, and switches the liquid ejecting apparatus from a standby state to a standby state in which power supply to the drive source is stopped and an input from a user is waited, After the power button is operated from on to off, the valve unit is switched from the non-communication state to the communication state.

Description

Liquid ejecting apparatus Technical Field The present invention relates to a liquid ejecting apparatus having a head that ejects liquid supplied from a storage portion. Background As a liquid ejection device, an inkjet recording device is known. In an inkjet recording apparatus, in order to ensure the ejection stability of ink, a concave meniscus is formed in the nozzle of the head when viewed from the outside of the head. In the inkjet recording apparatus described in patent document 1, the valve body 201 opens the air inflow adjustment portion 62 in a state in which the head ejects ink. Thereby, the air flows into the ink tank 54 through the air inflow adjustment portion 62. When the ink tank 54 moves downward of the operation unit 202, the valve body 201 changes its posture by abutting against the operation unit 202, and the air inflow adjustment unit 62 is closed. Prior art literature Patent literature Patent document 1 Japanese patent laid-open No. 2002-321386 Disclosure of Invention Problems to be solved by the invention In the inkjet recording apparatus described in patent document 1, the power supply of the apparatus may be turned off in a state where the valve body 201 closes the air inflow adjustment portion 62. When the air layer of the ink tank 54 expands due to an increase in air temperature during a period when the power supply is turned off, the meniscus may be broken in the nozzle of the head. As a result, ink may leak from the nozzle of the head. The present invention has been made in view of the above circumstances, and an object thereof is to provide a liquid discharge device capable of reducing leakage of liquid from a nozzle of a head. Means for solving the problems (1) A liquid ejecting apparatus includes a head having a nozzle for ejecting a liquid, a storage unit having at least a portion located above an opening of the nozzle, the liquid forming a liquid surface and being stored in the storage unit, an atmosphere communication path for communicating a gas layer of the storage unit with the outside through an atmosphere opening, and a valve unit for bringing the atmosphere opening or the atmosphere communication path into a communication state or a non-communication state. When the power supply is turned off, the valve unit is turned on from the non-communication state to the communication state. Even if the external environment changes such as the rise of the air temperature during the off period of the power supply of the device, the leakage of the liquid from the nozzle from the head can be reduced. (2) Preferably, the liquid ejecting apparatus further includes a driving mechanism that drives the valve unit, and a controller that drives the driving mechanism to change the valve unit from the non-communication state to the communication state when the power supply is turned on to off. (3) Preferably, the controller drives the driving mechanism based on a first condition set in advance in a state where the power supply is turned off, and causes the valve unit to be in the non-communication state from the communication state. For example, if there is no change in air temperature or the like during the power off period, the valve unit is brought into a non-communication state, so that the evaporation of the liquid from the reservoir through the atmosphere opening port or the outflow of the liquid from the atmosphere opening port due to the movement of the device is reduced. (4) Preferably, the controller drives the driving mechanism based on a second condition set in advance in a state where the power supply is turned off, to change the valve unit from the non-communication state to the communication state. When the valve unit is in the non-communication state, even if the external environment changes such as an increase in air temperature, the leakage of liquid from the nozzle from the head can be reduced. (5) Preferably, the liquid ejecting apparatus further includes a carriage on which the head is mounted and which moves, a driving source which drives the carriage, and a controller which changes a state of the valve unit in association with the movement of the carriage, wherein the controller drives the driving source to change the valve unit from the non-communication state to the communication state when the power supply is turned on to off. (6) Preferably, the valve unit is rotated to change its posture to the non-communication state and the communication state, and the driving mechanism includes a first electric actuator for changing the posture of the valve unit from the non-communication state to the communication state, and a second electric actuator for changing the posture of the valve unit from the communication state to the non-communication state. (7) Preferably, the valve unit is rotated to change its posture to the non-communication state and the communication state, and the driving mechanism is a rotating machine having an eccentric cam for changing the posture of th