Valve mechanism, liquid ejection device, and method of controlling liquid ejection device

A valve mechanism provided in a plurality of flow paths through which plural types of fluids respectively flow, the valve mechanism comprising:

• a base in which a part of each of the plurality of flow paths is formed;
• a plurality of valve sections configured to close respective ones of the plurality of flow paths, respectively;
• a pressure receiving section having flexibility;
• a first lid member that forms a first space between the first lid member and the pressure receiving section;
• and
• a lever section provided in the first space, wherein
• the lever section pushes the plurality of valve sections in a direction of closing the plurality of flow paths based on displacement of a pressure receiving section due to pressure reduction in the first space.

A control method for a liquid ejection device, the liquid ejection device including

• a liquid ejection section configured to eject liquid,
• a flow path that supplies the liquid to the liquid ejection section,
• a decompression source,
• a base on which a part of the flow path is formed,
• a valve section configured to close the flow path,
• a pressure receiving section having flexibility,
• a first lid member that forms a first space between the first lid member and the pressure receiving section,
• a lever section provided in the first space,
• a liquid chamber provided between the valve section and the liquid ejection section in the flow path, at least a part of the liquid chamber being constituted by a flexible member having flexibility,
• a biasing member configured to bias the flexible member in a direction in which volume of the liquid chamber decreases,
• a second lid member that forms a second space between the second lid member and the flexible member, and
• an atmospheric communication section configured to communicate the inside of the second space to atmosphere,
• the control method for the liquid ejection device comprising:
• drawing the liquid into the liquid chamber by displacing the flexible member in a direction in which volume of the liquid chamber increases by depressurizing the inside of the second space by the decompression source;
• displacing the pressure receiving section by depressurizing the inside of the first space by the decompression source;
• closing a part of the flow path by the lever section pushing the valve section based on displacement of the pressure receiving section;
• and
• pushing the flexible member with biasing force of the biasing member to push the liquid in the liquid chamber toward the liquid ejection section by causing the inside of the second space to communicate with atmosphere via the atmospheric communication section.

A control method for a liquid ejection device, the liquid ejection device including

• a liquid ejection section configured to eject plural types of liquid,
• a plurality of flow paths that supplies the plural types of liquid to the liquid ejection section,
• a decompression source,
• a base in which a part of each of the plurality of flow paths is formed,
• a plurality of valve sections configured to close the plurality of flow paths,
• a pressure receiving section having flexibility,
• a first lid member that forms a first space between the first lid member and the pressure receiving section,
• a lever section provided in the first space,
• a plurality of liquid chambers provided between the valve section and the liquid ejection section in the plurality of flow paths, and at least a part of which is configured by a flexible member having flexibility,
• a plurality of biasing members configured to bias the flexible member in a direction in which volume of the plurality of liquid chambers decreases,
• a second lid member configured to form a plurality of second spaces between the second lid member and the flexible member at positions corresponding to the plurality of liquid chambers, and
• an atmospheric communication section configured to communicate the inside of the plurality of second spaces to atmosphere,
• the control method comprising:
• drawing the liquid into the plurality of liquid chambers by displacing the flexible member in a direction in which volume of the plurality of liquid chambers increases by depressurizing the inside of the plurality of second space by the decompression source;
• displacing the pressure receiving section by depressurizing the inside of the first space by the decompression source, closing a part of each of the plurality of flow paths by causing the lever section pushing the plurality of valve sections based on displacement of the pressure receiving section, and
• pushing out the liquid in the plurality of liquid chambers toward the liquid ejection section by pushing the flexible member with the biasing force of the plurality of biasing members by causing the inside of the plurality of second spaces to communicate with atmosphere by the atmospheric communication section.