Liquid ejecting method, liquid ejecting head, and head cartridge using same

A liquid ejecting method using a liquid ejection head having a first liquid flow path in fluid communication with an ejection outlet, and a second liquid flow path disposed adjacent the first liquid flow path and having a bubble generating region, a movable member having a free end adjacent the ejection outlet and disposed between said first liquid flow path and said bubble generating region of said second liquid flow path, and a bubble generating means for generating a bubble disposed in said bubble generating region, the bubble generating region being disposed between side walls, and the free end of the movable member is displaced into said first liquid flow path by a pressure generated by the bubble generated by said bubble generating means to eject the liquid through the ejection outlet, comprising the steps of:

• generating a bubble in said bubble generating region by activating said bubble generating means;
• moving said movable member in a direction away from said bubble generating means by the pressure generated by said bubble generating means;
• contacting the bubble to said movable member after said moving step;
• and
• reducing the bubble and returning the movable member toward said bubble generating means.

A liquid ejecting method using a liquid ejection head having a movable member disposed faced to a bubble generating region and having a free end at a downstream side thereof with respect to a flow direction of liquid, wherein the free end of the movable member is displaced by a pressure generated by a bubble in said bubble generating region, and the pressure is directed toward an ejection outlet by the movable member to eject the liquid through the ejection outlet, comprising the steps of:

• generating a bubble in said bubble generating region by activating a bubble generating means;
• moving said movable member in a direction away from said bubble generating means by pressure generated by said bubble generating means;
• contacting the bubble to said movable member after said moving step;
• and
• reducing the bubble and returning the movable member toward said bubble generating means,
• wherein said movable member is first substantially contacted to the expanding bubble which is being guided toward the ejection outlet while said movable member is returning toward said bubble generating means.

A liquid ejecting method using a liquid ejection head having a first liquid flow path in fluid communication with an ejection outlet, and a second liquid flow path disposed adjacent the first liquid flow path and having a bubble generating region, and a movable member having a free end adjacent the ejection outlet and disposed between said first liquid flow path and said bubble generating region of said second liquid flow path, wherein a bubble is generated in said bubble generating region, and the free end of the movable member is displaced into said first liquid flow path by a pressure generated by the bubble to eject the liquid through the ejection outlet, comprising the steps of:

• generating a bubble in said bubble generating region by activating a bubble generating means;
• moving said movable member in a direction away from said bubble generating means by pressure generated by said bubble generating means;
• contacting the bubble to said movable member after said moving step;
• and
• reducing the bubble and returning the movable member toward said bubble generating means;
• wherein said movable member is first substantially contacted to the expanding bubble which is being guided toward the ejection outlet while said movable member is returning toward said bubble generating means.

A liquid ejecting head for ejecting liquid by generation of a bubble, comprising:

• a first liquid flow path in fluid communication with an ejection outlet for ejecting the liquid;
• a second liquid flow path having a heat generating element for generating a bubble in the liquid by applying heat to the liquid;
• and
• a separation wall disposed between said first liquid flow path and said second liquid flow path;
• a movable member extending from said separation wall, said movable member having a fulcrum, which is disposed upstream of a bubble generating region, and a free end of the movable member is disposed downstream of an area center of said bubble generating region, said movable member also having the free end at a side closer to the ejection outlet, said free end being displaced to said first liquid flow path on the basis of a pressure generated by a bubble generated in said second liquid flow path to transmit the pressure to the first liquid flow path, and
• wherein the bubble is contacted to said movable member after said movable member is moved away from the bubble generating region.

A print on a recording medium produced by the steps of:

• providing a liquid ejection head having a movable member disposed faced to a bubble generating region having a bubble generating means for generating a bubble, the bubble generating region being disposed between side walls, and having a free end at a downstream side thereof with respect to a flow direction of liquid, wherein the free end of the movable member is displaced by a pressure generated by the bubble generated by said bubble generating means in said bubble generating region, and the pressure is directed toward an ejection outlet by the movable member to eject the liquid through the ejection outlet;
• generating a bubble in said bubble generating region by activating said bubble generating means;
• moving said movable member in a direction away from said bubble generating means by the pressure generated by said bubble generating means;
• contacting the bubble to said movable member after said moving step;
• and then
• reducing the bubble and returning the movable member toward said bubble generating means.