Liquid discharge head and liquid discharge apparatus

A liquid discharge head comprising:

• a nozzle plate having:
• a first nozzle having a first diameter;
• and
• a second nozzle having the first diameter,
• from each of which a liquid is dischargeable from a first face of the nozzle plate;
• a channel communicating with each of the first nozzle and the second nozzle, the channel on a second face opposite to the first face of the nozzle plate;
• multiple sealing members having:
• a first sealing member having a second diameter larger than the first diameter of the first nozzle, the first sealing member to contact with the second face of the nozzle plate to close the first nozzle;
• and
• a second sealing member having a third diameter larger than the first diameter of the second nozzle and the second diameter of the first sealing member, the second sealing member to contact with the second face of the nozzle plate to close the second nozzle;
• and
• multiple needle valves including:
• a first needle valve holding the first sealing member and movable between:
• a first position at which the first sealing member contacts the second face of the nozzle plate to close the first nozzle;
• and
• a second position at which the first sealing member separated from the second face of the nozzle plate to open the first nozzle;
• and
• a second needle valve holding the second sealing member and movable between:
• a first position at which the second sealing member contacts the second face of the nozzle plate to close the second nozzle;
• and
• a second position at which the second sealing member separated from the second face of the nozzle plate to open the second nozzle,
• wherein the first nozzle has a first edge processed portion in which a first edge of the first nozzle on the second face is processed to have a first edge processing width in a radial direction of the first nozzle, and
• the second nozzle has a second edge processed portion in which a second edge of the second nozzle is processed to have a second edge processing width larger than the first edge processing width in a radial direction of the second nozzle.

A liquid discharge head comprising:

• a nozzle plate having:
• a first nozzle having a first diameter;
• and
• a second nozzle having the first diameter,
• from each of which a liquid is dischargeable from a first face of the nozzle plate;
• a channel communicating with each of the first nozzle and the second nozzle, the channel on a second face opposite to the first face of the nozzle plate;
• multiple sealing members having:
• a first sealing member on the second face of the nozzle plate surrounding the first nozzle, the first sealing member having a first opening having a second diameter larger than the first diameter of the first nozzle;
• and
• a second sealing member on the second face of the nozzle plate surrounding the second nozzle, the second sealing member having a second opening having a third diameter larger than the first diameter of the first nozzle and the second diameter of the first opening;
• and
• multiple needle valves including:
• a first needle valve movable between:
• a first position at which the first needle valve contacts the first sealing member to close the first nozzle;
• and
• a second position at which the first needle valve separated from the second sealing member to open the first nozzle;
• and
• a second needle valve movable between:
• a first position at which the second needle valve contacts the second sealing member to close the second nozzle;
• and
• a second position at which the second needle valve separated from the second sealing member to open the second nozzle,
• wherein the first needle valve has a first edge processed portion in which a first edge of the first needle valve facing the second face is processed to have a first edge processing width in a radial direction of the first needle valve, and
• the second needle valve has a second edge processed portion in which a second edge of the second needle valve is processed to have a second edge processing width larger than the first edge processing width in a radial direction of the second needle valve.