Liquid discharge head, liquid discharge unit, and liquid discharge apparatus

A liquid discharge head comprising:

• a nozzle hole from which a liquid is dischargeable in a discharge direction;
• a liquid chamber in communication with the nozzle hole;
• a needle valve movable in the discharge direction to be separatable from or contactable with the nozzle hole to open or close the nozzle hole;
• a driver to move the needle valve in the discharge direction;
• a housing having:
• the liquid chamber;
• and
• a housing chamber housing the needle valve and the driver;
• a sheet member having a shape of a sheet and a flexibility to deform in the discharge direction, the sheet member including:
• an inner circumference fitted to an outer circumference of the needle valve;
• and
• a rim secured to the housing, and
• a press member, wherein
• the sheet member is between the needle valve and the housing in a transverse direction orthogonal to the discharge direction to restrict a position of the needle valve in the transverse direction,
• the whole of the sheet member is disposed inside the housing chamber, and
• the press member presses the rim of the sheet member to an inner wall of the housing chamber in a direction opposite to the discharge direction to secure the rim of the sheet member.