Patent ID: 7494210

Claim:
An inkjet recording head comprising: a housing member; a base member; an ink channel unit supported by the housing member and formed with a plurality of nozzle holes through which ink droplets are ejected and formed with a plurality of ink pressure chambers in a one-to-one correspondence with the plurality of nozzle holes, the ink channel unit including a diaphragm that defines part of each ink pressure chamber; a plurality of piezoelectric elements aligned in an aligned in alignment direction and provided in a one-to-one correspondence with the plurality of ink pressure chambers, each piezoelectric element having one end fixed to the base member and another end attached to the diaphragm, each piezoelectric element generating displacement in a displacement direction for deforming the diaphragm to eject ink droplets through a corresponding one of the plurality of nozzle holes; and a dynamic vibration absorber mounted on the base member, wherein the base member isolates the dynamic vibration absorber from the housing member, for damping vibrations of the base member to a resonance occurring in a frequency range less than or equal to a predetermined frequency, wherein the dynamic vibration absorber comprises a rigid member, and wherein an elastic member mounts the rigid member on the base member, wherein the base member has a first end a second end opposite to each other in the displacement direction, wherein the plurality of piezoelectric elements is fixed to the first end, wherein the rigid member is connected to the second end via the elastic member, wherein the base member has an elongated shape extending in the alignment direction and has a predetermined mass, wherein the rigid member has an elongated shape extending in the alignment direction and has a predetermined mass, wherein the elastic member comprises a plurality of flexible adhesive layers arranged in the alignment direction, each flexible adhesive layer having a predetermined thickness and an adhesive area, and wherein the rigid member is fixed to the base member via the plurality of flexible adhesive layers.