Ink jet print head

An ink jet print head comprising:

• a supporting body,
• a plurality of piezoelectric conversion elements fixed to said supporting body at base ends thereof in a cantilevered manner such that an edge of said supporting body acts as a fulcrum of said piezoelectric conversion elements,
• a nozzle plate positioned over said piezoelectric conversion elements with a gap therebetween, and
• an adhesive for fixing said nozzle plate to said piezoelectric conversion elements at said base ends of said piezoelectric conversion elements, said adhesive terminating such that said gap extends inward of said fulcrum toward said base ends of said piezoelectric conversion elements by a distance;
• wherein a groove for limiting a front end edge of said adhesive is formed in said nozzle plate at said distance backward of said vibrating fulcrum toward said base ends of said piezoelectric conversion elements, said groove extending parallel with said edge of said supporting body.

An ink jet print head comprising:

• a supporting body,
• a plurality of piezoelectric conversion elements fixed to said supporting body at base ends thereof in a cantilevered manner such that an edge of said supporting body acts as a fulcrum of said piezoelectric conversion elements,
• a nozzle plate positioned over said piezoelectric conversion elements with a gap therebetween,
• an adhesive for fixing said nozzle plate to said piezoelectric conversion elements at said base ends of said piezoelectric conversion elements, said adhesive terminating such that said gap extends inward of said fulcrum toward said base ends of said piezoelectric conversion elements by a distance;
• and
• a layer of adhesive fixing said piezoelectric conversion elements to said supporting body, a thickness of said supporting body being greater than a thickness of said layer of adhesive.

An ink jet print head, comprising:

• a supporting body,
• a plurality of piezoelectric conversion elements fixed to said supporting body at base ends thereof in a cantilevered manner such that an edge of said supporting body acts as a fulcrum of said piezoelectric conversion elements,
• a nozzle plate positioned over said piezoelectric conversion elements with a gap therebetween, and
• an adhesive for fixing said nozzle plate to said piezoelectric conversion elements at said base ends of said piezoelectric conversion elements, said adhesive terminating such that said gap extends inward of said fulcrum toward said base ends of said piezoelectric conversion elements by a distance;
• wherein a groove for limiting a front end edge of said adhesive is formed in said piezoelectric conversion elements at said distance backward of said vibrating fulcrum toward said base ends of said piezoelectric conversion elements, said groove extending parallel with said edge of said supporting body.