Ink jet recording head with vibrating element having greater width than drive electrode

An ink jet recording head comprising:

• a vibrating plate made of ceramic;
• a pressure producing chamber forming member, made of ceramic, for forming a plurality of pressure producing chambers in rows, said vibrating plate defining one wall surface of said pressure producing chambers, said pressure producing chambers having an opening through which ink is expelled when said vibrating plate vibrates;
• arcuate members disposed on said vibrating plate at positions corresponding to said pressure producing chambers;
• and
• means, provided on said arcuate members, for flexing the vibrating plate to cause ink to be expelled through the opening, said means comprising piezoelectric vibrating elements and drive electrodes, wherein
• each one of the arcuate members has a central portion which confronts a corresponding one of the pressure producing chambers, and a peripheral edge portion, and wherein said central portion is larger in thickness than said peripheral edge portion, and the arcuate members are convex on a side of the arcuate members facing the pressure producing chambers, and
• wherein the piezoelectric vibrating elements are deposited by baking on a surface of the drive electrodes.

An ink jet recording head comprising:

• a vibrating plate made of ceramic;
• a pressure producing chamber forming member, made of ceramic, for forming a plurality of pressure producing chambers in rows, said vibrating plate defining one wall surface of said pressure producing chambers, said pressure producing chambers having an opening through which ink is expelled when said vibrating plate vibrates;
• an electrode formed on a surface of the vibrating plate in a position corresponding to at least one of the pressure producing chambers;
• and
• a piezoelectric vibrating element, one end of said piezoelectric vibrating element contacting the electrode, wherein ink is expelled through the opening by flexion of the piezoelectric vibrating element, wherein
• said electrode has an arcuate shape in section, a central portion of the electrode is larger in thickness than a peripheral edge of the electrode, and the electrode is convex on a side of the electrode facing the pressure producing chambers, and wherein
• the piezoelectric vibrating element is deposited by baking on a surface of the electrode.

An ink jet recording head comprising:

• a vibrating plate;
• a pressure producing chamber forming member for forming a plurality of pressure producing chambers in rows, said vibrating plate defining one wall surface of said pressure producing chambers, said pressure producing chambers having an opening through which ink is expelled when said vibrating plate vibrates;
• an electrode formed on a surface of the vibrating plate in a position corresponding to at least one of the pressure producing chambers;
• and
• a piezoelectric vibrating element, one end of said piezoelectric vibrating element contacting the electrode, wherein ink is expelled through the opening by flexion of the piezoelectric vibrating element;
• wherein a width W2 of the electrode is smaller than a width W1 of said at least one of the pressure producing chambers, and a width W3 of the piezoelectric vibrating element is larger than the width W2 of the electrode over the entire area of the at least one pressure producing chamber, the widths W1, W2 and W3 being measured in a direction parallel to the rows of pressure producing chambers.

An ink jet recording head comprising:

• a vibrating plate;
• a pressure producing chamber forming member for forming a plurality of pressure producing chambers in rows, said vibrating plate defining one wall surface of said pressure producing chambers, said pressure producing chambers having an opening through which ink is expelled when said vibrating plate vibrates;
• arcuate members disposed on said vibrating plate at positions corresponding to said pressure producing chambers;
• and
• means, provided on said arcuate members, for flexing the vibrating plate to cause ink to be expelled through the opening, said means comprising piezoelectric vibrating elements and drive electrodes, wherein
• each one of the arcuate members has a central portion which confronts a corresponding one of the pressure producing chambers, and a peripheral edge portion, and wherein said central portion is larger in thickness than said peripheral edge portion, and the arcuate members are convex on a side of the arcuate members facing the pressure producing chambers.

An ink jet recording head comprising:

• a vibrating plate;
• a pressure producing chamber forming member for forming a plurality of pressure producing chambers in rows, said vibrating plate defining one wall surface of said pressure producing chambers, said pressure producing chambers having an opening through which ink is expelled when said vibrating plate vibrates;
• an electrode formed on a surface of the vibrating plate in a position corresponding to at least one of the pressure producing chambers;
• and
• a piezoelectric vibrating element, one end of said piezoelectric vibrating element contacting the electrode, wherein ink is expelled through the opening by flexion of the piezoelectric vibrating element, wherein
• said electrode has an arcuate shape in section, a central portion of the electrode is larger in thickness than a peripheral edge of the electrode, and the electrode is convex on a side of the electrode facing the pressure producing chambers.