Ink jet recording head
AssigneeSeiko Epson Corporation
InventorsHisashi Miyazawa, Takashi Nakamura, Osamu Nakamura, Shinji Yasukawa, Minoru Usui, Tomoaki Abe, Satoru Hosono, Takahiro Naka
Life of this patent
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Abstract
In an ink jet recording head, after a plate-shaped piezoelectric element is positioned and fixed onto a fixing plate, the piezoelectric element is sliced into a large number of vibrators and the leading ends of the vibrators are embracingly held in positioning holes 33 respectively formed in a top surface of a holding frame and are thus positioned in the surface direction thereof. Further, a cavity unit is positioned and fixed on the top surface of the holding frame.
Claims34
An ink jet recording head wherein movement of a piezoelectric element moves part of an ink flow passage substrate so as to jet out ink stored therein in the form of ink droplets, said ink jet recording head comprising:
- a fixing plate;
- a plurality of piezoelectric vibrators formed by cutting and dividing a plate-shaped piezoelectric element while said piezoelectric element is fixed on said fixing plate;
- holding means for holding at least one of said plurality of piezoelectric vibrators and said fixing plate;
- an ink flow passage substrate mounted on said holding means;
- and
- a vibrator-positioning member coupled with said ink flow passage substrate to position said piezoelectric vibrators in a displacement direction of said piezoelectric vibrators.
An ink jet recording head wherein movement of a plate-shaped piezoelectric element moves part of an ink flow passage substrate so as to jet out ink stored therein in the form of ink droplets, said ink jet recording head comprising:
- a plurality of piezoelectric vibrators formed by cutting and dividing said plate-shaped piezoelectric element;
- holding means for holding said piezoelectric vibrators;
- an ink flow passage substrate mounted on said holding means;
- and
- a vibrator-positioning member coupled with said ink flow passage substrate to position said piezoelectric vibrators in a displacement direction of said piezoelectric vibrators, said vibrator positioning member comprising selected ones of said piezoelectric vibrators which are coupled to portions of said ink flow passage substrate which do not have an ink flow passage associated therewith.
An ink jet recording head wherein movement of a plate-shaped piezoelectric element moves part of an ink flow passage substrate so as to jet out ink stored therein in the form of ink droplets, said ink jet recording head comprising:
- a plurality of piezoelectric vibrators formed by cutting and dividing said plate-shaped piezoelectric element while a front edge of said piezoelectric element is positioned and fixed relative to at least one positioning projection disposed on two sides of a fixing plate;
- holding means for holding said piezoelectric vibrators;
- an ink flow passage substrate mounted on said holding means;
- and
- a vibrator-positioning member coupled with said ink flow passage substrate to position said piezoelectric vibrators in a displacement direction of said piezoelectric vibrators.
An ink jet recording head wherein movement of a plate-shaped piezoelectric element moves part of an ink flow passage substrate so as to jet out ink stored therein in the form of ink droplets, said ink jet recording head comprising:
- a plurality of piezoelectric vibrators formed by cutting and dividing said plate-shaped piezoelectric element;
- holding means for holding said piezoelectric vibrators;
- an ink flow passage substrate mounted on said holding means, said flow passage substrate is composed of at least two layers and widths of partition walls which define ink flow passages respectively formed in said respective layers are different from one another;
- and
- a vibrator-positioning member coupled with said ink flow passage substrate to position said piezoelectric vibrators in a displacement direction of said piezoelectric vibrators.
An ink jet recording head wherein movement of a piezoelectric element moves part of an ink flow passage substrate so as to jet out ink stored therein in the form of ink droplets, said ink jet recording head comprising:
- a fixing plate;
- a plurality of piezoelectric vibrators formed by cutting and dividing a plate-shaped piezoelectric element while said piezoelectric element is fixed relative to at least one positioning projection disposed on said fixing plate;
- holding means for holding at least one of said plurality of piezoelectric vibrators and said fixing plate in a direction perpendicular to a displacement direction of said piezoelectric vibrators;
- an ink flow passage substrate mounted on said holding means;
- and
- positioning means engaged with said ink flow passage substrate and said holding means for regulating a relative position of said ink flow passage substrate with respect to said holding means.
An ink jet recording head wherein movement of a piezoelectric element moves part of an ink flow passage substrate so as to jet out ink stored therein in the form of ink droplets, said ink jet recording head comprising:
- a fixing plate;
- a plurality of piezoelectric vibrators formed by cutting and dividing a plate-shaped piezoelectric element while said piezoelectric element is fixed on said fixing plate;
- holding means for holding at least one of said plurality of piezoelectric vibrators and said fixing plate in a direction perpendicular to a displacement direction of said piezoelectric vibrators;
- an ink flow passage substrate mounted on said holding means;
- positioning means engaged with said ink flow passage substrate and said holding means for regulating a relative position of said ink flow passage substrate with respect to said holding means;
- wherein selected ones of said piezoelectric vibrators, which are coupled to portions of said ink flow passage substrate which do not have an ink flow passage associated therewith, are used as a vibrator positioning member.
An ink jet recording head wherein movement of a piezoelectric element moves part of an ink flow passage substrate so as to jet out ink stored therein in the form of ink droplets, said ink jet recording head comprising:
- a fixing plate;
- a plurality of piezoelectric vibrators formed by cutting and dividing a plate-shaped piezoelectric element while said piezoelectric element is fixed on said fixing plate;
- holding means for positioning and holding at least one of said plurality of piezoelectric vibrators and said fixing plate in a direction perpendicular to a displacement direction of said piezoelectric vibrators, positioning portions being formed on a top surface of said holding means, said positioning portions being engaged with said piezoelectric vibrators to define a relative position between said holding means and said piezoelectric vibrators;
- an ink flow passage substrate mounted on said holding means;
- and
- positioning means engaged with said ink flow passage substrate and said holding means for regulating a relative position of said ink flow passage substrate with respect to said holding means.
An ink jet recording head wherein movement of a piezoelectric element moves part of an ink flow passage substrate so as to jet out ink stored therein in the form of ink droplets, said ink jet recording head comprising:
- a fixing plate;
- a plurality of piezoelectric vibrators formed by cutting and dividing a plate-shaped piezoelectric element while said piezoelectric element is fixed on said fixing plate;
- holding means for positioning and holding at least one of said plurality of piezoelectric vibrators and said fixing plate in a direction perpendicular to a displacement direction of said piezoelectric vibrators;
- an ink flow passage substrate mounted on said holding means;
- positioning means engaged with said ink flow passage substrate and said holding means for regulating a relative position of said ink flow passage substrate with respect to said holding means;
- and
- an epoxy adhesive combined with an ultra-violet curable adhesive disposed in a connecting portion gap defined between said holding means and said fixing plate.
An ink jet recording head wherein movement of a piezoelectric element moves part of an ink flow passage substrate so as to jet out ink stored therein in the form of ink droplets, said ink jet recording head comprising:
- a fixing plate;
- a plurality of piezoelectric vibrators formed by cutting and dividing a plate-shaped piezoelectric element while said piezoelectric element is fixed on said fixing plate;
- holding means for positioning and holding at least one of said plurality of piezoelectric vibrators and said fixing plate in a direction perpendicular to a displacement direction of said piezoelectric vibrators;
- an ink flow passage substrate mounted on said holding means;
- positioning means engaged with said ink flow passage substrate and said holding means regulating a relative position of said ink flow passage substrate with respect to said holding means;
- wherein two sides of an array of pressure chambers defined in said ink flow passage substrate are wall elements and said wall elements are coupled to said positioning means to position said piezoelectric vibrators in the displacement direction of said piezoelectric vibrators.
An ink jet recording head wherein movement of a piezoelectric element moves part of an ink flow passage substrate so as to jet out ink stored therein in the form of ink droplets, said ink jet recording head comprising:
- a fixing plate;
- a plurality of piezoelectric vibrator sets, each of said sets comprising a plurality of piezoelectric vibrators formed by cutting and dividing a plate-shaped piezoelectric element while said piezoelectric element is fixed on said fixing plate;
- holding means for positioning and holding said plurality of piezoelectric vibrator sets and said fixing plate in a direction perpendicular to a displacement direction of said piezoelectric vibrators;
- an ink flow passage substrate mounted on said holding means;
- and
- positioning means engaged with said ink flow passage substrate and said holding means for regulating a relative position of said ink flow passage substrate with respect to said holding means.
Dependencies are inferred from the claim text.