Ink jet head allowing highly dense arrangement of nozzles
AssigneeSharp Kabushiki Kaisha
InventorsHisashi Yoshimura, Kohji Tsurui, Kazuya Koyama
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Abstract
An ink jet head includes an ink supply path, a pressure chamber, an orifice and an oscillator. By bending a portion of the wall surface of the pressure chamber by oscillation of oscillator, ink is emitted. A portion of the wall surface of pressure chamber is formed by an oscillating plate of resin, and a unimorph including an elastic plate and oscillator provided on oscillating plate. Sidewalls separating the inside of pressure chamber are provided, and the dimension between the sidewalls is made shorter than the dimension of the unimorph.
Claims14
An ink jet head in which oscillation is caused in a pressure chamber communicated with a nozzle to bend a portion of a wall surface of said pressure chamber thereby to emit ink, comprising:
- an oscillating plate formed of resin provided on at least a portion of the wall surface of said pressure chamber;
- a unimorph including an elastic plate and an oscillator, provided on said oscillating plate the oscillator including electrodes distinct from the elastic plate;
- and
- said oscillator is adhered to said elastic plate by a first adhesive layer, and adhered to a terminal by a second adhesive layer, said second adhesive layer being thicker than said first adhesive layer;
- wherein
- dimension of a bending portion provided by said unimorph is larger than dimension of the wall surface of said pressure chamber corresponding to said unimorph.
Dependencies are inferred from the claim text.