LIQUID EJECTING HEAD

• US 20110205312A1
• Filed: 02/11/2011
• Published: 08/25/2011
• Est. Priority Date: 02/19/2010
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: GAO, Yue, FUKUZAWA, Yuma, MIYATA, Yoshinao
• Granted Patent: US 8,313,175 B2
• Time in Patent Office: Days
• US Class Current: 347/70
• CPC Class Codes: B41J 2/14233 of film type, deformed by bending and disposed on a diaphragm
• CPC Class Codes: B41J 2002/14362 Assembling elements of heads
• CPC Class Codes: B41J 2002/14491 Electrical connection

Abstract

A liquid ejecting head that can be of reduced size while maintaining reliability of the terminal connection is provided. According to the liquid ejecting head of the invention, individual element electrode terminals and first side individual electrode wiring terminals of a flexible cable, which are connected to the individual element electrode terminals are arrayed in a direction of a row of pressure chambers, and at least one of a side individual element electrode terminals located in a side portion in a terminal row direction X and a first side individual electrode wiring terminals connected to the side individual element electrode terminals are arranged inclined with respect to a center individual element electrode terminals located in the center portion in the terminal row direction.

Claims

1. A liquid ejecting head comprising:

a flow channel forming substrate having pressure chambers which communicate with nozzles,

a pressure generating element disposed on the flow channel forming substrate with a vibration plate interposed therebetween so as to vary a pressure of a liquid in the pressure chambers,

at least one individual electrode terminal electrically connected to an individual electrode that constitutes a part of the pressure generating element,

at least one common electrode terminal electrically connected to a common electrode that constitutes a part of the pressure generating element, and

a wiring element formed of a flexible insulation member on which wiring is provided and having wiring terminals connected to the at least one individual electrode terminal and the at least one common electrode terminal, wherein a plurality of the individual electrode terminals and a plurality of the individual wiring terminals of the wiring element which are connected to the individual electrode terminals are arrayed in a direction of a row of the pressure chambers, and wherein at least one of the individual electrode terminals located in a side portion in a terminal row direction and the individual wiring terminals connected to the individual electrode terminals are arranged inclined with respect to the individual electrode terminals located in the center portion in the terminal row direction.

2. The liquid ejecting head according to claim 1, wherein the common electrode terminals are arranged in the terminal row direction, and wherein at least one of the common electrode terminals and the common wiring terminals connected to the common electrode terminals are arranged inclined with respect to the individual electrode terminals located in the center portion in the terminal row direction, toward the terminal row direction.

3. The liquid ejecting head according to claim 1, further comprising:

a metal layer formed on the vibration plate and electrically independent from the individual electrode and the common electrode, wherein the metal layer is provided with metal layer electrode terminals, which are connected to the metal layer wiring terminals of the wiring member, on the outer side relative to the individual electrode terminals located in the side portion in the terminal row direction, and wherein at least one of the metal layer electrode terminals and the metal layer wiring terminals are arranged inclined with respect to the individual electrode terminals located in the center portion in the terminal row direction, toward the terminal row direction.

4. The liquid ejecting head according to claim 1, wherein the inclination angle of the terminal is configured to increase as the terminal becomes more distant from the individual electrode terminals located in the center portion in the terminal row direction.