Inkjet recording head

Abstract

An inkjet recording head, comprising: a channel unit (2), which has a plurality of pressure chambers (14) respectively communicating with a plurality of nozzles (20) along a reference plane, and each nozzle ejects small ink droplets; Electric actuators (3; 40; 50; 55; 60), which change the volume of any one of the pressure chambers, so that a corresponding nozzle ejects small ink droplets, wherein the piezoelectric actuators include: respectively corresponding to a plurality of pressure chambers A plurality of individual electrodes (32; 62), a common electrode (34; 44; 61) opposite each individual electrode, a piezoelectric layer (33; 63) interposed between the individual electrodes and the common electrode, and A plurality of electric wires (35; 65) respectively connected to a plurality of independent electrodes to respectively provide driving voltages to the independent electrodes, and wherein viewed from a direction perpendicular to the reference plane, connected to at least one first pressure chamber corresponding to the pressure chamber A portion (A; C) of at least one wire of at least one first individual electrode of the individual electrodes overlaps a portion of at least one second pressure chamber of a pressure chamber different from the at least one first pressure chamber.

Description

[0001] This application is based on Japanese Patent Application No. 2004-169280 filed on June 8, 2004, the contents of which are incorporated herein by reference. technical field

[0002] The present invention relates to an inkjet recording head that ejects ink to a recording medium and thereby performs recording on the medium. Background technique

[0003] Patent Document 1 (Japanese Patent Application Laid-Open No. 2003-159798) or Patent Document 2 (Japanese Patent No. 3267937 and its corresponding US Patent No. 6471342) discloses an inkjet recording head which ejects ink to a recording medium and thereby Record on this medium. The disclosed inkjet recording head includes: a channel unit having a plurality of pressure chambers respectively communicating with a plurality of nozzles; and a piezoelectric actuator selectively changing the volume or volume of any one or more pressure chambers. respective volumes. The piezoelectric actuator includes a plurality of independent ...

Examples

Embodiment Construction

[0022] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Such as figure 1 As shown, an ink jet recording head 1 as an embodiment of the present invention includes a channel unit 2 in which a plurality of ink channels are formed; and a piezoelectric actuator 3 stacked on the upper surface of the channel unit 2 .

[0023] First, the channel unit 2 is described in detail. figure 2 yes figure 1 A schematic plan view of the right half of the inkjet recording head shown in ; image 3 yes figure 1 A schematic plan view of the right half of channel unit 2 represented in ; Figure 4 yes figure 2 A cross-sectional view of the inkjet recording head 1 along line 4-4; Figure 5 yes figure 2 A cross-sectional view of the ink jet recording head 1 along line 5-5. as in Figure 2-5 As shown, the channel unit 2 comprises a cavity sheet 10, a base sheet 11, a manifold sheet 12 and a nozzle sheet 13 stacked and b...

[0001] This application is based on Japanese Patent Application No. 2004-169280 filed on June 8, 2004, the contents of which are incorporated herein by reference. technical field

[0002] The present invention relates to an inkjet recording head that ejects ink to a recording medium and thereby performs recording on the medium. Background technique

[0003] Patent Document 1 (Japanese Patent Application Laid-Open No. 2003-159798) or Patent Document 2 (Japanese Patent No. 3267937 and its corresponding US Patent No. 6471342) discloses an inkjet recording head which ejects ink to a recording medium and thereby Record on this medium. The disclosed inkjet recording head includes: a channel unit having a plurality of pressure chambers respectively communicating with a plurality of nozzles; and a piezoelectric actuator selectively changing the volume or volume of any one or more pressure chambers. respective volumes. The piezoelectric actuator includes a plurality of independent ...

Examples

Embodiment Construction

[0022] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Such as figure 1 As shown, an ink jet recording head 1 as an embodiment of the present invention includes a channel unit 2 in which a plurality of ink channels are formed; and a piezoelectric actuator 3 stacked on the upper surface of the channel unit 2 .

[0023] First, the channel unit 2 is described in detail. figure 2 yes figure 1 A schematic plan view of the right half of the inkjet recording head shown in ; image 3 yes figure 1 A schematic plan view of the right half of channel unit 2 represented in ; Figure 4 yes figure 2 A cross-sectional view of the inkjet recording head 1 along line 4-4; Figure 5 yes figure 2 A cross-sectional view of the ink jet recording head 1 along line 5-5. as in Figure 2-5 As shown, the channel unit 2 comprises a cavity sheet 10, a base sheet 11, a manifold sheet 12 and a nozzle sheet 13 stacked and b...

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