# US 10,500,856 B2 · Ink jet head and ink jet recording apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,500,856 B2 - Document ID: US10500856B2 - Status: Granted - Kind: B2 - Application number: 15/913,577 - Filed: 2018-03-06 - Published: 2018-07-12 - Granted: 2019-12-10 - Earliest claimed: 2016-04-20 - Assignees: Toshiba Tec Kabushiki Kaisha - Applicants: Toshiba Tec Kabushiki Kaisha - Inventors: Meng Fei Wong; Ryutaro Kusunoki; Shuhei Yokoyama; Ryuichi Arai - Web page: https://patentgrep.com/patent/US10500856B2 ## CPC - B41J 2/14233: {of film type, deformed by bending and disposed on a diaphragm} - B41J 2/14201: {Structure of print heads with piezoelectric elements} - B41J 2002/1437: {Back shooter} - B41J 2002/14459: {Matrix arrangement of the pressure chambers} - B41J 2002/14491: {Electrical connection} - B41J 2202/15: Moving nozzle or nozzle plate - B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS ## Abstract According to one embodiment in an inkjet head, the common electrodes for all the actuators, without overlapping with the first wiring pattern formed by individual electrodes, are connected to a second wiring pattern that passes between the outer peripheral portion of piezoelectric bodies, and a third wiring pattern that extends in a direction different from a direction of the second wiring pattern. The first wiring pattern and the third wiring pattern are electrically insulated at intersections thereof. ## Claims ### Claim 1 An ink jet head comprising: a vibrating plate having a plurality of nozzles; a plurality of actuators arranged on the vibrating plate, each of the plurality of actuators having a piezoelectric body; a plurality of individual electrodes having a first wiring pattern disposed on the vibrating plate, each of the plurality of individual electrodes being electrically connected to the piezoelectric body of each of the plurality of actuators; a common electrode having a plurality of second wiring patterns disposed on the vibrating plate so that the second wiring patterns do not overlap with the first wiring pattern, each of the plurality of second wiring patterns being electrically connected to the piezoelectric body of each of the plurality of actuators across spaces between the plurality of piezoelectric bodies; and a third wiring pattern disposed on the vibrating plate, extends in a direction different from a direction of the second wiring pattern, and is electrically connected to the second wiring pattern, wherein the second wiring pattern is connected to two current paths of any one of the plurality of actuators. ### Claim 2 (depends on 1) The ink jet head according to claim 1, further comprising an insulation layer provided between the first and third wiring pattern. ### Claim 3 (depends on 2) The ink jet head according to claim 2, wherein the second wiring pattern is respectively connected to the plurality of actuators. ### Claim 4 (depends on 3) The ink jet head according to claim 3, wherein the first wiring patterns are arranged between neighboring second wiring patterns, and a number of the first wiring patterns is equal to a number of actuators connected to one of the neighboring second wiring patterns. ### Claim 5 (depends on 4) The ink jet head according to claim 4, wherein end portions of the first wiring patterns extend in parallel and are connected to the actuator. ### Claim 6 (depends on 2) The ink jet head according to claim 2, wherein one of the plurality of actuators is surrounded by the adjacent first and third wiring pattern. ### Claim 7 (depends on 2) The ink jet head according to claim 2, wherein the plurality of actuators are surrounded by the adjacent first and third wiring pattern. ### Claim 8 (depends on 7) The ink jet head according to claim 7, wherein the plurality of actuators are arranged in a direction along which the first wiring pattern extends. ### Claim 9 (depends on 2) The ink jet head according to claim 2, wherein the individual electrodes are connected to the first wiring pattern according to address, and the common electrode is connected to the second and third wiring pattern as a ground. ### Claim 10 (depends on 1) The ink jet head according to claim 1, wherein the third wiring pattern is not electrically connected to the first wiring pattern. ### Claim 11 (depends on 10) The ink jet head according to claim 10, wherein one of the plurality of actuators is surrounded by the adjacent first and third wiring pattern. ### Claim 12 (depends on 10) The ink jet head according to claim 10, wherein the plurality of actuators are surrounded by the adjacent first and third wiring pattern. ### Claim 13 (depends on 12) The ink jet head according to claim 12, wherein the plurality of actuators are arranged in a direction along which the first wiring pattern extends. ### Claim 14 An image forming apparatus comprising: an ink jet head; a roller configured to convey a sheet; the ink jet head comprising: a vibrating plate having a plurality of nozzles; a plurality of actuators arranged on the vibrating plate, each of the plurality of actuators having a piezoelectric body; a plurality of individual electrodes having a first wiring pattern disposed on the vibrating plate, each of the plurality of individual electrodes being electrically connected to the piezoelectric body of each of the plurality of actuators; a common electrode having a plurality of second wiring patterns disposed on the vibrating plate so that the second wiring patterns do not overlap with the first wiring pattern, each of the plurality of second wiring patterns being electrically connected to the piezoelectric body of each of the plurality of actuators across spaces between the plurality of piezoelectric bodies; and a third wiring pattern disposed on the vibrating plate, extends in a direction different from a direction of the second wiring pattern, and is electrically connected to the second wiring pattern, wherein each second wiring pattern is connected to two current paths of one of the plurality of actuators. ### Claim 15 (depends on 14) The image forming apparatus according to claim 14, further comprising an insulation layer provided between the first and third wiring pattern. ### Claim 16 (depends on 15) The image forming apparatus according to claim 15, wherein the one of the plurality of actuators is surrounded by the adjacent first and third wiring pattern. ### Claim 17 (depends on 15) The image forming apparatus according to claim 15, wherein the plurality of actuators are surrounded by the adjacent first and third wiring pattern. ### Claim 18 (depends on 17) The image forming apparatus according to claim 17, wherein the plurality of actuators are arranged in a direction along which the first wiring pattern extends. ### Claim 19 (depends on 14) The image forming apparatus according to claim 14, wherein the third wiring pattern extends between two pairs of adjacent actuators in the plurality of actuators and is connected to one of the plurality of second wiring patterns that electrically connects to the two pairs of adjacent actuators. ### Claim 20 (depends on 1) The inkjet head according to claim 1, wherein the third wiring pattern extends between two pairs of adjacent actuators in the plurality of actuators and is connected to one of the plurality of second wiring patterns that electrically connects to the two pairs of adjacent actuators.