# US 12,179,484 B2 · Liquid ejecting head unit and liquid ejecting apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,179,484 B2 - Document ID: US12179484B2 - Status: Granted - Kind: B2 - Application number: 18/153,419 - Filed: 2023-01-12 - Published: 2023-07-13 - Granted: 2024-12-31 - Earliest claimed: 2022-01-13 - Assignees: Seiko Epson Corporation - Applicants: Seiko Epson Corporation - Inventors: Ryota Kinoshita; Taiki Hanagami - Web page: https://patentgrep.com/patent/US12179484B2 ## CPC - B41J 2/14: Structure thereof {only for on-demand ink jet heads} - H05K 1/0201: {Thermal arrangements, e.g. for cooling, heating or preventing overheating} - B41J 2002/14362: {Assembling elements of heads} - B41J 2002/14491: {Electrical connection} - B41J 2202/19: Assembling head units - B41J 2202/20: Modules - H05K 2201/064: Fluid cooling, e.g. by integral pipes - B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS ## Abstract A liquid ejecting head unit includes a first connector configured to be coupled to an external wiring member. The liquid ejecting head unit includes a wiring board having the first connector, a housing for the liquid ejecting head unit, the housing having an opening through which the first connector is exposed outside and having a housing space accommodating the wiring board, and a flexible member in the housing space. The flexible member separates the housing space into a first space that has at least a portion of the first connector and the opening and a second space that is larger than the first space. ## Claims ### Claim 1 A liquid ejecting head unit including a first connector configured to be coupled to an external wiring member, the liquid ejecting head unit comprising: a wiring board having the first connector; a housing for the liquid ejecting head unit, the housing having an opening through which the first connector is exposed outside and having a housing space accommodating the wiring board; and a flexible member in the housing space, wherein the flexible member separates the housing space into a first space that has at least a portion of the first connector and the opening and a second space that is larger than the first space. ### Claim 2 (depends on 1) The liquid ejecting head unit according to claim 1, wherein the wiring board defines the first space and the second space, a portion of the wiring board that defines the first space have no circuit elements, and a portion of the wiring board that defines the second space has at least one circuit element. ### Claim 3 (depends on 1) The liquid ejecting head unit according to claim 1, wherein the first connector is stacked on a first surface of the wiring board, the housing includes a first member and a second member stacked on the first member, the second member has a rib protruding toward the first surface from a wall defining the housing space, and the flexible member is sandwiched between the first surface of the wiring board and the rib. ### Claim 4 (depends on 3) The liquid ejecting head unit according to claim 3, wherein the wiring board has a second surface opposite the first surface, and the second surface of the wiring board is stacked on the first member to separate the housing space into the first space and a space having the second surface. ### Claim 5 (depends on 3) The liquid ejecting head unit according to claim 3, wherein a distal end surface of the rib has a recess extending in a direction away from the first surface, and the flexible member is located in the recess of the rib to have a portion protruding from the distal end surface of the rib. ### Claim 6 (depends on 1) The liquid ejecting head unit according to claim 1, wherein the flexible member is sandwiched between an inner circumferential surface of the opening and an outer circumferential surface of the first connector. ### Claim 7 (depends on 6) The liquid ejecting head unit according to claim 6, wherein the opening is a through hole in the housing, and when viewed in a direction in which the external wiring member is inserted into the first connector, the flexible member is sandwiched between an entire inner circumferential surface of the opening and an entire outer circumferential surface of the first connector. ### Claim 8 (depends on 6) The liquid ejecting head unit according to claim 6, wherein the first connector is stacked on a first surface of the wiring board, the housing includes a first member and a second member stacked on the first member, and the flexible member is sandwiched between the first surface of the wiring board and the inner circumferential surface of the opening and between an outer circumferential surface of the first connector and the inner circumferential surface of the opening. ### Claim 9 (depends on 1) The liquid ejecting head unit according to claim 1, further comprising a second connector to be coupled to an external wiring member, wherein the wiring board has the second connector exposed outside through the opening, and the flexible member defines the first space to have at least a portion of the second connector. ### Claim 10 (depends on 1) The liquid ejecting head unit according to claim 1, wherein, when the wiring board is viewed in plan view, the wiring board includes a body and a protrusion protruding from the body, and the protrusion has the first connector, the protrusion defines the first space, the body defines the second space, and the flexible member extends in a straight line along a border between the protrusion and the body when viewed in plan view. ### Claim 11 (depends on 1) The liquid ejecting head unit according to claim 1, wherein the flexible member has insulating properties. ### Claim 12 (depends on 1) The liquid ejecting head unit according to claim 1, wherein the housing has an inlet through which external air is drawn into the second space and an outlet through which air in the second space is discharged outside, and the opening is on an opposite side of the flexible member from the outlet in a widthwise direction of the wiring board perpendicular to a lengthwise direction. ### Claim 13 (depends on 12) A liquid ejecting apparatus comprising: the liquid ejecting head unit according to claim 12; and an external wiring member located outside the liquid ejecting head unit and coupled to the first connector. ### Claim 14 (depends on 13) The liquid ejecting apparatus according to claim 13, further comprising a fan adjacent to the outlet, wherein the fan is configured to cool the wiring board located in the housing space. ### Claim 15 (depends on 1) A liquid ejecting apparatus comprising: the liquid ejecting head unit according to claim 1; and an external wiring member located outside the liquid ejecting head unit and coupled to the first connector. ### Claim 16 (depends on 15) The liquid ejecting apparatus according to claim 15, further comprising a housing accommodating the liquid ejecting head unit, wherein the opening faces an inside of the housing of the liquid ejecting apparatus.