# US 11,432,918 B2 · Oral cavity washing device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,432,918 B2 - Document ID: US11432918B2 - Status: Granted - Kind: B2 - Application number: 15/807,413 - Filed: 2017-11-08 - Published: 2018-05-24 - Granted: 2022-09-06 - Earliest claimed: 2016-11-18 - Assignees: Panasonic Intellectual Property Management Co., Ltd. - Applicants: Panasonic Intellectual Property Management Co., Ltd. - Inventors: Junichi Hoshino; Tadanobu Kitagawa - Web page: https://patentgrep.com/patent/US11432918B2 ## CPC - A61C 17/14: Dental appliances for receiving spittle, with or without rinsing means therefor, e.g. dental basins, spittoons, cuspidors - A61C 17/02: Rinsing or air-blowing devices, e.g. using fluid jets {or comprising liquid medication} (combined with receptacles for spittle A61C17/14; combined with power-driven cleaning or polishing devices A61C17/16) - A61C 17/028: with intermittent liquid flow - A61C 17/227: {with reservoirs, e.g. for toothpaste} - A46B 11/001: {with integral reservoirs (A46B11/0003, A46B11/0006 take precedence)} - A61C 17/20: using ultrasonic waves - A61C: DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE (non-driven toothbrushes A46B; {tongue scrapers A61B17/24;} preparations for dentistry A61K6/00; preparations for cleaning the teeth or mouth A61K8/00, A61Q11/00) - A46B: BRUSHES (handles not integral with brushware B25G) ## Abstract An oral cavity washing device includes: a body unit including a tank which stores a washing liquid, a pump from which the washing liquid stored in the tank is discharged, and a case formed by joining a plurality of parts to each other so as to accommodate the pump; a tube connected to the body unit so as to make the discharged washing liquid flow through the tube; and a washing unit connected to the tube so as to discharge the washing liquid. The oral cavity washing device includes a seal structure having at least a first seal portion which seals a joint portion between the plurality of parts on an outer shell of the case. With such a configuration, the body unit of the oral cavity washing device can be efficiently washed. ## Claims ### Claim 1 An oral cavity washing device comprising: a body unit including a tank which stores a washing liquid, a pump from which the washing liquid stored in the tank is discharged, and a case formed by joining a plurality of parts to each other so as to accommodate the pump; a tube connected to the body unit so as to make the discharged washing liquid flow through the tube; an operation part mounted on the case; a washing unit connected to the tube so as to discharge the washing liquid; and a seal structure having at least a first seal portion which seals a joint portion between two of the plurality of parts forming the case, wherein an upper surface of the case is positioned on substantially the same plane as an upper surface of the tank in a state where the tank is mounted on the case, the upper surface of the case forms a sealed member, the plurality of parts forming the case include a case body including an upper opening and a lower opening, an upper lid provided on the case body to close the upper opening, and a bottom lid provided on the lower opening to close the lower opening, the upper lid forms the upper surface of the case, the operation part is mounted on the upper surface of the case, the operation part includes an operation panel provided on the upper opening so as to be located under the upper lid, the first seal portion is provided between an outer peripheral portion of the operation panel and the case body, the first seal portion is sandwiched between the outer peripheral portion of the operation panel and the case body, and the first seal portion seals a joint portion between the upper lid and the case body, the seal structure further includes a second seal portion which seals a joint portion between the case and the operation part and forms a waterproof seal, and wherein the upper lid is fixed to the case body such that the upper lid is non-movable relative to the case body. ### Claim 2 (depends on 1) The oral cavity washing device according to claim 1, further comprising a connecting portion which connects the body unit and the tube to each other, wherein the seal structure further includes a third seal portion which seals a joint portion between the connecting portion and the body unit. ### Claim 3 (depends on 1) The oral cavity washing device according to claim 1, wherein the tank is detachably mounted on the case and includes an outlet through which the washing liquid is made to flow, the case includes a water supply port which is connected to the outlet of the tank, and the seal structure further includes a fourth seal portion which is mounted so as to seal the water supply port of the case. ### Claim 4 (depends on 1) The oral cavity washing device according to claim 1, further comprising a power source circuit which supplies power to the pump, wherein the seal structure further includes a fifth seal portion forming a waterproof layer which covers the power source circuit. ### Claim 5 (depends on 1) The oral cavity washing device according to claim 1, further comprising a power source circuit which supplies power to the pump, and a power source cord which supplies power to the power source circuit, wherein the case includes a lead-out portion through which the power source cord is led out from an inside of the case, and the seal structure further includes a sixth seal portion which provides sealing between the case and the power source cord in the lead-out portion. ### Claim 6 (depends on 5) The oral cavity washing device according to claim 5, wherein the sixth seal portion includes a bushing which is mounted on the power source cord so as to be inserted into the lead-out portion, and a seal member which provides sealing between the bushing and the lead-out portion. ### Claim 7 (depends on 1) The oral cavity washing device according to claim 1, the washing unit is detachably mounted on the front side of the case, the tank is detachably mounted at a position different from the washing unit of the case, and the tube is arranged on a recessed arranging portion. ### Claim 8 (depends on 7) The oral cavity washing device according to claim 7, wherein a two-dimensional shape of body unit is an elliptical shape as viewed in a plan view, the tank is detachably mounted on the rear side of the case, and the washing unit is mounted on a recessed portion which is disposed on the case.