# US 10,478,027 B2 · Toilet seat device and toilet device equipped therewith > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,478,027 B2 - Document ID: US10478027B2 - Status: Granted - Kind: B2 - Application number: 15/431,935 - Filed: 2017-02-14 - Published: 2017-08-17 - Granted: 2019-11-19 - Earliest claimed: 2016-02-15 - Assignees: Toto Ltd. - Applicants: Toto Ltd. - Inventors: Masami Tsujita; Shoichi Tsuiki; Yuta Tanogashira - Web page: https://patentgrep.com/patent/US10478027B2 ## CPC - A47K 13/24: Parts or details not covered in, or of interest apart from, groups A47K13/02 - A47K13/22 - E03D 5/105: {touchless, e.g. using sensors} - G01S 13/56: for presence detection {(presence detection using near field arrangements G01V3/00, e.g. G01V3/08, G01V3/12; burglar, theft or intruder alarms with electrical actuation G08B13/22 - G08B13/26)} - G01S 13/88: Radar or analogous systems specially adapted for specific applications (electromagnetic prospecting or detecting of objects, e.g. near-field detection, G01V3/00) - A47K: SANITARY EQUIPMENT; ACCESSORIES THEREFOR, e.g. TOILET ACCESSORIES - E03D: WATER-CLOSETS OR URINALS WITH FLUSHING DEVICES; FLUSHING VALVES THEREFOR - G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES ## Abstract According to one embodiment, a toilet seat device includes a toilet seat, and a Doppler sensor using radio waves. An opened state of the toilet seat is sensed when approach of a user to the toilet seat is sensed based on a sensing signal outputted by the Doppler sensor. It is regarded that use is in progress for urination by the user when the toilet seat is in the opened state. In a state of being regarded that use is in progress for urination, a post-use operation is performed after sensing leaving of the user from the toilet seat based on the sensing signal. ## Claims ### Claim 1 A toilet seat device comprising: a toilet seat; a toilet seat open/close sensor which senses whether the toilet seat is in an opened state or a closed state; a Doppler sensor using radio waves; and a controller, the controller being capable of performing a room-entering determination process of sensing approach of a user to the toilet seat based on a sensing signal outputted from the Doppler sensor, a usage determination process of determining urination when it is sensed that the toilet seat is in the opened state, after the room-entering determination process, based on a sensing signal outputted by the toilet seat open/close sensor, a leaving determination process of sensing that the user leaves from the toilet seat, after the use determination process, based on the sensing signal outputted by the Doppler sensor, and an post-use operation process of outputting a flushing signal for flushing a bowl part of a toilet stool after the leaving determination process, the controller performing the post-use operation process when it is sensed by the leaving determination process that the user leaves from the toilet seat after determining urination in the usage determination process, the controller not performing the post-use operation process when it is sensed by the leaving determination process that the user leaves from the toilet seat after not determining urination in the usage determination process. ### Claim 2 (depends on 1) The device according to claim 1 further comprising a seating sensor which senses whether or not the user is seated on the toilet seat, the controller performing the post-use operation process when the toilet seat open/close sensor does not sense the opened state of the toilet seat during the usage determination process and when it is sensed by the leaving determination process that the user leaves the toilet seat after the seating sensor senses the seating of the user, the controller not performing the post-use operation process when the toilet seat open/close sensor does not sense the opened state of the toilet seat during the usage determination process and when it is sensed by the leaving determination process that the user leaves the toilet seat after the seating sensor does not sense the seating of the user. ### Claim 3 (depends on 1) The device according to claim 1, wherein, in the usage determination process, at least one of the opened state and the closed state of the toilet seat is sensed by the toilet seat open/close sensor after a prescribed period of time after the approach of the user to the toilet seat is sensed based on the sensing signal outputted by the Doppler sensor in the room-entering determination process. ### Claim 4 (depends on 1) The device according to claim 1, wherein the opened state of the toilet seat is a state in which the toilet seat is opened from the closed state after the approach of the user to the toilet seat is sensed based on the sensing signal outputted by the Doppler sensor. ### Claim 5 (depends on 3) The device according to claim 3, wherein, in the usage determination process, when the opened state of the toilet seat is sensed and it is regarded that use is in progress for urination by the user, sensing sensitivity of the Doppler sensor is maintained or lowered, and a formal determination is performed to determine whether use is in progress by the user again based on the sensing signal of the Doppler sensor. ### Claim 6 (depends on 1) The device according to claim 1, wherein the post-use operation is an operation of closing the toilet seat. ### Claim 7 (depends on 1) A toilet device comprising: a toilet stool; and the toilet seat device according to claim 1. ### Claim 8 A toilet device comprising: a toilet stool including a bowl part and being capable of flushing the bowl part; a toilet seat provided on the toilet stool; a toilet seat open/close sensor which senses whether the toilet seat is in an opened state or a closed state; a Doppler sensor using radio waves; and a controller, the controller being capable of performing a room-entering determination process of sensing approach of a user to the toilet seat based on a sensing signal outputted from the Doppler sensor, a usage determination process of determining urination when it is sensed that the toilet seat is in the opened state, after the room-entering determination process, based on a sensing signal outputted by the toilet seat open/close sensor, a leaving determination process of sensing that the user leaves from the toilet seat, after the use determination process, based on the sensing signal outputted by the Doppler sensor, and an post-use operation process of outputting a flushing signal to the toilet stool after the leaving determination process, the toilet stool flushing the bowl part when receives the flushing single, the controller performing the post-use operation process when it is sensed by the leaving determination process that the user leaves from the toilet seat after determining urination in the usage determination process, the controller not performing the post-use operation process when it is sensed by the leaving determination process that the user leaves from the toilet seat after not determining urination in the usage determination process.