# US 12,765,742 B2 · Mopping module and cleaning head > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,765,742 B2 - Document ID: US12765742B2 - Status: Granted - Kind: B2 - Application number: 17/925,330 - Filed: 2021-10-08 - Published: 2023-06-22 - Granted: 2026-10-20 - Earliest claimed: 2020-10-22 - Assignees: Beijing Roborock Technology Co., Ltd. - Applicants: Beijing Roborock Technology Co., Ltd. - Inventors: Jinyi Liu; Peng Lei; Liang Qiao; Xu Li - Web page: https://patentgrep.com/patent/US12765742B2 ## CPC - A47L 11/4094: {Accessories to be used in combination with conventional vacuum-cleaning devices} - A47L 9/0606: {rigidly anchored brushes, combs, lips or pads} - A47L 9/0673: {with removable brushes, combs, lips or pads} - A47L 11/4044: {Vacuuming or pick-up tools; Squeegees} - A47L 11/4083: {Liquid supply reservoirs; Preparation of the agents, e.g. mixing devices} - A47L 11/4088: {Supply pumps; Spraying devices; Supply conduits} - A47L: DOMESTIC WASHING OR CLEANING (brushes A46B; cleaning quantities of bottles or of other hollow articles of one kind B08B9/00; laundry D06F); SUCTION CLEANERS IN GENERAL (cleaning in general B08) ## Abstract A mopping module and a cleaning head. The mopping module includes a water tank, a mopping cloth, and a water volume control mechanism. A water tank hole is provided at a bottom portion of the water tank; the water tank hole communicates with the interior of the water tank; the mopping cloth is provided outside the bottom portion of the water tank; the water volume control mechanism comprises a knob and a water control tray; and by controlling the cooperation between the water control tray and the water tank hole via the knob, the amount of water flowing from the water tank to the mopping cloth through the water tank hole is adjusted. ## Claims ### Claim 1 A mopping module, comprising: a water tank, provided with a water tank hole at a bottom of the water tank, wherein the water tank hole communicates with an interior of the water tank; a mopping cloth, provided outside the bottom of the water tank; and a water amount control mechanism, comprising a knob and a water control tray, configured to adjust an amount of water flowing from the water tank to the mopping cloth through the water tank hole by controlling cooperation of the water control tray and the water tank hole via the knob; wherein the knob comprises a knob upper-cover, a knob screw, and a knob rod which are fixedly connected in sequence, and the knob upper-cover is provided on an upper surface of the water tank, the knob rod is rotatably penetrated into the water tank, the knob rod comprises a step-shaped columnar rod body with a smaller-diameter upper portion and a larger-diameter lower portion, and the water control tray is integrally provided outside a lower end of the knob rod. ### Claim 2 (depends on 1) The mopping module according to claim 1, wherein the water tank hole comprises at least two water tank holes of different sizes, the water control tray is provided with a water control hole therethrough, an area of the water control hole is larger than or equal to an area of any one of the at least two water tank holes, and the water control hole is controlled to communicate with one of the at least two water tank holes by rotating the water control tray. ### Claim 3 (depends on 1) The mopping module according to claim 1, wherein the water tank hole comprises one water tank hole, the water control tray is provided with a water control hole therethrough, and an overlapping area between the water tank hole and the water control hole is adjustable by rotating the water control tray. ### Claim 4 (depends on 1) The mopping module according to claim 1, wherein the mopping module further comprises: a water tank bottom-cover, provided between the water tank and the mopping cloth, wherein a water passing channel is provided between the water tank bottom-cover and the water tank, a water outlet hole is provided on the water tank bottom-cover, the water tank hole communicates with the water outlet hole through the water passing channel, and the water outlet hole communicates with the mopping cloth. ### Claim 5 (depends on 4) The mopping module according to claim 4, wherein an outer lower surface of the water tank is partially recessed upwardly to form a water passing groove, the water passing channel is formed between the water tank bottom-cover and the water passing groove, the water control tray is located within the water passing channel, the water control tray is rotatable and upwardly and downwardly movable in the water passing channel, and water in the water tank is released to the mopping cloth through the water passing groove and the water outlet hole. ### Claim 6 (depends on 4) The mopping module according to claim 4, wherein when the mopping module is in a suspended state, the water outlet hole is higher than the water tank hole. ### Claim 7 (depends on 4) The mopping module according to claim 4, wherein an air inlet hole is provided on the water tank bottom-cover, and the mopping module further comprises: an air inlet pipeline, fixedly provided within the water tank and communicated with the air inlet hole, wherein the air inlet pipeline extends from the air inlet hole to an upper portion of the water tank to supply air into the water tank; wherein, the mopping cloth covers the air inlet hole, a surface of the mopping cloth is spaced from the air inlet hole by a distance in a non-water-stop state, and the surface of the mopping cloth blocks the air inlet hole in a water-stop state; an accommodating portion is provided at a position of an inner upper surface of the water tank corresponding to the air inlet pipeline, and an upper end portion of the air inlet pipeline extends into the accommodating portion in a non-contact manner; and an air outlet hole on the upper end portion of the air inlet pipeline is provided as an opening groove, and a depth of the opening groove is less than a depth of the accommodating portion; and the opening groove is cross-shaped, or is provided in a form of symmetrical notches, or is a saw teeth shape. ### Claim 8 (depends on 1) The mopping module according to claim 1, wherein an upper outer surface of the water tank is partially recessed downwardly to form a rotary accommodating groove, a side wall of the rotary accommodating groove is provided with a recessed portion, steel ball holes are symmetrically provided on both sides of the knob upper-cover, a knob steel ball spring and a knob steel ball are sequentially mounted in each of the steel ball holes from inside to outside, the knob upper-cover is embedded and mounted in the rotary accommodating groove, and the knob steel ball abuts against the recessed portion of the side wall of the rotary accommodating groove. ### Claim 9 (depends on 1) The mopping module according to claim 1, wherein an inner lower surface of the water tank is integrally provided with a water tank lower-bracket, a baffle ring is integrally provided in the water tank lower-bracket, the knob rod is sleeved with a button spring, and an upper end and a lower end of the button spring respectively abut against the knob upper-cover and the water tank lower-bracket. ### Claim 10 (depends on 9) The mopping module according to claim 9, wherein an inner hole of the baffle ring is smaller than an inner hole of the water tank lower-bracket, an upper end surface of the knob rod is provided with a threaded hole, an upper end of the knob rod passes through the inner hole of the baffle ring, and the knob screw is screwed with the threaded hole of the knob rod. ### Claim 11 (depends on 9) The mopping module according to claim 9, wherein a circular groove is provided under the knob upper-cover, the upper end of the button spring abuts against the circular groove, the lower end of the button spring abuts against the baffle ring, and the knob upper-cover and the knob rod move upwardly under an action of a restoring force of the button spring. ### Claim 12 (depends on 1) The mopping module according to claim 1, wherein the mopping module further comprises: a mopping cloth cleaning mechanism, engaged to an accommodating groove of the water tank, wherein when the mopping cloth is to be cleaned, the mopping cloth cleaning mechanism disengages from the accommodating groove to scrape and clean the mopping cloth; wherein, the mopping cloth cleaning mechanism comprises a first plate body, a second plate body, a handle, a scraping blade, and a sliding leg; wherein, the first plate body and the second plate body form an L configuration; the handle is provided on the first plate body; the scraping blade is provided on the second plate body; the handle and the scraping blade are respectively located at distal ends of the L configuration; and the sliding leg is located on the second plate body; and a sliding chute is provided on the water tank, and the sliding leg is slidable in the sliding chute, thereby enabling the mopping cloth cleaning mechanism to slide along the sliding chute and enabling the scraping blade to scrape and clean the mopping cloth. ### Claim 13 A cleaning head, comprising: a mopping module, comprising: a water tank, provided with at least one water tank hole at a bottom of the water tank, wherein the water tank hole communicates with an interior of the water tank; a mopping cloth, provided outside the bottom of the water tank; and a water amount control mechanism, comprising a knob and a water control tray, configured to adjust an amount of water flowing from the water tank to the mopping cloth through the water tank hole by controlling cooperation of the water control tray and the water tank hole via the knob, wherein the knob comprises a knob upper-cover, a knob screw, and a knob rod which are fixedly connected in sequence, and the knob upper-cover is provided on an upper surface of the water tank, the knob rod is rotatably penetrated into the water tank, the knob rod comprises a step-shaped columnar rod body with a smaller-diameter upper portion and a larger-diameter lower portion, and the water control tray is integrally provided outside a lower end of the knob rod; and a vacuum cleaner module, detachably engaged with the mopping module; wherein the vacuum cleaner module is engaged with the mopping module through a mounting portion provided on the mopping module, a bottom surface of the mopping module is in contact with a ground to be cleaned, and a bottom surface of the vacuum cleaner module is separated from the ground to be cleaned. ### Claim 14 (depends on 13) The cleaning head according to claim 13, wherein a supporting plate extends from a front end of a bottom case of a housing of the water tank outwardly and integrally, and a supporting member is provided at a bottom of the supporting plate; wherein, a height of the supporting member is less than a maximum thickness of the mopping cloth and greater than a minimum thickness of the mopping cloth. ### Claim 15 (depends on 14) The cleaning head according to claim 14, wherein the supporting member comprises: a bristle strip protruding from the bottom of the supporting plate, configured to provide a support when the vacuum cleaner module is placed on the ground to be cleaned; or one or more rollers, supporting the vacuum cleaner module to be off the ground to be cleaned. ### Claim 16 (depends on 14) The cleaning head according to claim 14, wherein the mopping cloth is in contact with the ground to be cleaned, there is a first distance between the supporting member and the ground to be cleaned, there is a second distance between the bottom surface of the vacuum cleaner module and the ground to be cleaned, and the second distance is greater than the first distance. ### Claim 17 (depends on 14) The cleaning head according to claim 14, wherein the mounting portion comprises a locking shaft, a linkage portion and a locking portion, wherein, the locking portion is provided at one end of the mounting portion and moves between a first state and a second state, the linkage portion is provided at another end of the mounting portion, and configured to move the locking portion from the first state to the second state, in the first state the locking portion locks the vacuum cleaner module, and in the second state the locking portion rotates around the locking shaft so as to unlock the vacuum cleaner module. ### Claim 18 (depends on 17) The cleaning head according to claim 17, wherein a first reset device is further provided on the mounting portion, and the first reset device resets the locking portion from the second state to the first state. ### Claim 19 (depends on 17) The cleaning head according to claim 17, wherein the vacuum cleaner module further comprises: a pedal, provided on an upper surface of the water tank, wherein the pedal is provided with a pedal inner protrusion that interacts with the linkage portion, the pedal inner protrusion is configured to drive the linkage portion to move with movement of the pedal, thereby moving the locking portion from the first state to the second state; wherein, the pedal is provided with a rotating shaft and a second reset device, the pedal is configured to move from a third state to a fourth state when depressed, and the second reset device is configured to reset the pedal from the fourth state to the third state; the third state corresponds to the first state, and the fourth state corresponds to the second state.