# US 12,006,620 B2 · Dispensing device, dispensing assembly, and washing device having the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,006,620 B2 - Document ID: US12006620B2 - Status: Granted - Kind: B2 - Application number: 18/284,378 - Filed: 2022-04-29 - Published: 2024-03-14 - Granted: 2024-06-11 - Earliest claimed: 2021-04-30 - Assignees: Wuxi Little Swan Electric Co., Ltd. - Applicants: Wuxi Little Swan Electric Co., Ltd. - Inventors: Shibo Fu; Shulin Yan; Guangan Yu - Web page: https://patentgrep.com/patent/US12006620B2 ## CPC - D06F 39/022: {in a liquid state (D06F39/024 takes precedence)} - D06F: LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES ## Abstract A dispensing device includes a dispensing pump, a drive assembly, and a one-way transmission mechanism. The dispensing pump includes a pump housing having a liquid inlet and a liquid outlet, and a pump body. The drive assembly includes a driver movable between a first position and a second position. The one-way transmission mechanism is located between the drive assembly and the pump body. During movement of the driver from the first position to the second position, the drive assembly drives the one-way transmission mechanism to move, and the one-way transmission mechanism drives the pump body to move, to suck detergent through the liquid inlet and discharge the detergent through the liquid outlet. During movement of the driver from the second position to the first position, the drive assembly drives the one-way transmission mechanism to move, and the one-way transmission mechanism does not drive the pump body to move. ## Claims ### Claim 1 A dispensing device for dispensing detergent comprising: a dispensing pump including a pump housing and a pump body, the pump housing having a liquid inlet and a liquid outlet; a drive assembly including a driver movable between a first position and a second position; and a one-way transmission mechanism located between the drive assembly and the pump body; wherein: during a movement of the driver from the first position to the second position, the drive assembly drives the one-way transmission mechanism to move, and the one-way transmission mechanism drives the pump body to move, to suck the detergent through the liquid inlet and discharge the detergent through the liquid outlet; and during a movement of the driver from the second position to the first position, the drive assembly drives the one-way transmission mechanism to move, and the one-way transmission mechanism does not drive the pump body to move. ### Claim 2 (depends on 1) The dispensing device according to claim 1, wherein the pump body is rotatably disposed in the pump housing to form a liquid sucking region and a liquid discharge region in the pump housing, the liquid inlet corresponding to the liquid sucking region, and the liquid outlet corresponding to the liquid discharge region. ### Claim 3 (depends on 1) The dispensing device according to claim 1, wherein: the one-way transmission mechanism is a one-way rotary mechanism; during the movement of the driver from the first position to the second position, the one-way transmission mechanism is driven by the drive assembly to rotate in a first direction, and is engaged with the pump body to drive the pump body to move; and during the movement of the driver from the second position to the first position, the one-way transmission mechanism rotates in a second direction opposite to the first direction and is disengaged from the pump body. ### Claim 4 (depends on 3) The dispensing device according to claim 3, wherein: the pump body has an engagement cavity, the one-way transmission mechanism being at least partially located in the engagement cavity; when rotating in the first direction, the one-way transmission mechanism abuts against an inner wall of the engagement cavity to drive the pump body to rotate; and when rotating in the second direction, the one-way transmission mechanism is not in a transmission engagement with the inner wall of the engagement cavity. ### Claim 5 (depends on 4) The dispensing device according to claim 4, wherein: the inner wall of the engagement cavity is provided with a first engagement tooth; the one-way transmission mechanism includes a one-way transmission wheel located in the engagement cavity, the one-way transmission wheel including a transmission shaft and a second engagement tooth connected to the transmission shaft, and at least one of the first engagement tooth and the second engagement tooth having elasticity; when the one-way transmission wheel rotates in the first direction, the second engagement tooth and the first engagement tooth at least abut against each other circumferentially to drive the pump body to rotate; and when the one-way transmission wheel rotates in the second direction, the first engagement tooth is disengaged from the second engagement tooth. ### Claim 6 (depends on 5) The dispensing device according to claim 5, wherein: the second engagement tooth has elasticity and includes a connection segment and an engagement segment; the connection segment is connected to the transmission shaft and extends outwards in a radial direction; and the engagement segment is connected to an end of the connection segment away from the transmission shaft, and extends in a circumferential direction of the transmission shaft and is spaced apart from the transmission shaft. ### Claim 7 (depends on 3) The dispensing device according to claim 3, wherein: the one-way transmission mechanism includes a one-way transmission wheel and a clutch that are located in an engagement cavity, the clutch being movably arranged between an outer peripheral wall of the one-way transmission wheel and an inner peripheral wall of the engagement cavity; when the one-way transmission wheel rotates in the first direction, the clutch abuts against each of the outer peripheral wall of the one-way transmission wheel and the inner peripheral wall of the engagement cavity; and when the one-way transmission wheel rotates in the second direction, the clutch is not in a transmission engagement with at least one of the outer peripheral wall of the one-way transmission wheel and the inner peripheral wall of the engagement cavity. ### Claim 8 (depends on 7) The dispensing device according to claim 7, wherein: a movement cavity is formed between the outer peripheral wall of the one-way transmission wheel and the inner peripheral wall of the engagement cavity, the movement cavity having a radial length decreasing in the first direction, the clutch being movably arranged in the movement cavity in a circumferential direction of the one-way transmission wheel, and the clutch being elastically connected to the pump body and abutting against the outer peripheral wall of the one-way transmission wheel; when rotating in the first direction, the one-way transmission wheel drives the clutch to move in the first direction to allow the clutch to abut against a radial outer side wall of the movement cavity; and when rotating in the second direction, the one-way transmission wheel drives the clutch to move in the second direction to allow the clutch to be not in a transmission engagement with the radial outer side wall of the movement cavity. ### Claim 9 (depends on 7) The dispensing device according to claim 7, wherein: the one-way transmission mechanism includes a retainer disposed between the outer peripheral wall of the one-way transmission wheel and the inner peripheral wall of the engagement cavity, the clutch being disposed at the retainer in a swingable manner in a circumferential direction of the one-way transmission wheel and abuts against the outer peripheral wall of the one-way transmission wheel; when rotating in the first direction, the one-way transmission wheel drives the clutch to swing in the first direction to allow the clutch to abut against the inner peripheral wall of the engagement cavity; and when rotating in the second direction, the one-way transmission wheel drives the clutch to swing in the second direction to allow the clutch to be not in a transmission engagement with the inner peripheral wall of the engagement cavity. ### Claim 10 (depends on 3) The dispensing device according to claim 3, further comprising: a first transmission mechanism in transmission connection with the driver, the first transmission mechanism being located outside an engagement cavity of the pump body and connected to a one-way transmission wheel of the one-way transmission mechanism. ### Claim 11 (depends on 10) The dispensing device according to claim 10, wherein the first transmission mechanism is a gear. ### Claim 12 (depends on 10) The dispensing device according to claim 10, wherein: the drive assembly includes a second transmission mechanism connected to the driver and engaged with the first transmission mechanism; and the driver is rotatably connected to the pump housing between the first position and the second position, and the second transmission mechanism is an arc-shaped rack and extends around a rotation axis of the driver. ### Claim 13 (depends on 12) The dispensing device according to claim 12, wherein: the driver includes: a connection member rotatably connected to the pump housing; and a pressing member connected to an end of the connection member away from the pump housing; the second transmission mechanism is connected to the pressing member; and the first transmission mechanism is located in an accommodation cavity formed by the second transmission mechanism and the connection member. ### Claim 14 (depends on 1) The dispensing device according to claim 1, wherein: the drive assembly further includes an elastic restoration member; the driver is configured to move from the first position to the second position with an external force exerted by a user; and the elastic restoration member is configured to drive the driver to restore to the first position from the second position when the external force exerted by the user is removed. ### Claim 15 (depends on 1) A dispensing assembly comprising: the dispensing device according to claim 1; and a storage box for storing the detergent, the storage box having a storage cavity in communication with the liquid inlet. ### Claim 16 (depends on 15) The dispensing assembly according to claim 15, wherein the storage box is disposed at the pump housing, or is connected to the pump housing through a connection pipe. ### Claim 17 (depends on 15) The dispensing assembly according to claim 15, wherein: the storage box is disposed at the pump housing; and the storage box is detachably connected to the pump housing, or the storage box and the pump housing are integrally formed. ### Claim 18 (depends on 15) A washing device comprising the dispensing assembly according to claim 15.