# US 12,213,850 B2 · Holder assembly for electric toothbrush and electric toothbrush > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,213,850 B2 - Document ID: US12213850B2 - Status: Granted - Kind: B2 - Application number: 18/647,787 - Filed: 2024-04-26 - Published: 2024-11-07 - Granted: 2025-02-04 - Earliest claimed: 2023-05-06 - Applicants: Shenzhen Shuye Technology Co., Ltd. - Inventors: Hongxin Ye - Web page: https://patentgrep.com/patent/US12213850B2 ## CPC - A61C 17/225: {Handles or details thereof} - A61C 17/34: driven by electric motor - F16F 15/04: using elastic means (single elements or their attachment F16F1/00 - F16F13/00); {(F16F15/023, F16F15/03 take precedence)} - Y02E 60/10: Energy storage using batteries - 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) - F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A holder assembly for an electric toothbrush and an electric toothbrush. The holder assembly includes: a holder body and an elastic cushioning member. The holder body includes a main body portion and a connection structure connected to each other; the connection structure includes an insertion mating portion. The elastic cushioning member includes a mounting cylinder; the mounting cylinder includes a motor cushioning portion; the motor cushioning portion and the insertion mating portion are insertion-connected and fixed in an axial direction of the mounting cylinder. The motor cushioning portion includes a peripheral cushioning surface and an axial cushioning surface; the insertion mating portion includes a peripheral mating surface and an axial mating surface, the peripheral mating surface abuts against and is mated with the peripheral cushioning surface around the axial direction, and the axial mating surface abuts against and is mated with the axial cushioning surface around the axial direction. ## Claims ### Claim 1 A holder assembly, for an electric toothbrush, comprising: a holder body, comprising a main body portion and a connection structure that are connected to each other; wherein the main body portion defines a battery mounting compartment, and the connection structure comprises an insertion mating portion; and an elastic cushioning member, comprising a mounting cylinder; wherein a motor mounting cavity is defined in the mounting cylinder, and the mounting cylinder comprises a motor cushioning portion; the motor cushioning portion and the insertion mating portion are insertion-connected and fixed in an axial direction of the mounting cylinder, for connecting the holder body and the elastic cushioning member; wherein the motor cushioning portion comprises a peripheral cushioning surface and an axial cushioning surface; the insertion mating portion comprises a peripheral mating surface and an axial mating surface, wherein the peripheral mating surface abuts against and is mated with the peripheral cushioning surface around the axial direction of the mounting cylinder, and the axial mating surface abuts against and is mated with the axial cushioning surface around the axial direction of the mounting cylinder; wherein the insertion mating portion comprises a plurality of insertion protrusions spaced along a peripheral direction of the mounting cylinder, and a first insertion slot is defined between each adjacent two of the plurality of insertion protrusions; bottom walls of a plurality of the first insertion slots and end walls of the plurality of insertion protrusions form the axial mating surface; side walls of the plurality of first insertion slots and side walls of the plurality of insertion protrusions form the peripheral mating surface; the motor cushioning portion comprises a plurality of second insertion slots defined on an end wall of the mounting cylinder facing the connection structure, the plurality of second insertion slots being spaced apart along the peripheral direction of the mounting cylinder; a cushioning protrusion is arranged between each adjacent two of the plurality of second insertion slots; bottom walls of the plurality of second insertion slots and end walls of a plurality of the cushioning protrusions form the axial cushioning surface; side walls of the plurality of second insertion slots and side walls of the plurality of cushioning protrusions form the peripheral cushioning surface; the plurality of cushioning protrusions are in one-to-one correspondence with and adapted to be insertion-connected and fixed with the plurality of first insertion slots; the plurality of insertion protrusions are in one-to-one correspondence with and adapted to be insertion-connected and fixed with the plurality of second insertion slots. ### Claim 2 (depends on 1) The holder assembly according to claim 1, wherein the mounting cylinder further comprises an inner enclosure wall, the inner enclosure wall enclosing to define the motor mounting cavity; the plurality of cushioning protrusions are disposed on an outer peripheral wall of the inner enclosure wall, and the inner enclosure wall is embedded in an inner periphery of the insertion mating portion. ### Claim 3 (depends on 2) The holder assembly according to claim 2, wherein the connection structure further comprises a connection ring and a limiting flange, the connection ring being connected to an end of the insertion mating portion back away from the mounting cylinder; the limiting flange is connected to an inner wall surface of the connection ring; the inner enclosure wall protrudes out of the plurality of cushioning protrusions toward a peripheral edge of the main body portion to be embedded in the inner wall surface of the connection ring and to abut against the limiting flange. ### Claim 4 (depends on 2) The holder assembly according to claim 2, wherein an inner wall surface of the inner enclosure wall is arranged with a plurality of limiting convex bars extending along the axial direction of the mounting cylinder, the plurality of limiting convex bars being spaced apart along a peripheral direction of the inner enclosure wall; a protruding height of each limiting convex bar gradually decreases from the mounting cylinder to the main body portion. ### Claim 5 (depends on 2) The holder assembly according to claim 2, wherein an inner wall surface of the inner enclosure wall is arranged with a peripheral limiting portion for limiting a rotation of a motor about an axis of the motor. ### Claim 6 (depends on 1) The holder assembly according to claim 1, wherein for each of at least one of the plurality of cushioning protrusions, a width of the cushioning protrusion in the peripheral direction of the mounting cylinder is greater than a width of a corresponding insertion protrusion adjacent to a corresponding cushioning protrusion in a peripheral direction of a connection ring. ### Claim 7 (depends on 6) The holder assembly according to claim 6, wherein in a peripheral direction of the connection ring, a width of an end face of each of the plurality of cushioning protrusions toward the main body portion is greater than half of a maximum width of the each of the plurality of cushioning protrusions, and a width of an end face of each of the plurality of insertion protrusions back away from the main body portion is greater than half of a maximum width of the each of the plurality of insertion protrusions. ### Claim 8 (depends on 1) The holder assembly according to claim 1, wherein the connection structure is connected to an end of the main body portion; a width of each of the plurality of cushioning protrusions in the peripheral direction of the mounting cylinder gradually decreases toward the main body portion; a width of each of the plurality of insertion protrusions in the peripheral direction of the mounting cylinder gradually decreases away from the main body portion. ### Claim 9 (depends on 1) The holder assembly according to claim 1, wherein the elastic cushioning member further comprises an elastic guide strip connected to the mounting cylinder, the elastic guide strip extending towards the main body portion along the axial direction of the mounting cylinder; the elastic guide strip is partially embedded in and protrudes out of an outer peripheral wall of the main body portion, and an outer wall surface of the elastic guide strip is arranged with a cushioning bump. ### Claim 10 (depends on 9) The holder assembly according to claim 9, wherein the elastic guide strip comprises at least two elastic guide strips spaced apart in the peripheral direction of the mounting cylinder, and each of the at least two elastic guide strips is arranged with at least two the cushioning bumps spaced apart in a length extension direction of the each of the at least two elastic guide strips; the at least two cushioning bumps are disposed around the axial direction of the mounting cylinder on an outer peripheral wall of the each of the at least two elastic guide strips. ### Claim 11 (depends on 10) The holder assembly according to claim 10, wherein the each of the at least two elastic guide strips defines an embedding slot between adjacent two of the at least two cushioning bumps, and the outer peripheral wall of the main body portion is arranged with an embedding protrusion that is adapted to the embedding slot. ### Claim 12 (depends on 10) The holder assembly according to claim 10, wherein the elastic cushioning member further comprises a first enclosing portion, a second enclosing portion, and a connection arm connecting the first enclosing portion with the second enclosing portion, that are spaced apart in the axial direction of the mounting cylinder; each of the first enclosing portion and the second enclosing portion extends along a peripheral direction of the main body portion, and the first enclosing portion, the second enclosing portion, and the connection arm are embedded in the main body portion; at least one of the first enclosing portion and the second enclosing portion is connected to the at least two elastic guide strips. ### Claim 13 (depends on 1) The holder assembly according to claim 1, wherein the holder body is injection molded integrally with the elastic cushioning member. ### Claim 14 (depends on 1) An electric toothbrush, comprising a brush handle assembly; wherein the brush handle assembly comprises a housing, a motor arranged in the housing, a battery, and the holder assembly according to claim 1; a lower end of the motor is arranged in the motor mounting cavity of the holder assembly, and the battery is arranged in the battery mounting compartment of the holder assembly. ### Claim 15 (depends on 14) The electric toothbrush according to claim 14, wherein the mounting cylinder further comprises an inner enclosure wall, the inner enclosure wall enclosing to define the motor mounting cavity; the plurality of cushioning protrusions are disposed on an outer peripheral wall of the inner enclosure wall, and the inner enclosure wall is embedded in an inner periphery of the insertion mating portion. ### Claim 16 (depends on 15) The electric toothbrush according to claim 15, wherein for each of at least one of the plurality of cushioning protrusions, a width of the cushioning protrusion in the peripheral direction of the mounting cylinder is greater than a width of a corresponding insertion protrusion adjacent to a corresponding cushioning protrusion in a peripheral direction of a connection ring. ### Claim 17 (depends on 14) The electric toothbrush according to claim 14, wherein the elastic cushioning member further comprises an elastic guide strip connected to the mounting cylinder, the elastic guide strip extending towards the main body portion along the axial direction of the mounting cylinder; the elastic guide strip is partially embedded in and protrudes out of an outer peripheral wall of the main body portion, and an outer wall surface of the elastic guide strip is arranged with a cushioning bump. ### Claim 18 (depends on 14) The electric toothbrush according to claim 14, wherein the holder body is injection molded integrally with the elastic cushioning member.