# US 11,998,413 B1 · Electric toothbrush replacement head device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,998,413 B1 - Document ID: US11998413B1 - Status: Granted - Kind: B1 - Application number: 18/513,694 - Filed: 2023-11-20 - Granted: 2024-06-04 - Earliest claimed: 2023-11-20 - Applicants: Mingfeng Li - Inventors: Mingfeng Li - Web page: https://patentgrep.com/patent/US11998413B1 ## CPC - A61C 17/222: {Brush body details, e.g. the shape thereof or connection to handle} - A46B 5/0095: {Removable or interchangeable brush heads} - A46B 9/04: {Arranged like in or} for toothbrushes - A61C 17/22: with brushes, cushions, cups, or the like (brush bodies, e.g. arrangements of the bristles A46B) - A61C 17/225: {Handles or details thereof} - A46B 3/06: by welding together bristles made of metal wires or plastic materials - A46B 13/023: {with means for inducing vibration to the bristles} - A46B 2200/1066: Toothbrush for cleaning the teeth or dentures (A61C17/16 takes precedence; bristles arrangements for toothbrushes A46B9/04) - 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 electric toothbrush replacement head device is provided, and the device includes a toothbrush replacement head body, the toothbrush replacement head body includes a toothbrush handle and a toothbrush head, the toothbrush head includes a brush assembly, the brush assembly is provided with bristles thereon, a bottom of the toothbrush handle is provided with a tail plug, the tail plug includes a tail plug seat, a lug boss, a tail plug column and an elastic sheet, the lug boss is disposed on the tail plug seat, the tail plug column is disposed on the lug boss, and the elastic sheet is disposed on an upper and middle part of the tail plug column; and the toothbrush handle is made of a bamboo material. The replacement head device with simple structure is provided to make installation and disassembly more flexible, usage more convenient, cleaning effect for teeth better, thus reducing costs. ## Claims ### Claim 1 An electric toothbrush replacement head device, comprising: a toothbrush replacement head body, wherein the toothbrush replacement head body comprises a toothbrush handle and a toothbrush head, and the toothbrush head comprises a brush assembly, the brush assembly is provided with bristles thereon, a bottom of the toothbrush handle is provided with a tail plug, the tail plug comprises a tail plug seat, a lug boss, a tail plug column, and an elastic sheet, the lug boss is disposed on the tail plug seat, the tail plug column is disposed on the lug boss, and the elastic sheet is disposed on an upper and middle part of the tail plug column; and the toothbrush handle is made of a bamboo material; and wherein the tail plug seat defines a first glue overflow groove, and the lug boss defines a second glue overflow groove. ### Claim 2 (depends on 1) The electric toothbrush replacement head device as claimed in claim 1, wherein the bottom of the toothbrush handle defines a bottom hole of toothbrush handle, and the tail plug is disposed in the toothbrush handle through the bottom hole of toothbrush handle. ### Claim 3 (depends on 1) The electric toothbrush replacement head device as claimed in claim 1, wherein the brush assembly defines implantation holes, and the brush assembly comprises fused adhesive columns. ### Claim 4 (depends on 3) The electric toothbrush replacement head device as claimed in claim 3, wherein the toothbrush head defines a brush installation groove, a size and a shape of the brush installation groove correspond to that of the brush assembly, and the brush assembly is disposed in the brush installation groove. ### Claim 5 (depends on 1) The electric toothbrush replacement head device as claimed in claim 1, wherein a back of the elastic sheet is provided with an elastic sheet protrusion. ### Claim 6 (depends on 5) The electric toothbrush replacement head device as claimed in claim 5, wherein two sides of the elastic sheet are respectively provided with films attached on the tail plug column. ### Claim 7 (depends on 6) The electric toothbrush replacement head device as claimed in claim 6, wherein the films comprise a first film and a second film, and the first film and the second film are configured to close the two sides of the elastic sheet. ### Claim 8 (depends on 1) The electric toothbrush replacement head device as claimed in claim 1, wherein a bottom of the tail plug defines a tail plug hole, an inside of the tail plug is in a hollow state, and the tail plug defines an axis installing hole therein for installing an axis of a main engine. ### Claim 9 An electric toothbrush replacement head device, comprising: a toothbrush handle; a tail plug, disposed in the toothbrush handle; a toothbrush head, disposed on an end of the toothbrush handle facing away from the tail plug, wherein the toothbrush head comprises: a brush assembly, and the brush assembly is provided with bristles thereon; wherein the tail plug comprises: a tail plug seat; a lug boss, disposed on the tail plug seat; a tail plug column, disposed on the lug boss; wherein a side surface of the tail plug column defines an opening; and an elastic sheet, disposed in the opening of the tail plug column; and films, disposed in the opening of the tail plug column and located at two sides of the elastic sheet; wherein the films and the elastic sheet are connected to close the opening; wherein the tail plug seat defines at least one first glue overflow groove, and the lug boss defines at least one second glue overflow groove. ### Claim 10 (depends on 9) The electric toothbrush replacement head device as claimed in claim 9, wherein maximum outer diameters of the tail plug seat, the lug boss and the tail plug column are sequentially decreased in that order. ### Claim 11 (depends on 9) The electric toothbrush replacement head device as claimed in claim 9, wherein the elastic sheet protrudes outwards relative to the films. ### Claim 12 (depends on 9) The electric toothbrush replacement head device as claimed in claim 9, wherein the brush assembly defines implantation holes, the bristles are respectively disposed in the implantation holes, and the brush assembly comprises fused adhesive columns. ### Claim 13 (depends on 9) The electric toothbrush replacement head device as claimed in claim 9, wherein the toothbrush head defines a brush installation groove, a size and a shape of the brush installation groove correspond to that of the brush assembly, and the brush assembly is disposed in the brush installation groove. ### Claim 14 (depends on 9) The electric toothbrush replacement head device as claimed in claim 9, wherein a bottom of the tail plug defines a tail plug hole, an inside of the tail plug is in a hollow state, and the tail plug defines an axis installing hole therein for installing an axis of a main engine. ### Claim 15 (depends on 14) The electric toothbrush replacement head device as claimed in claim 14, wherein a back of the elastic sheet is provided with an elastic sheet protrusion, and the elastic sheet protrusion is configured to compact the axis of the main engine. ### Claim 16 (depends on 9) The electric toothbrush replacement head device as claimed in claim 9, wherein the toothbrush handle is made of a bamboo material. ### Claim 17 An electric toothbrush replacement head device, comprising: a toothbrush handle; wherein the toothbrush handle is made of a bamboo material; a tail plug, disposed in a bottom of the toothbrush handle; a toothbrush head, disposed on an end of the toothbrush handle facing away from the tail plug, wherein the toothbrush head comprises: a brush assembly, and the brush assembly is provided with bristles thereon; wherein the tail plug comprises: a tail plug seat; a lug boss, disposed on the tail plug seat; a tail plug column, disposed on the lug boss; and an elastic sheet, disposed on an upper and middle part of the tail plug column; and wherein a back of the elastic sheet is provided with an elastic sheet protrusion, two sides of the elastic sheet are respectively provided with films attached on the tail plug column, and the films comprise a first film and a second film, and the first film and the second film are configured to close the two sides of the elastic sheet.