CN112704319A - Metal-free bristle electric toothbrush head and method of manufacture - Google Patents

Metal-free bristle electric toothbrush head and method of manufacture Download PDF

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Publication number
CN112704319A
CN112704319A CN201911022586.0A CN201911022586A CN112704319A CN 112704319 A CN112704319 A CN 112704319A CN 201911022586 A CN201911022586 A CN 201911022586A CN 112704319 A CN112704319 A CN 112704319A
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CN
China
Prior art keywords
base
injection mold
bristle
brush
handle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911022586.0A
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Chinese (zh)
Inventor
张令杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangzhou Cangjie Technology Co ltd
Original Assignee
Guangzhou Cangjie Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangzhou Cangjie Technology Co ltd filed Critical Guangzhou Cangjie Technology Co ltd
Priority to CN201911022586.0A priority Critical patent/CN112704319A/en
Publication of CN112704319A publication Critical patent/CN112704319A/en
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B3/00—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B3/00—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier
    • A46B3/02—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier by pitch, resin, cement, or other adhesives
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D3/00—Preparing, i.e. Manufacturing brush bodies
    • A46D3/04—Machines for inserting or fixing bristles in bodies
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D3/00—Preparing, i.e. Manufacturing brush bodies
    • A46D3/04—Machines for inserting or fixing bristles in bodies
    • A46D3/045—Machines for inserting or fixing bristles in bodies for fixing bristles by fusing or gluing to a body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
    • A61C17/16—Power-driven cleaning or polishing devices
    • A61C17/22—Power-driven cleaning or polishing devices with brushes, cushions, cups, or the like
    • A61C17/222—Brush body details, e.g. the shape thereof or connection to handle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14819—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being completely encapsulated
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B2200/00—Brushes characterized by their functions, uses or applications
    • A46B2200/10—For human or animal care
    • A46B2200/1066—Toothbrush for cleaning the teeth or dentures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C2045/1486—Details, accessories and auxiliary operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/42—Brushes
    • B29L2031/425—Toothbrush

Abstract

The invention relates to a metal-free brush electric toothbrush head and a manufacturing method thereof, which comprises a brush handle, wherein the brush handle is made of hard plastic and is provided with a base, the base is provided with a top surface and a bottom surface and is arranged in an upper injection mould groove of an injection mould, the top surface is convexly provided with a plurality of brush hair parts, each brush hair part comprises a groove seat and a brush hair bundle, the brush hair bundle penetrates through the injection mould and is fixedly combined in the groove seat, the top surface is penetrated with an injection hole, the other end of the brush handle is provided with a handle seat, and the radial section area of the handle seat is larger than that of the base; the rear cover is a sheet body and is arranged on the bottom surface of the base, and an injection mold with a lower injection mold groove is additionally combined; a soft plastic part which is formed by filling soft plastic into the injection mold and coating the base and the rear cover; the soft rubber part is coated on the base, so that when a user brushes teeth, the pressure of the brush handle end in the oral cavity knocking the oral cavity due to vibration is reduced, and the discomfort caused by vibration or the injury to the gum is relieved.

Description

Metal-free bristle electric toothbrush head and method of manufacture
Technical Field
The invention relates to a metal-free bristle electric toothbrush head and a manufacturing method thereof.
Background
In recent years, the metal-free electric toothbrush is a popular product in oral cavity cleaning products, wherein the metal-free toothbrush is characterized in that a bristle bundle can be fixed without implanting a metal sheet (generally copper) in a bristle area of a toothbrush head in a bristle implanting process, so that the problem of metal pollution is avoided; the main structure of the electric toothbrush comprises a grab handle and a toothbrush head, a driving motor is accommodated in the grab handle, the toothbrush head comprises a brush handle and a brush hair part, one end of the brush handle is connected with the grab handle, the other end of the brush hair part is provided with the brush hair part, the brush hair part is composed of a plurality of brush hairs, the operation mode is that the driving motor in the grab handle rotates or vibrates fast, and then the toothbrush head is driven to generate high-frequency vibration, so that the brush hairs on the toothbrush head also have the effect of fast vibration, a user can enable one end of the brush head, which is provided with the brush hair part, to go deep into the oral cavity and lean against the brush hairs on teeth or gum to move back and forth, the effect of cleaning teeth is achieved, compared with the traditional unpowered toothbrush, the toothpaste in the oral cavity can be decomposed into fine foam more fast and laborsaving, the toothpaste can go deep into the gaps, promote the blood circulation of the gum, and in addition, the user can also select the toothbrush heads with different hardness of the soft or hard bristles to be matched according to the condition of the mouth.
However, in the foregoing metal-bristle-free electric toothbrush, the handle of the toothbrush head is mostly made of rigid plastic, and after the driving motor in the handle is started, the vibration is transmitted to the handle brush of the toothbrush head through the handle, so that when a user brushes teeth, the handle is inevitably attached to the skin or the gum inside the oral cavity, and the strong vibration is likely to cause discomfort to the user, and the user who is sensitive or fragile to the gum is more likely to hurt the gum by the impact generated by the vibration.
Disclosure of Invention
In view of the disadvantages and drawbacks of the prior art, the present invention provides a metal-free electric toothbrush head, which can cover the base of the toothbrush handle with a soft rubber portion, so as to reduce the pressure and discomfort of the toothbrush handle hitting the oral cavity of the user due to vibration during the process of brushing teeth.
To achieve the above objects, the present invention provides a metal-free electric toothbrush head, comprising:
a brush handle made of hard plastic material, wherein one end of the brush handle is provided with a base, the base is a sheet body and is provided with a top surface and a bottom surface, the top surface is convexly provided with a plurality of brush hair parts, each brush hair part comprises a groove seat and a brush hair bundle, the groove seat is convexly arranged on the top surface, the brush hair bundle is provided with a plurality of brush hairs and is fixedly arranged in the groove seat in a combined manner, the top surface is provided with a glue injection hole, the glue injection hole penetrates through the base, the other end of the brush handle is provided with a handle seat, the handle seat is a rod body, and the radial cross-sectional area of the handle seat adjacent to the base is larger than that of the base;
the rear cover is a sheet body and is arranged on the bottom surface of the base, and a rib part is convexly arranged on the other side surface of the rear cover relative to the base and extends towards the axial direction of the brush handle;
a soft rubber part made of soft plastic material, the soft rubber part is covered on the base and the back cover.
To achieve the above-mentioned objects, the present invention further provides a method for manufacturing a metal-free bristle electric toothbrush head, comprising:
hard glue forming: preparing a plurality of brush holders and an injection mold which are formed by hard plastics, wherein the injection mold comprises an upper injection mold and a lower injection mold, the upper injection mold is concavely provided with a plurality of upper injection mold grooves, each upper injection mold groove is penetrated with a plurality of through holes, each brush holder is arranged in the corresponding upper injection mold groove, the top surface of the base is attached to the upper injection mold groove, and the positions of the through holes correspond to the positions of a plurality of brush hair parts;
no metal flocking: penetrating a plurality of bristle bundles through the through holes, and combining the bristle bundles with the base by using ultrasonic waves;
and (3) combining a rear cover: the rear cover is jointed to the bottom surface of the base by ultrasonic waves, a plurality of lower injection mold grooves are formed in the lower injection mold in a concave mode, a plurality of glue inlet holes are formed in the lower injection mold in a penetrating mode, the shapes of the lower injection mold grooves correspond to the shapes of the soft glue parts, the lower injection mold grooves of the lower injection mold are covered on the corresponding rear cover and attached to the upper injection mold, and the positions of the glue inlet holes correspond to the positions of the glue inlet holes;
encapsulating with soft glue: soft plastic is cast from each glue inlet hole of the lower injection mould, and the lower injection mould is filled to form a soft plastic part which is coated on the base and the rear cover.
Furthermore, the rib part is a strip-shaped body, and the rib part comprises an end face and a ring inclined face, and the soft rubber part is attached to the ring inclined face.
Furthermore, the metal-free bristle electric toothbrush head has the advantages that each groove seat penetrates through the base, the bottom surface of the base is convexly provided with a plurality of convex parts, and the plurality of convex parts and the plurality of bristle bundles are welded and fixed.
Furthermore, the metal-free bristle electric toothbrush head has a fixing portion protruding from the handle base, the fixing portion is disposed on the bottom surface of the base and has a sidewall surface, and the glue injection hole penetrates through the fixing portion.
Further, the method for manufacturing the metal-free bristle electric toothbrush head comprises the following steps:
when no metal is implanted, the plurality of protrusions are melted by ultrasonic waves and are fused with the plurality of bristle bundles.
Further, the method for manufacturing the metal-free bristle electric toothbrush head comprises the following steps:
when the soft rubber is used for rubber coating, the soft rubber part is coated and attached to the top surface and the annular side wall of the base.
Further, the method for manufacturing the metal-free bristle electric toothbrush head comprises the following steps:
when the soft rubber is used for rubber coating, the soft rubber part is coated and attached to the annular inclined surface of the rib part and the side wall surface of the fixing part, and is not attached to the end surface of the rib part.
The toothbrush has the advantages that the radial section width of the handle seat of the toothbrush handle is larger than that of the base by design, and the base is coated with the soft plastic of the soft rubber part, so that the pressure of the toothbrush handle (namely the area of the soft rubber part) in the oral cavity, which is knocked to the oral cavity of a user due to vibration, is reduced in the process of brushing teeth of the user, and the discomfort caused by vibration or the injury caused by excessive pressure on gum is further relieved; the bristle parts are distributed on the top surface of the base at intervals, so that the bristle bundles among different bristle parts have gaps, the interference among the bristle bundles can be reduced in the process of brushing teeth, the bristle bundles can be more easily inserted into tooth gaps, and the stability of the root parts of the bristle bundles can be improved and the service life of the bristle bundles can be prolonged by the design of the groove seat; the rear cover is provided with a rib part which can be used for reinforcing the structural strength after the cover body is combined with the base; the convex part is convexly arranged on the bottom surface of the base, so that the ultrasonic melting convex part can be directly combined with the bristle bundles in the metal-free bristle planting process, the bottom surface of the base is prevented from being directly damaged, and the structural integrity of the bottom surface of the base is kept; the fixed part convexly arranged on the handle seat can increase the contact area between the soft rubber part and the handle seat and improve the stability of fixing the soft rubber part.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for facilitating the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. Those skilled in the art, having the benefit of the teachings of this invention, may choose from the various possible shapes and proportional sizes to implement the invention as a matter of case.
Fig. 1 is a perspective view of the present invention.
Fig. 2 is a top exploded view of the present invention.
Fig. 3 is a bottom exploded view of the present invention.
Fig. 4 is a cross-sectional view of the present invention.
FIG. 5 is a manufacturing flow chart of the present invention.
FIG. 6 is a schematic diagram of the step of forming the hard rubber of the present invention.
FIG. 7 is a schematic diagram of the metal-free tufting step of the present invention.
Fig. 8 is a schematic view illustrating a rear cover coupling step according to the present invention.
Fig. 9 is a schematic diagram of the soft gum encapsulation step of the present invention.
Description of reference numerals:
10 brush holder 11 base
111 top surface 112 bottom surface
113 bristle part 114 groove seat
115 tuft 116 perforation
117 convex part 118 glue injection hole
12 handle holder 121 fixing part
122 side wall 20 rear cover
21 rib 211 end face
212 ring inclined plane 30 soft rubber part
31 soft rubber hole 40 injection mold
41 upper injection mold 411 upper injection mold groove
Bottom injection mold with 412 through hole 42
421 lower injection mold 422 advances gluey hole
Detailed Description
The details of the present invention can be more clearly understood in conjunction with the accompanying drawings and the description of the embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of illustration only and are not to be construed as limiting the invention in any way. Any possible variations based on the present invention may be conceived by the skilled person in the light of the teachings of the present invention, and these should be considered to fall within the scope of the present invention.
The technical means adopted by the invention to achieve the predetermined object of the invention are further described below with reference to the drawings and the preferred embodiments of the invention.
Referring to fig. 1 to 3, the metal-free bristle electric toothbrush head of the present invention includes a handle 10, a back cover 20, and a soft rubber part 30.
The brush handle 10 is made of a hard plastic material, the hard plastic material may be acrylonitrile, butadiene, styrene polymer (ABS) or polypropylene (PP), one end of the hard plastic material is formed with a base 11, the base 11 is an oval sheet and has a top surface 111 and a bottom surface 112, the top surface 111 is convexly provided with a plurality of bristle portions 113, the plurality of bristle portions 113 are mutually distributed on the top surface 111 of the base 11 at intervals, each bristle portion 113 includes a slot seat 114 and a bristle bundle 115, the bristle bundle 115 has a plurality of bristles, the slot seat 114 is convexly provided on the top surface 111 of the base 11, the top surface 111 is formed with a glue injection hole 118, and the glue injection hole 118 penetrates through the base 11; in detail, the slot 114 is surrounded by a circular wall, and a through hole 116 is formed in the circular wall through the top surface 111 of the base 11, the bottom surface 112 of the base 11 is recessed to form a slot structure, a plurality of protrusions 117 are protruded at positions between the through holes 116, and the protrusions 117 are cylindrical and spaced from each other; tuft 115 is inserted into socket 114 and is fixed in socket 114 by ultrasonic melting protrusion 117 combined with one end of tuft 115, while the annular wall of socket 114 is used to promote the support and elasticity of tuft 115 against the root of tuft 115;
a handle base 12 is formed at the other end of the brush handle 10, the handle base 12 is a rod and is used to connect with a handle (not shown in the drawings) of the electric toothbrush, the radial cross-sectional area of the handle base 12 adjacent to the base 11 is larger than that of the base 11, in detail, a step drop is formed at the end of the handle base 12 connected with the base 11, when the bristle bundle 115 faces downwards and is viewed from the side, the height of the base 11 is about half of the height of the handle base 12, but not limited to this, the height can be changed according to the user's requirement; the handle 12 is convexly provided with a fixing portion 121, the fixing portion 121 is disposed on the bottom surface 112 of the base 11 and is formed with a sidewall surface 122, that is, the fixing portion 121 is a block body extending from the handle 12 toward the base 11, the fixing portion 121 and the bottom surface 112 of the base 11 are overlapped and fixed, and the glue injection hole 118 penetrates through the fixing portion 121.
Referring to fig. 2 to 4, the rear cover 20 is a single piece and is disposed on the bottom surface 112 of the base 11, in the present embodiment, the shape of the rear cover 20 corresponds to the shape of the base 11 and is an ellipse-like piece, the periphery of the rear cover 20 facing the base 11 is attached to the periphery of the groove-like structure of the bottom surface 112 of the base 11, an inner space is formed between the rear cover 20 and the bottom surface 112 of the base 11, a rib 21 is protruded from the other side surface of the base 11, the rib 21 extends toward the axial direction of the brush handle 10, in detail, the rib 21 is a long bar and includes an end surface 211 and a ring inclined surface 212, the end surface 211 extends to the side of the handle base 12 adjacent to the fixing portion 121, the ring inclined surface 212 surrounds the periphery of the end surface 211, and forms a bulge shape in the overall view, and the rib 21 is used to strengthen the structural strength of the rear cover 20 and the.
The soft plastic portion 30 is made of a soft plastic material, and the soft plastic material may be a thermoplastic polyurethane elastomer (TPU) or a thermoplastic elastomer (TPE), the soft plastic portion 30 is wrapped on the base 11 and the rear cover 20, and in detail, after the soft plastic portion 30 is combined with the base 11 and the rear cover 20, a plurality of soft plastic holes 31 are formed by encapsulation, the soft plastic holes 31 are respectively sleeved on the outer side surfaces of the corresponding slot bases 114, and the soft plastic portion 30 is attached to the ring inclined surface 212 of the rib portion 21 and the side wall surface 122 of the fixing portion 121, but does not cover the end surface 211 of the rib portion 21, and the overall appearance of the soft plastic portion 30 forms an arc-shaped structure, when the bristle bundle 115 faces downward and is viewed from the side, the height of the soft plastic portion 30 is approximately equal to the height of the stem 12, the side surface of the soft plastic portion 30 forms an annular arc-shaped surface and extends toward the periphery to.
Referring to fig. 5 to 9, the method of manufacturing the metal bristle-free electric toothbrush head of the present invention comprises the following steps:
the method comprises the following steps: ebonite formation S1
Referring to fig. 3, 6 and 8, a plurality of brush holders 10 and an injection mold 40 are prepared, the injection mold 40 includes an upper injection mold 41 and a lower injection mold 42, the upper injection mold 41 is recessed to form a plurality of upper injection mold cavities 411, each upper injection mold cavity 411 passes through a plurality of through holes 412, the positions of the through holes 412 correspond to the positions of the bristle portions 113, each brush holder 10 is disposed in the corresponding upper injection mold cavity 411 and the top surface 111 of the base 11 is attached to the upper injection mold cavity 411, the lower injection mold 42 is recessed to form a plurality of lower injection mold cavities 421 and a plurality of glue inlet holes 422, the shape of each lower injection mold cavity 421 corresponds to the shape of the soft glue portion 30, and the position of each glue inlet hole 422 corresponds to the position of each glue inlet hole 118.
Step two: metal-free flocking S2
Referring to fig. 3, 4 and 7, the bristle bundle 115 penetrates through the through hole 412 into the groove seat 114 of the bristle part 113 to reach the protrusion 117 adjacent to the bottom surface 112 of the base 11, and the bristle bundle 115 is fixed in the groove seat 114 by combining the protrusion 117 with one end of the bristle bundle 115 by ultrasonic melting.
Step three: rear cover combination S3
Referring to fig. 3, 4 and 8, the rear cover 20 is ultrasonically bonded to the periphery of the bottom surface 112 of the base 11, and each lower injection mold cavity 421 of the lower injection mold 42 is covered on the corresponding rear cover 20 and abuts against the upper injection mold 41.
Step four: soft rubber coating S4
Referring to fig. 3, 4 and 9, soft plastic is cast from each glue inlet 422 of the lower injection mold 42, and the lower injection mold cavity 421 is filled through the glue injection hole 118 to form a soft glue portion 30 to cover the base 11 and the rear cover 20, the soft glue portion 30 covers the top surface 111 and the annular sidewall of the base 11 when covering the base 11, and the soft glue portion 30 covers the annular inclined surface 212 of the rib 21 and the sidewall surface 122 of the fixing portion 121 when covering the rear cover 20, but does not cover the end surface 211 of the rib 21.
In the foregoing process, the radial section width of the handle base 12 of the brush handle 10 of the present invention is greater than the radial section width of the base 11, and the soft plastic of the soft plastic portion 30 is used to cover the base 11, so that the pressure of the brush handle 10 (i.e. the area of the soft plastic portion 30) in the oral cavity due to the vibration hitting the oral cavity of the user is reduced during the tooth brushing process of the user, and further the discomfort caused by the vibration or the injury caused by the excessive pressure on the gum is alleviated.
In the above process, the bristle portions 113 are spaced apart from each other on the top surface 111 of the base 11, so that the bristle bundles 115 between different bristle portions 113 have gaps, interference between the bristle bundles 115 can be reduced and the bristle bundles 115 can be more easily inserted into crevices between teeth during brushing, and the design of the socket 114 can improve the stability of the root of the bristle bundles 115 and increase the service life of the bristle bundles 115.
In the above process, the rib 21 is provided on the rear cover 20 to reinforce the structural strength of the cover and the base 11 after the cover is combined.
In the foregoing process, the protrusion 117 is protruded on the bottom surface 112 of the base 11, so that the ultrasonic melting protrusion 117 can be directly combined with the bristle bundle 115 in the process of metal-free bristle planting, thereby preventing the bottom surface 112 of the base 11 from being directly damaged, and ensuring that the bottom surface 112 of the base 11 has structural integrity.
In the foregoing process, the protruding fixing portion 121 of the stem 12 can increase the contact area between the soft rubber portion 30 and the stem 12, so as to improve the stability of fixing the soft rubber portion 30.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited to the embodiments, and various changes and modifications can be made by those skilled in the art without departing from the scope of the invention.

Claims (8)

1. A metal bristle-free electric toothbrush head, comprising:
a brush handle made of hard plastic material, wherein one end of the brush handle is provided with a base, the base is a sheet body and is provided with a top surface and a bottom surface, the top surface is convexly provided with a plurality of brush hair parts, each brush hair part comprises a groove seat and a brush hair bundle, the groove seat is convexly arranged on the top surface, the brush hair bundle is provided with a plurality of brush hairs and is fixedly arranged in the groove seat in a combined manner, the top surface is provided with a glue injection hole, the glue injection hole penetrates through the base, the other end of the brush handle is provided with a handle seat, the handle seat is a rod body, and the radial cross-sectional area of the handle seat adjacent to the base is larger than that of the base;
the rear cover is a sheet body and is arranged on the bottom surface of the base, and a rib part is convexly arranged on the other side surface of the rear cover relative to the base and extends towards the axial direction of the brush handle;
a soft rubber part made of soft plastic material, the soft rubber part is covered on the base and the back cover.
2. The metal bristle-free electric toothbrush head of claim 1, wherein the rib is an elongated body and includes an end surface and a ring-shaped inclined surface, the soft rubber portion being attached to the ring-shaped inclined surface.
3. A metal-free bristle electric toothbrush head according to claim 2, wherein each of the sockets extends through the base, and a plurality of projections are formed on the bottom surface of the base and are welded to the plurality of bristle bundles.
4. The metal-free bristle electric toothbrush head according to any one of claims 1 to 3, wherein the handle base is protrudingly provided with a fixing portion, the fixing portion is provided on the bottom surface of the base and formed with a sidewall surface, and the glue injection hole penetrates through the fixing portion.
5. A method of manufacturing a metal bristle-free electric toothbrush head for use in making a metal bristle-free electric toothbrush head according to any one of claims 1 to 4, the method comprising:
hard glue forming: preparing a plurality of brush holders and an injection mold which are formed by hard plastics, wherein the injection mold comprises an upper injection mold and a lower injection mold, a plurality of upper injection mold grooves are formed in the upper injection mold in a concave manner, a plurality of through holes penetrate through each upper injection mold groove, each brush holder is arranged in the corresponding upper injection mold groove, the top surface of the base is attached to the upper injection mold groove, and the positions of the plurality of through holes correspond to the positions of the plurality of brush hair parts;
no metal flocking: penetrating a plurality of bristle bundles through the through holes, and combining the bristle bundles with the base by using ultrasonic waves;
and (3) combining a rear cover: the rear cover is jointed to the bottom surface of the base by ultrasonic waves, a plurality of lower injection mold grooves are formed in the lower injection mold in a concave mode, a plurality of glue inlet holes are formed in the lower injection mold in a penetrating mode, the shapes of the lower injection mold grooves correspond to the shapes of the soft glue parts, the lower injection mold grooves of the lower injection mold are covered on the corresponding rear cover and attached to the upper injection mold, and the positions of the glue inlet holes correspond to the positions of the glue inlet holes;
encapsulating with soft glue: soft plastic is cast from each glue inlet hole of the lower injection mould, and the lower injection mould is filled to form a soft plastic part which is coated on the base and the rear cover.
6. A method of making a metal free bristle electric toothbrush head of claim 5 wherein the plurality of projections are fused to the plurality of bristle tufts by ultrasonic fusion in the absence of metal bristles.
7. A method of manufacturing a metal free bristle electric toothbrush head according to claim 5 or 6,
when the soft rubber is used for rubber coating, the soft rubber part is coated and attached to the top surface and the annular side wall of the base.
8. A method of making a metal bristle free electric toothbrush head of claim 7,
when the soft rubber is used for rubber coating, the soft rubber part is coated and attached to the annular inclined surface of the rib part and the side wall surface of the fixing part, and is not attached to the end surface of the rib part.
CN201911022586.0A 2019-10-25 2019-10-25 Metal-free bristle electric toothbrush head and method of manufacture Pending CN112704319A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911022586.0A CN112704319A (en) 2019-10-25 2019-10-25 Metal-free bristle electric toothbrush head and method of manufacture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911022586.0A CN112704319A (en) 2019-10-25 2019-10-25 Metal-free bristle electric toothbrush head and method of manufacture

Publications (1)

Publication Number Publication Date
CN112704319A true CN112704319A (en) 2021-04-27

Family

ID=75540653

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911022586.0A Pending CN112704319A (en) 2019-10-25 2019-10-25 Metal-free bristle electric toothbrush head and method of manufacture

Country Status (1)

Country Link
CN (1) CN112704319A (en)

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