US20230210247A1 - Toothbrush and Anchor Wire Therefor - Google Patents

Toothbrush and Anchor Wire Therefor Download PDF

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Publication number
US20230210247A1
US20230210247A1 US18/001,107 US202018001107A US2023210247A1 US 20230210247 A1 US20230210247 A1 US 20230210247A1 US 202018001107 A US202018001107 A US 202018001107A US 2023210247 A1 US2023210247 A1 US 2023210247A1
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United States
Prior art keywords
groove
grooves
anchor
anchor wire
floor
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Pending
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US18/001,107
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English (en)
Inventor
Guoqiang Liu
Yanmei Ji
Bo Zhang
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Colgate Palmolive Co
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Colgate Palmolive Co
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Publication date
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Assigned to COLGATE-PALMOLIVE COMPANY reassignment COLGATE-PALMOLIVE COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: JI, YANMEI, LIU, GUOQIANG, ZHANG, BO
Publication of US20230210247A1 publication Critical patent/US20230210247A1/en
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    • 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
    • A46B3/16—Brushes characterised by the way in which the bristles are fixed or joined in or on the brush body or carrier by wires or other anchoring means, specially for U-shaped bristle tufts
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B9/00—Arrangements of the bristles in the brush body
    • A46B9/02—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups
    • A46B9/04—Arranged like in or for toothbrushes
    • 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
    • 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
    • A46D3/042—Machines for inserting or fixing bristles in bodies for fixing bristles using an anchor or staple

Definitions

  • the present invention is directed to a toothbrush including a head portion formed from bamboo.
  • a plurality of tuft holes are formed into the head portion and a bristle tuft is positioned within each of the tuft holes and secured by an anchor wire.
  • the anchor wire may be formed from a metal alloy that includes nickel.
  • the anchor wire includes a plurality of first grooves in its first surface and a plurality of second grooves in its second surface.
  • the grooves may have sidewalls that are perpendicular to its floor.
  • a width of the grooves may be equal to a spacing between the grooves and greater than a thickness of the anchor wire.
  • the invention may be a toothbrush comprising: a body comprising a handle portion and a head portion comprising a front surface, the body formed from bamboo; a plurality of tuft holes formed into the front surface of the head portion, each of the tuft holes comprising a floor that is recessed relative to the front surface of the head portion; a bristle tuft positioned within each of the tuft holes; an anchor wire positioned within each of the tuft holes to secure the bristle tufts to the head portion, each of the anchor wires formed from a metal alloy comprising nickel; each of the anchor wires comprising a bottom end adjacent to the floor of the tuft hole within which the anchor wire is positioned, a top end opposite the bottom end, a first anchor wire axis extending from the bottom end to the top end, and first and second surfaces extending from the bottom end to the top end; a plurality of first grooves formed into the first surface of each of the anchor wires and a plurality of second grooves formed into the second surface of each of the top end;
  • the invention may be a toothbrush comprising: a body comprising a handle portion and a head portion comprising a front surface, the body formed from a cellulosic material; a plurality of tuft holes formed into the front surface of the head portion, each of the tuft holes comprising a floor that is recessed relative to the front surface of the head portion; a bristle tuft positioned within each of the tuft holes; an anchor wire positioned within each of the tuft holes to secure the bristle tufts to the head portion, each of the anchor wires formed from a metal alloy comprising nickel; each of the anchor wires comprising a bottom end adjacent to the floor of the tuft hole within which the anchor wire is positioned, a top end opposite the bottom end, a first anchor wire axis extending from the bottom end to the top end, and first and second surfaces extending from the bottom end to the top end; a plurality of first grooves formed into the first surface of each of the anchor wires and a plurality of second grooves formed into
  • the invention may be a toothbrush comprising: a body comprising a handle portion and a head portion comprising a front surface, the body formed from bamboo; a plurality of tuft holes formed into the front surface of the head portion, each of the tuft holes comprising a floor that is recessed relative to the front surface of the head portion; a bristle tuft positioned within each of the tuft holes; an anchor wire positioned within each of the tuft holes to secure the bristle tufts to the head portion, each of the anchor wires formed from a metal alloy comprising nickel; each of the anchor wires comprising a bottom end adjacent to the floor of the tuft hole within which the anchor wire is positioned, a top end opposite the bottom end, a first anchor wire axis extending from the bottom end to the top end, first and second surfaces extending from the bottom end to the top end, and a thickness measured from the first surface to the second surface; a plurality of first grooves formed into the first surface of each of the anchor wires and a plurality of first groove
  • the invention may be an anchor wire for securing bristle tufts to a toothbrush made from a cellulosic material
  • the anchor wire comprising: an anchor body formed from a metal alloy comprising nickel, copper, and zinc, the anchor body comprising a bottom end, a top end, a first surface, and a second surface, a first anchor axis extending from the bottom end to the top end; a plurality of first grooves formed into the first surface of the anchor body and extending along a first groove axis that is perpendicular to the first anchor axis, the plurality of first grooves positioned in a spaced apart manner such that adjacent ones of the first grooves are spaced apart by a first groove to groove spacing distance, each of the first grooves having a first groove width measured in a direction parallel to the first anchor axis; a plurality of second grooves formed into the second surface of the anchor body and extending along a second groove axis that is perpendicular to the first anchor axis,
  • FIG. 1 is a front perspective view of a toothbrush in accordance with an embodiment of the present invention
  • FIG. 2 is a close-up view of area II of FIG. 1 illustrating a head portion of the toothbrush
  • FIG. 3 is a side view of the head portion of the toothbrush of FIG. 1 ;
  • FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 2 ;
  • FIG. 5 is a perspective view of an anchor wire of the toothbrush of FIG. 1 used to secure bristle tufts to the head portion;
  • FIG. 6 is a top plan view of the anchor wire of FIG. 5 ;
  • FIG. 7 is a front view of the head portion of the toothbrush of FIG. 1 with bristle tufts omitted to show anchor wires positioned within tuft holes in the head portion;
  • FIG. 7 A is a partial perspective view illustrating the orientation of the anchor wire as it is inserted into a tuft hole in the head portion of the toothbrush of FIG. 1 ;
  • FIG. 8 is a to plan view of an anchor wire in accordance with the prior art.
  • FIG. 9 is a graphical representation comparing tuft retention in the toothbrush of FIG. 1 using the anchor wire of FIGS. 6 and 7 and the anchor wire of FIG. 8 .
  • the toothbrush 100 comprises a body 101 having a handle portion 110 and a head portion 120 .
  • the body 101 is a single, unitary construction such that the handle portion 110 and the head portion 120 are part of the same monolithic component.
  • the body 101 may be formed from a cellulosic material, which as used herein includes wood and plant-based materials including bamboo.
  • the term cellulosic material as used herein specifically excludes plastic such as polypropylene, polyethylene, or the like.
  • the body 101 in some embodiments is formed from bamboo and in other embodiments is formed from wood, but in accordance with the exemplified embodiment the body 101 is not formed from nor does it comprise any amount of plastic.
  • the term cellulosic material may comprise wood materials and parts thereof and bamboo materials and parts thereof.
  • the body 101 extends from a proximal end 102 (which forms a proximal end of the handle portion 110 ) to a distal end 103 (which forms a distal end of the head portion 120 ) along a longitudinal axis A-A.
  • the handle portion 110 and the head portion 120 may be formed as an integral unitary structure, although in other embodiments it may be possible for the head portion 120 to be detachable from the handle portion 110 so that the head portion 120 can be replaced when the bristles thereon become worn.
  • a distal end 104 of the handle portion 110 is coupled directly to a proximal end 105 of the head portion 120 as a one-piece unit.
  • the handle portion 110 is the portion of the body 101 that is gripped by a user during use thereof.
  • the handle portion 110 preferably has a length and width that is selected for user comfort so that a user can clasp his/her hand around the handle portion 110 to use the toothbrush 100 for oral cavity treatment such as toothbrushing.
  • the handle portion 110 is elongated and may have various contours to enhance user comfort.
  • the side surfaces of the handle portion 110 may be wavy to allow the handle portion 110 to sit more comfortably within a user's palm and fingers.
  • the handle portion 110 may have flat front and rear surfaces and/or may include bumps, ridges, or protrusions to enhance grip.
  • the handle portion 110 may be partially or fully encased or covered with a gripping material, such as a thermoplastic elastomer, to further increase the gripability thereof.
  • a gripping material such as a thermoplastic elastomer
  • various modifications and enhancements to the handle portion 110 are possible within the scope of the invention described herein and the invention is not intended to be limited by the structure or shape of the handle portion 110 shown in the drawings in all embodiments.
  • the cellulosic material e.g., wood, bamboo
  • beeswax to prevent mold growth and prolong the life of the body 101 as it is normally used under wet conditions.
  • the head portion 120 extends from the proximal end 105 where it is connected to the handle portion 110 to the distal end 103 of the body 101 which is also the distal end of the head portion 120 .
  • the head portion 120 extends along the longitudinal axis A-A of the body 101 .
  • the head portion 120 comprises a front surface 123 , a rear surface 124 opposite the first surface 123 , and a peripheral surface 125 extending between the front and rear surfaces 123 , 124 .
  • the region where the peripheral surface 125 intersects the front surface 123 may be referred to herein as a perimeter 128 of the head portion 120 .
  • a plurality of tuft holes 130 are formed into the front surface 123 of the head portion 120 , the details of which are best shown in FIG. 4 .
  • Each of the tuft holes 130 is a hole formed into the front surface 123 of the head portion 120 having a height that is less than a thickness of the head portion 120 measured between the front and rear surfaces 123 , 124 of the head portion 120 .
  • each of the tuft holes 130 comprises a floor 131 that is recessed relative to the front surface 123 of the head portion 120 and a sidewall 132 that extends from the floor 131 to the front surface 123 of the head portion 120 .
  • the tuft holes 130 do not extend entirely through the head portion 120 to the rear surface 124 .
  • the tuft holes 130 have openings in the front surface 123 of the head portion 120 , there are no openings to the tuft holes 130 in the rear surface 124 of the head portion.
  • the tuft holes 130 have round cross-sectional areas in the exemplified embodiment, but they could take on other shapes in other embodiments.
  • the tuft holes 130 may have a diameter of between 1.2 and 2.0 mm, more specifically 1.4 and 1.8 mm, still more specifically between 1.5 and 1.7 mm, and even more specifically approximately 1.6 mm.
  • the tuft holes 130 may all have the same diameter or there may be tuft holes 130 with different diameters formed into the head portion 120 .
  • the tuft holes 130 are arranged on the front surface 123 of the head portion 120 in a spaced apart manner, each configured to receive a bristle tuft or other style tooth cleaning element as described below.
  • the particular location, arrangement, pattern, spacing, diameter, or the like of the tuft holes 130 is not to be limiting of the invention in all embodiments.
  • a plurality of bristle tufts 151 are anchored to the head portion 120 of the body 101 so that each of the bristle tufts 151 extends from the front surface 123 of the head portion 120 .
  • one of the bristle tufts 151 is positioned within each of the tuft holes 130 . Only a few of the bristle tufts 151 are labeled in FIGS. 1 - 3 in order to prevent clutter.
  • Each of the plurality of bristle tufts 151 is located within one of the tuft holes 130 in the head portion 120 and secured thereto by an anchor wire 200 .
  • the bristle tufts 151 collectively define a bristle field 150 .
  • Each of the bristle tufts 151 comprises a plurality of bristles that are clumped together to form the bristle tuft 151 , which is then inserted into a singular tuft hole formed into the head portion 120 .
  • the bristles within each of the bristle tufts 151 may be, for example without limitation, filament bristles, fiber bristles, nylon bristles, polybutylene terephthalate (PBT) bristles, spiral bristles, core-sheath bristles, tapered bristles, end-rounded bristles, or the like. Combinations of these different bristle types may be positioned in the same bristle tuft 151 or each bristle tuft 151 may contain only one bristle type.
  • the bristles may have varying diameters including 7 mm, 8 mm, and 9 mm. Some of the bristles and/or bristle tufts 151 may be infused with charcoal, bamboo salt, or other natural ingredients as may be desired to impart a benefit into an oral cavity of a user during use of the toothbrush 100 for oral hygiene activities.
  • the bristle tufts 151 are folded into a U shape and then driven into the tuft hole 130 with the anchor wire 200 .
  • the anchor wire 200 rests atop a bight portion 155 of the U shape of the bristle tufts 151 and sandwiches the bight portion 155 between the anchor wire 200 and the floor 131 of the tuft hole 130 .
  • the anchor wire 200 is not driven so far into the tuft hole 130 so as to make contact with the floor 131 , but rather the anchor wire 200 remains spaced from the floor 131 of the tuft hole 130 so that the bristles of the bristle tuft 151 can pass underneath the anchor wire 200 between the anchor wire 200 and the floor 131 of the tuft hole 130 .
  • the anchor wire 200 may become partially embedded within the material of the head portion 120 (i.e., within the sidewall 132 of the tuft hole 130 ) to secure the anchor wire 200 in place within the tuft hole 130 .
  • the tuft hole 130 has a diameter of 1.6 mm and the anchor wire 200 has a width of 2.2 mm, such that 0.3 mm on each end of the anchor wire 200 is embedded within the sidewall 132 of the tuft hole 130 within which it is positioned.
  • such embedment of the anchor wire 200 in the head portion 200 is not required in all embodiments and it may be possible to secure the anchor wire 200 to the head portion 120 via a friction fit between the edges of the anchor wire 200 and the sidewall 132 of the tuft hole 130 , using adhesives, or other technical means.
  • the anchor wire 200 holds the bristle tuft 151 in place within the tuft hole 130 .
  • tuft retention is a measure of the force required to detach the bristles of the bristle tuft 151 from the head portion 120 of the toothbrush 100 (i.e., the holding force of filament tufts in the head portion 120 of the toothbrush 100 ). Specifically, if the toothbrush 100 has poor tuft retention, then the bristles of the bristle tufts 151 will more readily become detached from the head portion 120 of the toothbrush 100 during use whereas if the toothbrush 100 has good tuft retention the bristles of the bristle tufts 151 are less likely to become detached from the head portion 120 of the toothbrush 100 during use.
  • the anchor wire 200 of the invention described herein has been specifically designed to increase tuft retention in the toothbrush 100 which is formed from a cellulosic material such as wood or bamboo.
  • the bristle tufts 151 comprising filament bristles are the only tooth cleaning elements coupled to and extending from the head portion 120 .
  • the invention is not to be so limited in all embodiments and in some alternative embodiments there may also be lamella or rubber cleaning elements including rubber bristles, elastomeric protrusions, flexible polymer protrusions, or the like extending from the head.
  • cleaning elements for cleaning, polishing, or wiping the teeth and/or soft oral tissue may be formed from other materials and provided on the head portion 120 alongside of the bristle tufts 151 .
  • the bristle field 150 formed by the plurality of bristle tufts 151 has a flat trim profile. Specifically, each of the bristle tufts 151 has the same height measured from the front surface 123 of the head portion 120 to a distal end 152 of the bristle tuft 151 . As a result, the distal ends 152 of the bristle tufts 151 collectively lie on a common plane that is parallel to the front surface 123 of the head portion 120 .
  • the invention is not to be so limited in all embodiments and in some other embodiments the bristle tufts 151 may have varying heights to create a wavy or other trim profile that is not flat and planar as shown in the exemplified embodiment.
  • the arrangement, pattern, location, position, orientation, angle, and other features related to the placement of the tuft holes 130 and the bristle tufts 151 are not to be limiting of the present invention in all embodiments and may be modified to suit a particular purpose.
  • the anchor wire 200 that may be used to secure the bristle tufts 151 within the tuft holes 130 of the toothbrush 100 will be described in greater detail.
  • the anchor wires 200 may comprise an anchor body 250 .
  • One of the anchor wires 200 is inserted within each of the tuft holes 130 that contains a bristle tuft 150 in order to secure the bristle tuft 150 within the tuft hole 130 with sufficient retention so that limited, if any, bristles of the bristle tuft 150 are removed during normal use of the toothbrush 100 .
  • the use of the anchor wires 200 for securing the bristle tufts 151 to the head portion 120 of the toothbrush 100 is commonly referred to as a staple technique.
  • the bristle tufts 151 are bent into a U shape around the anchor wire 200 to form a bristle-anchor wire subassembly.
  • the bristle-anchor wire subassembly is then placed into the tuft holes 130 .
  • the engagement between the anchor wire 200 and the head portion 120 of the toothbrush 100 (via embedment of the anchor wire 200 as described above, friction, or any other technical means) ensures that the bristle tufts 151 are retained within the tuft holes 130 .
  • the ability of the anchor wires 200 to remain in place assists with bristle retention by preventing bristles from being detached from the head portion 120 during normal use of the toothbrush 100 .
  • the anchor wires 200 may be formed from a metal alloy that comprises nickel.
  • the anchor wire 200 may be formed from a metal alloy comprising nickel, copper, and zinc.
  • the metal alloy may comprise nickel, copper, lead, and zinc.
  • the metal alloy may comprise 8-15 wt % nickel and 50-70 wt % copper.
  • the metal alloy may comprise 11-12 wt % nickel and 61-62 wt % copper.
  • the remainder of the metal alloy is formed from zinc.
  • the metal alloy may comprise copper and nickel in the noted weight percentages and other metal materials.
  • the metal alloy used to form the anchor wires 200 of the toothbrush 100 comprises at least 10 wt % nickel.
  • the metal alloy comprises nickel and specifically does not include any brass.
  • Nickel is a harder metal than brass. It has been found through experimentation by the inventors of the invention set forth herein that tuft retention is improved in a toothbrush formed from a cellulosic material such as bamboo when the anchor wire 200 described herein is formed from a metal alloy comprising nickel and excluding brass (as compared to the metal alloy comprising brass).
  • the graph shown in FIG. 9 and described below further illustrates the increased tuft retention with the anchor wire 200 formed from a metal alloy that comprises nickel.
  • the anchor wire 200 is a double sided grooved anchor having grooves on opposing major surfaces, with the grooves being square or rectangular shaped.
  • the anchor wire 200 has a generally rectangular shape, although the shape and dimensions of the tuft hole within which the anchor wire 200 is to be positioned may dictate varying the shape of the anchor wire 200 as should be appreciated.
  • the anchor wire 200 comprises a bottom end 201 , a top end 202 , a first surface 203 extending from the bottom end 201 to the top end 202 , a second surface 204 extending from the bottom end 201 to the top end 202 , a first side end 205 extending between the bottom and top ends 201 , 202 and between the first and second surfaces 203 , 204 , and a second side end 206 extending between the bottom and top ends 201 , 202 and between the first and second surfaces 203 , 204 .
  • the first and second surfaces 203 , 204 may be considered the major surfaces of the anchor wire 200 because they are the surfaces having the largest surface area.
  • the anchor wire 200 extends from the bottom end 201 to the top end 202 along a first anchor wire axis B-B and from the first side end 205 to the second side end 206 along a second anchor wire axis C-C that is perpendicular to the first anchor wire axis B-B.
  • the top and bottom ends 201 , 202 are chamfered. That is, the top end 201 comprises an end wall 281 , a first oblique wall 282 extending from the end wall 281 to the first surface 203 , and a second oblique wall 283 extending from the end wall 281 to the second surface 204 .
  • Each of the first and second oblique walls 282 , 283 intersects the end wall 281 at an oblique angle, which in the exemplified embodiment is an obtuse angle.
  • the bottom end 202 comprises an end wall 292 , a first oblique wall 292 extending from the end wall 281 to the first surface 203 , and a second oblique wall 293 extending from the end wall 291 to the second surface 204 .
  • Each of the first and second walls 292 , 293 intersects the end wall 291 at an oblique angle, which in the exemplified embodiment is an obtuse angle. such that they each include an end wall and two angled walls extending from the end wall to the first and second surfaces 203 , 204 .
  • the corner that contacts the bristles i.e., the corner between the first and second oblique walls 292 , 293 and the end wall 291 ) is not as sharp as it would be if the oblique walls 292 , 293 were omitted and the first and second surfaces 203 , 204 instead connected directly to the end wall 291 .
  • the anchor wire 200 is intended for use in a toothbrush that is made from a cellulosic material such as wood or bamboo.
  • the anchor wire 200 is positioned in the tuft hole 130 so that the bottom end 201 of the anchor wire 200 is adjacent to the floor 131 of the tuft hole 130 , although the bottom end 201 of the anchor wire 200 is spaced apart from the floor 131 of the tuft hole 130 so that the bristles can pass through the space between the anchor wire 200 and the floor 131 .
  • the top end 202 of the anchor wire 200 is recessed relative to the front surface 123 of the head portion 120 .
  • the first and second side ends 205 , 206 of the anchor wire 200 are either abutted against or embedded within the sidewalls 132 of the tuft holes 130 (best shown in FIG. 7 described below) to couple the anchor wire 200 to the head portion 120 of the toothbrush 100 .
  • the anchor wire 200 has a length L 1 measured from the bottom end 201 to the top end 202 and a width W 1 measured from the first side end 205 to the second side end 206 .
  • the width W 1 is greater than the length L 1 .
  • the width W 1 may be between 2.0 mm and 2.4 mm, and more specifically approximately 2.2 mm.
  • the length L 1 may be between 1.8 mm and 2.2 mm, and more specifically approximately 2.0 mm.
  • the anchor wire 200 also has a thickness T 1 measured from the first surface 203 to the second surface 204 .
  • the thickness T 1 is between 0.26 mm and 0.30 mm, and more specifically approximately 0.28 mm.
  • the term “approximately” as used in this sense and throughout this specification includes a tolerance (plus or minus) of 5%.
  • the length L 1 may be exactly 2.2 mm
  • the width W 1 may be exactly 2.0 mm
  • the thickness T 1 may be exactly 0.28 mm.
  • the anchor wire 200 comprises a plurality of first grooves 210 formed into the first surface 203 and a plurality of second grooves 220 formed into the second surface 204 .
  • Each of the first grooves 210 extends along a groove axis D-D (only one of which is labeled in the drawings) which is perpendicular to the first anchor wire axis B-B and parallel to the second anchor wire axis C-C.
  • each of the first and second grooves 210 , 220 extends from the first side end 205 of the anchor wire 200 to the second side end 206 of the anchor wire 200 .
  • each of the plurality of first grooves 210 and each of the plurality of second grooves 220 extend an entirety of the width W 1 of the anchor wire 200 from the first side end 205 to the second side end 206 .
  • Each of the first and second grooves 210 , 220 has a length measured in a direction of the groove axis D-D that is identical to the width W 1 of the anchor wire 200 .
  • the first and second grooves 210 , 220 extend horizontally in a direction that is parallel to the plane of the head portion 120 and perpendicular to the axis of the tuft hole 130 . This creates additional friction between the anchor wire 200 and the sidewalls 132 of the tuft hole 130 .
  • Each of the second grooves 220 is aligned with one of the first grooves 210 , as best shown in FIG. 6 .
  • any axis that is perpendicular to both of the first and second surfaces 203 , 204 of the anchor wire 200 which intersects one of the first grooves 210 will also intersect one of the second grooves 220 , and vice versa. Any axis that is perpendicular to both of the first and second surfaces 203 , 204 of the anchor wire 200 which does not intersect one of the first grooves 210 will also not intersect one of the second grooves 220 .
  • Each of the first grooves 210 comprises a floor 211 , a first sidewall 212 extending from the floor 211 to the first surface 203 , and a second sidewall 213 extending from the floor 211 to the first surface 203 .
  • the floor 211 is recessed relative to the first surface 203 of the anchor wire 200 .
  • the first and second sidewalls 212 , 213 are perpendicular to the floor 211 , which gives the first grooves 210 their square or rectangular shape.
  • a 90° angle is formed at the intersection of the floor 211 and the first and second sidewalls 212 , 213 of the first grooves 210 , although the corners where the first and second sidewalls 212 , 213 intersect the floor 211 could be somewhat rounded due to the manufacturing process as shown in FIG. 6 . Regardless, the first and second sidewalls 212 , 213 still extend perpendicularly relative to the floor 211 .
  • the first grooves 210 have a first groove depth D 1 measured from the floor 211 of the first groove 210 to the first surface 203 of the anchor wire 200 .
  • the first groove depth D 1 is approximately 0.05 mm (the term approximately including a tolerance of plus/minus 5%).
  • the first grooves 210 have a first groove width WG 1 measured from the first sidewall 212 to the second sidewall 213 .
  • the first groove width WG 1 is measured in a direction parallel to the first anchor wire axis B-B and perpendicular to the groove axis D-D and to the second anchor wire axis C-C.
  • each of the first grooves 210 has the same first groove width WG 1 .
  • the first groove width WG 1 may be between 0.28 mm and 0.32 mm, and more specifically approximately 0.30 mm.
  • the term approximately used herein includes a tolerance of plus or minus 5% from the provided value or dimension.
  • the first groove width WG 1 is greater than the thickness T 1 of the anchor wire 200 .
  • the first grooves 210 are spaced apart from one another by a first groove to groove spacing distance D 2 .
  • the first groove to groove spacing distance D 2 is the distance between one of the first grooves 210 and an immediately adjacent one of the first grooves 210 measured in a direction of the first anchor wire axis B-B.
  • the first groove to groove spacing distance D 2 only includes space between adjacent ones of the first grooves 210 and does not include any portion of the width of the first grooves 210 .
  • the first groove to groove spacing distance D 2 may be between 0.28 mm and 0.32 mm, and more specifically approximately 0.30 mm (with approximately including a tolerance of plus/minus 5%).
  • the first groove width WG 1 and the first groove to groove spacing distance D 2 are the same, or substantially equal (with the term substantially allowing for a tolerance such that one of the first groove width WG 1 and the first groove to groove spacing distance D 2 may be up to 5% greater than the other).
  • the plurality of first grooves 210 comprises end-most grooves that are positioned closest to the bottom and top ends 201 , 202 of the anchor wire 200 .
  • the end-most groove closest to the bottom end 201 of the anchor wire 200 is spaced apart from the bottom end 201 of the anchor wire 200 by a first groove to end spacing distance D 3 .
  • the end-most groove closest to the top end 202 of the anchor wire 200 is also spaced apart from the top end 202 of the anchor wire 200 by the first groove to end spacing distance D 3 .
  • the first groove to end spacing distance D 3 is between 0.22 mm and 0.28 mm, and more specifically approximately 0.25 mm (approximately including a tolerance of plus/minus 5%).
  • the anchor wire 200 may have the following dimensions: the first groove width WG 1 of approximately 0.3 mm, the first groove to groove spacing distance D 2 of approximately 0.3 mm, the thickness T 1 of approximately 0.28 mm, the first groove depth D 1 of approximately 0.05 mm, and the first groove to end spacing distance D 3 of approximately 0.25 mm.
  • the first groove width WG 1 and the first groove to groove spacing distance D 2 are the same. Furthermore, the first groove width WG 1 and the first groove to groove spacing distance D 2 are greater than the first groove to end spacing distance D 3 .
  • a ratio of the first groove width WG 1 to the first groove to end spacing distance D 3 may be between 1.1:1 and 1.3:1.
  • a ratio of the first groove width WG 1 to the first groove depth D 1 may be between 5:1 and 8:1, and more specifically 5.5:1 and 6.5:1.
  • a ratio of the thickness T 1 of the anchor wire 200 to the first groove depth D 1 may be greater than 4:1 and less than 6:1.
  • the second grooves 220 have an identical structure, shape, size, and the like as the first grooves 210 .
  • Each of the second grooves 220 comprises a floor 221 , a first sidewall 222 extending from the floor 221 to the second surface 204 , and a second sidewall 223 extending from the floor 221 to the second surface 204 .
  • the floor 221 is recessed relative to the second surface 204 of the anchor wire 200 .
  • the first and second sidewalls 222 , 223 are perpendicular to the floor 221 .
  • a 90° angle is formed at the intersection of the floor 221 and the first and second sidewalls 222 , 223 of the second grooves 220 , although the corners where the first and second sidewalls 222 , 223 intersect the floor 221 could be somewhat rounded due to the manufacturing process as shown in FIG. 6 . Regardless, the first and second sidewalls 222 , 223 still extend perpendicularly relative to the floor 221 .
  • the second grooves 220 have a second groove depth D 4 measured from the floor 221 of the second groove 220 to the second surface 204 of the anchor wire 200 .
  • the second groove depth D 4 is approximately 0.05 mm (approximately including a tolerance of plus/minus 5%).
  • the second groove depth D 4 of the second grooves 220 may be the same as the first groove depth D 1 of the first grooves 210 .
  • the second grooves 220 have a second groove width WG 2 measured from the first sidewall 222 to the second sidewall 223 in a direction of the first anchor axis B-B and perpendicular to the groove axis D-D and to the second anchor axis C-C.
  • Each of the second grooves 220 has the same second groove width WG 2 .
  • the second groove width WG 2 may be between 0.28 mm and 0.32 mm, and more specifically approximately 0.30 mm.
  • the term approximately used herein includes a tolerance of plus or minus 5% from the provided value or dimension.
  • the second groove width WG 2 may be identical to the first groove width WG 1 and may be greater than the thickness T 1 .
  • the second grooves 220 are spaced apart from one another by a second groove to groove spacing distance D 5 .
  • the second groove to groove spacing distance D 5 is the distance between one of the second grooves 220 and an immediately adjacent one of the second grooves 220 in a direction of the first anchor axis B-B.
  • the second groove to groove spacing distance D 5 only includes space between adjacent ones of the second grooves 220 and does not include any portion of the width of the second grooves 220 .
  • the second groove to groove spacing distance D 5 may be between 0.28 mm and 0.32 mm, and more specifically approximately 0.30 mm (with approximately including a tolerance of plus/minus 5%).
  • the second groove width WG 2 and the second groove to groove spacing distance D 5 are the same or substantially equal (with the term substantially allowing for a tolerance such that one of the second groove width WG 2 and the second groove to groove spacing distance D 5 may be up to 5% greater than the other).
  • the second groove width WG 2 may also be the same as the first groove width WG 1 and the second groove to groove spacing distance D 5 may be the same as the first groove to groove spacing distance D 2 .
  • the plurality of second grooves 220 comprises end-most grooves that are positioned closest to the bottom and top ends 201 , 202 of the anchor wire 200 .
  • the end-most one of the second grooves closest to the bottom end 201 of the anchor wire 200 is spaced apart from the bottom end 201 of the anchor wire 200 by a second groove to end spacing distance D 6 .
  • the end-most one of the second grooves closest to the top end 202 of the anchor wire 200 is also spaced apart from the top end 202 of the anchor wire 200 by the second groove to end spacing distance D 6 .
  • the second groove to end spacing distance D 6 is between 0.22 mm and 0.28 mm, and more specifically approximately 0.25 mm (approximately including a tolerance of plus/minus 5%).
  • the dimensions of the second grooves 220 and the spacing therebetween and relative to the bottom and top ends 201 , 202 are identical to that which was provided above for the first grooves 210 .
  • the second groove to end spacing distance D 6 is the same as the first groove to end spacing distance D 3 .
  • the anchor wire 200 may have the following dimensions: the second groove width WG 2 of approximately 0.3 mm, the second groove to groove spacing distance D 5 of approximately 0.3 mm, the thickness T 1 of approximately 0.28 mm, the second groove depth D 4 of approximately 0.05 mm, and the second groove to end spacing distance D 6 of approximately 0.25 mm.
  • the second groove width WG 2 and the second groove to groove spacing distance D 5 are the same. Furthermore, the second groove width WG 2 and the second groove to groove spacing distance D 5 are greater than the second groove to end spacing distance D 6 .
  • a ratio of the second groove width WG 2 to the second groove to end spacing distance D 6 may be between 1.1:1 and 1.3:1.
  • a ratio of the second groove width WG 2 to the second groove depth D 2 may be between 5:1 and 8:1, and more specifically 5.5:1 and 6.5:1.
  • a ratio of the thickness T 1 of the anchor wire 200 to the second groove depth D 4 may be greater than 4:1 and less than 6:1.
  • the anchor wire 200 may have a second thickness T 2 measured from the floor 211 of one of the first grooves 210 to the floor 221 of the one of the second grooves 220 that is aligned with the first groove 210 .
  • a ratio of the second thickness T 2 to a sum of the first and second groove depths (T 2 :(D 1 +D 4 )) may be in a range of 1.5:1 and 2.5:1, and more specifically between 1.5:1 and 2.0:1, and still more specifically approximately 1.8:1.
  • a ratio of the thickness T 1 of the anchor wire 200 to the second thickness T 2 may be between 1.3:1 and 1.8:1, and more specifically between 1.5:1 and 1.6:1.
  • a ratio of the first groove width WG 1 or the second groove width WG 2 to the thickness T 2 may be in a range of 1.5:1 and 1.8:1, and more specifically between 1.6:1 and 1.7:1.
  • the head portion 120 of the toothbrush 100 is illustrated with the bristle tufts omitted.
  • one of the anchor wires 200 is illustrated positioned within each of the tuft holes 130 .
  • each of the anchor wires 200 is positioned within one of the tuft holes 130 in the same orientation.
  • the second anchor axes C-C of each of the plurality of anchor wires 200 are parallel to one another when the anchor wires 200 are disposed within the tuft holes 130 .
  • the groove axes D-D are parallel to the second anchor axes C-C and thus are oriented as shown in FIG. 7 as well.
  • each of the anchor wires 200 is positioned within one of the tuft holes 130 so that the second anchor axes C-C and the groove axes D-D are oblique to the longitudinal axis A-A of the toothbrush 100 and the head portion 120 thereof. More specifically, the second anchor axes C-C and the groove axes D-D of the anchor wires 200 form an oblique angle ⁇ 1 with the longitudinal axis A-A of the head portion 120 of at least 10 degrees. In other embodiments, the oblique angle ⁇ 1 is at least 15 degrees. In some embodiments, the oblique angle ⁇ 1 is between 10 degrees and 20 degrees, and more specifically between 12 degrees and 18 degrees, and more specifically between 14 degrees and 16 degrees, and still more specifically approximately 15 degrees.
  • FIG. 8 illustrates an anchor wire 300 of the prior art that is previously known to have been used on toothbrushes formed from cellulosic material such as bamboo.
  • the anchor wire 300 of FIG. 8 is formed from brass or a metal alloy comprising brass and devoid of nickel.
  • the anchor wire 300 is a double grooved anchor wire in that it has grooves on both faces thereof similar to the anchor wire 200 .
  • the sidewalls of the grooves of the anchor wire 300 are not perpendicular to the floor of the grooves of the anchor wire 300 .
  • the grooves have a trapezoidal shape instead of a square/rectangular shape.
  • the combination of forming the anchor wire 200 from a metal alloy comprising nickel and such that the first and second grooves 210 , 220 have walls that are perpendicular to its floor has resulted in the toothbrush 100 having an improved tuft retention due to the stronger nickel material and an increased friction between the anchor wire 200 and the sidewall 132 of the tuft hole 130 .
  • FIG. 9 a graph illustrating the tuft retention for the toothbrush 100 formed from bamboo using the anchor wire 300 of FIG. 8 and using the anchor wire 200 of FIGS. 5 and 6 is provided.
  • the average tuft retention with the anchor wire 200 is 41.6 N whereas the average tuft retention with the anchor wire 300 is 30.4.

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US18/001,107 2020-06-17 2020-06-17 Toothbrush and Anchor Wire Therefor Pending US20230210247A1 (en)

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EP (1) EP4030963A4 (zh)
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CN116491757B (zh) * 2023-04-12 2023-10-20 中山尚洋科技股份有限公司 一种防异味化妆刷毛及其制备方法

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Publication number Priority date Publication date Assignee Title
AU718687B2 (en) * 1995-06-12 2000-04-20 Berkenhoff Gmbh Brush for improved tuft retention and anchor wire therefor
BE1012911A3 (nl) * 1999-09-28 2001-05-08 Boucherie Nv G B Borstel, alsmede werkwijze en inrichting voor het vervaardigen van dergelijke borstel.
JP2001309818A (ja) 2000-04-28 2001-11-06 Lion Corp ブラシ
DE10163729A1 (de) * 2001-12-21 2003-07-10 Zahoransky Anton Gmbh & Co Verfahren und Vorrichtung zum Herstellen von Bürsten
US20060242779A1 (en) 2005-04-28 2006-11-02 Accurate Wire, Inc. Brush with stapled tufts
KR20140094332A (ko) * 2013-01-22 2014-07-30 박성우 칫솔모 고정용 앵커 이형 평선
JP6906313B2 (ja) 2017-01-17 2021-07-21 ライオン株式会社 歯ブラシ
CN206896059U (zh) * 2017-06-20 2018-01-19 贝尔纳塑料制品（苏州）有限公司 一种儿童牙刷
SE542754C2 (en) 2018-06-14 2020-07-07 Tepe Munhygienprodukter Ab Toothbrush handle, toothbrush and methods of manufacturing
CN111248611A (zh) 2018-11-30 2020-06-09 顾如民 一种竹质的牙刷手柄及其制备方法

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CN115867170A (zh) 2023-03-28
WO2021253261A1 (en) 2021-12-23
EP4030963A1 (en) 2022-07-27

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