KR20170031646A - Toothbrush - Google Patents

Abstract

It is an object of the present invention to provide a toothbrush which is excellent in entrapment property into a periodontal pocket or an interdental space, can reduce the risk to the gum, and has excellent jig removal ability. A head portion 16 having a knife hole 19 disposed on one side 16a side of the knife hole 19 and a conical portion 14-3 , And the plurality of outward appearance portions have an elliptical cut surface constituting the side surface of the conical portion 14-3 and the cut surface has an outer periphery of the bottom surface of the conical portion 14-3 And the length of the major axis of the ellipse is shortened from the edge toward the apex of the conical portion 14-3.

Description

Toothbrush {TOOTHBRUSH}

The present invention relates to a toothbrush which is excellent in entrapment property to a periodontal pocket or an interdental space, can reduce the risk to the gum, and has excellent jig removal capability.

The present application claims priority based on Japanese Patent Application No. 2014-139915 filed on July 7, 2014, the contents of which are incorporated herein by reference.

Conventionally, there is a toothbrush as a toothbrush suitable for cleaning a portion having a large amount of toothbrush residue (for example, a boundary line of a gum, an interdental region, a molar region, or a region with bad teeth).

The one-touch brush is a brush formed by arranging a bundle of hair on a large bristle hole having a diameter of about 3.0 mm formed in the head portion, and cutting the tip portion of the breast as necessary.

As a conventional one-touch brush, for example, a tip of a straight bristle brush of about 3 to 6 mil is cut into a conical shape, and a bristle of a tapered brush of about 7.5 mil (without cutting) exists. Further, 1 mil is 0.0254 mm.

Patent Document 1 discloses a single tuft brush comprising a single tuft which is formed by bundling a plurality of filaments (see-throughs) in a single hair-removal hole provided at the tip of a handle portion, wherein the diameter of the filament is set to 0.076 to 0.15 mm, A single tuft brush is disclosed in which a hair bundle is fixed to a knife hole and the leading end of the comb is cut into a conical shape and the tip of the filament is rounded to the tip.

Patent Document 2 discloses an interdental brush in which a filament is tapered in an interdental brush having filament (appearance) made of a synthetic resin along the longitudinal direction in the shape of a mountain, and the filament is arranged in a mountain shape to constitute a brush portion have.

Patent Document 3 discloses a tapered synthetic resin shoe having a single shoe bundle bundled so as to have one shoe top and fixed at the lower portion of the opposite side to the top portion, a base portion to which the lower portion of the shoe shoe is fixed, And an interdental brush composed of a grip portion provided in the base portion.

Japanese Patent Application Laid-Open No. 2013-52110 Japanese Patent Application Laid-Open No. 2007-195713 Japanese Patent Application Laid-Open No. 2007-175143

However, the single-tipped brush disclosed in Patent Document 1 uses a tapered shape in which the diameter of the filament becomes larger as the diameter of the filament is spaced from the tip of the filament because the tip of the filament is cut into a conical shape having a diameter of 0.076 to 0.15 mm There is a problem that it is difficult to form a wedge in a narrow gap such as an interdental space or a cervical portion.

In addition, since the straight moth has a diameter larger than the diameter of the tapered mother end portion, cutting the straight moth significantly increases the area of the cut surface, and the sharpened corner portion has an acute angle.

In addition, there is also a single tufted brush which is made by rounding the end of the hair of a straight moth to inhibit the gum from hurting. However, even if such a single tufted brush is used, it is difficult to come to a narrow gap such as an interdental space or a cervical part Can not be solved.

Since the interdental brush disclosed in Patent Documents 2 and 3 has a bundle of tapered bristles, it is excellent against entry into a narrow gap such as an interdental region and a cervical region, and no risk to the gums.

However, since the interdental brushes disclosed in Patent Documents 2 and 3 use a tapered tooth, the scraping force of the jig is slightly weak, which is a problem in that the tooth surface is inferior to the straight tooth in the function surface.

The object of the present invention is to provide a toothbrush which is excellent in entrapment property into a periodontal pocket or an interdental space, has a reduced risk to the gum, and is excellent in jig removal performance .

In order to solve the above problems, a toothbrush according to an embodiment of the present invention includes a head portion having a knife hole disposed on one side thereof, and a conical portion formed in the knife hole and formed of a plurality of pieces, Wherein the plurality of features have an elliptical cut surface constituting a side surface of the conical portion and the cut surface is a portion of the elliptical surface of the conical portion from the outer circumferential edge of the bottom surface of the conical portion toward the apex of the conical portion, And the length of the major axis is shortened.

Further, in the toothbrush according to the embodiment of the present invention, the plurality of appearances may be tapered, and the conical portion may be disposed in the plurality of tapered tapered portions.

Further, in the toothbrush according to the embodiment of the present invention, the apex angle of the cone portion may be within a range of 60 ° to 80 °.

In the toothbrush according to an embodiment of the present invention, the length of the major axis of the cut surface of the appearance located near the vertex of the conical portion among the plurality of features may be 0.080 to 0.120 mm.

(Effects of the Invention)

According to the toothbrush of the present invention, it is possible to improve the entrances of the wig to the periodontal pocket or the teeth, reduce the risk to the gums, and improve the jig removal capability.

1 is a front view of a toothbrush according to an embodiment of the present invention.
2 is a rear view of the toothbrush shown in Fig.
Fig. 3 is a side view of the toothbrush shown in Fig. 2 viewed from B; Fig.
Fig. 4 is a front view of the toothbrush shown in Fig. 1, which is an enlarged view of a portion surrounded by the area A. Fig.
Fig. 5 is a side view of the toothbrush shown in Fig. 3, in which the area surrounded by the area C is inverted upside down.
Fig. 6 is a cross-sectional view of the conical portion of the foot in the DD line direction constituting the toothbrush shown in Fig. 4; Fig.
Fig. 7 is an enlarged perspective view of a tip end portion of a taper mock near the apex of the conical portion shown in Fig. 6; Fig.
8 is an enlarged perspective view of a tip end portion of a tapered mover disposed at an outer peripheral portion of a conical portion separated from the vicinity of a vertex of a conical portion.
9 is a view (1) showing a manufacturing process of a toothbrush according to an embodiment of the present invention, and is a side view for explaining a step of collectively forming a head part, a neck part, and a handle part.
10 is a view (No. 2) showing a manufacturing process of a toothbrush according to an embodiment of the present invention, and is a side view for explaining a step of molding a bundle of hair made of a plurality of appearances into a hair-removal hole.
Fig. 11 is a cross-sectional view schematically showing the shape of a gathered portion when the bundle of the toothbrush before the cutting, surrounded by the region F, is divided into two parts in the longitudinal direction of the toothbrush shown in Fig.

Hereinafter, embodiments to which the present invention is applied will be described in detail with reference to the drawings. The drawings used in the following description are for explaining the constitution of the embodiment of the present invention, and the sizes, thicknesses, dimensions, and the like of the respective parts shown in the drawings may be different from those of actual toothbrushes.

(Embodiments)

1 is a side view of a toothbrush according to an embodiment of the present invention. 2 is a rear view of the toothbrush shown in Fig. Fig. 3 is a side view of the toothbrush shown in Fig. 2 viewed from B; Fig.

The X direction shown in Figs. 1 to 3 indicates the extending direction of the handle portion 17 constituting the handle body 11. As shown in Fig. The Y direction shown in Figs. 1 and 2 shows the width direction of the toothbrush 10. The Z direction shown in Fig. 3 indicates the extension direction of the bundle 14. 1 to 3, the same components are denoted by the same reference numerals.

1 to 3 illustrate a toothbrush 10 as an example of the toothbrush 10 of the present embodiment, and the following description will be given.

Referring to Figs. 1 to 3, the toothbrush 10 of the present embodiment has a handle body 11 and a hair bundle 14.

The handle body 11 has a head portion 16, a handle portion 17, a neck portion 18, and a knife hole 19. The head portion 16 is a substantially columnar member extending in the Z direction (or in a slightly inclined direction with respect to the Z direction).

The head portion 16 is a surface on the side where the pattern 14 protrudes and has a flat surface 16a.

The handle portion 17 is a portion held by hand when the toothbrush 10 is used, and extends in the X direction. A non-skid portion 21, which is a plurality of recesses, is formed on the side of the handle portion 17 near the neck portion 18 to prevent the finger from slipping when the toothbrush 10 is used.

The neck portion 18 is a member extending in a slightly inclined direction with respect to the X direction, and is made thinner than the handle portion 17.

One end of the neck portion 18 is integrally formed with the head portion 16 and the other end is formed integrally with the handle portion 17. That is, the neck portion 18 connects the head portion 16 and the handle portion 17.

Fig. 4 is a front view of the toothbrush shown in Fig. 1, which is an enlarged view of a portion surrounded by the area A. Fig. Fig. 5 is a side view of the toothbrush shown in Fig. 3, in which the area surrounded by the area C is inverted upside down.

In Figs. 4 and 5, the same components as those shown in Figs. 1 to 3 are denoted by the same reference numerals.

Referring to Figs. 3 to 5, one hair-removal hole 19 is formed in the head portion 16. The knife hole 19 is exposed by the one surface 16a. The hair-removing hole 19 is a hole for removing the hair bundle 14.

The diameter of the hair-removal hole 19 in the portion exposed on the one surface 16a may be, for example, 3 mm. The depth d of the hair-removal hole 19 in the Z-direction (the depth of the hair-removal hole 19 with respect to the one surface 16a) is appropriately set within a range of, for example, 3.0 to 6.0 mm Can be set.

The handle body 11 thus configured is manufactured by integrally molding. The material of the handle body 11 can be determined in consideration of the rigidity and mechanical characteristics sought by the handle body 11. For example, a hard resin having a flexural modulus (JIS K7203) in the range of 500 to 3000 MPa Can be used.

Examples of such a hard resin include polyolefins such as polypropylene (PP), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polycyclohexylenedimethylene terephthalate (PCT), polyacetal PS), acrylonitrile-butadiene-styrene resin (ABS), cellulose propionate (CP), polyarylate, polycarbonate, acrylonitrile-styrene copolymer resin Can be used.

Referring to Fig. 5, the hair bundle 14 is formed by bundling a plurality of appearances, and has a burring portion 14-1, a columnar portion 14-2, and a conical portion 14-3.

The embedding portion 14-1 is a portion accommodated in the hair-removal hole 19. In Fig. 5, the columnar portion 14-2 is a portion disposed above the embedding portion 14-1 and is not cut (cut).

The height (H ₂ ) of the columnar section 14-2 can be appropriately set within a range of, for example, 3.0 to 8.0 mm.

The conical portion 14-3 constitutes the tip portion of the bundle 14 and is a conical portion formed by cutting. The conical portion 14-3 is a portion that enters the periodontal pocket or the teeth when the toothbrush 10 is used.

6 is a cross-sectional view taken along the line D-D of the conical portion of the foot of the foot shown in Fig.

Fig. 7 is an enlarged perspective view of a tip end portion of a taper mock near the apex of the conical portion shown in Fig. 6; Fig. 8 is an enlarged perspective view of a tip end portion of a tapered mover disposed at an outer peripheral portion of a conical portion separated from the vicinity of a vertex of a conical portion.

In Figs. 6 to 8, the same components as those of the structures shown in Figs. 1 to 5 are denoted by the same reference numerals.

In Fig. 6, "23" is attached to a plurality of taper shafts of the same kind made of tapered shafts and having different tip cutting positions. In FIG. 6, for the sake of convenience of explanation, only a part of tapered portions among a plurality of tapers 23 actually dense and dense are shown.

In Fig. 7, for convenience of description, "23-1" is attached to the taper mosa shown in Fig. 8, "23-2" is attached to the taper shots shown in FIG. 8 for convenience of explanation. The tapered worms 23-1 and 23-2 shown in Figs. 7 and 8 are made of the same kind of tapered cores, and differ only in the position at which the tip ends are cut.

Among the tapered cores 23-1 and 23-2 shown in Figs. 7 and 8, a portion indicated by a dotted line indicates a cut portion.

Next, referring to Figs. 6 to 8, the configuration of the conical portion 14-3 will be described in detail, taking as an example a case where the bundle 14 shown in Fig. 5 is composed of a plurality of tapered blades 23 .

Mo bundle 14, as shown in Figure 6, for when the instance based on the front end (tip end (T ₂₎ shown in Fig. 7 and 8) of the tapered base 23 prior to the cutting position (cutting of the distal end Position) of the tapered protrusions 23 are different from each other. In this case, the plurality of tapered worms 23 have an elliptical cut surface 23a.

The plurality of cut surfaces 23a constitute the side surface 14-3a of the conical portion 14-3. The angle formed by the cut surface 23a and the Z axis (in other words, the inclination angle of the cut surface 23a with respect to the Z direction) is equal to 1/2 of the apex angle? Of the cone portion 14-3.

6 to the area of the cut surface (23-1a) of the tapered base (23-1) disposed in the vicinity of the apex (T ₁₎ of the conical portion 14-3 as shown in Fig. 8 is a conical portion (14-3) Sectional area of the cut surface 23-2a of the tapered prism 23-2 forming the outer peripheral portion of the tapered prism 23-2.

In other words, the long axis of the cut surface (23-1a) onto the oval (E ₁₎ is configured to be shorter than the length of the major axis (E ₂₎ of the elliptical cut surface (23-2a).

6, the cut surface 23a is formed so that the length of the major axis of the ellipse becomes shorter as it goes from the outer peripheral edge of the bottom surface 14-3b of the conical section 14-3 toward the apex T _{1 of the} conical section .

As shown in Fig. 7, the tapered prism 23-1 constituting the vicinity of the apex T ₁ of the cone portion 14-3 has a portion close to the tip T ₂ , (I.e., the thickness of the distal end of the tapered prism 23-1 after cutting is thin), it is possible to improve the entrapment property to the periodontal pocket and the teeth, Can be reduced.

8, the tapered prism 23-2 disposed at the outer peripheral portion of the conical portion 14-3 separated from the vicinity of the apex T ₁ of the conical portion 14-3 has a tip T ₂ , Is cut off.

As a result, the jig removing ability can be improved because the area of the cut surface 23a-2 in the elliptical shape becomes larger (in other words, the thickness of the tip of the taper shin 23-2 after cutting becomes thicker).

As a plurality of features constituting the female thread 14, for example, a tapered shell may be used as described above. The tapered portion has a tapered portion having a tapered shape and a base portion having a constant diameter. The tip of the tapered portion is the thinnest, and the diameter increases as the tip is separated from the tip.

Therefore, the tapered portion 23 is used as a plurality of appearances constituting the female thread 14, and the conical portion 14-3 is formed in the tapered portion, so that the bottom surface 14- from the outer circumferential edge of the 3b) the shape in which the shorter the length of the long axis of the cut surface (23a) onto the oval along toward the vertex (T ₁₎ of the conical part 14-3 can be easily processed.

Examples of the material of the appearance (including the tapered shims 23) constituting the matrix 14 include, but are not limited to, 6-12 nylon (6-12NY) or 6-10 nylon (6-10NY) Or polyesters such as polyethylene terephthalate (PBN), polyolefins such as polypropylene (PP), or polyolefin elastomers such as polyethylene terephthalate (PTT), polyethylene naphthalate And an elastomeric resin such as an elastomer.

These resin materials may be used singly or in combination of two or more.

In addition, as the appearance (including the tapered shims 23) constituting the female thread 14, for example, a multi-core structure made of polyester having a core portion and at least one layer of the core portion covering the outside of the core portion, May be used.

In addition, as the cross-sectional shape of the appearance (including the tapered shims 23) constituting the female thread 14 (the cross-sectional shape when the appearance is cut in the plane orthogonal to the Z direction in Fig. 5) For example, a circular cross-sectional shape such as a round shape or an elliptical shape, or a substantially triangular shape, or a deformed cross-sectional shape such as a substantially rectangular shape can be used.

The apex angle? Of the cone portion 14-3 may be set within a range of, for example, 60 ° to 80 °. As described above, by setting the apex angle? Of the cone portion 14-3 within a range of, for example, 60 ° to 80 °, it is possible to improve the entrapment property into the periodontal pocket or the interdental space, The jig removal capability can be improved.

Of the plurality of cut surfaces made into an elliptical shape, the range of the major axis of 23-1a in the vicinity of the apex (T ₁ ) may be, for example, 0.080 to 0.120 mm.

By setting the range of the major axis of the elliptical cut surface 23-1a to be 0.080 to 0.120 mm, it is possible to improve the entrapment property to the periodontal pocket or the teeth, and to reduce the risk to the gum .

When the portion of 8.0 mm from the tip end T ₂ of the tapered prism 23 at the stage before forming the cone portion 14-3 is a tapered portion, the height H ₃ of the cone portion 14-3 is For example, 2.0 mm. In this case, the height H ₁ of the pattern bundle 14 protruding from the one surface 16a may be 9.0 mm, for example.

The toothbrush of the present embodiment has a head portion 16 having a knife hole 19 disposed on one side 16a side and a plurality of tapered bristles 23 formed on the knife hole 19, And a plurality of tapered worms 23 are formed on the elliptical shape constituting the side surface 14-3a of the conical portion 14-3, The length of the major axis of the ellipse along the cutting plane 23a from the outer peripheral edge of the bottom surface of the conical section 14-3 toward the apex T ₁ of the conical section 14-3, And a plurality of tapered blind holes 23 are formed in the hair removal holes 19 of the head portion 16 to shorten the hair bundle 14 including the conical portion 14-3 having a conical shape at the tip portion, And the cut surface 23a of the plurality of elliptically shaped tapered blinds 23 constituting the side surface 14-3a of the conical portion 14-3 is formed in the bottom of the conical portion 14-3 On the outer peripheral edge of the surface 14-3b From the tapered constituting the vicinity of the vertex (T ₁₎ of the conical portion (14-3) by shortening the length of the major axis of the ellipse in the cutting plane (23a) depending toward the apex (T ₁₎ of the conical portion 14-3 Mo The area of the cut surface 23a-1 of the tapered portion 23-1 becomes smaller and the thickness of the tip of the tapered portion 23-1 after cutting becomes smaller, so that the ability to enter the periodontal pocket or the teeth can be improved In addition, the risk to the gums can be reduced.

In addition, the area of the conical portion (14-3) peaks (T ₁₎ the cut (23a-2) of the conical portion (14-3) a tapered base (23-2) disposed on the outer peripheral portion of the remote from the vicinity of the larger ( In other words, since the thickness of the tip of the tapered prism 23-2 after the cutting becomes thick, the jig removing ability can be improved.

Fig. 9 is a side view for explaining a step of manufacturing a toothbrush according to an embodiment of the present invention, and a step of collectively forming a head part, a neck part, and a handle part. Fig. 10 is a side view for explaining a step of manufacturing a toothbrush in accordance with the embodiment of the present invention, and a step of forming a bundle of a plurality of pieces of hair into a hair-removal hole.

Fig. 11 is a cross-sectional view schematically showing the shape of a gathered portion when the bundle of the toothbrush before the cutting, surrounded by the region F, is divided into two parts in the longitudinal direction of the toothbrush shown in Fig.

In Figs. 9 to 11, the same components as those of the structures shown in Figs. 1 to 10 are denoted by the same reference numerals.

Next, a method of manufacturing the toothbrush 10 (see Figs. 1 to 3) of the present embodiment will be described with reference to Figs. 9 to 11. Fig.

9, a pair of molds (not shown) having a space (cavity) corresponding to the shape of the handle body 11 shown in Fig. 9 is prepared, and a hard resin (Resin that becomes the material of the mold 11).

Thereafter, after the hard resin is hardened, the handle body 11 made of the hardened resin is taken out from the pair of molds. Thus, the handle portion 11 having the hair-removal hole 19 is formed in the head portion 16.

10, a plurality of tapered blades 23 (not _shown ) are arranged on the flat surface S so that the tip ends T2 of the plurality of tapered blades 23 are arranged on the same plane S, (The pattern 14 before the cone portion 14-3 is formed) (see Fig. 11).

The flocking of the hair bundle 14 can be performed by using, for example, a flat knife hair knife method.

More specifically, as shown in Fig. 11, a plurality of tapered blades 23 constituting the bundle 14 (in this stage, tips are not cut) are arranged on the same plane S 14 are folded into two pieces and the pieces are inserted into the knock hole 19.

Thereafter, a plate of metal (for example, brass) is pressed into the knock hole 19 from the inside of the bent bundle 14. As a result, the tufts 26 are fixed in the knock hole 19 to form the structure 25 shown in Fig.

Next, the distal end of the hair bundle 14 is brought close to a rotary cutter (not shown) so that the distal end of the hair bundle 14 is brought close to the hair knife hole 19 to cut the distal end of the hair bundle 26, Thereby forming a conical portion 14-3 made of the same material. Thus, the toothbrush 10 of the present embodiment is manufactured.

The method of manufacturing a toothbrush of the present embodiment is characterized in that the tapered holes 23 formed in the head portion 16 are provided with a plurality of tapered holes 23 so that the tips T ₂ of the plurality of tapered holes 23 are arranged on the same plane S. [ (14) made up of a plurality of blade holes (23); and a step of bringing the tip end of the blade (14), which is worn on the blade hole (19) at an inclined angle relative to the rotating rotary blade (36) 14 of the plurality of taper shims 23 are cut so that the conical portion 14-3 is formed in the tip end portion of the bundle 14, (14-3) from the outer peripheral edge of the bottom surface (14-3b) of the conical portion (14-3) toward the apex (T ₁ ) of the conical portion (14-3) The length of the major axis of the ellipse is short, the cut surface 23a can be easily formed, the risk to the gum can be reduced, and the periodontal pocket, The base end it is possible to improve the penetration property, and can also improve the ability to remove the jig.

Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to these specific embodiments, and various modifications and changes may be made within the scope of the present invention described in the claims.

For example, in the present embodiment, the toothbrush 10 is described as a toothbrush having one hair-removal hole 19, but the present invention is also applicable to toothbrushes other than a toothbrush. Concretely, it is possible to dispose a plurality of kneaders 14 having a conical section 14-3 in a knife hole positioned at the tip end of a head of a general toothbrush having a plurality of knife holes, Other hair bundles may be arranged in the hair-removal holes.

It is also possible to arrange the hair bundle 14 having the conical portion 14-3 in the plurality of hair-removal holes.

Hereinafter, a test example will be described.

(Preparation of toothbrush of Test Example 1)

A toothbrush (hereinafter referred to as " toothbrush U1 ") of Test Example 1 will be mainly described with reference to Figs. 3, 5, and 6. Fig.

In Test Example 1, a toothbrush U1 having a conical portion 14-3 was manufactured by performing the same process as the above-described manufacturing process of the toothbrush 10.

At this time, the diameter of the casting hole 19 formed in the head portion 16 was 3.5 mm. A tapered portion having a diameter of 190 mu m as a base portion (a portion other than the tapered portion) was used as the appearance of the bundle 14. Polybutylene terephthalate was used as the tapered material.

The apex angle [theta] of the cone portion 14-3 was set to 72 degrees. The length of the major axis of the elliptical cut surface 23a formed in the tapered prism 23 located at the apex T ₁ of the conical portion 14-3 was measured and found to be 0.045 mm.

Table 1 shows the configuration of the toothbrush U1 of Test Example 1 above.

(Preparation of toothbrush of Test Example 2)

A toothbrush (hereinafter referred to as " toothbrush U2 ") of Test Example 2 will be mainly described with reference to Figs. 3, 5, and 6. Fig.

In Test Example 2, the toothbrush U2 having the conical portion 14-3 was manufactured by performing the same process as the manufacturing process of the toothbrush 10 described in Figs. 9 to 11 described above.

The toothbrush U2 of Test Example 2 had the same configuration as that of the toothbrush U1 of Test Example 1 except that the length of the major axis of the elliptical cut surface formed in the tapered portion located at the apex T ₁ of the conical portion 14-3 was 0.086 mm .

Table 1 shows the configuration of the toothbrush U2 of the second test example.

(Preparation of toothbrush of Test Example 3)

A toothbrush (hereinafter referred to as " toothbrush U3 ") of Test Example 3 will be mainly described with reference to Figs. 3, 5, and 6. Fig.

In Test Example 3, the toothbrush U3 having the conical portion 14-3 was manufactured by performing the same process as the manufacturing process of the toothbrush 10 described in Figs. 9 to 11 described above.

The toothbrush U3 of Test Example 3 had the same configuration as that of the toothbrush U1 of Test Example 1 except that the length of the major axis of the elliptical cut surface formed in the tapered portion located at the apex T ₁ of the conical portion 14-3 was 0.117 mm .

Table 1 shows the configuration of the toothbrush U3 of Test Example 3 above.

(Preparation of toothbrush of Test Example 4)

A toothbrush (hereinafter referred to as " toothbrush U4 ") of Test Example 4 will be mainly described with reference to Figs. 3, 5, and 6. Fig.

In Test Example 4, the toothbrush U4 having the conical portion 14-3 was manufactured by performing the same process as the manufacturing process of the toothbrush 10 described in Figs. 9 to 11 described above.

The toothbrush U4 of Test Example 4 had the same configuration as that of the toothbrush U1 of Test Example 1 except that the length of the major axis of the elliptical cut surface formed in the tapered portion located at the apex T ₁ of the conical portion 14-3 was 0.134 mm .

Table 1 shows the configuration of the toothbrush U4 of the fourth test example.

(Preparation of toothbrush of Test Example 5)

A toothbrush (hereinafter referred to as " toothbrush U5 ") of Test Example 5 will be mainly described with reference to Figs. 3, 5, and 6. Fig.

In Test Example 5, the toothbrush U5 having the conical portion 14-3 was manufactured by performing the same process as the manufacturing process of the toothbrush 10 described in Figs. 9 to 11 described above.

The toothbrush U5 of Test Example 4 uses a straight hair (base portion diameter of 165 탆, a material of 6-12 nylon) instead of a tapered tooth and a tapered portion located at the apex T ₁ of the conical portion 14-3 The configuration of the toothbrush U1 of Test Example 1 was the same as that of Test Example 1 except that the length of the long axis of the elliptical cut surface formed on the tooth was 0.274 mm.

The configuration of the toothbrush U5 of Test Example 5 is shown in Table 1.

(Evaluation test of interdental model cleaning power when toothbrushes U1 to U5 of Test Examples 1 to 5 were used)

Then, an evaluation test of the interdental model cleaning force of the toothbrushes U1 to U5 of the test examples 1 to 5 was carried out.

The interdental model cleaning power was performed by the method described below and evaluated.

First, a red paint (Sakura Whiteboard Marker # 19 Red, manufactured by SAKURA COLOR PRODUCTS CORPORATION) was applied to the right ball side first molar and the second molar side of the adult maxillary model (500AU, manufactured by Nissin Dental Products Inc.) did.

Then, while reciprocating five times with a stroke of 20 mm in the direction connecting the tip of the head and the base of the head while pressing each toothbrush U1 to U5 vertically against the teeth of the first molar and the second molar forming the model jig Cleaned. At this time, the load was 100 g and the brush cleaning speed was 120 rpm.

After cleaning, the jig removal rate was measured by the following method.

Evaluation of interdental model cleaning power Before the test, the model fixture occupied area between the teeth of the first molar and the second molar was measured by image analysis and the model fixture occupied area of the same area was measured again after the evaluation of the interdental model cleaning power (1).

(1) Jig removal rate (%) = ((Jig occupancy area before interdental model cleaning force test - Jig occupation area after interdental model cleaning force test) / (Jig occupancy area before interdental model cleaning power test)

The jig removal rates of Test Examples 1 to 4, which are other test examples in which the jig removal rate in Test Example 5, which was the worst in cleaning power, was taken as 100% among the jig removal rates calculated by the above formula (1).

Then, the jig removal rate (%) of each of Test Examples 1 to 4 quantitated on the basis of Test Example 5 was evaluated based on the following criteria.

When the jig removal rate was greater than 120%, it was evaluated as?. When the jig removal rate was greater than 110% and less than 120%, it was evaluated as?.

When the dental calculus removal rate was greater than 105% and less than 110, it was evaluated as?. Also, when the jig removal rate was 100% or more and 105% or less, it was evaluated as X. [

Table 1 shows the evaluation of the interdental model cleaning power determined based on the above-described criteria.

(Evaluation test of cervical portion model cleaning force when the toothbrushes U1 to U5 of Test Examples 1 to 5 were used)

Then, an evaluation test of the cervical portion model cleaning force of the toothbrushes U1 to U5 of the test examples 1 to 5 was carried out.

The cervical model cleaning power was obtained by applying a red paint (Sakura Whiteboard Marker # 19 Red, manufactured by SAKURA COLOR PRODUCTS CORPORATION) to the right ball-side first molar of an adult maxilla model (500AU, manufactured by Nissin Dental Products Inc.) The evaluation was carried out in the same manner as in the evaluation test of the model cleaning power and evaluated by the same method.

Table 1 shows the evaluation results of the cervical portion model cleaning force of the toothbrushes U1 to U5 of Test Examples 1 to 5.

(Evaluation test of feeling of use (risk) when using toothbrushes U1 to U5 of Test Examples 1 to 5)

Subsequently, an evaluation test was conducted for the feelings (risk) of the toothbrushes U1 to U5 of Test Examples 1 to 5.

Five professional panelists used the toothbrushes U1 to U5 of the test examples 1 to 5 for one week, and the contact feeling with the gums was evaluated in seven stages according to the following evaluation criteria.

At this time, one point was evaluated as "I felt very painful" and 7 points as "I did not feel any pain at all".

Then, the average value of the five evaluations was classified into the following criteria, and the evaluation was made of the feeling of use (risk).

And the case where the average value of five persons was 5.0 or more was evaluated as?. And the average value of the five persons was 4.0 or more and less than 5.0 points. The average value of the five persons was 3.0 or more and less than 4.0, which was evaluated as?. And the case where the average value of five persons was less than 3.0 was evaluated as x.

The results are shown in Table 1.

(Evaluation results of interdental model cleaning power, cervical model cleaning power, and feeling of use (risk) of the toothbrushes U1 to U5 of Test Examples 1 to 5)

Referring to Table 1, the toothbrush U5 of Test Example 5 had the worst results in evaluation of all the evaluations of model cleaning power, cervical model cleaning power, and feeling of use (risk).

This is presumed to be due to the fact that as a plurality of appearances constituting the bundle of stitches, a plurality of cut surfaces are almost equal in area in the direction in which the outline of the outward appearance is formed, and the thickness of the cut end after cutting is uniform .

From the results of Test Examples 1 to 4 shown in Table 1, the toothbrush U2 of Test Example 2 in which the length of the major axis of the elliptical cut surface formed on the appearance located at the vertex of the cone portion was 0.086 mm was found to have a model cleaning power, Risk) was the best in all evaluations.

In this respect, in order to obtain the best results in all evaluations of model cleaning power, cervical model cleaning power, and feeling of use (risk), even though the length of the long axis of the elliptical cut surface formed in the appearance of the cone part is short , 0.045 ㎜), and longness (0.134 ㎜ in this evaluation test), and it was confirmed that there is a proper numerical range.

Further, from the results shown in Table 1, when the length of the long axis of the elliptical cut surface formed in the appearance located at the vertex of the cone portion becomes short (0.045 mm in this evaluation test), the feeling of use is good .

On the other hand, it was confirmed that when the length of the long axis of the elliptical cut surface formed on the appearance located at the vertex of the cone portion is larger than 0.117 mm (for example, 0.134 mm), the interdental model cleaning power and the feeling of use (risk) deteriorate.

This is thought to be due to the fact that the shape of the elliptical cut surface formed in the tapered moiety disposed on the outer circumferential portion of the conical portion becomes larger and the impression of contact with the gum is closer to the straight moiré.

INDUSTRIAL APPLICABILITY The present invention can be used for a toothbrush which is excellent in entrapment property into a periodontal pocket or an interdental space, can reduce the risk to the gum, and has excellent jig removal performance.

10: toothbrush 11: handle
14: Moda 14-1:
14-2: Columnar section 14-3: Conical section
14-3a: side 14-3b: bottom surface
16: head portion 16a:
17: handle portion 18: neck portion
19: flocking hole 21: anti-slip part
23, 23-1, 23-2: tapered patterns 23a, 23-1a, 23-2a:
25: Structure d: Depth
E ₁ , E ₂ : Long axis H ₁ , H ₂ , H ₃ : Height
T ₁ : Vertex T ₂ : Fleet
θ: apical angle

Claims (4)

A head portion having a hair-removal hole disposed on one side,
And a hair bundle which is formed on the hair-kneading hole and is made of a plurality of pieces and has a conical portion in a conical shape at the tip portion,
Wherein the plurality of features have an elliptical cut surface constituting a side surface of the conical portion,
Wherein a length of the major axis of the ellipse is shortened as the cutting surface faces the apex of the conical portion from the outer circumferential edge of the bottom surface of the conical portion. The method according to claim 1,
Wherein the plurality of features are tapered,
Wherein the conical portion is disposed in a plurality of tapered tapered portions. 3. The method according to claim 1 or 2,
Wherein the apex angle of the cone is in the range of 60 ° to 80 °. 4. The method according to any one of claims 1 to 3,
Wherein a range of the long axis of the cut surface of the appearance located near the apex of the conical portion among the plurality of appearances is 0.080 to 0.120 mm.

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