KR20230120630A - toothbrush - Google Patents

Abstract

An object of this invention is to provide the toothbrush which can suppress the movement of hair to below the yield point of hair material. A head portion having a hair transplant surface and a handle portion connected to the head portion are provided. The head portion, as viewed from the front side facing the tufted surface, has a plurality of tufted portions provided in an independent surface shape with a single hair bundle in the tufted area, and the area of the tufted area surrounded by the outline connecting the outermost periphery of the plurality of tufted portions The ratio of the total area of the plurality of hair follicles to the hair is 70% or more and 99% or less. The plurality of hair-planting portions have opposite hair-planting portions that oppose each other through a gap having an extension width of 1 mm or less linearly. The ratio with respect to the total area of the plurality of planting parts of the total area of the opposing hair transplanting part is 70% or more. Among the regions surrounded by the contours connecting the outermost periphery of the opposing tufted portion, the area of the largest region is 50 mm2 or more, and the number of hairs per unit area of the tufted surface is 20/mm2 or more and 80/mm2 or less.

Description

toothbrush

The present invention relates to a toothbrush.

This application claims priority based on Patent Application No. 2020-214445 for which it applied to Japan on December 24, 2020, and uses the content here.

BACKGROUND ART It is known that when a toothbrush is used for a long period of time, bristle spread occurs, and the cleaning effect originally possessed by the toothbrush is reduced.

Regarding hair breakage, a toothbrush in which bristle breakage durability is secured by using polyester hair and bristle breakage durability is improved by using a soft resin in the periphery of the opening where bristle breakage in the handle body is likely to occur is disclosed. There is (for example, Patent Document 1).

However, in the prior art described above, it is necessary to use the hair of a specific material, and there is a problem that the material of the hair lacks versatility.

Further, a document in which the durability of hair splitting is improved by defining the type depth of a flat line is disclosed (for example, Patent Literature 2).

Japanese Unexamined Patent Publication No. 2007-6937 Japanese Unexamined Patent Publication No. 2018-183275

However, when a space exceeding the yield point of the hair material exists between the hairs, the hairs move too much, and hair opening may occur.

The present invention has been made in view of the above points, and an object of the present invention is to provide a toothbrush capable of suppressing the movement of hair to the yield point or less of the hair material.

According to a first aspect of the present invention, a head portion having a hair transplant surface and a handle portion connected to the head portion, wherein the head portion, when viewed from the front side facing the hair transplant surface, has a single hair in the hair transplant area. The ratio of the total area of the plurality of hair follicles to the area of the hair region surrounded by the contour connecting the outermost periphery of the plurality of hair transplant portions provided in a bundle and in the shape of an independent surface is 70% or more and 99%. Hereinafter, the plurality of hair transplanting portions have opposite hair transplanting portions that face each other through a gap having an extension width of 1 mm or less linearly, and the total area of the opposing hair transplanting portion has a ratio of 70% to the total area of the plurality of hair transplanting portions. As above, the area of the largest region among the regions surrounded by the contour connecting the outermost periphery of the opposing hair-flocking part is 50 mm2 or more, and the number of hairs per unit area of the hair-flocking surface is 20 / mm or more and 80 / mm or less. A characterized toothbrush is provided.

Furthermore, in the toothbrush according to one embodiment of the present invention, the plurality of hair transplanting portions include a first hair transplant portion having a minimum width of 3 mm or more and an area of 5 mm 2 or more, and a minimum width of less than 3 mm and an area of less than 15 mm 2 And, it is characterized in that it has a second planting portion of a rectangular shape when viewed from the front.

Furthermore, in the toothbrush according to one aspect of the present invention, a plurality of the first hair-flocking portions are disposed in the direction of the long axis of the head portion.

Furthermore, in the toothbrush according to one embodiment of the present invention, the second tufting portion is characterized in that a long side faces the first tufting portion.

Furthermore, in the toothbrush according to one aspect of the present invention, the first tufting portion and the second tufting portion are alternately arranged in the long axis direction.

Furthermore, in the toothbrush according to one embodiment of the present invention, the minimum width is less than 3 mm, and the third hair follicle has an area of 5 mm2 or more and 30 mm2 or less. It is characterized by facing wealth.

Further, in the toothbrush according to one aspect of the present invention, the third hair transplanting portion extends in a direction along the long axis direction, and is parallel to the hair transplant surface and is the outermost outermost side in the width direction orthogonal to the long axis direction. It is characterized in that it is arranged facing at least one of the 1st tufting part and the said 2nd tufting part.

Furthermore, in the toothbrush according to one embodiment of the present invention, at least one side of at least one of the first tufting portions is convexly curved toward the outer circumference of the head portion.

In the present invention, the movement of the hair can be suppressed below the yield point of the hair material.

1 is a partial front view of a toothbrush 1 according to a first embodiment of the present invention.
Fig. 2 is a partial front view of a toothbrush 1 according to a second embodiment of the present invention.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of the toothbrush of this invention is described with reference to FIG. 1 and FIG.

In addition, the following embodiment shows one aspect of this invention, and it does not limit this invention, It can change arbitrarily within the range of the technical idea of this invention. In the following drawings, in order to make each configuration easy to understand, the actual structure and the scale, number, etc. of each structure are different.

[First Embodiment of Toothbrush]

1 is a partial front view of a toothbrush 1 according to a first embodiment.

The toothbrush 1 has a head part 3 having a hair transplant surface 2 and a handle part 4 connected to the head part 3 . The head part 3 has the hair transplant surface 2 on the front side. The head part 3 is located at the distal end side of the handle part 4 in the long axis direction (left-right direction in FIG. 1).

In the following description, the direction parallel to the hair transplant surface 2 and orthogonal to the major axis direction (vertical direction in Fig. 1) will be described as the minor axis direction. Among the short axis directions, the upper side in FIG. 1 is referred to as one side in the width direction, and the lower side in FIG. 1 is referred to as the other side in the width direction. In addition, the side facing the hair transplant surface 2 is called the front side, and the side opposite to the front side is referred to as the back side, and is appropriately described. Regarding the long axis direction, let the side on which the head portion 3 is disposed with respect to the handle portion 4 be referred to as the front end side, and the side on which the handle portion 4 is disposed is referred to as the rear end side.

The head part 3 is, as an example, an elliptical shape extending in the long axis direction when viewed from the front side. The shape seen from the front of the head portion 3 is not limited to an elliptical shape, and an arbitrary shape such as an elliptical shape or a rectangular shape can be selected. The head part 3 has a plurality of the plurality of hair transplanting parts 10 on the hair transplanting surface 2 . The hair planting part 10 is provided in the shape of an independent surface with a single hair bundle. The planting unit 10 includes a plurality of first planting units A1, A2, and A3, a plurality of second planting units B1, B2, and B3, and a plurality of third planting units C1 and C2. there is.

The 1st hair transplant parts A1, A2, A3 are arrange|positioned in the long axis direction at the center position of a short axis direction. 1st hair follicle part A1, A2, A3 sets smooth site|parts, such as a tooth surface, as cleaning object mainly. 1st hair-flocking parts A1, A2, A3 are provided for the purpose of improving hair splitting durability by suppressing the movement of hair below the yield point of hair material, maintaining brushing property. Each of the first hair transplant portions A1, A2, and A3 has a minimum width of 3 mm or more and an area of 5 mm 2 or more, and has a rectangular shape extending in the direction of the minor axis when viewed from the front. As for the area of 1st hair transplant part A1, A2, A3, it is more preferable that it is 20 mm<2> or more, respectively.

The second hair transplant portions B1, B2, and B3 each have a minimum width of less than 3 mm and an area of less than 15 mm 2 , and are rectangular in shape extending in the direction of the short axis when viewed from the front. The 2nd hair follicle part B1, B2, B3 mainly makes an interdental cleaning object. The second bristling parts (B1, B2, B3) are excellent in interdental insertability, while improving the fit to the row of teeth including the interdental, while suppressing the movement of the hair to the yield point or less of the hair material, the hair splitting durability It is provided for the purpose of improvement. As for the area of 2nd hair follicle part B1, B2, B3, it is more preferable that it is 10 mm<2> or less, respectively from a viewpoint of the fit property with respect to a row of rows. The second hair-planting parts B1, B2, and B3 are arranged in a row in the major axis direction at the central position in the minor axis direction, respectively. The first tufting parts A1, A2, and A3 and the second tufting parts B1, B2, and B3 are sequentially arranged alternately in the long axis direction.

The 3rd hair transplanting parts C1 and C2 are mainly cleaning the tooth neck part. The third hair-transplantation portions C1 and C2 are excellent in insertability into the tooth neck portion and improve fit to the teeth while suppressing the movement of the hair below the yield point of the hair material to improve hair splitting durability. The 3rd planting part C1, C2 has a minimum width of less than 3 mm, respectively, and an area of 5 mm2 or more and 30 mm2 or less. As for the area of the 3rd hair transplant part C1, C2, it is more preferable that it is 10 mm<2> or more and 20 mm<2> or less, respectively. The third hair planting portions C1 and C2 are convexly curved outward in the minor axis direction of the head portion 3 and have a shape in which two curves extending along the major axis direction are connected in the major axis direction. The third hair transplanting portions C1 and C2 are disposed on the outermost side in the short axis direction.

The 1st tufting part A1 located at the most distal end side in the long axis direction opposes the 2nd tufting part B1 via the clearance gap 51. The gap 51 has a width of 1 mm or less and extends linearly in the direction of the minor axis. The four corner parts of the 1st hair transplant part A1 are respectively R-chamfered.

The 1st tufting part A2 is arrange|positioned at the rear end side of the long axis direction of the 2nd tufting part B1. The first tufting portion A2 is opposed to the second tufting portion B1 through the gap 52 in the long axis direction. That is, the long side of the 2nd tufting part B1 opposes the 1st tufting part A2 via the clearance gap 52. The gap 52 has a width of 1 mm or less (0.4 mm as an example) and extends linearly in the direction of the minor axis.

At the rear end side of the long axis direction of the first hair transplant portion A2, the second hair transplant portion B2 is disposed. The first tufting portion A2 is opposed to the second tufting portion B2 through the gap 53 in the long axis direction. That is, the long side of the 2nd tufting part B2 opposes the 1st tufting part A2 via the clearance gap 53. The gap 53 has a width of 1 mm or less (0.4 mm as an example) and extends linearly in the direction of the minor axis.

As for the 1st hair transplant part A2, at least one side is curved convexly toward the outer periphery of the head part 3. As for the 1st hair transplant part A2, the side of both sides in the short axis direction curves convexly toward the outer periphery of the short axis direction of the head part 3. The 1st tufting part A2 opposes the 3rd tufting part C1 via the clearance gap 58 and one side of a short axis direction. The gap 58 has a width of 1 mm or less (0.4 mm as an example), is curved convexly curved outward in the minor axis direction of the head portion 3, and extends along the major axis direction. The 1st tufting part A2 opposes the 3rd tufting part C2 via the clearance gap 59 and the other side of short axis direction. The gap 59 has a width of 1 mm or less (0.4 mm as an example), is curved convexly curved outward in the minor axis direction of the head portion 3, and extends along the major axis direction.

Therefore, the 1st tufting part A2 opposes the 2nd tufting part B1, B2 in the long-axis direction via the gap 52, 53, and the 3rd tufting part C1, through the gap 58, 59 C2) and is opposite in the direction of the long axis.

The 1st tufting part A3 is arrange|positioned at the rear end side of the long axis direction of the 2nd tufting part B2. The first tufting portion A3 is opposed to the second tufting portion B2 through the gap 54 in the long axis direction. That is, the long side of the 2nd tufting part B2 opposes the 1st tufting part A3 via the clearance gap 54. The gap 54 has a width of 1 mm or less (0.4 mm as an example) and extends linearly in the direction of the minor axis.

At the rear end side of the long axis direction of the first hair transplanter A3, the second hair transplanter B3 is disposed. The 1st tufting part A3 opposes the 2nd tufting part B3 via the clearance gap 55 in the long axis direction. That is, the long side of the second tufting portion B3 is opposed to the first tufting portion A3 via the gap 55 . The gap 55 has a width of 1 mm or less (0.4 mm as an example) and extends linearly in the direction of the minor axis.

As for the 1st hair transplant part A3, at least one side is curved convexly toward the outer periphery of the head part 3. As for the 1st hair transplant part A3, the side of both sides in the short axis direction curves convexly toward the outer periphery of the short axis direction of the head part 3. The 1st tufting part A3 opposes the 3rd tufting part C1 via the gap|interval 62 and one side of a short axis direction. The gap 62 has a width of 1 mm or less (0.4 mm as an example), is curved convexly curved outward in the minor axis direction of the head portion 3, and extends along the major axis direction. The 1st tufting part A3 opposes the 3rd tufting part C2 via the clearance gap 63 and the other side of short axis direction. The gap 63 has a width of 1 mm or less (0.4 mm as an example), a curved shape that curves convexly toward the outside of the minor axis direction of the head portion 3, and extends along the major axis direction.

Therefore, the 1st tufting part A3 opposes the 2nd tufting part B2, B3 in the long-axis direction through the gap 54, 55, and the 3rd tufting part C1, through the gap 62, 63 C2) and is opposite in the direction of the long axis.

The 3rd tufting part C1 is sequentially from the front end side in the long axis direction, 2nd tufting part B1, 1st tufting part A2, 2nd tufting part B2, 1st tufting part A3, and It opposes 2 hair transplant parts B3 and the short axis direction, respectively. More specifically, the third tufting portion C1 is opposed to the second tufting portion B1 in the short axis direction via the gap 56 at the tip in the long axis direction. The gap 56 has a width of 1 mm or less (0.4 mm as an example) and extends linearly in the long axis direction.

The 3rd tufting part C1 opposes the 1st tufting part A2 in the short axis direction through the clearance gap 58 at the rear end side of the long axis direction rather than the 2nd tufting part B1. The 3rd tufting part C1 faces the 2nd tufting part B2 in the short axis direction through the clearance gap 60 at the rear end side of the long axis direction rather than the 1st tufting part A2. The gap 60 has a width of 1 mm or less (0.4 mm as an example) and extends linearly in the long axis direction. The 3rd tufting part C1 opposes the 1st tufting part A3 in the short axis direction through the clearance gap 62 at the rear end side of the long axis direction rather than the 2nd tufting part B2. The 3rd tufting part C1 faces the 2nd tufting part B3 and short axis direction through the clearance gap 64 at the rear end side of the long axis direction rather than the 1st tufting part A3. The gap 64 has a width of 1 mm or less (0.4 mm as an example) and extends linearly in the long axis direction.

The 3rd planting part C2 is sequentially from the front end side in the long axis direction, the 2nd planting part B1, the 1st planting part A2, the 2nd planting part B2, the 1st planting part A3, and the 2nd planting part B1. It opposes 2 hair transplant parts B3 and the short axis direction, respectively. More specifically, the third tufting portion C2 faces the second tufting portion B1 in the short axis direction via the gap 57 at the tip in the long axis direction. The gap 57 has a width of 1 mm or less (0.4 mm as an example) and extends linearly in the long axis direction.

The 3rd tufting part C2 faces the 1st tufting part A2 and short axis direction through the clearance gap 59 at the rear end side of the long axis direction rather than the 2nd tufting part B1. The 3rd tufting part C2 opposes the 2nd tufting part B2 and short axis direction through the clearance gap 61 at the rear end side of the long axis direction rather than the 1st tufting part A2. The gap 61 has a width of 1 mm or less (0.4 mm as an example) and extends linearly in the long axis direction. The 3rd tufting part C2 opposes the 1st tufting part A3 in the short axis direction via the clearance gap 63 at the rear end side of the long axis direction rather than the 2nd tufting part B2. The 3rd tufting part C2 faces the 2nd tufting part B3 and short axis direction via the clearance gap 65 at the rear end side of the long axis direction rather than the 1st tufting part A3. The gap 65 has a width of 1 mm or less (0.4 mm as an example) and extends linearly in the long axis direction.

Therefore, the 3rd tufting part C1 and the 3rd tufting part C2 have a side longer than the side facing the 2nd tufting part B1, the 2nd tufting part B2, and the 2nd tufting part B3 ( curve) is opposed to the first tufting portion A2 and the first tufting portion A3, respectively.

As described above, the first hair transplanting parts A1, A2, and A3, the second hair transplanting parts B1, B2, and B3, and the third hair transplanting parts C1, C2 constituting the hair transplanting unit 10 are all It constitutes an opposing planting part that opposes at least one of the other planting parts 10 through at least one of the gaps 51 to 65 having a width of 1 mm or less. That is, in this embodiment, the total area of the opposing tufting part is the total area of the tufting part 10. Therefore, in the present embodiment, the total area of the opposing hair region of the hair transplant surface 2 including the gaps 51 to 65 surrounded by the outline connecting the outermost periphery of the opposing tufting portion is It is the area of the largest region among the regions enclosed by the outline. In addition, by providing a gap of 1 mm or less between each of the first planting parts A1, A2, and A3, the second planting parts B1, B2, and B3, and the third planting parts C1 and C2. , While making the hair bundle of each hair part independent and clarifying the above role, (by narrowing the gap width), while maintaining the crushability of the entire hair planting part, the movement of the hair is suppressed below the yield point of the hair material, and the hair spreads durability can be improved.

The area of the largest region among the regions surrounded by the contours connecting the outermost periphery of the opposing hair-planting portion is preferably 50 mm2 or more, more preferably 100 mm2 or more, from the viewpoint of improving hair splitting durability and improving fit to the row of teeth. , more preferably 150 mm 2 or more.

Among the regions surrounded by the outermost contours connecting the opposing hair follicles, when the area of the largest region is less than 50 mm 2 , the ratio of hairs that move beyond the yield point of the hair material increases, and there is a possibility that the hair splitting durability is reduced.

Hair breakage durability can be improved by setting the area of the largest region among the regions surrounded by the contours connecting the outermost peripheries of the opposing hair-flocking section to 50 mm 2 or more.

The ratio (hair density) of the total area of the hair bundle of the tufted portion 10 to the total area of the tufted region 10A is preferably 70% or more and 99% or less, and more preferably 80% or more and 99% or less. . When the ratio of the total area of the hair planting portion 10 is less than 70%, the area occupied by the gap increases, and the possibility that a space exceeding the yield point of the hair material exists between the hairs increases, and the hair splitting durability decreases. There is a possibility that the fitability to the product may deteriorate. When the ratio of the total area of the hair-flocking part 10 exceeds 99%, there is a possibility that the space where the hair moves is too small and the brushing property decreases. By setting the ratio of the total area of the tufting portion 10 to 70% or more and 99% or less with respect to the area including the gaps 51 to 65 surrounded by the outline connecting the outermost periphery of the tufting portion 10, the descaling property While maintaining, while suppressing the movement of the hair below the yield point of the hair material to improve the hair opening durability, it is possible to improve the fit of the teeth.

It is preferable that the ratio with respect to the total area of the hair-flocking part 10 of the total area of the opposing hair-flocking part is 70% or more (100% in this embodiment) from a viewpoint of improving hair splitting durability.

When the ratio of the total area of the opposing hair transplant to the total area of the hair follicle 10 is less than 70%, the ratio of the hair that moves beyond the yield point of the hair material increases, and there is a possibility that the hair splitting durability is reduced.

By setting the ratio of the total area of the opposing hair follicle to the total area of the hair planting portion 10 to 70% or more, the rate of hair moving beyond the yield point of the hair material can be suppressed, and the hair splitting durability can be improved. .

When there is a non-opposite tufted portion that does not correspond to the opposing tufted portion in the tufted portion 10, it is preferable to make the ratio of the total area of the non-facing tufted portion to the total area of the tufted portion 10 10% or less. . When there are a plurality of non-opposite hair follicles, it is preferable from the viewpoint of reducing the ratio of the hair that moves beyond the yield point of the hair material to dispersively arrange and not aggregate.

The number of hairs per unit area of the tufted surface 2 including the head edge portion is preferably 20/mm or more and 80/mm or less, more preferably 25/mm or more and 70/mm or less, and 30/mm 2 or more. It is more preferable that they are mm<2> or more and 70 pieces/mm<2> or less.

When the number of hairs per unit area of the hair transplanted surface 2 including the head edge portion is less than 20/mm 2 , the ratio of hairs that move beyond the yield point of the hair material increases, and there is a possibility that the hair splitting durability is reduced. When the number of hairs per unit area of the hair-flocking surface 2 including the head edge portion exceeds 80 pieces/mm 2 , the space where the hair material moves is reduced, and there is a possibility that the fit to the row of teeth is lowered.

The width of the gaps 51 to 65 is preferably 1 mm or less, more preferably 0.8 mm or less, still more preferably 0.5 mm or less, as described above.

By making the width|variety of the clearance gaps 51-65 into 1 mm or less, the space exceeding the yield point of the hair material can be reduced and bristling durability can be improved.

As the hair constituting the hair bundles of the first tufting parts A1, A2, and A3, the second tufting parts B1, B2, and B3, and the third tufting parts C1, C2, straight hair or hair toward the tip Examples include hair having a gradually smaller diameter (taper hair), branched hair at the tip, spiral hair, hair having a deformed cross-section, and the like. From the viewpoint of the cleaning effect of the periphery of the straightener or the tooth neck, the hair constituting the hair bundle is preferably tapered hair. By making the bristles tapered, the cleaning effect can be improved by making the tips of the bristles touch the small portion while securing the scraping force. As for the tip shape of a hair bundle, a flat section, an angular section, a convex shape, a concave shape, etc. are mentioned. By making the shape of the tip of a hair bundle into a ridge or hill shape, the cleaning effect can be improved by making the hair tip touch a small part.

The bristle bundle is not particularly limited in terms of the material of the brush, but is, for example, polyamide (e.g., 6-12 nylon, 6-10 nylon), polyester (e.g., polyethylene terephthalate, polybutylene terephthalate). , polytrimethylene terephthalate), polyolefins (eg, polypropylene), and elastomers (eg, olefin-based, styrene-based) and the like. Further, a plurality of these resin materials may be used in combination, and different resin materials may be used for the core portion and the sheath portion, such as a core-sheath structure or the like.

The hair diameter of the hair constituting the hair bundle is, for example, 4 to 7 mil (1 mil = 1/1000 inch = 0.025 mm). When it is 4 mil or more, hair elasticity capable of cleaning the tooth cervical region satisfactorily is secured, and when it is 7 mil or less, flexibility capable of alleviating irritation to the gums and the like is secured. In addition, the hair diameter in tapered hair is the diameter in a root part.

The material of the handle portion 4 is not particularly limited, and examples thereof include polypropylene (PP) resin, polyacetal (POM) resin, polybutylene terephthalate (PBT) resin, and polyethylene terephthalate (PET). It is preferable to use a resin or the like.

As a method of fixing the hair bundles of the first hair transplanting parts A1, A2, A3, the second hair transplanting parts B1, B2, B3 and the third hair transplanting parts C1, C2 to the hair transplanting surface 2, A thermal fusion method (pressure-temperature-time (PTt) method) in which the molten portion of the lower end is press-fitted into the molten resin to be the head portion 3 and fixed. After heating the lower end of the hair bundle to form a molten lump, the molten resin is An in-mold method or the like in which the head is molded by injecting into a mold may be used.

As described above, in the toothbrush 1 of the present embodiment, while being able to suppress the movement of the hair below the yield point of the hair material and improving the bristle splitting durability, the fitting property with respect to the teeth can be improved.

[Second Embodiment of Toothbrush]

Subsequently, a second embodiment of the toothbrush 1 will be described with reference to FIG. 2 .

In this figure, the same reference numerals are given to elements identical to those of the first embodiment shown in Fig. 1, and descriptions thereof are omitted.

2 is a partial front view of the toothbrush 1 according to the second embodiment.

The hair transplant unit 10 of the present embodiment includes first hair transplant units A2 and A3, second hair transplant units B1 and B3, third hair transplant units C11, C12, C21 and C22, and a plurality of hair transplant units. It has 4 hair transplant parts (D).

That is, in the hair follicle 10 of the present embodiment, the first hair follicle A1 and the second hair follicle B2 are not provided, and the third hair follicles C11, C12, C21, and C22 separated in the long axis direction are not provided. ) and a point where a plurality of fourth hair transplanting portions D are provided differs from the first embodiment.

In the hair transplant unit 10 in this embodiment, the first hair transplant unit A2 is divided into two in the short axis direction by the gap 66, and the first hair transplant unit A3 is divided in the minor axis direction by the gap 67. is divided into two. The gap 66 has a width of 1 mm or less, is located in the center of the minor axis direction, and extends linearly in the major axis direction to divide the first hair transplant portion A2 into two. The gap 67 has a width of 1 mm or less, is located in the center of the short axis direction, and extends in a straight line in the long axis direction to divide the first tufting portion A3 into two.

The tufting unit 10 in this embodiment includes a third tufting unit C11 opposed to one side of the minor axis direction of the 1st tufting unit A2 via a gap 58, and the first tufting unit A2 ) The 3rd tufting part C21 which opposes through the gap 59 on the other side of the short axis direction of , and the 3rd tufting part C21 which opposes through the gap 62 on one side of the short axis direction of the 1st tufting part A3 It has part C12 and the 3rd tufting part C2 which opposes via the clearance gap 63 to the other side of the short axis direction of 1st tufting part A3.

The 4th hair transplant part D is circular in front view. The 4th tufting part D is arrange|positioned with a space|interval between the 1st tufting part A2 and the 1st tufting part A3 in the long axis direction. The 4th hair transplant part D is arrange|positioned in multiple numbers (seven in FIG. 2) at intervals in the short axis direction.

Other configurations are the same as those of the first embodiment.

In this embodiment, it is a linear shape between the 1st tufting parts A2, A3 and the 4th tufting part D, and between the 3rd tufting parts C11, C12, C21, C22, and the 4th tufting part D As a result, a gap with an extension width of 1 mm or less is not provided. Therefore, the plurality of fourth hair-flocking portions D do not constitute opposing hair-floating portions. Therefore, in the present embodiment, the opposing hair transplant region is surrounded by the outline connecting the outermost peripheries of the first hair transplant unit A2, the second hair plant unit B1, and the third hair planting portions C11 and C21 constituting the opposing hair transplant unit. The opposing hair transplant region surrounded by the outline connecting the area of (10B) and the outermost peripheries of the first hair transplant portion A3, the second hair transplant portion B3, and the third hair transplant portions C12 and C22 constituting the opposing hair transplant portion ( 10C), the larger area is 50 mm 2 or more.

In the toothbrush 1 of this embodiment, the larger area of the area of the opposing hair region 10B and the area of the opposing hair region 10C is used as the area of the opposing hair region, as described in the first embodiment. By satisfying the relationship, while being able to reduce the space exceeding the yield point of the hair material and improving the bristling durability, it is possible to improve the fit of the teeth.

[Example]

Hereinafter, the effects of the present invention will be further clarified by examples. In addition, the present invention is not limited to the following examples, and can be implemented with appropriate changes without changing the gist thereof.

(Examples 1 to 8, Comparative Example 1)

In this example, toothbrush samples of Examples 1 to 8 and Comparative Example 1 were prepared according to the specifications shown in Table 1, Table 2, and Table 3 below.

Each part of the toothbrush of each case was made into the dimensions shown in Table 1 and Table 2. The hair was adjusted to a diameter of 6 mil and PF 80%, and PP resin was used as the resin of the handle portion.

The sample of Example 1 was taken as a sample of the toothbrush having the hair-flocking part demonstrated in the said 1st Embodiment. Compared with the sample of Example 1, the sample of Examples 2-4 was set as the sample of the toothbrush which had the hair transplant part which changed the width|variety of the gap. Compared with the sample of Example 3, in the sample of Example 5, a gap extending in the long axis direction is added to the center of the short axis direction of the first tufting portions A2 and A3, and the first tufting portions A2 and A3 are It was set as the sample of the toothbrush which each had the hair transplant part divided into two in the short axis direction. Compared with the sample of Example 5, the sample of Example 6 was set as the sample of the toothbrush which has the hair-flocking part which does not provide the 1st hair-flocking part A1. As the sample of Example 7, the toothbrush having the hair-flocking part described in the second embodiment was taken as a sample. Compared with the sample of Example 3, in the sample of Example 8, the first tufting unit A3, the second tufting units B2 and B3, and the third tufting units C12 and C22 described in the second embodiment are It was set as the sample of the toothbrush which has the provided hair transplant part. Compared with the sample of Example 1, the sample of the comparative example 1 was set as the sample of the toothbrush which had the hair transplant part which changed the width|variety of the gap.

[Assessment Methods]

(1) Durability of toothbrush bristles

[Test Methods]

After 10 expert panelists used the toothbrush for a long period of time (3 months), the hair tip width L1 in the minor axis direction of the bristle bundle before use and the bristle tip width L2 in the minor axis direction of the bristle bundle after use were measured. The rate was calculated by the following formula.

Hair spreading rate (%) = (L2-L1) × 100/L1

<Evaluation Criteria>

◎ (double circle mark): The average value of hair splitting rate is less than 5%

○ (circle mark): The average value of the hair opening rate is 6 to 10%

× (cross mark): The average value of the hair splitting rate exceeds 10%

(2) Fit to the row of teeth

[Test Methods]

Evaluated by a sensory test using 10 expert panelists. 1 g of commercially available dentifrice was placed on the toothbrush shown in each Example and Comparative Example, and the fit to the teeth of the toothbrush when brushing was performed for 3 minutes was evaluated according to the following evaluation criteria.

The average score of 10 expert panelists was set as "◎" for an average score of over 4.0 points, "○" for an average score of 3.0 or more and less than 4.0 points, and "x" for an average score of less than 3.0, with ◎ or ○ for the fit of the toothbrush to the teeth of the toothbrush. It was judged that it was a toothbrush with good fit to the row of teeth at the time of teeth brushing.

<Evaluation Criteria>

5 points: "Fitness to dentition" is felt considerably.

4 points: "Fitness to dentition" is quite felt.

3 points: "Fitness to dentition" is sensed.

2 points: "Fitness to dentition" is slightly felt

1 point: "Fitness to dentition" is not felt at all.

As shown in [Table 1], [Table 2], and [Table 3], the ratio of the total area of a plurality of hair transplant parts is 70% or more and 99% or less, and the width of the gap extending linearly is 1 mm or less, The ratio of the total area of the opposing planting part to the total area of the plurality of planting parts is 70% or more, the area surrounded by the contour connecting the outermost periphery of the opposing planting part is 50 mm2 or more, and the number of hairs per unit area of the planting surface is 20 / mm 2 or more and 80 pieces / mm 2 or less in the samples of Examples 1 to 8, good evaluation was obtained in both "toothbrush bristle opening durability" and "fitness to dental fissures".

On the other hand, in the sample of Comparative Example 1 that does not satisfy the conditions that the ratio of the total area of the plurality of hair follicles is 70% or more and 99% or less and the width of the linearly extending gap is 1 mm or less, "Bristle breakage durability of the toothbrush", Favorable evaluation was not obtained for both of "fitness to dentition".

In addition, compared to the sample of Example 2, the evaluation of "fitness to dentition" was improved in the sample of Example 1 having a small gap width. In addition, compared to the samples of Examples 3 and 4, the evaluation of "toothbrush bristle opening durability" was improved in the samples of Examples 1 and 2 having a small gap width.

Compared to the sample of Example 7 in which a fourth planting portion D having a circular shape when viewed from the front, which is a non-opposing planting portion, is provided instead of the second planting portion B2, which is a facing hair transplanting portion, a practice having a second hair transplanting portion B2 In the sample of Example 6, the evaluation of "fitness to dentition" was improved.

As mentioned above, although preferred embodiment concerning this invention was described referring an accompanying drawing, it goes without saying that this invention is not limited to these examples. Formulations, combinations, etc. of each constituent member shown in the above examples are examples, and can be variously changed based on design requirements and the like within a range not departing from the main gist of the present invention.

This invention is applicable to a toothbrush.

1: toothbrush
2: hair removal side
3: head part
4: handle part
10: planting part
10A: hair follicle area
10B, 10C: opposing hair growth area
51 to 67: gap
A1, A2, A3: first planting part
B1, B2, B3: 2nd planting part
C1, C2: 3rd planting part

Claims (8)

A head portion having a hair transplant surface and a handle portion connected to the head portion,
the head part,
Seen from the front side facing the hair transplant surface, a plurality of hair transplant parts provided in the shape of an independent surface as a single hair bundle on the hair transplant surface,
The ratio of the total area of the plurality of hair transplanting parts to the area of the hair transplanted surface surrounded by the outline connecting the outermost peripheries of the plurality of hair transplanting parts is 70% or more and 99% or less,
The plurality of said hair-planting parts have opposing hair-planting parts facing each other through a gap having an extension width of 1 mm or less in a linear shape,
The ratio of the total area of the opposing hair-planting portion to the total area of the plurality of hair-planting portions is 70% or more,
Among the areas surrounded by the contour connecting the outermost periphery of the opposing planting portion, the area of the largest area is 50 mm or more,
Toothbrush, characterized in that the number of hairs per unit area of the bristling surface is 20 / mm 2 or more and 80 / mm 2 or less. The method of claim 1, wherein a plurality of said hair transplants,
A first planting portion having a minimum width of 3 mm or more and an area of 5 mm or more;
A toothbrush having a minimum width of less than 3 mm, an area of less than 15 mm 2 , and a second hair transplant portion having a rectangular shape when viewed from the front. The toothbrush according to claim 2, wherein a plurality of said first hair transplant parts are arranged in the direction of the long axis of said head part. The toothbrush according to claim 3, wherein a long side of the second hair-transplanting portion faces the first hair-transplanting portion. The toothbrush according to claim 4, wherein the first tufting portion and the second tufting portion are alternately arranged in the long axis direction. The method according to any one of claims 3 to 5, wherein the minimum width is less than 3 mm and the area is 5 mm 2 or more and 30 mm 2 or less, and has a third planting portion,
The said 3rd hair-transplanting part is the toothbrush with the side longer than the other side facing the said 1st hair-transplanting part. The method of claim 6, wherein the third tufting part extends in a direction along the long axis direction, and is parallel to the tufting surface and is outermost in a short axis direction orthogonal to the long axis direction, the first tufting part and the second tufting part. The toothbrush which is arrange|positioned facing at least one side of a hair transplant part. The toothbrush according to any one of claims 2 to 7, wherein at least one side of at least one of the first hair follicles is convexly curved toward the outer periphery of the head portion.

Images