KR20190007406A - toothbrush - Google Patents

Abstract

An object of the present invention is to provide a toothbrush which has a gentle massage sensation over a wide range of gums and secures high cleanness of a cervical portion. And a handle body 2 provided with a head portion 4 at its tip end. A plurality of knock-out holes formed in the knock-out face 5 of the head portion is provided with a ridge pattern. The inner peripheral face 11 is formed by arranging a plurality of inner footprints at substantially the center in the width direction orthogonal to the axial line and juxtaposed in the direction of the axis O of the handle body, The maximum length L of the entire hair-knee area in which a plurality of inward hair bundles and a plurality of outer-round hair knobs are formed in the width direction is 12.0 mm or more and 16.0 mm or less, And the maximum length of the inner flocking area in the width direction is not less than 4.0 mm and not more than 5.5 mm and the core diameter of the outer gathering foot is not less than 1.4 mm and not more than 1.8 mm. Mm, and the core diameter of the inner aggregate is not less than 1.0 mm and not more than 1.4 mm.

Description

toothbrush

The present invention relates to a toothbrush.

The present application claims priority based on Japanese Patent Application No. 2016-102298, filed on May 23, 2016, the contents of which are incorporated herein by reference.

For those who care about periodontal disease prevention, a toothbrush having a soft touch feeling that does not injure the gum as much as possible and having a high cleaning power of the cervical portion is preferable. In addition, recently, it has been revealed that the "gentle massage feeling on the gums" is important to the living. However, in the conventional periodontal disease prevention toothbrush, a compact head is the center, and in the case of a conventional brush, a sufficient amount of hair to be contacted to the gum is small, so that a sufficient massage effect is not obtained. Therefore, a toothbrush having a large foot contact with a wide range of gums and having a high cervical cleaning force is required.

Conventionally, there has been proposed a toothbrush which has a large hole diameter on the outer side, a dense dent density, and a very large dentition density ratio between the outer side and the inner side (see Patent Document 1) or a very fine- A toothbrush constituted by a flap area (patent document 2) has been proposed.

Japanese Patent Laid-Open Publication No. 2012-034845 Japanese Patent Application Laid-Open No. 2011-103952

However, the following problems exist in the conventional art as described above.

In order to reach a wide range of gums, it is necessary to make the head large in size. However, since the toothbrush described in Patent Document 1 is composed of a large-sized foot on the outside of the flocking portion, interference with the foot is great. As a result, only the tip contacts the gums, which makes efficient massaging difficult. In addition, when a bundle of hair is put on the hair-removing hole having a large hole diameter, since the end of the hair-removing device becomes a pencil shape (mountain shape), the hair contact with the gums becomes less and the massage becomes inefficient.

On the other hand, the toothbrush described in Patent Document 2 has a problem that it is not easy to bend because it has a very small outer footprint area and can not suppress warpage of the foot of the center flap area contributing to the cleaning of periodontal pocket, have. Further, the toothbrush described in Patent Document 2 has a problem that the cleaning ability of the cervical portion at the time of brushing the teeth and the gums at the same time is low because the ratio of the central flocking area to the peripheral flocking area is small.

The object of the present invention is to provide a toothbrush which has a gentle massage sensation on a wide range of gums and secures high cleaning performance of the cervical portion.

According to the first aspect of the present invention, there is provided a toothbrush comprising a handle provided with a head portion at a tip end, and a plurality of knockout holes formed in the knockout hole formed in the knockout surface of the head portion, An inner flocking region provided in a direction of the axial direction of the handle body and having a plurality of inner footprints formed at substantially the center in a width direction orthogonal to the axial direction and an inner flocking region in which a plurality of outer footprints are implanted in the widthwise direction, Wherein a maximum length of the entire hair-implanting area in which the plurality of inner patterns and the plurality of outer models are formed in the width direction is 12.0 mm or more and 16.0 mm or less, The maximum length of the area is 6.5 mm or more and 9.5 mm or less, and the maximum length of the inside footprint area in the width direction is 4.0 mm or more and 5.5 mm or less, Wherein the outer diameter of the outer joint is 1.4 mm or more and 1.8 mm or less and the core diameter of the inner joint is 1.0 mm or more and 1.4 mm or less.

Further, in the toothbrush according to an embodiment of the present invention, a value obtained by dividing the total number of appearances constituting the plurality of outside hair bundles by the area of the outer hair-covering area is an outer hair-covering density, Wherein a value obtained by dividing the total number of the features constituting the bundle by the area of the inner flocking area is an inner flock density and a flock density ratio represented by the outer flock density / inner flock density is not less than 1.4 and not more than 2.5.

Further, in the toothbrush according to the embodiment of the present invention, the length of the inner mold bundle on the knife-forming surface is longer than the length of the outer molding on the knife-forming surface.

Further, in the toothbrush according to the embodiment of the present invention, at least one of the inner bundle and the outer bundle includes features that gradually decrease in diameter toward the anterior end.

Further, in the toothbrush according to the embodiment of the present invention, the inner and outer mold bundles are arranged in a zigzag shape in which the positions of the mutually adjacent molds in the axial direction are shifted in the width direction , The maximum length of the entire hair-implanting area in the width direction is 12.0 mm or more and 15.0 mm or less, the maximum length of the outside hair-dressing area in the width direction is 7.0 mm or more and 9.5 mm or less, Wherein a value obtained by dividing the total number of the appearance constituting the bundle by the area of the outer flocking area is an outer flocking density and a value obtained by dividing the total number of the appearance constituting the plurality of inner bundles by the area of the inner flocking area, And a filling density ratio represented by an outer filling density / inner filling density is not less than 1.4 and not more than 2.0.

(Effects of the Invention)

In the present invention, it is possible to provide a toothbrush that has a gentle massage sensation over a wide range of gums, and secures high cleanness of the cervical portion.

1 is a plan view showing a head portion of a toothbrush according to an embodiment of the present invention.
2 is a left side view of the head portion of the toothbrush 1 shown in Fig.
3 is a plan view showing a head portion of a toothbrush according to an embodiment of the present invention.
Fig. 4 is a diagram showing the specifications and evaluation of the examples and comparative examples. Fig.

Hereinafter, embodiments of the toothbrush of the present invention will be described with reference to Figs. 1 to 4. Fig.

The following embodiments are illustrative of the present invention and do not limit the present invention, but can be arbitrarily changed within the technical scope of the present invention. In the following drawings, the actual structure and the scale and the number in each structure are made different in order to make each structure easy to understand.

The toothbrush of the present invention will be described below with reference to the drawings. Fig. 1 is a plan view showing a head portion of a toothbrush 1 according to an embodiment of the present invention, and Fig. 2 is a left side view of a head portion of the toothbrush 1 shown in Fig.

1, the toothbrush 1 includes a handle body 2. The handle body 2 has a long gripping portion (not shown) and a head portion 4 (not shown) provided at the tip of the gripping portion. ). 1, reference character O denotes a line passing through the center of the handle body 2, that is, the longitudinal direction of the handle body 2,

The head portion 4 has a substantially rectangular shape when viewed from a plane having a length in the direction of the axis O and has a wicking surface 5 on which an arbitrary surface is formed. A plurality of cylindrical inner holes (10 in FIG. 1) are formed along the axis O and the axis O along the axis O in FIG. The plurality of inner bristle holes 10 are arranged such that the positions of the inner bristle holes 10 adjacent to each other in the axial direction O are shifted in the width direction of the head portion 4 in a direction orthogonal to the axial direction O, Respectively. Inner matrix pieces (12) each having a plurality of inner appearance pieces (13) in a substantially columnar shape are formed in a plurality of inner brim holes (10), thereby forming an inner overlaid group (14). Therefore, the plurality of inner mold bundles 12 are arranged in a zigzag shape in which the positions of the inner mold bundles 12 adjacent to each other in the axial direction are displaced in the width direction of the head portion 4.

A plurality of (30 in the example shown in FIG. 1) cylindrical outer side openings 20 are formed along the axis O, And the outer hair shaft 22 is formed by arranging a plurality of outer appearances 23 in a substantially columnar shape in the outer hair shaft hole 20. The first outer gathering group 24a is constituted by fifteen outer male legs 22 provided along the side edge 6 of the head part 4 at the side of the head part 4, And the second outer bundle group 24b is constituted by fifteen outer bundles 22 provided along the edge 7. [ The plurality of outer brim holes 20 are arranged in a zigzag shape in which the positions of the outer brim 20 adjacent to each other in the direction of the axis O are shifted in the width direction of the head portion 4. Therefore, the plurality of outer female legs 22 are arranged in a zigzag shape in which the positions of the outer female legs 22 adjacent to each other in the direction of the axis O are shifted in the width direction of the head portion 4. The length t1 of the inner wick 12 on the wicking surface 5 is longer than the length w2 of the outer wick 22 on the wicking surface 5.

The inner mold surface area (11) indicating the area where the inner overhang (14) is provided is formed on the mold surface (5). The inner hair-kneading region 11 is an area surrounded by an annular line connecting the outer edge of the inner hair-kneading hole 10 in which the inner hair bundle 12 positioned at the outermost periphery of the inner-hair-gathering group 14 is woven. The annular line constitutes a common tangent line between the adjacent inner brim holes 10.

A first outer brim region 21a representing an area where the first outer overhanging group 24a is provided is formed on the molding wing 5. The first outer fringe region 21a is an area surrounded by an annular line connecting the outer edges of the outer fringe holes 20 in which the outer fringe 22 constituting the first outside aggregation group 24a is formed. The annular line constitutes a common tangent line between the adjacent outer brick holes 20 in the first outer brick group 24a.

In addition, a second outer flocking area 21b indicating an area in which the second outer overhanging group 24b is provided is formed in the food wick 5. The second outer hair-covering area 21b is an area surrounded by an annular line connecting the outer edge of the outer hair-removing hole 20 in which the outer hair bundle 22 constituting the second outer collecting group 24b is formed. The annular line constitutes a common tangent line between the adjacent outer brick holes 20 in the second outer brick group 24b. The inner mold part 12 is sandwiched in the width direction of the head part 4 by the first outer side hair part 21a and the second outer part hair part 21b so that the outer side hair part 22, (21).

The material of the handle 2 can be determined in consideration of the rigidity and mechanical characteristics required of the toothbrush 1, and for example, a high hardness resin having a flexural modulus (JIS K7203) in the range of 500 to 3000 MPa is used The mechanical characteristics required for the toothbrush 1 are obtained. Examples of the high hardness resin include polypropylene (PP), polyethylene terephthalate (PET), polycyclohexylenedimethylene terephthalate (PCT), polystyrene (PS), acrylonitrile butadiene styrene (ABS) (CP), polyarylate, polycarbonate, and acrylonitrile styrene (AS). One or more of these may be used.

The size of the head portion 4 can be determined in consideration of the maximum length of the inner and outer floating regions 11 and 21 in the width direction of the head portion 4 and operability in the oral cavity, The width (maximum width) W is 14 mm or more, for example, 14 to 18 mm, and the thickness T is 4 to 8 mm.

It is preferable that the maximum length L in the width direction of the head portion 4 of the entire facings area including the inner facial hair region 11 and the outer facial hair region 21 is 12.0 mm or more and 16.0 mm or less. If the maximum length L of the entire hair-knee area is less than 12.0 mm, a sufficient massage effect may not be obtained. If the maximum length L of the whole hair-removal area is more than 16.0 mm, there is a possibility that the resistance when the head part 4 enters the oral cavity is increased and the operability is lowered.

In the case where the inner pattern 12 and the outer pattern 22 are arranged in a zigzag shape as in the toothbrush 1 shown in Fig. 1, the inner and outer bristle regions 11 and 21 are included It is more preferable that the maximum length L in the width direction of the head portion 4 of the entire hair-knee area is 12.0 mm or more and 15.0 mm or less. When the inner and outer shrouds 12 and 22 are arranged in a zigzag shape, the inner shroud 12 and the outer shroud 22 can be installed at high density on the head 4, respectively Even if the maximum length is 15.0 mm or less, massage effect on the gum and good cleaning property for the cervical part can be secured.

It is preferable that the maximum length of the inner flocking area 11 in the width direction of the head part 4 is 4.0 mm or more and 5.5 mm or less. If the maximum length of the inner flap area 11 in the width direction is less than 4.0 mm, the good cleanness of the cervical region can not be sufficiently obtained, and the possibility that the sense of realism when the head part 4 enters the cervical region . If the maximum length of the inner flap area 11 in the width direction is more than 5.5 mm, it is difficult to secure the length of the outer hair follicle 22, and the massage effect on the gum can not be sufficiently secured.

The maximum length of the first outer covering area 21a in the width direction of the head part 4, that is, the maximum length of the first outer covering area 21a in the width direction of the head part 4, The sum of the maximum lengths of the regions 21b is preferably 6.5 mm or more and 9.5 mm or less. If the maximum length of the outer flap 21 in the width direction is less than 6.5 mm, the massage effect on the gum and the good cleaning property to the cervical portion may not be sufficiently secured. If the maximum length of the outer flocking area 21 in the width direction is more than 9.5 mm, the contact of the outer stems 22 with the gums becomes strong, and the smooth touching may be damaged.

The maximum length of the outer flocking area 21 in the width direction of the head part 4 is 7.0 mm or more and 9.5 mm or more in the case where the inner and outer stems 12 and 22 are arranged in a zigzag shape, Mm or less. When the inner and outer shrouds 12 and 22 are arranged in a zigzag shape, the inner shroud 12 and the outer shroud 22 can be installed at high density on the head 4, respectively The maximum length of the outer flocking area 21 can be set to 7.0 mm or more, and massage effect on the gums and good cleaning property against the cervical part can be improved.

The diameter D1 of the inner brim hole 10 can be determined according to the diameter of the inner brim 12, that is, the diameter of the cross section orthogonal to the longitudinal direction of the inner brim 12, . In the present embodiment, the diameters D1 of all the inner brim holes 10 are substantially equal. Roughly equivalent means that all the diameters D1 are included in the range of 占 5%.

In addition, the diameter D2 of the outer brim 20 can be determined according to the diameter of the outer brim 22, for example, 1.4 to 1.8 mm. In the present embodiment, the diameters D2 of all the outer brick-forming holes 20 are substantially equal. Roughly equivalent means that all diameters (D2) are included in the range of ± 5%.

The number of turns t1 of the inner sheath 12 can be determined in consideration of the material and thickness of the inner appearance 13 and is, for example, 6 to 15 mm. It is preferable that the diameter of the matrix bundle d1 of the inner matrix bundle 12, that is, the diameter of the cross section orthogonal to the longitudinal direction of the inner matrix bundle 12 is 1.0 mm or more and 1.4 mm or less. When the hair bundle diameter d1 of the inner hair bundle 12 is less than 1.0 mm, the hairiness as the inner hair bundle 12 becomes excessively low and the cleaning property of the cervical portion is lowered, and when the head portion 4 enters the cervical portion The real feeling of it becomes thin. When the matrix bundle diameter d1 of the inner mold bundle 12 is more than 1.4 mm, the tip of the inner bundle 12 is difficult to enter the fine portions such as the periodontal pocket and the tines and the cleaning property is deteriorated, The abutment of the abutment member 4 upon entering the cervical portion becomes too strong. When the hair bundle diameter d1 of the inner core bundle 12 is 1.0 mm or more and 1.4 mm or less, the sense of realization when the head portion 4 enters the cervical portion can be improved.

In the present embodiment, all of the inner core strands 12 have substantially the same cluster diameter d1. Roughly equivalent means that all the diameters d1 are included in the range of 占 5%.

The number of the inner appearance pieces 13 per one inner appearance bundle 12 can be determined in consideration of the diameter of the inner appearance of the inner appearance 13, for example, 10 to 40 pieces.

The matrix diameter d1 of the inner mold bundle 12 is the diameter at the boundary with the mold base 5 and is substantially equal to the diameter D1 of the inner mold bore 10. Approximately equivalent means the difference within ± 5%.

The value obtained by dividing the total number of the inner appearance parts 13 constituting the inner overhang group 14, that is, the total number of the inner appearance parts 13 constituting the inner overhang group 14, by the area of the inner overhang area 11 is not particularly limited , For example, 4 to 11 pieces / mm 2 is preferable, and 6 to 9 pieces / mm 2 is more preferable. If the inner covering density is less than 4 pieces / mm 2, the inner stems 12 are not supported by each other at the time of crushing, resulting in a low back waist and deterioration of the cleaning ability of the cervical portion. If the inner covering density is more than 11 pieces / mm 2, the interference between adjacent inner mold bundles 12 at the time of crushing becomes large, and the movement of the inner mold bundle 12 such as warp is excessively suppressed, ) Is inhibited.

The inner appearance (13) is an ST sham (super tapered dummy) whose tip ends are narrowed. The workpiece diameter of the inner workpiece 13 can be determined in consideration of the material and the like of the inner workpiece 13 and is, for example, 6 to 9 mil (1 mil = 1/1000 inch = 0.025 mm). When the distance is 6 mils or more, a waist that can clean the cervical portion satisfactorily is secured. When the distance is 9 mils or less, the flexibility to mitigate the irritation to the gums and the like is secured. The diameter of the figure in the ST model is the diameter in the base portion.

The length of the outer mold base 22 on the mold surface 5, that is, the length t2 can be determined in consideration of the material and thickness of the outer appearance 23 and is, for example, 6 to 13 mm.

The difference t3 in the number of turns of the inner strand 12 and the outer strand 22 is preferably 2.0 mm or less and more preferably 0.5 to 1.5 mm. When t1> t2, that is, when the tangent t1 of the inner strand 12 is large and the tangent t2 of the outer strand 22 is large, the cleaning property of the cervical portion and the feeling of contact with the gum can be further improved. It is also possible to improve the sensation when the head portion 4 enters the cervical portion by making the length of the inner hair bundle 12 on the hair styling surface 5 longer than the length on the hair styling surface 5 of the outer hair styling 22 .

It is preferable that the diameter of the bundle d2 of the outer bundle 22, that is, the diameter of the cross section perpendicular to the longitudinal direction of the outer bundle 22 is 1.4 mm or more and 1.8 mm or less. If the outer diameter of the outer bundle 22 is less than 1.4 mm, the contact area with the gums may be insufficient and a sufficient massage effect may not be obtained. If the cluster diameter d2 of the outer strand 22 is more than 1.8 mm, particularly when the head portion 4 is widened, the interference of the outer strand 22 is large and the strand is not bent. Therefore, only the tip of the outer hair shaft 22 comes into contact with the gums, and massage with high efficiency becomes difficult. In addition, if the outer diameter (d2) of the outer bundle 22 is more than 1.8 mm, the outer bundle of the bundle is lowered to a mountain-shaped bundle with respect to the hub of the bundle center, There is a possibility that massage does not come in contact with the gums.

If the outer diameter of the outer bundle 22 is more than 1.8 mm, the pressure applied to the gum from the distal end of the outer bundle 22 can not be dispersed at the time of brushing, The feeling of contact with the gum is reduced. The outer appearance 23 of the outer sheath 22 is excessively large in the interference with the outer appearance 23 constituting the same outer sheath 22 and the degree of freedom of movement It is damaged, which lowers the feeling of soft touch.

In the present embodiment, the clustered diameters d2 of all the outer stems 22 are substantially equal. Roughly equivalent means that all diameters (d2) are included in the range of ± 5%. The number of outer appearance 23 per one outer appearance 22 can be determined in consideration of the diameter of the appearance of the outer appearance 23 or the like and is, for example, 40 to 100.

The bundle diameter d2 of the outer mold bundle 22 is a diameter at the boundary with the mold base 5 and is substantially equal to the diameter D2 of the outer bleed hole 20.

A value obtained by dividing the total number of outer appearance figures 23 constituting the first outside aggregation group 24a by the area of the first outside facade area 21a is 10 / Lt; 2 > or more, more preferably 12 / mm < 2 > or more. When the density of the first outside aggregate group 24a is less than 10 pieces / mm < 2 >, it becomes difficult to disperse the pressure applied to the gum from the tip of the outside mold bundle 22 at the time of crushing.

The value obtained by dividing the total number of the outer appearance figures 23 constituting the second outer overhang group 24b by the area of the second outer overhang area 21b is equal to the sum of the first outer mod And is similar to that of the ball group 24a.

The dent density of the first outside aggregation group 24a and the dent density of the second outside aggregation group 24b may be the same or different. However, from the viewpoint of securing a soft touch feeling on any one of upper, lower, left, and right gingiva in the oral cavity at the time of tooth follicle, the filling density of the first outer-overhanging group 24a and the filling density of the second outer- Equivalent is preferable. Further, the term "roughly equivalent" means that the ratio expressed by [the first outer overlapping group forming density] / [the second outer overlapping group forming hair densifying density] is from 0.95 to 1.05.

The total number of outer appearance figures 23 constituting the second outer estimate group 24b is the same as the total number of outer appearance figures 23 constituting the first outer estimate group 24a. The total number of the outer appearance figures 23 constituting the first outer estimate group 24a and the total number of the outer appearance figures 23 constituting the second outer estimate group 24b may be the same or different. However, from the viewpoint of securing a soft touch feeling on any one of the upper, lower, left, and right gingiva in the oral cavity during the scarfing, the total number of the outer appearance pieces 23 constituting the first outer- It is preferable that the total number of outer appearance foils 23 constituting the outstanding group 24b is substantially equal. Further, it means that the ratio expressed by approximately equal (expressed as the total number of outer appearances constituting the first outside aggregation group / the total number of the outer appearance constituting the second outside aggregation group) is from 0.95 to 1.05.

The sum of the total number of outer appearance figures 23 and the total number of outer appearance figures 23 constituting the second outer-overset group 24b constituting the first outer-overset group 24a is referred to as the first outer- (Outer covering density) divided by the sum of the area of the second outer covering area 21b and the area of the second outer covering area 21b is preferably 10 / mm2 or more, more preferably 12 / mm2 or more. When the outer covering density is less than 10 pieces / mm < 2 >, it becomes difficult to disperse the pressure applied to the gum from the tip of the outer mold bundle 22 at the time of tooth firing.

It is preferable that the filling density ratio represented by [outside bristle density] / [inside bristle density] is not less than 1.4 and not more than 2.5. If the flocking density ratio is less than 1.4, there is a fear that the soft touch feeling is lowered due to the lowering of the pressure dispersion of the outer-most prevalent group, or the cleaning property of the cervical portion is lowered due to the excessive density of the inner joint feet. If the hair density ratio is more than 2.5, the inner waist of the inner overgrown group 14 is lowered and the cleaning property of the cervical portion is lowered. In other words, if it is within the above range, a soft contact feeling on the gum and a good cleaning property of the cervical portion can be achieved.

When the inner and outer shrouds 12 and 22 are arranged in a zigzag shape, it is preferable that the ratio of the fillet density represented by [outer tie density] / [inner tie density] is 1.4 to 2.0 . When the inner and outer shrouds 12 and 22 are arranged in a zigzag shape, the inner shroud 12 and the outer shroud 22 can be installed at high density on the head 4, respectively Even if the ratio of the stocking density is 2.0 or less, it is possible to sufficiently secure the soft touch and the good cleaning property of the cervical portion.

The outer appearance 23 is an ST (super tapered) shape in which the tip ends are narrowed in the same manner as the inner appearance 13. The diameter of the outer appearance 23 can be determined in consideration of the material and the like of the outer appearance 23 and is, for example, 4 to 7 mil (1 mil = 1/1000 inch = 0.025 mm). If it is 4 mil or more, sufficient independence is obtained. If it is 7 mil or less, stimulation to the gum can be sufficiently mitigated. The outer diameter of the outer appearance 23 is preferably smaller than that of the inner appearance 13. With such a configuration, it is possible to improve the cleaning property of the cervical portion by the inner appearance 13 while relieving the irritation to the gum by the outer appearance 23 which is likely to come into contact with the gum in the fastener.

According to the present embodiment, the inner flocking area 11 having a maximum width in the width direction of 4.0 mm or more and 5.5 mm or less is provided at the center of the wicking surface 5 in the width direction of the head part 4, The outer side flocking regions 21 having the maximum length in the width direction of 6.5 mm or more and 9.5 mm or less are provided on both sides of the inner side flocking area 11 in the width direction of the part 4, (D2) of the outer bundle (22) is 1.4 mm or more and 1.8 mm or less and the bundle diameter (d1) of the inner bundle (12) is 1.0 mm or more and 1.4 or more Mm, it is possible to provide a gentle massage feeling with a soft touch feeling to the gum by the wide inner wedge 12 and the outer wedge 22, as well as to provide a feeling of getting into the cervical portion of the head portion 4, The cleaning property can be ensured.

According to the present embodiment, since the ratio of the outer and outer dentin density to the inner dentin density is 1.4 to 2.5, the outer aggregate groups 24a and 24b, which are likely to come into contact with the gum at the time of the dentifrice, The pressure applied to the gum from the distal end of the bundle 22 is dispersed and the stimulation to the gum is relieved to obtain a feeling of soft and soft touching. In addition, the inside appearance 13 constituting the inner, It is possible to clean the cervical portion well.

According to the present embodiment, since the inner sheath 12 is longer than the outer sheath 22, it is possible to improve the sensation when the head 4 enters the cervical portion, and at the same time, Can be easily inserted into the periodontal pocket or the toothed portion so that the cleansing property of the cervical portion can be further improved.

According to the present embodiment, when the inner and outer shrouds 12 and 22 are arranged in a zigzag shape, the inner and outer shrouds 12 and 22 are arranged in the direction of the axis O It is possible to provide the inner wedge 12 and the outer wedge 12 in high density because the positions of the neighboring wedges can be arranged at a high density on the wing face 5 as compared with the case where the positions of the neighboring wedges are arranged in the same lattice shape in the width direction of the head portion 4. [ 22 are arranged in a lattice shape, a smooth massage feeling with a soft touch feeling on the gum, a sense of entry into the cervical portion of the head portion 4 and a good cleaning property can be obtained even if the maximum length of the entire hair-implanting area is small.

The present invention is not limited to the above-described embodiments. In the above-described embodiment, the inner demodulator has a substantially columnar shape. For example, the inner demodulator may have an elliptic elliptical columnar shape in plan view, or a polygonal columnar shape such as a triangular shape, a square shape, and a pentagon in plan view. In addition, when the shape of the inner gathering portion is set to a shape other than the shape of a substantially cylindrical shape, the shape of the parent gathering portion is a diameter of a circular arc circumscribing the shape when viewed from the plane.

The outer worm bundles may be in the form of an elliptical elliptical column viewed from the plane as in an inner worm bundle, or a polygonal columnar shape such as a triangle, a quadrangle, or a pentagon when viewed from the plane.

In the above-described embodiment, the inside flap hole is cylindrical with a bottom, but the shape of the inside flap hole can be determined according to the shape of the inside foot. For example, when the inside flap hole is viewed from the plane, Or may be a polygonal cylinder having a bottom such as a triangle, a quadrangle, a pentagon, or the like as viewed from a plane. The outer side flap hole may be a tubular shape having an elliptical bottom when viewed from the same plane as the inner side flap hole, or a polygonal tubular shape having a bottom such as a triangular shape, a square shape, and a pentagon when viewed from a plane.

In the embodiment described above, the diameters of all the inner brim holes are substantially the same, but the present invention is not limited thereto. The diameters of all the inner brim holes may be different from each other, May be different in diameter. In the embodiment described above, the diameters of all the outer shed holes are substantially the same, but the present invention is not limited thereto. The diameters of all the outer shed holes may be different from each other, The diameter of the flock holes may be different.

In the above-described embodiment, the inner figure is the ST curve, but the present invention is not limited to this. For example, the inner figure may have a uniform diameter in the longitudinal direction, and the tip may be a hemispherical surface It may be a surface. However, from the viewpoint of making it easier to enter the periodontal pocket or the teeth, it is preferable that a part of the inner appearance of the inner joint is an ST joint or a taper joint, more preferably all inner joints of the inner joint are an ST joint or a taper joint. The outer appearance may have a uniform diameter in the longitudinal direction as in the case of the inner appearance, or may be a surface whose tip is parallel to the hemispherical surface or the wedge-shaped surface. However, from the viewpoint of making the feeling of contact with the gum smooth, it is preferable that the outer appearance of a part of the outer joint is an ST joint or a taper joint, and it is more preferable that all outer joints of the outer joint are an ST joint or a taper joint. Further, only one of the inner appearance or the outer appearance may be constituted by an ST shim or a tapered shim.

In the above-described embodiment, the inner and outer appearances are tapered in a substantially cylindrical shape. However, the inner and outer appearances are elliptical elliptical columnar in plan view and polygonal columns in a triangular, rectangular, . Further, when the inner or outer appearance has a shape other than a substantially cylindrical shape, the diameter of the appearance of the inner or outer appearance is the diameter of a circular arc circumscribing the shape when viewed from the plane.

In the above-described embodiment, although the inner lead foot is longer than the outer lead foot, for example, the inner lead foot may be equal to the outer common foot at the same angle, or the inner lead may be 0 mm. It may be shorter than the moths of the feet. It is also possible to set the inner and outer mass feet to be the concave and convex surfaces in which the shape of the tip of the massaging foot is repeated so as to repeat the convex and concave portions in the axial direction of the handle body.

However, from the viewpoint of satisfactorily cleaning the cervical portion, it is preferable that the inner gathering foot is longer than the outer gathering foot.

In the above-described embodiment, the inner overlapping group is composed of 27 inner overlapping units, but the number of the inner overlapping units constituting the inner overlapping group may be 26 or less, or may be 28 or more.

In the above-described embodiment, the first or second outer gathering group is constituted by 15 outer gathering bundles. For example, the number of outer bundles constituting the first or second outer gathering group may be 14 or less, and 16 Or more.

Further, the number of the outer demodulators constituting the first outer demodulation group and the number of the outer demodulation constituting the second outer demodulation group may be equal to or different from each other.

In the above-described embodiment, the inner and outer corrugations are juxtaposed in the zigzag shape, respectively, in the axial direction of the handle, but the present invention is not limited to this. For example, as in the toothbrush 1A shown in Fig. 3, The bundle 12 and the outer bundle 22 may be arranged in a lattice form.

In the above-described embodiment, the outer moduli are provided outside the inner hair-knee area, but the outer hair-sheath may be formed by interposing the inner hair bundle. For example, a part thereof may be located in the inner hair-knee area.

In the above-described embodiment, the modal diameters of all the inner modulating legs are substantially the same. However, for example, the modular diameter of the inner modulating leg may be different from each other. However, from the viewpoint of properly controlling the waist of the inner joint, it is preferable that the wedge diameter of all the inner joints is substantially equal. Further, in the above-described embodiment, the bump diameters of all the external bumps are substantially the same. However, for example, the bump diameters of the external bumps may be different from each other. However, from the viewpoint that the pressure applied to the gum from the tip of the outer massaging foot is made uniform by each of the outer massaging feet, and the feeling of reaching the entire outer massaging group is made smooth, it is preferable that the masses of all the outer massaging legs are substantially equal.

Example

(Assessment Methods)

The toothbrush of each example was evaluated in terms of "feeling of massage" (touch feeling) and cleaning ability of the cervical portion by the following method. In addition, the cleaning property of the cervical portion was evaluated by "cervical entrance feeling" and "cervical cleaning ability".

<Evaluation of massage realization>

For the realization of massage, ten monitors used each toothbrush, and evaluated the feeling of massage of the gums as an evaluation standard. The average score of the 10 monitors was 2.5 or more, the average score was 2.0 or more and the average score was 2.5 or less. The average was 1.5 or more and less than 2.0, and the average score was less than 1.5.

«Evaluation Criteria»

3 points: I feel the massage feeling of the gum very much.

2 points: I feel a gum massage.

1 point: I can not feel the gum massage feeling much.

0 point: I can not feel the massage feeling of the gum.

<Assessment of cervical entrance feeling>

Ten delegates used toothbrushes for each example and evaluated the entrance feeling into the cervical area as an evaluation standard. The average score of the 10 monitors was 2.5 or more, the average score was 2.0 or more and the average score was 2.5 or less. The average was 1.5 or more and less than 2.0, and the average score was less than 1.5.

«Evaluation Criteria»

3 point: I feel very much the tip touches the gap between tooth and gum.

2 points: I feel the tip touches the gap between the teeth and gums.

1 point: I can not feel the impression that the tip touches the gap between the tooth and the gum.

0 point: I can not feel the tip touches the gap between the teeth and the gums.

<Evaluation of cervical cleaning power>

For the cervical cleaning power, the following model cleaning force test was conducted using the toothbrushes of the respective examples and comparative examples. First, a red paint (Sakura white board marker # 19 red, made by SAKURA COLOR PRODUCTS CORPORATION) was applied as a model fixture to the cervical portion of the right ball-side first molar of an adult maxillary model (500AU, manufactured by Nissin Inc.). The tooth having the model fixture was cleaned by reciprocating ten times at a stroke of 20 mm in the direction connecting the tip of the head and the base of the head while pressing the toothbrush with a load of 200 g at 45 °. After cleaning, the jig removal rate was measured by the following method.

Calculation of jig removal rate

Before the cleaning force test, the model jig occupation area of the cervical portion of the first molar was measured by image analysis, and the model jig occupation area of the same area was measured again after the cleaning force test, and was calculated by the following formula (1). The calculated jig removal rate was classified into the following criteria and the cariogenic cleaning power was evaluated. , &Quot;? &Quot;, &quot;? &Quot;, 30% or more, 50% or less,

Jig removal rate (%) = ((Jig occupancy before cleaning power test - Jig occupation area after cleaning power test) / (Jig occupancy before cleaning power test)) × 100 ... (One)

(Examples 1 to 3 and Comparative Examples 1 to 6)

According to the specification shown in Fig. 4, a toothbrush having the ST model (made of PBT) similar to the toothbrush 1 shown in Fig. 1 was produced. The toothbrush (1) comprises a pair of inner and outer masses formed of an inner masses woven in a staggered shape, and a pair of outer masses each formed of an outer masses woven in a zigzag shape with an inner mass of masses interposed therebetween. The first and second outside groups are each composed of the same number of outside groups.

In the table, the "number of inner figures per inner wedge" is the number of inner wedges constituting one inner wedge, and the number of "outer wedges per outer wedge" is the number of outer appearances constituting one outer wedge . The specifications for the outer-most prevalence group are described as the sum of the first outer-most prevalence group and the second outer-most prevalence group. Each of the obtained toothbrushes was evaluated for massage feeling, cervical entrance feeling, and cervical cleaning ability.

(Examples 4 to 6)

According to the specification shown in Fig. 4, similarly to the toothbrush 1A shown in Fig. 3, a toothbrush having the ST model (manufactured by PBT) was manufactured. The toothbrush (1A) includes a pair of inner and outer masses formed of an inner massaging legs woven in a lattice shape, and a pair of outer massaging legs each having an outer massaging legs interposed between the inner and outer masses. The first and second outside groups are each composed of the same number of outside groups. Each of the obtained toothbrushes was evaluated for massage feeling, cervical entrance feeling, and cervical cleaning ability.

As shown in Fig. 4, in Examples 1 to 6 in which the present invention was applied, evaluation of massage feeling, cervical entrance feeling, and cervical cleaning power was "⊚" or "◯".

On the other hand, in Comparative Example 1 in which the outer diameter of the outline foot was 2.0 mm and the maximum length of the outer forehead area was 9.9 mm, the cervical entrance feeling and the cervical cleaning power were &quot; .

In the comparative example 2 in which the outer diameter of the outer part of the foot was 1.1 mm and the maximum length of the outer hair part was 6.3 mm, the cervical entrance feeling was &quot;? &Quot;, and the cervical cleaning power was &quot;? &Quot;

In Comparative Example 3, in which the modal diameter of the medial allodynia was 1.5 mm and the maximum length of the medial folding area was 5.6 mm, the feeling of massage was "○", but the cervical entrance feeling and cervical cleaning power were "Δ".

In the comparative example 4 in which the inner diameter of the medods was 0.9 mm and the maximum length of the inner callus area was 3.8 mm, the massage feeling and cervical entrance feeling were &quot;? &Quot;, but the cervical cleaning power was &quot; x &quot;.

In Comparative Example 5 in which the filling density ratio was 3.03, the feeling of massage was "⊚", but the cervical entrance feeling and the cervical cleaning power were "x".

In Comparative Example 5 in which the filling density ratio was 1.25, both the massage feeling, cervical entrance feeling, and cervical cleaning power were "?".

From this result, it can be seen that a toothbrush satisfying any of massage feeling, cervical entrance feeling, and cervical cleaning ability accompanied by a feeling of soft touch to the gum can be obtained by applying the present invention.

 While the preferred embodiments of the present invention have been described with reference to the accompanying drawings, it is needless to say that the present invention is not limited to these examples. Various shapes, combinations, and the like of each component member shown in the above-described example are merely examples, and various modifications can be made in accordance with design requirements and the like without departing from the gist of the present invention.

(Industrial applicability)

The present invention is applicable to toothbrushes.

1, 1A: toothbrush 2: handle body
4: head part 5:
11: medial palmar region 12: medial lamella
21: outer hair follicle area 22: outer hair follicle
O: Axis

Claims (5)

1. A toothbrush comprising: a handle body provided with a head portion at a tip end thereof; and a plurality of knockout holes formed in a wicking surface of the head portion,
The inner peripheral surface of the handle body is provided with an inner peripheral portion formed by arranging a plurality of inner peripheral portions at substantially the center in the width direction orthogonal to the axial direction,
And an outer bristle region in which a plurality of outer bristles are formed by sandwiching the inner bristle in the width direction,
The maximum length of the entire hair-implanting area in which the plurality of inner patterns and the plurality of outer modulations are formed in the width direction is 12.0 mm or more and 16.0 mm or less,
The maximum length of the outer flocking area in the width direction is 6.5 mm or more and 9.5 mm or less,
Wherein the maximum length of the inner flocking area in the width direction is 4.0 mm or more and 5.5 mm or less,
The outer diameter of the outer aggregate is 1.4 mm or more and 1.8 mm or less,
Wherein the inner diameter of the inner gathering portion is 1.0 mm or more and 1.4 mm or less. The method according to claim 1,
Wherein a value obtained by dividing the total number of appearances constituting the plurality of outer mold bundles by the area of the outer mold region is an outer mold density and a total number of the features constituting the plurality of inner mold bundles is defined as an area , And the value obtained by dividing
Wherein the ratio of the filling density expressed by the outer bristle density / inner bristle density is not less than 1.4 and not more than 2.5. 3. The method according to claim 1 or 2,
Wherein the inner mold bundle has a length on the flocking surface that is greater than a length on the flocking surface of the outer molding. 4. The method according to any one of claims 1 to 3,
Wherein the at least one of the inner bundle and the outer bundle includes features that gradually decrease in diameter toward the anterior end. 5. The method according to any one of claims 1 to 4,
Wherein the inner and outer bobbins are arranged in a zigzag shape in which the positions of the mutually adjacent mutually adjacent bobbins in the axial direction are shifted in the width direction,
The maximum length of the entire facings in the width direction is 12.0 mm or more and 15.0 mm or less,
Wherein a maximum length of the outer flocking area in the width direction is 7.0 mm or more and 9.5 mm or less,
Wherein a value obtained by dividing the total number of appearances constituting the plurality of outer mold bundles by the area of the outer mold region is an outer mold density and a total number of the features constituting the plurality of inner mold bundles is defined as an area , And the value obtained by dividing
Wherein the ratio of the filling density expressed by the outer bristle density / inner bristle density is not less than 1.4 and not more than 2.0.

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