JP6239795B2 - toothbrush - Google Patents

Description

The present invention relates to a toothbrush.

  To prevent caries, cleaning between teeth is essential. Moreover, in order to prevent periodontal disease, it is necessary to clean the periodontal pocket around the tooth.

  Patent Document 1 discloses a toothbrush comprising a flocked portion in which a plurality of bundles of hair bundles are embedded, a gripping portion, and a neck portion that connects the flocked portion and the gripping portion, on the outside of the flocked portion. A step comprising: an outer hair bundle embedded in a substantially U shape so as to be positioned; and an inner hair bundle embedded so as to be positioned inside the outer hair bundle, wherein the inner hair bundle is shorter than the outer hair bundle. A toothbrush is disclosed, in which a tip portion of each hair bundle in the inner hair bundle forms an inclined portion from one end side to the other end side of the outer hair bundle. .

JP2015-91283A

An object of this invention is to provide the toothbrush which can hold | grip a toothbrush firmly with a weak force and can adjust the angle of the head required for brushing.

In order to solve the above problems, the present invention includes, for example, a head part and a grip part connected to the head part,
The gripping part is a ring-shaped first finger-hanging part provided with a through-hole for passing a finger;
A second finger-hanging portion formed to extend to the first finger-hanging portion and having a maximum width wider than the maximum width of the outer edge of the first finger-hanging portion;
A toothbrush including a grip portion extending from the second finger-hanging portion .
The front SL head portion, at a gap across the longitudinal direction of the one side to the other side, the hair bundle group may be more disposed comprising a plurality of bristle tufts.
The hair bundle group is
In the short direction of the head portion, the number of hair bundles is large near the center, and the number of hair bundles is reduced on both sides thereof.
The gap between the hair bundle groups may be 1 to 3.5 mm.

  ADVANTAGE OF THE INVENTION According to this invention, the toothbrush which can brush appropriately can be provided according to the shape of a tooth | gear.

It is a figure which shows the external appearance of the toothbrush in 1st Embodiment. It is a figure which shows the external appearance of the toothbrush in the 1st modification of 1st Embodiment. It is a figure which shows the external appearance of the toothbrush in a 2nd modification. It is a figure for demonstrating the detail of the head part of the toothbrush in a 3rd modification. It is a figure which shows an example of the use condition of the toothbrush in a 3rd modification. It is a figure which shows the external appearance of the head part in a 4th modification and a 5th modification. It is a figure which shows the external appearance of the toothbrush in a 6th modification and a 7th modification. It is a figure which shows the external appearance of the toothbrush in 2nd Embodiment. It is a figure which shows the external appearance of the toothbrush in 3rd Embodiment. It is a front view of the head part of the toothbrush in 4th Embodiment.

(First embodiment)
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram illustrating an appearance of a toothbrush 1 according to the first embodiment.

  FIG. 1A is a plan view of the toothbrush 1. FIG. 1B is a front view of the toothbrush 1. FIG. 1C is a left side view of the toothbrush 1. FIG.1 (d) is an enlarged view of the head part 11 of the toothbrush 1 seen from the y direction shown in FIG.1 (b). The toothbrush 1 includes a head portion 11, a grip portion 15 connected to the head portion 11, a hair bundle 12 composed of a plurality of brush hairs implanted in the head portion 11, and a plurality of hair bundles composed of a plurality of hair bundles 12. And group 13. The toothbrush 1 shown in FIG. 1 has three bristle bundle groups 13. In addition, the hair bundle group 13 is configured by hair bundles 12 that are implanted so as to fit in a substantially rectangular region on the head portion 11.

  The plurality of hair bundle groups 13 are adjacent to each other with a gap 14 therebetween. The head part 11 has one or a plurality of gaps 14, and the gaps 14 extend in the short direction of the head part 11. More specifically, the gap 14 is configured to connect one point on the long side of the periphery of the head unit 11 and one point on the other long side opposite to the long side. The gap 14 has, for example, a linear shape that is substantially orthogonal to the direction in which the grip portion 15 extends. The gap 14 is a gap in the root portion of the hair bundle 12. When the head portion 11 does not have a long side and a short side, such as when the head portion 11 is substantially circular or square when viewed from the y direction in FIG. 1B, the gap 14 is formed on the periphery of the head portion 11. It is configured to connect one point and another point on the periphery.

  In addition, although the toothbrush 1 in this embodiment has the several hair | bristle bundle group 13, Preferably it has the 3 or more hair | bristle bundle group 13. FIG. In a general toothbrush, the gripping part 15 and the head part 11 are integrally formed of resin or the like. Moreover, the long side of the head part 11 of a general toothbrush is about 2.3 cm. When three or more hair bundle groups 13 are provided for the head portion, when each hair bundle group 13 is configured to have substantially the same size, the hair bundle groups 13 adjacent from the center of one hair bundle group 13. The distance in the longitudinal direction of the head to the center of the head becomes 7 mm or less, which is an appropriate distance with respect to an adult's teeth. That is, even when molding using a general toothbrush mold, the hair bundle group can be appropriately reached between the teeth at a plurality of locations. It is preferable to have.

  The gap 14 is wider than the interval between the hair bundle 12 and another adjacent hair bundle 12 belonging to the same hair bundle group 13 as the hair bundle 12. That is, the gap 14 is wider than the interval between the plurality of hair bundles 12 constituting the hair bundle group 13. The gap 14 is desirably 1 mm or more and 3.5 mm or less.

(First modification)
FIG. 2 is a diagram illustrating an appearance of the toothbrush 1 according to the first modification of the first embodiment. Hereinafter, differences from the above-described embodiment will be described, and description of overlapping points will be omitted.

  Fig.2 (a) is a top view of the head part 11 of the toothbrush 1 in a 1st modification. Each hair bundle group 13 in the above-described embodiment is composed of a plurality of hair bundles 12 planted so as to fit in a substantially rectangular area with respect to the head portion 11. The hair bundle group 13 in the first modified example has the hair bundles 12 planted at locations other than the planted locations at the four corners among the planted locations of the hair bundle 12 constituting the substantially rectangular shape in the above-described embodiment. As a result, the hair bundle group 13 is composed of the hair bundles 12 that are implanted so as to fit in a substantially elliptical region on the head portion 11.

  FIG.2 (b) is a top view of the other example of the head part 11 of the toothbrush 1 in a 1st modification. The head portion 11 in FIG. 2B is not planted at a place other than the flocked places at the four corners of the substantially rectangular hair bundle 12, like the head portion 11 in FIG. However, the head portion 11 in FIG. 2B is different from the head portion 11 in FIG. 2A in that the hair bundle group 13 has a hair bundle 12 planted in a substantially elliptical region on the head portion 11. It is the same. Note that the circle is treated as being included in an approximately oval shape.

  FIG.2 (c) is a perspective view of the head part 11 of the toothbrush 1 in a 2nd modification. The bristle bundle 12 of the toothbrush 1 in the second modified example is composed of brush bristles that are aligned to the same length. The tip of the brush hair has a planar shape substantially parallel to the flocked surface of the head portion 11. Note that the tip of the brush hair may have a substantially hemispherical shape, or may have a sharp shape such that the diameter gradually decreases toward the tip.

(Second modification)
FIG. 3 is a diagram showing an appearance of the toothbrush 1 in the second modification. Fig.3 (a) is a top view of the toothbrush 1 in a 2nd modification. FIG.3 (b) is a front view of the toothbrush 1 in a 2nd modification. The toothbrush 1 in the third modification has two bristle bundle groups 13. Further, the hair bundle group 13 in the second modified example is constituted by the hair bundle 12 planted so as to fit in a substantially circular region on the head portion 11.

(Third Modification)
FIG. 4 is a diagram for explaining details of the head portion 11 of the toothbrush 1 in the third modification. The hair bundle 12 in the third modified example has brush hairs having different lengths. FIG. 4A is a perspective view of the head unit 11 in the third modification. FIG.4 (b) is a figure for demonstrating the bristle in a 3rd modification. FIG. 4C is a diagram for explaining another configuration example in the third modification. The bristle bundle 12 of the toothbrush 1 in the third modified example includes a first brush bristle 121 and a second brush bristle 122 longer than the first brush bristle.

  Note that the different lengths means that the lengths are substantially different. For example, it means that the lengths can be recognized visually. The difference in length between the first brush hair 121 and the second brush hair is 1 mm to 5 mm, more preferably 3 mm to 4 mm.

  The 1st brush bristle 121 has the front-end | tip of the planar shape substantially parallel with respect to the flock surface of the head part 11 similarly to the bristle which the toothbrush 1 in the above-mentioned 2nd modification has. The second brush bristles 122 have a pointed shape in which the diameter gradually decreases toward the tip.

  Note that the tip of the first brush hair 121 may have a substantially hemispherical shape, or may have a shape in which the diameter gradually decreases toward the tip. However, the tip of the second bristles 122 is configured to have a sharper shape than the tip of the first brush bristles 121. In other words, the distance from the point where the diameter starts to decrease in the second brush hair 122 to the tip is longer than the distance in the first brush hair 121.

  Moreover, the bristle bundle 12 of the toothbrush 1 in the third modification may have brush hairs having different shapes or lengths from the first brush hairs 121 and the second brush hairs 122.

  As can be seen from FIG. 4A, the plurality of hair bundles 12 of the toothbrush 1 in the third modification may all have first brush hairs 121 and second brush hairs 122. Further, as can be seen from FIG. 4C, the toothbrush 1 includes the hair bundle 12 including only the first brush hair 121 or the second brush hair 122, the first brush hair 121, and the second brush hair 122. The hair bundle 12 may have at least two kinds of hair bundles 12.

  FIG. 5 is a diagram illustrating an example of a usage state of the toothbrush 1 in the third modification. FIG. 5A shows a state where the toothbrush 1 is simultaneously brushing the three teeth. By applying the hair bundle group 13 between the teeth, it is possible to polish the spaces between the teeth at the same time. Further, the presence of the gap 14 can prevent the brush bristle from hitting the central portion of the tooth and reduce the consumption of the toothbrush 1.

  FIG. 5B is a diagram illustrating a state in which the hair bundle group 13 provided at the tip of the head portion 11 is polishing the periodontal pocket t.

  The back teeth are divided into two forks at the root portion embedded in the gums, but the crotch portion may be exposed to form a periodontal pocket. Here, the periodontal pocket t is a periodontal pocket near the root corresponding to the crotch portion of the back teeth.

  In the present embodiment, the hair bundle group 13 provided at the tip of the head portion 11, and another hair bundle group 13 provided adjacent to the hair bundle group 13 and closer to the grip portion 15 than the hair bundle group 13, There is a gap 14 between them. Therefore, when the periodontal pocket is polished by the hair bundle group 13 at the tip, it is possible to prevent the other hair bundle group 13 from hitting the tooth surface and efficiently polish the desired periodontal pocket. In addition, it cannot be overemphasized that the toothbrush 1 can also polish the periodontal pocket in the clearance gap between a tooth | gear and a gum efficiently. Thus, the toothbrush 1 is easy to polish aiming at the point aimed at the periodontal.

(Fourth modification)
FIG. 6 is a diagram illustrating an appearance of the head unit 11 in the fourth modification and the fifth modification. FIG. 6A is a left side view of the head unit 11 in the fourth modified example, and FIG. 6B is a left side view of the head unit 11 in the fifth modified example.

  The head portion 11 in the fourth modification is a tooth formed by the tip of the hair bundle 12 when the tip of the head portion 11 of the toothbrush 1 is viewed from the front (when viewed from the -x direction in FIG. 1B). Is curved in a convex direction with respect to the flocked surface of the head portion 11. That is, when the short direction of the head portion 11 is viewed from the front, the curve connecting the tips of the hair bundles 12 has an arc shape that curves in a direction protruding with respect to the flocked surface of the head portion 11. The bristle bristles of the bristles 12 near the center of the head part 11 are the longest, and the bristle is gradually shortened toward the edge of the head part 11.

  In addition, also in the toothbrush 1 in a 4th modification, and the toothbrush 1 in the following 5th modification, it has the several bristle bundle group 13 which adjoins across the clearance gap 14 similarly to the above-mentioned embodiment. Needless to say.

  Thereby, a bristle can be made to reach a desired location more easily. Moreover, since the tip of the brush hair can be fitted into the depression on the occlusal surface of the tooth, the occlusal surface that tends to become a decayed tooth can be more efficiently polished.

  In addition, the toothbrush 1 in a 4th modification may have at least 2 types of hair | bristle bundle 12 of the 1st hair | bristle bundle and the 2nd hair | bristle bundle whose full length is longer than a 1st hair | bristle bundle. .

  Here, the full length of the bristle bundle 12 refers to the distance from the tip of the longest bristle of the bristle constituting the bristle bundle 12 to the root part of the bristle. It can be recognized that the second hair bundle in this modification has a longer overall length than the first hair bundle. The difference in total length between the first hair bundle and the second hair bundle is 2 mm to 9 mm, more preferably 3 mm to 5 mm.

  In this case, when the toothbrush 1 in the fourth modification is viewed from the front in the short direction of the head portion of the toothbrush 1, the contact surface with the teeth formed by the tip of the second hair bundle is the flocking of the head portion 11. Curves in a convex direction with respect to the surface.

  Hereinafter, also in the fifth embodiment, the sixth embodiment, and the seventh embodiment, the toothbrush 1 includes the first bristle bundle and the second bristle whose overall length is longer than the first bristle bundle. The fourth modification is common in that at least two types of hair bundles 12 may be included. In this case, the contact surface with the teeth formed by the hair bundle group 13 is constituted by the tip of the second hair bundle.

(Fifth modification)
The head portion 11 in the fifth modification is a tooth formed by the tip of the hair bundle 12 when the tip of the head portion 11 of the toothbrush 1 is viewed from the front (when viewed from the -x direction in FIG. 1B). Is curved in a concave direction with respect to the flocked surface of the head portion 11. That is, when the front end of the head portion 11 is viewed from the front, the curve connecting the front ends of the hair bundles 12 has an arc shape that is curved in the direction of depression with respect to the flocked surface of the head portion. The bristles of the bristles 12 near the center of the head portion 11 are the shortest, and the bristles are configured to gradually become longer toward the edge of the head portion.

  Thereby, when a tooth is regarded as a rectangular parallelepiped, brush hair can be fitted to a corner portion, and plaque at the corner portion can be more efficiently removed. In addition, it is possible to appropriately polish the protruding portion of the teeth such as the front teeth and the tips of the canines.

(Sixth Modification)
FIG. 7 is a diagram illustrating an appearance of the toothbrush 1 in the sixth modification and the seventh modification. Fig.7 (a) is a top view of the toothbrush 1 in a 6th modification. FIG.7 (b) is a front view of the toothbrush 1 in the 6th modification. In addition, although the head part 11 of the toothbrush 1 in this figure has the four bristle bundle groups 13, the number of the bristle bundle groups 13 of the toothbrush 1 in the sixth modified example and the seventh modified example is as follows. It is not limited to.

  In the toothbrush 1 in the sixth modification, when the toothbrush 1 is viewed from the front, the tip of the hair bundle group 13 included in the head portion 11 has a contact surface with the teeth that is in contact with the flocked surface of the head portion 11. Curved in the concave direction. In other words, as shown in FIG. 7B, when the longitudinal direction of the head portion 11 is the front, the curve connecting the tips of the hair bundle groups 13 of the head portion 11 has an arc shape with a depressed center. doing. The curve is configured to increase in height from the center of the head portion 11 toward both ends of the head portion 11. That is, the length of the central hair bundle 12 of the head portion 11 is the shortest, and the length of the hair bundle 12 is gradually increased toward both ends of the head portion 11.

  Thereby, when brushing the dentition curved so as to draw an arc toward the outside of the oral cavity from the outside, the hair bundle 12 can be fitted to the dentition and the teeth can be efficiently brushed.

(Seventh Modification)
FIG.7 (c) is a top view of the toothbrush 1 in the 7th modification. FIG.7 (d) is a front view of the toothbrush 1 in the 7th modification. When the toothbrush 1 in the seventh modification is viewed from the front, the tooth contact surface formed by the tip of the bristle bundle group 13 of the head unit 11 is in contact with the flocked surface of the head unit 11. Curved in the convex direction.

  In other words, when the longitudinal direction of the head part 11 is the front, the curve connecting the tips of the hair bundle groups 13 of the head part 11 has an arc shape with the center protruding from the center of the head part 11. The height of the head portion 11 is configured to decrease toward the both ends. That is, the length of the hair bundle 12 at the center of the head portion 11 is the longest, and the length of the hair bundle 12 gradually decreases toward both ends of the head portion 11.

  Thereby, when brushing the back side of a tooth, the hair | bristle bundle 12 can be fitted to the inner side of a dentition, and a tooth can be brushed efficiently.

  In addition, it cannot be overemphasized that the above-mentioned embodiment and each modification of the toothbrush 1 can be suitably combined in the range without a contradiction. For example, the fourth modification and the sixth modification are combined, and the contact surface with the tooth formed by the tip of the brush bristles protrudes with respect to the flocked surface when the front end side of the head portion 11 is front. It is good also as a structure curved to the direction which sinks with respect to the flocked surface when the longitudinal direction of the head part 11 is made into the front. Moreover, the direction which the contact surface with the tooth | gear which the front-end | tip of a bristle makes | forms combines the 4th modification and the 7th modification, and makes the front-end | tip side of the head part 11 into the front protrudes. It is good also as a structure curved in the direction which protrudes with respect to a flocked surface, when it curves to the front and the longitudinal direction of the head part 11 is made into the front. The same applies to the combination of the fifth modification and the sixth modification, or the combination of the fifth modification and the seventh modification.

(Second Embodiment)
Next, a second embodiment will be described. FIG. 8 is a diagram illustrating an appearance of the toothbrush 1 according to the second embodiment. FIG. 8A is a front view of the toothbrush 1 in the second embodiment. FIG.8 (b) is a top view of the toothbrush 1 in 2nd Embodiment. FIG.8 (c) is a figure which shows an example of the use condition of the toothbrush 1 in 2nd Embodiment.

  The grip 15 in the present embodiment includes a ring-shaped first finger hook 151 provided with a through-hole for passing a finger, a second finger hook 152 formed to extend to the first finger hook 151, And a grip portion 153 formed to extend to the second finger rest portion 152. The grip portion 15 is formed in a flat shape in which the width of the front surface that is the same surface as the surface on which the flocking is performed in the head portion 11 and the back surface that is the opposite surface is wider than both side surfaces between the front surface and the back surface. Is done.

  The first finger hanging portion 151 is formed to extend to the head portion 11. The through hole 154 of the first finger hook portion 151 shown in FIG. 1A is formed in a substantially circular shape. The first finger hanging portion 151 is formed with a size that allows not only the fingertips such as the index finger and the thumb but also the base of the finger to enter. Appropriate values are different for infants, children, and adults, and the first finger hanging portion 151 preferably has a maximum inner diameter width Dn of about 13 mm to 35 mm and an outer edge maximum width Dg of about 20 to 40 mm. Thereby, the freedom degree of the whole hand holding the toothbrush 1 can be raised.

  The second finger hanging portion 152 is formed to extend to the first finger hanging portion 151. The second finger hanging portion 152 includes a pair of concave portions 152a and a pair of convex portions 152b. The pair of recesses 152a are a pair of recesses that are formed to extend from the outer edges of the first finger hooks 151 and face each other. The pair of convex portions 152b are convex portions that extend from the pair of concave portions 152a and face each other.

  As an example, as shown in FIG. 8 (b), the second finger hanging portion 152 is formed in a shape that is further narrowed and then further narrowed from the outer edge of the first finger hanging portion 151. As a result, a pair of concavities 152a that are constricted depressions and a pair of convex portions 152b that are “heavy” are formed on both side surfaces. The second finger hanging portion 152 is formed such that the maximum width W formed between both convex portions 152 b is wider than the maximum width of the outer edge of the first finger hanging portion 151. Preferably, the maximum width W of the second finger hanging portion 152 is about 30 mm to 60 mm, and is wider than the outer edge of the first finger hanging portion 151.

  The grip portion 153 is formed to extend to the second finger hanging portion 152. The grip portion 153 is formed to have a rounded end portion.

  As an example, the toothbrush 1 is formed symmetrically with respect to the center line L in the longitudinal direction. Alternatively, the toothbrush 1 may be formed so that the concave portion 152a on the side where the thumb is applied is deeper than the concave portion 152a on the side where the middle finger is applied when the index finger is passed through the first finger hanging portion 151 according to the dominant hand. Good.

  In FIG. 1, the convex portion 152 b is formed in a “he” shape, but is not limited to this, and for example, is formed so as to protrude from both side surfaces in a “冂” shape. Also good.

  As shown in FIG. 8C, the user can hold the toothbrush 1 such that the index finger is passed through the first finger rest 151 and the thumb and middle finger are respectively brought into contact with the second finger rest 152. Further, the toothbrush 1 can be grasped so that the thumb is passed through the first finger-hanging portion 151 and the index finger and the middle finger are respectively put on the second finger-hanging portion 152. Thus, the user can firmly hold the toothbrush 1 even with a weak force, and can adjust the angle of the head portion 11 required for brushing.

  That is, the user can firmly hold the toothbrush 1 even with a weak force by passing a finger through the first finger rest 151 and placing the finger against the second finger rest 152. In addition, since the maximum width of the second finger hanging portion 152 is wider than that of the first finger hanging portion 151, it becomes a natural gripping mode, and since it is supported at three points, a stable grip can be achieved. Further, by including the concave portion 152a and the convex portion 152b in the second finger hanging portion 152, the toothbrush 1 is rotated in the long axis direction so that the toothbrush 1 is twisted by the convex portion 152b with the finger placed on the concave portion 152a. Thus, the angle of the head portion 11 can be adjusted. Further, since the width between the convex portions 152b (the maximum width of the second finger-hanging portion) is wide, the effect of changing the angle of the head portion 11 can be sufficiently obtained even with a small twist.

(Third embodiment)
Next, a third embodiment will be described. FIG. 9 is a diagram showing an appearance of the toothbrush 1 in the third embodiment. The toothbrush 1 in the third embodiment has a connecting portion 18. The head portion 11 and the grip portion 15 are connected by the connection portion 18. For example, one of the one end of the head part 11 and the one end of the grip part 15 has a convex shape, the other has a concave shape, and one of the one fits the other, thereby connecting the connection part. At 18, the head unit 11 and the gripping unit 15 are connected. Note that the connection method is not limited to this, and any method may be used as long as the head unit 11 is replaceably connected to the grip unit 15.

  The toothbrush 1 in 3rd Embodiment is a head part provided with the hair bundle group 13 planted in various shapes besides the head part 11 which has the several hair bundle group 13 shown in the above-mentioned embodiment and modification. 11 may be connectable. For example, like the conventional toothbrush, the head unit 11 composed of one bristle bundle group 13 that forms a row along the longitudinal direction of the head unit 11 may be connectable.

  Thus, for example, the head portion 11 having no gap 14 is used in a portion other than the space between the teeth, and the head portion 11 having the gap 14 is used when polishing the space between the teeth. Can do. Further, when the head portion 11 is consumed, only the head portion 11 can be replaced, and the gripping portion 15 that has been used can be used continuously. Furthermore, the hardness and color of the toothbrush may be changed for each group of hair bundles, or may be changed depending on the circumference and center of each group of hair bundles. As a result, it is possible to obtain a change in the sensation and effect of the brush when brushing.

(Fourth embodiment)
Next, a fourth embodiment will be described. FIG. 10 is a front view of the head portion of the toothbrush according to the fourth embodiment. The head portion 11 of the toothbrush 1 according to the fourth embodiment includes a first hair bundle group 12b and a plurality of second hair bundle groups 12a having a total length longer than that of the first hair bundle group. The first hair bundle group 12b and the second hair bundle group 12a correspond to the hair bundle 12 in the above-described embodiment.

  The first hair bundle group 12 b is arranged from one side in the longitudinal direction of the head portion 11 to the other side. The plurality of second hair bundle groups 12a are arranged so as to be spaced apart from the first hair bundle group 12b. Since the first hair bundle group 12b has a shorter overall length than the second hair bundle group 12a, a gap 14 is formed at least at the tip portion between the plurality of second hair bundle groups 12b.

  According to this embodiment, a plurality of types of hair bundle groups having different overall lengths are formed. Further, since the short hair bundle group is formed between the long hair bundle groups, it is possible to prevent the toothbrush 1 from being damaged due to the long hair bundle group becoming constant. Moreover, since the short hair | bristle bundle group contacts the tooth | gear surface when the long hair | bristle bundle group is brushing between teeth, the interdental and tooth | gear surface can be polished efficiently.

  As mentioned above, although this invention has been demonstrated based on each embodiment, this invention is not limited to the requirements shown in the said embodiment. The requirements shown in the above embodiment can be changed without departing from the spirit of the present invention, and can be appropriately determined according to the application form.

  Moreover, each embodiment can combine each characteristic. Any of the above-described toothbrushes 1 may have the characteristics of other embodiments.

  1: Toothbrush, 11: Head part, 12: Hair bundle, 13: Hair bundle group, 14: Gap, 15: Grasping part, 121: First brush hair, 122: Second brush hair, 151: First finger hook Part, 152: second finger hook part, 152a: concave part, 152b: convex part, 153: grip part, 154: through hole, t: periodontal pocket

Claims (3)

A head part, and a gripping part connected to the head part,
The gripping part is
A ring-shaped first finger rest provided with a through hole for passing a finger;
A second finger-hanging portion formed to extend to the first finger-hanging portion and having a maximum width wider than the maximum width of the outer edge of the first finger-hanging portion;
A toothbrush comprising a grip portion extending from the second finger-hanging portion. The toothbrush according to claim 1,
A toothbrush in which a plurality of bristle bundle groups including a plurality of bristle bundles are arranged on the head portion with a gap extending from one side in the longitudinal direction to the other side. The toothbrush according to claim 2 ,
The hair bundle group is
In the short direction of the head portion, the number of hair bundles is large near the center, and the number of hair bundles is reduced on both sides thereof.
A toothbrush in which a gap between the hair bundle groups is 1 to 3.5 mm.

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