JP3185736U - toothbrush - Google Patents

Abstract

An epoch-making toothbrush capable of brushing teeth much more efficiently than a conventional toothbrush is provided.
An elongate grip portion and a toothbrush base portion connected linearly to a distal end portion of the elongate grip portion are provided. A columnar shape including a toothbrush base portion 14 having a narrow central brush bristle planting portion 16A and a pair of left and right inclined side brush bristle planting portions 18A which are provided on both sides of the central brush bristle planting portion 16A and are inclined outward. To form. In the central brush bristle planting portion 16A, the central brush bristle row 20 is implanted so that the short and long linear brush bristles 22 and 24 are alternately positioned in the longitudinal direction and become uneven, and a pair of left and right slopes The side brush bristle planting portion 18A is planted in two rows so that the side inner brush bristle rows 26 are alternately located on the inner side and the outer side brush bristle rows 28 are alternately located on the outer side. The side inner brush bristles 26 use short inner arc bristles 26a, and the side outer brush bristles 28 use outer arc bristles 28a longer than the inner arc bristles.
[Selection] Figure 3

Description

  The present invention can polish the occlusal surface, buccal tongue surface and neck of the tooth at the same time by brushing the bristles on the teeth with the bristles facing the teeth, and advanced brushing such as scrubbing and bathing. The present invention relates to a toothbrush that can be easily performed.

  Conventionally, various methods are known as a toothbrushing method (brushing method), and in particular, a bath method and a scrubbing method are recommended as advanced brushing methods.

  In the bath method, the toothbrush is first placed about 45 degrees from the occlusal surface direction with respect to the tooth axis, the tip of the toothbrush is placed on the neck, and a slight pressure is applied as if it slides along the tooth surface. Then, the bristles are naturally guided into the gingival sulcus, and then a small back-and-forth vibration is applied to the head of the toothbrush in the near-distal direction for a few seconds without moving the position of the bristles. The centrifugal surface is a method in which the tip of the brush portion of the toothbrush is inserted vertically and the same operation is repeated.

  The scrubbing method is a highly cleaning method that takes into account the difficulty of brushing operation itself and the harmful effects of brushing (tooth wear and gingival retraction). The entire toothbrush is vibrated in the manner of rubbing the tooth surface of several mm. On the cheek surface, the tip of the toothbrush crosses the buccal cusp on the one hand, the other is near the gingival margin, and on the adjacent tooth surface, the tip of the toothbrush The same is applied to the front of the tongue, but the angle between the toothbrush and the tooth surface is shallower than when the buccal surface is brushed, This is a method of performing micro-vibration in the back-and-forth state.

  Since it is difficult for a normal person to perform these advanced tooth brushing methods with a normal toothbrush, it is difficult to carry out these tooth brushing methods at present.

  On the other hand, a toothbrush that aims to polish the buccal and lingual sides of a tooth simultaneously by one operation has already been proposed (Patent Document 1), but in this toothbrush, a brush row is simply bent or bent inward. Therefore, it has been impossible to reliably and easily implement the above-described advanced brushing method.

  Therefore, the present inventor has further proposed the above-described conventional toothbrush, and has already made studies and proposed a toothbrush that can perform brushing methods such as a scrubbing method and a bath method reliably and easily ( Patent Document 2).

  The above-described toothbrush proposed by the present inventor comprises a long grip portion and a brush portion linearly connected to the long grip portion, and has a short length at the center in the longitudinal direction of the brush portion. An occlusal surface cleaning brush row is implanted, a pair of buccal tongue surface cleaning brush rows is implanted outside the short dentifrice brush row, and the central portion of the buccal tongue surface cleaning brush is 100 to 160 degrees. And a pair of tooth neck cleaning brush rows are implanted further outside the buccal tongue surface cleaning brush row and the tooth neck portion. A central portion of the cleaning brush is bent inward at an angle of 100 to 160 degrees so that the tip surfaces of the brush portions face each other, and a concave portion having a substantially V-shaped cross section in the longitudinal direction of the upper surface of the brush portion If the surface is formed and each brush row is constructed on the upper surface of the recessed brush portion, the elasticity of each brush row is obtained. There increase the cleaning effect of the brush went also to proposals for further enhanced point.

  According to the above-mentioned conventional proposal of the present inventor, (1) the occlusal surface, the buccal side and the lingual side of the tooth surface can be brushed at once, and (2) the toothbrushing can be performed in at least half the time of the prior art. (3) Two kinds of effective and advanced brushing methods, scrubbing method and bath method, can be easily performed. (4) Since the outer brush row is bent, a tooth correction device and a bridge ( This has the practical effect of facilitating cleaning of the bridge denture.

  However, the above-mentioned toothbrush proposed by the inventor of the present invention has insufficient points from the standpoint of easily and sufficiently polishing the portion that is still desired to be polished, and cleaning of tooth grooves, side surfaces, and periodontal pockets that are difficult to clean. It is not possible to simultaneously clean the teeth and adjacent surfaces of the teeth, the cervical and marginal gingiva, and to stimulate the massage, and to easily remove plaque and food residues that cause periodontal disease. However, it was not enough from the viewpoint of whether or not it was possible.

JP-A-57-52408 JP-A 64-51431

  As a result of further diligent research on the improvement of the toothbrush according to the above proposal, the present inventor has completed an epoch-making toothbrush capable of brushing teeth much more efficiently than a conventional toothbrush. The present invention aims to provide this new toothbrush.

  In order to solve the above-mentioned problems, a toothbrush of the present invention comprises a long grip portion, and a plurality of elastic brush materials made of plastic material that are linearly connected to the distal end portion of the long grip portion. A toothbrush base part for implanting the toothbrush base part, the toothbrush base part being provided on both sides of the narrow central brush bristle planting part and the central brush bristle planting part and inclined to the outside It is formed in a columnar shape including an inclined side brush bristle planting portion, and the central brush bristle planting portion is arranged so that short and long straight brush hairs are alternately positioned in the longitudinal direction and become uneven. Brush bristle rows are planted, and the pair of right and left inclined side brush bristle portions are planted in two rows so that the inner side brush bristle row on the inner side and the outer side brush bristle row on the outer side are alternately positioned. The side inner brush bristles use short inner arc bristles, A pair of inner arcuate brush hairs are curved so as to form a resilient arch shape, and each tip is in contact with or intersects with each other. Using the outer arc brush bristles that are longer than the arc brush bristles, the pair of left and right outer arc bristles are curved so as to have a resilient arch shape, and the respective tip portions are in contact with or intersect with each other It is formed by being planted.

  The length of the long linear brush hair is preferably 4 to 6 mm. If this long linear brush hair is too short, the elasticity effect will be lost, and the cleaning effect on the groove will be weak, while if it is too long, the hair will be kinked, or it will sag and cannot demonstrate the cleaning effect on the groove There's a problem. What is necessary is just to make a short linear brush hair 1 mm shorter than the length of this long linear brush hair.

    It is preferable that the inner and outer arcuate brush bristles have a shape that coincides with a circular arc centered at the center of the tip of the long linear bristles. When the length of the long linear bristles is 4 to 6 mm as described above, the center point of the arc is located at a height of 4 to 6 mm from the base of the toothbrush body.

  The radius of the arc of the outer arc-shaped brush bristles is preferably about 4.5 mm to 9 mm in consideration of the length of the front teeth and molars, and the teeth and gums are firmly wrapped from the left and right to enable cleaning massage. The tip of the inner and outer arc-shaped brush hairs is overlapped by about 4 to 6 mm, and the elastic force increases by the length of the length, and the elastic force to return makes effective massage on adjacent surfaces, teeth, and marginal gingiva. There is an advantage that can be done. In addition, the circular space | gap around a center point has the advantage that a linear brush hair is pushed in and becomes a space which can exhibit elasticity.

  The toothbrush base portion has a narrow flat base portion and a pair of left and right inclined side portions provided on both sides of the flat base portion and inclined outward. It is preferable to adjust the angle between 30 and 45 degrees so that the width of the toothbrush is not too thick.

  The numerical value of the length of the straight brush hair and the numerical value of the angle formed by the base surface and the inclined side surface portion are calculated from the average values of the front teeth and molars, and indicate the best range.

  The plastic material brush bristles are preferably made of elastic nylon, but in addition to nylon, PBT (polybutylene terephthalate) or PP (polypropylene) can also be used.

  The toothbrush of the present invention simply presses the toothbrush against the teeth from above and pinches them, and the arc-like hair is elastic enough to return, grabbing the teeth and gums, and cleaning exactly where you want to polish. It also enables easy operation and movement, and at the same time, cleaning of tooth grooves, side surfaces, periodontal pockets that are difficult to clean, cleaning teeth and adjacent surfaces of teeth, cervical and marginal gingiva, massage effect by stimulation In addition, dental plaque and food residues that cause periodontal disease can be easily removed, and teeth are reduced (wearing the gums with a continuous straight hair brush, hypersensitivity, root surface erosion) This has a great effect of reducing erosion.

  The toothbrush of the present invention refers to an occlusal occlusion (an occlusal state in which the form and development and function of a tooth are abnormal for some reason, and as a result, cannot operate a normal occlusal function. In many cases, the bristles did not reach and could not be brushed sufficiently, and crowded (octane teeth, messy teeth, etc.). In this case too, the conventional bristles do not reach the bristles and often leave plaque. In addition, the tooth is easy to get dirty, which can cause tooth decay and periodontal disease), and it is also possible to effectively brush the tooth being corrected. It is.

  The brushing method that applies hair at 45 degrees and the scrubbing method that compresses and vibrates are recommended for polishing methods recommended in dentistry, and electric and sonic brushes have been developed with the aim of movement. However, there are many cases in which the back side (the lingual side, the palate side) and the back tooth side (molar part) are not polished, regardless of whether the toothbrush is applied or the angle is inserted manually, whether it is electric or normal. The toothbrush of the present invention can also be easily polished without inserting the toothbrush and pressing and wrapping it.

  The brush bristles of the central brush row of the toothbrush of the present invention are planted so that the length is alternately short and long and uneven, and the brush bristles apply pressure to the fine groove of the molar part It effectively penetrates and exhibits a cleaning stimulation effect to every corner. Moreover, there exists an advantage that the width | variety of the whole toothbrush can be made small by planting the roll-shaped hair | bristle of a side by turns.

  The toothbrush of the present invention has an arc shape (roll shape) and is pressed against the teeth by applying pressure from above to the side inner brush rows and the side outer brush rows facing each other in pairs. The bristles are widened and the tips of the lateral outer brush rows touch the marginal gingiva and the adjacent surface, while the tips of the lateral inner brush rows touch the periodontal pocket, the adjacent surface and the interdental papillary gingiva for accurate and easy Demonstrates cleaning massage effect. When brushing teeth using a conventional toothbrush, the inconvenience that the side surface part, gum part and root surface of the teeth are worn down due to excessive brushing often occurred, but according to the toothbrush of the present invention, By making the side brush bristles arcuate, the bristles come into mild contact with the side portions of the teeth, and such inconveniences are eliminated.

  In the side brush bristles of the toothbrush of the present invention, the central part of the arc-shaped (roll-shaped) brush bristles is roll-shaped with respect to the side surfaces of the teeth, so that the surface area of the brush bristles is in contact with the tooth surface. By moving to, the tooth surface is polished and cleaned. In addition, the brush hair is arcuate due to the occurrence of wedge-shaped defects caused by hypersensitivity caused by wear of the enamel on the side surface, tooth neck and root surface of the tooth due to excessive brushing. In the case of a brush-like brush, there is no inconvenience that the straight-haired bristle directly applies pressure and becomes hypersensitive, and can be easily prevented.

  There are many cases where this type of brushing that causes hypersensitivity is a habit, and it is very difficult to acquire it with the guidance of a solid brushing method. In addition, even in cases where teeth are lined up and are difficult to polish, it is possible to spread the hair tips in the corners with the elasticity that the brush that is curved in an arc shape returns. In this case, as shown in FIG. 6, the toothbrush of the present invention is pushed into the teeth, and can be carried out by a simple operation of moving back and forth in a state where the whole is wrapped.

  Another advantage of the toothbrush of the present invention is that the side brush hairs are directed to the outside because the flocking positions of the side brush hairs on both sides are inclined, so that the arc-shaped brush hairs are on the buccal mucosa and the lingual margin. It is possible to clean. In the toothbrush of the present invention, the pair of right and left inclined side brush bristles is planted in two rows so that the inner side bristles on the inside and the outer side bristles on the outside are alternately positioned. Do not implant the side inner brush row and the side outer brush row so as to be next to each other in order to reduce the width of the brush bristle planting portion, and thus the toothbrush base, and minimize the sense of incongruity. Is adopted.

  When using a normal toothbrush, when inserting a toothbrush on the upper palatal side (inside), the cheek side (outside) is inserted diagonally along the dental arch, but it is inserted straight back. For this reason, there are many cases where periodontal disease is caused and the periodontal pocket is deepened. Even in such a case, if the toothbrush of the present invention is used, the tooth is gradually shifted to the back with the tooth in between, so it is easy to perform a cleaning massage that cleans the teeth and periodontal tissue with equal pressure. There is an advantage that becomes possible.

It is a whole perspective view which shows one embodiment of the toothbrush of this invention. In the top view of the bristle planting part of the toothbrush of the present invention, the upper part of the bristle is omitted. It is the enlarged front view which looked at the toothbrush of this invention from the front end direction. It is a side view which extracts and shows the center brush bristle row of the toothbrush of the present invention. It is explanatory drawing which shows an example in the case of brushing with the toothbrush of this invention. It is explanatory drawing which shows the other example at the time of brushing with the toothbrush of this invention. It is explanatory drawing which shows another example in the case of brushing with the toothbrush of this invention. It is drawing similar to FIG. 3 which shows the other structural example of the toothbrush of this invention. It is a flowchart which shows an example of the manufacture procedure of the toothbrush of this invention.

  In the following, one embodiment of the present invention will be described with reference to the accompanying drawings. However, it is needless to say that these descriptions are given by way of example and should not be construed as limiting.

  In the figure, reference numeral 10 denotes a toothbrush according to the present invention, which is a long grip portion 12, and is connected to the tip of the long grip portion 12 in a straight line and has a large number of elastic brush hairs made of plastic material. And a toothbrush base portion 14 for implanting the toothbrush. More preferably, the brush hair made of plastic material is made of elastic nylon, PBT (polybutylene terephthalate), PP (polypropylene), or the like.

  In addition, in forming the arc-shaped brush hair described later, the brush hair made of shape memory plastic material is preferably used, and the brush hair made of shape memory nylon is more suitable. As the plastic brush hair, a brush hair having a thickness of about 0.1 mm to 0.35 mm is preferably used. If the brush hair is thick, it becomes a hard brush, and if the brush hair is thin, it becomes a soft brush. . As a material for the brush hair made of the memory plastic material, PBT (polybutylene terephthalate) or PP (polypropylene) can be used in addition to nylon.

  More specifically, with regard to the production of arc-shaped brush bristles, a long helical plastic coil is first manufactured and then cut in the longitudinal direction at the central portion to obtain a large number of arc-shaped (coiled) brushes. A bristle material can be easily manufactured, and a side brush bristle row can be formed by implanting the bristle material in the inclined side brush bristle planting portion 18A.

  The toothbrush base portion 14 is formed in a substantially quadrangular prism shape having a substantially frontal trapezoidal shape, as well shown in FIGS. 3 and 5. The toothbrush base portion 14 has a narrow flat base portion 16 and a pair of left and right inclined side surface portions 18 and 18 which are provided on both sides of the flat base portion 16 and are inclined outward. The angle α formed by the base portion 16 and the inclined side surface portion 18 shown in FIG. 3 is preferably about 30 to 45 degrees, and is adjusted so that the width of the toothbrush 10 is not too thick.

  The toothbrush base portion 14 functions as a brush bristle planting portion 14A, the flat base portion 16 is a central brush bristle planting portion 16A, and the pair of left and right inclined side surfaces 18, 18 are a pair of left and right inclined side surfaces. It is set as brush hair planting part 18A, 18A.

  A central brush bristle row 20 is implanted in the longitudinal direction of the central brush bristle planting portion 16A. The central brush bristles 20 use short straight bristles 22 and long straight bristles 24, and the short and long straight bristles 22 and 24 are alternately positioned in the longitudinal direction so as to be uneven. It is formed by planting to become.

  The pair of right and left inclined side brush bristle planting portions 18A and 18A have side inner brush bristle rows 26 and 26 on the inner side and outer side brush bristle rows 28 and 28 on the outer side, as shown in FIG. It is planted in two rows so as to be located in.

  The side inner brush bristles 26, 26 use short inner arc-shaped bristles 26a, and the pair of left and right inner arc-shaped brush bristles 26a, 26a are curved so as to have an elastic arch shape, and the front ends thereof. Are formed so as to be in contact with each other at the contact portions B1 and B2 as shown in FIG. 3, or so as to overlap and intersect at the overlapping portions W1 and W2 as shown in FIG.

  Further, the side outer brush bristles 28, 28 use outer arc brush bristles 28a that are longer than the inner arc bristles 26a, 26a, and the pair of left and right outer arc brush bristles 28a, 28a has an elastic arch shape. It is made to curve so that it may become and each tip part may be planted so that it may touch or cross. The arcuate shape of the inner arcuate bristles 26a, 26a and the outer arcuate brush bristles 28a, 28a is preferably an arcuate shape as shown in FIGS.

  It is preferable that the inner and outer arcuate brush bristles 26a, 28a have a shape that coincides with a circular arc having a central point C at the center of the tip of the long linear bristles 24. When the length of the long linear bristles 24 is 4 to 6 mm as described above, the center point C of the arc is located at a height of 4 to 6 mm from the base 16 of the toothbrush body. Become. Note that the circular gap D around the center point C has an advantage that the linear brush bristles 22 and 24 are pushed into a space where elasticity can be exerted.

  The radius r of the arcs of the outer arc-shaped brush bristles 28a, 28a is preferably about 4.5 mm to 9 mm in consideration of the length of the front teeth and molars, and wraps the teeth and gums from the left and right to enable cleaning massage. . As shown in FIG. 8, the tip portions of the inner and outer arc-shaped brush bristles 26a and 28a are overlapped by about 4 to 6 mm as shown by overlapping portions W1 and W2, and the length is increased. There is an advantage that the elastic force is increased and the adjacent surface, cleaning between teeth, and massage can be effectively performed on the marginal gingiva with the elastic force to return.

  The numerical values of the lengths of the straight brush bristles 22 and 24 and the numerical values of the angles formed by the base portion 16 and the inclined side surface portion 18 are calculated from the average values of the front teeth and molars, and indicate the best range. .

The operation and effect of the above-described configuration will be described.
According to the toothbrush 10 of the present invention, as shown in FIG. 5, the toothbrush 10 is elastically pressed back by simply pressing the toothbrush 10 against the tooth T from above and pinching it. The teeth T and gingiva G are grabbed by the nature, and it is possible to clean exactly where you want to polish.

  In addition, it is easy to move, and at the same time, it cleans tooth grooves, side surfaces, periodontal pockets that are difficult to clean, cleans teeth and adjacent surfaces of teeth, cervical and marginal gingiva, and exerts a massage effect by stimulation. As shown in FIG. 5, the teeth can be brushed with the tips of the outer arc-shaped brush bristles 28a, 28a of the toothbrush 10 inserted into the periodontal pocket PT. Can be easily removed. Furthermore, the toothbrush of the present invention can perform effective brushing against malocclusion and crowding, and can also perform effective brushing on teeth that are being corrected.

  The brushing method that applies hair at 45 degrees and the scrubbing method that compresses and vibrates are recommended for polishing methods recommended in dentistry, and electric and sonic brushes have been developed with the aim of movement. However, there are many cases in which the back side (the lingual side, the palate side) and the back tooth side (molar part) are not polished, regardless of whether the toothbrush is applied or the angle is inserted manually, whether it is electric or normal. Since the toothbrush 10 of the present invention is also simply shifted to the back just by inserting the toothbrush 10 and wrapping it, the toothbrush 10 of the present invention can be polished easily without making a mistake in the direction of shifting to the back as described later.

  As shown in FIG. 4, the brush bristles 22 and 24 of the central brush bristle row 20 of the toothbrush 10 of the present invention are planted so that the lengths are alternately short and long, and are uneven. The bristles 22 and 24 are effectively penetrated by exerting pressure on the fine groove of the molar portion, and exert a cleaning stimulation effect to every corner. Further, as shown in FIG. 2, the width of the entire toothbrush 10 can be reduced by alternately flocking the side roll-shaped bristles 26 a and 28 a as shown in FIG. 2.

  The toothbrush 10 of the present invention is pressed into the teeth T by applying pressure from above to the side inner brush bristle row 26 and the side outer brush bristle row 28 which are in an arc shape (roll shape) and face each other in two pairs. Thus, the brush bristles 26a, 28a are widened, and the tips of the bristles 28a of the side outer brush bristle row 28 abut against the marginal gingiva G and the adjacent surface, while the tips of the brush bristles 26a of the side inner brush bristle row 26 are teeth. Cleans and massages easily and accurately by contacting the peripheral pocket, adjacent surface and interdental papillary gingiva.

  In the side brush bristles 26 and 28 of the toothbrush 10 of the present invention, since the central portions of the arc-shaped (roll-shaped) bristles 26a and 28a are formed in a roll shape with respect to the side surfaces of the teeth, most of the bristles 26a and 28a. The surface area of the tooth comes into contact with the tooth surface and is moved back and forth to polish and clean the tooth surface firmly. In addition, brush hairs 26a and 28a are arcuate due to the occurrence of wedge-like defects caused by hypersensitivity caused by excessive wear of the neck and neck caused by excessive brushing when using the straight hairs of a conventional toothbrush. Therefore, in the case of straight-hair-like brush hair, there is no inconvenience that the straight-hair brush hair directly applies pressure and becomes hypersensitive, and can be easily prevented.

  When brushing with a conventional toothbrush, there was a common inconvenience that the side surface of the tooth was worn down by over-polishing, but according to the toothbrush of the present invention, the side brush bristles are arcuate. By doing so, the bristle comes into mild contact with the side surface portion of the tooth, and the occurrence of such inconvenience is also eliminated.

  There are many cases where this type of brushing that causes hypersensitivity is a habit, and it is very difficult to acquire it with the guidance of a solid brushing method. In addition, even in cases where teeth are lined up and are difficult to polish, it is possible to spread the hair tips in the corners with the elasticity that the brush that is curved in an arc shape returns. In this case, the toothbrush 10 of the present invention is pushed into the teeth T, and can be carried out by a simple operation of moving back and forth in a state where the whole is encased.

  Another advantage of the toothbrush 10 of the present invention is that the side brush bristles 26a and 28a are directed outward because the flocking positions of the side brush bristles 26a and 28a on both sides are inclined side surfaces, and as shown in FIG. Thus, the arc-shaped brush bristles 26a, 28a enable the buccal mucosa H and the lingual edge S to be cleaned. In the toothbrush 10 of the present invention, the pair of right and left inclined side brush bristle planting portions 18A are arranged in two rows so that the side inner brush hair row 26 and the outer side brush hair row 28 are alternately located on the inner side. In order to reduce the width of the toothbrush base portion 14 and thus the brush bristle planting portion 14A, the side inner brush bristle row 26 and the side outer brush bristle row 28 are not implanted so as to be next to each other. This form is adopted in order to minimize the uncomfortable feeling.

  When inserting a toothbrush on the upper palatal side (inner side), the cheek side (outer side) is inserted diagonally outward along the dental arch, but it is inserted back straight, resulting in periodontal disease. In many cases, the periodontal pocket is deepened. Even in such a case, if the toothbrush 10 of the present invention is used, as shown in FIGS. 6 and 7, the teeth T are gradually shifted to the back with the teeth T interposed therebetween. There is an advantage that a cleaning massage for cleaning the entire tissue can be easily performed.

An example of the manufacturing method of the above-described toothbrush 10 of the present invention will be described with reference to FIG.
First, the following four steps (step 100 to step 106) are performed as a preparation step.

  A toothbrush base portion provided with a central brush bristle planting portion formed on the base and a pair of left and right inclined side brush bristle planting portions is produced (step 100).

  Next, a plurality of linear brush hair concentrators obtained by converging a plurality of linear brush hairs are prepared (step 102).

  A plurality of short inner arc-shaped bristles that are formed by converging the plurality of short inner arc-shaped brush hairs are prepared (step 104).

  A plurality of long outer arcuate bristles that are formed by converging the plurality of long outer arcuate bristles are prepared (step 106).

  Subsequently, the following three steps (steps 108 to 112) are performed as the planting step.

  A plurality of the straight brush bristle converging portions are implanted at predetermined intervals in the longitudinal direction of the central brush bristle planting portion (step 108).

  A plurality of the short inner arcuate bristles are planted at predetermined intervals on the inner side in the longitudinal direction of the inclined side bristle planting part (step 110).

  A plurality of long outer arc-shaped brush bristles are arranged at a predetermined interval so as to be located outside the inclined side brush bristles in the longitudinal direction and between the implanted short inner arc-shaped bristles. And planting (step 112).

  When the planting process is thus completed, the toothbrush 10 of the present invention is completed.

  DESCRIPTION OF SYMBOLS 10: Toothbrush, 12: Elongate grip part, 14: Toothbrush base | substrate part, 14A: Brush hair planting part, 16: Flat base part, 16A: Center brush hair planting part, 18A: Inclined side brush hair planting part , 18: inclined side surface portion, 20: central brush hair row, 22: short linear brush hair, 24: long straight brush hair, 26: side inner brush hair row, 26a: inner arc brush hair, 28: side outer side Brush hair row, 28a: outer arc brush hair, B1, B2: contact portion, C: center point, D: gap, T: tooth, G: gingiva, H: buccal mucosa, S: lingual margin, TP: periodontal Pocket, W1, W2: overlapping portion, r: radius of the arc of the outer arc-shaped brush bristles, α: angle formed by the base portion and the inclined side surface portion.

Claims (2)

  A long grip portion, and a toothbrush base portion that is linearly connected to the distal end portion of the long grip portion and has a plurality of elastic plastic material brush hairs, The toothbrush base portion is formed in a columnar shape including a narrow central brush bristle planting portion and a pair of left and right inclined side brush bristle planting portions provided on both sides of the central brush bristle planting portion and inclined outward. Forming a center brush bristle row so that short and long straight brush hairs are alternately positioned in the longitudinal direction in the central brush bristle planting portion to form irregularities, and the pair of right and left inclined side surfaces In the brush bristle planting portion, side inner brush rows on the inside and side outer brush rows on the outer side are planted in two rows so that they are alternately positioned, and the side inner brush rows are short inner arc brushes. Using a bristle, the pair of left and right inner arc-shaped brush bristles are elastic arch shapes The outer side brush bristles are longer than the inner arc-shaped bristles, and are formed so as to be curved and planted so that the respective tip portions contact or intersect with each other. A toothbrush formed by curving the pair of left and right outer arc-shaped brush bristles into a resilient arch shape and being planted so that the respective tip portions contact or intersect with each other .   The toothbrush according to claim 1, wherein the inner and outer arc-shaped brush bristles have a shape that coincides with a circular arc centered at a center of a tip of the long linear bristles.

Images