KR20180018477A - toothbrush - Google Patents

Abstract

The present invention provides a toothbrush which can clean the teeth well without accompanying the anxiety of pain on the gums during operation. The toothbrush 10 of the present invention is provided with a first hair-removal hole 19A and a plurality of second hair-removal holes 19A arranged around the first hair-removal hole 19A, A circular head portion 16 and a first hair bundle 14A formed in the first hair kneading hole 19A and a plurality of second hair kneading holes 19B and 19B in plan view with the hair- 19B, and the tip end of the first hair bundle 14A is protruded beyond the tip ends of the plurality of second hair bundles 14B.

Description

toothbrush

The present invention relates to a toothbrush.

The present application claims priority based on Japanese Patent Application No. 2015-119231 filed on June 12, 2015, the content of which is hereby incorporated by reference.

One so-called one tuft toothbrush is used as an auxiliary tool for carefully wiping the "border between teeth and gums". The advantage is that the brush part is composed of only one bundle, so that the interference of the head part in the oral cavity is smaller than that of a general toothbrush, and the tip can be precisely touched to the part to be wiped.

Conventionally, in order to improve the cleansing property of the teeth in a general toothbrush, a technique of forming a central wicker and a wick structure such as a one-tooth wick by inclining the peripheral wicker to the inner side so as to surround the central wick is disclosed (Patent Document 1) . In addition, a toothbrush provided with a tuft of a tuft and a plurality of collective assemblies common to the rear side on the tip side of the flocked portion is disclosed (Patent Document 2).

Japanese Patent Application Laid-Open No. 2008-142371 Japanese Patent Application Laid-Open No. 11-83462

Since the current one-tooth toothbrush is composed of only one brush bundle, the pressure on the gums is inevitably exerted locally as compared with a general toothbrush.

In particular, periodontal disease patients tend to desire a touched toothbrush that does not irritate the gum as much as possible, in order to avoid pain or bleeding during cleaning.

In addition, the one-tooth toothbrush is less likely to interfere in the oral cavity due to the compactness of the head, and therefore it is difficult to perceive where the brush (hair bundle) of the head will touch during operation compared with a general toothbrush. For this reason, it is very difficult to accurately bring the "sharpened brush" into contact with the cleaning area without fear of pain in the gums.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a toothbrush which can clean the teeth well without causing pain to the gums during operation.

A toothbrush according to an embodiment of the present invention includes a head portion having a plurality of teeth on a wicking surface and a handle body extending from the head portion, And a circular head portion which is disposed in the periphery of the first foot and has a plurality of second pattern portions which are larger in diameter than the first pattern portion, And is protruded from the distal end of the foot. Here, the circular shape in plan view means a substantially circular shape not including an elliptical shape, and includes a shape that is not completely circular due to the effect of processing accuracy.

The toothbrush of the embodiment of the present invention is characterized in that the plurality of second feet are concentrically arranged around the first pattern and the plurality of second feet are arranged in the direction of the normal line Or may be inclined toward the first hair bundle.

The toothbrush according to an embodiment of the present invention may have a configuration in which the inclination angle of the second demballet with respect to the normal direction of the eating surface is set at 10 degrees or less.

In the toothbrush of the embodiment of the present invention, the second hair bundle may have a configuration in which the hair length of the hair gradually becomes longer toward the first hair bundle from the outside of the head portion.

In the toothbrush of the embodiment of the present invention, the first hair bundle is erected by inserting a flat line sandwiched between two bundles of folded hair bundles into a first hair-implanting hole formed on the hair bristle, Is formed by inserting a flat line sandwiched between two bundles of folded folds into a second flue hole formed in the food wick, wherein the first bundle and the second bundle are arranged in parallel with each other, A configuration may be employed in which a difference in the parent length is formed in one half hair bundle and the second half hair bundle.

In the toothbrush of the embodiment of the present invention, the diameter of the second hair-removal bore may be 2 mm or more and 3.5 mm or less.

In the toothbrush of the embodiment of the present invention, even when the distance between the hole edges of the nearest flocking holes in the first flocking hole and the plurality of second flocking holes is 0.4 mm or more and 0.7 mm or less do.

The toothbrush of an embodiment of the present invention may have a configuration in which the difference in the length between the first half tuft and the second half tuft is within a range of 1 mm or more and 3 mm or less.

In the toothbrush of the embodiment of the present invention, the number of the second legs may be 5 or more and 8 or less.

The toothbrush of the embodiment of the present invention may be configured such that the first leg is constituted by ST appearance. The ST appearance is super tapered, and the shape of the tip is thin.

In the toothbrush of the embodiment of the present invention, the head length of the head portion and the dimension of the head width in the direction crossing the head length may all be 9 mm or more and 16 mm or less. Here, the head length of the head portion is a length along the extending direction of the handle body, and the head width is a length in the direction crossing the extending direction of the handle body.

In the present invention, it is possible to provide a toothbrush that can clean the teeth well without causing any anxiety of pain on the gums at the time of operation.

1 is a plan view of a toothbrush according to a first embodiment.
2 is a rear view of the toothbrush shown in Fig.
Fig. 3 is a view of the toothbrush shown in Fig. 2 from B. Fig.
4 is an enlarged front view of a portion surrounded by the area A of the toothbrush shown in Fig.
5 is a cross-sectional view taken along the line A-A 'in Fig.
6 is a view showing the head portion of the toothbrush of the second embodiment.
Fig. 7 is a perspective view showing the configuration of the foot of the toothbrush of the second embodiment. Fig.
8 is a view showing the head portion of the toothbrush of the third embodiment.
Fig. 9 is a view showing a structure of an outer peripheral collect foot.

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

[First Embodiment]

1 is a plan view of a toothbrush according to a first embodiment of the present invention. 2 is a rear view of the toothbrush shown in Fig. Fig. 3 is a view of the toothbrush shown in Fig. 2 from B. Fig.

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

1 to 3, an example of a toothbrush 10 according to the present invention is shown by exemplifying a one-tooth brush, and the following description will be given.

As shown in Figs. 1 to 3, the toothbrush 10 of the present embodiment has a handle body 11 and a female thread 14. The head portion 16 is a substantially columnar member in plan view extending in the Z-direction (or in a slightly inclined direction with respect to the Z-direction). Here, the circular shape in plan view means substantially a circle, and includes a plane which does not become a perfect circle due to the effect of processing accuracy.

The handle body 11 is a face on the side on which the pattern 14 protrudes and has a flat face 16a.

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

The neck portion 18 is a member extending in a slightly inclined direction with respect to the X direction, and is made thinner than the handle portion 17. One end of the neck portion 18 is integrally formed with the head portion 16 and the other end is formed integrally with the handle portion 17. That is, the neck portion 18 connects the head portion 16 and the handle portion 17.

Fig. 4 is a front view of the toothbrush shown in Fig. 1, which is an enlarged view of a portion surrounded by the area A. Fig. 5 is a cross-sectional view taken along the line A-A 'in Fig. Fig. 5 corresponds to the enlarged view of the portion surrounded by the area C of the toothbrush shown in Fig. 3, which is inverted upside down.

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

As shown in Fig. 4, in the head portion 16, a plurality of hair-removal holes 19 are formed in the hair-removal area formed on the side of the one surface 16a. The plurality of hair-removal holes 19 are formed by a first hair-removal hole 19A located at the center of the head portion 16 and a plurality of second hair-removal holes 19A concentrically arranged around the first hair- Hole 19B, each of which is opened on one surface 16a of the head portion 16. [0035] In the present embodiment, six second hair-removal holes 19B are formed around the center first hair-removal hole 19A.

The diameter of the first hair-knife hole 19A is 1.4 mm, the diameter of the second hair-knife hole 19B is 2.2 mm, and the diameter of the second hair- The hole 19B is larger (φ1> φ2). The diameter? 1 of the first hair-kneading hole 19A is not limited to 1.4 mm, but can be appropriately set within a range of 1 to 2 mm. The diameter (2) of the second hair-removal hole (19B) is not limited to 2.2 mm, but can be appropriately set within a range of 2 to 3.5 mm. The difference between the diameter? 1 of the first hair-kneading hole 19A and the diameter? 2 of the second hair-kneading hole 19B is preferably 0.3 mm or more, more preferably 0.5 mm or more and 1.5 mm or less.

The depth d of each hair-removal hole 19 in the Z direction with respect to the one surface 16a can be appropriately set within a range of 3.0 to 6.0 mm, for example.

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

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

As shown in Fig. 5, the bundle 14 is composed of a central bundle (first bundle) 14A that is worn on the first capillary hole 19A and a plurality of second capillary holes (Six) outer peripheral wedge bundles (second wedge bundles) 14B that are formed on the outer periphery of the outer periphery of the stator. The outer peripheral bundle 14B is larger in diameter than the central bundle 14A and is a massive bundle.

Further, the number of the outer peripheral core bundles 14B is not limited to six, but may be five or seven or more.

In addition, the number of the outer peripheral core bundles 14B is set in accordance with the size of the straight face 16a, and is preferably 5 or more and 8 or less.

The central corrugated pattern 14A and each outer corrugated pattern 14B extend perpendicularly to one surface 16a of the head portion 16.

The central mold core 14A has a buried portion 14a and a columnar portion 14b. The outer peripheral core layer 14B has a buried portion 14a, a columnar portion 14b and an inclined portion 14c. The buried portion 14a is a portion accommodated in the hair-removing hole 19. The outer peripheral core bundle 14B has a larger diameter than the central core bundle 14A. The diameter of the central core tuft 14A is preferably 1 mm or more and 2 mm or less. The diameter of the outer peripheral aggregate 14B is preferably 2 mm or more and 3.5 mm or less. In the present embodiment, the diameter of each step corresponds to the diameter of the flocked hole.

The central pattern 14A is longer than the outer peripheral pattern 14B (14B, 14B...)) And the end face 1a of the pattern is substantially parallel to the face 16a. On the other hand, each of the outer peripheral corrugated fins 14B is inclined with respect to each extending direction and one face 16a. This "inclination" includes not only a shape in which the bundle end face 1b is linear as shown in FIG. 5 but also a curved shape that is concave or a curved shape that protrudes. In addition, the end face 1a of the core bundle 14A has a substantially circular shape in plan view, and the end face 1b of the bundle bundle 14B in the outermost bundle 14B has an elliptical shape in plan view.

The appearance that constitutes the central pattern (14A) is a ST model (super tapered model) having a thickness of 6 mils. The outermost bundle 14B is made up of a 4 mils straight hair having the same diameter to the tip. The central length L1 of the central corrugation 14A is 8 mm.

On the other hand, the outer peripheral sheath 14B is constituted by bundling a plurality of pieces having different hair lengths into a bundle.

More specifically, the mother hair lengths L2 to L3 gradually increase from the outer side of the concentric circle toward the center (the central hair bundle 14A), and the hair length is in the range of 5 to 7 mm. By making the inclination of the outermost corrugated pattern 14B provided around the central corrugated pattern 14A as a whole, the corrugated pattern 14 constitutes a dome shape in which the central corrugated pattern 14A is protruded as a whole .

The head portion 16 has a substantially circular shape in plan view, the head width W in the Y direction is 12 mm, and the head length L in the X direction is 15 mm.

As described above, the head length of the head portion is a length along the extending direction of the handle body, and the head width is a length in the direction crossing the extending direction of the handle body. In the present embodiment, the head length of the head portion 16 and the dimension of the head width in the direction crossing the head length are all 9 mm or more and 16 mm or less.

The toothbrush 10 of the present embodiment has a bundle of bobbins 14 around the central bundle of stamens 14A in which the outer bundles 14B having a larger diameter than the central bundles 14A are arranged concentrically . The protruding central tufts 14A clean the gums and the outer tufts 14B gently clean the surrounding gums.

The " softness " of the outer peripheral sheath 14B depends on the diameter, length, material, and appearance of the modulator, and is influenced by the "soft touch feeling" required for the periodontal ligament to be described later and the " Elasticity " of the " elasticity ".

Unlike the toothbrush constructed by one foot, the toothbrush 10 of the present embodiment forms the brush (the pattern 14) with a plurality of feet, so that the pressure is not locally applied to the cleaning area. That is, out of the plurality of bundles constituting the bundle 14, the outer bundle 14B is larger than the central bundle 14A. Therefore, the boundary line of the mass production is eliminated at the tip of the brush, and the bending behavior as "one large mold bundle" is included in the "plural bundles" including the central bundle 14A located at the center.

By the effect of the integrated bending behavior, it is possible to alleviate the local pressure load at the time of cleaning the gum portion as compared with a normal one-touch brush. This makes it possible to secure a "soft touch feeling" necessary for the periodontal ligament.

On the other hand, the protruded central pattern 14A plays a role in the " cleaning force for a narrow area " necessary for partial wiping. Since the central hair bundle 14A supports the periphery by the plurality of outer peripheral hair bundles 14B, the hair stylus does not deviate from a narrow region and has a "moderate hair elastic force for scraping contamination".

The toothbrush 10 of the present embodiment is also advantageous in comparison with a conventional one-toothbrush brush in terms of "ease of use as a partial-polishing brush".

The specification of a conventional one-toothbrush is that it is difficult for the head portion 16 to interfere with the oral cavity, and it is difficult to perceive where the brush portion touches during operation. Therefore, it is difficult for the user to precisely touch the cleaning part with the "sharpened brush part" without accompanying the uneasiness of the pain. In addition, it is difficult to adjust " acceleration / deceleration "

In contrast to this, the toothbrush 10 of the present embodiment can appropriately contact the periphery (teeth, gums) of the place where the soft outer peripheral ridge 14B is to be wiped, thereby relieving uneasiness during the cleaning as described above. Further, since the outer peripheral corrugation 14B appropriately contacts the teeth and the gums, it becomes a guide station for guiding the central corrugation 14A to a place to be cleaned.

In addition, since the outer periphery of the central corrugation 14A blocks outwardly, the central corrugation 14A is not excessively warped even when the corrugation length is longer than that of a general one-touch brush.

As described above, according to the toothbrush 10 of the present embodiment, it is possible to clean the teeth well without the fear of pain on the gums at the time of operation.

In addition, there is no particular limitation on the detailed shape of protruding the central cored bundle 14A than the outer corundum group.

In order to improve the soft touch feeling on the gum, it is preferable to arrange the tip of the brushes of the central corrugation 14A and the outer corrugation 14B together so as to be in a series of gentle curves.

On the other hand, when a large interdental space is assumed, it is preferable to form a step of 1 mm to 2 mm in the projecting width of the central corrugation 14A.

The shape of the bundle shape and the shape of the flap hole are not particularly limited. In order to unify the warping of the whole bundle, a plurality of outer peripheral bundles 14B are arranged around the central bundle 14A as points, and the outer bundle bundle 14B is formed into a substantially triangular or substantially fan shape, It is also effective to reduce the distance between them.

[Second Embodiment]

Next, the configuration of the second embodiment according to the present invention will be described.

The basic configuration of the toothbrush of the present embodiment shown below is substantially the same as that of the first embodiment, but differs in the configuration of the modabul. Therefore, in the following description, portions different from those of the above-described embodiment will be described in detail and description of common portions will be omitted. In each drawing used in the description, the same reference numerals are given to the constituent elements common to those in Figs. 1 to 5.

6 is a view showing the head portion of the toothbrush of the second embodiment. Fig. 7 is a perspective view showing the configuration of the foot of the toothbrush of the second embodiment. Fig.

As shown in Figs. 6 and 7, the toothbrush 20 of the present embodiment has a plurality of outer peripheral hair bundles (second hair bundles) 24B provided around the central hair bundle (first hair bundle) 24A, (24) inclined inward toward the central corrugation (24A) with respect to the normal direction of the central corrugation (16a). As a result, the density of the appearance of the hair of the hairdresser 24 at the hair tip portion is increased, and a higher " soft touch feeling " can be secured.

In the present embodiment, the difference in the length of the corners of the plurality of outlines constituting the central corrugation 24A and the outer corrugation 24B is within a range of 1 mm to 3 mm.

Here, the " parent length difference " indicates a difference in parent length between the features constituting the outer parent blade 24B and the appearance of the central parent blade 24A, (24A) of the near side and the central lamella (24A) is 1 mm or more, and the outermost lamella (24A) is the farthest from the central lamella (24A) The length difference is preferably 3 mm or less.

As described above, according to the toothbrush 20 of the present embodiment, it is possible to achieve both the invasion of the wounds into the narrower cleaning area and the soft touch to the gums.

In this embodiment, it is preferable that the inclination angle [theta] of each outer peripheral wedge 24B with respect to the one face 16a is up to 10 degrees. In the case of flat-knot flocking, a method of putting the flock vertically against the wicking face (one face 16a) is generally used. Therefore, in the case where the inclination of the modulator relative to the normal direction of the mold core is 10 degrees or more, it is difficult to perform the molding operation. The same is true of in-mold dehydrators that do not use flat lines.

[Third embodiment]

Next, the configuration of the third embodiment according to the present invention will be described.

The basic configuration of the toothbrush of the present embodiment shown below is substantially the same as that of the first embodiment, but differs in the configuration of the modabul. Therefore, in the following description, portions different from those of the above-described embodiment will be described in detail and description of common portions will be omitted. In each drawing used in the description, the same reference numerals are given to the constituent elements common to those in Figs. 1 to 5.

8 is a view showing the head portion of the toothbrush of the third embodiment. Fig. 9 is a view showing a structure of an outer peripheral collect foot.

As shown in Fig. 8, the toothbrush 30 of the present embodiment has a plurality of outer peripheral hair bundles (second hair bundles) 34B provided around the central hair bundle (first hair bundle) 34A, 16). That is, each of the outer peripheral wales 34B is formed so that the first semi-wicker 34A on the central wick 34A is longer than the second wick 35B.

More specifically, as shown in Fig. 9, the outer peripheral corrugated sheet 34B is stitched by piling a flat line 35 sandwiched between two corrugations folded into the first flat plate hole 19A, and a flat line 35 A difference in the length of the main body M is formed between the first semicircular bundle 34A and the second semicubstruct 34B.

According to the toothbrush 30 of the present embodiment, the manufacturing process can be simplified because the mother cutting process for adjusting the parent length of the outer peripheral corrugation 34B is not performed. As in the previous embodiment, a dome-shaped brush having a convex central pattern 34A can be formed without performing such a mother cutting process. This is effective when the outer peripheral stems 34B are constituted by the ST streaks.

In the present embodiment, in the case of applying offset flocking to the outer peripheral corrugation 34B, the difference in the length between the first and the second half tufts 34A and 34B due to the offset is set to be 1 mm to 3 mm Within the above range. When the difference in the parent length is within 1 mm, the effect of offset flocking is hardly realized. In addition, when the difference in the parent length exceeds 3 mm, since the step is clear in the outer peripheral wedge 34B, the feeling of contact with the gum decreases.

Example

Hereinafter, the present invention will be described in detail by way of examples, but the present invention is not limited by the following description.

(Preparation of toothbrushes of Examples 1 to 6 and Comparative Examples 1 to 3)

The toothbrushes (C1 to C6) of Examples 1 to 6 were produced as the toothbrushes shown in Figs. 1 to 5 under the conditions shown in Table 1. The toothbrushes (D1 to D3) of Comparative Examples 1 to 3 were produced under the conditions shown in Table 2.

In Example 4, a straight hair was used as a central hair bundle.

In Example 5, the diameter of the outer peripheral stepped portion was set to 1.7 mm, which is 2.0 mm or less.

In Example 6, the diameter was set to 2.0 mm or more in both the central and outer peripheral bundles.

In Comparative Example 1, the diameter of the central modulo was larger than the diameter of the outer periphery.

In Comparative Example 2, the tip end of the outer peripheral aggregate was made flat like a central core bundle.

In Comparative Example 3, two central bundles were provided, and a plurality of outer bundles were provided so as to surround them.

Evaluation of the cleaning feel of the partial wiping of the toothbrushes (C1 to C6) of the first to sixth embodiments and the toothbrushes (D1 to D3) of the first to third comparative examples, the excellent touch feeling on the gums, I did.

In the evaluation, the use feeling was rated as "good", "good", "fairly", "not so bad" and "bad", respectively.

The results are shown in Table 1.

As shown in Table 1, in the case of the brush configuration in which the outer peripheral tufts are arranged around the center massager, under the conditions shown in the first embodiment, with respect to the cleaning sensation of partial wiping, , It was confirmed that good results were obtained, respectively.

In the second embodiment, the outer peripheral corrugation is inclined toward the central corrugation, so that the density of the corpuscles at the coronal portion is increased and the feeling of contact with the gum is improved as compared with the first embodiment.

In the third embodiment, the outer convex dome is offset, and a stamper is provided on the outer end of the stamina while the ST sham is used for the outer stamina. Thus, the central convex dome can be formed in the same manner as in the first embodiment. Therefore, it was confirmed that the sensation of cleaning the partial wiping and the feeling of contact with the gum were improved as compared with those of Example 1.

In Example 4, it was confirmed that the use of 6 mils of straight hair as the appearance of the central modal drop slightly deteriorated the sense of cleaning as partial wiping and the feeling of excellent contact with the gum.

In Example 5, the diameter of the outer periphery was 1.7 mm, which is smaller than that of the Example, and the feeling of excellent contact with the gum is slightly poor as compared with Example 1. [

In Example 6, since the diameter of the central modulator and the diameter of the outer periphery are both larger than those of the other embodiments, the soft touch of the gum is excellent, but the tip of the brush, in particular, the central modal leg is hard to enter the cleaning portion. In addition, the size of the head portion is 18 mm in head length and 15 mm in head width, which is larger than that in Embodiment 1. For this reason, it was confirmed that the cleaning feeling and the operability as a partly wiping were slightly poorer than those in Example 1.

Further, as shown in Table 2, in Comparative Example 1, since the diameter of the central modulger is larger than the outer peripheral shafts, it is difficult for the tip of the brush to enter the cleaning portion, And it is confirmed that it largely falls behind.

In the comparative example 2, the central corrugation and the outer corrugation are formed to have the same corn length, and the corrugated corrugated sheet is flat as a whole, so that it is not suitable for partial wiping and little sensation of cleaning is obtained.

In Comparative Example 3, the outer peripheral tufts are provided in the shape of an ellipse around the two central modulars, making it difficult for the tip of the brush to enter the cleaning portion. Further, the head length in the head portion is 17 mm, which is larger than that in the first embodiment. Therefore, it is confirmed that the sense of realization of the cleaning, the feeling of touching, and the operability thereof are largely inferior to those of the first embodiment.

(Feeling of cleaning of interdental space)

From the results of Comparative Example 2, it was confirmed that almost no cleaning sensation as partial wiping was obtained in the case of a flat shape having the same mother length of the central wing and outer wing.

(Evaluation of soft touch feeling on gums)

From the results of Comparative Example 1 and Comparative Example 3, it was confirmed that when the diameter of the central modal leg was equal to or larger than the diameter of the outer legs, the feeling of soft touch on the gum was lowered. In Example 6, although the central gathered portion is smaller than the diameter of the outer gathered gathered portion, the diameter of the central gathered bundle and the outer peripheral gathered portion are larger than those of the other embodiments, .

(Evaluation of operability in oral cavity)

From the results of Example 6 and Comparative Example 3, it was confirmed that the operability in the oral cavity was lowered by increasing the shape of the head portion.

From the above evaluation, it is preferable that the thickness of the outer peripheral legs is set to 2.0 mm or more in order to secure a soft touch feeling on the gums of the toothbrush. There is no particular upper limit to the thickness of the outer peripheral aggregate, but it is preferable that the outer diameter does not exceed 2.2 mm from the viewpoint of operability. On the other hand, the lower limit of the thickness of the outer peripheral gathered foot is not particularly limited as long as it is larger than the thickness of the central gathered feet, but it is preferable that the diameter is 1.4 mm or more to secure a feeling of contact with the gum. At that time, too, it is necessary to install a large amount of water repellency in order to prevent the distance between the outer peripheral wedges from widening. The distance between the corrugations is the distance between the edge of the hole of the flocking hole which is the closest neighbor, and is preferably 0.4 mm or more and 0.7 mm or less. When the distance between the hole edges is less than 0.4 mm, the head portion becomes unstable in terms of strength. When the distance between the hole edges is larger than 0.7 mm, it is difficult to bend the integral foot.

As for the thickness of the features constituting the hair bundle, it is possible to appropriately select the thickness of the brush so as to adjust the hardness of the brush according to the symptoms of the user's gums, as in a general toothbrush. However, in order to secure the feeling of contact with the gum and the quality of the toothbrush, it is preferable that the thickness of the outer peripheral leg is in the range of 3 mil to 6 mil. If the thickness of the feature is less than 3 mils, self-standing and durability of the modulator deteriorate. Further, when the thickness of the features is 6 mils or more, it is difficult to secure a feeling of touch.

The thickness of the features constituting the central corrugation is preferably 4 mil or more because a certain amount of resilient force is required in order to secure the cleaning property of the gingival portion. It is desirable that the upper limit does not exceed 8 mil so as not to injure the gums.

In terms of operability in the oral cavity, it is preferable that both the head length and the head width of the head portion are 16 mm or less.

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. It will be understood by those skilled in the art that various changes or modifications can be made within the scope of the technical idea described in the claims, and it is understood that they belong to the technical scope of the present invention naturally.

For example, in each of the above-described embodiments, a configuration is described in which the outer periphery foot is provided in the center of the center around the central modulator. However, the outer periphery may be provided multiple times.

In addition, the configuration in which the flat wire is formed by being inserted into the flat wire hole is exemplified, but the present invention is not limited thereto. In addition to the flat wire-type molding method, the molding method of the foot of the foot is a heat fusion method in which the lower end of the foot is press-fitted into a molten resin to be attached to the head, and the lower end of the foot is heated to form a molten mass. And an in-mold method in which molding is performed.

L: head length M:
W: Head width 10, 20, 30: Toothbrush
14, 24:
14A, 24A, and 34: central corn bundle (first corn bundle)
14B, 24B, and 34B: outer bundle (second bundle)
16: head portion 16a: one surface (food surface)
19: flock hole 19A: first flock hole
19B, 19B: a second hair-removal hole 34a: a first hair-
34b: second sheet metal 35: flat
L1, L2: Overall length

Claims (11)

And a circular head portion as viewed in a plane having a first pattern on the wrist surface and a plurality of second pattern on the periphery of the first gather and forming a larger diameter than the first pattern,
And a tip of the first massage is protruded from a tip of the second massage. The method according to claim 1,
Wherein the plurality of second feet are arranged concentrically with respect to the first pattern and the plurality of second feet are inclined toward the first pattern with respect to the normal direction of the pad. 3. The method of claim 2,
Wherein the angle of inclination of the second footbath with respect to the normal direction of the cooking cavity surface is 10 degrees or less. 4. The method according to any one of claims 1 to 3,
And the second hair bundle has a gradually increasing hair length from the outside of the head toward the first hair bundle. 4. The method according to any one of claims 1 to 3,
The first mold bundle is formed by inserting a flat line sandwiched between two bundles of folded bundles into a first capillary hole formed in the mold core,
Wherein the second hair bundle is erected by inserting a flat line sandwiched between two bundles of folded hair bundles into a second hair removal hole formed in the hair removal core,
The toothbrush of claim 1, wherein the first and second hair bundles have a difference in the length of the first hair bundle from the first hair bundle and the second hair bundle from the first hair bundle to the first hair bundle. 6. The method of claim 5,
And the diameter of the second hair-removal hole is 2 mm or more. The method according to claim 5 or 6,
In the first flocking hole and the plurality of second flocking holes,
And the distance between the adjacent hole edges of the hairpin holes is 0.4 mm or more and 0.7 mm or less. 8. The method according to any one of claims 1 to 7,
Wherein a difference in the length of the first half of the first half tuft and a length of the second half tuft is within a range of 1 mm or more and 3 mm or less. 9. The method according to any one of claims 1 to 8,
Wherein at least five of said second feet are provided. 10. The method according to any one of claims 1 to 9,
Wherein the first footbath is comprised of ST features. 11. The method according to any one of claims 1 to 10,
Wherein a head length of the head portion and a dimension of a head width in a direction crossing the head length are both 16 mm or less.

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