JP5228219B2 - Liquid dentifrice application brush - Google Patents

Description

The present invention relates to a liquid dentifrice application brush used for applying a liquid dentifrice to gums and teeth .

In general, toothpaste uses a toothpaste and a toothbrush, and a toothpaste and a liquid toothpaste are used.
In any case, a toothpaste containing plaque degrading agent, fluorine, abrasive, etc. is attached to the toothbrush, the tooth surface or gum is rubbed with the brush tip of the toothbrush, and the food on the tooth surface or between the teeth with the sharp tip of the brush Debris is removed.

JP 2002-345560 A JP-A-11-209256

However, for example, in the toothbrush disclosed in Patent Document 1, in the configuration in which a plurality of bristles bundles in which thin bristles are bundled, the gums are easily damaged at the sharp tip of the brush. In particular, parents often brush their infants, but children tend to dislike this brushing, and as a result, the possibility of unpolished remains increases. In addition, due to the elasticity of the tip of the brush, there is a problem that splashing occurs when brushing and soils the clothes.
Such a problem is likely to occur in a liquid dentifrice as disclosed in Patent Document 2.

  The present invention has been made in view of the circumstances described above, and for this purpose, it is easy to apply to the gums and teeth without damaging the gums and teeth while suppressing the occurrence of splashes of the liquid dentifrice, and the medicinal ingredients to the gums and teeth. In particular, it is to provide a liquid dentifrice application brush that is suitable for parents to apply to children and a liquid dentifrice for use in this application brush.

The said subject which concerns on this invention is achieved by the liquid dentifrice application brush which combined the following structure (1)-(5) .
(1) Provided with a brush portion that has a plurality of protruding hairs made of a low resilience elastic material on both the front and back surfaces, multiple surfaces, or the entire circumferential surface and applies a liquid dentifrice .

  According to the liquid dentifrice application brush configured as described above (hereinafter, also referred to as “application brush of the present invention”), the liquid dentifrice droplets are generated by a configuration in which a plurality of protruding hairs made of a low resilience elastic material are arranged. Suppressing and arranging protruding hairs on both front and back surfaces, multiple surfaces or the entire circumference, it can be applied quickly and accurately, and can be applied evenly and efficiently to the upper and lower teeth at the same time. Can be applied effectively.

(2) The virtual contact surfaces (surfaces in contact with the gums and teeth) of the plurality of protruding hair tip portions have at least one concave curved surface portion .
Due to the configuration in which the virtual contact surface of the tip of the protruding hair arranged on both front and back surfaces, multiple surfaces, or the entire peripheral surface has at least one concave curved surface portion, this concave surface can sufficiently hold the liquid dentifrice, and to the gums and teeth The hit is more effective.

(3) The hardness of the protruding hair is 15 N / cm ² or less .

(4) The low resilience material is made of silicone rubber or thermoplastic elastomer .
According to the liquid dentifrice application brush configured as described above, it is possible to more reliably suppress the occurrence of splash of the liquid dentifrice during application by having a predetermined low rebound resilience state. In addition, the gums and teeth are not damaged, and the child is not disliked.

(5) A rod-like grip part having a rear end circumferential convex part and an intermediate part circumferential convex part, and a curvature adapted to the side curvature of the child's teeth from the intermediate circumferential convex part of the grip part to the brush part. With a neck that extends .

  According to the liquid dentifrice application brush constructed in this way, the periphery of the rear end portion of the grip portion, whether applied to its own teeth or applied by others (especially when applied to a child by a parent) Because the little convex finger mainly hangs in the direction convex part and the thumb or index finger mainly hangs in the circumferential convex part in the middle part of the grip part, even in palm grip or pen grip, hold the grip part surely and softly Can be applied to the gums and teeth gently. Furthermore, the neck portion extending from the intermediate circumferential convex portion of the grip portion to the brush portion with a curvature adapted to the side curvature of the child's teeth can be easily moved according to the curvature of the teeth. And it is more convenient for parents to brush against their children because they are less disliked.

  As the low resilience material constituting the brush portion of the present invention, there is an elastomer. Specifically, silicone rubber or thermoplastic elastomer can be applied. With such a configuration, the occurrence of splashing liquid dentifrice is suppressed, and the protruding hairs are arranged on both the front and back, multi-faces or the entire circumference, so it can be applied quickly and accurately, and the medicinal ingredients are evenly distributed throughout the gums and teeth. Can be applied effectively.

Here, examples of the silicone rubber include a millable type formed by plasticizing by a roll operation in the same manner as natural rubber and synthetic rubber, such as methyl vinyl silicone rubber, phenyl methyl silicone rubber, and fluoro silicone rubber. In addition, liquid silicone that is a low-viscosity liquid and is cured at room temperature or by heating to form a rubber shape, for example, condensation-type silicone, addition-type silicone, and the like. Examples of thermoplastic elastomers include styrene, vinyl chloride, olefin, urethane, polyester, nitrile, polyamide, fluorine, chlorinated polyethylene, chlorinated ethylene copolymer crosslinked alloy, ester halogen Examples thereof include a polymer system. Among these, methyl vinyl silicone rubber and styrene elastomer are preferable because they can provide flexibility and are resistant to chemicals and deterioration. Further, a plasticizer may be added to improve flexibility and the like.
Furthermore, it is preferable to set the hardness of the protruding hairs made of the low rebound resilience material to 15 N / cm ² or less because the splash of the liquid dentifrice can be further suppressed. Here, the hardness of the hair is measured according to a method (JIS S3016) using a compression tester in “Toothbrush” of Japanese Industrial Standard as described later.

The neck of the application brush of the present invention has a curvature that follows the side curvature of the child's teeth, and the length of the neck is preferably 30 to 70 mm and the radius of curvature R is preferably 10 to 500 mm.
Moreover, the brush part of the application brush of this invention is comprised thickly compared with length compared with a general toothpaste brush so that it may be easy to apply | coat. The following are illustrated as specific examples of the brush portion.
Brush portion width: 7 to 15 mm, brush portion length: 10 to 25 mm, arrangement area of protruding hairs: 1.0 to ^2.5 cm ² , number of protruding hairs: 20 to 150, protruding hair diameter: 0.5 ~ 2.0 mm, protrusion hair length: 2 to 12 mm, protrusion hair tip shape: arc shape, flat surface shape, conical shape, pyramid shape, wave shape. In addition, it can be installed on the entire surface with respect to the polyhedral form and the longitudinal direction of the neck.

  As described above, the brush of the present invention is used in either a palm grip or pen grip, but the protruding hair of the brush of the present invention is very soft compared to a general brush, so that the gums・ Rather than the action of brushing and rubbing against teeth, it is a liquid dentifrice application to the end, and it becomes a form of use that attaches a liquid dentifrice to the tooth surface. It will be removed. Thus, use for children is more suitable.

The application brush of this invention can be made into the removable type which shape | molds and assembles a brush part and a rod-shaped grip part separately. Specifically, it can be manufactured by molding the brush part with silicone rubber or the like, molding the rod-like grip part with resin such as polypropylene, and then fitting the brush part into the grip part.
In addition to this, the brush portion and the rod-shaped grip portion may be integrally formed and cannot be removed. Specifically, it can be manufactured by forming a polypropylene grip using a primary mold, setting the grip on a secondary mold, and pouring the elastomer resin around the mold.

Here, the liquid dentifrice suitable for using for the application brush of this invention is explained in full detail.
The liquid dentifrice of this invention consists of the following various components, and is prepared so that it may have a viscosity of 20-4000 mPa, preferably 50-1000 mPa under 20 ° C conditions.
The viscosity here is a measured value under a liquid temperature of 20 ° C., and can be measured, for example, with an RB80H viscometer (manufactured by Toki Sangyo Co., Ltd.).

Examples of the various components used include sodium fluoride, monofluorophosphoric acid, cetylpyridinium chloride, benzalkonium chloride, decalinium chloride, benzethonium chloride, isopropylmethylphenol, lysozyme chloride, dextranase, mutastein, dipotassium glycyrrhizinate, Active ingredients such as allantoin, allantoinchlorohydroxyaluminum, hinokitiol, tocophenol acetate, polyphosphate, pyrophosphate, solvents such as purified water, ethanol, glycerin, propylene glycol, butylene glycol, hydroxyethyl cellulose, polyvinyl pyrrolidone, polyethylene glycol, Thickeners such as xanthan gum, sodium hyaluronate, agar, carrageenan, sodium alginate, POE alkylate , POE hydrogenated castor oil, POE / POP copolymer, surfactants such as sodium lauryl sulfate, flavoring agents such as saccharin sodium, kylitol, erythritol, maltose, menthol and mint, preservatives such as sodium benzoate and paraben, citric acid PH adjusters such as sodium phosphate, various legal dyes, and fragrances.
Table 1 below shows Formulation Examples 1 to 4 of the liquid dentifrice of the present invention. (Displayed in mass%)

  According to the brush for applying a liquid dentifrice of the present invention, it is effective to apply a medicinal component to the gums and teeth by applying it quickly and accurately without damaging the gums and teeth while suppressing the occurrence of splashes of the liquid dentifrice. Can be applied evenly. In particular, since the protruding hairs are soft, it is suitable for parents to apply to children.

Hereinafter, embodiments of a liquid dentifrice application brush according to the present invention will be described in detail with reference to the drawings.
1 to 3 show an embodiment of a liquid dentifrice application brush according to the present invention, FIG. 1 is a perspective view of a liquid dentifrice application brush according to a first embodiment of the present invention, and FIG. The side view of a liquid dentifrice application brush and FIG. 3 are the partial expansion perspective views of the brush part of FIG.

  As shown in FIG. 1, the liquid dentifrice application brush 10 is connected to the brush part 12 having a plurality of protruding hairs 13a and 13b made of a low resilience elastic material on both front and back surfaces, and matched to the curvature of the tooth by connecting to the brush part 12. A neck portion 14 extending with a curvature (a chain line 14a in FIG. 2) and a rod-like grip portion 16 extending from the neck portion 14 are provided, and an intermediate circumferential convex portion 17 is disposed at a connection position with the neck portion 14, and the rod-like grip portion 16 is provided. A rear end circumferential convex portion 18 is disposed at the rear end. A rubber member portion 19 as an anti-slip is embedded in a striped pattern near the intermediate circumferential convex portion 17 of the rod-shaped grip portion 16.

The entire plurality of tips (virtual contact surfaces) of the front-side protruding hairs 13a of the brush portion 12 are concave curved surfaces, and the protruding hairs 13b on the back side have a planar shape. By these, which are surfaces that come into contact with the gums and teeth, a surface that can be more easily applied can be selected in accordance with the shape of the tooth during application of the liquid dentifrice.
The plurality of protruding hairs 13a and 13b of the brush portion 12 are formed by press molding or injection molding, and each tip may have a round shape such as a spherical shape or a planar shape.

The intermediate circumferential convex portion 17 and the rear end circumferential convex portion 18 provided in the rod-shaped grip portion 16 project over the entire circumference of the rod-shaped grip portion 16, but may be arranged so as to partially project. it can. Further, the rubber member portion 19 can be applied over the entire circumference.
The rear end circumferential projection 18 is stable for gripping mainly with a little finger, and the middle circumferential projection 17 is stable for gripping mainly with the thumb or index finger. Moreover, the grip portion can be held softly, and even when applied to its own teeth or applied by another person (parent applied to a child), the protruding hairs can be gently applied to the gums and teeth. Furthermore, since the neck 14 has a curvature that matches the curvature of the child's tooth side surface as shown by the dashed line 14a in FIG. 2, it is easier to move the application brush 10 in accordance with the curvature of the child's teeth. Become.

Next, an embodiment in which the brush portion of the application brush of the present invention is removable will be described with reference to FIGS.
4 is a perspective view of the liquid dentifrice application brush according to the second embodiment of the present invention with the brush portion removed, and FIGS. 5A and 5B are partially enlarged side views of the brush portion of FIG. is there.

  As shown in FIG. 4, the liquid dentifrice application brush 20 includes a brush portion 22 having a plurality of protruding hairs 23a and 23b made of a low resilience elastic material on both the front and back sides, the brush portion 12, the neck portion 14 and the rod shown in FIG. The brush part 22, the neck part 24, the rod-shaped grip part 26, the intermediate part circumferential convex part 27, and the rear having the same structure corresponding to the grip part 16, the intermediate part circumferential convex part 17, and the rear end circumferential convex part 18 End circumferential projections 28 are arranged. At the tip of the neck portion 24, there is provided a brush fixing portion 25 on which the brush portion 22 is detachably provided. Further, a rubber ring 29 is provided as a slip stopper near the intermediate circumferential convex portion 17 of the rod-shaped grip 16. This is shown in FIG. 4 as a partially enlarged cross-sectional view centering on the intermediate circumferential convex portion 17. The rod-shaped grip 16 is provided with a narrow detail 26a having a notch shape on the entire periphery near the intermediate circumferential convex portion 17, and a rubber ring 29 is embedded in the narrow detail 26a. As a result, any way of holding effectively acts as a slip stopper.

As shown in FIGS. 5 (a) and 5 (b), a fixing portion receiving gap 22a into which the brush fixing portion 25 is pushed is arranged in the brush portion 22, and the shoulder portion 25a is provided in the brush fixing portion 25. The brush portion 22 is fixed and maintained in a state in which the brush fixing portion 25 is pushed into the fixing portion receiving gap 22a up to the shoulder portion 25a and the brush fixing portion 25 is tightened by the elastic force of the brush portion 22 itself.
The other functions of the application brush 20 are the same as those of the application brush 10 shown in FIG.

6A and 6B are partially enlarged views showing other embodiments of the brush portion.
The brush portion 32 has the same function as the brush portion 12 shown in FIG. 2 or the brush portion 22 shown in FIG. 5, but as a whole, the plurality of tips of the front-side protruding bristles 33 a of the brush portion 32 as a whole. What is formed is a point formed by connecting two concave curved surfaces. The protruding hair 13b on the back side has a planar shape. Thereby, like the brush part 12 or the brush part 22, the surface which is easier to apply during application of the liquid dentifrice can be selected.

7A, 7B, and 7C are perspective views showing a modification of the second embodiment of the present invention.
At the tip of the neck portion 24, a brush fixing portion 251 to which the brush portion 22 is detachably provided is provided. FIG. 7B is a cross-sectional view taken along line MM of FIG. 7A. As can be seen from this figure, the brush fixing portion 251 is provided with a plurality of arrowhead-shaped shoulder portions 251a in the longitudinal direction. FIG. 7C is a perspective view showing a mounting state of the brush portion and the neck portion. As can be seen from this drawing, the entire shoulder portion 251a of the brush fixing portion 251 is pushed into the brush portion 22 and the inside of the brush portion 22 is inside. Due to the shape of the shoulder portion 251a formed on the surface and the elastic force of the brush portion 22 itself, the brush fixing portion 251 is tightened and caught, and the brush fixing portion 251 can be fixed and maintained more firmly inside the brush portion 22. .

[Example]
<Hardness test of protruding hair (according to JIS S3016)>
In JIS S3016, the length of the hair was cut to 7.00 ± 0.15 mm, and the length of the protruding hair of the silicone of Examples 1 and 2 was measured as 3.0 mm. In Comparative Examples 1 and 2, the sample was not processed, and the measurement was performed using the described hair length.
The protruding hair sample was fixed with a push-pull gauge, a load was applied at a speed of 10 mm / min, the maximum value of the load was obtained, and the hardness of the hair was calculated by the following formula.
H = P / B
Here, H: (N / cm ² ), P: maximum value of load (N), B: flocked area (cm ² )
1Kgf = 9.80665N.

(sample)
Example 1. 1. Application brush embodiment of the present invention as shown in FIG. 1 having a brush portion made of silicone having a hardness of 40 ° Comparative Example 1 of the application brush of the present invention shown in FIG. 1 having a brush portion made of silicone having a hardness of 55 °. Commercially available nylon toothbrush (GUM dental brush # 76 (trade name) [manufactured by Sunstar Co., Ltd.], hair length: 6.0 mm,)
(Results and discussion)
The measurement results are shown in Table 2.
The application brush of the present invention was about 7 to 13 times as soft as a commercially available soft toothbrush.

(Scattering test)
FIG. 8 is a conceptual diagram showing an outline of the liquid agent scattering test. As shown in FIG. 8, 300 μL of the liquid agent was applied to the brush, and the subject brushed the denture (mandible) placed on the white vat freely for 30 seconds. After the brushing, the number of droplets (size that can be observed with the naked eye) flying into a 5 cm square area indicated by the ranges X, Y, and Z in FIG. 8 was measured.
・ Liquid used: Formulation Example 1 with 0.1% of Red No. 102 added
Example 3: Application brush of the present invention (Example 2) (Table 3-2)
Comparative Example 2: Commercially available nylon toothbrush [check ultra compact (trade name) (manufactured by Kao Corporation, hair length: 9.0 mm, maximum load: 36.3 N, flocking area: 1.4 cm ² , hair Hardness: 25.9 N / cm ² )] (results are Table 3-1)

(Results and discussion)
The test was conducted by 5 subjects. Comparative Example 2 using a commercially available toothbrush is shown in Table 3-1, and Example 3 using the application brush of the present invention is shown in Table 3-2.
The toothbrush used in Comparative Example 2 has a long bristle length of 9.0 mm and a low bristle hardness. However, as a whole, the application brush of the present invention is better than the toothbrush of Comparative Example 2. There was a clear tendency to scatter. From the results of Comparative Example 2, the application brush of the present invention showed almost no scattering even in subjects A and C, which were presumed to have a strong brushing pressure from the number of droplets.

  In addition, the liquid dentifrice application brush which concerns on this invention is not limited to each embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably.

It is a perspective view of the liquid dentifrice application brush which concerns on 1st Embodiment of this invention. It is a side view of the liquid dentifrice application brush of FIG. It is a partial expansion perspective view of the brush part of FIG. It is a perspective view of the state where the brush part of the liquid dentifrice application brush concerning a 2nd embodiment of the present invention was removed. (A), (b) is a partial expanded side view of the brush part of FIG. 4, respectively. (A) is a partial expansion perspective view which shows other embodiment of a brush part, (b) is the partial expansion side view of the brush part of (a). It is a perspective view which shows the modification of 2nd Embodiment of this invention. It is a conceptual diagram which shows the outline | summary of a scattering test.

Explanation of symbols

10, 20, 30 Liquid dentifrice application brush 12 Application brush part 13a, 13b Protruding hair 14 Neck part 16 Grasping part 17 Middle part circumferential convex part 18 Rear end circumferential convex part 25 Brush fixing part

Claims (1)

A liquid dentifrice application brush having a brush portion for applying a liquid dentifrice having a plurality of protruding hairs made of a low rebound resilience material on both front and back surfaces, multiple surfaces or the entire circumferential surface ,
The virtual contact surface of the plurality of protruding hair tip portions has at least one concave curved surface portion,
The protrusion hair has a hardness of 15 N / cm ² or less,
In the liquid dentifrice application brush in which the low-rebound resilience material is made of silicone rubber or thermoplastic elastomer,
A rod-shaped grip portion having a rear end circumferential convex portion and an intermediate portion circumferential convex portion, and a neck portion extending from the intermediate circumferential convex portion of the grip portion to the brush portion with a curvature adapted to the side curvature of the child's teeth And a liquid dentifrice-applying brush.

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