KR20220125940A - Toothbrush - Google Patents

Abstract

The present invention relates to a toothbrush, in which an upper surface of a head of a toothbrush holder is formed as a bristle-transplanting surface for planting bristles and as a curved surface that curves more upward toward a front thereof. In order to improve the cleaning effect, users can brush their teeth in a state where the bristles are uniformly and naturally in close contact with the outside of the teeth arranged in a curved shape. In addition, since bristle planting holes on the bristle planting surface are formed in a larger shape on the left and right than front and back of the bristle planting surface, an enlarged cleaning area can be provided in the head width direction when brushing teeth by rubbing the teeth left and right to improve the cleaning effect. When rubbing the teeth up and down, deep interdental penetration is possible as well.

Description

toothbrush {TOOTHBRUSH}

An embodiment of the present invention relates to a toothbrush used for brushing teeth.

The toothbrush uses a metal anchor, also called a flat wire, according to a method of implanting bristles on a toothbrush head (see Patent Document 1 below), and anchorless using a head insert instead of an anchor It can be divided into (anchorless) form (see Patent Document 2 below). These toothbrushes, in common, a toothbrush head having a constant front and back length includes a head, and the head is configured to provide a bristle surface in which bristle holes are formed, and bristles are implanted in a bundle state in each of the bristle holes.

In recent years, as the average lifespan of humans is extended, the preservation of natural teeth becomes important, and toothbrushes with improved cleaning power have been developed and used, but the cleaning effect of these toothbrushes on interdental and molar teeth is still insufficient. In this case, dental diseases are still a common occurrence.

Republic of Korea Patent Publication No. 10-0925228 (2009.11.06) Republic of Korea Patent Publication No. 10-2012-0056311 (2012.06.04) Republic of Korea Patent Publication No. 10-0666455 (2007.01.09) Republic of Korea Patent Publication No. 10-2020-0110546 (2020.09.24)

According to the research and tests by the present inventors, the reason is that the adhesion of the bristles to the teeth arranged in a curved shape is low, the cleaning area of the bristles is small when brushing the teeth by rubbing the teeth from side to side, the teeth The deep interdental penetration and elasticity of the bristles are insufficient when brushing by rubbing them up and down (it may be a sweeping up and down method). problems, etc.

For example, Korean Patent No. 10-0666455 discloses that the hair transplantation surface constituting the upper surface of the head is formed as a flat surface, and the front and rear (vertical) sizes of the hair transplant holes arranged on the hair transplantation surface are left and right (horizontal) in size. Compared to that, a large toothbrush is presented. In the case of this toothbrush, since the bristle surface is flat, it is difficult to uniformly and naturally adhere the bristles to the outside of the curved teeth, and the bristles are introduced into the relatively narrow area outside the molars in the oral cavity. It is also difficult to reach the molars at the tip of the deer. In addition, since the front and rear sizes (2.5 to 4.0 mm) of the bristle holes are larger than the left and right sizes (1.5 to 2.5 mm), the cleaning area by the bristles when brushing teeth by moving the toothbrush back and forth and rubbing the teeth from side to side It is bound to be reduced as much as the left and right spacing of the hair transplant holes. Furthermore, according to the shape in which the front-to-back size of the bristle holes is larger than the left-right size, the number of bristles arranged in the front-rear direction in each of the hair bundles is larger, whereby the bristles have greater elasticity in the front-rear direction than in the left-right direction. It is difficult to reliably penetrate the bristles between teeth when brushing teeth by rubbing them from side to side, and it is difficult to expect a further improved cleaning power when brushing teeth by moving or rotating the toothbrush left and right.

As another example, Korean Patent Laid-Open Publication No. 10-2020-0110546 discloses a toothbrush in which a neck between a handle and a head is formed in a downwardly inclined shape with respect to the handle. Since this toothbrush also has a flat bristle surface, there is a limit to uniformly and naturally adhering the bristles to the outside of the teeth as a whole, and it is difficult to reach the bristles to the molars located in the tip region of the teeth. In particular, in the case of this toothbrush, since the neck is inclined backward, it is difficult to completely transmit the force applied to the handle by the user to the head when brushing teeth by rubbing the teeth from side to side.

(Problem to be solved)

An embodiment of the present invention is to provide a toothbrush capable of improving the adhesion of bristles to the outside of the teeth when brushing by rubbing the teeth from side to side.

The embodiment of the present invention can ensure an enlarged cleaning area to the left and right of the head when brushing by rubbing the teeth from side to side, and by rubbing the teeth up and down, improved elasticity and relatively improved elasticity before and after the head An object of the present invention is to provide a toothbrush that can expect improved cleaning efficiency and deep interdental penetration through bristles that provide a thin bundle.

SUMMARY OF THE INVENTION An embodiment of the present invention is to provide a toothbrush that can more efficiently transmit the force applied to the handle by the user to the head when brushing teeth.

Problems to be solved are not limited thereto, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

The present inventors have proposed a method of rubbing the teeth from side to side by moving the toothbrush back and forth along the length of the head among various brushing methods and a method of moving the toothbrush from side to side along the width of the head to rub the teeth up and down (sweep the lower teeth and sweep the upper teeth down) ) is the easiest and most commonly used, however, attention was paid to the fact that cleaning power tends to be insufficient when using conventional toothbrushes when brushing with these two methods.

According to the present inventor's research and tests related to this, in terms of improving the cleaning effect, the shape of the bristle surface is closely related to the curved dentition, and if it has a curved surface similar to the dentition, the adhesion of the bristles to the teeth is greatly increased. The result was obtained that the angle acts as a more important factor than the curvature of the curved surface. In addition, the shape of the bristle holes, which is one of the factors determining the elasticity of the bristles, is more advantageous in terms of improving the cleaning effect when the size of the left and right (head width direction) is larger. It has been found that the force applied when brushing can be transmitted to the head more efficiently.

(Means of solving the task)

According to an embodiment of the present invention, a toothbrush body and a toothbrush head having a head extending forward from the front end of the body; Including hair bundles each implanted in the hair transplantation holes of the head, the upper surface of the head is formed with a hair transplantation surface on which the hair transplantation holes are disposed, the hair transplantation surface is formed to have a curved surface of a shape that curves upward toward the front , a toothbrush may be provided.

The curved surface may be formed such that a virtual straight line connecting the front end and the rear end forms an angle of 3 to 15 degrees with respect to the horizontal.

All of the hair implantation holes may be a wide hole in which the left and right sizes are formed in a larger shape than the front and rear sizes so that the hair bundles implanted in each have greater elasticity in the left and right directions compared to the front and rear directions.

The size of the left and right (refer to the width direction of the head) of the hair implantation holes may be 2.0 to 5.0 mm. And, the size of the front and rear (refer to the longitudinal direction of the head) of the implantation holes may be 0.8 to 2.5 mm.

The upper surface of the toothbrush head body may be formed in a horizontal plane with at least half (1/2) or more sections rearward from the front end connected to the upper surface of the head.

At least any one or more of the hair implantation holes may be implanted in a rearward inclined state by being inclined at a certain angle to the rear of the hair bundles.

The head may be formed to have a constant top and bottom thickness.

According to an embodiment of the present invention, a toothbrush body and a toothbrush head having a head extending forward from the front end of the body; Including hair bundles each implanted in the hair transplantation holes of the head, the upper surface of the head is formed with a hair transplantation surface on which the hair transplantation holes are disposed, the hair transplantation surface, a front curved surface arranged in a relatively front and rearward, respectively, and Doedoe having a rear curved surface, the front curved surface is formed in a shape that curves upward toward the front, the rear curved surface is formed in a shape that is curved upward toward the rear, the toothbrush can be provided.

Here, the front curved surface may be formed such that a front virtual straight line connecting the front end and the rear end forms an angle of 3 to 15 degrees with respect to the horizontal. In addition, the rear curved surface may be formed such that a rear virtual straight line connecting the front end and the rear end forms an angle of 3 to 10 degrees with respect to the horizontal.

According to an embodiment of the present invention, a toothbrush body and a toothbrush head having a head extending forward from the front end of the body; Includes hair bundles each implanted in the hair implantation holes of the head, and the upper surface of the toothbrush body is formed in a horizontal plane with at least 1/2 or more sections rearward from the front end connected to the upper surface of the head, The upper surface is formed as a surface for implantation in which the implantation holes are arranged, and the surface for implantation is formed as a curved surface of a shape that curves upward toward the front, and all of the implantation holes are left and right compared to the front and rear directions of the hair bundles implanted in each. In order to have greater elasticity in the direction, the toothbrush can be provided, which is a wide hole formed in a shape large in size on the left and right compared to the size before and after.

Means of solving the problem will be more specific and clear through the examples, drawings, etc. described below. In addition, various solutions other than the solutions mentioned below may be additionally suggested.

(Effects of the Invention)

According to an embodiment of the present invention, the hair implantation surface on which the bristles are implanted is formed to have a curved surface of a shape that is curved upward toward the front (head tip side), and has a shape corresponding to or similar to the outside of the curved tooth. The hair transplantation surface may further have a curved surface of a shape that is curved upward toward the rear. Accordingly, when brushing the teeth by moving the toothbrush back and forth along the length of the head and rubbing the teeth from side to side, the bristles are moved smoothly along the outside of the curvedly arranged teeth, and during this process, the bristles are uniformly on the outside of the teeth. Since it adheres naturally, the surface cleaning effect can be improved more. In addition, when brushing teeth by moving the toothbrush back and forth along the length of the head and rubbing the teeth from side to side, the head easily enters the relatively narrow area outside the molars in the oral cavity, and furthermore, the bristles reach deep to the molars at the tip. , it is possible to clean the outside of the molars without effort, and even the rear of the molars at the end can be cleaned simply by the bristles at the front end.

According to an embodiment of the present invention, the angle of the curved surface constituting the hair transplantation surface may be 3 to 15 degrees. That is, the virtual straight line connecting the front end and the rear end of the curved surface may be formed to form 3 to 15 degrees with respect to the horizontal. According to the angle of the curved surface, the adhesion of the bristles to the outside of the teeth, the entry of the head into the area outside the molars in the oral cavity, the reach of the bristles to the molars at the tip, and the operability of the head in the oral cavity are optimized. can do.

According to an embodiment of the present invention, the hair transplantation holes provided on the hair transplantation surface are formed in a larger shape than the left and right (refer to the width direction of the head) size compared to the front and rear (refer to the length direction of the head) size. According to this, since the left and right of the tufting holes are wide, and the total left and right spacing between the tufting holes is reduced as the left and right are widened in this way, when brushing the teeth by moving the toothbrush back and forth along the head length, It provides a larger cleaning area in the head width direction. In addition, according to the shape (wide and slim horizontal hole) in which the left and right sides of the hair transplant holes are wide and the front and rear are relatively narrow (wide and slim horizontal hole), the hair bundles also have a shape that the left and right sides are wide and the front and the back are relatively narrow, and the bristles arranged left and right in each hair bundle Since the number is greater than the number of bristles arranged back and forth, the bristles have relatively strong elasticity (cleaning power) in the left-right direction and relatively weak (soft) elasticity in the front-back direction.

Here, according to the fact that the bristles are wide left and right and the bristles have soft elasticity in the front and rear directions, the tooth surface can be thoroughly and gently cleaned when brushing the teeth by moving the toothbrush back and forth along the length of the head and rubbing the teeth from side to side. have.

And, according to the fact that the front and back of the hair bundles are narrow, and the bristles have strong elasticity in the left and right directions, brushing the teeth by moving the toothbrush left and right along the head width to rub the teeth up and down (it may be a sweeping up and down method) When used, it is possible to provide deep interdental penetration, thereby greatly improving interdental cleaning efficiency.

According to an embodiment of the present invention, the tuft holes may have a left and right size of 2.0 to 5.0 mm and a front and rear size of 0.8 to 2.5 mm. According to the size of the bristle holes, it is possible to optimize the cleaning area of the bristles, the elasticity of the bristles in the left-right direction and the front-rear direction in order to improve the cleaning effect.

According to an embodiment of the present invention, the upper surface of the toothbrush head body is formed in a horizontal plane with at least half of the section rearward from the tip connected to the hair implantation surface. Accordingly, the cleaning effect can be improved by completely transferring the force applied by the user to the head, particularly when brushing teeth by rubbing the teeth from side to side.

According to an embodiment of the present invention, the hair implantation holes are formed to be inclined to the rear, the bristles are implanted in a state inclined to the rear. Accordingly, it is possible to provide a more improved cleaning effect in a relatively easy pulling process when pushing and pulling the toothbrush stem to move the head back and forth for the purpose of cleaning teeth or tongue.

Effects of the present invention are not limited thereto, and other effects not mentioned will be clearly understood by those skilled in the art from this specification and the accompanying drawings.

In order to more fully understand the drawings cited herein, a brief description of each drawing is provided.
1 is a perspective view showing a toothbrush according to a first embodiment of the present invention.
Figure 2 is a perspective view showing a toothbrush head of the toothbrush shown in Figure 1;
Fig. 3 is a side view showing the toothbrush head of the toothbrush shown in Fig. 1;
FIG. 4 is a cross-sectional perspective view of the toothbrush head shown in FIG. 2 ;
FIG. 5 is a cross-sectional view showing the head of the toothbrush head shown in FIG. 2 .
Fig. 6 is a plan view showing the head of the toothbrush head shown in Fig. 2;
7 is a front view showing the bristles of the toothbrush shown in FIG. 1 .
8 is a cross-sectional view showing the main part of the toothbrush according to the second embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, the embodiments of the present invention will be described in detail so that those of ordinary skill in the art can easily implement them. However, the present invention may be embodied in various other forms and is not limited to the embodiments described herein.

In describing an embodiment of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the specific description is omitted, and parts with similar functions and actions are omitted. The same reference numerals are used throughout the drawings.

At least some of the terms used in the specification are defined in consideration of functions in the present invention, and thus may vary according to user, operator intention, custom, and the like. Therefore, the terms should be interpreted based on the content throughout the specification. In addition, in the specification, when a certain component is included, this means that other components may be further included, rather than excluding other components, unless otherwise stated. And, when it is said that a part is connected (or coupled) with another part, it is not only directly connected (or coupled), but also indirectly connected (or coupled) with another part therebetween. include

On the other hand, in the drawings, the size or shape of the component, the thickness of the line, etc. may be expressed somewhat exaggerated for the convenience of understanding.

Although the present invention may be a toothbrush using an anchor or a toothbrush that does not use an anchor in order to implant bristles on a toothbrush head, an embodiment of the present invention will focus on the case of a toothbrush including an anchor.

A toothbrush according to a first embodiment of the present invention is shown in FIGS. 1 to 7 .

A first embodiment of the present invention is a toothbrush using an anchor, also called a flat line, to implant bristles on the head of a toothbrush head, and fold the middle part of the bristle bundle composed of bristles (see FIG. 7 ), and between the folded bristle bundles By placing an anchor in the tuft and then forcibly inserting it into the tuft hole of the head, the hair bundles can be implanted in the tuft holes, respectively. For reference, the middle part folded for hair transplantation in the hair bundle may be a central position and a position slightly biased to either side from the central position. When the bristle bundle is folded based on the central position of the bristle bundle, it is possible to provide a toothbrush in which both heights of the bristles are substantially the same based on the folded position (the central position). When the bristle bundle is folded based on a position slightly biased to one side from the center of the bristle bundle, a toothbrush having different heights of the bristles based on the folded position can be provided.

Referring to FIG. 1 , the toothbrush according to the first embodiment of the present invention includes a toothbrush head 10 and a plurality of hair bundles 20 , and the hair bundles 20 are implanted in the toothbrush head 10 to the toothbrush head 10 . ) holds the hair bundles 20 .

The toothbrush rest 10 is formed to have a predetermined length and thickness in consideration of usability. Referring to FIGS. 1 to 3 , the toothbrush head 10 is extended in the front-rear direction and the toothbrush body 11 and 12 having a constant length, and the head 13 extending forward from the front end of the toothbrush body 11 and 12 . ) is included. The toothbrush body (11, 12) includes a handle (11) and a neck (12), the handle (11) is disposed at the rear of the neck (12). Then, the neck 12 extends forward from the handle 11 , and connects the handle 11 and the head 13 between the handle 11 and the head 13 . The handle 11 and the neck 12 may be integrally formed.

The toothbrush body parts 11 and 12 and the head 13 may be made of resin. The material of the toothbrush body 11 and 12 and the head 13 is acrylonitrile butadiene styrene (ABS), acrylonitrile styrene (AS), polypropylene (PP), polyethylene tere. It may be polyethylene terephtalate (PET) or the like. The toothbrush body 11 and 12 and the head 13 may be integrally made of the same material. Depending on the operating conditions and the like, the toothbrush body 11 and 12 and the head 13 may be made of a natural material or may be made of a resin containing a natural component.

The bristles 25 of each of the bristle bundles 20 may be made of nylon, polybutylene-terephthalate (PBT), or the like. Depending on the implementation conditions and the like, the bristles 25 may be made of a natural material or may be made of a resin containing a naturally derived component.

7, at least any one or more of the bristles 25 may be fine bristles (tapered bristle) in which a tapered portion 26 of a shape that is gradually reduced toward the end is formed at one or both ends. . The fine hairs can penetrate the tip of the interdental and the like more deeply. Accordingly, if fine bristles are applied as the bristles 25, it is more advantageous in terms of tartar or plaque removal, and it is possible to more effectively clean the interdental space.

The thickness (diameter, D) of the bristles 25 may be 0.08 to 0.20 mm. The taper length (length of the tapered portion 26 ) TL of the fine bristles applied as bristles 25 may be between 3 and 10 mm. If the thickness of the bristles 25 is less than 0.08 mm and the taper length TL exceeds 10 mm, the elasticity of the bristles 25 is weak, making it difficult to ensure improved cleaning power. In addition, when the thickness of the bristles 25 exceeds 0.20 mm and the taper length TL is less than 3 mm, excessive cleaning power is generated from the bristles 25, so that the degree of abrasion of teeth during brushing is large and the degree of irritation of the gums is high. can be severe

For reference, each of the hair bundles 20 has a thickness (D) of 0.08 to 0.20 mm and a taper length (TL) of 3 to 10 mm. have.

Referring to Figures 2 to 4, the head 13, the upper surface is formed of a hair-transplantation surface 15, the hair-transplantation holes 16 are provided in the hair-transplantation surface 15 has a hair-transplantation hole (16). The inlet of the hair implantation hole 16 of the head 13 is arranged on the hair implantation surface 15, and the hair bundle 20 is implanted in each of the hair implantation holes 16.

As shown in FIG. 5 , the hair transplantation surface 15 has a curved surface 15A. The curved surface 15A is formed in a shape that is curved upward toward the front so as to have a shape corresponding to or similar to the outer side of the curved tooth structure. In addition, the curved surface 15A is formed to have an angle in a range in which the head 13 can easily enter into a relatively cramped area outside the molars in the oral cavity and easily reach the molars at the end.

Such a curved surface (15A), starts from the rear end of the hair transplantation surface 15, and curves upward toward the front and ends at the front end of the hair transplantation surface 15, so that it is formed over the entire surface of the hair transplantation surface 15. Depending on the implementation conditions and the like, the curved surface 15A may be formed only on a part of the hair transplantation surface 15 .

Considering that the bristles 25 protrude at a constant height from the bristle surface 15 and have a certain elasticity, the bristles 25 are uniformly and naturally attached to the outside of the teeth arranged in a curved shape as a whole, as well as the head ( 13) in the oral cavity, the angle of the curved surface 15A may act as a more important factor than the curvature of the curved surface 15A to easily enter the cramped outer molar area. Accordingly, the curved surface 15A is formed to have an angle of 3 to 15. Specifically, the curved surface 15A is formed such that an imaginary straight line L1 connecting the front end and the rear end forms an angle of 3 to 15 degrees with respect to the horizontal.

If the angle A1 of the curved surface 15A is less than 3 degrees, the curved surface 15A has a large difference in shape from the outside of the curved dentition. Since it is difficult to adhere to the outside of the teeth uniformly and naturally, an improved cleaning effect cannot be expected. Conversely, when the angle A1 of the curved surface 15A exceeds 15 degrees, in the process of moving the head 13 along the teeth to brush teeth in a manner that rubs the teeth from side to side, the tip of the head 13 is attached to the teeth. can bump

Meanwhile, the curved surface 15A may be formed of a plurality of unit curved surfaces connected to each other at the front and rear. In addition, some of the unit curved surfaces may have different angles and/or curvatures from others in a range where the angle A1 of the curved surface 15A is 3 to 15 degrees.

Depending on the implementation conditions, etc., in order to easily manipulate the head 13 in the oral cavity, such as entering the relatively narrow area outside the molars, the upper and lower thickness HT of the head 13 may be formed to be constant. For example, the top and bottom thickness HT of the head 13 may be 2.0 to 5.0 mm. In terms of increasing the operability of the head 13 in the oral cavity, it may be advantageous as the thickness HT of the head 13 is thinner. However, if the thickness HT of the head 13 is less than 2.0 mm, the strength of the head 13 may become insufficient, and the depth of the hair implantation holes 16 cannot be sufficiently secured, so that the bristles 25 are stably implanted. It can be difficult to do. When the thickness HT of the head 13 exceeds 5.0 mm, the operability of the intraoral head 13 will fall easily.

5 and 6 , the head 13 may have a front and rear length HL of 16 to 40 mm when viewed from above, and a left and right width HW of 5 to 13 mm. When the head 13 is less than 16 mm in length (HL) and less than 5 mm in width (HW), the number of bristles 25 that can be implanted is too small, so that the cleaning effect during brushing is likely to decrease. Conversely, when the head 13 exceeds the length HL of 40 mm and the width HW exceeds 13 mm, the operability of the head 13 in the oral cavity tends to decrease.

The hair implantation holes 16 can impart greater elasticity to the hair bundles 20 in the left-right direction (refer to the width direction of the head 13) compared to the front-back direction (refer to the longitudinal direction of the head 13), In addition, the hair bundles 20 are formed in a shape that can provide an enlarged cleaning area in the width direction of the head 13 when brushing teeth by moving the head 13 back and forth to rub the teeth from side to side. That is, the tuft holes 16 are formed in a wide shape having a left and right size (H1) larger than the front and rear size (H2). As in (a) of Figure 6, the hair implantation hole 16 may be a curved shape connecting the front and back of the straight line side by side with each other, the left and right are straight. Alternatively, as in (b) of Figure 6, the tuft holes 16 may be in a rectangular shape. Alternatively, as in (c) of Figure 6, the hair implantation hole 16 may be a shape in which the four corners are rounded in a rectangular shape. Alternatively, although not shown, the tuft holes 16 may be in the shape of an oval (ie, an ellipse having left and right as a major axis and front and rear as a minor axis) having a left and right length compared to the front and rear length. As the hair implantation holes 16, any one or more of the shape and the aforementioned oval in (a), (b), (c) of FIG. 6 may be applied.

Since the bristle hole 16 has a left and right size (length, H1) larger than the front and rear size (length, H2), the bristles 25 are arranged in a larger number in the left and right direction in each tuft hole 16 . In this way, since the number of bristles 25 arranged in the left and right directions in each of the bristle holes 16 increases, the bristles 25 have relatively strong elasticity in the left and right directions and relatively soft elasticity in the front and rear directions. have

According to such bristle holes 16, when brushing teeth by moving the head 13 back and forth and rubbing the teeth from side to side, cleaning by the cleaning area of the bristles 25 enlarged in the width direction of the head 13 Efficiency is further improved, and in the front-rear direction of the head 13 , a cleaning power without significant irritation is provided by the elasticity of the relatively soft bristles 25 . In addition, when brushing the teeth by moving the head 13 up and down (moving or rotating) up and down (it may be a sweeping up and down method), the front and rear of the hair bundle 20 are narrow and the head 13 In the left and right direction of the bristles 25, the bristles 25 are penetrated more deeply between the teeth by the elasticity of the relatively strong bristles 25, thereby providing an improved interdental cleaning effect.

The tuft holes 16 may have a left and right size (length, H1) of 2.0 to 5.0 mm and a front and rear size (length, H2) of 0.8 to 2.5 mm. When the bristle holes 16 are formed with a left-right size (H1) less than 2.0 mm and an anterior-posterior size (H2) less than 0.8 mm, the elasticity provided by the bristles 25 in the left-right direction and the front-to-back direction is too weakened, so that cleaning power, interdental penetration, etc. The resulting cleaning effect tends to decrease. Conversely, if the left and right sizes (H1) and front and rear sizes (H2) of the bristle holes 16 exceed 5.0 mm and 2.5 mm, respectively, the elasticity provided by the bristles 25 in the left and right directions and front and back directions becomes excessive, so when brushing teeth In this case, the degree of wear of the teeth is large and the degree of irritation of the gums may be severe.

The spacing between the bristle holes 16 may be 0.5 mm to 1.2 mm in consideration of the cleaning area in the width direction by the bristles 25 and the like.

On the other hand, the implantation holes 16, since the implantation surface 15 has a curved surface 15A, the depth of the front portion (d2) and the rear portion (d1) may be different from each other, but each other when based on the central portion It may be formed to have the same depth.

Referring to Figure 5, at least any one or more of the implantation holes 16 is formed in a shape inclined to the rear (toward the toothbrush body 11, 12), and implanted in the implantation hole 16 of the shape inclined to the rear In the case of the hair bundle 20 that is to be provided in a backward inclined state. According to this, when pushing and pulling the toothbrush stem 10 to move the head 13 back and forth for the purpose of cleaning teeth or tongue, the bristles 25 inclined backward in a relatively easy pulling process provide a further improved cleaning effect. to provide. In particular, when brushing by rubbing the outside of the molars from side to side, it is possible to provide an excellent cleaning effect even on the back side of the molars at the end.

The angle (a) at which the hair implantation hole 16 is inclined backward may be 4 to 20 degrees with respect to the horizontal. If the inclination of the tuft hole 16 is less than 4 degrees, the cleaning effect improvement by the inclination may be insignificant. When the inclination of the hair implantation hole 16 exceeds 20 degrees, the interdental penetration force of the bristles 25 may be reduced when brushing teeth.

Referring to FIGS. 3 and 5 , the toothbrush body 11 and 12 transmits the force applied while the user grips the handle 11 to the head 13 as completely as possible to increase the cleaning effect. In order to prevent the brushing process from becoming difficult because a lot of force is required for brushing, the upper surface 14 including at least a portion of the upper surface of the handle 11 and the entire upper surface of the neck 12 is formed to be flat. That is, the toothbrush body (11, 12) is formed so that the upper surface 14 has a horizontal plane. Specifically, in the toothbrush body (11, 12), the upper surface 14 is formed in a horizontal plane at least half (1/2) or more sections backward from the front end connected to the hair implantation surface 15, which is the upper surface of the head 13. can be The straight section formed in a horizontal plane on the upper surfaces 14 of the toothbrush body parts 11 and 12 increases the transmission power for the force applied by the user when brushing, so that the cleaning effect by brushing can be improved, and in the process of brushing Relatively much force can be prevented.

The present inventors manufactured various toothbrushes as follows in order to test the superiority of the toothbrush according to the first embodiment of the present invention.

(Comparative Example 1) The upper surface of the toothbrush head body is formed in a horizontal plane, the length, width and thickness of the head are 32.8 mm, 12 mm and 4.46 mm, respectively, the hair implantation surface is formed flat, diameter 0.18 mm and depth 3.5 A toothbrush in which round bristle holes of mm are formed at intervals of 0.8 mm on the bristle surface, and bristles having a total length of 30 mm, a thickness of 0.17 mm, and a taper length of 7 mm on both sides are implanted in the bristle holes by anchors.

(Example 1) The upper surface 14 of the toothbrush head body is formed in a horizontal plane, and the length (HL), width (HW) and thickness (HT) of the head are 32.8 mm, 12 mm and 4.46 mm, respectively, and the hair transplantation surface It is formed with a curved surface 15A that curves upward toward the front, the curved surface angle A1 is 2 degrees, the left-right size (H1) 1.8 mm, the front-to-back size (H2) 0.7 mm, and a depth of 3.37 to 3.58 mm. The form is, as shown in Fig. 6 (a), a straight line in which the front and back sides are parallel to each other and a curved shape connecting the front and rear sides of the straight line) are formed at an interval of 0.8 mm on the hair implantation surface, the total length is 30 mm, and the thickness (D ) Toothbrush having bristles of 0.17 mm and each taper length (TL) of 7 mm are implanted in the bristle holes by anchors

(Example 2) Other configurations are the same as those of Example 1, the toothbrush differs only in that the bristle holes are 2.9 mm left and right and 1.3 mm front and back.

(Example 3) Other configuration is the same as that of Example 1, the curved surface angle is 3 degrees, the toothbrush holes are different only in the left and right sizes of 2.9 mm and the front and rear sizes of 1.3 mm.

(Example 4) Other configurations are the same as those of Example 1, except that the curved surface angle is 10.5 degrees and the bristle holes are 2.9 mm left and right and 1.3 mm front and back.

(Example 5) The other configuration is the same as that of Example 1, a toothbrush with a curved surface angle of 12 degrees, only that the bristle holes are 2.9 mm in left and right sizes and 1.3 mm in front and back sizes.

(Example 6) The other configuration is the same as that of Example 1, the curved surface angle is 15 degrees, and the toothbrush holes are different only in the left and right sizes of 2.9 mm and the front and rear sizes of 1.3 mm.

(Example 7) Other configurations are the same as those of Example 1, the curved surface angle is 3 degrees, the toothbrush holes are different only in the left and right sizes of 4 mm and the front and rear sizes of 1.5 mm

(Example 8) Other configurations are the same as those of Example 1, except that the curved surface angle is 10.5 degrees and the bristle holes are 4 mm left and right and 1.5 mm front and back.

(Example 9) The other configuration is the same as that of Example 1, the curved surface angle is 15 degrees, the toothbrush is different only in that the bristle holes are 4 mm in left and right sizes and 1.5 mm in front and back sizes.

(Example 10) Other configuration is the same as that of Example 1, the curved surface angle is 16 degrees, the toothbrush is different only in that the bristle holes are 5 mm in left and right sizes and 1.5 mm in front and back sizes.

(Example 11) Other configurations are the same as those of Example 1, except that the curved surface angle is 10.5 degrees and the bristle holes are 5.5 mm in left and right sizes and 1.5 mm in front and back sizes.

After having 200 adults (100 males and 100 females) use the toothbrushes according to this comparative example and the toothbrushes according to Examples 1 to 11 for 2 weeks, satisfaction was investigated. the results are as follow.

division interdental cleaning molar
tooth cleaning molar
perimeter cleaning tongue cleaning Sum comparative example 3.7 3.8 3.4 2.9 13.8 Example 1 4.8 2.4 2.9 1.8 11.9 Example 2 4.9 4.7 3.6 4.6 17.8 Example 3 4.9 4.9 4.3 4.6 18.7 Example 4 4.8 4.9 4.8 4.7 19.2 Example 5 4.7 4.7 4.7 4.5 18.6 Example 6 4.5 4.6 4.6 4.2 17.9 Example 7 4.2 4.9 4.3 4.8 18.2 Example 8 4.1 4.9 4.4 4.9 18.3 Example 9 3.9 4.6 4.2 4.3 17.0 Example 10 2.4 4.1 3.5 3.9 13.9 Example 11 3.5 4.7 4.1 4.9 17.2

[Evaluation method] Very satisfied 5, satisfied 4, average 3, dissatisfied 2, very dissatisfied 1

According to the satisfaction survey results for Example 4, the toothbrush with a curved surface angle of 10.5 degrees and bristle holes of 2.9 mm left and right and 1.3 mm front and back was the most satisfactory in terms of cleaning effect on interdental, molar tooth surface, molar circumference and tongue. confirmed to be On the other hand, according to the satisfaction survey result for Example 1, the toothbrush having a curved surface angle (A1) of 2 degrees and bristle holes of 1.8 mm left and right and 0.7 mm front and back was the most unsatisfactory, and the cleaning effect was also the toothbrush according to the comparative example was found to be lower. In particular, it was confirmed that the size of the front and rear of the bristle holes was too small as 0.7 mm as a factor significantly reducing the elasticity of the bristles and thus the cleaning power.

According to the satisfaction survey results for Example 2, the toothbrush having a curved surface angle of 2 degrees and bristle holes of 2.9 mm left and right and 1.3 mm before and after was found to be satisfactory in terms of cleaning effect on the interdental, molar tooth surface and tongue. , it was confirmed that the curved surface angle was as small as 2 degrees for the circumference of the molars, so that it was not possible to exert a meaningful cleaning effect.

According to the satisfaction survey results for Example 10, it was confirmed that the toothbrush having a curved surface angle of 16 degrees and bristle holes of 5 mm left and right and 1.5 mm front and back was unsatisfactory in terms of interdental cleaning effect. In particular, it was confirmed that if the curved surface angle was excessively large as 16 degrees, the cleaning power by the bristles was reduced and cleaning around the molars was inhibited.

According to the results of the satisfaction survey for Example 11, it was confirmed that the toothbrush having a curved surface angle of 10.5 degrees and bristle holes of 5.5 mm left and right and 1.5 mm front and rear were dissatisfied with interdental cleaning. In particular, it was confirmed that if the left and right sizes of the bristle holes were excessively large as 5.5 mm, the interdental penetration of the bristles was lowered.

8 shows a toothbrush according to a second embodiment of the present invention.

Referring to Figure 8, Figure 8 is a toothbrush according to a second embodiment of the present invention, compared with the first embodiment, other configurations are all the same, the hair transplantation surface 15 is the front curved surface (15A) and only the point configured to have the rear curved surface 15B is different.

The bristle surface 15 of the toothbrush according to the second embodiment of the present invention has a front curved surface 15A disposed relatively forward and a rear curved surface 15B disposed relatively rearward. The front curved surface 15A is formed in a shape that is curved upward toward the front, and the rear curved surface 15B is formed in a shape that is curved upward toward the rear. The front curved surface 15A may correspond to the curved surface described in the first embodiment. The front curved surface 15A and the rear curved surface 15B may be connected to each other.

The front curved surface 15A may be formed such that the front virtual straight line L1 connecting the front end and the rear end forms an angle A1 of 3 to 15 degrees with respect to the horizontal. The rear curved surface 15B may be formed such that the rear virtual straight line L2 connecting the front end and the rear end forms an angle A2 of 3 to 10 degrees with respect to the horizontal.

According to such a front curved surface (15A) and a rear curved surface (15B), the hair transplantation surface can be formed in a shape that more accurately corresponds to or similar to the outer side of the curved teeth.

Although the present invention has been described above, the present invention is not limited by the disclosed embodiments and the accompanying drawings, and various modifications may be made by those skilled in the art without departing from the technical spirit of the present invention. In addition, the technical ideas described in the embodiments of the present invention may be implemented independently, or two or more may be implemented in combination with each other.

10: toothbrush stand
11: Handle of the toothbrush rest body
12: neck of the toothbrush rest body
13: head
14: upper surface of the toothbrush rest body
15: hair-transplanted cotton
15A: curved surface (front surface)
15B: curved surface (back surface)
16: hair implantation hole
20: hair bundle
25: toothbrush head
A1: Angle of curved surface (front surface)
A2: Angle of curved surface (back surface)
H1: Left and right size of the tuft hole (horizontal length)
H2: Front and back size of the hair-transplantation hole (vertical length)

Claims (9)

a toothbrush head having a head extending forward from the front end of the toothbrush rest body; Including hair bundles each implanted in the hair implantation holes of the head,
The upper surface of the toothbrush rest body is formed in a horizontal plane with at least half of the section rearward from the front end connected to the upper surface of the head,
The upper surface of the head is formed with a hair transplantation surface in which the hair transplantation holes are disposed,
The hair transplantation surface is formed as a curved surface of a shape that curves upward toward the front,
All of the hair implantation holes are wide holes that are formed in a larger shape than the front and rear sizes so that the hair bundles implanted in each have greater elasticity in the left and right directions compared to the front and rear directions,
toothbrush. a toothbrush head having a head extending forward from the front end of the toothbrush rest body; Includes hair bundles each implanted in the hair implantation holes of the head,
The upper surface of the head is formed with a hair-transplantation surface on which the hair-transplantation holes are disposed,
The hair transplantation surface is formed to have a curved surface of a shape that curves upward toward the front,
toothbrush. The method according to claim 1 or 2,
The curved surface is characterized in that the virtual straight line connecting the front end and the rear end is formed to form an angle of 3 to 15 degrees with respect to the horizontal,
toothbrush. 3. The method according to claim 2,
All of the hair transplant holes are characterized in that the left and right sizes are wide holes formed in a larger shape compared to the front and rear sizes so that the hair bundles implanted in each have greater elasticity in the left and right directions compared to the front and rear directions,
toothbrush. 5. The method according to claim 1 or 4,
The hair implantation holes,
The left and right sizes are 2.0 to 5.0 mm,
Characterized in that the front and rear sizes are 0.8 to 2.5 mm,
toothbrush. 3. The method according to claim 2,
The upper surface of the toothbrush head body is characterized in that at least half of the section is formed in a horizontal plane rearward from the front end connected to the upper surface of the head,
toothbrush. The method according to claim 1 or 2,
At least one or more of the hair implantation holes is tilted backward, characterized in that the hair bundles are implanted in a backward tilted state,
toothbrush. a toothbrush head having a head extending forward from the front end of the toothbrush rest body; Includes hair bundles each implanted in the hair implantation holes of the head,
The upper surface of the head is formed with a hair-transplantation surface on which the hair-transplantation holes are disposed,
The hair transplantation surface, doedoe having a front curved surface and a rear curved surface respectively arranged in the front and rear relatively, the front curved surface is formed in a shape that is curved upward toward the front, the rear curved surface is curved upward toward the rear in a shape that is curved formed,
toothbrush. 9. The method of claim 8,
The front curved surface is formed so that the front virtual straight line connecting the front end and the rear end forms an angle of 3 to 15 degrees with respect to the horizontal,
The rear curved surface is characterized in that the rear virtual straight line connecting the front end and the rear end is formed to form an angle of 3 to 10 degrees with respect to the horizontal,
toothbrush.

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