Toothbrush

Abstract

Currently, oral care is recognized as one of means for preventing various diseases, and various toothbrushes have been improved. However, dental caries and periodontal disease have become widespread, and brushing damages teeth and gums. That is, we have not yet obtained a toothbrush structure that enables safe and reliable brushing.SOLUTION: The present invention improves the shape of the brush portion 15 of the known toothbrush 1, which is a high and long substantially rectangular parallelepiped and unstable in posture when coming into contact with the tooth portion 20 and the gum portion 21. In the present invention, the brush portion 5 of the toothbrush 1 has a substantially cubic structure in which the axial direction, the width direction, and the height direction have substantially the same length, and a basic structure of the brush portion 5 corresponding to one tooth portion 20 is adopted, so that smooth, accurate, and reliable brushing in which the movement of the fingers and the movement of the brush portion 5 are integrated is realized without depending on the skill of the user.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a toothbrush design that improves brushing effectiveness. [Background technology]

[0002] In general, tooth decay and periodontal disease are not initially painful or directly life-threatening, and are not considered to be particularly important among lifestyle-related diseases, but they are recognized as causes of systemic diseases. It is also well known that daily brushing of teeth and regular removal of plaque and tartar by a dentist are essential for preventing tooth decay and periodontal disease.

[0003] First of all, brushing your teeth is the basis of oral care that people do themselves, and it is an important act of using a toothbrush to remove dirt from your teeth and massage your gums. Furthermore, there are several ways to brush your teeth with a toothbrush, depending on the angle and movement of the brush relative to the teeth and gums. The first method is the relatively recommended Charters method, in which the bristles are placed against the teeth at a 45-degree angle and rotated while vibrating slightly. The second method is the Bass method, in which the bristles are placed between the teeth and gums at a 45-degree angle and moved back and forth in quick motions. The third method is to scrub by placing the bristles at a 90-degree angle between the teeth and gums and moving them back and forth in quick motions. The fourth method is the roll method, in which the bristles of the toothbrush are placed parallel to the gums and rotated from the gums toward the tips of the teeth. There are also various other brushing methods, such as inserting the bristles between the teeth and vibrating them, moving the bristles in a circular motion, and the toothpick method, in which the bristles are inserted between the teeth and gums. On the other hand, there are tooth brushing methods that use electric toothbrushes that utilize the vibration and rotational motion of the brush, and ultrasonic toothbrushes that use ultrasound to break down plaque.

[0004] However, the multiple brushing methods that require the user to move their hands themselves require an accurate and reliable brushing technique that involves moving the brush part in small, wiggly movements against the teeth, between the teeth, and on the gums, vibrating them finely, which is a delicate and difficult manual movement that requires skill for the user. In other words, people's daily tooth brushing is a habitual, individualized brushing motion that leaves areas unbrushed, leading to the failure to improve tooth decay and periodontal disease. On the other hand, when using electric or ultrasonic toothbrushes, the high-performance vibrations and rotating brush head can make them unstable against the teeth and gums, and the pressure applied when trying to stabilize them can cause problems such as excessive grinding of the teeth or damage to the gums.

[0005] In the first place, the brushing method, in which the user moves the brush part in small, frequent movements against the teeth, between the teeth, and against the gums, vibrating it finely, is difficult, and it is a highly delicate and skillful action for the user, requiring adjustment of the pressure on the teeth and gums. In other words, it is difficult to correct or improve the unique movements of each individual that are repeated on a daily basis. On the other hand, toothbrushes have been improved in terms of the size and thickness of the brush head, the size of the brush, the arrangement of the brush, and the bristles and bristle bundles, such as the use of ultra-fine bristles.

[0006] Even though toothbrushes are being improved every day, people are still not brushing their teeth properly, as evidenced by the high incidence of cavities and periodontal disease. In the first place, the brushing method that is generally taught is to move the toothbrush in small, frequent movements over each tooth, vibrating it finely. However, are known toothbrushes of an appropriate size for performing a brushing method that targets a single tooth and involves small, wiggly movements of the brush head and fine vibrations? In other words, there are no improvements to the structure of the brush part that would make it easier for the user to brush.

[0007] Therefore, the proposal of JP 2022-61929 A is as follows. This proposal focuses on the length of the bristles, which are formed into a brush-like shape with the height of the bristles from the base to about half that of conventional toothbrushes (5mm±1mm). This proposal focuses on the fact that as toothbrushes are used more frequently, the bristles spread apart, reducing the number of bristles that touch the teeth, making it difficult to remove debris from the teeth. In other words, by shortening the height of the bristles of the brush to less than half of what they were on conventional toothbrushes, the bristles become harder in inverse proportion to their length. The harder bristles give a stronger feeling of brushing your teeth, remove tooth debris more effectively, and the bristles open more slowly than on conventional toothbrushes, making the toothbrush last longer.

[0008] This proposal focuses on the height of the brush part, and the viewpoint of limiting the height of the bristles of the brush part is a noteworthy proposal. However, this proposal is focused on making toothbrushes last longer and making the bristles harder and the hard tips easier to remove debris from teeth. Its lack of consideration for teeth and gums makes it an improvement that is the exact opposite of the problem of current toothbrushes, which can damage teeth and gums. In other words, unfortunately, the design lacks consideration for the biggest problem when brushing your teeth, which is the pressure that the brush exerts on the teeth and gums when brushing, and instead adopts a structure that actually increases the pressure.

[0009] Next, from the perspective of dental hygienists as professionals, there are doubts about the size and shape of toothbrushes based on their function as tools, and a toothbrush has been proposed that focuses on the first molar, the largest tooth, as the factor in determining the size of the bristles, and uses the size of the first molar as the basis for determining the size of the bristles. This proposal was designed based on measurements of the first molar, with a length of 14 mm (5 steps), a width of 9 mm (4 steps), This toothbrush has bristles aligned at 10mm height, with both corners of the tip arranged at right angles. This proposal follows the recent trend of smaller toothbrush sizes, and its approach of adapting to the size of a single tooth is novel. Furthermore, the structure of the handle part corresponding to the proposed brush part has been improved, and a new brushing method using the handle part has been proposed as the "ME method."

[0010] However, this proposal is a structure that is specified to one size as a toothbrush, with a length of 14 mm - 5 sections, a width of 9 mm - 4 sections, and bristles of 10 mm, with both corners of the tip arranged at right angles. Furthermore, the brush head is limited to one size based on the size of a specific first molar, and it is questionable whether it can accommodate different oral environments of users. Furthermore, the new brushing method using the new handle portion may cause new confusion for the user. In other words, the basic structure that allows provision of brush heads of a plurality of sizes corresponding to different oral environments of users has not been achieved. [Prior art documents] [Patent documents]

[0011] [Patent Document 1] Japanese Patent Application Laid-Open No. 2022-61929 [Non-patent literature]

[0012] [Non-Patent Document 1] "Based on the measurement values ​​of the first molars present in the oral cavity" Japanese Society of Dental Engineering, Dental Division of the Japanese Ergonomics Society, 1993 Summary of the Invention [Problem to be solved by the invention]

[0013] Currently, tooth decay and periodontal disease are recognized as one of the causes of various diseases. In addition, oral care is promoted by promoting the use of toothbrushes, interdental brushes, floss, etc., and daily tooth brushing by the user as well as regular removal of plaque and tartar by a dental hygienist are recommended as important preventive measures. In the first place, it is said that brushing your teeth with a toothbrush only removes about 50% of the plaque. On the other hand, plaque removal can be reliably improved by following the instructions of a dental hygienist and practicing brushing techniques that will ensure improved results with each brushing session. However, the recommended brushing method involves small, wiggly movements of the brush head and fine vibrations, which are complex, difficult, and require skill, and special training is required to perform the correct hand movements. For example, a common brushing method involves sliding the toothbrush over a relatively large distance to brush multiple teeth at the same time, and also involves pressing the toothbrush against the teeth, which can result in damage to the teeth and gums. In other words, it is a guideline to perform a brushing method that makes effective use of the brush part.

[0014] Currently known toothbrushes have a long and tall brush head that corresponds to the size of two or more teeth, and a brush head structure with tufts of bristles that are designed to move like a spring, scraping the teeth and gums with the tips of the bristles. That is, the brush head of the known toothbrush is characterized by a structure that is long and tall relative to the size of one tooth. In addition, the problem of pressure on teeth and gums when brushing is a common issue shared by those who use electric toothbrushes. When brushing teeth using currently known toothbrushes, if you try to perform an effective brushing method by placing the brush head against the teeth and gums and moving it in small, wiggly movements to vibrate finely, the tip of the high brush head cannot make stable contact with the teeth and gums. As a result, the user has to use force in the hand holding the handle in an attempt to stabilize the brush head, making it impossible to make subtle adjustments to the force, resulting in rough hand movements and inappropriate brushing, such as large movements or strong pressure. In other words, the reason why users are unable to perform the various ideal brushing methods that they are taught is not due to the user's skill, but to the structure of the toothbrush.

[0015] Therefore, the present invention focuses on a brushing method that targets a single tooth, which is recommended when giving brushing instructions. Today, known toothbrushes are presumed to employ an ideal structure for the brush section, with the brush section being longer than a single tooth and higher than a single tooth, forming an approximately rectangular parallelepiped structure. This shows an example of a structure based on known ideas that assume the effects of a spring-like bending action relative to the teeth and gums, the ability of the bristles to penetrate between the teeth and gums and scrape out debris, and making stiff bristles feel soft. In the first place, if one tooth is targeted, as is recommended when providing brushing instructions, a brush head of a size that corresponds to one tooth should be used. However, known toothbrushes for some reason employ a long and tall brush head that can accommodate multiple teeth. That is, the problem with the brush part of the known toothbrush is that the brush part is formed as a rectangular parallelepiped that is long in the axial direction and high in the height direction relative to one tooth.

[0016] The objective of this invention is not to attribute the inaccurate and insufficient lashing that causes tooth decay and periodontal disease to the skill of the user, but to attribute the cause to the structure of the toothbrush, in which the brush head does not correspond to the size of a single tooth. The present invention attributes the brushing problem to the long and tall structure of the brushing portion of known toothbrushes, which does not target a single tooth. In other words, the idea is to take the view that there is no problem with the skill of the user, and to design a brush part structure that the user can use by themselves. [Means for solving the problem]

[0017] The present invention provides a toothbrush comprising a head portion, a neck portion, a handle portion, and a brush portion, The brush part is composed of a plurality of bristle bundles formed on the head part of the toothbrush, The hair bundles are arranged in a substantially square shape on the upper surface of the head, The brush part is provided at one end in the axial direction on the head top surface part of the head. a length in an axial direction from the formed tuft portion to the tuft portion formed at the other end portion; a widthwise length from the hair bundle formed at one end to the hair bundle formed at the other end in the widthwise direction at the head upper surface portion of the head, the length being approximately perpendicular to the axial length; the length in the axial direction and the length in the width direction are substantially perpendicular to each other, and the length in the height direction is from an intersection of the intersection to the tip of the bristle bundle, The brush part is formed so that the length in the axial direction, the length in the width direction, and the length in the height direction are approximately the same, The brush part is characterized in that it is formed in a substantially cubic structure having three sides, the length in the axial direction, the length in the width direction, and the length in the height direction.

[0018] The present invention provides a toothbrush including the brush head, wherein the cross section of the handle is formed into a substantially triangular or substantially pentagonal shape, The head upper surface of the head and one axial side surface of the handle are formed substantially parallel to each other.

[0019] In the present invention, the bristle bundle portion is added to the axial direction of the brush portion by approximately 30% to approximately 70%. It is characterized by:

[0020] In the present invention, the bristle bundle portion is added to approximately 30% to approximately 70% of the width of the brush portion. It is characterized by:

[0021] The present invention is characterized in that the bristle bundle portion is added to the brush portion in the height direction by approximately 30% to approximately 70%.

[0022] The present invention provides a brush head structure that allows the user to perform an accurate and reliable brushing method by moving the brush head of the toothbrush in small, wiggly movements and vibrating it finely. The present invention aims to solve this problem by forming the brush part of the toothbrush into an approximately cubic structure in which the axial length, width length, and height length are approximately the same. In other words, the brush part is formed into an approximately cubic structure that is sized to fit one tooth, and the structure stabilizes the posture of the brush part when it comes into contact with the teeth and gums. This integrates the movement of the hand and the movement of the brush part, allowing for smooth, accurate, and reliable brushing without relying on the user's skill. The technical concept of the present invention indicates a basic standard for configuring the size of the brush head of a toothbrush. [Effects of the Invention]

[0023] The first effect of the present invention is that the structure of the brush head of known toothbrushes, which is a tall, long, approximately rectangular parallelepiped structure, has been improved to an approximately cubic structure, so that the brush head comes into stable contact with the teeth and the movement of the hand and the movement of the brush head are integrated, making brushing that is independent of the user's skill a brush structure that ensures good oral health for the user.

[0024] The second effect of the present invention is to provide multiple brush part structures based on the basic structure of the brush part of the present invention, which can be used to accommodate gaps between the user's teeth and gums, fallen gums, missing teeth, and complex tooth alignment.

[0025] The third effect of the present invention is to improve the size of the brush part of the toothbrush to a rational structure, thereby reducing the number of bristle parts and the number of bristle bundles, contributing to a reduction in the manufacturing cost of the toothbrush and contributing to environmental issues.

[0026] The fourth effect of the present invention is that, as a means of enhancing the effect of the present invention, the cross section of the handle portion is formed into an approximately triangular or approximately pentagonal shape, and one axial side portion of the handle portion and the upper surface portion of the brush portion are formed approximately parallel to each other, thereby enabling brushing while checking the position of the upper surface portion of the brush portion with a finger. In other words, the structure that integrates the movement of the user's hand with the toothbrush prevents damage to the teeth and gums and improves the effectiveness of brushing, thereby shortening the brushing time. [Brief explanation of the drawings]

[0027] [Figure 1] FIG. 1 is a schematic perspective view of a toothbrush 1 showing an example of a brush head 5 of the present invention. [Figure 2] Figure 2 is an explanatory diagram showing and comparing examples of the toothbrush 1 of the present invention and a known toothbrush 11. Figure 2-1 is a schematic perspective view showing an example of the toothbrush 1 of the present invention. Figure 2-2 is a schematic perspective view showing an example of the known toothbrush 11. [Figure 3] 3A and 3B are explanatory diagrams illustrating and comparing examples of when the toothbrush 1 of the present invention and the known toothbrush 11 come into contact with the teeth 20 and gums 21. FIG. 3-1 is a schematic cross-sectional view showing an example of when the toothbrush 1 of the present invention comes into contact with the teeth 20 and gums 21. FIG. 3-2 is a schematic cross-sectional view showing an example of when the known toothbrush 11 comes into contact with the teeth 20 and gums 21. [Figure 4] Figure 4 is an explanatory diagram showing examples of the bristle bundles 7 of the toothbrush 1 of the present invention. Figure 4-1 is a schematic perspective view showing an example in which the bristle bundles 7 are formed in four places. Figure 4-2 is a schematic perspective view showing an example in which the bristle bundles 7 are formed in five places. Figure 4-3 is a schematic perspective view showing an example in which the bristle bundles 7 are formed in 16 places. [Figure 5] Figure 5 is an explanatory diagram showing an example of the structure of the new handle portion 41 of the toothbrush 1 equipped with the brush head 5 of the present invention. Figure 5-1 is a perspective view of the toothbrush 1 showing an example of the new handle portion 41 of the present invention. Figure 5-2 is a schematic cross-sectional view showing an example of the cross section taken along line XX in Figure 5-1. [Figure 6]Figure 6 is an explanatory diagram showing an example of the structure of the brush unit 5 of the present invention. Figure 6-1 is a schematic perspective view showing an example of a brush unit additional part 51 in which the bristle bundle parts 7 are added by approximately 30% to approximately 70% in the axial direction of the brush unit 5. Figure 6-2 is a schematic perspective view showing an example of a brush unit additional part 51 in which the bristle bundle parts 7 are added by approximately 30% to approximately 70% in the width direction of the brush unit 5. Figure 6-3 is a schematic perspective view showing an example of a brush unit additional part 51 in which the bristle bundle parts 7 are added by approximately 30% to approximately 70% in the height direction of the brush unit 5. DETAILED DESCRIPTION OF THE INVENTION

[0028] Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 1, 2, 3, 4, 5 and 6. FIG. FIG. 1 is a schematic perspective view of a toothbrush 1 showing an example of a brush head 5 of the present invention. FIG. 2 shows an example of the toothbrush 1 of the present invention and a known toothbrush 11 for comparison and explanation. It is a clear diagram. FIG. 2-1 is a schematic perspective view showing an example of a toothbrush 1 of the present invention. FIG. 2-2 is a schematic perspective view showing an example of a known toothbrush 11. As shown in FIG. FIG. 3 shows a toothbrush 1 of the present invention and a known toothbrush 11 in contact with a tooth area 20 and a gum area 21. 10A and 10B are explanatory diagrams illustrating examples of the above-mentioned processes and comparing them. FIG. 3-1 is a schematic cross-sectional view showing an example of the toothbrush 1 of the present invention when it comes into contact with the teeth 20 and the gums 21. As shown in FIG. FIG. 3-2 is a schematic cross-sectional view showing an example of a known toothbrush 11 coming into contact with teeth 20 and gums 21. As shown in FIG. FIG. 4 is an explanatory diagram illustrating an example of the bristle bundle portion 7 of the toothbrush 1 of the present invention. FIG. 4-1 is a schematic perspective view showing an example in which the tuft portions 7 are formed at four locations. FIG. 4-2 is a schematic perspective view showing an example in which five tufts of hair are formed. FIG. 4-3 is a schematic perspective view showing an example in which 16 tufts of hair are formed. FIG. 5 shows an example of the structure of a new handle portion 41 of a toothbrush 1 equipped with a brush head 5 of the present invention. FIG. FIG. 5-1 is a perspective view of a toothbrush 1 showing an example of a new handle portion 41 of the present invention. FIG. 5-2 is a schematic cross-sectional view showing an example of a cross section taken along line XX in FIG. 5-1. FIG. 6 is an explanatory diagram showing another example of the structure of the brush part 5 of the present invention. FIG. 6-1 shows a brush head with a brush part in which the bristle bundle part 7 is added in the axial direction of the brush part by approximately 30% to approximately 70%. 10 is a schematic perspective view showing an example of a mounting portion 51. FIG. FIG. 6-2 shows a brush head in which the bristle bundles 7 are added to approximately 30% to approximately 70% of the width of the brush head 5. 10 is a schematic perspective view showing an example of an additional portion 51. FIG. FIG. 6-3 shows a brush in which the bristle bundle portion 7 is added to about 30% to about 70% in the height direction of the brush portion 5. 10 is a schematic perspective view showing an example of an additional section 51. FIG.

[0029] First, an embodiment of the brush unit 5 of the present invention will be described with reference to FIG. FIG. 1 is a schematic perspective view of a toothbrush 1 showing an example of a brush head 5 of the present invention.

[0030] Next, the toothbrush 1 shown in Figure 1 is composed of a head 2, a neck 3, and a handle 4, and an example of a brush part 5 formed by a bristle bundle 7 implanted in the head 2 is shown and explained. Moreover, the brush part 5 shown in FIG. 1 shows an example of a novel structure that improves the brush part of the toothbrush 1. Furthermore, the brush part 5 shown in Figure 1 is an example characterized in that it is composed of multiple bristle bundles 7 formed on the head 2 of the toothbrush 1 and arranged in an approximately square shape on the head top surface 6 of the head 2.

[0031] Next, the brush part 5 shown in Figure 1 is composed of nine bristle bundles 7 formed on the head 2 of the toothbrush 1, and is arranged in a substantially square shape on the head top surface 6 of the head 2, and is composed of an axial length A from the bristle bundle 7 formed at one end in the axial direction to the bristle bundle 7 formed at the other end on the head top surface 6 of the head 2, a widthwise length B from the bristle bundle 7 formed at one end in the widthwise direction to the bristle bundle 7 formed at the other end on the head top surface 6 of the head 2, which is substantially perpendicular to the axial length, and a heightwise length C from an intersection 8 where the axial length and the widthwise length substantially intersect to a bristle bundle tip 9, which is substantially perpendicular to the axial length. The brush part shown in Figure 1 is an example characterized in that the axial length A, width length B, and height length C are formed to be approximately the same length, and is formed into an approximately cubic structure consisting of three sides: the axial length A, the width length B, and the height length C.

[0032] Next, the bristle bundles 7 shown in Figure 1 are formed in three axial rows and three width rows on the head top surface 6 of the head 2 of the toothbrush 1, with nine bristle bundles 7 arranged in an approximately square shape, illustrating an example of a feature of the present invention that constitutes the brush part 5. Furthermore, the hair bundle portion 7 shown in FIG. 1 is not intended to specify or limit the number of hair bundle portions 7 or the number of hairs, but rather shows an example in which the hair bundle portions 7 are arranged in a substantially square shape. Naturally, the hair bundle portions 7 and the material of the hair to be implanted can be selected and used from known techniques, and are not intended to specify or limit the number of hair bundle portions 7 or the number of hairs. Furthermore, the hair bundle portions 7 shown in Figure 1 are an example of hair bundle portions 7 in a total of nine locations on the head upper surface portion 6 of the head 2, but the number of hair bundle portions 7 and the arrangement configuration thereof are not specified or limited.

[0033] Moreover, the brush part 5 shown in FIG. 1 shows an example characterized by a structure corresponding to the size of one tooth part 20 of the user. Furthermore, the brush part 5 shown in Figure 1 may naturally adopt multiple sizes of brush part 5 corresponding to different sizes of teeth 20 of users, and is not specified or limited to the sizes shown here.The basic structure that can accommodate multiple sizes of brush part 5 corresponding to the sizes of teeth 20 of various users is a feature of the present invention. In other words, the brush part 5 shown in Figure 1 is formed into an approximately cubic structure that is sized to correspond to one tooth part 20, and is formed into a structure that stabilizes the posture of the brush part 5 when it comes into contact with the tooth part 20 and gum part 21.As a result, the movement of the hand and the movement of the brush part 5 are integrated, and smooth, accurate, and reliable brushing can be performed without relying on the skill of the user. The technical idea of ​​the present invention is to solve the problem of the brush part 15 of the known toothbrush 11, which has an approximately rectangular parallelepiped structure that is long in the axial direction and high in the vertical direction, by providing a brush part 5 that is approximately cubic in shape with three sides of the same length.

[0034] Next, FIG. 2 is an explanatory diagram for comparing the toothbrush 1 of the present invention with a known toothbrush 11. FIG. 2-1 is a schematic perspective view showing an example of the toothbrush 1 of the present invention. FIG. 2-2 is a schematic perspective view showing an example of a known toothbrush 11. As shown in FIG.

[0035] Next, the brush part 5 of the toothbrush 1 of the present invention shown in Figure 2-1 is composed of bristle bundles 7 in three rows in the axial direction and three rows in the width direction, for a total of nine bristle bundles 7, which are formed to be approximately the same length in the axial direction, width direction, and height direction, and shows an example of the structure of the brush part 5 being approximately cubic in shape. Furthermore, the brush part 5 of the present invention shown in Figure 2-1 is characterized by an approximately cubic structure formed by bristle bundle parts 7, and is not dependent on the number of columns or rows, as long as the bristles are planted within the shape of the approximately cube, and the number of bristle bundle parts 7 and the number of bristles can naturally be adopted and configured from any suitable combination, and are not specified or limited. In other words, the brush part 5 of the present invention shown in Figure 2-1 is characterized by having bristles planted in an approximately cubic shape, and is formed in a shape that stabilizes the posture of the brush part 5 when it comes into contact with the teeth 20 and gums 21, allowing the user's hand and the brush part 5 to move together, thereby enabling smooth, accurate, and reliable brushing.

[0036] On the other hand, the structure of the known toothbrush 11 shown in Figure 2-2 shows a commonly used example in which the bristle bundles 17 are arranged in seven columns in the axial direction and three rows in the width direction, for a total of 21 bristle bundles 7, and have an approximately rectangular parallelepiped shape that is long in the axial direction and tall in the height direction. Furthermore, the known toothbrush 11 shown in Figure 2-2 shows an example of the length corresponding to the axial length A, widthwise length B, and heightwise length C of the brush part 5 of the toothbrush 1 of the present invention, each of which is 100. In other words, the known toothbrush 11 shown in Figure 2-2 is an example of a roughly rectangular parallelepiped shape that has an axial length a of 250 relative to the axial length A shown in Figure 2-1, a widthwise length b of 100 relative to the widthwise length B shown in Figure 2-1, and a heightwise length c of 150 relative to the heightwise length C shown in Figure 2-1, for comparison. For example, the known toothbrush 11 shown in Figure 2-2 shows an example of a structure based on the concept of the known toothbrush 11, in which the long, tall bristle bundle 17 bends like a spring against the teeth 20 and gums 21, the tips of the bristles penetrate between the teeth and between the teeth 20 and gums 21 and scrape them out, and the stiff bristles feel soft. However, with the known toothbrush 11, which is long in the axial direction and tall in the vertical direction, when the user tries to perform an action in which the movement of the user's hand and the movement of the tip of the brush head 15 are integrated, the long, tall, and large structure relative to a single tooth head 20 makes it difficult to perform accurate and reliable brushing, and it is visually evident that this calls into question the user's skill. Evidence of this is that tooth decay and periodontal disease are rampant despite dentists and dental hygienists recommending the importance of brushing as a preventative measure against these conditions. In other words, the structure of the known toothbrush 11 shown in FIG. 2-2 is not a sign of a user's poor brushing technique, but rather a structure that makes it difficult to perform accurate and reliable brushing. The problem is that the brush part 15 is too large and disproportionate in size to one tooth part 20, creating an unstable posture with respect to the tooth part 20 and the gum part 21. Furthermore, the teeth 20 and gums 21 are uneven and curved, and brushing the uneven gaps between the teeth is difficult in terms of skill. As a result, excessive brushing action and pressure may be applied, making it difficult to perform proper brushing, damaging the teeth 20 and gums 21, and resulting in inadequate brushing without achieving sufficient brushing effect. In other words, the brush head 15 of the known toothbrush 11 shown in Figure 2-2 is a tall, long rectangular parallelepiped, and its posture is unstable, so the user's skill is required to contact the teeth 20 and gums 21, which makes reliable brushing difficult.

[0037] Next, FIG. 3 shows the toothbrush 1 of the present invention and the known toothbrush 11, with respect to the teeth 20 and gums. 21. FIG. 3-1 is a schematic cross-sectional view showing an example of the toothbrush 1 of the present invention when it comes into contact with the teeth 20 and the gums 21. As shown in FIG. FIG. 3-2 is a schematic cross-sectional view showing an example of the known toothbrush 11 when it comes into contact with the teeth 20 and the gums 21. As shown in FIG.

[0038] Next, the tooth portion 20 shown in FIG. 3-1 is assumed to be a molar, and an example of a schematic cross section of the tooth portion 20 and the gum portion 21 will be described. Furthermore, the brush portion 5 of the toothbrush 1 of the present invention shown in Figure 3-1 shows an example in which the bristle bundle portion 7 is formed into an approximately cubic structure with three columns in the axial direction, three rows in the width direction, and a height in the height direction, each side of which is of approximately the same length, and shows an example of the posture when coming into contact with the tooth portion 20 and the gum portion 21. In addition, the brush part 5 of the present invention shown in Figure 3-1 has an approximately cubic shape corresponding to the size of one tooth part 20, and the area of ​​the tip part of the brush part 5 can correspond to each side of the tooth part 20, so that brushing targeting one tooth part 20 can be realized.

[0039] Next, the brush part 5 shown in Figure 3-1 will be explained by showing the brush part approximately side part 5a indicating the axial direction, the brush part approximately top part 5b indicating the width direction, and the brush part approximately front part 5c indicating the height direction. In addition, the approximate side surface portion 5a of the brush part in Figure 3-1 shows the approximate side surface of the brush part 5 in the axial direction, and has an approximately cubic shape corresponding to the size of one tooth part 20, allowing it to stably contact the tooth part 20 when brushing, thereby achieving effective brushing by abutting the brush part 5 against the tooth part 20 or gum part 21 and moving it in small increments to vibrate finely. Furthermore, the structure that allows stable contact with the boundary between the tooth part 20 and the gum part 21 and the gap between the tooth parts 20, etc., allows the brush part 5 to abut against the tooth part 20 and the gum part 21 and move in small increments, vibrating finely, thereby realizing effective brushing. In addition, the brush part approximate upper surface portion 5b in Figure 3-1 shows the approximate upper surface of the brush part 5 in the width direction, and is an approximate cubic shape corresponding to the three dimensions of one tooth part 20 in length, width, and height, and can stably contact the tooth part 20 when brushing, so that the brush part 5 can be brought into contact with the tooth part 20 and gum part 21 and moved in small increments to achieve fine vibrations, thereby achieving effective brushing. Furthermore, the structure that allows stable contact with the boundary between the tooth part 20 and the gum part 21 and the gap between the tooth parts 20 realizes effective brushing by making the brush part contact the teeth and gums and moving it in small increments to vibrate finely. In addition, the approximate front surface 5c of the brush part in Figure 3-1 shows the approximate front surface of the brush part 5 in the height direction, and is an approximately cubic shape that corresponds to the three dimensions of one tooth part 20 in terms of length, width, and height.This allows for stable contact with the tooth part 20 when brushing, so that the brush part 5 can be brought into contact with the teeth 11 and gums 12 and moved in small increments to achieve effective brushing by finely vibrating them. Furthermore, the structure that allows stable contact with the boundary between the tooth part 20 and the gum part 21 and the gap between the tooth parts 20 realizes effective brushing by making the brush part contact the teeth and gums and moving it in small increments to vibrate finely. In other words, the brush part 5 of the present invention shown in Figure 3-1 is formed into an approximately cubic shape with a size corresponding to the size of one tooth part 20, and it can be visually confirmed that it makes stable contact with the periphery of one tooth part 20.As a result, smooth, accurate and reliable brushing is achieved in which the movement of the user's hand and the movement of the brush part 3 are integrated, demonstrating the technical idea of ​​the present invention.

[0040] Next, the tooth portion 20 shown in FIG. 3-2 is assumed to be a molar, and an example of a schematic cross section of the tooth portion 20 and the gum portion 21 will be described. FIG. 3-2 is a schematic cross-sectional view of a known toothbrush 11, showing an example of contacting teeth 20 and gums 21. Next, a known toothbrush 11 shown in FIG. 3-2 is an example in which the toothbrush is configured with bristle implants 7 at 21 locations in total, 7 locations in the axial direction and 3 locations in the width direction. Furthermore, the known toothbrush 11 shown in Figure 3-2 shows an example of a length that is approximately 250% of the axial length in Figure 3-1, an example of a length that is 100% of the width direction, and an example of a length that is 150% of the height direction.

[0041] Next, the brush part 15 shown in Figure 3-2 will be explained by showing the brush part approximately side part 15a indicating the axial direction, the brush part approximately top part 15b indicating the width direction, and the brush part approximately front part 15c indicating the height direction. Furthermore, the approximate side surface portion 15a of the brush part in Figure 3-2 shows the approximate side surface of the brush part 15 in the axial direction, and has the shape of an approximately rectangular parallelepiped that is longer in the axial direction and taller in the height direction relative to its widthwise length. It is visually apparent that the posture of the long and tall brush part 15 is unstable relative to one tooth part 20, and since the long and tall, linear brush part 15 cannot flexibly adapt to the curved shape of the tooth part 20 and gum part 21, the movement of the user's hand and the movement of the brush part 15 do not become one, resulting in a size and shape that makes smooth, accurate, and reliable brushing impossible, and excessive pressure and unnecessary hand movements will negate the effectiveness of brushing. As a result, the teeth 20 and gums 21 are damaged, and sufficient brushing effect cannot be achieved, resulting in insecure brushing. In other words, the problem with the known toothbrush 11 is that the tall and long rectangular parallelepiped shape is unstable, so that brushing the teeth 20 and gums 21 requires skill from the user. Furthermore, the approximate upper surface portion 15b of the brush part in Figure 3-2 shows the approximate upper surface of the brush part 15 in the axial width direction, and has the shape of an approximately rectangular parallelepiped that is longer in the axial direction and taller in the height direction relative to its length in the width direction. It can be visually confirmed that the posture of the long and tall brush part 15 is unstable with respect to one tooth part 20. Since the long and tall, linear brush part 15 cannot flexibly adapt to the curved shape of the tooth part 20 and gum part 21, the movement of the user's hand and the movement of the brush part 15 do not become one, and the size and shape make smooth, accurate, and reliable brushing impossible. Excessive pressure and unnecessary hand movements will negate the effectiveness of brushing. As a result, the teeth 20 and gums 21 are damaged, and sufficient brushing effect cannot be achieved, resulting in insecure brushing. In other words, the problem with the known toothbrush 11 is that the tall and long rectangular parallelepiped shape is unstable, so that brushing the teeth 20 and gums 21 requires skill from the user. Furthermore, the brush part approximate front surface portion 15b in Figure 3-2 shows the approximate front surface of the brush part 15 in the height direction, and has the shape of an approximately rectangular parallelepiped that is longer in the axial direction and taller in the height direction relative to its width direction. It is also visually apparent that the posture of the long and tall brush part 15 is unstable relative to a single tooth part 20. Since the long and tall, linear brush part 15 cannot flexibly adapt to the curved shape of the tooth part 20 and gum part 21, the movement of the user's hand and the movement of the brush part 15 do not become one, and the size and shape make smooth, accurate, and reliable brushing impossible. Excessive pressure and unnecessary hand movements will negate the effectiveness of brushing. As a result, the teeth 20 and gums 21 are damaged, and sufficient brushing effect cannot be achieved, resulting in insecure brushing. In other words, the problem with the known toothbrush 11 is that the tall and long rectangular parallelepiped shape is unstable, so that brushing the teeth 20 and gums 21 requires skill from the user. In the first place, as shown in Figure 3-2, the tall and long rectangular shape of the brush part 15 of the known toothbrush 11 is based on the premise that it will be in contact with multiple tooth parts 20 and with the tooth parts 20 and gum parts 21, and it is a visually verifiable fact that the size of the brush part, which is long and tall, is not such that it will be in proper contact with the curved shape of the tooth parts 20 and gum parts 21, and it is clear that proper brushing using the size of the known toothbrush 11 requires rigorous training. Furthermore, although a brushing method that assumes one tooth portion 20 is being promoted, the basis for considering the size of the publicly known toothbrush 11 as the appropriate size for the brush portion 15 for brushing one tooth portion 20 is unclear. The present invention challenges the common sense that requires the user's skill to perform reliable and accurate brushing, and seeks to improve on this by finding the cause of this in the tall and long rectangular parallelepiped shape of the known toothbrush 11.

[0042] Next, another example of the brush unit 5 of the present invention will be described with reference to FIG. FIG. 4 is an explanatory diagram showing another example of the brush unit 5 of the present invention. FIG. 4-1 is a schematic perspective view showing an example in which the tuft portions 7 are formed in four places. FIG. 4-2 is a schematic perspective view showing an example in which five tufts of hair are formed. FIG. 4-3 is a schematic perspective view showing an example in which 16 tufts of hair are formed. In addition, each brush part 5 shown in Figure 4 illustrates and explains an example in which the number and arrangement of the bristle bundle parts 7, which have an approximately cubic structure that is a feature of the present invention, are different, with each side of the bristle bundle parts 7 having approximately the same length in the axial direction, width direction, and height direction. In addition, the thickness, number, material, shape, etc. of the bristles of the bristles 7 are suitably selected from known examples. It is natural that the above will be applied, and nothing is specified or limited here.

[0043] Next, the brush part 5 of the present invention shown in FIG. 4-1 is an example in which bristle bundle parts 7 are formed at four locations. Furthermore, the shapes and configurations of the head portion 2, neck portion 3, handle portion 4, and the like on which the brush portion 5 of the present invention shown in FIG. 4-1 is formed are not specified or limited here. The brush part 5 of the present invention shown in FIG. 4-1 is arranged in two rows in the axial direction and two columns in the width direction, for a total of four positions. This shows an example in which the head 3 is configured with a tuft portion 7 of the above-mentioned shape, and the shape of a substantially cube is rotated 90° with respect to the axial direction. For example, the brush head 5 of the present invention has a structure similar to that of a tuft brush used in the gaps between the tooth portions 20. Another feature of this configuration is that it forms a small bristle bundle 7, and the bristle bundle 7 of the small brush part 5 is intended to address areas between teeth, periodontal pockets, teeth with orthodontic devices, and irregular tooth alignment. Furthermore, the brush unit 5 of the present invention is not limited to or specified as shown in FIG. 4-1.

[0044] Next, the brush part 5 of the present invention shown in FIG. 4-2 is arranged in a total of five positions, three columns in the axial direction and three rows in the width direction. This shows an example in which the brush is made up of a tuft of hairs 7. For example, it is natural that the bristle bundle 7 can be configured by selecting bristles that are suitable for each purpose, such as bristles that have been twisted to give them high elasticity, bristles with uneven sides, or bristles with processed tips. By adopting the brush part 5 teeth and thick bristle part 7 shown in Figure 4-2, this shows an example of specifications that assume a relatively hard bristle part 7 that corresponds to the user's large, healthy teeth 20 and gums 21. Furthermore, the brush unit 5 of the present invention is not limited to or specified as shown in FIG. 4-2.

[0045] Next, the brush part 5 of the present invention shown in FIG. 4-3 has four columns in the axial direction and four rows in the width direction, for a total of 16 pieces. This shows an example in which the hair is made up of tufts 7 in two places. For example, this shows an example of a brush unit 5 that uses thin and soft bristle bundles 7 for people who are reluctant to use a normal bristle bundle 7, such as those with exposed teeth due to receding gums or gums with periodontal disease. Furthermore, the brush unit 5 of the present invention is not limited to or specified as shown in FIG. 4-3.

[0046] Next, an example of a new handle portion 41 of a toothbrush 1 equipped with a brush portion 5 of the present invention will be shown with reference to FIG. and explain. FIG. 5-1 is a perspective view of a toothbrush 1 showing an example of a new handle portion 41 of the present invention. FIG. 5-2 is a schematic cross-sectional view showing an example of a cross section taken along line XX in FIG. 5-1.

[0047] Currently, dental hygienists and other professionals recommend and teach brushing by holding the handle 4 in the same way as one holds a pencil. On the other hand, while general users have become accustomed to gripping the handle portion 4 when brushing, this is gradually improving among younger users. However, the incomplete removal of plaque, which causes tooth decay and periodontal disease, is evident in the widespread occurrence of tooth decay and periodontal disease.

[0048] Therefore, the present invention seeks to solve the problem of repeated incomplete brushing and the inability to perform reliable and accurate brushing by looking for the cause in the structure of the brush part 5. Furthermore, the handle portion 4 is improved as a means for improving the effect of the brush portion 5 of the present invention. The new handle portion 41 of the present invention is characterized in that its cross section is formed into a substantially triangular or substantially pentagonal shape, and the head top surface portion 6 of the head portion 2 and one side surface portion in the axial direction of the new handle portion 41 are formed substantially parallel to each other. This feature further develops the effect of the technical idea of ​​the present invention. That is, a new handle portion 41 structure is invented as a means for further improving the effect of the structure of the brush portion 5 of the present invention. Furthermore, the structure of the new handle portion 41 of the present invention is not specified or limited to being formed on a toothbrush 1 having the structure of the brush portion 5 of the present invention.

[0049] Next, the new handle portion 41 of the toothbrush 1 equipped with the brush 5 of the present invention shown in Figure 5 shows an example in which the shape of the outer periphery is formed into an approximately triangular shape, but this is not specified or limited to an approximately triangular shape. Another feature of the new handle portion 41 of the present invention is that the head top portion 6 of the head 2 and one of the axial side portions of the new handle portion 41 are formed approximately parallel to each other so that the user's fingers can always be aware of the head top portion 6 when brushing, thereby allowing the user's fingers to always be aware of the position of the top surface of the brush portion 5, thereby ensuring reliable brushing. Furthermore, the new handle portion 41 of the present invention is formed so that the user's fingers come into contact with the flat and corner portions of the new handle portion 41 when brushing, allowing the user's fingers to effectively operate the new handle portion 41 and the corner portions to suppress excessive pressure. Furthermore, the new handle portion 41 of the present invention allows the user's fingers, which come into contact with the flat or corner portions of the new handle portion 41, to grasp the shape of the tooth portion 20 and the position of the brush portion 5, thereby preventing any areas from being left unbrushed, and also allows the user to accurately grasp the gap between the tooth portion 20 and the gum portion 21, thereby preventing damage to the gum portion 21. For example, the new handle portion 41 of the present invention provides an improvement over the current situation in which gripping the handle portion 14 of a known toothbrush 11 causes damage to the teeth 20 and gums 21, by replacing the recommended gripping position with a pencil gripping position. In other words, this is a proposal for a new handle part 41 structure that allows the position of the top surface of the brush part 5 to be grasped at all times, and allows the shape and condition of the teeth part 20 and gums part 21 to be confirmed and recognized with the fingertips through the top surface of the brush part 5 when brushing, thereby enabling the user to smoothly move their hand and to grasp the movement of the tip part of the brush part 5, thereby achieving accurate brushing. Furthermore, the new handle 41 of the toothbrush 1 equipped with the brush head 5 of the present invention shown in Figure 5 is an improvement over the known handle 14, which further improves on the structure of the brush head 5 of the present invention, in which the movement of the user's hand and the movement of the brush head 5 are integrated, by physically ensuring this with the fingertips. Furthermore, the new handle portion 41 of the toothbrush 1 equipped with the brush portion 5 of the present invention shown in Figure 5 shows an example in which the cross-sectional shape is formed into an approximately triangular shape, but this is not intended to be specific or limited to this. Furthermore, the new handle portion 41 shown in Figure 5 does not have to be formed with the same diameter along its entire length, and this is not specified or limited, and it may be formed with a combination of cross sections of different shapes along its entire length, and this is not specified or limited.

[0050] Next, another example of the structure of the brush part 5 of the present invention will be described with reference to FIG. FIG. 6 is an explanatory diagram showing an example of the structure of the brush unit 5 of the present invention. FIG. 6-1 shows an example in which the bristle bundle portion 7 is added in the axial direction of the brush portion 5 by approximately 30% to approximately 70%. FIG. FIG. 6-2 shows an example in which the bristle bundle portion 7 is added to approximately 30% to approximately 70% of the width of the brush portion 5. FIG. FIG. 6-3 is a schematic perspective view showing an example in which the bristle bundle portion 7 is added to the brush unit 5 in the height direction by approximately 30% to approximately 70%. Furthermore, the example of the structure of the brush part 5 of the present invention shown in Figure 6 is a structure that can accommodate the unique oral environment of the user and can assist the user's brushing skills, and does not detract from the technical idea of ​​the present invention.

[0051] Next, an example of the structure of the brush part 5 of the present invention will be described with reference to FIG. 6-1. FIG. 6-1 is a schematic perspective view showing an example of a configuration of the brush part 5 and a brush part additional part 51 in which the bristle bundle part 7 is added by approximately 30% to approximately 70% in the axial direction of the brush part 5. As shown in FIG. Furthermore, the brush part addition portion 51 shown in Figure 6-1 shows an example in which the bristle bundle portion 7 is added in the axial direction of the brush part 5 by approximately 30% to approximately 70%, but this is not specified or limited to approximately 30% to approximately 70%. First, the brush part 5 of the present invention is characterized by its substantially cubic shape, with the same length in the axial direction, width direction and height direction. On the other hand, the brush part 15 of the known toothbrush 11 is rectangular in shape, long in the axial direction and tall in the vertical direction, and has an axial length and vertical height that are more than twice the width length. In other words, the widthwise length and heightwise height of the brush part 5 and brush part additional part 51 shown in Figure 6-1 are the same as the axial length, and this does not detract from the technical idea of ​​the present invention. For example, when switching from using a known toothbrush 11 to using the toothbrush 1 of the present invention, users may find it difficult to adapt to changes in the shape of the brush head 5 or changes in feel when using the toothbrush. This is addressed by providing a shape that is composed of the brush head 5 and a brush head attachment portion 51 that adds approximately 30% to approximately 70% of the bristle bundle portion 7 in the axial direction of the brush head 5. For example, the brush part 5 of the present invention is provided with an axial structure similar to that of a known toothbrush 11 so that users who are unfamiliar with the structure of the brush part 5 can easily brush the front teeth and back teeth, which are relatively straight-shaped areas. For example, the brush part 5 of the present invention is provided with an axial structure similar to that of a known toothbrush 11 so that users who are unfamiliar with the structure of the brush part 5 can easily brush misaligned teeth or teeth wearing orthodontic appliances. For example, the brush head 5 of the present invention is provided with an axial structure similar to that of a known toothbrush 11 so that users who are unfamiliar with the structure of the brush head 5 can easily brush uneven teeth or teeth 20 with particularly different sizes.

[0052] Next, an example of the structure of the brush part 5 of the present invention will be shown and described with reference to FIG. 6-2. FIG. 6-2 is a schematic perspective view showing an example in which the brush part 5 and the brush part additional part 51, which adds approximately 30% to approximately 70% of the bristle bundle part 7 in the width direction of the brush part 5, are configured. Furthermore, the brush part additional portion 51 shown in Figure 6-2 shows an example in which approximately 30% to approximately 70% is added in the width direction of the brush part 5, but this is not specified or limited to approximately 30% to approximately 70%. First, the brush part 5 of the present invention is characterized by its substantially cubic shape, with the same length in the axial direction, width direction and height direction. On the other hand, the brush part 15 of the known toothbrush 11 is rectangular in shape, long in the axial direction and long in the vertical direction, and has a structure in which the axial length and vertical length are more than twice the width length. In other words, the axial length and height length of the brush part 5 and brush part additional part 51 shown in Figure 6-2 are the same as the width length, and this does not detract from the technical idea of ​​the present invention. For example, when switching from using a known toothbrush 11 to using the toothbrush 1 of the present invention, users may find it difficult to adapt to changes in the shape of the brush head 5 or changes in feel when using the toothbrush. This is addressed by providing a shape that is composed of the brush head 5 and a brush head additional section 51 that adds approximately 30% to approximately 70% of the bristle bundle section 7 in the width direction of the brush head 5. For example, to accommodate a dentition in which the gums 21 have receded due to excessive brushing, aging, periodontal disease, etc., exposing the tooth roots, or to accommodate receding gums 21 due to aging, the brush part 5 is designed to be slightly longer in the width direction. For example, for users who are unfamiliar with the structure of the brush part 5 of the present invention, it is provided with a widthwise structure similar to that of a known toothbrush 11 so that they can easily brush with the tooth parts 20 in contact with each other above and below, or brush the front teeth. For example, the brush portion 5 of the present invention is provided with a widthwise structure similar to that of a known toothbrush 11 so that users who are unfamiliar with the structure of the brush portion 5 can easily brush their molars from the outside to the inside.

[0053] Next, another example of the structure of the brush part 5 of the present invention will be described with reference to FIG. 6-3. FIG. 6-3 is a schematic perspective view showing an example in which the brush part 5 and the brush part additional part 51, which adds approximately 30% to approximately 70% of the bristle bundle part 7 in the height direction of the brush part 5, are configured. Furthermore, the brush part additional portion 51 shown in Figure 6-3 shows an example in which the brush part 5 is increased by approximately 30% to approximately 70% in the height direction, but this is not specified or limited to approximately 30% to approximately 70%. First, the brush part 5 and the brush part additional part 51 of the present invention are characterized by their substantially cubic shape, with the same length in the axial direction, width direction and height direction. On the other hand, the brush part 15 of a known toothbrush 11 has a rectangular parallelepiped shape, with the brush part 15 being long in the axial direction and long in the vertical direction, and has a structure in which the axial length and vertical length are more than twice the width length. In other words, the axial length and width length of the brush part 5 and brush part additional part 51 shown in Figure 6-3 are the same as the height length, and this does not detract from the technical idea of ​​the present invention. For example, when switching from using a known toothbrush 11 to using the toothbrush 1 of the present invention, users may find it difficult to adapt to changes in the shape of the brush head 5 or changes in feel when using the toothbrush. This is addressed by providing a shape that is composed of the brush head 5 and a brush head additional section 51 that adds approximately 30% to approximately 70% of the bristle bundle section 7 in the height direction of the brush head 5. For example, the brush part 5 of the present invention is provided with a height structure similar to that of a known toothbrush 11 so that users who are unfamiliar with the structure of the brush part 5 can easily brush gaps between missing teeth due to tooth extraction, gaps between teeth that are unique to each individual, and gaps between teeth caused by aging, etc. For example, it is provided with a height structure similar to that of a known toothbrush 11 so that brushing can be easily performed on users with poorly aligned teeth, such as uneven teeth or adjacent teeth of different sizes. For example, the brush part 5 of the present invention is provided with a height structure similar to that of a known toothbrush 11 so that users who are unfamiliar with the structure of the brush part 5 can easily brush the backs of their front teeth and backs of their molars. [Explanation of symbols]

[0054] 1. Toothbrush 2...Head 3... Neck 4. Handle 41··New handle part 5. Brush section 5a: Brush part approximately side surface 5b: Brush section upper surface 5c: Front part of brush 51 Brush section additional section 6...Top of head 7. Hair bundle 8. Intersection 9 Tip of hair bundle A: Axial length B: Width C: Height 11. Known toothbrush 12·Head 13... Neck 14 Handle 15 Brush section 15a: Brush part approximately side 15b: Brush section upper surface 15c - Front part of brush 16...Top of head 17··Hair bundle 18··Intersection 19 Tip of hair bundle a: Axial length b: Width direction c: Height 20 Teeth 21. Gums

Claims

1. A toothbrush comprising a head portion, a neck portion, a handle portion, and a brush portion, The brush part is composed of a plurality of bristle bundles formed on the head part of the toothbrush, The hair bundles are arranged in a substantially square shape on the upper surface of the head, The brush part is formed at one end in the axial direction on the head top surface part of the head. a length in an axial direction from the tuft portion formed at one end to the tuft portion formed at the other end; a widthwise length from the hair bundle formed at one end to the hair bundle formed at the other end in the widthwise direction at the head upper surface portion of the head, the length being approximately perpendicular to the axial length; the length in the axial direction and the length in the width direction are substantially perpendicular to each other, and the length in the height direction is from an intersection of the intersection to the tip of the bristle bundle, The brush part is formed so that the length in the axial direction, the length in the width direction, and the length in the height direction are approximately the same, The toothbrush is characterized in that the brush part is formed into an approximately cubic structure consisting of three sides: the axial length, the width length, and the height length.

2. The toothbrush having the brush head has a handle portion whose cross section is formed into a substantially triangular or substantially pentagonal shape, 2. The handle portion according to claim 1, wherein the head top surface of the head and one axial side surface of the handle portion are formed substantially parallel to each other.

3. 2. The toothbrush according to claim 1, wherein the bristle bundles are added to the brush head in the axial direction by approximately 30% to approximately 70%.

4. 2. The toothbrush according to claim 1, wherein the bristle bundles occupy approximately 30% to approximately 70% of the width of the brush head.

5. 2. The toothbrush according to claim 1, wherein the bristle bundles are added to the brush head in the height direction by approximately 30% to approximately 70%.

Images