toothbrush

Abstract

Currently, oral care is recognized as one of the means to prevent various diseases, and various toothbrushes have been improved. However, tooth decay and periodontal disease are still widespread, and brushing is damaging teeth and gums. In other words, we have not yet acquired a toothbrush structure that allows for safe and reliable brushing. [Solution] The present invention improves upon the known toothbrush 1 in which the brush head 15 is a tall, long, roughly rectangular parallelepiped, which has an unstable shape when it comes into contact with the teeth 20 and gums 21. The present invention employs a roughly cubic structure for the brush head 5 of the toothbrush 1, with roughly the same length in the axial, width, and height directions, and a basic structure for the brush head 5 that corresponds to one tooth 20, thereby realizing smooth, accurate, and reliable brushing in which the movement of the fingers and the movement of the brush head 5 are integrated, without relying on the skill of the user.

Description

[Technical field]

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

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

[0003] First of all, brushing teeth is the basis of personal oral care, and is an important act of using a toothbrush to remove dirt from teeth and massage gums. Furthermore, there are several different ways to brush your teeth, 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 being vibrated finely. 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 in which the user moves their hands themselves require an accurate and reliable brushing technique that involves moving the brush part in small, rapid movements against the teeth, between the teeth, and on the gums, and vibrating it finely; this is a highly difficult manual movement that requires skill and delicacy for the user. In other words, people's daily tooth brushing is a brushing motion that is unique to each individual and has its own brushing habits, which can result in areas not being brushed, and can lead to tooth decay and periodontal disease not being improved. On the other hand, when used with electric or ultrasonic toothbrushes, the high-performance vibrations and rotating brush head can make the brush unstable against the teeth and gums, and the pressure applied when trying to stabilise the brush 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 movements against the teeth, between the teeth, and against the gums, and vibrates it finely, is difficult, and it is a highly delicate and skillful movement for the user to adjust the pressure on the teeth and gums. In other words, it is difficult to correct or improve an individual's unique movements that are repeated on a daily basis. On the other hand, toothbrushes have undergone improvements 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 extremely fine bristles.

[0006] Even though toothbrushes are constantly being improved, people still do not brush their teeth properly, as evidenced by the high incidence of cavities and periodontal disease. In the first place, the commonly taught brushing method is to move the toothbrush in small, frequent movements on 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 to make it easier for the user to brush.

[0007] Therefore, JP 2022-61929 A proposes. 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 less than half that of conventional toothbrushes (5mm ± 1mm). This proposal is an improvement that focuses on the problem 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 to less than half that of conventional toothbrushes, the tips of the bristles become harder in inverse proportion to their length. The harder bristles give a stronger feeling of brushing your teeth, remove tooth debris better, 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 primarily aimed at making toothbrushes last longer and making the bristles harder and the hard tips easier to remove debris from teeth. It does not take into consideration the health of teeth and gums, and is an improvement that is the exact opposite of the problem of current toothbrushes damaging 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 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 the 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 each individual tooth is novel. Furthermore, the structure of the handle part that corresponds to the proposed brush part has been improved, and a brushing method that involves operating the handle part has been proposed as a new tooth brushing method called the "ME method."

[0010] However, this proposal is a structure that is specific to one size, 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. In addition, the brush head is limited to one size based on the size of a specific first molar, and it is questionable whether it can be adapted to the different oral environments of users. Furthermore, a new brushing method using a new handle portion may cause new confusion for the user. In other words, a basic structure capable of providing brush parts of a plurality of sizes corresponding to different oral environments of users is not obtained. [Prior art documents] [Patent documents]

[0011] [Patent Document 1] JP 2022-61929 A [Non-patent literature]

[0012] [Non-Patent Document 1] "Based on the measurements of the first molars 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, the use of toothbrushes, interdental brushes, floss, etc. is widely promoted as part of oral care, 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 one's teeth with a toothbrush only removes about 50% of plaque. On the other hand, plaque removal can be improved by following the instructions of a dental hygienist and following a brushing routine that will ensure improved results every time you brush. However, the recommended brushing technique involves complex, difficult and skilled movements involving small, wiggly movements of the brush, and requires special training to perform the correct hand movements. For example, a common brushing method involves sliding the toothbrush over a relatively large area 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 skill to practice brushing techniques that make 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 the brush head is made 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 long and tall structure relative to the size of one tooth. In addition, the problem of pressure on the teeth and gums when brushing is a common issue shared by those who use electric toothbrushes. When trying to brush teeth using currently known toothbrushes, an effective brushing method is performed by bringing the brush head into contact with the teeth and gums and moving it in small, vibrating movements. However, the high tip of the brush head cannot make stable contact with the teeth and gums, so in an attempt to stabilize the brush head, the user must exert force on the hand holding the handle, and is unable to make subtle adjustments to the force applied. As a result, the user's hand movements become rough and the brushing is performed inappropriately, with large movements or strong pressure. In other words, the reason why users are unable to perform the various ideal brushing methods that are instructed is not due to the user's skill, but due 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 providing brushing instruction. 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 having a roughly rectangular parallelepiped structure that is taller than a single tooth. This is an example of a structure based on known ideas that assume effects such as a spring-like bending motion relative to the teeth and gums, the tips of the bristles penetrating between the teeth and between the teeth and gums and scraping them out, 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 would be used. However, known toothbrushes have a long and tall brush head that can accommodate multiple teeth. In other words, 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 for each tooth.

[0016] The objective of the present 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 during tooth brushing to the long and tall structure of the brushing portion of known toothbrushes, which is not targeted to a single tooth. In other words, the viewpoint is that there is no problem with the skill of the user, and the objective is to design a brush part structure that the user can use by himself. [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 portion is composed of a plurality of bristle bundles formed on the head portion of the toothbrush, The hair bundles are arranged in a substantially square shape on the upper surface of the head, The brush portion is provided at one end in the axial direction on the head upper surface portion of the head. a length in an axial direction from the hair bundle portion formed at the end portion to the hair bundle portion formed at the other end portion; a width direction length from the hair bundle portion formed at one end to the hair bundle portion formed at the other end in the width direction in 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 a tip of the hair bundle, The brush portion is formed to have a length in the axial direction, a length in the width direction, and a length in the height direction that are substantially the same, The brush portion 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 relates to a toothbrush having the brush unit, and the cross-sectional shape of the handle portion is formed into a substantially triangular or substantially pentagonal shape, The head top surface of the head and one side surface of the handle portion in the axial direction are formed substantially parallel to each other.

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

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

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

[0022] The present invention realizes a brush head structure that enables a user to perform an accurate and reliable brushing method by moving the brush head of the toothbrush in small wiggles and vibrating it finely. The present invention seeks to solve this problem by forming the brush part of the toothbrush into a roughly cubic structure in which the axial length, width length, and height length are roughly the same. In other words, by forming the brush part into an approximately cubic structure sized to fit a single tooth and designing it to stabilize the position of the brush part when it comes into contact with the teeth and gums, the movement of the hand and the movement of the brush part are integrated, allowing for smooth, accurate and reliable brushing without relying on the user's skill. The technical concept of the present invention shows a basic standard for configuring the size of the brush head of a toothbrush. Effect 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 not dependent on the user's skill a brush structure that ensures healthy oral cavity of the user.

[0024] The second effect of the present invention is to provide a plurality of brush part structures based on the basic structure of the brush part of the present invention, which can be adapted to the user's open interdental areas, fallen gum areas, missing teeth, and complex tooth alignment, etc.

[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 as well as contributing to environmental issues.

[0026] The fourth effect of the present invention is that, as a means of enhancing the effects 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 description 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. [Diagram 2] Fig. 2 is an explanatory diagram showing and comparing examples of the toothbrush 1 of the present invention and 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 the known toothbrush 11. [Diagram 3] 3 is an explanatory diagram for comparing and explaining an example 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] Fig. 4 is an explanatory diagram showing examples 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 bristle bundle portion 7 is formed in four places. Fig. 4-2 is a schematic perspective view showing an example in which the bristle bundle portion 7 is formed in five places. Fig. 4-3 is a schematic perspective view showing an example in which the bristle bundle portion 7 is formed in 16 places. [Diagram 5] Fig. 5 is an explanatory diagram showing 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. 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. [Figure 6]Fig. 6 is an explanatory diagram showing an example of the structure of the brush part 5 of the present invention. Fig. 6-1 is a schematic perspective view showing an example of the brush part additional part 51 in which the bristle bundle part 7 is added by about 30% to about 70% in the axial direction of the brush part 5. Fig. 6-2 is a schematic perspective view showing an example of the brush part additional part 51 in which the bristle bundle part 7 is added by about 30% to about 70% in the width direction of the brush part 5. Fig. 6-3 is a schematic perspective view showing an example of the brush part additional part 51 in which the bristle bundle part 7 is added by about 30% to about 70% in the height direction of the brush part 5. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[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 a toothbrush 1 according to the present invention and a known toothbrush 11 for comparison and explanation. This 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. 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. FIG. 13 is an explanatory diagram showing and comparing examples of the above. 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 teeth 20 and gums 21. As shown in FIG. FIG. 3-2 is a schematic cross-sectional view showing an example of a known toothbrush 11 when it comes 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 bristle bundle portions 7 are formed at four locations. FIG. 4-2 is a schematic perspective view showing an example in which five tufts 7 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 having 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 unit 5 of the present invention. FIG. 6-1 shows a brush head having a brush part with a tuft part 7 in the axial direction of the brush part, which is approximately 30% to approximately 70%. 11 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 bundle portion 7 is increased by approximately 30% to approximately 70% in the width direction of the brush head 5. 13 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 increased by approximately 30% to approximately 70% in the height direction of the brush portion 5. 1 is a schematic perspective view showing an example of an additional portion 51. FIG.

[0029] First, an embodiment of the brush unit 5 of the present invention will be shown and 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 section 5 formed by a bristle bundle 7 implanted in the head 2 will be shown and explained. Moreover, the brush part 5 shown in FIG. 1 shows an example of a new structure for improving the brush portion of the toothbrush 1. Moreover, the brush portion 5 shown in FIG. 1 is an example characterized in that it is composed of a plurality of bristle bundles 7 formed on the head 2 of the toothbrush 1 and arranged in an approximately square shape on the head upper surface 6 of the head 2.

[0031] Next, the brush part 5 shown in FIG. 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 width 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. In addition, 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 are 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 bundle portions 7 shown in Figure 1 are formed in three rows in the axial direction and three rows in the width direction on the head upper surface portion 6 of the head 2 of the toothbrush 1, with nine bristle bundle portions 7 arranged in a substantially square shape, illustrating an example of a feature of the present invention that constitutes the brush portion 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. In addition, the hair bundle portion 7 shown in Figure 1 shows an example in which the hair bundle portion 7 is composed of a total of nine hair bundle portions 7 on the head upper surface portion 6 of the head 2, but the number of hair bundle portions 7 and the arrangement configuration are not specified or limited.

[0033] Moreover, the brush unit 5 shown in FIG. 1 shows an example characterized by a structure corresponding to the size of one tooth unit 20 of a user. Furthermore, the brush part 5 shown in FIG. 1 may naturally adopt a number of sizes of brush part 5 corresponding to different sizes of the teeth 20 of users, and is not specified or limited to the sizes shown here. The basic structure that can accommodate a number of sizes of brush part 5 corresponding to the sizes of the 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 with a size corresponding 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 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.

[0035] Next, the brush part 5 of the toothbrush 1 of the present invention shown in Figure 2-1 is composed of bristle bundle parts 7 in three rows in the axial direction and three rows in the width direction, for a total of nine bristle bundle parts 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. In addition, the brush part 5 of the present invention shown in Figure 2-1 is characterized by an approximately cubic structure formed by the bristle bundle part 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 part 20 and gums part 21, thereby enabling 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 an example of a commonly used toothbrush having a roughly rectangular prism shape that is long in the axial direction and high in the height direction, with the bristle bundles 7 17 being composed of 7 columns in the axial direction and 3 rows in the width direction, for a total of 21 bristle bundles 7. Furthermore, the known toothbrush 11 shown in FIG. 2-2 shows an example of the lengths corresponding to the axial length A, width direction length B, and height direction 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 having 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 and 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 axially long and tall in height, when a user attempts to coordinate the movement of the user's hand with the movement of the tip of the brush head 15, 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 shown by the widespread prevalence of tooth decay and periodontal disease, despite dentists and dental hygienists recommending the importance of brushing as a preventive 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 poor brushing technique on the part of the user, but rather is a structure that makes it difficult to perform accurate and reliable brushing. The problem lies in the fact that the brush portion 15 is too large and disproportionately sized for one tooth portion 20, creating an unstable posture relative to the tooth portion 20 and gum portion 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 the skill of the user. 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 causing inadequate brushing without achieving sufficient brushing results. In other words, the brush head 15 of the known toothbrush 11 shown in FIG. 2-2 is a tall, long rectangular prism, and has an unstable posture, which requires skill on the part of the user to come into contact with the teeth 20 and gums 21, making reliable brushing difficult.

[0037] Next, FIG. 3 shows the toothbrush 1 of the present invention and a known toothbrush 11, which are arranged on the teeth 20 and gums. 21. FIG. 21 is an explanatory diagram for explaining the comparison of examples of contact. 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 teeth 20 and gums 21. As shown in FIG. FIG. 3-2 is a schematic cross-sectional view showing an example of a known toothbrush 11 when it comes into contact with teeth 20 and 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-sectional view of the tooth portion 20 and the gum portion 21 will be shown and described. Furthermore, the brush portion 5 of the toothbrush 1 of the present invention 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 has approximately the same length, and shows an example of the posture when coming into contact with the teeth portion 20 and the gums 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, thereby realizing brushing of one tooth part 20.

[0039] Next, the brush part 5 shown in Figure 3-1 will be explained by showing the brush part approximately side portion 5a indicating the axial direction, the brush part approximately top surface portion 5b indicating the width direction, and the brush part approximately front surface portion 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, and can stably contact the tooth part 20 during 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 allows stable contact with the boundary between the tooth portion 20 and the gum portion 21 and the gap between the tooth portions 20, etc., and enables effective brushing by abutting the brush portion 5 against the tooth portion 20 and the gum portion 21 and moving it in small increments to vibrate finely. In addition, the approximate upper surface portion 5b of the brush part in Figure 3-1 shows the approximate upper surface of the brush part 5 in the width direction, and is an approximately cubic shape corresponding to the three dimensions of length, width, and height of one tooth part 20, 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 portion 20 and the gum portion 21 and the gaps between the tooth portions 20, etc., allows the brush portion to come into contact with the teeth and gums, move in small increments, and vibrate finely, thereby achieving effective brushing. In addition, the brush part approximate front portion 5c in Figure 3-1 shows the approximate front portion of the brush part 5 in the height direction, and has an approximately cubic shape corresponding to the three dimensions of length, width, and height of one tooth part 20, and can stably contact the tooth part 20 when brushing, thereby achieving effective brushing by abutting the brush part 5 against the teeth 11 and gums 12 and moving it in small increments to vibrate finely. Furthermore, the structure that allows stable contact with the boundary between the tooth portion 20 and the gum portion 21 and the gaps between the tooth portions 20, etc., allows the brush portion to come into contact with the teeth and gums, move in small increments, and vibrate finely, thereby achieving effective brushing. In other words, the brush part 5 of the present invention shown in Figure 3-1 is formed into an approximately cube-like shape with a size corresponding to that of one of the tooth parts 20, and it can be visually confirmed that it is in stable contact with the periphery of one of the tooth parts 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, thereby 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-sectional view 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 portions 7 at 21 locations in total, 7 locations in the axial direction and 3 locations in the width direction. In addition, 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. In addition, the brush part approximate side portion 15a in Figure 3-2 shows an approximate side surface of the brush part 15 in the axial direction, and has an approximately rectangular shape that is longer in the axial direction and taller in the height direction than its 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 brush part 15 cannot flexibly respond 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 integrated, and the size and shape make smooth, accurate and reliable brushing impossible. Excessive pressure and unnecessary hand movements negate the effect of brushing. As a result, the teeth 20 and gums 21 are damaged, and a sufficient brushing effect cannot be achieved, resulting in insecure brushing. In other words, the problem with the known toothbrush 11 is that, because the tall and long rectangular prism is unstable, the user is required to use skill when brushing the teeth 20 and gums 21. In addition, the brush part approximate upper surface portion 15b in Figure 3-2 shows the approximate upper surface of the brush part 15 in the axial width direction, and has an approximately rectangular shape that is long in the axial direction and high in the height direction relative to its length in the width direction. It can be visually confirmed that the posture of the long and high brush part 15 is unstable with respect to one tooth part 20. Since the long and high brush part 15 cannot flexibly respond 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 are not integrated, and the size and shape make smooth, accurate and reliable brushing impossible. Excessive pressure and unnecessary hand movements negate the effect of brushing. As a result, the teeth 20 and gums 21 are damaged, and a sufficient brushing effect cannot be achieved, resulting in insecure brushing. In other words, the problem with the known toothbrush 11 is that, because the tall and long rectangular prism is unstable, the user is required to use skill when brushing the teeth 20 and gums 21. In addition, the brush part approximate front portion 15b in Figure 3-2 shows the approximate front portion of the brush part 15 in the height direction, and has an approximately rectangular shape that is long in the axial direction and high in the height direction relative to its width direction. It can be visually confirmed that the posture of the long and high brush part 15 is unstable with respect to one tooth part 20. Since the long and high brush part 15 is linearly unable to 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 match, and the size and shape make smooth, accurate and reliable brushing impossible. Excessive pressure and unnecessary hand movements negate the effect of brushing. As a result, the teeth 20 and gums 21 are damaged, and a sufficient brushing effect cannot be achieved, resulting in insecure brushing. In other words, the problem with the known toothbrush 11 is that, because the tall and long rectangular prism is unstable, the user is required to use skill when brushing the teeth 20 and gums 21. 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 a structure in which it contacts multiple teeth 20 and the teeth 20 and gums 21, and it is a visually confirmable fact that the size of the long and tall brush part in a straight line is not suitable for appropriate contact with the curved shape of the teeth 20 and gums 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 a single tooth portion 20 is advocated, the basis for assuming that the size of the publicly known toothbrush 11 is appropriate as the size of the brush portion 15 for brushing a single tooth portion 20 is unclear. The present invention challenges the common sense that requires the skill of the user to perform reliable and accurate brushing, and seeks to improve on this by finding the cause 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 bristles 7 are formed. FIG. 4-3 is a schematic perspective view showing an example in which 16 tufts of bristles 7 are formed. In addition, each brush part 5 shown in Figure 4 illustrates and explains an example in which the number and arrangement of bristle bundle parts 7, which have an approximately cubic structure that is a feature of the present invention, are different, with each side in the axial direction, width direction, and height direction being approximately the same length. In addition, the thickness, number, material, shape, etc. of the bristles of the bristles 7 are appropriately selected from known examples. It is natural that the above-mentioned cases will be applied, and the above cases are not specified or limited here.

[0043] Next, the brush part 5 of the present invention shown in FIG. 4-1 shows 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 in which the brush portion 5 of the present invention shown in FIG. 4-1 is formed are not specified or limited here. The brush unit 5 of the present invention shown in FIG. 4-1 is arranged in four positions, two rows in the axial direction and two columns in the width direction. This shows an example in which the bristle bundle 7 is configured as a tuft of bristles, and the head 3 has a generally cubic shape rotated 90° with respect to the axial direction. For example, the brush portion 5 of the present invention has a structure similar to that of a tufted brush used in the gaps between the teeth 20 and the like. Another feature of this configuration is that it forms a small bristle bundle portion 7, and the bristle bundle portion 7 of the small brush part 5 is intended to accommodate spaces between teeth, periodontal pockets, teeth with orthodontic devices, and irregular tooth alignment. In addition, the present invention is not limited to or specific to the brush unit 5 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 composed of a tuft of hairs 7. For example, it is natural that the bristle bundle 7 can be configured by selecting bristles appropriate for each application, 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, an example of specifications is shown that assumes a relatively hard bristle part 7 that corresponds to the user's large and healthy teeth part 20 and gums part 21. In addition, the present invention is not limited to or specified by the brush unit 5 shown in FIG. 4-2.

[0045] Next, the brush unit 5 of the present invention shown in FIG. 4-3 has a total of 16 brushes, with four columns in the axial direction and four rows in the width direction. This shows an example in which the device is composed of three tufts 7. 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. In addition, the present invention is not limited to or specific to the brush unit 5 shown in FIG. 4-3.

[0046] Next, an example of a new handle portion 41 of a toothbrush 1 having 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 that when brushing, the handle portion 4 should be held in the same manner as one holds a pencil. On the other hand, general users have become accustomed to gripping the handle portion 4 when brushing, but this is gradually improving among younger users. However, the incomplete removal of plaque, which causes tooth decay and periodontal disease, is manifested 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 inability to perform reliable and accurate brushing by finding 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 the 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. In other words, 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. Furthermore, the new handle portion 41 of the present invention is characterized in that the head top surface 6 of the head 2 and one of the axial side surfaces 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 surface 6 when brushing, thereby enabling the user's contacting fingers to always grasp the position of the top surface of the brush part 5, thereby ensuring reliable brushing. In addition, the new handle portion 41 of the present invention is formed so that the user's fingers come into contact with the flat portions and corners of the new handle portion 41 when brushing, so that the user's fingers can effectively operate the new handle portion 41 and the corners act to suppress excessive pressure. In addition, the new handle portion 41 of the present invention allows the user's fingers, which come into contact with the flat portions and corners of the new handle portion 41, to grasp the shape of the teeth portion 20 and the position of the brush portion 5, thereby preventing any areas from being left unbrushed, and also allows the user's fingers to accurately grasp the gap between the teeth portion 20 and the gums portion 21, thereby preventing damage to the gums 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 the known toothbrush 11 injures the teeth 20 and gums 21, by replacing the recommended gripping position with a pencil grip. In other words, this is a proposal for a new handle portion 41 structure that allows the position of the top surface of the brush portion 5 to be grasped at all times, and allows the shape and condition of the teeth portion 20 and gums portion 21 to be confirmed and recognized with the fingertips through the top surface of the brush portion 5 when brushing, thereby enabling the user to smooth the movement of their hand and achieve accurate brushing by understanding the movement of the tip portion of the brush portion 5. Furthermore, the new handle portion 41 of the toothbrush 1 equipped with the brush portion 5 of the present invention shown in Figure 5 is an improvement over the known handle portion 14, which further serves as a means of physically ensuring at the fingertips that the structure that is characteristic of the brush portion 5 of the present invention, in which the movement of the user's hand and the movement of the brush portion 5 are integrated. In addition, 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 specific or limited to this example. Furthermore, the new handle portion 41 shown in FIG. 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 the brush part 5 in the width direction by approximately 30% to approximately 70%. FIG. FIG. 6-3 is a schematic perspective view showing an example in which the bristle bundle portion 7 is increased by approximately 30% to approximately 70% in the height direction of the brush part 5. As shown in FIG. In addition, the example of the structure of the brush part 5 of the present invention shown in Figure 6 adopts a structure that can respond to the unique oral environment of the user and 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 portion 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 part 7 is added by about 30% to about 70% in the axial direction of the brush part 5. As shown in FIG. In addition, the brush part additional 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 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 axial, width and height directions all having the same length. On the other hand, the brush part 15 of the known toothbrush 11 has a rectangular shape that is long in the axial direction and tall in the vertical direction, and has an axial length and height that are more than twice as long as the width length. In other words, the width direction length and height direction height of the brush part 5 and the 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 the change in shape of the brush part 5 or the change in feel when using the toothbrush. In response to this, the shape of the brush part 5 is composed of a brush part additional part 51, which adds approximately 30% to approximately 70% of the bristle bundle part 7 in the axial direction of the brush part 5, and the brush part 5. For example, the brush head 5 of the present invention is provided with an axial structure similar to that of known toothbrushes 11 so that users who are unfamiliar with the structure of the brush head 5 can easily brush the front and back teeth, which are relatively straight-line shaped areas. For example, the brush part 5 of the present invention is provided with an axial structure similar to that of known toothbrushes 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, for a user who is unfamiliar with the structure of the brush portion 5 of the present invention, the axial structure is provided to be similar to that of known toothbrushes 11 so that brushing can be easily performed when the teeth are uneven or when the sizes of each part of the teeth portion 20 are particularly different.

[0052] Next, an example of the structure of the brush portion 5 of the present invention will be described with reference to FIG. 6-2. FIG. 6-2 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 about 30% to about 70% in the width direction of the brush part 5. As shown in FIG. In addition, 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 it 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 axial, width and height directions all having the same length. On the other hand, the brush part 15 of the known toothbrush 11 has a rectangular shape that is 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 as long as the width length. In other words, the axial length and height length of the brush part 5 and the 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 the change in shape of the brush part 5 or the change in feel when using the toothbrush. This is addressed by providing a shape that is composed of the brush part 5 and a brush part additional part 51 that adds approximately 30% to approximately 70% of the bristle bundle part 7 in the width direction of the brush part 5. For example, in order to accommodate a dentition in which the gums 21 have receded due to excessive brushing, aging, periodontal disease, etc., exposing the tooth roots, or in order 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 the known toothbrush 11 so that they can easily brush the front teeth or with the teeth part 20 in contact with each other from above and below. 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 known toothbrushes 11 so that they can easily brush from the outside to the inside of their back teeth.

[0053] Next, another example of the structure of the brush portion 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 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 about 30% to about 70% in the height direction of the brush part 5. As shown in FIG. In addition, 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 it 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 shape in which the brush part 15 is 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 the 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 the change in shape of the brush part 5 or the change in feel when using the toothbrush. This is addressed by providing a shape that is composed of the brush part 5 and a brush part additional part 51 that adds approximately 30% to approximately 70% of the bristle bundle part 7 in the height direction of the brush part 5. For example, for users who are unfamiliar with the structure of the brush part 5 of the present invention, the brush part 5 is provided with a height structure similar to that of known toothbrushes 11 so that they can easily brush spaces between missing teeth due to tooth extraction, gaps between teeth that are unique to each individual, and spaces between teeth that are open due to aging, etc. For example, it is provided with a height structure similar to that of known toothbrushes 11 so that brushing can be easily performed on users with poor tooth alignment, such as uneven teeth or adjacent teeth of different sizes. For example, the brush portion 5 of the present invention is provided with a height structure similar to that of known toothbrushes 11 so that users who are unfamiliar with the structure of the brush portion 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 section 41 New handle part 5. Brush section 5a: Brush part approximate side part 5b: Upper surface of brush part 5c Brush section front part 51 Brush section attachment 6...Top of head 7 Hair bundle 8. Intersection 9. Tip of hair bundle A: Axial length B: Width direction C: Height direction 11. Known toothbrush 12·Head 13... Neck 14··Handle section 15 Brush section 15a: Brush part approximate side part 15b: Upper surface of brush 15c - Brush part front part 16...Top of head 17 Hair bundle 18 Intersection 19 Tip of hair bundle a Axial length b: Width direction c Height direction 20 Teeth 21. Gums

Claims

[Claim 1] A toothbrush comprising a head portion, a neck portion, a handle portion, and a brush portion, The brush portion is composed of at least four bristle bundles formed on the head of the toothbrush, The hair bundles are arranged on the top surface of the head to form a square, and are formed at four corners of the square, The brush portion has a length in the axial direction of the handle portion from the bristle bundle portion formed at one end of the handle portion in the axial direction to the bristle bundle portion formed at the other end of the head upper surface portion of the head, and a width direction length from the hair bundle portion formed at one end to the hair bundle portion formed at the other end in the width direction on the head upper surface portion of the head, the length being perpendicular to the axial length of the handle portion; The handle portion has a length in the axial direction and a length in the width direction, and the length in the height direction is from an intersection of the axial direction and the width direction to a tip of the tuft portion, the tip being perpendicular to the axial direction and the width direction. The brush portion is formed such that the length of the bristle bundle portion in the axial direction, the length in the width direction, and the length in the height direction of the handle portion are the same, The toothbrush is characterized in that the brush portion is formed into a cubic structure defined by three sides: the axial length of the handle portion, the width length, and the height length.

Images