JP2016010498A - toothbrush - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a toothbrush achieving both cleaning effect and massage effect at a high dimension through an unconventional approach, and excellent in insertion property into the back teeth.SOLUTION: A toothbrush is such that a head part 3 provided on a front end of a handle body is implanted with a plurality of cleaning bristle tufts 16 made by bundling a plurality of cleaning bristle tufts, and a plurality of massage bristle tufts 14 made by bundling a plurality of massage bristle tufts having a cross sectional area smaller than that of the cleaning bristle tuft. The plurality of massage bristle tufts 14 are arranged in one row in outer right and left sides of the head part 3. The plurality of cleaning bristle tufts 16 are arranged in a front part 3a and a rear part 3c of the head part 3, and a center part 3b therebetween, in the inside than the massage bristle tufts 14, and are arranged in the front part 3a so as to be expanded to the outside than the center part 3b.

Description

  The present invention relates to a toothbrush.

  Caries and alveolar pyorrhea are diseases caused by bacteria, and as a countermeasure, cleaning of the oral cavity, specifically, removal of plaque by brushing with a toothbrush is effective. For alveolar pyorrhea, a toothbrush that does not give stimulation to the gums and has a massage effect is required. For example, as described in Patent Document 1, the inner flocking density is reduced, It has been studied to increase the flocking density.

JP 2012-34845 A

  However, with this toothbrush, when it is moved in the direction to be inserted into the mouth and pulled out from the mouth, the outer flocks fall down too much, so that a sufficient massage effect cannot be obtained. In addition, this toothbrush has a low flocking density in the front part of the head part, so that it is difficult to obtain a sufficient cleaning effect for the back teeth. Furthermore, in such toothbrushes, attempts have been made to increase the cleaning effect by increasing the flocking area of thick hair, but the stiffness of the hair bundle becomes stronger, making it difficult to insert into the back teeth, and achieving both massage effects There was a problem that I could not.

  In this background, the present inventor who tried to improve the toothbrush has achieved the contradictory factors of the cleaning effect and the massage effect in the conventional design concept of adjusting the flocking density on the outside and inside. Furthermore, in addition to this, we have found that there is a limit to ensuring insertion into the back teeth.

  The present invention has been made on the basis of such knowledge, and its purpose is to achieve both a cleaning effect and a massage effect at a high level by an approach different from the conventional one, and excellent insertion into the back teeth. To provide a toothbrush.

  In order to achieve the above object, the toothbrush of the present invention includes a cleaning hair bundle formed by bundling a plurality of cleaning hairs on a head portion provided at a front end of a handle, and a plurality of massage hairs having a cross-sectional area smaller than the cleaning hair. A plurality of massage hair bundles are bundled, and the plurality of massage hair bundles are arranged in at least one row on the outer left and right sides of the head part, and the plurality of cleaning hair bundles are arranged on the head part. It is arranged in the front part, the rear part, and the central part between them, and at least in the central part of the head part, it is arranged inside the outermost left and right rows of massage hair bundles, and the head part The front portion of the head portion is arranged so as to spread outward from the central portion of the head portion.

According to the present invention, since the cleaning hair has a larger cross-sectional area than the massage hair, the cleaning hair bundle is higher in hair than the massage hair bundle. Since the massage hair bundle and the cleaning hair bundle are in the above-described characteristic arrangement, first, when the toothbrush is moved in the direction of pulling out from the mouth, the massage hair will fall too much at the front of the head portion. Can be suppressed. Thereby, the massage effect to a gum can fully be continued.
Further, when the toothbrush is moved in the mouth, the cleaning bristles at the front part of the head part can brush the teeth widely. Thereby, compared with the toothbrush which made the arrangement | positioning aspect of the cleaning bristle bundle the same in the front part and center part of a head part, a higher cleaning effect can be acquired. In particular, when the toothbrush is moved in the direction of insertion into the mouth, a wide range of brushing can be performed, and cleaning hair can be widely applied to the back teeth, so that the back teeth can be sufficiently cleaned.
In addition, when compared with a toothbrush having no massage hair, when the toothbrush is moved in the direction of insertion into the mouth, the cleaning hair bundle at the front portion of the head portion is likely to fall down by the massage hair bundle. Thereby, also about the insertability of the toothbrush to a back tooth, it can ensure in the balance of a cleaning effect and a massage effect.

  According to a preferred aspect of the present invention, the plurality of cleaning hair bundles may be arranged so as to spread outward from the central portion of the head portion even at the rear portion of the head portion.

  According to such an arrangement, as described above, when the toothbrush is moved in the direction of insertion into the mouth, the massage effect on the gums can be sufficiently maintained, and the toothbrush is moved in the direction of pulling out from the mouth. In this case, a wide range of brushing is possible and a cleaning effect can be obtained. In addition, when the toothbrush is moved in the direction in which the toothbrush is pulled out from the mouth, the massage hair bundle ensures that the cleaning hair bundle at the rear part of the head portion is easily collapsed. Accordingly, by arranging the plurality of cleaning hair bundles so as to spread outward from the central portion in both the front portion and the rear portion of the head portion, the massage effect, the cleaning effect, and the operability can be performed overall and synergistically. Can be improved.

  According to a preferred aspect of the present invention, the plurality of massage hair bundles may be arranged in at least two rows on the left and right sides of the head portion.

  According to this structure, since the hair with low fluff increases, in addition to enhancing the massage effect, the toothbrush can be moved smoothly. For example, when the toothbrush is moved in the direction in which it is inserted into the mouth, the cleaning hair bundle at the front portion of the head portion can be more easily tilted, so that the insertion into the back teeth can be further improved.

  Preferably, the cleaning hair bundle disposed at the front portion of the head portion includes at least one cleaning hair bundle disposed on the outermost line of the massage hair bundle or on the outer side of the extension line. Should be included.

  According to this configuration, when the toothbrush is moved in the direction of insertion into the mouth, the cleaning hair bundle at the front part of the head part is more likely to fall down to the rear side, so the insertability into the back teeth is significantly improved. . Moreover, the effect which suppresses that the massage hair falls down too much with the cleaning hair bundle of the front part of a head part at the time of moving a toothbrush in the direction pulled out from the inside of a mouth improves.

  Preferably, the plurality of cleaning hair bundles may be arranged on the inner side of the outermost left and right massage hair bundles at the front and rear portions of the head portion.

  According to this configuration, since all of the cleaning hair bundles are positioned inside the right and left outermost massage hair bundles, the massage effect is further improved. In addition, the ability to clean the back teeth is further improved.

  In order to achieve the above object, a toothbrush according to another aspect of the present invention includes a cleaning hair bundle formed by bundling a plurality of cleaning hairs in a hair transplantation region of a head portion provided at a front end of a handle, and crossing more than the cleaning hairs. A plurality of massage hair bundles each having a plurality of massage hairs each having a small area are bundled, and the plurality of massage hair bundles are arranged in at least one row on the left and right sides of the head part. If the ratio of the cleaning hair bundle is larger than the mass ratio of the massage hair bundle, and the hair transplant area is divided into three equal parts in the front-rear direction of the head part, the ratio of the cleaning hair bundle is larger than the ratio of the massage hair bundle in the front hair transplant area In the center flocking region, the proportion of the massage hair bundle is not less than the proportion of the cleaning hair bundle.

According to the present invention, as described above, when the toothbrush is moved in the direction in which the toothbrush is pulled out from the mouth, it is possible to suppress the massaging hair from falling too much with a relatively large number of cleaning hair bundles on the front side of the flocked region. Thereby, the massage effect to a gum can fully be continued.
Further, when the toothbrush is moved, relatively many cleaning hairs on the front side of the flocked area can brush the teeth widely. Thereby, the higher cleaning effect can be acquired compared with the toothbrush which made the ratio of the cleaning hair the same thing in the front side and center of a flocking area | region. In particular, when the toothbrush is moved in the direction of insertion into the mouth, a wide range of brushing can be performed, and cleaning hair can be widely applied to the back teeth, so that the back teeth can be sufficiently cleaned.
In addition, when compared with a toothbrush having no massage hair, when the toothbrush is moved in the direction of insertion into the mouth, the cleaning hair bundle on the front side of the flocked region is likely to fall down by the massage hair bundle. Thereby, also about the insertability of the toothbrush to a back tooth, it can ensure in the balance of a cleaning effect and a massage effect.

  According to a preferred aspect of the present invention, in the rear hair transplant region, the ratio of the cleaning hair bundle may be equal to or greater than the ratio of the massage hair bundle.

  According to this configuration, as described above, when the toothbrush is moved in the direction of insertion into the mouth, the massage effect on the gums can be sufficiently maintained, and when the toothbrush is moved in the direction of pulling out from the mouth In addition, a wide range of brushing is possible and a cleaning effect can be obtained. In addition, when the toothbrush is moved in the direction in which the toothbrush is pulled out from the mouth, the massage hair bundle ensures that the cleaning hair bundle on the rear side of the flocked area falls easily.

It is a top view of the toothbrush which concerns on embodiment. It is an enlarged plan view of the head part of the toothbrush of FIG. It is the end elevation cut | disconnected by the III-III line | wire of FIG. It is a figure for demonstrating the ratio of the hair | bristle bundle in the head part of the toothbrush of FIG. 1, (a) is the same figure as FIG. 2, (b) is an enlarged view of the cleaning hair | bristle bundle shown to (a). .

A toothbrush according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.
In the following description, the positional relationship such as front / rear / left / right used in relation to each part of the toothbrush is the front side and the back side in FIG. Assume that the position on the right side of the page is the left side and the right side, respectively. Therefore, with regard to the head part, the head part is located on the front side with respect to the handle. Further, the front-rear direction of the head part means the vertical direction of the head part, and the left-right direction of the head part means the horizontal direction or the width direction of the head part.

  As shown in FIG. 1, the toothbrush 1 includes a handle 2 and a head portion 3 provided at the front end of the handle 2. The handle 2 is a part used by the user to hold the toothbrush 1, and is formed longer in the front-rear direction than the head 3. The pattern body 2 and the head portion 3 are integrally molded using a polypropylene resin as a material. However, both may be formed by another synthetic resin, and may be formed by another body.

  As shown in FIG. 2, the head portion 3 has a flat plate shape in which the four corners of the rectangle are gently cut off in plan view, and the front end is slightly curved outward. The head portion 3 has a flocked surface 10 on the surface. A plurality of bottomed cylindrical flocking holes 12 are formed on the flocking surface 10 (see FIG. 3), and the plurality of flocking holes 12 are all formed in the same size.

  As shown in FIG. 2, a plurality of massage hair bundles 14 formed by bundling a plurality of massage hairs and a plurality of cleaning hair bundles 16 formed by bundling a plurality of cleaning hairs are implanted in the plurality of flock holes 12 respectively. Yes. The massage hair bundle 14 is softer against the tooth surface and gums than the cleaning hair bundle 16 and has a high massage effect, while the cleaning hair bundle 16 is more effective in removing plaque by brushing than the massage hair bundle 14 (cleaning effect). Is structured high. Massage hair and cleaning hair are made of the same material, but massage hair has a smaller cross-sectional area (thickness) than cleaning hair. For this reason, the massage hair bundle 14 has a lower hair than the cleaning hair bundle 16.

  The massage hair bundles 14 are indicated by white circles in FIG. 2, and are arranged in two rows on the left and right sides of the head portion 3, and one is arranged on an extension line between the two rows. More specifically, the massage hair bundle 14 is arranged in line symmetry with respect to an axis line passing through the center of the head portion 3, and is 5 5 in the front-rear direction along the linear side edge of the head portion 3 in the outermost row. In the inner row, four are arranged in the front-rear direction, and one is arranged behind the last one in each row so as to be positioned between these rows.

  The cleaning hair bundle 16 is indicated by a black circle in FIG. 2, and is disposed on the inner side of the left and right rows of massage hair bundles 14 on the outermost side. Further, the cleaning hair bundle 16 is disposed in line symmetry with respect to an axis line passing through the center of the head portion 3 and is disposed in the front-rear direction of the head portion 3. Specifically, a total of 15 cleaning hair bundles 16 are arranged in the front part 3a of the head part 3, a total of 6 in the rear part 3c, and a total of 8 in the central part 3b between them. In addition, the front part 3a of the head part 3 is a part including a mountain-shaped front end part having a slightly outwardly curved front end, and the rear part 3c of the head part 3 is a substantially inverted base whose upper base is longer than the lower base. It is a part including the rear end part of the shape, and the central part 3b of the head part 3 is a part between these, and is a rectangular part having a pair of straight left and right side ends.

  Here, in the central portion 3b, the cleaning hair bundles 16 are arranged in four columns in two columns. On the other hand, in the rear portion 3c, the cleaning hair bundles 16 are arranged in three vertical rows and two rows, and two vertical rows of the cleaning hair bundle 16 in the central portion 3b are arranged between the three vertical rows. An extension line exists. Accordingly, the cleaning hair bundle 16 is disposed so as to spread outward from the central portion 3b in the rear portion 3c.

  On the other hand, in the front portion 3a, the cleaning hair bundles 16 are arranged in horizontal four rows, and two, four, five, and four are arranged in order from the previous row, and are arranged in a staggered manner except for the front row. Yes. Further, in the front portion 3a, four cleaning hair bundles 16 are arranged on the extension line of the vertical two rows of the cleaning hair bundle 16 in the central portion 3b and one inside thereof, while the other eight are in the center. It arrange | positions on the outer side rather than the extension line | wire of the vertical 2 rows of the cleaning hair | bristle bundle 16 in the part 3b. Therefore, the cleaning hair bundle 16 is arranged so as to spread outside the central portion 3b also in the front portion 3a.

  In the front part 3a, two left and right cleaning hair bundles 16 are arranged on the front and rear two extension lines on the innermost two rows of the massage hair bundles 14, and further on the outer side. One cleaning hair bundle 16 is arranged for each. The outer left and right cleaning hair bundles 16 are located on a line in the front-rear direction passing through the massage hair bundle 14 at the tail end. Moreover, although the cleaning hair bundle 16 is arrange | positioned along the mountain-shaped outer edge at the above-mentioned mountain-shaped front end part in the head part 3, the massage hair bundle 14 is not arrange | positioned.

  As described above, the cleaning hair bundle 16 is disposed in a shape as shown by an arrow on the flocked surface 10 of the head portion 3 as a whole in plan view. In addition, the shape like this arrow is a shape in which the arrow tip and the arrowhead are spread outside the portion of the handle between them. Moreover, the massage hair bundle 14 is arrange | positioned at the both sides so that a part (here 15 pieces in total) of the some cleaning hair bundle 16 may be pinched | interposed.

  Here, it is as follows when the viewpoint of the ratio of the hair | bristle bundle in the head part 3 is considered using FIG. First, since there are 20 massage hair bundles 14 and 29 cleaning hair bundles 16, the ratio of the cleaning hair bundles 16 is greater than the ratio of the massage hair bundles 14 in the head portion 3. Next, paying attention to the flocked region 20 of the head portion 3 and dividing the flocked region 20 into three parts in the front-rear direction of the head portion 3, the proportion of the cleaning hair bundle 16 is the proportion of the massage hair bundle 14 in the front flocked region 20a. The ratio of the massage hair bundle 14 is greater than or equal to the ratio of the cleaning hair bundle 16 in the central hair transplantation area 20b, and the ratio of the cleaning hair bundle 16 is greater than or equal to the ratio of the massage hair bundle 14 in the rear hair implantation area 20c. It has become. Here, the flocked region 20 refers to a region surrounded by an annular line connecting the outer edges of the flocked holes 12 located on the outermost periphery formed on the flocked surface 10. The front boundary of the flocked region 20 is a tangent line passing through the front edges of the two flocked holes 12 on the front end side, and the rear boundary of the flocked region 20 is the rear edge of the three flocked holes 12 on the rear end side. Tangent line passing through As for the hair bundles on the lines 22 and 24 divided into three equal parts, for example, as shown in FIG. 4B, the portion 16a on the front side of the line 22 in the cleaning hair bundle 16 on the line 22 is the front side. What is necessary is just to calculate as the part 16b which exists in the flocking area | region 20a of this, and is behind the line 22 exists in the center flocking area | region 20b. The areas of the plurality of flock holes 12 are all the same size, and when calculating the ratio of the hair bundles, the cross-sectional area (hair bundle diameter) of the massage hair bundle 14 and the cross-sectional area of the cleaning hair bundle 16 are mutually equal. It can be considered that it is the same as the area of the flock hole 12.

  According to the toothbrush 1 of the present embodiment described above, the massage hair bundles 14 are arranged on the outer left and right sides, the cleaning hair bundle 16 is arranged on the inner side of the outermost row of massage hair bundles 14, and the head portion. In the front part 3a and the rear part 3c of 3, the cleaning hair | bristle bundle 16 is expanded and arrange | positioned rather than the center part 3b. By adopting such an arrangement, the toothbrush 1 has both a cleaning effect and a massage effect at a high level and is excellent in insertability into the back teeth.

  Specifically, when the toothbrush 1 is moved in the direction in which the toothbrush 1 is pulled out from the mouth, it is possible to prevent the massage hair hitting the gums from falling too forward by the cleaning hair bundle 16 of the front portion 3a. On the other hand, when the toothbrush 1 is moved in the direction of insertion into the mouth, it is possible to prevent the massage hair hitting the gums from falling too far backward by the cleaning hair bundle 16 of the rear portion 3c. Therefore, the massage effect on the gums can be sufficiently sustained. That is, the widened portions of the cleaning hair bundle 16 on the front side and the rear side do not impair the massage effect on the gums, but rather function in the direction of increasing the massage effect by the massage hair. In addition, the cleaning effect of massage hair is usually difficult to obtain, and by suppressing the massage hair from falling too much during these operations, the cleaning effect of not only cleaning hair but also massage hair can be obtained, and a better cleaning effect Is played.

  Further, when the toothbrush 1 is moved in the direction of pulling out from the mouth and the direction of insertion into the mouth, the cleaning bristles of the front portion 3a of the head portion 3 can brush the teeth widely. Thereby, compared with the toothbrush which made the arrangement | positioning aspect of the cleaning bristle bundle 16 the same in the front part 3a (or rear part 3c) and the center part 3b of the head part 3, the outstanding scraping effect is exhibited, and it is high A cleaning effect can be obtained. In particular, since the cleaning hair bundle 16 is widely distributed in the front portion 3a, the cleaning hair can be applied to the back teeth widely and sufficiently cleaned.

  In addition, when compared with a toothbrush having no massage hair, for example, when the toothbrush 1 is moved in the direction of insertion into the mouth, the cleaning hair bundle 16 of the front portion 3a of the head portion 3 is more likely to fall by the massage hair bundle 14. Therefore, the excellent insertability of the toothbrush 1 into the back teeth can be ensured while achieving both a cleaning effect and a massage effect. Further, when pulling out the toothbrush 1 from the mouth, the cleaning hair bundle 16 of the rear portion 3c of the head portion 3 is likely to fall down by the massage hair bundle 14, and as a whole, the user feels that the operability of the toothbrush 1 in the mouth is good. it can.

  In addition, since the toothbrush 1 is contacting the tooth surface alternately in the vertical direction in the longitudinal direction near the center of the head part 3, the toothbrush 1 is excellent also in the cleaning effect at the time of moving so that a circle may be drawn in a mouth. Needless to say.

  Further, the cleaning hair bundle 16 is disposed on the front side of the two left and right massage hair bundles 14 in the outermost row of the massage hair bundles 14, and the cleaning hair bundle 16 and the massage hair bundle 14 partially overlap in the front-rear direction. Are arranged as follows. In this way, the massage hair bundle 14 and the cleaning hair bundle 16 are arranged so that at least a part thereof overlaps in the front-rear direction, so that the cleaning hair bundle 16 of the front portion 3 a of the head portion 3 is moved by the massage hair bundle 14. It becomes easier to fall down and the insertion into the back teeth is enhanced. In addition, when the toothbrush 1 is moved in the direction in which it is pulled out from the mouth, it is possible to further suppress the massaging hair from falling down by the cleaning hair bundle 16 of the front portion 3a of the head portion 3. Can last long enough. Furthermore, since it is possible to effectively suppress the massaging hair from falling down during brushing, the cleaning effect can be improved.

  The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to these specific examples. In other words, those specific examples that have been appropriately modified by those skilled in the art are also included in the scope of the present invention as long as they have the characteristics of the present invention. For example, each element included in each of the specific examples described above and its arrangement, material, condition, shape, size, number, and the like are not limited to those illustrated, and can be changed as appropriate.

  For example, the rear portion 3c of the head portion 3 can be arranged without spreading the cleaning hair bundle 16 outward than the central portion 3b. However, the above-described arrangement can improve the massage effect, cleaning effect, and operability of the toothbrush 1 as a whole and synergistically.

  It is also possible to arrange only one row of massage hair bundles 14 on the left and right sides of the head portion 3. However, the above-described arrangement not only can enhance the massage effect, but also has a lot of hair with low bristles, so that the toothbrush 1 can be moved smoothly and the insertion into the back teeth can be improved. This is advantageous.

  Furthermore, it is also possible to arrange the cleaning hair bundle 16 on the extended line of the left and right rows of massage hair bundles 14 on the outermost side in at least one of the front portion 3a and the rear portion 3c of the head portion 3. That is, the cleaning hair bundle 16 in at least one of the front portion 3a and the rear portion 3c of the head portion 3 can be arranged on the same row as the left and right massage hair bundles 14 or on the inner side thereof. . However, the above-described arrangement (all the cleaning hair bundles 16 are arranged inside the outermost left and right massage hair bundles 14) is advantageous in that the massage effect and back teeth cleaning performance can be improved. The cleaning hair bundle 16 arranged on the same row as the outermost right and left massage hair bundles 14 in at least one of the front part 3a and the rear part 3c of the head part 3 has a balance with the massage effect by the massage hair bundles. The number of rows in the row is less than that of the massage hair bundle 14, and is at most 1 to 2.

  When the cross-sectional area (thickness) of the brush hairs constituting the hair bundle is three or more, the hair bundle composed of the brush hair with the smallest cross-sectional area is a massage hair bundle, and the brush hair with the largest cross-sectional area The hair bundle consisting of is a cleaning hair bundle, and the hair bundle consisting of brush hairs of the cross-sectional area between them is a massage hair bundle if it is closer to the minimum cross-sectional area than the maximum cross-sectional area, and vice versa By classifying as a cleaning hair bundle, as a result, it is possible to classify into two types of massage hair bundle and cleaning hair bundle.

  1: Toothbrush, 2: Pattern body, 3: Head part, 3a: Front part, 3b: Center part, 3c: Rear part, 14: Massage hair bundle, 16: Cleaning hair bundle, 20: Flocked area

Claims (7)

In the head part provided at the front end of the handle,
A plurality of cleaning hair bundles formed by bundling a plurality of cleaning hairs, and a plurality of massage hair bundles formed by bundling a plurality of massage hairs having a cross-sectional area smaller than the cleaning hair,
The plurality of massage hair bundles are toothbrushes arranged in at least one row on the outer left and right sides of the head part,
The plurality of cleaning hair bundles are arranged at the front portion, the rear portion, and the central portion between the head portions, and at least in the central portion of the head portion, the outermost left and right rows of massage hair bundles A toothbrush that is disposed on the inner side of the head portion and that is disposed on the front portion of the head portion so as to spread outward from the central portion of the head portion.   2. The toothbrush according to claim 1, wherein the plurality of cleaning hair bundles are arranged so as to spread outward from a central portion of the head portion even at a rear portion of the head portion.   The toothbrush according to claim 1 or 2, wherein the plurality of massage hair bundles are arranged in at least two rows on the left and right sides of the head portion.   The cleaning hair bundle disposed at the front portion of the head portion includes at least one cleaning hair bundle disposed on the outermost line of the massage hair bundle or on the outer side of the extension line. The toothbrush according to claim 3, which is included.   5. The plurality of cleaning hair bundles according to claim 1, wherein the plurality of cleaning hair bundles are arranged on the inner side of the outermost left and right massage hair bundles at the front and rear portions of the head portion. Toothbrush. In the flocked area of the head part provided at the front end of the handle,
A plurality of cleaning hair bundles formed by bundling a plurality of cleaning hairs, and a plurality of massage hair bundles formed by bundling a plurality of massage hairs having a cross-sectional area smaller than the cleaning hair,
The plurality of massage hair bundles are toothbrushes arranged in at least one row on the outer left and right sides of the head part,
In the head portion, the cleaning hair bundle ratio is larger than the massage hair bundle ratio,
When the hair transplantation area is divided into three equal parts in the front-rear direction of the head part,
In the front flocking area, the cleaning hair bundle ratio is greater than the massage hair bundle ratio,
A toothbrush in which the proportion of massage hair bundles is greater than or equal to the proportion of cleaning hair bundles in the central flocking region. When the hair transplantation area is divided into three equal parts in the front-rear direction of the head part,
The toothbrush according to claim 6, wherein the ratio of the cleaning hair bundle is greater than or equal to the ratio of the massage hair bundle in the rear hair transplant region.