JP2001340139A - Tooth brush - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tooth brush which enhances the brushing effect on interdental parts and cervical parts and makes it possible to easily obtain the sufficient brushing effect on molars. SOLUTION: Many staples 12 of the tooth brush 10 formed by longitudinally and transversely planting many staples 12 bundled with bristles 11 to a flocking block 14 consist of front end side staple groups 12A existing on the front end side in the longitudinal direction X of the flocking block 14 and rear end side staple groups 12B existing on the rear end side in the longitudinal direction X. The front end side staple groups 12A are formed at the same height in the front end position of the tips of the adjacent staples in the direction perpendicular to the longitudinal direction X of the flocking block 14, and the rear end side staple groups 12B are so formed that the front end positions of the tips of their outer side staples 12b are higher than the front end positions of the tips of inner side staples 12b' and the front end positions of the tips of the staples 12a of the front end side staple groups 12A. The ratio of the planting length (m) of the front end side staple groups 12A to the planting length (n) of the many staples 12 in the longitudinal direction X of the flocking block 14 is 0.15 to 0.75.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toothbrush having a large number of bristle bundles, which are bundled with bristles, planted vertically and horizontally on a flocking table.

[0002]

2. Description of the Related Art In order to enhance the brushing effect of the interdental region and the cervical region, the hairs constituting an outer row of hair bundles out of a large number of hair bundles arranged vertically and horizontally on a flocking table. Japanese Patent Laid-Open No. 2000-14 discloses a toothbrush in which the tip end position of the bundle is higher than the tip end position of the bristle bundle constituting the inner bristle row.
No. 451.

[0003] However, according to the conventional toothbrush in which the bristle bundle of the outer bristle row is raised, when brushing the back teeth, the bristle bundle of the outer bristle row with the raised bristle has a force for scraping the surface of the back teeth. Since it is not possible to obtain a sufficient amount, and it is difficult for the hair bundles of the inner bristle row to reach the surface of the back teeth because the bristle bundles of the outer bristle row are in the way, it is difficult to perform efficient brushing of the back teeth. Was.

An object of the present invention is to provide a toothbrush capable of enhancing a cleaning effect on interdental portions and a cervical region and easily obtaining a sufficient cleaning effect on back teeth.

[0005]

According to the present invention, there is provided a toothbrush having a plurality of bristle bundles bundled vertically and horizontally on a flocking table, wherein the plurality of bristle bundles are arranged at a distal end of the flocking table in a longitudinal direction. And a rear end hair bundle group located on the longitudinal rear end side of the flocking table, wherein the distal hair bundle group is adjacent in a direction perpendicular to the longitudinal direction of the flocking table. In the rear end-side hair bundle group, the tip end positions of the hair bundles constituting the outer hair bundle row are the same as the hairs constituting the inner hair bundle row. It is higher than the tip position of the tip of the bundle and the tip position of the tip of the hair bundle that constitutes the tip side hair bundle group, and the length of the plurality of hair bundles in the longitudinal direction of the flocking table is set with respect to the setting length. To provide a toothbrush in which the ratio of the implantation length of the tip side hair bundle group is 0.15 to 0.75. Ri, are those that have achieved the above objects.

Here, the implantation length of the plurality of hair bundles is determined by the distance between the front end surface of the hair bundle located at the front end in the longitudinal direction of the hair implantation table and the rear end surface of the hair bundle located at the rear end. This is the length along the longitudinal direction. The implantation length of the tip side hair bundle group,
The length along the longitudinal direction between the distal end surface of the hair bundle located at the distal end of the distal hair bundle group and the rear end surface of the hair bundle located at the rear end of the distal hair bundle group in the longitudinal direction of the flocking table. That's it.

By setting the ratio of the length of the set of hair bundles on the distal end side to the length of the set of hair bundles of 0.15 to 0.75, efficient cleaning of the back teeth is facilitated. In addition, an appropriate brushing effect on the interdental region and the cervical region can be obtained. It is further preferable that the ratio of the planting length of the tip side hair bundle group to the planting length of the plurality of hair bundles is 0.2 to 0.5.

In the toothbrush of the present invention, the average tip end position of the bristle bundle forming the outer bristle row of the rear end bristle group and the average bristle tip of the bristle bundle forming the distal end bristle group may be improved. The difference from the tip position is 0.3 to 4.0 mm, and the average tip end position of the bristle bundles forming the outer bristle row of the rear end bristle group and the bristle bundle forming the inner bristle row are 0.3 difference from average tip position
It is preferably about 1.5 mm.

The difference between the average tip end position of the hair bundles constituting the outer hair bundle row and the average tip end position of the hair bundles constituting the tip end hair bundle group is 0.3 to 4.0 mm. By doing so, it is possible to improve the reach of the bristle tip to the interdental area, and it is easy to polish the back teeth. The difference between the average tip end position of the hair bundles constituting the outer hair bundle row and the average tip end position of the hair bundles constituting the tip side hair bundle group may be 0.5 to 2.0 mm. More preferred.

On the other hand, the difference between the average tip end position of the hair bundles constituting the outer hair bundle row and the average tip end position of the hair bundles constituting the inner hair bundle row is 0.3 to 1.5 mm. By doing so, the brushing effect of the interdental part and the cervical part is improved, and even if the bristle hits the gum when brushing the teeth with force, it does not hurt. The difference between the average tip position of the hair bundles constituting the outer hair bundle row and the average tip position of the hair bundles constituting the inner hair bundle row may be 0.5 to 1.0 mm. preferable.

Further, in the toothbrush of the present invention, it is preferable that the flocking table has a tip upper part which is raised one step on the tip side, and the tip hair bundle group is implanted in the tip upper part. .

[0012] According to the toothbrush of the present invention, the tip end position of the bristle bundle forming the outer bristle row of the rear end bristle group is higher than the tip end position of the bristle bundle forming the inner bristle bundle row. Since it is high, the bristle can be securely inserted into the interdental region and the cervical region during use, and the brushing effect is enhanced. Further, since the tip side hair bundle group lower in height than the outer row of hair bundles of the rear end side hair bundle group is provided in the above-described predetermined ratio region in the longitudinal direction of the flocking table, the stiffness is strong and hard. The bundle makes it possible to efficiently sweep the surface of the posterior teeth with a sufficient scraping force.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described. The toothbrush 10 according to the first embodiment of the present invention includes:
As shown in FIGS. 1 to 2A to 2C, a gripping portion (not shown), a flocking table 14, and a neck portion 15 for connecting them are provided.
And a plurality of tufts 12 formed by bundling a plurality of bristles 11 in a plurality of tufts formed in the tufting table 14 of the toothbrush body.

The toothbrush body is made of, for example, polypropylene,
It is made of a synthetic resin such as ABS resin, and has a large number of flocked holes formed in the vertical and horizontal directions on the flat surface of the flocked portion 14.
Each flocking hole has a circular cross section of, for example, 1.6 mm in diameter, has a depth of, for example, 2.0 to 4.0 mm, and is provided vertically and horizontally at a pitch of 0.5 to 3.5 mm. The hair bundle 12 to be implanted in the hair implantation hole can be formed by a method of driving a flat wire,
Each is implanted in each flocking hole by a method of fusing with heat or the like.

The bristle 11 constituting each hair bundle 12 is
It is a filament material having a thickness of, for example, 0.2 mm (8 mil) made of a synthetic resin such as nylon or a natural material such as pig hair. Is formed.

According to the first embodiment, a large number of hair bundles 12 implanted in the hair implantation holes are provided with the tip end hair bundle group 12A located in the distal end region A of the hair implantation table 14 in the longitudinal direction X and the hair implantation. Stand 14
And the rear end side hair bundle group 12B located on the rear end side in the longitudinal direction X. In addition, the length along the longitudinal direction X between the front end face of the hair bundle 12a located at the front end in the longitudinal direction X of the many hair bundles 12 and the rear end face of the hair bundles 12b and 12b 'located at the rear end. The implantation length n of a large number of hair bundles, the distal end face of the hair bundle 12a located at the distal end of the distal hair bundle group 12A in the longitudinal direction X, and after the hair bundle 12a located at the rear end of the distal hair bundle group 12A. When the length along the longitudinal direction X between the end face and the end face is defined as the implantation length m of the tip side hair bundle group, the ratio of m to n is 0.
25.

The tip-side hair bundle group 12A has a total of six bristles provided in two places in the first row and four places in the second row on the tip side, which are connected in a direction perpendicular to the longitudinal direction X of the flocking table 14. Bundle 12a
Composed of Each bristle bundle 12a has a hair length of 9 mm on average from the lower end portion 14b on the rear end side of the flocking table 14 (8 mm on average from the upper end portion 14a of the flocking table 14 on the distal end side).
That is, the tips of the tips of adjacent hair bundles 12a in each row have the same height. According to the first embodiment, the four rows of hair bundles 12a in the second row are four rows of hair bundles 12b, 12 along the longitudinal direction X of the rear end side hair bundle group 12B.
On the same row as b ′, the first row of hair bundles 12a is arranged on the same row as the two inner rows of hair bundles 12b ′ of the rear end hair bundle group 12B.

The rear end hair bundle group 12B is composed of four rows of hair bundles 12b and 12b 'connected in the longitudinal direction X of the flocking table 14, and these hair bundles 12b and 12b' are arranged at four positions in each row. Are provided. Here, four rows of hair bundles 12b, 12b '
Outer hair bundles 12b constitute two outer hair bundle rows (outer hair bundle rows), and inner hairs constitute two inner hair bundle rows (inner hair bundle rows). The bundle 12b '. Each outer bristle bundle 12b has a hair height of 9.5 mm on average from the lower portion 14b of the flocking table 14, and each inner bristle bundle 12b 'has a hair height of 9mm on average from the lower portion 14b of the flocking table 14. I have.

Therefore, according to the first embodiment, the average hair tip position of the outer hair bundle 12b of the rear hair bundle group 12B and the average hair tip position of the hair bundle 12a of the front hair bundle group 12A are determined. Is 0.5 mm. The difference between the average tip position of the outer bristle bundle 12b of the rear end bristle bundle group 12B and the average tip position of the inner bristle bundle 12b 'is 0.5 m.
m.

Further, according to the first embodiment, the height 1 mm crossing between the first row and the second row of hair bundles 12b and 12b 'on the front end side in the longitudinal direction X of the rear end hair bundle group 12B. Step 1 of
6, the flocking table 14 is divided into an upper end portion 14 a on the front end side and a lower end portion 14 b on the rear end side. Tip side upper section 14a
The first row of hair bundles 12b on the distal side in the longitudinal direction X of the hair bundles 12a of the front hair bundle group 12A and the rear hair bundle group 12B
2b 'are implanted, and the remaining hair bundles 12b and 12b' of the rear end hair bundle group 12B are implanted in the rear end lower step portion 14b.

Further, according to the first embodiment, at least a part of the ends of the bristle 11 constituting each bristle bundle is subjected to a beading process, thereby removing the plaque at the back teeth and the interdental portion. Has been promoted. In addition, by setting the implantation length n of a large number of hair bundles to be 1.4 to 2.3 mm, the ease of polishing the back teeth is improved. Furthermore, the first
According to the toothbrush 10 of the embodiment, the neck portion 15 and the grip portion are provided with a bending structure that bends at a predetermined curvature, thereby improving the convenience in brushing the teeth.

According to the toothbrush 10 of the present embodiment, it is possible to enhance the cleaning effect on the interdental portion and the cervical portion and easily obtain a sufficient cleaning effect on the back teeth. That is, the tip end position of the outer bristle bundle 12b forming the outer bristle bundle row of the rear end side bristle bundle group 12B is higher than the tip end position of the inner bristle bundle 12b 'forming the inner bristle bundle row. As a result, the bristle 11 can be reliably inserted into the interdental region and the cervical region during use, and the brushing effect is enhanced. Further, the front-end-side hair bundle group 12A, which is lower in height than the outer-side hair bundle row of the rear-end-side hair bundle group 12B, has a height of 0.
Since it is provided with the implantation length m at a rate of 25, the bristle bundle 12a having a strong stiffness enables the surface of the back teeth to be efficiently cleaned with a sufficient scraping force.

The hair bundle 12a of the tip side hair bundle group 12A
Is planted on the tip upper part 14a, which is one step higher than the hair placement table 14, so that the bristle length from the tip upper part 14a can be further shortened (8 mm on average from the tip upper part 14a). As a result, the surface of the back teeth can be more effectively brushed as the stiffer and harder hair bundle 12a.

FIGS. 3A to 3C show toothbrushes 17, 18, and 19 according to the second to fourth embodiments of the present invention. 3A to 3C, the bold line crossing the upper end portion of the rear end hair bundle group 12B indicates the inner hair bundle 12B.
This represents the position of the hair tip of b '. The toothbrush 17 of the second embodiment shown in (a) has three rows of bristle bundles 12 on the distal end side, which are continuously arranged in a horizontal direction perpendicular to the longitudinal direction of the flocking table 14, among a large number of bristle bundles 12 arranged vertically and horizontally. Is the hair bundle 12a of the tip side hair bundle group 12A.
The hair bundles 12 in the rear end side five rows are hair bundles 12b and 12b 'of the rear end side hair bundle group 12B. The toothbrush 18 of the third embodiment shown in (b) has a configuration in which the bristle bundles 12a of the distal end side hair bundle group 12A in the three rows on the distal side continuously arranged in the lateral direction are sequentially reduced in bristle height toward the distal end row. Things. The toothbrush 19 of the fourth embodiment shown in (c) has the bristle bundles 12b, 12b 'of the rear bristle bundle group 12B in the five rear-end rows arranged in the lateral direction.
Also, the height of the hairs is gradually reduced in the row on the tip side. In addition, the 2nd to 4th shown in FIGS.
According to the embodiment, the flocking table 14 has a flat surface without any step. These toothbrushes 17,1
8 and 19, the toothbrush 10 of the first embodiment is also used.
It has substantially the same operation and effect.

The present invention is not limited to the above embodiments, and various changes can be made. For example, each hair bundle 1
It is not always necessary that the hair bundles 2 have the same bundle diameter, and the bundle diameter of the bundle of hairs of the distal end bundle can be increased. Also,
It is not always necessary to arrange a large number of hair bundles vertically and horizontally like a grid pattern, and they may be arranged in a staggered pattern, for example.

[0026]

EXAMPLES Hereinafter, the toothbrush of the present invention will be described in more detail with reference to Examples and Comparative Examples.

[Examples 1 to 3] The toothbrush 10 has substantially the same structure as the toothbrush 10 of the first embodiment, and has a tip side hair with respect to the installation length n of the large number of hair bundles 12 implanted on the hair implantation table 14. Bundle group 1
The ratio m / n of the implantation length m of 2A, the average hair tip position of the outer hair bundle 12b of the rear hair bundle group 12B, and the front hair bundle group 12
The difference dm between the average hair tip position of the hair bundle 12a of A and the difference between the average hair tip position of the outer hair bundle 12b of the rear hair bundle group 12B and the average hair tip position of the inner hair bundle 12b '. Is the toothbrush of Example 1 in which dn has the values shown in Table 1 (see FIG. 4A). A toothbrush having the same configuration as that of the toothbrush of the first embodiment except that the bristle bundle 12 is planted on a flat flocking table 14 having no step, the m / n, dm, and dn each being a value shown in Table 1 is used. 2 toothbrush (Fig. 4
(B)). A toothbrush having a configuration substantially similar to that of the toothbrush 17 of the second embodiment and having m / n, dm, and dn as shown in Table 1 was used as the toothbrush of Example 3 (FIG. 4).
(C)). The toothbrushes of Examples 1 to 3 were evaluated for the brushing effect between the back teeth and between the teeth by the method described later.
Table 1 shows the results of the evaluation.

[Comparative Example 1] A hair bundle constituting the hair bundle on the tip side has a configuration shown in FIG. 4D in which only one row of hair bundles on the tip side, and m / n, dm and dn are Each toothbrush having the value shown in Table 1 was used as the toothbrush of Comparative Example 1. In the toothbrush 10 of the first embodiment, the tip of the outer bristle bundle 12b is moved to the bristle bundle 12a and the inner bristle bundle 1 of the distal bristle bundle group 12A.
The toothbrush of Comparative Example 2 was provided with the configuration shown in FIG. 4E aligned at the tip end of the bristles 2b 'and having m / n, dm, and dn as shown in Table 1, respectively. The toothbrushes of Comparative Examples 1 and 2 were evaluated for the effect of sweeping back teeth and intertooth by the method described later. Table 1 shows the results of the evaluation.

[0029]

[Table 1]

[Evaluation of brushing effect between back teeth and between teeth] Thirty male and female panelists were actually brushed with the toothbrushes of Examples 1 to 3 and the toothbrushes of Comparative Examples 1 and 2,
A hearing survey was conducted. The back teeth, interdental area, and cervical area are easy to polish (5 points) and slightly easy to polish (4 points).
Points), normal (3 points), slightly difficult to polish (2 points), and difficult to polish (1 point) were given a score, and the average value was calculated. The survey results were evaluated as ○ (3.5 or more), △ (2.
5 to 3.4) and x (2.4 or less), and the cleaning effect was evaluated.

From the evaluation results shown in Table 1, it was found that the toothbrushes of Examples 1 to 3 according to the present invention had an excellent brushing effect on any of the interdental, cervical and back teeth. I do.

[0032]

According to the toothbrush of the present invention, it is possible to enhance the cleaning effect on the interdental region and the cervical region and easily obtain a sufficient cleaning effect on the back teeth.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main part of a toothbrush according to a first embodiment of the present invention.

2A is a schematic plan view of the toothbrush according to the first embodiment of the present invention, FIG. 2B is a schematic side view of FIG. 2A as viewed from below, and FIG. It is the schematic back view seen from the right side.

FIGS. 3A to 3C are schematic side views of toothbrushes according to second to fourth embodiments of the present invention.

FIG. 4A is a schematic side view of the toothbrush according to the first embodiment,
(B) is a schematic side view of the toothbrush of Example 2, (c) is a schematic side view of the toothbrush of Example 3, (d) is a schematic side view of the toothbrush of Comparative Example 1, and (e) is a comparison. It is a schematic side view of the toothbrush of Example 2.

[Explanation of symbols]

 10, 17, 18, 19 Toothbrush 11 Bristle 12 Hair bundle 12A Hair bundle on the tip side 12a Hair bundle (hair bundle on the hair bundle on the tip side) 12B Hair bundle on the back end 12b Outer hair bundle 12b 'Inner hair bundle 14 Hair transplantation Table 14a Front end upper step 14b Rear end lower step 15 Neck 16 Step difference X Longitudinal direction of flocking table

Claims (3)

[Claims] 1. A toothbrush in which a number of bristle bundles obtained by bundling bristles are planted vertically and horizontally on a flocking table, wherein the plurality of bristle bundles are a group of distal-side bristle bundles located at a longitudinal end side of the flocking table. And a rear-end hair bundle group located on the longitudinal rear end side of the flocking table, wherein the distal-side hair bundle group is a tip end position of a hair bundle adjacent in a direction perpendicular to the longitudinal direction of the flocking table. The rear end side hair bundle group, the tip end position of the hair bundle constituting the outer hair bundle row, the tip end position of the hair bundle constituting the inner hair bundle row, and The tip-side hair bundle group is placed higher than the tip end position of the hair bundle constituting the tip-side hair bundle group, and the tip-side hair bundle group is implanted with respect to the implantation length of the plurality of hair bundles in the longitudinal direction of the flocking table. A toothbrush having a length ratio of 0.15 to 0.75. 2. The difference between the average tip end position of the hair bundles forming the outer hair bundle row of the rear end hair bundle group and the average tip end position of the hair bundles forming the front end hair bundle group. 0.3-4.0mm
Wherein the difference between the average tip end position of the hair bundles forming the outer bristle row and the average tip end position of the hair bundles forming the inner bristle row of the rear end side hair bundle group is 0.3 to The toothbrush according to claim 1, which is 1.5 mm. 3. The toothbrush according to claim 1, wherein the flocking table has a tip upper part which is raised one step on the tip side, and the tip hair bundle group is implanted in the tip upper part. .