CN107635432B - Tooth brush - Google Patents
Tooth brush Download PDFInfo
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- CN107635432B CN107635432B CN201680033780.7A CN201680033780A CN107635432B CN 107635432 B CN107635432 B CN 107635432B CN 201680033780 A CN201680033780 A CN 201680033780A CN 107635432 B CN107635432 B CN 107635432B
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- Prior art keywords
- tuft
- tufts
- toothbrush
- hair
- brush
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Classifications
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- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46B—BRUSHES
- A46B9/00—Arrangements of the bristles in the brush body
- A46B9/02—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups
- A46B9/04—Arranged like in or for toothbrushes
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- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46B—BRUSHES
- A46B9/00—Arrangements of the bristles in the brush body
- A46B9/02—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups
- A46B9/028—Bristle profile, the end of the bristle defining a surface other than a single plane or deviating from a simple geometric form, e.g. cylinder, sphere or cone
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- A—HUMAN NECESSITIES
- A46—BRUSHWARE
- A46B—BRUSHES
- A46B2200/00—Brushes characterized by their functions, uses or applications
- A46B2200/10—For human or animal care
- A46B2200/1066—Toothbrush for cleaning the teeth or dentures
Abstract
The invention provides a toothbrush which can accurately clean the gaps between teeth without causing uneasiness to gum pain during operation. The toothbrush (10) of the present invention is characterized by comprising a head part (16) which is circular in a plan view and has a 1 st implantation hole (19A) and a plurality of 2 nd implantation holes (19B ) which are arranged around the 1 st implantation hole (19A) and have a shape larger than that of the 1 st implantation hole (19A) on a implantation surface (16 a); a 1 st hair bundle (14A) planted in the 1 st planting hole (19A); a plurality of bundles of 2 nd hair bundles (14B) planted in the respective 2 nd planting holes (19B ); the top end of the 1 st tuft (14A) protrudes from the top ends of the plurality of 2 nd tufts (14B).
Description
Technical Field
The present invention relates to toothbrushes.
The present application claims priority based on japanese patent application No. 2015-119231 filed in japan on 12/6/2015 and the contents of which are incorporated herein by reference.
Background
As an auxiliary tool for finely brushing "the junction of teeth and gums", a so-called single tuft/single bundle (one tuft) toothbrush is used. This is advantageous in that, since the brush portion is constituted by only one bundle of bristles, the interference of the brush head portion in the oral cavity is less as compared with a conventional toothbrush, and the bristle tips can be made to accurately hit a desired place.
Conventionally, the following techniques have been disclosed (patent document 1): in a general toothbrush, in order to improve the cleaning performance of interdental spaces, a tuft structure similar to that of a single tuft is formed by a central tuft and peripheral tufts inclined inward so as to surround the central tuft. Further, a toothbrush is disclosed which includes a single bundle of bristles on the distal end side of a bristle-implanted portion and a normal assembly of a plurality of bundles of bristles on the rear side (patent document 2).
[ Prior art documents ]
[ patent document ]
Patent document 1: japanese patent laid-open No. 2008-142371
Patent document 2: japanese patent laid-open publication No. 2011-83462
Disclosure of Invention
[ problems to be solved by the invention ]
In the conventional single-tuft toothbrush, since the brush portion is composed of only one tuft, the "pressure on the gum" of the tufts is inevitably locally applied as a result, as compared with the conventional toothbrush.
In particular, in order to avoid pain, bleeding, and the like during cleaning, periodontal disease patients tend to prefer a toothbrush that does not provide a feeling of contact such as stimulation to the gums as much as possible.
Further, since the single-bundle toothbrush is difficult to interfere with the inside of the oral cavity because the brush head portion is compact, it is difficult to sense where the brush (bristle bundle) of the brush head portion is hit during operation, as compared with a general toothbrush. Therefore, it is very difficult to accurately bring the "sharp brush" into contact with the cleaning site without causing discomfort to the gum.
The present invention has been made in view of the above circumstances, and an object thereof is to provide a toothbrush which can accurately clean gaps between teeth without causing discomfort to the gums during operation.
[ means for solving problems ]
A toothbrush according to an embodiment of the present invention includes a brush head portion for implanting a plurality of tufts on a bristle-implanting surface, and a handle portion extending from the brush head portion; a brush head portion on the bristle surface, which has a 1 st tuft and a plurality of 2 nd tufts arranged around the 1 st tuft and having a diameter larger than that of the 1 st tuft, and which is circular in a plan view; the top end of said 1 st tuft protrudes beyond the top ends of said plurality of 2 nd tufts. Here, the circular shape in plan view means a shape of an approximate perfect circle excluding an elliptical shape, and includes a shape that is not a perfect circle due to the influence of the machining accuracy.
A toothbrush of an embodiment of the present invention may be as follows: the plurality of 2 nd tufts are arranged concentrically with respect to the 1 st tuft as a center, and the plurality of 2 nd tufts are inclined toward the 1 st tuft with respect to a normal direction of the hair-setting surface.
A toothbrush of an embodiment of the present invention may be as follows: the inclination angle of the 2 nd hair bundle relative to the normal direction of the hair implanting surface is less than 10 degrees.
A toothbrush of an embodiment of the present invention may be as follows: the bristle length of the 2 nd tuft becomes longer gradually from the outer side of the head portion toward the 1 st tuft.
A toothbrush of an embodiment of the present invention may be as follows: the 1 st tuft is implanted by inserting a flat wire (flat plate) sandwiched between two-folded tufts into a 1 st implantation hole provided on the implantation surface, the 2 nd tuft is implanted by inserting a flat wire sandwiched between two-folded tufts into a 2 nd implantation hole provided on the implantation surface, and the 1 st tuft and the 2 nd tuft are provided with a difference in hair length between a 1 st half tuft and a 2 nd half tuft formed by sandwiching the flat wire.
A toothbrush of an embodiment of the present invention may be as follows: the diameter of the 2 nd planting hole is more than 2mm and less than 3.5 mm.
A toothbrush of an embodiment of the present invention may be as follows: the distance between the edges of the closest implanted hair holes in the 1 st implanted hair hole and the plurality of 2 nd implanted hair holes is more than 0.4mm and less than 0.7 mm.
A toothbrush of an embodiment of the present invention may be as follows: the difference in the hair length between the 1 st half tuft and the 2 nd half tuft is in the range of 1mm to 3 mm.
A toothbrush of an embodiment of the present invention may be as follows: the 2 nd hair bundle is set to be more than 5 bundles and less than 8 bundles.
A toothbrush of an embodiment of the present invention may be as follows: the 1 ST tuft is composed of ST bristles. The ST bristles are super tapered bristles, the tips of which are tapered bristles.
A toothbrush of an embodiment of the present invention may be as follows: the dimensions of the brush head length of the brush head part and the brush head width in the direction crossing the brush head length are both more than 9mm and less than 16 mm. Here, the brush length of the brush head portion is a length along the extending direction of the handle body, and the brush width is a length in a direction intersecting the extending direction of the handle body.
[ Effect of the invention ]
The invention provides a toothbrush which can accurately clean the gaps between teeth without causing uneasiness in terms of gum pain during operation.
Drawings
Fig. 1 is a plan view of the toothbrush of embodiment 1.
Fig. 2 is a rear view of the toothbrush shown in fig. 1.
Fig. 3 is a view from perspective B of the toothbrush shown in fig. 2.
Fig. 4 is an enlarged front view of the portion enclosed by the area a in the toothbrush shown in fig. 1.
Fig. 5 is a sectional view taken along line a-a' of fig. 4.
Fig. 6 is a view showing a head portion of the toothbrush of embodiment 2.
FIG. 7 is a perspective view showing the tuft structure of the toothbrush of embodiment 2.
Fig. 8 is a view showing a head portion of the toothbrush of embodiment 3.
Fig. 9 is a view showing the configuration of the outer peripheral tufts.
[ description of symbols ]
L, brush head length, M, bristle length difference, W, brush head width, 10, 20, 30, toothbrush, 14, 24, tuft, 14A, 24A, 34A, central tuft (tuft 1), 14B, 24B, 34B, peripheral tuft (tuft 2), brush head 16a, side (tuft side), tuft hole 19A, tuft hole 1, tuft hole 19B, tuft hole 2, tuft hole 34A, tuft half, tuft 2, tuft hole 35B, flat line L1, L2, tuft hole
Detailed Description
Hereinafter, embodiments to which the present invention is applied will be specifically described with reference to the drawings. In addition, the drawings to be described below are for describing the configuration of the embodiment of the present invention, and the size, thickness, dimension, and the like of each portion shown in the drawings may be different from the dimensional relationship of an actual toothbrush.
[ embodiment 1]
Fig. 1 is a plan view of a toothbrush according to embodiment 1 of the present invention. Fig. 2 is a rear view of the toothbrush shown in fig. 1. Fig. 3 is a view from perspective B of the toothbrush shown in fig. 2.
The X direction shown in fig. 1 to 3 indicates the extending direction of the shank 17 constituting the shank 11. The Y direction shown in fig. 1 and 2 represents the width direction of the toothbrush 10. The Z direction shown in FIG. 3 represents the direction of extension of tufts 14. In fig. 1 to 3, the same components are denoted by the same reference numerals.
In fig. 1 to 3, a single brush is shown as an example of the toothbrush 10 of the present invention, and the following description will be made.
As shown in fig. 1 to 3, a toothbrush 10 of the present embodiment includes a handle 11 and tufts 14. The brush head portion 16 is a member extending in the Z direction (or a direction slightly inclined with respect to the Z direction) and having an approximately cylindrical shape in a plan view. Here, the circular shape in plan view means a shape close to a perfect circle, and includes a shape that is not a perfect circle due to the influence of machining accuracy.
The shank 11 has one surface (hair-planted surface) 16a which is a surface on the side from which the tufts 14 protrude and which is formed as a flat surface.
The handle portion 17 is a portion to be held by a hand when the toothbrush 10 is used, and extends in the X direction. The handle portion 17 is provided with a plurality of recessed anti-slip portions 21 on a side close to the neck portion 18 for preventing slipping of fingers when the toothbrush 10 is used.
The neck portion 18 extends in a direction slightly inclined with respect to the X direction, and has a thickness thinner than the shank portion 17. The neck 18 has one end integrated with the head 16 and the other end integrated with the handle 17. That is, the neck 18 connects the brushhead portion 16 and the handle portion 17.
Fig. 4 is an enlarged front view of the portion enclosed by the area a in the toothbrush shown in fig. 1. Fig. 5 is a sectional view taken along line a-a' of fig. 4. Fig. 5 corresponds to the toothbrush shown in fig. 3, in which the portion surrounded by the region C is vertically inverted and enlarged.
In fig. 4 and 5, the same components as those shown in fig. 1 to 3 are denoted by the same reference numerals.
As shown in fig. 4, in the brush head portion 16, a plurality of bristle planting holes 19 for bristle planting bundles are provided in a bristle planting region provided on the side of the one surface 16 a. And a plurality of implantation holes 19 each including a 1 st implantation hole 19A located at the center of the brush head portion 16 and a plurality of 2 nd implantation holes 19B concentrically arranged so as to surround the 1 st implantation hole 19A, and each opening on one surface 16a of the brush head portion 16. In the present embodiment, 62 nd implanted holes 19B are provided around the 1 st implanted hole 19A at the center.
Diameter of the 1 st implantation hole 19A
1.4mm, 2 nd hair-planting holes 19B
2.2mm in diameter, and the peripheral 2 nd implanted holes 19B are larger than the central 1 st implanted holes 19A
Diameter of the 1 st implantation hole 19A
The thickness is not limited to 1.4mm, and may be set within a range of 1 to 2 mm. In addition, the diameter of the No. 2 hair-planting hole 19B
The thickness is not limited to 2.2mm, and may be set within a range of 2 to 3.5 mm. Further, the diameter of the 1 st implantation hole 19A
Diameter of the No. 2 hair planting hole 19B
The difference is preferably 0.3mm or more, more preferably 0.5mm or more and 1.5mm or less.
The depth d of each implant hole 19 in the Z direction can be set appropriately within a range of 3.0 to 6.0mm, for example, with reference to the one surface 16 a.
The shank 11 constructed as described above can be manufactured by integral molding. The material of the shank 11 may be determined in consideration of the rigidity, mechanical properties, and the like required for the shank 11, and for example, a hard resin having a flexural modulus of elasticity (JIS K7203) in the range of 500 to 3000MPa may be used.
AS such a hard resin, for example, any 1 kind of polypropylene (PP), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polycyclohexanedimethanol terephthalate (PCT), Polyacetal (POM), Polystyrene (PS), acrylonitrile-butadiene-styrene resin (ABS), Cellulose Propionate (CP), polyarylate, polycarbonate, acrylonitrile-styrene copolymer resin (AS), or a combination of 2 or more kinds thereof can be used.
As shown in fig. 5, the tufts 14 are constituted by a central tuft (1 st tuft) 14A implanted in the 1 st implanted hole 19A and a plurality of (6 tufts) outer peripheral tufts (2 nd tuft) 14B implanted in the plurality of 2 nd implanted holes 19B. Peripheral tufts 14B are coarse tufts having a larger diameter than central tufts 14A.
The number of outer peripheral tufts 14B is not limited to 6 tufts, but may be 5 tufts or 7 tufts or more.
The number of outer peripheral tufts 14B is set according to the size of the straight hair surface 16a, and is preferably 5 to 8 tufts.
The bristles of central tuft 14A are longer than those of the peripheral tufts ( peripheral tufts 14B, 14B. cndot.), and tuft end face 1a is substantially parallel to face 16 a. On the other hand, each of the tuft end faces 1B is inclined with respect to each of the extending directions and the one face 16a with respect to each of the outer peripheral tufts 14B. The "inclination" includes a concave curved shape and a convex curved shape in addition to the linear configuration of the tuft end face 1b as shown in fig. 5.
In addition, tuft end surface 1a of central tuft 14A is approximately circular in plan view, and tuft end surface 1B of peripheral tuft 14B is elliptical in plan view.
The bristles constituting the central tuft 14A were ST bristles (super cone bristles) 6mil thick with a sharp point. The bristles constituting the outer peripheral bundle 14B are straight (straight) bristles of 4mil thick and thin having the same diameter up to the tip. Central tuft 14A has a hair length L1 of 8 mm.
On the other hand, the outer peripheral tufts 14B are formed by bundling a plurality of bristles having different bristle lengths.
Specifically, the bristles have lengths L2 to L3 gradually increasing from the outer side of the concentric circle to the center (center tuft 14A), and are formed of bristles having lengths in the range of 5mm to 7 mm. The bristles of outer peripheral tufts 14B provided around central tuft 14A are maintained at an inclined length, thereby forming a dome shape in which central tuft 14A protrudes as a whole of tuft 14.
The brush head portion 16 appears approximately circular in plan view, with a brush head width W in the Y direction of 12mm and a brush head length L in the X direction of 15 mm.
As described above, the brush head length of the brush head portion is a length along the extending direction of the handle body, and the brush head width is a length in a direction intersecting the extending direction of the handle body. In the present embodiment, the dimensions of the brush length of the brush head portion 16 and the brush width in the direction intersecting the brush length are both 9mm to 16 mm.
The toothbrush 10 of the present embodiment has tufts 14 around the central tuft 14A, which are arranged concentrically with respect to the outer peripheral tuft 14B, which is softer than the central tuft 14A and has a large diameter. The protruding central tufts 14A sweep the gum portion and the peripheral tufts 14B gently brush the peripheral gums.
The "softness" of the outer peripheral tufts 14B is appropriately selected depending on the diameter, length, material, bristle shape, and the like of the tufts under the condition that "soft touch feeling" necessary for a periodontal disease patient and "appropriate stiffness of the bristles (waist) for cleaning stains" to be described later can be ensured.
Unlike the toothbrush composed of 1 tuft, the toothbrush 10 of the present embodiment is difficult to locally apply pressure to the cleaning site because the brush (tufts 14) is composed of a plurality of tufts. That is, in the plural tufts constituting tuft 14, outer peripheral tuft 14B has a larger diameter than central tuft 14A. Thus, at the tip portion of the brush, the interface between the tufts disappears, including the centrally located central tuft 14A, assuming the flexible nature of a "one large tuft" in the form of a "multiple tuft".
Due to the effect of the integrated flexibility, the local pressure load when cleaning the cervical part can be reduced as compared with a normal single brush. This ensures a "soft touch" necessary for periodontal patients.
On the other hand, the protruding center tufts 14A are responsible for "cleaning force for narrow areas" necessary for local brushing. The center tuft 14A is supported by the plurality of peripheral tufts 14B, so the tip does not avoid the narrow area, and has "moderate stiffness of hair for cleaning stains".
Further, the toothbrush 10 of the present embodiment is also advantageous over a general single-brush, in terms of "ease of use as a local sweeping brush".
With respect to the standard of a general single-bundle brush, the brush head portion 16 is difficult to interfere in the mouth, and it is difficult to sense where the brush portion hits during operation. Therefore, it is difficult for the user to accurately bring the "pointed brush portion" into contact with the cleaning site without discomfort associated with pain. Further, adjustment of "increase or decrease of force" at the time of cleaning is also difficult.
On the other hand, in the toothbrush 10 of the present embodiment, the soft outer peripheral tufts 14B are appropriately in contact with the periphery (teeth and gums) of the area to be brushed, so that the anxiety during cleaning as described above can be alleviated. Further, the outer peripheral tufts 14B are appropriately in contact with the teeth and the gums, and thus serve as a guide for guiding the central tufts 14A to a desired area to be brushed.
Further, since the bending of central tuft 14A is inhibited by the outer peripheral tuft group, even if it is longer than the length of a normal single brush, central tuft 14A is not bent excessively, and cleaning force can be secured.
As described above, according to the toothbrush 10 of the present embodiment, the interdental space can be cleaned accurately without causing discomfort to the gum during the operation.
Further, the specific shape of the central tufts 14A to protrude from the outer peripheral tuft group is not particularly limited.
To improve the gentle feel to the gums, the brush bristles, which combine central tufts 14A and peripheral tufts 14B, are preferably aligned to form a series of smooth curves.
On the other hand, in the case of a large interdental space, it is preferable to provide a step difference of 1mm to 2mm in the projecting width of central tuft 14A.
The shape of the hair bundle and the shape of the implanted hole are not particularly limited. In order to integrate bending of the entire tuft, it is also effective to reduce the distance between the tufts by arranging a plurality of outer peripheral tufts 14B point-symmetrically about central tuft 14A to form outer peripheral tufts 14B in a substantially triangular or substantially fan-shaped configuration.
[ 2 nd embodiment ]
Next, the structure of embodiment 2 of the present invention will be described.
The basic structure of the toothbrush of the present embodiment shown below is substantially the same as that of embodiment 1, but differs in the structure of the tufts. Therefore, in the following description, portions different from those of the previous embodiments will be described in detail, and descriptions of common portions will be omitted. In the drawings used in the description, the same reference numerals are used for the components common to fig. 1 to 5.
Fig. 6 is a view showing a head portion of the toothbrush of embodiment 2. FIG. 7 is a perspective view showing the tuft structure of the toothbrush of embodiment 2.
As shown in fig. 6 and 7, the toothbrush 20 of the present embodiment has the following tufts 24: a plurality of peripheral tufts (2 nd tufts) 24B provided around the central tuft (1 st tuft) 24A are inclined inward toward the central tuft 24A with respect to the normal direction of the one surface 16a to form a tuft 24. Accordingly, the density of the bristles in the tip portion of the tuft 24 is high, and a higher "soft touch" can be ensured.
In the present embodiment, the difference in bristle length between the plurality of bristles having different bristle lengths of the central tufts 24A and the outer peripheral tufts 24B is in the range of 1mm to 3 mm.
Here, the "difference in hair length" refers to a difference in hair length between each of the bristles constituting outer peripheral tuft 24B and the bristles of central tuft 24A, and preferably, the difference in hair length between the bristles of the inner side closest to central tuft 24A in outer peripheral tuft 24B and the bristles of central tuft 24A is 1mm or more; in the outer peripheral tufts 24B, the difference in bristle length between the outer bristles that are farthest from the central tufts 24A and the bristles of the central tufts 24A is 3mm or less.
As described above, according to the toothbrush 20 of the present embodiment, both the invasion of the hair bundle into a narrower cleaning region and the soft contact feeling with the gum can be achieved.
In the present embodiment, the inclination angle θ of each outer peripheral tuft 24B with respect to one surface 16a is preferably up to 10 degrees. When the flat wire is implanted with hair, a method of piercing a hair-implanting needle perpendicularly to a hair-implanting surface (one surface 16a) is generally used. Therefore, when the inclination of the hair bundle with respect to the normal direction of the hair-setting surface is 10 degrees or more, the hair-setting operation becomes difficult. The same applies to in-mold (in mold) flocking without using a flat wire.
[ embodiment 3 ]
Next, the structure of embodiment 3 of the present invention will be described.
The basic structure of the toothbrush of the present embodiment shown below is substantially the same as that of embodiment 1, but differs in the structure of the tufts. Therefore, in the following description, portions different from those of the previous embodiments will be described in detail, and descriptions of common portions will be omitted. In the drawings used in the description, the same reference numerals are used for the components common to fig. 1 to 5.
Fig. 8 is a view showing a head portion of the toothbrush of embodiment 3. Fig. 9 is a view showing the configuration of the outer peripheral tufts.
As shown in fig. 8, in the toothbrush 30 of the present embodiment, a plurality of outer peripheral tufts (2 nd tufts) 34B provided around a central tuft (1 st tuft) 34A are implanted with bristles staggered (off-set) with respect to the head portion 16. That is, each outer peripheral tuft 34B is flocked such that the 1 st half tuft 34A on the side of the central tuft 34A is longer than the second half tuft 34B.
Specifically, as shown in fig. 9, peripheral tufts 34B, which are implanted by inserting flat wire 35 sandwiched between bundles folded in two into 1 st implantation hole 19A, are provided with a difference M in hair length on 1 st half-tuft 34a and 2 nd half-tuft 34B formed by sandwiching flat wire 35.
According to the toothbrush 30 of the present embodiment, the bristle cutting process for adjusting the bristle length of the outer peripheral tufts 34B is not performed, and therefore, the manufacturing process can be simplified. Even if such a bristle cutting step is not performed, a dome-shaped brush having a convex central tuft 34A can be formed, as in the above-described embodiment. This is effective when the outer circumference hair bundle 34B is constituted by ST hair.
In the present embodiment, when the staggered flocking is adopted in the outer peripheral hair bundle 34B, the difference M in hair length between the 1 st half-bundle 34a and the 2 nd half-bundle 34B formed by the staggered flocking is preferably in the range of 1mm to 3 mm. When the difference in hair length is within 1mm, it is difficult to reliably feel the effect of the staggered hair-planting. When the difference in hair length exceeds 3mm, the difference in level in the outer peripheral tufts 34B becomes significant, and the contact feeling with the gum is reduced.
Examples
The present invention will be specifically described below with reference to examples, but the present invention is not limited to the following descriptions.
(production of toothbrushes according to examples 1 to 6 and comparative examples 1 to 3)
Toothbrushes C1 to C6 of examples 1 to 6 were produced as the toothbrushes shown in FIGS. 1 to 5 under the conditions shown in Table 1. Toothbrushes D1 to D3 of comparative examples 1 to 3 were produced under the conditions shown in Table 2.
In example 4, straight hair was used as the center tuft.
In example 5, the diameter of the outer peripheral tufts was set to 1.7mm or less, which was 2.0mm or less.
In example 6, the diameter of each of the central and peripheral tufts was set to 2.0mm or more.
In comparative example 1, the diameter of the central tufts was made larger than that of the outer peripheral tufts.
In comparative example 2, the tips of the outer peripheral tufts were made flat like the central tufts.
In comparative example 3, 2 central tufts were provided and a plurality of peripheral tufts were provided so as to surround them.
[ Table 1]
[ Table 2]
The toothbrushes C1 to C6 of examples 1 to 6 and the toothbrushes D1 to D3 of comparative examples 1 to 3 were evaluated for the feeling of cleaning with local brushing, the feeling of soft contact with the gums, and the handling in the oral cavity.
In the evaluation, the feel of use was "very good +," good "very good", and "not good" fair "good.
The results are shown in Table 1.
As shown in table 1, in the case of the brush configuration in which the outer peripheral tufts are arranged around the central tufts, it is found that favorable results were obtained with respect to the cleaning feeling of the local brushing, the soft contact feeling with the gum, and the operability in the oral cavity under the conditions shown in example 1.
In example 2, the outer peripheral tufts are inclined toward the central tufts, so that the density of the bristles in the bristle tip portions is increased, and the contact feeling with the gum is further improved as compared with example 1.
In example 3, since the outer peripheral tufts into which bristles are implanted are staggered, ST bristles can be used in the outer peripheral tufts while maintaining the inclination of the bristle tips, and the outer peripheral tufts can be formed into a central convex dome shape as in example 1. As a result, the feeling of cleaning with local brushing and the feeling of contact with the gum were further improved as compared with example 1.
It is known from example 4 that when 6mil straight bristles are used as bristles of the center tuft, the feeling of cleaning with a local brush and the feeling of gentle contact with the gum are slightly reduced.
In example 5, the diameter of the outer peripheral tufts was 1.7mm, which was smaller than that of example, and the soft contact feeling with the gum was slightly inferior to that of example 1.
In example 6, the diameter of the central tufts and the diameter of the outer peripheral tufts were both larger than those of the other examples, and therefore, the soft contact feeling with the gum was excellent, but the brush tip, particularly the central tufts, did not easily enter the cleaning portion. In addition, the size of the brush head part is 18mm in brush head length and 15mm in brush head width, which is larger than that of the embodiment 1. From this, it is found that the cleaning feeling as the local brushing and the workability are slightly inferior to those of example 1.
As shown in table 2, it is understood from comparative example 1 that the diameter of the central tufts is larger than that of the outer tufts, so that the brush tip is less likely to enter the cleaning portion, and therefore, the cleaning feeling and the contact feeling are much worse than those of example 1.
As is clear from comparative example 2, the central tufts and the outer tufts are made to have the same bristle length and have a generally flat tuft shape, which is not suitable for local brushing and hardly provides a feeling of cleaning.
In comparative example 3, the outer peripheral tufts were disposed in an elliptical shape around the central tufts of the 2 tufts, and the brush tip was less likely to enter the swept-out portion. In addition, the length of the brush head in the brush head part was 17mm, which was larger than that of example 1. From this, it is understood that the feeling of cleaning, the feeling of contact and the workability are much inferior to those of example 1.
(feeling of cleaning crevice between teeth)
From the results of comparative example 2, it was found that in the case of a flat shape in which the hair lengths of the central tufts and the outer circumferential tufts are equal, a feeling of cleaning as a local brushing is hardly obtained.
(evaluation of Soft touch feeling to gingiva)
From the results of comparative examples 1 and 3, it is understood that when the diameter of the central tufts is the same as or larger than the diameter of the outer circumferential tufts, the soft contact feeling with the gums is reduced. Further, according to example 6, although the diameter of the central tufts is smaller than that of the outer circumferential tufts, the cleaning feeling as the partial brush is reduced because the diameters of the central tufts and the outer circumferential tufts are larger than those of the other embodiments.
(evaluation of oral operability)
From the results of example 6 and comparative example 3, it was found that the oral cavity operability was deteriorated when the brush head portion had a large shape.
According to the above evaluation, in order to ensure a soft touch feeling of the toothbrush to the gum, the thickness (tuft diameter) of the outer peripheral tufts is preferably 2.0mm or more. There is no particular upper limit to the thickness of the outer peripheral tufts, but it is preferably not more than 2.2mm from the viewpoint of workability. On the other hand, the lower limit of the thickness of the outer peripheral tufts is not particularly limited if it is larger than the thickness of the central tufts, but the diameter is preferably 1.4mm or more in order to ensure a feeling of contact with the gum. In this case, it is also necessary to provide a large number of tufts so that the distance between the outer peripheral tufts is not increased. The distance between the bundles is the distance between the edges of the nearest adjacent implanted pores, and is preferably 0.4mm to 0.7 mm. If the distance between the hole edges is less than 0.4mm, the head portion is not likely to be deformed in view of strength. In addition, when the distance between the hole edges is larger than 0.7mm, the bending of the integrated tufts becomes difficult.
The thickness of the bristles constituting the tufts can be appropriately selected to adjust the hardness of the brush according to the symptoms of the gum area of the user, as in a conventional toothbrush. However, in order to ensure the feeling of contact with the gum and the quality of the toothbrush, the thickness of the outer peripheral tufts is preferably in the range of 3 to 6 mils. If the thickness of the brush bristles is less than 3 mils, the self-supporting property and durability of the bundle of bristles are deteriorated. Further, when the thickness of the brush is 6mil or more, it is difficult to ensure a touch feeling.
The thickness of the bristles constituting the center tuft is preferably 4 mils or more because a certain degree of stiffness is required to ensure the cleaning ability of the gum portion. The upper limit is preferably not more than 8mil so as not to damage the gum.
In view of the operability in the oral cavity, the brush length and the brush width of the brush portion are preferably 16mm or less.
While preferred embodiments of the present invention have been described above with reference to the attached drawings, it is needless to say that the present invention is not limited to the examples. Various modifications and alterations can be made within the scope of the technical idea described in the patent claims, as will be apparent to those skilled in the art, and it is understood that they naturally fall within the technical scope of the present invention.
For example, in the above embodiments, the configuration in which one layer of peripheral tufts is provided around the central tufts is exemplified, but a plurality of layers of peripheral tufts may be provided.
In addition, although the structure in which bristles are implanted by inserting flat wires into the implantation holes is described, the present invention is not limited thereto. Examples of the method for implanting the hair bundle include, in addition to the flat-line type method, the following: a thermal bonding method in which the lower end of the bundle of bristles is pressed into molten resin as a head portion and fixed, an in-mold (in-mold) method in which a molten mass is formed by heating the lower end of the bundle of bristles and then the molten resin is injected into a mold to mold the bristle-implanted portion, and the like.
Claims (7)
1. A toothbrush is characterized in that a toothbrush head is provided,
comprises a brush head part which is circular in a plan view and has, on a bristle-implanting surface, tufts composed of 1 st tuft and a plurality of 2 nd tufts which are arranged concentrically with the 1 st tuft as a center and have a diameter larger than that of the 1 st tuft;
the 1 st hair bundle is positioned in the center of the brush head part;
the diameter of the 2 nd implantation hole implanted with the 2 nd hair bundle is more than 2mm,
the 1 ST tuft is composed of ST bristles,
the length of the brush head part and the width of the brush head in the direction crossing the length of the brush head are both below 16mm,
the distance between the edges of the nearest adjacent 2 nd planting holes is more than 0.4mm and less than 0.7mm,
the top end of said 1 st tuft protrudes from the top end of any of said plurality of 2 nd tufts,
at the tip portion of the brush comprised of the tips of said 1 st tuft and the tips of said plurality of 2 nd tufts, the junction between the tufts disappears and said 1 st tuft and said plurality of 2 nd tufts exhibit a bent and flexible behavior as one large tuft.
2. The toothbrush of claim 1,
the plurality of 2 nd tufts are inclined toward the 1 st tuft with respect to a normal direction of the hair-planted surface.
3. The toothbrush of claim 2,
the inclination angle of each No. 2 hair bundle relative to the normal direction of the hair implanting surface is below 10 degrees.
4. The toothbrush according to any one of claims 1 to 3,
the bristle length of the bristles of each of the 2 nd tufts gradually increases from the outer side of the head portion toward the 1 st tuft.
5. The toothbrush according to any one of claims 1 to 3,
said 1 st tuft is implanted by inserting a flat wire sandwiched between two-folded tufts into a 1 st implantation hole provided on said tufting surface,
said 2 nd tuft is implanted by inserting a flat wire sandwiched between two-folded tufts into a 2 nd implantation hole provided on said implanting face,
the 1 st hair bundle and the 2 nd hair bundle are provided with hair length difference on a 1 st half hair bundle and a 2 nd half hair bundle formed by clamping the flat wire.
6. The toothbrush of claim 5,
the difference in the hair length between the 1 st half tuft and the 2 nd half tuft is in the range of 1mm to 3 mm.
7. The toothbrush according to any one of claims 1 to 3,
more than 5 bundles of the 2 nd hair bundles are arranged.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015-119231 | 2015-06-12 | ||
| JP2015119231 | 2015-06-12 | ||
| PCT/JP2016/067219 WO2016199853A1 (en) | 2015-06-12 | 2016-06-09 | Toothbrush |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107635432A CN107635432A (en) | 2018-01-26 |
| CN107635432B true CN107635432B (en) | 2021-09-21 |
Family
ID=57504016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680033780.7A Active CN107635432B (en) | 2015-06-12 | 2016-06-09 | Tooth brush |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6868557B2 (en) |
| CN (1) | CN107635432B (en) |
| MY (1) | MY189015A (en) |
| WO (1) | WO2016199853A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USD1023582S1 (en) | 2022-01-28 | 2024-04-23 | Colgate-Palmolive Company | Toothbrush |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2018452759B2 (en) * | 2018-12-13 | 2022-10-13 | Colgate-Palmolive Company | Oral care implement |
| JP2021083937A (en) * | 2019-11-29 | 2021-06-03 | ライオン株式会社 | toothbrush |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55153937U (en) * | 1979-04-24 | 1980-11-06 | ||
| DE19936637A1 (en) * | 1999-01-12 | 2001-02-15 | Braun Gmbh | Arrangement for removing plaque and cleaning gaps between teeth has rotary brush carrier with central set of bristles, eccentric rim of bristles, brush carrier diameter corresponds to tooth gap |
| JP3583346B2 (en) * | 2000-04-28 | 2004-11-04 | 花王株式会社 | toothbrush |
| US6643886B2 (en) * | 2000-05-18 | 2003-11-11 | Colgate Palmolive Company | Toothbrush having an efficacious bristle pattern |
| JP2005160498A (en) * | 2003-11-28 | 2005-06-23 | Lion Corp | Electric toothbrush |
| JP5147223B2 (en) * | 2006-12-12 | 2013-02-20 | サンスター株式会社 | toothbrush |
| KR101367517B1 (en) * | 2006-12-28 | 2014-02-27 | 라이온 가부시키가이샤 | Toothbrush |
| CN101909484B (en) * | 2007-12-27 | 2013-12-25 | 狮王株式会社 | Toothbrush |
| JP5690523B2 (en) * | 2010-08-06 | 2015-03-25 | ライオン株式会社 | toothbrush |
| JP3192545U (en) * | 2014-06-09 | 2014-08-21 | ファミリー・サービス・エイコー株式会社 | Toothbrush with one tuft |
-
2016
- 2016-06-09 MY MYPI2017704641A patent/MY189015A/en unknown
- 2016-06-09 WO PCT/JP2016/067219 patent/WO2016199853A1/en active Application Filing
- 2016-06-09 JP JP2017523695A patent/JP6868557B2/en active Active
- 2016-06-09 CN CN201680033780.7A patent/CN107635432B/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USD1023582S1 (en) | 2022-01-28 | 2024-04-23 | Colgate-Palmolive Company | Toothbrush |
Also Published As
| Publication number | Publication date |
|---|---|
| MY189015A (en) | 2022-01-19 |
| CN107635432A (en) | 2018-01-26 |
| KR20180018477A (en) | 2018-02-21 |
| JP6868557B2 (en) | 2021-05-12 |
| JPWO2016199853A1 (en) | 2018-03-29 |
| WO2016199853A1 (en) | 2016-12-15 |
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