CN101426396B

CN101426396B - Toothbrush

Info

Publication number: CN101426396B
Application number: CN2007800143662A
Authority: CN
Inventors: 福垣岳宣; 樱井晋也
Original assignee: Sunstar Inc
Current assignee: Sunstar Inc
Priority date: 2006-04-21
Filing date: 2007-04-10
Publication date: 2012-10-24
Anticipated expiration: 2027-04-10
Also published as: EP2011416A1; JP4992285B2; CN101426396A; ES2483691T3; US20090064435A1; EP2011416B1; CA2649825A1; CA2649825C; JP2007289265A; WO2007123013A1; EP2011416A4

Abstract

A tooth brush which is excellent in durability and can give a high massaging effect to a person even with weak gum with a low stimulus and without damaging the gum in various tooth brushing methods, especially in a bath method. The tooth brush comprises bristles (4) implanted on an implanting mount (20), wherein thermoplastic elastomer bristles (41, ----) are implanted in a width-direction inner side region (R1) of the implanting mount (20) and synthetic resin bristles (42, ----) harder than the thermoplastic elastomer bristles are implanted in width-direction opposite outer side regions (R2,R3) of the implanting mount (20) respectively. Especially, each bristle bundle (5) implanted on the mount (20) is so cut that bristles (4) are continuously or stepwise shorter from the inner side toward the outer side in the width direction.

Description

Toothbrush

Technical field

The present invention relates to toothbrush.

Background technology

Proposed in the past in the width exterior lateral area of planting mao platform of toothbrush; The soft bristle of implantation polyesters thermoplastic elastomer etc.; And on inside region, implant the bristle of hard such as nylon; Main when horizontal brush (rotation (rolling) method), utilize the hard bristle of inside region to keep the cleaning effect, utilize the soft bristle in the outside to reach the toothbrush (with reference to patent documentation 1,2) of massage gum effect partly.

Yet, in the method for brushing teeth, except rotary process, also having friction (scrubbing) method, the whole bag of tricks such as Bei Shi method need combination to use the advantage of each method.Particularly; The Bei Shi method is the method that toothbrush and gum is tilt 45 ° of trickle vibrations, and the cleaning effect of the teeth groove that accumulates easily for tartar is than higher cleaning method, when using above-mentioned toothbrush; The hard bristle of inside region can damage gum, can not use for the people a little less than the gum.

In addition, above-mentioned toothbrush utilizes the soft bristle of exterior lateral area to massage gum portion when horizontal brush, but can make the expansion laterally between short-term of this soft bristle through use, and durability has problem.

Patent documentation 1: real fair 6～No. 12647 communiques

Patent documentation 2: special table 2002～No. 514946 communique

Summary of the invention

The present invention In view of the foregoing accomplishes, and it is a kind of in various method for brushing teeth, particularly Bei Shi method that its purpose is to provide, and can access the low high massage effect that stimulates the Anti-dental injury gum to the people a little less than the gum, the toothbrush of excellent in te pins of durability.

In order to address the above problem; A kind of toothbrush of the present invention; It plants Mao Taizhong with bristle; In above-mentioned width inside region of planting mao platform, implant the thermoplastic elastomer hair that constitutes by polyester elastomer or polyamide-based elastomer, in this plants width two exterior lateral area of mao platform, implant the synthetic resin hair harder than above-mentioned thermoplastic elastomer hair.

At this, the diameter of the plastic elasticity chaeta of preferred above-mentioned heat is 0.1mm～0.4mm.Plant hair row (pieces row) and do not have special qualification, be preferably 3～5 row, particularly preferred 3 row.In addition, the pieces row that wherein are made up of the thermoplastic elastomer hair are preferably 1～3 row.

In addition, preferably in above-mentioned width inside region of planting mao platform, in the zone of long side direction front and base end side, implant the synthetic resin hair harder than above-mentioned thermoplastic elastomer hair.

Particularly; Preferred embodiment is for planting the planting in the pore of mao platform above-mentioned; Single or a plurality of inner column remove the long side direction front end plant pore and near the cardinal extremity of neck plant pore each plant in the pore; The pieces that implantation is made up of above-mentioned thermoplastic elastomer hair at the pore of planting of the front and base end side of above-mentioned inner column, is implanted the pieces that is made up of above-mentioned synthetic resin hair with respectively the planting of two outer rows that constitutes across above-mentioned inner column in the pore.

In addition; Preferred above-mentioned synthetic resin hair is made up of the polyester resin or the polyamide-based resin that are selected from a kind of in inferior propylene diester of PET, poly terephthalic acid and the polybutylene terephthalate or the melting mixing more than two kinds, the core sheath hair that constitutes for the sheath portion by the core of polyamide-based resin and polyester resin.

In addition, the staple length of each bristle of preferably implanting the above-mentioned Mao Taizhong of planting from the width inboard laterally continuously or ladder shorten.

Particularly seeing from the cross section, is 5～40 ° through the bristle front end of central portion and the straight line of outermost bristle front end with the inclination angle of planting hair side preferably, most preferably is 10～30 °.In addition, the staple length of preferred outermost bristle is more preferably lacked 1.0～2.0mm than the short 0.5～2.5mm of the staple length of the bristle of central portion.

Particularly, the line that preferably passes through each bristle front end is from the roughly linearly shape inclination laterally of width central portion, and the staple length of each bristle shortens from central portion laterally continuously.

In addition; Preferred example is roughly the same for the staple length of implanting the bristle of respectively planting the pieces in the pore; And the staple length of the bristle of the staple length of the bristle of the pieces in the outside pieces more inboard than above-mentioned width of planting mao platform is short, and the staple length of each bristle shortens from central portion laterally ladder.

Preferred above-mentioned thermoplastic elastomer hair is that the thermoplastic elastomer of 30D～100D constitutes by hardness.

Toothbrush according to above the application's invention; Particularly in the Bei Shi method; Since with gum or tooth between planting in mao platform width inside region of contact of sensitive areas implant above-mentioned thermoplastic elastomer hair, be difficult to injured, as to massage gum effect so play.In addition, in the Bei Shi method since with exterior lateral area that facing contacts in; The synthetic resin hair that implantation is harder than elastomer; So can improve between facing, tooth, the cleaning property of gum, and utilize the synthetic resin hair of exterior lateral area to support the elasticity chaeta of inside region, not only can suppress the expansion of elasticity chaeta; Improve durability, and can improve the cleaning effect of this elasticity chaeta.

In addition, because the diameter of thermoplastic elastomer hair is 0.1mm～0.4mm, so can improve the cleaning property of this elasticity chaeta to the trickle part in the gap of portion between tooth and gum or between tooth.

In addition; Because in the hole foremost of central array and near the implantation synthetic resin hair harder in the hole of neck and the outer rows than above-mentioned thermoplastic elastomer hair; So except that from width; Also can suppress expansion, therefore can further improve the cleaning property and the durability of above-mentioned elasticity chaeta from length direction, promptly from supporting soft elasticity chaeta with hard synthetic resin hair on four sides.

In addition; Since the staple length of each bristle of planting mao platform from the width inboard laterally continuously or ladder shorten; When cleaning with the Bei Shi method, can avoid contacting with gum with the synthetic resin hair of the outer rows that contacts the opposite side of facing side, utilize long elasticity chaeta can obtain sufficient massage effect and trickle part cleaning property; And the synthetic resin hair of utilization and facing contact side can be kept sufficient cleaning property.In addition,, contact with gums, prevent to damage gums so can reduce this synthetic resin hair during horizontal brush like this because the synthetic resin hair of outer rows is short.

Because above-mentioned thermoplastic elastomer hair is that the thermoplastic elastomer of 30D～100D constitutes by hardness, so can suppress the stimulation to gums portion, obtains good massage effect, can obtain excellent cleaning property simultaneously.

Description of drawings

Fig. 1 is the stereogram of major part of the toothbrush of expression first embodiment of the present invention.

Fig. 2 is the side view of looking sideways from identical length direction front end.

Fig. 3 is identical plane.

Fig. 4 is the key diagram of the type of service of the identical Bei Shi method of expression.

Fig. 5 (a) and (b) are key diagrams of representing the variation of first embodiment respectively.

Fig. 6 (a) and (b) are key diagrams of another variation of expression.

Fig. 7 is the stereogram of major part of the toothbrush of expression second embodiment of the present invention.

Fig. 8 is the side view of looking sideways from identical length direction front end.

Fig. 9 is identical plane.

Figure 10 is the key diagram of the type of service of the identical Bei Shi method of expression.

Figure 11 (a) and (b) are key diagrams of major part of the synthetic resin hair of expression second embodiment.

Figure 12 (a) and (b) are key diagrams of the variation of the identical synthetic resin hair of expression.

Figure 13 (a)～(e) is the key diagram of another variation of the identical synthetic resin hair of expression.

Figure 14 (a) is the key diagram of another variation of the identical synthetic resin hair of expression (b).

Symbol description

1---toothbrush

2---the brush body

3---brush portion

4---bristle

5---pieces

20---plant a mao platform

20a---plant pore

21---head

41---the thermoplastic elastomer hair

42---the synthetic resin hair

60---sheath portion

61---the core hair

63---unit cross section key element

θ---inclination angle

H1, h2---staple length is poor

R1, R2, R3, R10, R11---zone

The specific embodiment

Secondly, based on accompanying drawing embodiment of the present invention is carried out detailed explanation.

Fig. 1 is the key diagram of expression Tooth-brush structure of the present invention.Fig. 1～6 expressions, first embodiment, Fig. 7～14 expressions, second embodiment.Symbol 1 is a toothbrush among the figure, and 2 are the brush body, and 3 is brush portion.

As shown in Figure 1; Toothbrush 1 of the present invention is characterised in that; In planting mao platform 20, implant bristle 4; In planting the width inside region R1 of mao platform 20, implant thermoplastic elastomer hair 41 ..., in this plants two exterior lateral area R2, R3 of the width of mao platform 20, implant respectively than the hard synthetic resin hair 42 of the plastic elasticity chaeta of above-mentioned heat ...

At first, based on Fig. 1～6 explanations, first embodiment of the present invention.

As shown in Figure 1, the toothbrush 1 of this embodiment has plastic brush body 2 and is located at the brush portion 3 in mao platform 20 of planting of body 2.Brush body 2 is by constituting through the injection molding of synthetic resin such as polypropylene integrally formed plant mao platform 20, head 21 and diagram abridged shank.

As shown in Figure 2; Be located at the brush portion 3 of planting in mao platform 20 and will assemble a plurality of bristles 4 ... The pieces 5 that constitutes is converted into two U types; With horizontal line (all being called metal wire rod, rack etc.) embed fixing (squeezing into) to plant respectively planting of mao platform 20 implant among the pore 20a be provided with after; The leading section of each pieces 5 is cut hair (pruning), high-quality green tea is trimmed formation.

In addition, bristle 4 is fixed on the method for planting in mao platform 20, except the method for utilizing above-mentioned horizontal line; Can also carry out heat through the base portion to the pieces of assembling identical bristle is melting to form and is merging piece; When the brush body is shaped, base portion is configured in the forming cavity, bristle is fixed on facture in the type of planting Mao Taizhong through integrally formed; In addition, can also adopt the fur planting methods same such as the method for fusing into prior art.

In the present example, be provided with three row pieces row along the length direction of planting mao platform 20.Thermoplastic elastomer hair 41 is classified at one of center as ... Pieces row, each row of the outside parallel with it make respectively than the hard synthetic resin hair 42 of the plastic elasticity chaeta of above-mentioned heat ... Pieces row.In the present invention, the quantity of pieces row, the pieces quantity that constitutes each row, configuration are closed class to have no restriction are self-evident.

Specifically, thermoplastic elastomer hair 41 is that polyester elastomer or the polyamide-based elastomeric thermoplastic elastomer of 30D～100D makes by hardness, is set at diameter 0.1～0.4mm.When diameter is thinner than 0.1mm, can not get sufficient durability, when thicker than 0.4mm, the cleaning property reduction in gap.More preferably be set at 0.15～0.25mm.In addition, when hardness ratio 30D is low, can not get cleaning property, when higher, strong excessively to the stimulation of gum than 100D.Be preferably set to 55～80D.

Above-mentioned thermoplastic elastomer is the engineering plastics with caoutchouc elasticity; Can use " Hytrel " (eastern レデユ Port Application society system); " Arnitel " (Akzo society system); The polyester elastomer of " Gaflex " (GAF society system) " ペ Le プレ Application " (Toyo Boseki K.K's system) etc., or " グリラ Star Network ス " (big Japanese イ Application キ chemical industry Co., Ltd. system), the polyamide-based elastomer of " Pebax " (Atochem society system) etc.

In addition; Synthetic resin hair 42 is harder than thermoplasticity elastomer hair 41; In its raw material, can use the polyamide-based resin of nylon or aromatic polyamides etc., or be selected from polybutylene terephthalate, the polyester resin a kind of or melting mixing more than two kinds of polytrimethylene terephthalate (the inferior propylene diester of poly terephthalic acid) or PET; Polyolefin resins such as polypropylene or polyethylene etc. can use well-known synthetic resin as the bristle of toothbrush.

Particularly by nylon or be selected from polybutylene terephthalate, it is preferred that the bristle of the polyester resin formation a kind of or melting mixing more than two kinds of inferior propylene diester of poly terephthalic acid and PET can access good cleaning property this point.

As shown in Figure 2, plant cutting hair the staple length of bristle 4 being shortened from the width inboard laterally continuously of each pieces 5 in mao platform 20.That is, the pieces of the hot plastic elasticity chaeta 41 of cutting central series makes that the bristle at its center is the highest, shortens gradually to two outsides, and the pieces of the synthetic resin hair 42 of cutting outer rows makes to shorten gradually laterally from the inboard.

In the present example, cutting makes from the roughly linearly shape inclination laterally of width central portion through the line of the front end of each bristle.Be set at 5～40 ° with respect to this tiltangle of planting hair side, the poor h1 of the staple length of the staple length of the bristle of central portion (thermoplastic elastomer hair 41) and outermost bristle (synthetic resin hair 42) is set at 0.5～2.5mm.

Like this, through setting staple length short more, as shown in Figure 4 more laterally; Make toothbrush to 45 ° of gum tilt; In the Bei Shi of the trickle vibration of longitudinal direction method, utilize long elasticity chaeta 41, can obtain sufficient massage effect and trickle part cleaning property; And the synthetic resin hair of utilization and flank of tooth contact side can be kept sufficient cleaning property, and the synthetic resin hair below can avoiding contacts with gum and gum is caused damage.When staple length difference h1 than 0.5mm hour, be difficult to differentiate and the difference of the sensation of tooth and gum touching and straight brush, can not obtain the massage effect of elasticity chaeta fully, in addition, in cleaning, the possibility height that the synthetic resin hair of below contacts with gum.In addition, when bigger than 2.5mm, the elasticity chaeta is long, can not utilize the synthetic resin hair to support leading section fully, massage effect and the reduction of trickle part cleaning property, and the synthetic resin Maonans of top is to contact the reduction of cleaning property fully with the flank of tooth.That is, have only central portion to contact, can't expect cleaning property facing portion with object portion.

Moreover; Likewise also preferred shown in Fig. 5 (a) roughly curve-like cut obliquely; Or shown in Fig. 5 (b); Only same with the synthetic resin hair 42 of outer rows, cut obliquely with the mode that shortens than thermoplastic elastomer hair 41 weak points and the outside of central series, the pieces front end of the thermoplastic elastomer hair 41 of central array flatly cuts.In this case, in sectional view, the front end of bristle that preferably will be through the center and the straight line of outermost bristle front end are set at 5～40 ° with respect to the tiltangle of planting hair side.

In addition, shown in Fig. 6 (a), preferably in the above-mentioned width inside region R1 that plants mao platform, will implant in the region R 11 of region R 10 and base end side of length direction front ends than above-mentioned thermoplastic elastomer hair 41 hard synthetic resin hairs 42.In embodiment illustrated,, implant the pieces that constitutes by above-mentioned synthetic resin hair the planting pore and constitute of the length direction front and base end side of central series across respectively the planting in the pore of two outer rows of above-mentioned inboard example.Thus, the thermoplastic elastomer hair 41 ... From the four sides of width and length direction, to be surrounded by hard synthetic resin hair 42, the cleaning property and the durability of elasticity chaeta 41 are higher.

In this case, the synthetic resin hair 42 of region R 10,11 can be identical staple length with thermoplastic elastomer 41 also.In addition; Shown in Fig. 6 (b), preferably same with the synthetic resin hair 42 of exterior lateral area R2, R3, than thermoplasticity elastomer hair 41 short the and outside, be that length direction front end or cardinal extremity tilt shortly; The front end of cutting pieces can prevent that this synthetic resin hair 42 from contacting with gum.

In each pieces 5, cut leading section it is tilted at width, but also can form concavo-convex at length direction.In addition, if the processing of the leading section of thermoplastic elastomer hair 41 or synthetic resin hair 42 is in a taper shape, then to the insertion property raising of narrow.

Secondly, according to Fig. 7～14 explanations, second embodiment of the present invention.

In the toothbrush 1 of this embodiment, same with above-mentioned first embodiment, along the length direction of planting mao platform 20 3 row pieces row are set.Thermoplastic elastomer hair 41 is classified at one of center as ... Pieces row, each row of the outside parallel with it make the synthetic resin hair 42 harder than above-mentioned thermoplastic elastomer hair respectively ... Pieces row.

Like Fig. 7 and shown in Figure 8, the leading section of each pieces 5 respectively in advance implant under the state of approximate horizontal or plant hair after be cut into approximate horizontal, stepped laterally ground (in the present example, step difference is 1 layer) shortens the staple length that makes bristle 4 from the width inboard.That is, the staple length of the synthetic resin hair 42 of the pieces of formation outer rows is shorter than the staple length of the thermoplastic elastomer hair 41 of the pieces that constitutes central series, and its difference h2 is set at 0.5～2.5mm.In sectional view, be set at 5～40 ° with respect to the tiltangle of planting hair side through the bristle front end of central portion and the straight line of outermost bristle front end.

Same with the situation of above-mentioned first embodiment thus; Shown in figure 10; Making toothbrush, in the Bei Shi of the trickle vibration of longitudinal direction method, utilize long elasticity chaeta 41 can obtain sufficient massage effect and trickle part cleaning property to 45 ° of gum tilt; And the synthetic resin hair of utilization and flank of tooth contact side can be kept sufficient cleaning property, and the synthetic resin hair below can avoiding contacts with gum and gum is caused damage.

In the present example, shown in figure 11, the synthetic resin hair 42 that particularly constitutes the pieces of outer rows is that the plastic long filament of core sheath structure constitutes by the cross section, forms three core hairs 61 from the front end of sheath portion 60 is outstanding.This toothbrush can be through using by constituting core 61 with polyamide-based resins such as nylon as the material of principal component; Utilization is the resin monofilament that is combined into that the material of principal component constitutes sheath portion 60 with polyester resins such as polybutylene terephthalates; This monofilament is immersed in the soups such as caustic soda; Remove sheath portion 60 through promoting from the front end dissolving; Make core 61 expose manufacturing, adopt this synthetic resin hair, the tartar of narrows such as the line of demarcation between between cog portion or tooth and the gum is removed effect and the raising of cleaning property.

In legend, three core chalazas go out, but shown in figure 12, and its radical can be 1, in addition, also can for two, more than four.In addition, utilize the concentration or the dip time of soup, the speed that promotes from soup etc. can suitably be adjusted the tapering shape of sheath portion 60 front ends or the exposed length of core hair 61.The tapering shape of sheath portion front end can improve the insertion property and the attainability of trickle part in the oral cavity.The leading section of core hair 61 is shaped as arbitrarily, can be processed into suitable shapes such as hemispherical.

In addition; As the taper hair that in synthetic resin hair 42, uses; Except core sheath structure, shown in Figure 13 (a) and (b), can the front end of the synthetic resin system long filament with the cross sectional shape that connects a plurality of units cross section key element 63 be immersed in the solution such as alkali or acid; Can be formed in the taper hair that the bristle front end forms with the branched hair of the taper tapering shape of the corresponding number of number of the unit cross section key element that is connected; Utilize the concentration or the dip time of soup, the speed that promotes from soup etc. can at random be adjusted the shape or the length of branched hair.

Equally, the bristle that Figure 13 (c) expression is made up of two unit cross section key elements, (d) expression makes three unit cross section key elements become row bristle side by side, (e) representes the bristle that is made up of 4 unit cross section key elements.Equally, the branched hair of taper tapering shape can be formed in the taper hair that the bristle front end forms.In addition, shown in figure 14, the central part of key element is provided with core in the constituent parts cross section, can respectively branched hair be made core sheath structure same as described above.

The toothbrush of in above each embodiment, explaining can be used as handle portion and does shortly, is installed on the brush body with drive unit, and the brush of the electric toothbrush of brush portion 3 vibrations is used.

Embodiment

Below, in various embodiments of the present invention, explain and carried out the result that officials such as cleaning property test, endurancing, the sensation of brushing teeth can test.

The toothbrush of the embodiment 1～6 that uses in the test, the toothbrush of comparative example 1～5 such as below table 1.Three row pieces row by central series and two outer rows constitute respectively, and " elastomer " is by the thermoplasticity polyester elastomer of the diameter 0.2mm (bristle that (eastern レデユ Port Application society's system " Ha イトレ Le ") constitutes.The bristle that " polyester hair " constitutes for the mixture by inferior propylene diester of the poly terephthalic acid of diameter 0.15mm and polybutylene terephthalate." core sheath " for to be made up of the core of nylon and the sheath portion of polybutylene terephthalate, the diameter that goes out at three core chalazas of front end is the bristle of 0.19mm.So-called " roof type " for the front end that makes bristle from the width center shape that is cut into obliquely of shape linearly roughly laterally, the inclination angle is set at 25 °, the staple length difference of the bristle of central portion and outer end is set at 1.5mm." (it is big to tilt) " for the inclination angle is set at 40 °, the staple length difference of the bristle of central portion and outer end is set at 2.5mm.So-called " convex " is that the staple length of the pieces of outer rows is lacked than the staple length of the pieces of central series; This staple length poor (step difference) is set at 1.0mm, is set at 25 ° through the bristle front end of central portion and the straight line of outermost bristle front end with respect to the inclination angle of planting hair side." (step difference is big) " is 40 ° through the bristle front end of central portion and the straight line of outermost bristle front end with respect to the inclination angle of planting hair side for the staple length difference is set at 2.5mm.

Table 1

	Central array	Outer rows	Cut a mao shape
				Embodiment 1	The elasticity chaeta	Polyester fleece	The roof type
Embodiment
	2	The elasticity chaeta	Core sheath hair	Convex
Embodiment
	3	The elasticity chaeta	Polyester fleece	Roof type (it is big to tilt)
Embodiment 4					The elasticity chaeta	Core sheath hair	Convex (step difference is big)
	Embodiment 5	The elasticity chaeta	Polyester fleece	Straight
Embodiment 6					The elasticity chaeta	Core sheath hair	Straight
	Comparative example 1	Polyester fleece	The elasticity chaeta	Straight
Comparative example 2					The elasticity chaeta	The elasticity chaeta	Straight
	Comparative example 3	Polyester fleece	Polyester fleece	The roof type
Comparative example 4					Polyester fleece	Polyester fleece	Roof type (it is big to tilt)
	Comparative example 5	Polyester fleece	Polyester fleece	Straight

(test of cleaning property)

In each toothbrush of embodiment and comparative example; On the maxilla second premolar part of jaw model, adhere to and intend like patch; This jaw model is installed in scratch brushing emulation (brushingsimulation) device; An end that makes toothbrush plant mao portion contacts with the maxilla second premolar, and toothbrush is set, and makes that planting mao portion covers second premolar.Getting the transverse direction stroke is 20mm; Add the load of 150g, carry out 3 seconds scratch brushing, utilize image analysis apparatus; On each of each position, measure and calculate the area of intending like patch, with remove intend like the area of patch with adhere to the ratio of intending like the area of patch and remove rate as patch.The result is illustrated in the below table 2.(patch is removed rate (%))

◎: more than 90%

Zero: more than or equal to 70% and less than 90%

△: more than or equal to 50% and less than 70%

*: less than 50%

Table 2

Can find out that from table 2 in the

embodiment

1,2,5,6 of roof type, convex, the cleaning ability (on average) of facing portion is all identical with existing polyester hair (comparative example 3～5) with cleaning stability (error) or than its excellence.With the comparison of the comparative example with massage effect 1,2 in, the cleaning property of facing portion and tooth neck is all more excellent.

In

embodiment

3,4, the cleaning property reduction of facing portion, this is because when staple length poor (tilting or step difference) was excessive, the synthetic resin hair of exterior lateral area can not contact with facing fully.

(endurancing)

Toothbrush is immersed in 37 ℃ the warm water; Add the 300g load; Under 10,000 reciprocating situation, measure (A) A-stage the toothbrush short-axis direction plant mao portion's width (being planted the width of the bristle front end of hair), the toothbrush short-axis direction under the state of opening of the hair after (B) moving back and forth for 10,000 times plant mao portion's width; Durability index (the low more durability of index is good more) to utilize computes to go out durability index is the basis, estimates by following benchmark.

Durability index (%)=[(B)/(A)]/100

(determinating reference)

◎：100～150％

○：150～200％

△：200～250％

*: surpass 250%

Table 3

	Durability index (%)	Judge
			Embodiment 1	176	○
Embodiment 2	156	○
			Embodiment 4	165	○
Embodiment 6	157	○
			Comparative example 2	220	△
Comparative example 3	171	○
			Comparative example 4	174	○
Comparative example 5	168	○

Can find out in

embodiment

1,2,4,6,, all to have difficult extensibility, durability identical with existing polyester hair (comparative example 2～5) or on it no matter whether use the elasticity chaeta from table 3.

(sense test)

In each toothbrush of embodiment 1～6, comparative example 1～5, through 10 testers massage true feeling, non-stimulated, sweeping property true feeling arranged, the sense test of the easy property that contacts with the tooth neck, the benchmark evaluation shown in below utilizing respectively.

(massage true feeling)

◎: can feel significantly

Zero: can feel

△: can not how to feel

*: can not feel fully

(having non-stimulated)

◎: do not stimulate fully

Zero: less stimulate

△: stimulate a little

*: stimulate very much

(sweeping true feeling, the easy property that contacts with the tooth neck)

◎: very good

Zero: good

△: not so well

*: poor

Table 4

	Massage true feeling	Nonirritant is arranged	Sweeping property true feeling	The easy property that contacts with the tooth neck
					Embodiment 1	◎	◎	◎	◎
Embodiment 2	◎	◎	◎	◎
					Embodiment 3	○	◎	○	◎
Embodiment 4	○	◎	○	◎
					Embodiment 5	○	◎	○	△
Embodiment 6	○	◎	○	△
					Comparative example 1	△	△	△	△
Comparative example 2	○	◎	×	△
					Comparative example 3	×	×	○	○
Comparative example 4	×	×	○	○
					Comparative example 5	△	△	○	△

Can find out from table 4, in embodiment 1,2, with the comparative example that before had massage effect 1,2, polyester hair (comparative example 3～5) relatively, the easy property that have the excellent sensation of brushing teeth, sweeping true feeling, contacts with the tooth neck.

In

embodiment

3,4; The sensation, sweeping true feeling of brushing teeth reduces, and this is because when staple length poor (inclination or step difference) was excessive, the elasticity chaeta of central array was long; Same with comparative example 2; Have the sensation not have dependence, and the synthetic resin hair in the outside can not contact with facing reliably, can not get cleaning fully true feeling.

In straight the cutting in mao shape of embodiment 5,6, the synthetic resin hair of exterior lateral area still contacts with gums, too late embodiment 1,2 aspect the easy property of contact.

(sum total is judged)

With cleaning property, durability, sense test respectively be judged to be the basis, provide by following benchmark and count, make even all, utilize following determinating reference, sum up judgement.

◎: 3 points

Zero: 2 point

△: 1 point

*: 0 point

(sum total determinating reference)

◎: more than 2.5

Zero: 2.0～less than 2.5 points

△: 1.5～less than 2.0 points

*: less than 1.5 points

Table 5

More than embodiment of the present invention is illustrated, but the present invention is not limited to this embodiment, in the scope that does not depart from main points of the present invention, can implement in every way.

Claims

1. toothbrush, it plants Mao Taizhong with bristle, it is characterized in that:

In said width inside region of planting mao platform, implant the thermoplastic elastomer hair that constitutes by polyester elastomer or polyamide-based elastomer; Plant at this and to implant the synthetic resin hair harder in width two exterior lateral area of mao platform than said thermoplastic elastomer hair

Said thermoplastic elastomer hair is that the thermoplastic elastomer of 30D～100D constitutes by hardness,

The core sheath hair that said synthetic resin hair is made up of polyester resin or constitutes for the sheath portion by the core of polyamide-based resin and polyester resin.

2. toothbrush, it plants Mao Taizhong with bristle, it is characterized in that:

The staple length of each bristle of implanting the said Mao Taizhong of planting from the width inboard laterally continuously or ladder shorten,

The core sheath hair that said synthetic resin hair is made up of polyester resin or constitutes for the sheath portion by the core of polyamide-based resin and polyester resin,

Seeing from the cross section, is 5～40 ° through the bristle front end of central portion and the straight line of outermost bristle front end with the inclination angle of planting hair side.

3. according to claim 1 or claim 2 toothbrush is characterized in that:

The diameter of the plastic elasticity chaeta of said heat is 0.1mm～0.4mm.

4. according to claim 1 or claim 2 toothbrush is characterized in that:

In said width inside region of planting mao platform, in the zone of long side direction front and base end side, implant the synthetic resin hair harder than said thermoplastic elastomer hair.

5. toothbrush as claimed in claim 4 is characterized in that:

Plant the planting in the pore of mao platform said; Single or a plurality of inner column remove the long side direction front end plant pore and near the cardinal extremity of neck plant pore each plant in the pore; The pieces that implantation is made up of said thermoplastic elastomer hair; At the pore of planting of the front and base end side of said inner column, and constitute across respectively the planting of two outer rows of said inner column and implant the pieces that constitutes by said synthetic resin hair in the pore.

6. according to claim 1 or claim 2 toothbrush is characterized in that:

Said synthetic resin hair is made up of the resin that is selected from a kind of in PET as polyester resin, the inferior propylene diester of poly terephthalic acid and the polybutylene terephthalate or the melting mixing more than two kinds.

7. toothbrush as claimed in claim 2 is characterized in that:

The staple length of outermost bristle is than the short 0.5～2.5mm of the staple length of the bristle of central portion.

8. toothbrush as claimed in claim 2 is characterized in that:

Line through each bristle front end from the width central portion laterally roughly linearly shape tilt, the staple length of each bristle shortens from central portion laterally continuously.

9. toothbrush as claimed in claim 2 is characterized in that:

The staple length of implanting the bristle of respectively planting the pieces in the pore is roughly the same; And the staple length of the bristle of the staple length of the bristle of the pieces in the outside pieces more inboard than said width of planting mao platform is short, and the staple length of each bristle shortens from central portion laterally ladder.